Consulta: subjectFacets:"Antioxidant activity"
Registros recuperados: 101
Data/hora: 03/06/2024 09:57:04

Respuesta antioxidante al tratamiento con ácido salicílico en plantas de papa infectadas con fitoplasma.
Provedor de dados: 32
Autores: Sánchez Rojo, Silvia.
Durante un ataque patogénico en las células vegetales ocurre sobreproducción de especies reactivas de oxígeno. Esto provoca estrés oxidativo y daño fisiológico. Las plantas toman ventaja de estas moléculas reactivas para desarrollar estrategias que conducen a la autoprotección contra el ataque patogénico. Los fitoplasmas son bacterias sin pared celular que habitan el floema de las plantas y disminuyen el rendimiento, la calidad de los tubérculos y el valor comercial de las cosechas, entre otros daños. El ácido salicílico (AS) activó la respuesta de defensa de plantas de papa contra el ataque del fitoplasma, redujo los síntomas de la infección, favoreció la translocación de fotosintetizados e incrementó la calidad de los tubérculos. El AS indujo efectos a...
Palavras-chave: Estrés biótico; Punta morada de la papa; Actividad antioxidante; Especies reactivas de oxígeno; Biotic stress; Potato purple top; Antioxidant activity; Oxygen reactive species; Maestría; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/186

Respuestas de Leucaena leucocephala en simbiosis con Rhizobium y/o micorriza en diferentes etapas de desarrollo durante la fitorremediación de fenantreno.
Provedor de dados: 32
Autores: Villegas Velázquez, Itzel.
En este estudio se evaluó la respuesta de semillas y plántulas de Leucaena leucocephala ante fenantreno (FEN), y el potencial de fitorremediación de FEN por la simbiosis tripartita Rhizobiun-Leucaena-Glomus, mediante el planteamiento de dos fases experimentales. En la primera fase, se evaluó el efecto de tres dosis de FEN (60, 80 y 100 mg L-1) y la inoculación de Rhizobium tropici CIAT 899 en semillas y desarrollo inmediato (10 días) de las plántulas de Leucaena. El FEN no afectó la conductividad eléctrica ni la germinación de semillas, mientras que Rhizobium estimuló la germinación únicamente a las 32 h. El FEN estimuló la longitud radical, pero redujo la longitud del tallo, inhibió la proliferación de pelos radicales y causó lesiones necróticas en...
Palavras-chave: Germinación; Desarrollo de plántulas; Actividad antioxidante; Compuestos fenólicos; Degradación; Germination; Seedling growth; Antioxidant activity; Phenolic compounds; Degradation; Maestría; Fisiología Vegetal.
Ano: 2011
URL: http://hdl.handle.net/10521/516

Respuesta antioxidante al tratamiento con ácido salicílico en plantas de papa infectadas con fitoplasma.
Provedor de dados: 32
Autores: Sánchez Rojo, Silvia.
Durante un ataque patogénico en las células vegetales ocurre sobreproducción de especies reactivas de oxígeno. Esto provoca estrés oxidativo y daño fisiológico. Las plantas toman ventaja de estas moléculas reactivas para desarrollar estrategias que conducen a la autoprotección contra el ataque patogénico. Los fitoplasmas son bacterias sin pared celular que habitan el floema de las plantas y disminuyen el rendimiento, la calidad de los tubérculos y el valor comercial de las cosechas, entre otros daños. El ácido salicílico (AS) activó la respuesta de defensa de plantas de papa contra el ataque del fitoplasma, redujo los síntomas de la infección, favoreció la translocación de fotosintetizados e incrementó la calidad de los tubérculos. El AS indujo efectos a...
Palavras-chave: Estrés biótico; Punta morada de la papa; Actividad antioxidante; Especies reactivas de oxígeno; Biotic stress; Potato purple top; Antioxidant activity; Oxygen reactive species; Maestría; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/186

Respuestas de Leucaena leucocephala en simbiosis con Rhizobium y/o micorriza en diferentes etapas de desarrollo durante la fitorremediación de fenantreno.
Provedor de dados: 32
Autores: Villegas Velázquez, Itzel.
En este estudio se evaluó la respuesta de semillas y plántulas de Leucaena leucocephala ante fenantreno (FEN), y el potencial de fitorremediación de FEN por la simbiosis tripartita Rhizobiun-Leucaena-Glomus, mediante el planteamiento de dos fases experimentales. En la primera fase, se evaluó el efecto de tres dosis de FEN (60, 80 y 100 mg L-1) y la inoculación de Rhizobium tropici CIAT 899 en semillas y desarrollo inmediato (10 días) de las plántulas de Leucaena. El FEN no afectó la conductividad eléctrica ni la germinación de semillas, mientras que Rhizobium estimuló la germinación únicamente a las 32 h. El FEN estimuló la longitud radical, pero redujo la longitud del tallo, inhibió la proliferación de pelos radicales y causó lesiones necróticas en...
Palavras-chave: Germinación; Desarrollo de plántulas; Actividad antioxidante; Compuestos fenólicos; Degradación; Germination; Seedling growth; Antioxidant activity; Phenolic compounds; Degradation; Maestría; Fisiología Vegetal.
Ano: 2011
URL: http://hdl.handle.net/10521/516

Phenolic antioxidants extraction from raspberry wastes assisted by-enzymes
Provedor de dados: 69
Autores: Laroze,Liza; Soto,Carmen; Zúñiga,María Elvira.
The effect of enzymatic hydrolysis on phenolic antioxidant extraction was studied in raspberry solid wastes. This by-product possesses high content of crude fiber (60%) and low values of protein, oil and ash. Raspberry fiber composition suggests that biocatalysts with cellulase, hemicellulase and pectinase activities would be useful for carrying out an enzymatically assisted antioxidant extraction. Hydro-alcoholic extraction was done using different commercial enzymes. Total phenol content and antioxidant activity of enzyme-hydrolyzed residue extracts were measured and compared with those obtained without enzyme application.All biocatalysts evaluated increased soluble solids in comparison to the non-enzymatic control. Among them, Grindamyl and Maxoliva...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Enzymatic extraction; Phenolic compounds.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000600011

Viability of probiotic bacteria and some chemical and sensory characteristics in cornelian cherry juice during cold storage
Provedor de dados: 69
Autores: Nematollahia,Amene; Sohrabvandi,Sara; Mortazavian,Amir Mohammad; Jazaeri,Sahar.
Background: Increased popularity of vegetarianism, lactose intolerance, and the high cholesterol content in dairy products, are all factors that have recently increased the demand for nondairy probiotic products. The objective of this study is to evaluate the effect of refrigeration on the viability of probiotics and asses some of the chemical and sensory characteristics in cornelian cherry juice. Results: The Iranian native probiotic strain (L. casei T4) showed greater viability compared to industrial types (viable count of 8.67 log cfu/mL versus &lt;6.0 log cfu/mL at d 28). However, this most tolerant Iranian strain, could not withstand the conditions of 'Natural juice' at pH 2.6 for more than 7 d. Following a pH adjusted treatment (to pH ~3.5), the...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Anthocyanin; Cornelian cherry; Phenolic compounds; Probiotic; Viability.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000300005

QUALITY OF CAGAITA POWDER BY FOAM LAYER DRYING METHOD AND DIFFERENT FOAMER AGENTS
Provedor de dados: 70
Autores: Cavalcante,Maisa D.; Belisário,Celso M.; Oliveira,Daniel Emanuel C. de; Maia,Geisa Priscilla A. G.
ABSTRACT One of the factors that hinder the usability of Cerrado fruits is their perishable nature, requiring industrial processing to ensure prolonged shelf life. This study aims to determine the optimal foaming agent for industrial processing of this fruit, and to evaluate the physicochemical characteristics and antioxidant activity of dried cagaita powder (Eugenia dysenterica DC) in foam layers at temperatures of 40, 50, 60, and 70 °C. The effectiveness of three foaming agents at various concentrations were tested, and suitable agents were identified based on a factorial analysis of density, expansion, and stability. The physicochemical characteristics of the powder, along with its vitamin A and C and total carotenoid content and antioxidant activity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado fruits; Cagaita powder; Bioactive compounds; Antioxidant activity; Vitamin C; Vitamin A; Carotenoids; Foam layer drying.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300381

The lipidome, genotoxicity, hematotoxicity and antioxidant properties of andiroba oil from the Brazilian Amazon
Provedor de dados: 74
Autores: Milhomem-Paixão,Susana Suely Rodrigues; Fascineli,Maria Luiza; Roll,Mariana Matos; Longo,João Paulo Figueiró; Azevedo,Ricardo Bentes; Pieczarka,Julio Cesar; Salgado,Hugo Leonardo Crisóstomo; Santos,Alberdan Silva; Grisolia,Cesar Koppe.
Abstract Andirobeira is an Amazonian tree, the seeds of which produce a commercially valuable oil that is used in folk medicine and in the cosmetic industry. Andiroba oil contains components with anti-inflammatory, cicatrizing and insect-repellant actions. However, virtually nothing is known of the safety of this oil for humans. The aim of this work was therefore to investigate the hematotoxicity, genotoxicity and mutagenicity of andiroba oil using the comet and micronucleus assays, and to assess its antioxidant properties and lipidome as a means of addressing safety issues. For the experiments, andiroba oil was administered by gavage for 14 consecutive days in nulliparous female Swiss mice randomly distributed in four groups: negative control and three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acute toxicity; Antioxidant activity; Carapa guianensis; Genotoxicity; Lipidomics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000200248

Antioxidant characterization of different italian broccoli landraces
Provedor de dados: 75
Autores: Nicoletto,Carlo; Santagata,Silvia; Pino,Silvio; Sambo,Paolo.
ABSTRACT: The Brassicaceae plants are among the most consumed vegetables in the world. They feature a large biodiversity, in which landraces and primitive cultivars still play a major role on the cultivation systems of many countries. Brassicas and especially broccoli are closely linked to antioxidant compounds that play a key role for human health. This experiment aimed to characterize some Italian unknown broccoli landraces from the antioxidant point of view. Five landraces named BF, BF4, BFT, BB and BS were evaluated. The total antioxidant properties of broccoli were significantly different among ecotypes and the higher values were recorded in BS and BF4. Total phenols showed the higher values in BF4 and concerning the ascorbic acid content found in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica oleracea var. italica; Antioxidant activity; Total phenols; Vitamin C; Hydroxycinnamic acids; Sulforaphane.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000100074

Effect of Salinity and Nitrogen Form in Irrigation Water on Growth, Antioxidants and Fatty Acids Profiles in Halophytes Salsola australis, Suaeda maritima, and Enchylaena tomentosa for a Perspective of Biosaline Agriculture
Provedor de dados: 5
Autores: Certain, Cassandre; Della Patrona, Luc; Gunkel-grillon, Peggy; Leopold, Audrey; Soudant, Philippe; Le Grand, Fabienne.
Cultivation of salt-tolerant crops help to face to irreversible global salinization of freshwater and soils. In New-Caledonia, three halophytes are candidates for saline crops, Salsola australis R.Br., Suaeda maritima (L.) Dumort and Enchylaena tomentosa R.Br. Their success and quality depend yet on availabilities of salinity and essential nutrients in agrosystems. So, we investigated effects of three salinities, i.e., control moderate and high, and five nitrogen ratios, i.e., 100:0, 75:25, 50:50, 25:75 or 0:100 NO3−-N:NH4+-N ratio on their growth and functional value for fatty acids and antioxidants. Results show that the leaf fatty acid and antioxidant profiles of species, emphasize their good potential to become functional crop products, based on...
Tipo: Text
Palavras-chave: Halophyte; Salsola australis; Suaeda maritima; Enchylaena tomentosa; Salt tolerance; Nitrogen form; Fatty acid; Phenolic compounds; Antioxidant activity.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00682/79411/81960.pdf

Diversity and biological activities of the bacterial community associated with the marine sponge Phorbas tenacior (Porifera, Demospongiae)
Provedor de dados: 5
Autores: Dupont, S.; Carre-mlouka, A.; Descarrega, F.; Ereskovsky, A.; Longeon, A.; Mouray, E.; Florent, I.; Bourguet-kondracki, M. L.
The diversity of the cultivable microbiota of the marine sponge Phorbas tenacior frequently found in the Mediterranean Sea was investigated, and its potential as a source of antimicrobial, antioxidant and antiplasmodial compounds was evaluated. The cultivable bacterial community was studied by isolation, cultivation and 16S rRNA gene sequencing. Twenty-three bacterial strains were isolated and identified in the Proteobacteria ( or classes) and Actinobacteria phyla. Furthermore, three different bacterial morphotypes localized extracellularly within the sponge tissues were revealed by microscopic observations. Bacterial strains were assigned to seven different genera, namely Vibrio, Photobacterium, Shewanella, Pseudomonas, Ruegeria, Pseudovibrio and...
Tipo: Text
Palavras-chave: Antimicrobial activity; Antioxidant activity; Antiplasmodial activity; Associated bacteria; Phorbas tenacior; Phylogenetic diversity; RAPD; Sponge.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00372/48276/48535.pdf

Marine green macroalgae: a source of natural compounds with mineralogenic and antioxidant activities
Provedor de dados: 5
Autores: Surget, Gwladys; Roberto, Vania P.; Le Lann, Klervi; Mira, Sara; Guerard, Fabienne; Laize, Vincent; Poupart, Nathalie; Leonor Cancela, M.; Stiger-pouvreau, Valerie.
Marine macroalgae represent a valuable natural resource for bioactive phytochemicals with promising applications in therapeutics, although they remain largely under-exploited. In this work, the potential of two marine green macroalgae (Cladophora rupestris and Codium fragile) as a source of bioactive phenolic compounds was explored, and antioxidant, mineralogenic, and osteogenic activities were evaluated. For each species, a crude hydroalcoholic extract (CE) was prepared by solid/liquid extraction and fractionated by liquid/liquid purification into an ethyl acetate fraction (EAF) enriched in phenolic compounds and an aqueous fraction (AF). Antioxidant activity, assessed through radical scavenging activity and reducing power assay, was increased in EAF...
Tipo: Text
Palavras-chave: Ulvophyceae; Phenolic compounds; Antioxidant activity; Mineralogenic activity; Proliferative activity.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00381/49282/49839.pdf

Identification and functional analysis of a novel mitochondria-localized 2-Cys peroxiredoxin, BbTPx-2, from Babesia bovis
Provedor de dados: 19
Autores: Masatani, Tatsunori; Asada, Masahito; Hakimi, Hassan; Hayashi, Kei; Yamagishi, Junya; Kawazu, Shin-ichiro; Xuan, Xuenan.
Cysteine-based peroxidases, known as peroxiredoxins (Prx) or thioredoxin peroxidases (TPx), are important antioxidant enzymes that prevent oxidative damage caused by reactive oxygen species (ROS). In this study, we identified a novel mitochondrial 2-Cys Prx, BbTPx-2, from a bovine Babesia parasite, B. bovis. BbTPx-2 complementary DNA (cDNA) encodes a polypeptide of 254 amino acid residues. This protein has a mitochondrial targeting peptide at the N-terminus and two conserved cysteine residues of the typical 2-Cys Prx. By using a thiol mixed-function oxidation assay, the antioxidant activity of recombinant BbTPx-2 was revealed, and its antioxidant activity was comparable to that of a cytosolic 2-Cys Prx from B. bovis, BbTPx-1. Notably, we confirmed that...
Palavras-chave: Antioxidant activity; Babasia bovis; Mitochondria; Peroxiredoxin.
Ano: 2016
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4487

Cloning and Characterization of a 2-Cys Peroxiredoxin from Babesia gibsoni
Provedor de dados: 19
Autores: MASATANI, Tatsunori; ASADA, Masahito; ICHIKAWA-SEKI, Madoka; USUI, Miho; TERKAWI, Mohamad A.; HAYASHI, Kei; KAWAZU, Shin-ichiro; XUAN, Xuenan; 河津, 信一郎; 玄, 学南.
Peroxiredoxins (Prxs) are a family of antioxidant enzymes. Here, we cloned a 2-Cys Prx, BgTPx-1, from the canine Babesia parasite B. gibsoni. Sequence identity between BgTPx-1 and 2-Cys Prx of B. bovis was 81% at the amino acid level. Enzyme activity assay by using recombinant BgTPx-1 (rBgTPx-1) indicated that BgTPx-1 has antioxidant activity. Antiserum from a mouse immunized with rBgTPx-1 reacted with parasite lysates and detect a protein with a monomeric size of 22 kDa and also a 44 kDa protein, which might be an inefficiently reduced dimer. BgTPx-1 was expressed in the cytoplasm of B. gibsoni merozoites. These results suggest that the BgTPx-1 may play a role to control redox balance in the cytoplasm of B. gibsoni.
Palavras-chave: Antioxidant activity; Babesia gibsoni; Canine; Peroxiredoxin.
Ano: 2014
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3925

Annual Variations in the Anthocyanin Contents of Blueberry Fruit Grown in Hokkaido
Provedor de dados: 19
Autores: 宮下, 淳一; 西, 繁典; 齋藤, 優介; 小疇, 浩; 弘中, 和憲; 小嶋, 道之.
アントシアニンを多く含有する果物は、健康機能性や色素作用により、非常に高く評価されている。2003 年の冷害年を含む2002～2004 年の摘期に収穫された6 品種の粒大の異なるブルーベリー果実を用いて、それらに含まれるアントシアニン含量を比較検討した。収穫年度により、果実重量あたりのアントシアニン含量は顕著に異なっていた。また、小～中粒果実 (ウェイマウス、ノースランド、ジューン、パトリオット)のアントシアニン含量は、栽培環境に影響を受けにくいが、大粒果実 (ハーバート、ブルーレイ)のそれは栽培環境に影響を受け易いことが示唆された。特に冷害年である2003年のノースランド果実のアントシアニンおよびポリフェノール含量は、他年度のそれらよりも顕著に高く、低温環境においてアントシアニン合成が増加する特徴を持っていると推定された。また、2004年、5 月と6 月の平均気温が長沼町よりも若干低い砂原町で生育したブルーベリー果実の粒大は小さかったが、果実100g 当りのアントシアニン量は高かった。今後、粒大が大きく、アントシアニン含量の高い品種の選抜・育成が期待される。
Palavras-chave: ブルーベリー; 品種選抜; アントシアニン; ポリフェノール; Blueberry; Anthocyanin; Variety selection; Antioxidant activity; Polyphenol; 抗酸化活性.
Ano: 2007
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1607

Viability of peach palm by-product, Spirulina platensis, and spinach for the enrichment of dehydrated soup
Provedor de dados: 86
Autores: Los,Paulo Ricardo; Simões,Deise Rosana Silva; Leone,Roberta de Souza; Bolanho,Beatriz Cervejeira; Cardoso,Taís; Danesi,Eliane Dalva Godoy.
Abstract: The objective of this work was to develop dehydrated soup formulations using flour from peach palm by-product (PPB), Spirulina platensis or spinach, as well as to evaluate their composition by physical, chemical, instrumental, and sensory methods. Four formulations were developed: standard, PPB flour, PPB flour and S. platensis, and PPB flour and spinach. The samples were analyzed for proximate composition, chlorophyll content, total phenolic compounds, antioxidant activity, color, viscosity, water absorption, and microbiological parameters. The sensory characterization was performed by the check-all-that-apply method. The soups containing spinach or S. platensis presented the highest protein contents of 3.3 and 4.6 g 100 g-1, respectively. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bactris gasipaes; Spinacia oleracea; Antioxidant activity; Check-all-that-apply; Fibers; Functional foods.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001101259

INNOVACION DE PRODUCTOS DE ALTO VALOR AGREGADO A PARTIR DE LA TUNA MEXICANA
Provedor de dados: 31
Autores: Sumaya Martinez,   Ma. Teresa; Suarez Dieguez,   Teodoro; Cruz Cansino,   Nelly del Socorro; Alanis Garia,   Ernesto; Sampedro,   Jose G.
In the world, Mexico is the major producer of prickly pears and also has the largest number in varieties. However, in addition to its highly seasonal production, prickly pears are consumed just by a small segment of the Mexican population. Therefore, the promotion of prickly pears consumption in the form of new derivative products by emphasizing its bioactive properties seems to be a possible solution to its low consumption. Recent studies from European and Asian laboratories showed that some prickly pears varieties have a significant antioxidant activity. In Mexico, prickly pears producers are looking for new ways of commercialization. In this regard, similar studies are underway surveying those varieties from the highly producing Mexican states with the...
Tipo: Journal Article
Palavras-chave: Prickly pears; Antioxidant activity; Innovation; Functional food.; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/93913

Dietary Supplementation of Barbatimão (Stryphnodendron Adstringens) and Pacari (Lafoensia Pacari) Extracts on the Oxidative Stability and Quality of Chicken Meat
Provedor de dados: 89
Autores: Lima,CB; Migotto,DL; Oliveira,GR; Souza,TC; Santana,RO; Castejon,FV; Tanure,CBGS; Santana,AP; Stringhini,JH; Racanicci,AMC.
ABSTRACT In order to evaluate the antioxidant effects of barbatimão (BAR) or pacari (PAC) on chicken meat oxidative stability and quality, seven dietary treatments containing in three different BAR and PAC concentrations (200, 400 and 600ppm) plus a negative control (CONT) were fed to 350 broilers from 1 to 41 days of age. Ten birds per treatment were slaughtered to collect breast and thigh meat to evaluate pH, color (L*, a*, b*), cooking weight loss (CWL), and shear force (SF) 24 hours postmortem, and TBARS levels in precooked meatballs stored chilled for 8days. The dietary supplementation with BAR and PAC extracts did not affect pH and color, but reduced (p&lt;0.05) SF in breast meat compared with CONT suggesting improved tenderness. PAC200 increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Brazilian plants; Broiler meat; Quality attributes; TBARS.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000400669

Nutritional quality of the epicarp and mesocarp flours of baru fruits submitted to drying
Provedor de dados: 91
Autores: Silva,Daiana V.; Oliveira,Daniel E. C. de; Resende,Osvaldo; Silva,Marco A. P. da; Barcelos,Keyla R.
ABSTRACT Baru (Dipteryx alata Vogel) is a native tree of the Cerrado. The drying and milling process can be an alternative for the use and conservation of baru fruits. The objective of this study was to evaluate the effect of drying on the nutritional characteristics of the epicarp + mesocarp flour of baru fruits. The fruits were collected in the municipality of Santa Helena de Goiás, Goiás, sanitized and submitted to drying in an oven with air circulation at temperatures of 40, 60, 80 and 100 ºC until they had a constant mass. The analyses were performed in triplicate and the results evaluated by analysis of variance and Tukey test (p ≤ 0.05). Flours produced from dehydrated fruits had a reduction in lipid content (treatments 100 °C), energy value (60 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dipteryx alata Vogel; Antioxidant activity; Phenolics; Carotenoids.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000100065

Anthocyanins, pigment stability and antioxidant activity in jabuticaba [Myrciaria cauliflora (Mart.) O. Berg]
Provedor de dados: 94
Autores: Lima,Annete de Jesus Boari; Corrêa,Angelita Duarte; Saczk,Adelir Aparecida; Martins,Mariana Pereira; Castilho,Rachel Oliveira.
Different solvents were evaluated for the extraction of jabuticaba anthocyanin pigments, identifying, quantifying and verifying the stability of the anthocyanins, as well as the conduction of three antioxidant activity assays and determination of the vitamin C levels. The maceration with ethanol acidified with HCl 1.5 mol L-1 (85:15) provides better pigment extraction and stability. The skin is anthocyanin rich, presenting 1.59 and 2.06 g 100 g-1 of dry matter in the Paulista and Sabará varieties, respectively. Cyanidin 3-glucoside is the majority pigment of the skins, followed by delphinidin 3-glucoside. The highest level of vitamin C was found in the skins and seeds of both varieties. It was verified that the skins, presented more antioxidant activity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jabuticaba; Anthocyanin; Method of extraction; Vitamin C; Antioxidant activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000300023

BOTÂNICA E FISIOLOGIA/ BOTANY AND PHYSIOLOGY ANTIOXIDANT ACTIVITY AND PHYSICOCHEMICAL PARAMETERS IN ‘CUERNAVAQUEÑA’ MEXICAN PLUM (Spondias purpurea L.) AT DIFFERENT RIPENING STAGES
Provedor de dados: 94
Autores: VARGAS,ADABELLA SUÁREZ; JUÁREZ-LÓPEZ,PORFIRIO; LÓPEZ-MARTÍNEZ,VÍCTOR; FLORES,LAURA JOSEFINA PÉREZ; SÁNCHEZ,DAGOBERTO GUILLÉN; ALIA-TEJACAL,IRÁN.
ABSTRACT  Mexican plum (Spondias purpurea L.) ‘Cuernavaqueña’ was harvested at four ripening stages, with the aim of evaluating the concentration of bioactive compounds and antioxidant capacity in the pulp and the epicarp. The highest ethylene production (9.43 mL kg h-1) and total soluble solids concentration (23.9 °Brix) was observed in the fully ripe stage. Titratable acidity was higher in green stage compared to other analyzed ripening stages in both pulp (0.48 %) and epicarp (0.32 %). Fully ripe plum epicarp presented the highest content of total phenols (GAE 190 mg g-1), flavonoids (QE 214 mg g-1), and carotenoids (853 mg g-1) compared to other ripening stages. The antioxidant capacity was higher in the epicarp of the fully ripe fruit compared to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spondias purpurea; Bioactive compounds; Antioxidant activity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000400203

Fruit quality attributes of low chilling requirement ‘Snowchaser’ blueberry cultivated in Brazil
Provedor de dados: 94
Autores: Jimenes,Isabela Maria; Silva,Simone Rodrigues da; Tezotto-Uliana,Jaqueline Visioni; Cantuarias-Avilés,Tatiana.
Abstract  In Brazil there are still few studies on the post-harvest quality of low-chill blueberry cultivars, which have been recently introduced in the country. ‘Snowchaser’ blueberries were evaluated during a six-day storage period regarding fruit physical and chemical properties, and its antioxidant capacity. During fruit storage there was an increased weight loss and maintenance of some skin color properties such as luminosity (L*) and b*, whereas the values of parameter a* decreased and chroma (C) values increased. The levels of anthocyanins and flavonoids in the pulp increased, as well as the antioxidant activity. Maximum fruit shelf life at room temperature was six days without reduction on the antioxidant activity along the period, which is...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Vaccinium corymbosum; Weight loss; Color; Anthocyanins; Flavonoids; Antioxidant activity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000105001

Antioxidant enzymes and antioxidant activity in two soursop selections (Annona muricata L.) from Nayarit,Mexico stored at 15 °C
Provedor de dados: 94
Autores: Balois-Morales,Rosendo; Jiménez-Zurita,José Orlando; Alia-Tejacal,Irán; López-Guzmán,Graciela Guadalupe; Palomino-Hermosillo,Yolotzin Apatzingán; Sánchez-Herrera,Leticia Mónica.
Abstract  The changes in concentration of vitamin C, enzymatic and antioxidant activity during the ripening of two soursop selections (G1 and G2) at room temperature (22 ºC) and refrigeration (15 ºC) with an HR 85% were evaluated. The content of soluble protein, the activity of catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), the concentration of vitamin C, as well as the antioxidant activity was evaluated by DPPH, ABTS and FRAP methods. The initial soluble protein concentration of the G1 and G2 selections diminished at 22 and 15 °C during ripening. Fruits stored at 22 °C showed the highest CAT activity. The maximum activity of SOD was recorded on the sixth and fourth day in fruits stored at 22 and 15 ºC, respectively. Fruits stored at 22 °C...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annona muricata; Ripening; Enzymatic activity; Antioxidant activity; Refrigeration.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000100303

DIETARY FIBRE CONTENT, PHENOLIC COMPOUNDS AND ANTIOXIDANT ACTIVITY IN SOURSOPS (Annona muricata L.)
Provedor de dados: 94
Autores: SIQUEIRA,AMANDA DE MORAIS OLIVEIRA; MOREIRA,ALDENISE CHAGAS CURVÊLO GONÇALVES; MELO,ENAYDE DE ALMEIDA; STAMFORD,THAYZA CHRISTINA MONTENEGRO; STAMFORD,TÂNIA LÚCIA MONTENEGRO.
ABSTRACT  Healthy eating is associated with the consumption of fruits, which are notable for their beneficial effects on human health. The aim of this study was to evaluate the proximate composition, composition of fibers and components with antioxidant activity in soursops varieties Crioula, Lisa and Morada of physiological maturity (PM) and mature (M). The protein, lipid and moisture contents did not differ between soursop varieties, but the ash contents were higher in the Morada-PM (0.56%±0.03) and the Morada-M (0.82%±0.10) varieties. The Crioula-M variety showed higher levels of total dietary fibre (5.76%±0.12). The Lisa-M variety showed higher levels of insoluble dietary fibre (4.46%±0.00). The Lisa-M variety also showed a higher level of phenolic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical fruit; Dietary fibre; Phenolics; Antioxidant activity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452015000401020

ROOTSTOCKS EFFECTS ON THE PHYSICOCHEMICAL CHARACTERISTICS OF BORDÔ, ISABEL AND IAC 138-22 MÁXIMO MUST AND WINE
Provedor de dados: 94
Autores: SILVA,MARLON JOCIMAR RODRIGUES DA; BRUNELLI,LUCIANA TREVISAN; MOURA,MARA FERNANDES; HERNANDES,JOSÉ LUIZ; LEONEL,SARITA; TECCHIO,MARCO ANTONIO.
ABSTRACT  It has been demonstrated that rootstocks can influence grape characteristics, but there are few data in literature about the rootstocks influence in the wine characteristics, especially in wines elaborated with Vitis labrusca or hybrid grapes. This study evaluated the influence of ‘IAC 766’ and ‘106-8 Mgt’ rootstocks on the physicochemical characteristics of ‘Bordô’, ‘Isabel’ and ‘IAC 138-22 ‘Máximo’ musts and wines. The musts were evaluated for pH, soluble solids, total acidity and soluble solids/acidity ratio. The wines were evaluated for density, alcohol content; total, volatile and fixed acidity; pH, dry extract, reducing sugars, reduced dry extract, alcohol in weight/reduced dry extract; free and total sulfur dioxide; anthocyanins,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis sp.; Table wine; Classical analysis; Phenolic compounds; Antioxidant activity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000400201

Development, sensory profile and physicochemical properties of jabuticaba nectar with lyophilized jussara pulp
Provedor de dados: 124
Autores: Suemitsu,Laura; Inada,Kim Ohanna Pimenta; Fernandes,Paula de Oliveira; Perrone,Daniel; Monteiro,Mariana; Melo,Lauro.
ABSTRACT Jabuticaba and jussara are both fruits from the Brazilian Atlantic Forest and endangered plant species due to their unsustainable exploitation. In order to protect these plants, it is important to develop products made with these fruits. We have developed a ready-to-drink jabuticaba nectar with the addition of lyophilized jussara pulp (LJP) applying sensory tests, such as acceptance test and Check-All-That-Apply (CATA). Optimal sensory conditions ranged between 150 g L-1 and 200 g L-1 for sucrose concentration and between 450 mL L-1 and 550 mL L-1 for jabuticaba pulp concentration. Just-about-right scale showed that the ideal concentration of LJP used as a natural color additive was 7.2 g L-1 (R2=0.99902). Affective test showed that nectars added...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Affective test; Just-About-Right scale; Check-All-That-Apply; Antioxidant activity; Phenolic compounds.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000200414

Bioprospecting of Lacmellea standleyi fruits (lechemiel)
Provedor de dados: 98
Autores: Soto Chavarro,Erika Lorena; Chicué,Adriana Maria; Murillo Perea,Elizabeth; Méndez Arteaga,Jonh Jairo.
Introduction: the idea to explore at least some of the regions diversity such as the Colombian Orinoco through bioprospecting study of Lacmellea standleyi (Woodson) Monach. arises as a consequence of ignorance of much of the floristic richness in Colombia and the potential relevance of much of this in the nutrition, health and industry. Objective: to evaluate the antioxidant potential, nutritional and phenolic content, antimicrobial activity, and safety degree of aqueous, ethanol, and ethyl acetate extracts of Lacmellea standleyi fruits in three different ripening stages. Methods: the nutritional value was evaluated using standardized methods to full fruit in its three ripening stages. Each of the extracts was chemically characterized by spectrophotometric...
Tipo: Journal article
Palavras-chave: Lacmellea standleyi; Nutritional content; Bioactive metabolites; Antioxidant activity.
Ano: 2013
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962013000300009

Specific bioassays with selected plants of Bangladesh
Provedor de dados: 98
Autores: Guerrero,Ricardo O; Mahmud,T; Khan,H; Casañas,Bárbara; Morales,Mara.
Summary Bangladesh is an Asian country where only 20 per cent of the people are provided with modern healthcare services while the rest 80 per cent are dependent on traditional plant-based systems. Moreover, it is estimated that only 500 medicinal plant species had been recorded in Bangladesh out of 1,900 species regarded as having medicinal value. Purpose: Sixteen collections of medicinal plants of different families were extracted with several solvents (Ethanol 95%, water, chloroform, ethyl ether). The resulting extracts were subjected to five different specific bioassays: 1. Brine shrimp lethality test; 2. Antioxidant activity; 3. Inhibition of xanthine oxidase (XO); 4. Inhibition of ß-glucosidase, and 5. Inhibition of acetylcholinesterase. Methods....
Tipo: Journal article
Palavras-chave: Bangladesh; Plant extracts; Brine shrimp lethality test; Antioxidant activity; Xanthine oxidase inhibition; SS-glucosidase inhibition; Acetylcholinesterase inhibition.
Ano: 2004
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962004000200009

Effects of extrusion conditions on the physical and functional properties of instant  cereal beverage powders admixed with mulberry (Morus alba L.) leaves
Provedor de dados: 106
Autores: Chulaluck Charunuch; Plernchai Tangkanakul; Nipat Limsangouan; Vayhu Sonted.
On account of studying the feasibility of the production instant cereal beverage powders admixed with mulberry leaves by extrusion process, a box-behnken design of the response surface methodology (RSM) was employed to investigate the interaction of operating conditions at varying screw speed (300, 350 and 400 rpm), mulberry content  (5, 10 and 15%) and feed moisture (15, 17 and 19%) on the physical and  antioxidant property of product. Data were modelled by multiple regression analysis and the coefficient indicating for best fit model. The results showed that the effect of mulberry content and feed moisture had significant on bulk density, color, viscosity, water absorption index, antioxidant activity and total phenolic compound. Increasing of mulberry...
Tipo: PhysicalObject
Palavras-chave: Mulberry leaves; Extrusion conditions; Instant cereal beverage powders; Functional properties; Physical properties; Antioxidant activity; Phenolic compounds; เครื่องดื่มสำเร็จรูปธัญพืช; ใบหม่อน; กระบวนการเอ็กซ์ทรูชั่น; คุณสมบัติเชิงกล; คุณสมบัติเชิงหน้าที่.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5139

Application of mulberry (Morus alba L.) for supplementing antioxidant activity in extruded Thai rice snack
Provedor de dados: 106
Autores: Chulaluck Charunuch; Plerncha Tangkanakul; Saovaluk Runggaeng.
Owing to creation of Thai rice snack with health benefits for higher potential in commercial scale, mulberry leaf was applied in the production of extruded snack product. Mulberry leaf in dried powder was mixed with rice, corn, soy, sugar, oil, vitamins and minerals to investigate the operating conditions with twin-screw extruder at varying mulberry content (5, 7.5 and 10%), screw speed (300 and 350 rpm) and feed moisture (13, 15 and 17%) in the 3 × 2 × 3 factorial experiment. The extrudates were examined of functional properties (antioxidant activity and phenolic compounds) and some physical characteristics (expansion ratio, bulk density, texture measurement and organoleptic test). The results had shown that at higher mulberry content (10%), the product...
Tipo: PhysicalObject
Palavras-chave: Mulberry; Extruded snack; Antioxidant activity; Phenolic compounds; หม่อน; ฤทธิ์ต้านอนุมูลอิสระ; สารฟีโนลิก; เอ็กซ์ทรูดเดอร์; ผลิตภัณฑ์ขนมขบเคี้ยว; ผลิตภัณฑ์แปรรูปจากข้าว; คุณภาพทางประสาทสัมผัส.
Ano: 2006
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5256

ฤทธิ์ต้านอนุมูลอิสระของโปรแอนโทไซยานิดิน และแอนโทไซยานินจากข้าวที่มีสี 4 ชนิด
Provedor de dados: 106
Autores: Nattawat Thitipramot; Nisakorn Sae-won; Phanuphong Chaiwut; Punyawatt Pintathong; Nont Thitilertdecha; Natthanej Luplertlop; Asadhawut Phiranrat.
The objective of this study was to determine proanthocyanidins and anthocyanins content and their antioxidant activity from four pigmented rice: Black glutinous, Homnin, Man-Pu, Sangyod by extract with 6 different solvents: DI water, 1%HCl-DI water, Ethanol, 1%HCl-Ethanol, Acetone, 1%HCl-Acetone. The results showed that the proanthocyanidin and anthocyanin contents were different between rice phenotypes and polarity of solvents (p&lt;0.05). The total proanthocyanidin contents followed the order: Man-Pu, Sangyod, Homnin, Black glutinous. The highest proanthocyanidin content was found in ethanolic extract of Man-Pu rice (0.938 mg ECE/mg extract). Black glutinous rice contained high amount. Total anthocyanin content of the extracts followed the trend: Black...
Tipo: PhysicalObject
Palavras-chave: Man pu rice; Sangyod rice; Black glutinous rice; Hom nin rice; Pro anthocyanin; Anthocyanin; Antioxidant activity; Pigmented rice; ข้าวมันปู; ข้าวสังข์หยด; ข้าวเหนียวดำ; ข้าวหอมนิล; โปรแอนโทไซยานิน; แอนโทไซยานิน; ฤทธิ์ต้านอนุมูลอิสระ.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5427

ความสัมพันธ์ของฤทธิ์ต้านอนุมูลอิสระกับปริมาณ Tocopherol และ gamma aminobutyric acid (GABA) ในข้าวกล้องและข้าวกล้องงอก
Provedor de dados: 106
Autores: Pakinee Akkaravessapong; Suganya Wongpornchai; Sunanta Wongpiyachon; Kitsada Pitija; Angsutorn Wasusun; Panawan Suttiarporn.
Rice contains several kinds of bio-functional components. In this study, γ-aminobutyric acid (GABA) and Tocopherol, or Vitamin E were identified and their relationships to antioxidant activity using DPPH assay of both brown and pre germinated Thai rice varieties were studied. GABA are one of the two inhibitory neurotransmitters which make the neuron resistant to stimulation by excitatory neurotransmitters and inhibitor of some cancer cells activity whereas Tocopherol, or Vitamin E, which acts as antioxidant and improve blood cholesterol. Identification of GABA and Tocopherol in both brown and pre-germinated brown rice grown from different locations were conducted in eleven varieties, namely: Khao Dawk Mali 105, PTT1, CN1, RD31, Sang yod, RD6, Hom...
Tipo: PhysicalObject
Palavras-chave: Antioxidant activity; Rice varieties; Tocopherol; DPPH assay; Brown rice; Pre-germinated brown rice; GABA; Gamma aminobutyric acid; Vitamin e; Nutritive value; Chemical composition; High performance liquid chromatography; HPLC; ฤทธิ์ต้านอนุมูลอิสระ; กาบา; โทโคฟีรอล; พันธุ์ข้าว; ข้าวกล้อง; ข้าวกล้องงอก; วิตามินอี; โครงสร้างทางเคมี; การวิเคราะห์องค์ประกอบทางเคมี; คุณค่าทางโภชนาการ.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5713

Non-enzymatic and enzymatic antioxidant components of the mature Cambuí metabolism
Provedor de dados: 109
Autores: Queiroz-Nazareno,Lailla Sabrina; Alcântara de Miranda,Maria Raquel; Alves-Pinto,Maria Ketully Neyane; Almeida-Lopes,Monica Maria; Moura-Rufino,Maria do Socorro.
Abstract The objective of this work was to identify and evaluate the bioactive compounds, as well as the antioxidant potential, present in mature fruits of cambuizeiro  (Myrcia multiflora) from the Chapada do Araripe, Brazil. In the fruits were evaluated: vitamin C, total anthocyanins, yellow flavonoids, total polyphenols, total antioxidant activity by the FRAP, DPPH and ABTS methods, and the antioxidant superoxide dismutase (SOD) and catalase (CAT) activity. Cambui had an average vitamin C content of 56.40 mg/100 g, 2869.44 mg/100 g total anthocyanins 2858.50 mg/100 g yellow flavonoids and 1007.64 mg EAG/100 g of total polyphenols. While the total antioxidant activity according to FRAP method was 123.94 μM ferrous sulphate/g, DPPH was 1805.66 g/g EC50,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Bioactive compounds; Plant extractivism; Myrcia multiflora; Myrtacea.
Ano: 2019
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122019000100016

Chemical characterization and evaluation of the antioxidant potential of gabiroba jam (Campomanesia xanthocarpa Berg) - doi: 10.4025/actasciagron.v35i1.14389
Provedor de dados: 1
Autores: Santos, Marli da Silva; Universidade Federal do Paraná; Lima, Jair José de; Universidade Federal do Paraná; Petkowicz, Carmen Lúcia de Oliveira; Universidade Tecnológica Federal do Paraná; Cândido, Lys Mary Bileski; Universidade Federal do Paraná/Universidade Tecnológica Federal do Paraná.
Four formulations of gabiroba jam were processed, and their physicochemical and functional characteristics, rheological profile and jam acceptance were assessed. The physicochemical and chemical characteristics evaluated were water activity, titratable acidity, pH, reducing and non-reducing sugars, proteins, ashes, dietary fibers, color, and firmness. For functional analyses of the formulations, vitamin C, phenolic compounds and carotenoid contents were determined. The ABTS+ and DPPH· methods were employed to evaluate the antioxidant potential. Rheological analysis was performed in a HAAKE RS 75 Rheoestress rheometer with a plate/plate sensor. The flow curve behavior was adjusted using the Power Law and Herschel-Bulkley models. Sensory analyses were...
Tipo: Pesquisa
Palavras-chave: 5.00.00.00-4; 5.02.04.00-9; 5.02.02.00-6 gabiroba; Jam; Antioxidant activity; Rheological profile ciências agrarias; Ecnologia e Utilização de Produtos Florestais; Manejo Florestal.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/14389

Protective role of Syzygium cumini leaf extracts against paraquat-induced oxidative stress in superoxide-dismutase-deficient Saccharomyces cerevisiae strains
Provedor de dados: 3
Autores: Soares, Jefferson de Jesus; Rosa, Anderson da Silva; Motta, Paola Ribeiro; Cibin, Francielli Weber Santos; Roehrs, Rafael; Denardin, Elton Luís Gasparotto.
The aim of this study was to evaluate the protective effect of three different extracts prepared from Syzygium cumini leaves against paraquat-induced toxicity in Saccharomyces cerevisiae strains deficient in superoxide dismutase (SOD). Additionally, the extracts phenolic and flavonoid contents, in vitro antioxidant activity, and phytochemical composition (using high-pressure liquid chromatography) were determined. Bioactive compounds from S. cumini leaves were extracted with infusion (traditional method) or ultrasound (aqueous or hydroalcoholic). Compared to the infusion extract, the ultrasound extracts exhibited a greater protective capacity against paraquat toxicity in the yeast cells as well as higher antioxidant activity. These results may be directly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Traditional medicine; Antioxidant activity; Phenolic compounds; Flavonoids; Syzygium cumini; Saccharomyces cerevisiae.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/47139

Optimization of Bioactive Compound’s Extraction Conditions from Beetroot by Means of Artificial Neural Networks (ANN)
Provedor de dados: 111
Autores: Guiné, Raquel P.F.; Mendes, Mateus; Gonçalves, Fernando.
The present work used Artificial Neural Network (ANN) models to correlate beetroot extraction conditions with total phenolic compounds (TPC), anthocyanins (ANT) and antioxidant activity (AOA). The input variables were extraction time, type of solvent, solvent volume/sample mass (VMR) and order of extraction. The ANN models produced showed very good accuracy (R &gt; 94 %), being suitable for data mining using weight analysis techniques. The experiments involved variable conditions: solvents (Methanol, ethanol:water and acetone:water), extraction times (15 and 60 min), VMR (5, 10 and 20), order of extract (3 sequential extractions). The TPC were evaluated by the Folin-Ciocalteu method, ANT by the SO2 bleaching method and AOA following the ABTS method. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food Science; Food Chemistry Phenolic compounds; Antioxidant activity.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5449

Improving drought tolerance of quinoa plant by foliar treatment of trehalose
Provedor de dados: 111
Autores: Dawood, Mona Gergis.
Two field experiments were conducted during two successive seasons (2014/2015 and 2015/2016) at the Experimental Station of National Research Centre, Nubaria district, Beheira Governorate, Egypt, to study the effect of foliar treatment of quinoa plants with trehalose (Tre) (100µM and 500µM) on growth, photosynthetic pigments, seed yield quantity &amp; quality, in fever of nutritional and antioxidant compounds in the yielded quinoa seeds which subjected to water deficiency (skipping two irrigation times at 50 &amp; 60 days after sowing). Water deficiency caused marked decreases in quinoa plant growth parameters (shoot height, fresh and dry weights of shoot/plant) and photosynthetic pigments with marked increases in root growth parameters (root length, fresh...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Drought; Flavonoids; Oil; Phenolics; Protein; Quinoa; Trehalose.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4539

TOTAL PHENOLIC CONTENT AND ANTIOXIDANT CAPACITY OF NON-NATIVE WINE GRAPES GROWN IN ZACATECAS, MEXICO
Provedor de dados: 115
Autores: Franco-Bañuelos,Ambrosio; Contreras-Martínez,Cristina S.; Carranza-Téllez,José; Carranza-Concha,José.
Abstract The production of non-native wine grapes (Vitis vinifera L.) in Zacatecas, Mexico has increased in recent years; however, information about their chemical composition is not yet available. Polyphenols are associated with the antioxidant capacity of grapes due to their beneficial health effects. Therefore, the aim of this study was to evaluate the total phenolic content (TPC) and the antioxidant capacity (AC) of non-native wine grapes grown in Zacatecas, México. The AC and TPC of 4 white grape varieties and 4 red grape varieties were analyzed. Experimental design was completely randomized with three replications and the data was analyzed using ANOVA and compared with Tukey test (p≤0.05). Pearson’s correlation and linear regression were calculated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wine grape cultivars; Phytochemicals; Antioxidant activity.
Ano: 2017
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952017000600661

Chemical composition, botanical evaluation and screening of radical scavenging activity of collected pollen by the stingless bees Melipona rufiventris (Uruçu-amarela)
Provedor de dados: 42
Autores: Silva,Tania M.S.; Camara,Celso A.; Lins,Antonio C.S.; Agra,Maria de Fátima; Silva,Eva M.S.; Reis,Igor T.; Freitas,Breno M.
Stingless bees in Brazil are indigenous and found all over the country. Bee pollen is used for its nutritional value in the human diet. It is made up of natural flower pollen mixed with nectar and bee secretions. In order to evaluate the chemical composition, free radical scavenging activity, and botanical origin, sample of pollen loads from stingless bee, Melipona rufiventris (Uruçu amarela) was studied. The EtOAc extract of pollen of Melipona rufiventris yielded the following compounds: p-hydroxycinnamic acid, dihydroquercetin, isorhamnetin, isorhamnetin3-O-(6"-O-E-p-coumaroyl)-β-D-glucopyranoside, luteolin, and quercetin. This is the first report of the isolation of isorhamnetin3-O-(6"O-E-p-coumaroyl)β-D-glucopyranoside from pollen. The free...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Bee pollen; Flavonoids; Melipona rufiventris; Uruçu amarela.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000200003

Evaluating antimicrobial and antioxidant capacity of endemic Phlomis russeliana from Turkey and its antiproliferative effect on Human Caco-2 Cell Lines
Provedor de dados: 42
Autores: ALPAY,MERVE; DULGER,GORKEM; SAHIN,IBRAHIM E.; DULGER,BASARAN.
Abstract: In this study, the antimicrobial, antioxidant and antitumor activity of ethanol extracts obtained from Phlomis russeliana (Sims.) Lag. ex Benth. (Lamiaceae) were evaluated. Disc diffusion and microdilution methods were used to test the extracts for antimicrobial activity against seven bacteria strains (Bacillus cereusATCC 7064, Bacillus subtilisATCC 6633, Staphylococcus aureusATCC 6538P, Escherichia coliATCC 10538, Proteus vulgarisATCC 6899, Salmonella typhimuriumCCM 5445 and Pseudomonas aeruginosaATCC 27853) and four yeast strains (Kluyveromyces fragilisATCC 8608, Rhodotorula rubraATCC 70403, Debaryomyces hanseniiDSM 70238 and Candida albicansATCC 10239). Notably, they were more effective against the yeast strains than the bacterial strains. Of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phlomis russeliana; Antioxidant activity; Cytotoxic effect; Antimicrobial activity; Endemic plant.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500604

Hepatoprotective, cardioprotective, and renal-protective effects of organic and conventional grapevine leaf extracts (Vitis labrusca var. Bordo) on Wistar rat tissues
Provedor de dados: 42
Autores: Oliboni,Lívia S.; Dani,Caroline; Funchal,Cláudia; Henriques,João A.; Salvador,Mirian.
The purpose of this study was to evaluate the beneficial effects of organic and conventional grapevine (Vitis labrusca L.) leaf extracts in reducing hydrogen peroxide-induced stress in the liver, heart and kidney of Wistar rats by measuring lipids and proteins damages (carbonyl assay), as well as the activity of the antioxidant enzymes superoxide dismutase and catalase. The preincubation with 5 mg/mL of organic and conventional grapevine (Vitis labrusca L.) leaf extracts prevented both lipids and proteins oxidative damages in all tissues analyzed. The organic leaf extract was able to restore superoxide dismutase (kidney and liver) and catalase (heart) activities, which were modified by the treatment with H2O2. The conventional extract was able to restore...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Grapevine leaves; Hepatoprotective; Cardioprotective; Renal-protective; Vitis labrusca.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400027

Clusia criuva Cambess. (Clusiaceae): anatomical characterization, chemical prospecting and antioxidant activity
Provedor de dados: 42
Autores: SILVA,KARLA M.M. DA; NÓBREGA,ANDREA B. DA; LESSA,BRUNO; ANHOLETI,MARIA CAROLINA; LOBÃO,ADRIANA Q.; VALVERDE,ALESSANDRA L.; PAIVA,SELMA R. DE; JOFFILY,ANA.
ABSTRACT This study aims the anatomical description and chemical characterization of aerial parts of Clusia criuva Cambess., Clusiaceae in addition to the evaluation of the antioxidant activity of crude extracts, correlated to the flavonoid content. The morphological characterization was performed using traditional techniques of plant anatomy. For phytochemical studies, crude extracts were obtained by static maceration and analyzed by thin layer chromatography. The antioxidant activity and the flavonoids content were determined by colorimetric methods involving, respectively, 2,2-diphenyl-1-picrylhydrazyl free radical and aluminum chloride. C. criuva has uniseriate epidermis, paracytic stomata, hypostomatic leaves, cuticular flanges and cordiform vascular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Morphoanatomy; Antioxidant activity; Chemical prospecting; Clusia criuva; Clusiaceae; Flavonoids.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401565

Chemical composition, antioxidant and antibacterial activities of essential oils from leaves and flowers of Eugenia klotzschiana Berg (Myrtaceae)
Provedor de dados: 42
Autores: CARNEIRO,NÁRGELLA S.; ALVES,CASSIA C.F.; ALVES,JOSÉ M.; EGEA,MARIANA B.; MARTINS,CARLOS H.G.; SILVA,THAYNÁ S.; BRETANHA,LIZANDRA C.; BALLESTE,MAIRA P.; MICKE,GUSTAVO A.; SILVEIRA,EDUARDO V.; MIRANDA,MAYKER L.D.
ABSTRACT Many essential oils (EOs) of different plant species possess interesting antimicrobial effects on buccal bacteria and antioxidant properties. Eugenia klotzschiana Berg (pêra-do-cerrado, in Portuguese) is a species of Myrtaceae with restricted distribution in the Cerrado. The essential oils were extracted through the hydrodistillation technique using a modified Clevenger apparatus (2 hours) and chemically characterized by GC-MS. The major compounds were α-copaene (10.6 %) found in oil from leaves in natura, β-bisabolene (17.4 %) in the essential oil from dry leaves and α-(E)-bergamotene (29.9 %) in oil from flowers. The antioxidant activity of essential oils showed similarities in both methods under analysis (DPPH and ABTS˙+) and the results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Antibacterial activity; Brazilian pear; Drying; Eugenia klotzschiana; Sesquiterpenes.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401907

Effect of carbon source on production, characterization and bioactivity of exopolysaccharide produced by Phellinus vaninii Ljup
Provedor de dados: 42
Autores: XU,CHUNPING; YU,JINWEI; ZHAO,SHANSHAN; WU,SHUNGSHUNG; HE,PEIXIN; JIA,XUEWEI; LIU,YANQI; MAO,DUOBIN.
ABSTRACT The effect on different three carbon source (i.e. glucose, fructose and sucrose) on production, chemical characterization and antioxidant activity of exopolysaccharide (EPS) produced by Phellinus vaninii Ljup was investigated in this study. Amongst carbon sources examined, glucose and sucrose were favorable for the mycelia growth, while the maximum EPS yield was achieved when sucrose was employed. The predominant carbohydrate compositions in EPSs identified were gluconic acid, glucose, mannose and galactose acid. Then, FT-IR spectral analysis revealed prominent characteristic groups in EPSs. EPSs molecule exist as nearly globular shape form in aqueous solution. The variation also affects antioxidant activities by investigated by using hydroxyl and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phellinus vaninii Ljup; Exopolysaccharide; Carbon source; Antioxidant activity; Composition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502033

Fatty acid composition from the marine red algae Pterocladiella capillacea (S. G. Gmelin) Santelices &amp;amp; Hommersand 1997 and Osmundaria obtusiloba (C. Agardh) R. E. Norris 1991 and its antioxidant activity
Provedor de dados: 42
Autores: ALENCAR,DANIEL B. DE; DINIZ,JAÉCIO C.; ROCHA,SIMONE A.S.; PIRES-CAVALCANTE,KELMA M.S.; LIMA,REBECA L. DE; SOUSA,KAROLINA C. DE; FREITAS,JEFFERSON O.; BEZERRA,RAYSSA M.; BARACHO,BÁRBARA M.; SAMPAIO,ALEXANDRE H.; VIANA,FRANCISCO A.; SAKER-SAMPAIO,SILVANA.
ABSTRACT This study evaluated the chemical composition and antioxidant activity of fatty acids from the marine red algae Pterocladiella capillacea (S. G. Gmelin) Santelices &amp; Hommersand 1997 and Osmundaria obtusiloba (C. Agardh) R. E. Norris 1991. The gas chromatography mass spectrometry (GC-MS) identified nine fatty acids in the two species. The major fatty acids of P. capillacea and O. obtusiloba were palmitic acid, oleic acid, arachidonic acid and eicosapentaenoic acid. The DPPH radical scavenging capacity of fatty acids was moderate ranging from 25.90% to 29.97%. Fatty acids from P. capillacea (31.18%) had a moderate ferrous ions chelating activity (FIC), while in O. obtusiloba (17.17%), was weak. The ferric reducing antioxidant power (FRAP) of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fatty acids; Antioxidant activity; Palmitic acid; Rhodophyta.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100449

Evaluation of Chemical Constituents and Antioxidant Activity of Coconut Water (Cocus nucifera L.) and Caffeic Acid in Cell Culture
Provedor de dados: 42
Autores: SANTOS,JOãO L.A.; BISPO,VANDERSON S.; B.C. FILHO,ADRIANO; PINTO,ISABELLA F.D.; DANTAS,LUCAS S.; VASCONCELOS,DAIANE F.; ABREU,FABíULA F.; MELO,DANILO A.; MATOS,ISAAC A.; FREITAS,FLORêNCIO P.; GOMES,OSMAR F.; MEDEIROS,MARISA H.G.; MATOS,HUMBERTO R.
Coconut water contains several uncharacterized substances and is widely used in the human consumption. In this paper we detected and quantified ascorbic acid and caffeic acid and total phenolics in several varieties of coconut using HPLS-MS-MS (25.8 ± 0.6 µg-mL and 1.078 ± 0.013 µg-mL and 99.7 µg-mL, respectively, in the green dwarf coconut water, or 10 mg and 539 µg and 39.8 mg for units of coconut consumed, 500 ± 50 mL). The antioxidant potential of four coconut varieties (green dwarf, yellow dwarf, red dwarf and yellow Malaysian) was compared with two industrialized coconut waters and the lyophilized water of the green dwarf variety. All varieties were effective in scavenging the DPPH radical (IC50=73 µL) and oxide nitric (0.1 mL with an IP of 29.9%) as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Ascorbic acid; Caffeic acid; Cocos nucifera; Polyphenols.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401235

Evaluation of the antimicrobial and antioxidant activity of 7-hydroxy-4’, 6-dimethoxy-isoflavone and essential oil from Myroxylon peruiferum L.f
Provedor de dados: 42
Autores: PEREIRA,RAFAEL; PEREIRA,ANNA L.; FERREIRA,MARCILIO M.; FONTENELLE,RAQUEL O.S.; SAKER-SAMPAIO,SILVANA; SANTOS,HÉLCIO S.; BANDEIRA,PAULO N.; VASCONCELOS,MAYRON A.; QUEIROZ,JOSÉ A.N.; BRAZ-FILHO,RAIMUNDO; TEIXEIRA,EDSON H.
Abstract: This study evaluated the antibacterial, antifungal, and antioxidant effect of 7-hydroxy-4’,6-dimethoxy-isoflavone and essential oil of Myroxylon peruiferum. The compound was isolated and its structure elucidated by NMR. The chemical composition of essential oil determined by GC-MS analysis. To evaluation of antimicrobial activity, the Minimum Inhibitory Concentration (MIC), Minimum Bactericidal Concentration (MBC) and Minimum Fungicidal Concentration (MFC) were performed. In addition to analysis of antioxidant activity, DPPH radical scavenging tests, iron chelating assay (FIC), antioxidant reducing power assay (FRAP) and β-carotene bleaching assay (BCB) were performed. For the essential oil were identified 24 organized compounds having as main...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Antioxidant activity; Essential oil; Isoflavone; Myroxylon peruiferum.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300602

Phytochemical and antioxidant studies of Laurera benguelensis growing in Thailand
Provedor de dados: 48
Autores: Manojlovic,Nedeljko T; Vasiljevic,Perica J; Gritsanapan,Wandee; Supabphol,Roongtawan; Manojlovic,Ivana.
The aim of this study was to investigate metabolites of the lichen Laurera benguelensis. A high-performance liquid chromatographic (HPLC) method has been developed for the characterization of xanthones and anthraquinones in extracts of this lichen. Lichexanthone, secalonic acid D, norlichexanthon, parietin, emodin, teloschistin and citreorosein were detected in the lichen samples, which were collected from two places in Thailand. Components of the lichen were identifed by relative retention time and spectral data. This is the frst time that a detailed phytochemical analysis of the lichen L. benguelensis was reported and this paper has chemotaxonomic signifcance because very little has been published on the secondary metabolites present in Laurera species....
Tipo: Journal article
Palavras-chave: Anthraquinones; Antioxidant activity; Laurera benguelensis; Xanthones.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000200004

Free Radical Scavenging Profile and Myeloperoxidase Inhibition of Extracts from Antidiabetic Plants: Bauhinia forficata and Cissus sicyoides
Provedor de dados: 48
Autores: KHALIL,NAJEH M; PEPATO,MARIA T; BRUNETTI,IGUATEMY L.
There is abundant evidence that reactive oxygen species are implicated in several physiological and pathological processes. To protect biological targets from oxidative damage, antioxidants must react with radicáis and other reactive species faster than biological substrates do. The aim of the present study was to determine the in vitro antioxidant activity of aqueous extracts from leaves of Bauhinia forficata Link (Fabaceae - Caesalpinioideae) and Cissus sicyoides L. (Vitaceae) (two medicinal plants used popularly in the control of diabetes mellitus), using several different assay systems, namely, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) decolorization, superoxide anión radical (0(2)•-) scavenging and myeloperoxidase (MPO) activity....
Tipo: Journal article
Palavras-chave: ABTS decolorization assay; Antioxidant activity; Superoxide anión scavenging activity.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000200006

Lipids, proteins, phenolic composition, antioxidant and antibacterial activities of seeds of peanuts (Arachis hypogaea l) cultivated in Tunisia
Provedor de dados: 48
Autores: Sebei,Khaled; Gnouma,Asma; Herchi,Wahid; Sakouhi,Faouzi; Boukhchina,Sadok.
Fatty acid composition of peanut seed oil in four varieties cultivated in Tunisia showed that linoleic (C18:2), oleic (C18:1) and palmitic (C16) acids account for more than 84% for Chounfakhi and Massriya and for more than 85% of the total fatty acids of Trabilsia and Sinya seed oil respectively. Seed oil contents were significantly different (P &amp;#8804; 0.05) and did not exceed 48%. The study of total phenolics revealed that Chounfakhi contained more total phenolics (2.1 mg GAE/g DW), followed by the Massriya and Sinya cultivars (1.35 mg GAE/g DW for each); Trabilsia presented the lowest total phenolic content with 1 mg GAE/g DW. Considerable antiradical ability was found, especially in the Trabilsia peanut seed cultivar (IC50 = 1550 &amp;#956;g/ml),...
Tipo: Journal article
Palavras-chave: Arachis hypogea; Oil; Sterols; Phenols; Antioxidant activity; Antibacterial activity.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000300006

Antioxidant activity of extract from Polygonum aviculare L.
Provedor de dados: 48
Autores: HSU,CHIN-YUAN.
Free radicals induce numerous diseases by lipid peroxidation, protein peroxidation, and DNA damage. It has been reported that numerous plant extracts have antioxidant activities to scavenge free radicals. Whether Polygonum aviculare L. (Polygonaceae) has antioxidant activity is unknown. In this study, dried Polygonum aviculare L. was extracted by ethanol, and the extract was lyophilized. The antioxidant activities of extract powder were examined by free radical scavenging assays, superoxide radical scavenging assays, lipid peroxidation assays and hydroxyl radical-induced DNA strand scission assays. The results show that the IC50 value of Polygonum aviculare L. extract is 50 µg/ml in free radical scavenging assays, 0.8 µg/ml in superoxide radical scavenging...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Free radical; Phenolics; Lipid peroxidation; DNA damage Polygonum aviculare L.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200010

Evaluation of seasonal antioxidant activity and total phenolic compounds in stems and leaves of some almond (Prunus amygdalus L.) varieties
Provedor de dados: 48
Autores: Sivaci,Aysel; Duman,Sevcan.
BACKGROUND: This study aimed to determine the seasonal changes of total antioxidant activity and phenolic compounds in samples taken from leaves (April, July, October) and stems (April, July, October, January) of some almond (Prunus amygdalus L.) varieties (Nonpareil, Ferragnes and Texas). RESULTS: It was indicated that antioxidant activity and phenolic compounds in leaves and stems of Nonpareil, Ferragnes and Texas showed seasonal differences. Antioxidant activity IC50 of these varieties reached the highest value in April for leaves whereas in October for stems. The highest level of total phenolic compounds was in January for stems while in October for leaves. CONCLUSIONS: These results showed that total antioxidant activity and phenolics in leaves and...
Tipo: Journal article
Palavras-chave: Almond; Antioxidant activity; Phenolics; Prunus amygdalus; Seasonal changes.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100009

Antioxidant activity of extract from Polygonum cuspidatum
Provedor de dados: 48
Autores: HSU,CHIN-YUAN; CHAN,YU-PEI; CHANG,JELI.
Numerous diseases are induced by free radicals via lipid peroxidation, protein peroxidation and DNA damage. It has been known that a variety of plant extracts have antioxidant activities to scavenge free radicals. Whether Polygonum cuspidatum Sieb. et Zuce has antioxidant activity is unknown. In this study, dried roots of Polygonum cuspidatum were extracted by ethanol and the extract was lyophilized. Free radical scavenging assays, superoxide radical scavenging assays, lipid peroxidation assays and hydroxyl radical-induced DNA strand scission assays were employed to study antioxidant activities. The results indicate that the IC50 value oí Polygonum cuspidatum extract is 110 µg/ml in free radical scavenging assays, 3.2 µg/ml in superoxide radical scavenging...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Free radicals; Phenolics; Lipid peroxidation; DNA damage Polygonum cuspidatum.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000100002

Light spectrum on the quality of fruits of physalis species in subtropical area
Provedor de dados: 53
Autores: Silva,Daniel Fernandes da; Pio,Rafael; Soares,Joyce Dória Rodrigues; Elias,Heloisa Helena de Siqueira; Villa,Fabiola; Vilas Boas,Eduardo Valério de Barros.
ABSTRACT The aim of this study was to analyze the effect of colored-shade nets on the physicochemical characteristics of physalis in subtropical area. The experimental design was the randomized blocks with a 4 × 5 factorial, being four species of physalis (Physalis peruviana, P. pubescens, P. minima and P. ixocarpa) and four net colors (white, blue, red and black), besides the control under full sun. Titratable acidity (TA), pH, vitamin C, soluble solids (SS), SS/TA relation, total phenolics, anthocyanins and antioxidant capacity were evaluated. It was observed that P. peruviana and P. pubescens have more acid fruits, and P. minima shows vitamin C content higher than the other species. In general, fruits of P. peruviana and P. pubescens have better quality...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physalis L.; Postharvest quality; Bioactive compound; Antioxidant activity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300371

Free radical scavenging activity of ethanolic extracts from herbs and spices commercialized in Brazil
Provedor de dados: 52
Autores: Mariutti,Lilian Regina Barros; Barreto,Gisela Pizarro de Mattos; Bragagnolo,Neura; Mercadante,Adriana Zerlotti.
Ethanolic extracts from 23 different dried herbs and spices commercialized in Brazil were investigated for their free radical scavenging properties using the stable free radicals 2,2'-diphenyl-β-picrylhydrazyl (DPPH•) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS•+), and Trolox as reference (TEAC) for both radicals. The kinetic curves for both radicals showed to follow the first order kinetics model and the decay rate constant (k obs) was calculated. For all the samples, the two methods showed a good linear TEAC correlation, indicating that the average reactivity of the compounds present in the ethanolic extracts was similar. Sage and rosemary extracts showed the highest free radical scavenging capacities, while onion showed negligible...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Free radical scavenging activity; DPPH; ABTS; Herbs; Spices; Colorifico.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600018

Antioxidant potential of tomatoes cultivated in organic and conventional systems
Provedor de dados: 52
Autores: Borguini,Renata Galhardo; Bastos,Deborah Helena Markowicz; Moita-Neto,José Machado; Capasso,Fernanda Sobral; Torres,Elizabeth Aparecida Ferraz da Silva.
The objective of the study was to compare the effect of organic and conventional cultivation on the antioxidant compound content and antioxidant activity of the Carmen tomato cultivar. Tomatoes were analyzed regarding ascorbic acid, phenolic compounds, lycopene content and antioxidant activity. Organic tomatoes presented higher content of ascorbic acid and total phenolics (641.39 and 4466.66 mg/100 g EAG on dry wt basis) than did the conventional tomatoes (510.16 and 3477.50 mg/100 g EAG on wt dry basis, respectively). There was no difference in lycopene concentrations between the organic and conventional. The ether, alcohol and aqueous extracts obtained from the tomatoes were subjected to the DPPH test and the β-carotene/linoleic acid system assay. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Ascorbic acid; Lycopene; Phenolic compounds.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000400001

LED Lights Enhance Metabolites and Antioxidants in Chinese Cabbage and Kale
Provedor de dados: 52
Autores: Lee,Min Ki; Arasu,Mariadhas Valan; Park,Suhyoung; Byeon,Dong Hae; Chung,Sun-Ok; Park,Sang Un; Yong-,PyoLim; Sun-,JuKim.
Light emitting diode (LED) lights play an important role in the plant physiology and alter the metabolites in a significant manner. Glucosinolates (GSLs), polyphenols, flavonoids and antioxidant properties of Chinese cabbage and kale cultivated in varying LED lights were investigated. Analysis revealed 7 aliphatic, 3 indolyl and 1 aromatic GSLs in Chinese cabbage and kale. The total GSL content ranged from 1.5-19.08 and 1.85-24.87 µmol/g DW, and glucobrassicanapin was the predominant GSL (3) in Chinese cabbage, whereas; sinigrin (3.49 µmol/g DW) was in kale. Blue and red LED lights produced significantly higher amount of GSLs in Chinese cabbage and kale respectively. Results revealed higher amount of total polyphenol (3.845 µg/mL) and total flavanoids...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chinese cabbage; Kale; Glucosinolates; Polyphenols; Flavanoids; Antioxidant activity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100601

Analysis of Maceaene and Macamide Contents of Petroleum Ether Extract of Black, Yellow, and Purple Lepidium Meyenii (Maca) and Their Antioxidant Effect on Diabetes Mellitus Rat Model
Provedor de dados: 52
Autores: Qiu,Congyang; Zhu,Tonglin; Lan,Liying; Zeng,Qingmao; Du,Zhiguo.
ABSTRACT Maceaene and macamide contents as well as antioxidant effect of petroleum ether extract of black maca (BM), yellow maca (YM), and purple maca (PM) on diabetes mellitus (DM) rats were investigated. The results showed that seven, six, and five analogues of macamides were identified from the petroleum ether extracts of BM, YM, and PM, respectively. BM extract exhibited the highest contents of total macamides. Comparatively, the PM extract has the lowest macamide quantity. The maceaene contents in all the extracts showed no significant difference (p&gt;0.05). Macamide contents in maca with the same color were not statistically different. Pharmacological results showed that 60-day oral administration of the petroleum ether extract of maca (100 mg/kg.d)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maca extract; Antioxidant activity; Maceaene; Macamide; Diabetes mellitus rat.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100326

Bioactive Compounds and Antioxidant Activity in Leaves of Endemic and Native Isatis spp in Turkey
Provedor de dados: 52
Autores: Comlekcioglu,Nazan.
Abstract This study was undertaken to evaluate the health-promoting potentials of Isatis aucherii, Isatis buschiana, Isatis candolleana, Isatis tinctoria subsp. corymbosa and Isatis tinctoria. I. aucherii and I. candolleana are endemic, I. buschiana, I. tinctoria subsp. corymbosa are native in Turkey. While I. tinctoria is a well studied species, there is insufficient information about other endemic and native species. Therefore, this study is focused to reveal the bioactive compounds of poorly studied endemic and native species. In this context, protein, ash, glucosinolates, fatty acids, total phenolic and flavonoid content, and antioxidant activities were determined in leaf extracts. The highest protein and fatty oil contents were observed in I....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Fatty acids; Flavonoid; Glucosinolate; Isatis; Phenolic.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100411

Total Phenolic Contents and Antioxidant Activity in Oxidized Leaves of Mate (Ilex paraguariensis St. Hil)
Provedor de dados: 52
Autores: Molin,Rochele Fernanda; Dartora,Nessana; Borges,Ana Cláudia Piovezan; Gonçalves,Itamar Luís; Di Luccio,Marco; Valduga,Alice Teresa.
Ilex paraguariensis is a native species to South America. Its economic importance is in the use of its leaves and twigs in the processing of a product popularly known as "chimarrão". The aim of this study was to evaluate the correlations between some physico-chemical process parameters in the oxidation of I. paraguariensis leaves oxidation. The leaves of Maté with age 1.0, 6.5 and 12.0 months were subjected to an oxidation process for 3 h under different relative humidity conditions (80, 90 and 99%) at 26°C. The extracts were evaluated using the experimental design techniques to maximize the oxidation conditions for the total polyphenols, antioxidant capacity, water activity and color. The condition of 90% humidity and leaf age 6.5 months resulted in lower...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yerba-mate; Oxidative process; Physicochemical parameters; Antioxidant activity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000600997

In vitro cytotoxic, genotoxic and antioxidant/oxidant effects of guaiazulene on human lymphocytes
Provedor de dados: 52
Autores: Toğar,Başak; Çelik,Kübra; Türkez,Hasan.
The aim of this study was to evaluate for the cytotoxicity, genotoxicity and antioxidant/oxidant activity of GYZ on human peripheral blood lymphocytes (PBLs). Guaiazulene (GYZ) was added into culture tubes at various concentrations (0-400 µg/mL-1). Cytotoxicity against the human lymphocytes cultures was examined by lactate dehydrogenase (LDH) release assay. The proliferative response was estimated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay. Antioxidant/oxidant activity was evaluated by measuring the total oxidant status (TOS) and total antioxidant capacity (TAC) levels. Micronucleus (MN) and chromosomal aberration (CA) tests were used in genotoxicity studies. The results showed that GYZ caused cytotoxicity in the PBLs at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Guaiazulene; Cytotoxicity; Genotoxicity; Antioxidant activity; Oxidant status.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000100061

Physicochemical Characterization, Antioxidant Potential and Sensory Quality of Wine from Wild Edible Fruits of Flacourtia montana J. Graham
Provedor de dados: 52
Autores: Mundaragi,Abhishek; Thangadurai,Devarajan; Appaiah,Konerira Aiyappa Anu; Dandin,Chethan Jambanna; Sangeetha,Jeyabalan.
Abstract The objective of the present study was to produce wine from wild edible fruits of Flacourtia montana J. Graham. The various physicochemical attributes including total phenolic content and total flavonoid content were analyzed. Further, the prepared wine was evaluated for the antioxidant potential using four different assays, viz., 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS), 1,1-diphenyl-2-picrylhydrazyl (DPPH), reducing power assay and total antioxidant activity. Finally, the wine was subjected for the sensory evaluation. Experimental results revealed that wine had an alcohol content of 7.20%, total phenolic content of 0.776±0.032 mg GAE/ml and total flavonoids of 0.121±0.012 mg QE/ml. High performance liquid chromatography...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flacourtia montana; Underutilized fruit; Fruit wine; Polyphenols; Antioxidant activity; Sensory evaluation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100507

Antibiofilm, Antioxidant, Antimutagenic Activities and Phenolic Compounds of Allium orientale BOISS.
Provedor de dados: 52
Autores: Ceylan,Ozgur; Alıc,Halime.
ABSTRACT This is the first study to investigate the antibiofilm, antioxidant and antimutagenic activities and phenolic compounds of Allium orientale. Antimicrobial activity of ethanolic extracts of A. orientale was determined by a broth microdilution method. Antibiofilm activity was evaluated by microplate biofilm assay. The antioxidant activity was determined using three complementary assays; namely, DPPH scavenging, β-carotene-linoleic acid, and total phenolic compounds assays. Phenolic compounds were evaluated by reverse-phase high-performance liquid chromatography. The antimutagenic effect of extracts was analyzed by the Ames test. In RP-HPLC analysis, (+)-catechin, apigenin and caffeic acid were identified as major phenolic compounds in the aerial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium orientale; Antibiofilm activity; Antimutagenic activity; Antioxidant activity; Phenolic compounds.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000600935

Chemical Composition and Antioxidant Activity of Essential Oil and Organic Extracts of Premna integrifolia Linn
Provedor de dados: 52
Autores: Al-Reza,Sharif M.; Rokonuzzaman,M.; Afroz,Monira; Hussain,Md. Iqbal; Rashid,M. A.; Rahman,Atiqur.
ABSTRACT This study was designed to examine the chemical composition and in vitro antioxidant activity of the hydrodistillated essential oil and various extracts obtained from Premna integrifolia Linn. GC-MS analysis of the essential oil was resulted in determination 29 different compounds, representing 95.73% of total oil. Antioxidant activities of the essential oil and organic extracts of chloroform, ethyl acetate and methanol were determined by three different test systems namely DPPH (2,2-diphenyl-1-picrylhydrazyl), superoxide and nitric oxide radical scavenging assays. The essential oil and methanol extract showed potent antioxidant activity among all the tested samples. Furthermore, the amount of total phenolic compounds was determined and its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Premna integrifolia Linn; Antioxidant activity; Essential oil; Total phenolics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100203

Elicitation Enhanced the Production of Phenolic Compounds and Biological Activities in Hairy Root Cultures of Bitter melon ( Momordica charantia L.)
Provedor de dados: 52
Autores: Chung,Ill-Min; Thiruvengadam,Muthu; Rekha,Kaliyaperumal; Rajakumar,Govindasamy.
ABSTRACT Momordica charantia (Cucurbitaceae) is an important vegetable and also medicinal crop which produces the bioactive compounds for various biological activities with potential uses in human health. The present investigation relates to elicitors of jasmonic acid (JA) and salicylic acid (SA) to enhance biomass accumulation and phenolic compound production in hairy root cultures of M. charantia. Hairy root cultures were elicited with JA and SA at 0, 25, 50 and 100 μM concentrations respectively. The adding of elicitation to the hairy root cultures on the 15th day of culture and the roots were harvested on day 25. Cultures supplemented with 100 μM JA and SA enhanced the phenolic compounds significantly compared to that of non-elicited hairy root...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anticancer activity; Antioxidant activity; Antimicrobial activity; Elicitation; Hairy root cultures; Phenolic compounds.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100430

Antioxidant and stabilization activity of a quercetin-containing flavonoid extract obtained from Bulgarian Sophora japonica L.
Provedor de dados: 52
Autores: Mihaylova,Dasha; Schalow,Sebastian.
This work aimed to study the antioxidant activity of a quercetin-containing flavonoid extract (FQЕ) obtained from Sophora japonica L. flower buds rich in quercetin (91.6%). Radical scavenging activity was analyzed towards the synthetic radicals DPPH• and ABTS•+ and antioxidant activity was evaluated applying the method of oxygen consumption in a model system containing methyl linoleate. Model food systems of lard and sunflower oil were explored by the application of Rancimat method and chicken as a real food system was investigated by the thiobarbituric acid test. Results showed a high radical scavenging activity and antioxidant capacity of QFE similar to those of the pure flavonoid quercetin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sophora japonica L.; Antioxidant activity; Stabilization activity; Rancimat method.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000300011

In Silico Target Identification and Validation for Antioxidant and Anti-inflammatory Activity of Selective Phytochemicals.
Provedor de dados: 52
Autores: Rana,Shikha; Dixit,Savita; Mittal,Alok.
Abstract Phytochemicals present in plant extract include a number of biological active compounds which have shown promising antioxidant and anti-inflammatory activities in many animal studies. Present knowledge about the biochemical interactions of these compounds present in phytochemical extracts and target enzymes or proteins responsible for antioxidant and anti-inflammatory activity is limited. Present work is an attempt to identify and validate possible biological targets as enzymes or proteins involved in these targeted studies using molecular docking as computational method. IMPPAT: Indian Medicinal Plants, Photochemistry and Therapeutics (a curated database) has been used to retrieve various phytochemicals derived from selected plants which includes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Target identification and validation; Phytochemicals; Antioxidant activity; Anti-inflammatory activity; Molecular docking.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100431

Phenolic profile and antioxidant activity from peels and seeds of melon (Cucumis melo L. var. reticulatus) and their antiproliferative effect in cancer cells
Provedor de dados: 56
Autores: Rolim,P.M.; Fidelis,G.P.; Padilha,C.E.A.; Santos,E.S.; Rocha,H.A.O.; Macedo,G.R.
Melon (Cucumis melo L.) has high economic value and in recent years, its production has increased; however, part of the fruit is wasted. Usually, inedible parts such as peel and seeds are discarded during processing and consumption. Extracts of melon residues were prepared and their phenolic compounds, antioxidants and antiproliferative activities were evaluated. Total phenolic compounds were found in hydroethanolic, hydromethanolic, and aqueous extracts, especially for melon peel (1.016 mg gallic acid equivalent/100 g). Flavonoids total content found for melon peel aqueous extract was 262 µg of catechin equivalent (CA)/100 g. In all extracts of melon peel significant amounts of gallic acid, catechin, and eugenol were found. For total antioxidant capacity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melon residues; Antioxidant activity; Cancer cells; Free radical scavenging activity; Metal chelator; Cytotoxicity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000400607

Antioxidant and free radical scavenging effects in extracts of the medicinal herb Achyrocline satureioides (Lam.) DC. ("marcela")
Provedor de dados: 56
Autores: Desmarchelier,C.; Coussio,J.; Ciccia,G.
Achyrocline satureioides (Lam.) DC. (Compositae) is a medicinal herb used in Argentina, Uruguay, Brazil and Paraguay for its choleretic, antispasmodic and hepatoprotective properties. The presence of the flavonoid quercetin and its derivatives, and of different phenolic acids such as caffeic, chlorogenic and isochlorogenic acids in the aerial parts of this plant has led us to study the antioxidant activity of its extracts using different bioassays. The inhibition of luminol-enhanced chemiluminescence by the aqueous and methanolic extracts was used to show that their total reactive antioxidant potential index (TRAP; in µM Trolox equivalents) was 91.0 ± 15.4 and 128.1 ± 20.1 µM, respectively, while the total antioxidant reactivity index (TAR) was calculated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Achyrocline satureioides; Antioxidant activity; Luminol-enhanced chemiluminescence; Thiobarbituric acid-reactive substances; Hydroperoxide-initiated chemiluminescence; Lipid peroxidation; DNA damage; Reactive oxygen species.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000900010

Improved antimelanogenesis and antioxidant effects of polysaccharide from Cuscuta chinensis Lam seeds after enzymatic hydrolysis
Provedor de dados: 56
Autores: Liu,Zi-Jun; Wang,Ya-Lan; Li,Qi-Ling; Yang,Liu.
Cuscuta chinensis polysaccharide (CPS) was extracted using hot water and enzymatically hydrolyzed C. chinensis polysaccharide (ECPS) was produced by the mannase enzymatic hydrolysis process. The purpose of this research was to investigate the antimelanogenic activity of ECPS and CPS in B16F10 melanoma cells. The in vitro antioxidant activity was assessed by their ferric iron reducing power and DPPH free radical scavenging activities. The molecular mass distribution of polysaccharides was determined using SEC-MALLS-RI. CPS was successfully enzymatically degraded using mannase and the weighted average molecular weights of CPS and ECPS were 434.6 kDa and 211.7 kDa. The results of biological activity assays suggested that the enzymatically hydrolyzed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cuscuta chinensis polysaccharide; Antimelanogenic activity; Enzymatic hydrolysis polysaccharide; Antioxidant activity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000700611

Inhibition of lipid peroxidation and iron (II)-dependent DNA damage by extracts of Pothomorphe peltata (L.) Miq
Provedor de dados: 56
Leaves of Pothomorphe peltata (L.) Miq. (Piperaceae) are used locally as anti-inflammatory, antipyretic, hepatoprotective and diuretic infusions and to treat external ulcers and local infections in several parts of the Peruvian, Bolivian and Brazilian Amazon region. The antioxidant activity of different extracts of P. peltata was studied using the hydroperoxide-initiated chemiluminescence assay in liver homogenates, and the methanolic extract was found to have the highest antioxidant activity, with an IC50 = 4 µg/ml. Aqueous and dichloromethane extracts did not show antioxidant activity. The extracts were further evaluated using the thiobarbituric acid-reactive substances (TBARS) assay. Finally, an assay of DNA sugar damage induced by Fe (II) salt was used...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Pothomorphe peltata; Antioxidant activity; Hydroperoxide-initiated chemiluminescence; Thiobarbituric acid-reactive substances; DNA-binding activity; Lipid peroxidation.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000100014

Antioxidant and antimicrobial activities of Bauhinia racemosa L. stem bark
Provedor de dados: 56
Autores: Kumar,R.S.; Sivakumar,T.; Sunderam,R.S.; Gupta,M.; Mazumdar,U.K.; Gomathi,P.; Rajeshwar,Y.; Saravanan,S.; Kumar,M.S.; Murugesh,K.; Kumar,K.A.
The present study was carried out to evaluate the antioxidant and antimicrobial activities of a methanol extract of Bauhinia racemosa (MEBR) (Caesalpiniaceae) stem bark in various systems. 1,1-Diphenyl-2-picryl-hydrazyl (DPPH) radical, superoxide anion radical, nitric oxide radical, and hydroxyl radical scavenging assays were carried out to evaluate the antioxidant potential of the extract. The antioxidant activity of the methanol extract increased in a concentration-dependent manner. About 50, 100, 250, and 500 µg MEBR inhibited the peroxidation of a linoleic acid emulsion by 62.43, 67.21, 71.04, and 76.83%, respectively. Similarly, the effect of MEBR on reducing power increased in a concentration-dependent manner. In DPPH radical scavenging assays the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bauhinia racemosa; Antioxidant activity; Lipid peroxidation; Scavenging superoxide; DPPH assay; Antimicrobial activity.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700004

Antioxidant and antimicrobial activities of bitter and sweet apricot (Prunus armeniaca L.) kernels
Provedor de dados: 56
Autores: Yiğit,D.; Yiğit,N.; Mavi,A.
Abstract &lt;img border=0 id="_x0000_i1034" src="../img/back.gif"&gt; The present study describes the in vitro antimicrobial and antioxidant activity of methanol and water extracts of sweet and bitter apricot (Prunus armeniaca L.) kernels. The antioxidant properties of apricot kernels were evaluated by determining radical scavenging power, lipid peroxidation inhibition activity and total phenol content measured with a DPPH test, the thiocyanate method and the Folin method, respectively. In contrast to extracts of the bitter kernels, both the water and methanol extracts of sweet kernels have antioxidant potential. The highest percent inhibition of lipid peroxidation (69%) and total phenolic content (7.9 ± 0.2 µg/mL) were detected in the methanol extract of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apricot (Prunus armeniaca L.) kernels; Antioxidant activity; Antimicrobial activity; Total phenolic compounds.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000400006

Antitrichomonal and antioxidant activities of Dorstenia barteri and Dorstenia convexa
Provedor de dados: 56
Autores: Omisore,N.O.A.; Adewunmi,C.O.; Iwalewa,E.O.; Ngadjui,B.T.; Adenowo,T.K.; Abegaz,B.M.; Ojewole,J.A.; Watchueng,J.
Dorstenia barteri and D. convexa extracts and some isolated components of the former were investigated for effectiveness against Trichomonas gallinarum and compared with quercetin and quercitrin. The antioxidant activity of the extracts/compounds was also determined. The minimum lethal concentrations (MLCs) for the extract of D. barteri leaves and twigs at 24 h were found to be 15.625 and 15.625 µg/ml, respectively. However, the MLCs of the leaf and twig extract of D. convexa were 125 and 437.5 µg/ml, respectively. The prenylated and geranylated chalcones were as active as the prenylated flavones, 6-prenylapigenin and the diprenylated derivative 6,8-diprenyleridictyol. The order of the antitrichomonal activity of the compounds at 24 h was: quercetin (0.121...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dorstenia species; Antitrichomonal; Antioxidant activity; Prenylated flavonoids.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700012

Evaluation of some pharmacological activities of Budmunchiamine - A isolated from Albizia amara
Provedor de dados: 58
Autores: Thippeswamy,Sreerangegowda; Mohana,Devihalli Chikkaiah; Abhishek,Rayasandra Umesh; Manjunath,Kiragandur.
The present investigations were aimed to evaluate the antimicrobial and antioxidant efficacies of budmunchiamine-A (BUA) of Albizia amara. The activity-guided isolation leaded to isolate the bioactive compound budmunchiamine-A from alkaloid extract of A. amara. The budmunchiamine-A showed significant broad-spectrum antimicrobial activity with zone of inhibition (ZOI), minimum inhibitory concentration (MIC) and minimum bactericidal/fungicidal concentration (MBC/MFC) values varied from 7.3 to 24.5 mm, 0.95 to 62.5 μg/mL, and 1.9 to 250 μg/mL, respectively. The budmunchiamine-A exhibited moderate antioxidant activity with inhibitory concentration 50% (IC50) value of 400 μg/mL in 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and percent inhibition of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Albizia amara; Budmunchiamine-A; Antimicrobial activity; Antioxidant activity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100139

Extraction and in vitro antioxidant activity of exopolysaccharide by Pleurotus eryngii SI-02
Provedor de dados: 58
Autores: Sun,Xinyi; Hao,Long; Ma,Hua; Li,Tong; Zheng,Lan; Ma,Zhao; Zhai,Guoyin; Wang,Liqin; Gao,Shanglong; Liu,Xiaonan; Jia,Mengshi; Jia,Le.
The extraction parameters for Pleurotus eryngii SI-02 exopolysaccharide (EPS) produced during submerged culture were optimized using response surface methodology (RSM). The optimum conditions for EPS extraction were predicted to be, precipitation time 20.24 h, ethanol concentration 89.62% and pH 8.17, and EPS production was estimated at 7.27 g/L. The actual yield of EPS under these conditions was 7.21 g/L. The in vitro antioxidant results of the EPS showed that the inhibition effects of EPS at a dosage of 400 mg/L on hydroxyl, superoxide anion and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals were 59.63 ± 3.72%, 38.69 ± 2.59%, and 66.36 ± 4.42%, respectively, which were 12.74 ± 1.03%, 8.01 ± 0.56%, and 12.19 ± 1.05% higher than that of butylated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pleurotus eryngii SI-02; Exopolysaccharide; Extraction; Antioxidant activity; In vitro.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400009

Antioxidant activity of Agaricus brasiliensis basidiocarps on different maturation phases
Provedor de dados: 58
Autores: Mourão,Francielly; Umeo,Suzana Harue; Takemura,Orlando Seiko; Linde,Giani Andrea; Colauto,Nelson Barros.
Different maturation phases of basidiocarp could affect the bioactivity and concentration of some active substances. A. brasiliensis Wasser et al.(A. blazei Murrill) has shown antitumor activity that could be related to the antioxidant activity. However there is no information of the best basidiocarp maturation phase for extracting antioxidant substances in order to determine the moment of harvesting in mushroom cultivation. The objective of this work was to evaluate the antioxidant activity of A. brasiliensis strains on different basidiocarp maturation phases. The best condition for extraction of A. brasiliensis antioxidants is with methanol as solvent at 60 ºC for 60 min. Strains with closed basidiocarp have higher antioxidant activity than with opened...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Absorbance; Antioxidant activity; Basidiomycete; Agaricus blazei; DPPH.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100024

Antibacterial and Antioxidant Activities of Acid and Bile Resistant Strains of Lactobacillus fermentum Isolated from Miang
Provedor de dados: 58
Autores: Klayraung,Srikanjana; Okonogi,Siriporn.
Miang is a kind of traditional fermented tea leaves, widely consumed in northern Thailand as a snack. It contains several kinds of Lactobacilli spp. The aim of this study was to isolate strains of Lactobacillus fermentum from miang and to investigate their antibacterial and antioxidant activities. The agar spot and well assays were used for determination of antibacterial power. The antibacterial mechanism was investigated by cell morphologic change under scanning electron microscope (SEM). Antioxidant activity was studied by means of free radical scavenging and ferric reducing power assays. The acid and bile screening tests indicated that L. fermentum FTL2311 and L. fermentum FTL10BR presented antibacterial activity against several pathogenic bacteria:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactobacillus fermentum; Miang; Bile resistance; Antibacterial activity; Antioxidant activity.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000400005

Nephroprotective activity of the enriched polyphenol extract of Euterpe edulis Martius
Provedor de dados: 60
Autores: Cardoso,Priscylla Maria Martins; Mazuco,Renata Alves; Macedo,Lucas Soares Dazzi; Polese,Ariele Abreu Venturini; Barroso,Maria Eduarda de Souza; Baratella,Waléria Gramilich; Andrade,Tadeu Uggere de; Lenz,Dominik; Pereira,Thiago de Melo Costa; Endringer,Denise Coutinho.
Contrast-induced nephropathy (NIC) is directly related to increased morbidity and mortality, and its treatment and prevention might be achieved by the administration of antioxidant products. The juçara palmetto (Euterpe edulis Martius) has fruits rich in phenolic compounds, which are known for their antioxidant activity. This work aimed to evaluate the nephroprotective activity of E. edulis pulp in the NIC animal model. The collected fruits were pulped, their contents of polyphenols and anthocyanins were quantified, and their antioxidant activity were evaluated. The nephroprotective effects were determined based on iodine contrast induction and evaluated by biochemical and histological analyses. The results showed that E. edulis pulp was rich in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nephroprotection; Euterpe edulis Martius; Polyphenols; Anthocyanins; Antioxidant activity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100522

Antioxidant and cytotoxic properties of protein hydrolysates obtained from enzymatic hydrolysis of Klunzinger’s mullet (Liza klunzingeri) muscle
Provedor de dados: 60
Autores: Rabiei,Sana; Rezaei,Masoud; Asgharzade,Samira; Nikoo,Mehdi; Rafieia-kopai,Mahmoud.
Today, consumers are looking for functional foods that promote health and prevent certain diseases in addition to provide nutritional requirements. This study aimed to evaluate the antioxidant and cytotoxic properties of Liza klunzingeri protein hydrolysates. Fish protein hydrolysates (FPHs) were prepared from L. klunzingeri muscle using enzymatic hydrolysis with papain at enzyme/substrate ratios of 1:25 and 1:50 for 45, 90 and 180 min. The antioxidant activities of the FPHs were investigated through five antioxidant assays. The cytotoxic effects on 4T1 carcinoma cell line were also evaluated. The amino acid composition and molecular weight distribution of the hydrolysate with the highest antioxidant activity were determined by HPLC. All six FPHs exhibited...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Cytotoxic effect; Protein hydrolysate; Liza klunzingeri.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100569

Characterization and optimization of oil microcapsules from Attalea phalerata Mart. for the preservation of bioactive compounds
Provedor de dados: 60
Autores: Lima,Fernando Freitas de; Lescano,Caroline Honaiser; Oliveira,Elaine Florinda Rodrigues de; Fakhouri,Farayde Matta; Moraes,Izabel Cristina Freitas; Kassuya,Cândida Aparecida Leite; Sanjinez-Argandoña,Eliana Janet.
This study aimed microencapsulating Attalea phalerata Mart. oil, containing high carotenoid and phenolic compounds content, with Arabic gum and gelatin, using the complex coacervation method. The yield, efficiency, morphology of microcapsules and content of phenolic compounds, carotenoids and antioxidant activity in different processes conditions (concentration of the filling, temperature and agitation speed) were evaluated. The results showed 88% of yield, efficiency up to 70% and a characteristic size of microcapsules. The amount of carotenoids was high in crude oil (394.84 µg of carotenoids/g oil) and the microencapsulation tests showed amounts of 19.19 to 166.40 µg of carotenoids/g oil. The phenolic compounds in the crude oil were 20.73 mg GAE/g sample...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carotenoids; Phenolic compounds; Antioxidant activity; Bioactive compounds; Bioactive maintenance.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100580

Influence of preparation procedures on the phenolic content, antioxidant and antidiabetic activities of green and black teas
Provedor de dados: 60
Autores: Almeida,Tânia Santos de; Araújo,Maria Eduarda Machado; Rodríguez,Lucía González; Júlio,Ana; Mendes,Beatriz Garcia; Santos,Rui Miguel Borges dos; Simões,José Artur Martinho.
The influence of common tea preparation procedures (temperature, infusion time, consumption time interval and tea bag/loose-leaf) and the type of water used, on the total phenolic content (TPC), the radical scavenging activity and the α-glucosidase inhibitory activity were assessed. Higher TPC and antioxidant activity were obtained when using lower mineralized waters. Tea bags also evidenced higher antioxidant activity than loose-leaf samples. Under the same conditions (90 ºC and five minutes of infusion time) green tea contains almost twice the quantity of polyphenols and the free radical scavenging ability of black tea. In the α-glucosidase assay all infusions were active (97-100 %). Furthermore, HPLC allowed to identify some of the polyphenols present...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Black tea; Green tea; Antioxidant activity; Α-Glucosidase activity; Water mineralization.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100529

Antioxidant, antimicrobial and phytotoxic activities of Rhaponticum acaule DC. essential oil
Provedor de dados: 60
Autores: Mosbah,Habib; Sassi,Ahlem Ben; Chahdoura,Hassiba; Snoussi,Mejdi; Flamini,Guido; Achour,Lotfi; Selmi,Boulbaba.
The in-vitro antioxidant activity of Rhaponticum acaule essential oil (RaEO) was evaluated using β-carotene/linoleic acid bleaching, chelating activity, and lipid peroxidation inhibition (TBARS) assays. The antimicrobial activity of RaEO was assessed by disc diffusion and microdilution methods against 8 bacteria and 4 yeast. Finally, the allelopathic activity of RaEO on the seed germination and the shoot and root elongation of lettuce (Lactuca sativa L.) seedlings were investigated. According to our results, the RaEO exhibited significant antioxidant activity, similar to those of standards (BHT and ascorbic acid) with IC50 values of 0.042 and 0.045 mg/mL obtained by β-carotene bleaching and TBARS assays, respectively. On the other hand, despite its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhaponticum acaule essential oil; Antioxidant activity; Antimicrobial activity; Allelopathic activity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100611

Chemical composition, antioxidant and biological activity of Ocotea bicolor Vattimo-Gil (LAURACEAE) essential oil
Provedor de dados: 60
Autores: Damasceno,Carolina Sette Barbosa; Oliveira,Letícia Freire de; Szabo,Ellis Marina; Souza,Ângela Maria; Dias,Josiane Fatima Gaspari; Miguel,Marilis Dalarmi; Miguel,Obdúlio Gomes.
ABSTRACT The essential oil composition of the Ocotea bicolor, native plant of Brazil, was studied for the first time. The essential oil of the leaf was obtained by hydrodistillation and analyzed by GC/MS. The analytical procedure revealed a predominance of sesquiterpenes, δ-cadinene (7.39%), β-sesquiphellandrene (6.67%), β-elemene (5.41%) and α-cadinol (5,23%). The essential oil was submitted to brine shrimp toxicity evaluation, antioxidant and antibacterial tests. The antioxidant activity by the formation of phosphomolybdenum complex method presented positive results. The minimum inhibitory concentration (MIC) values were higher than 1000 μg/mL for the microorganisms tested. Toxicity activity revealed LC50 results of 40.10 (μg/mL), being toxic to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ocotea bicolor/Oil essential/chemical composition; Lauraceae; Antioxidant activity; Biological activity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000400615

Influence of contrasting environments on seed composition of two quinoa genotypes: nutritional and functional properties
Provedor de dados: 117
Autores: Miranda,Margarita; Vega-Gálvez,Antonio; Martínez,Enrique A; López,Jéssica; Marín,Rosa; Aranda,Mario; Fuentes,Francisco.
Quinoa (Chenopodium quinoa Willd.) in Chile represents a source of germplasm with high nutritional value. However, there is little information available related to quinoa seed quality grown under contrasting environments. In this study we evaluated the changes on seed composition of seeds of two lowland/coastal quinoa genotypes grown under arid (Vicuna) and cold-temperate (Temuco) conditions in Chile. Results showed that in the case of 'Regalona Baer' and 'Villarrica' genotypes the arid location (with irrigation) led to a significant increase (P &lt; 0.05) in grain yield (4.2 and 5.1 t ha-1, respectively), soluble dietary fiber (16.8 ± 0.4 and 28.9 ± 2.1 g kg-1 DM, respectively), vitamin B3 (2.44 ± 0.005 and 2.26 ± 0.04 mg 100 g-1 DM, respectively),...
Tipo: Journal article
Palavras-chave: Chenopodium quinoa; Climate stress; Antioxidant activity; Phenolic compounds; Protein; Mineral content.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000200004

Improving meat quality through natural antioxidants
Provedor de dados: 117
Autores: Velasco,Valeria; Williams,Pamela.
Nowadays, consumers are demanding more natural foods, obliging the industry to include natural antioxidants in foods. Natural antioxidants have been used instead of synthetic antioxidants to retard lipid oxidation in foods to improve their quality and nutritional value. This review discusses some aspects of recent research on antioxidant activity of plant extracts and natural compounds to improve meat quality. Many herbs, spices, and their extracts have been reported as having high antioxidant capacity, such as some plants of the Lamiaceae family, e.g., oregano (Origanum vulgare L.), rosemary (Rosmarinus officinalis L.), and sage (Salvia officinalis L.). The antioxidant activity of these plants is attributed to their phenolic compound content, which...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Essential oils; Phenolic compounds; Meat quality.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200017

Identification of proanthocyanidins extracted from Pinus radiata D. Don bark
Provedor de dados: 118
Autores: Cortés,Soledad; Pulgar,Hugo; Sanhueza,Verónica; Aspé,Estrella; Fernández,Katherina.
The bark of Pinus radiata D. Don is recognized as a rich natural source of proanthocyanidins (PAs). Barks of Pinus radiata D. Don were extracted to produce a raw extract, and then purified to produce 4 fractions, with the aim of correlating its structural characteristics with the extract antioxidant capacity. The structural characterization was performed by acid catalysis in presence of phloroglucinol, foliowed by the detection of the components by High Precision Liquid Chromatography (HPLC). The subunits identified in the bark of Pinus radiata were: epicatechin- (4ß-2) - phloroglucinol (EC-P), catechin- (4á-2) - phloroglucinol (C-F) and (+) -catechin (C). The purified fractions showed different mean degree of polymerization (mDP), average molecular weight...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Bark; Pinus radiata; Tannins.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200002

Beverages formulated with whey protein and added lutein
Provedor de dados: 65
Autores: Rocha,Juliana de Cássia Gomes; Mendonça,Adriana Corrêa; Viana,Kéllen Wanessa Coutinho; Maia,Mariza de Paiva; Carvalho,Antônio Fernandes de; Minim,Valéria Paula Rodrigues; Stringheta,Paulo César.
ABSTRACT: This study aimed to develop and characterize beverages formulated with whey protein and added lutein. Beverages formulated with 0.5 (F1), 2.0 (F2), 4.0 (F3) and 6.0% w/v (F4) whey protein were physicochemically and microbiologically characterized, and sensory evaluated. The physicochemical analyses indicated that the protein content significantly changed (P&lt;0.05) the acidity values, soluble solids and the colorimetric coordinates, making possible to adjust mathematical models for all these variables. Microbiological analyses showed no significant contamination (P&lt;0.05) during processing that would compromise drinks quality of the drinks. Carotenoid content and the antioxidant activity did not change significantly (p&gt;0.05) with increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Lutein; Proteins; Protein drink; Sensory acceptance; Whey.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300752

Potential of Baccharis alnifolia Meyen &amp;amp; Walpan (Chilka) from northern Chile used as a medicinal infusion
Provedor de dados: 65
Autores: Soto,Emilio; Bustos,Luis; Simirgiotis,Mario Juan; Parra,Claudio.
ABSTRACT:  Baccharis alnifolia Meyen &amp; Walp. is a native and medicinal, Chilean Altiplano herb that is used as a poultice and also consumed as an infusion to relieve inflammation. This study evaluated the antioxidant and cytotoxic effect of the ethanolic extract of B. alnifolia and their infusion. It was reported that the ethanol extract contains 4.42 mg GAE/g of dry weight and the infusion contains 35.86 mg GAE/L of total polyphenols. Also, it determined the antioxidant capacity using Ferric reducing antioxidant power (FRAP), Oxygen Radical Absorbance Capacity (ORAC) and Trolox equivalent antioxidant capacity (TEAC) assay. Moreover, seven metabolites including between phenolic acids and flavonoids were identified for the first time in both extracts of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Baccharis alnifolia; Bioactivity; Medicinal plant; UHPLC-DAD.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001000401

Agro-industrial wastes as sources of bioactive compounds for food and fermentation industries
Provedor de dados: 65
Autores: Shirahigue,Ligianne Din; Ceccato-Antonini,Sandra Regina.
ABSTRACT: Agro-industrial wastes are of great interest because they are important natural sources of bioactive compounds and can generate value-added byproducts. Recent studies have shown that byproducts generated by the food processing industry are rich in bioactive compounds, such as phenolic compounds, organic acids, and carotenoids, among others. The growing interest in replacing synthetic antioxidant and antimicrobial compounds with natural ones has stimulated a search for these bioactive compounds from plant sources, especially from fruit-processing wastes. The study aims to project the agro-industrial wastes as potential natural sources of antioxidants and antimicrobials and the feasible technological applications in food and fermentation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Antioxidant activity; Antimicrobial activity; Agro-industrial waste.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400754

Oxygen introduction during extraction and the improvement of antioxidant activity of essential oils of basil, lemon and lemongrass
Provedor de dados: 65
Autores: Ferreira,Daniele de Freitas; Nora,Flávia Michelon Dalla; Lucas,Bruna Nichelle; Menezes,Cristiano Ragagnin de; Cichoski,Alexandre José; Giacomelli,Sandro Rogério; Wagner,Roger; Barin,Juliano Smanioto.
ABSTRACT: Essential oil extraction is commonly carried out by using the hydrodistillation method, which is described in official compendia of food quality control and medicinal plants. Despite the widespread use of this method, few studies have evaluated the effect of the atmosphere change during extraction on the composition and antioxidant activity of essentials oils. Therefore, a study of oxygen introduction influence during the extraction of essential oils from basil, lemongrass and lemon by hydrodistillation was performed. Total amount of oxygenated compounds (e.g., linalool, camphor, α-terpineol, neral, geranial, eugenol and α-muurolol) increased for all essential oils extracted under oxygen flow. Antioxidant activity evaluated by using the ORAC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Chromatography; ORAC; Volatile oil.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000800752

Antioxidant properties, quantification and stability of betalains from pitaya (Hylocereus undatus) peel
Provedor de dados: 65
Autores: Mello,Fernanda Robert de; Bernardo,Claudia; Dias,Caroline Odebrecht; Gonzaga,Luciano; Amante,Edna Regina; Fett,Roseane; Candido,Lys Mary Bileski.
Pitaya peel can be used as a raw material for betalains extraction. The aim of this research was to quantify phenolic compounds, antioxidant activity and betalains on pitaya peel. Furthermore, evaluate the betalains stability against various pH conditions and exposure time of heating. The results showed that pitaya peel contains phenolic compounds and presented antioxidant activity. Moreover it showed high concentration of betalains (101.04mg equivalent to betanin. 100g-1) which were stable over a wide pH range (3.2 - 7.0) and were resistant to heating (100oC) up to 10 minutes at pH range from 3.7 to 5.5. Therefore, pitaya peel is a promising source of betalains which can be applied as a natural colorant for food.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Betalains; Antioxidant activity; Colorant; Phenolic compounds.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200323

Carotenoids, sugars, ascorbic acid, total phenolics, and antioxidant activity of murici from Brazilian Cerrado during refrigerated storage
Provedor de dados: 65
Autores: Belisário,Celso Martins; Soares,Antônio Gomes; Coneglian,Regina Celi Cavestré; Plácido,Geovana Rocha; Castro,Carlos Frederico de Souza; Rodrigues,Lamonier Antônio Nery.
ABSTRACT: Native fruits are economically important to small producers, and they are a important part of the diet of several communities. Therefore, postharvest studies of these fruits are essential. In addition, research involving their chemical composition can identify substances that add potential value to the fruits, especially from a nutritional and medicinal standpoint. This study characterized the fruits of the muricizeiro shrub (Byrsonima crassifolia, Malpighiaceae), which were harvested from native plants on private properties and stored for 16 days at a mean temperature of 12 °C. The fruits were evaluated during storage for: 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ascorbic acid content, phenolics and carotenoids total,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Postharvest; Native fruits; Byrsonima crassifolia; Malpighiaceae; Antioxidant activity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400751

Enzymatic hydrolysis (pepsin) assisted by ultrasound in the functional Properties of hydrolyzates from different collagens
Provedor de dados: 65
Autores: Vidal,Alessandra Roseline; Cechin,Carine da Fonseca; Cansian,Rogério Luis; Mello,Renius de Oliveira; Schmidt,Michele Mantelli; Demiate,Ivo Mottin; Kempka,Aniela Pinto; Dornelles,Rosa Cristina Prestes.
ABSTRACT: Enzymatic hydrolysis (pepsin) assisted with or without ultrasound in the functional properties of hydrolyzates from different collagens were analyzed. Degree of hydrolysis, antioxidant activity (DPPH) and antimicrobial activity (MIC) were assessed. The treatment that resulted in greater antioxidant activity for the fiber sample was with the use of 4% of enzyme and concomitant ultrasound (40.7%), leading to a degree of hydrolysis of 21.7%. For the powdered fiber sample the hydrolysis treatment with use of 4% of enzyme resulted in lower protein content (6.97mg/mL), higher degree of hydrolysis (19.9%) and greater antioxidant activity (38.6%). The hydrolyzates showed inhibitory capacity against gram-negative bacteria Salmonella choleraesuis and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pepsin; Degree of hydrolysis; Antioxidant activity; Antimicrobial activity; Ultrasound.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000300752

Nutritional and antioxidant potential of canjiqueira fruits affected by maturity stage and thermal processing
Provedor de dados: 65
Autores: Prates,Mariana Ferreira Oliveira; Campos,Raquel Pires; Silva,Michelly Morais Barbosa da; Macedo,Maria Lígia Rodrigues; Hiane,Priscila Aiko; Ramos Filho,Manoel Mendes.
The effect of jelly processing on the chemical properties, nutrients, antinutritional factors, bioactive compounds, and antioxidant activity of unripe and ripe canjiqueira fruits was evaluated. The fruits were collected from Pantanal regions at two different ripening stages and were used to produce jellies. The processing affected the chemical characteristics and the content of all nutrients, except for the lipids. Moisture and protein content reduced, whereas the energy value increased. The phytic acid found in fresh fruits was eliminated after processing, and the trypsin inhibitors were reduced, especially in ripe fruits. Lectin activity was not verified in unripe and ripe fruits and jellies. The levels of bioactive compounds were reduced after jelly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Byrsonima cydoniifolia A. Juss.; Jelly; Antioxidant activity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000300399

Mycorrhization and saline stress response in Hyptis suaveolens
Provedor de dados: 65
Autores: Souza,Marília Cristina Gomes de; Morais,Marciana Bizerra de; Andrade,Marcelo da Silva; Vasconcelos,Mayron Alves de; Sampaio,Silvana Saker; Albuquerque,Cynthia Cavalcanti de.
ABSTRACT: The objective of this study was to evaluate the physiological and biochemical mechanisms of adaptation of Hyptis suaveolens under osmotic stress due to salinity inoculations with a mycorrhizal fungal species. H. suaveolens seeds were germinated in polyethylene pots containing a substrate associated with or without arbuscular mycorrhizal fungi (AMF). After plant formation, treatments were treated with different salt concentrations (0.0, 35, 70, and 105 mM) and fungi (control and two types of AMF), totaling 12 treatments with three replicates. The experimental design used randomized blocks in a 4 x 3 factorial scheme, totaling 12 treatments with three replicates each. Salinity affected all measured physiological and biochemical variables, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Abiotic stress; Salinity; Arbuscular mycorrhizal fungi.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000600402

Blackberry (Rubus spp.): influence of ripening and processing on levels of phenolic compounds and antioxidant activity of the 'Brazos' and 'Tupy' varieties grown in Brazil
Provedor de dados: 65
Autores: Zielinski,Acácio Antonio Ferreira; Goltz,Caroline; Yamato,Maira Akemi Casagrande; Ávila,Suelen; Hirooka,Elisa Yoko; Wosiacki,Gilvan; Nogueira,Alessandro; Demiate,Ivo Mottin.
Fruits from temperate and tropical climates which have high levels of antioxidant compounds are the source of numerous studies concerning the correlation with benefits to human health. The objectives of this study were to quantify the anthocyanins and phenolic compounds and also to measure the antioxidant activity (ferric reducing antioxidant power - FRAP) of blackberries from two varieties grown in southern Brazil ('Brazos' and 'Tupy') at three stages of ripening; unripe, semi-ripe, ripe and their products (pulp and fermented products). During fruit ripening it was observed that weight, size, diameter and sugars increase significantly and acidity decreased significantly. The anthocyanin content ranged from 4.19 (semi-ripe 'Tupy' variety) to 205.75mg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rubus spp.; Antioxidant activity; Ripening stage; Processing.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000400744

Lemon balm and sage herbal teas: Quantity and infusion time on the benefit of the content
Provedor de dados: 64
Autores: Yaman,Cennet.
ABSTRACT Sage (Salvia officinalis L.) and lemon balm (Melissa officinalis L) are important medicinal plants and their infusions (herbal teas) are the most common form of these plants consumed. In this study, herbal teas of both species cultivated and exported in Anatolia region were prepared using different infusion time (5 and 10 min) and sample amount (2 and 3 g). These herbal teas were analysed for their vitamin C, total phenolics, total flavonoids, total flavanols, free radical scavenging activities (1,1-diphenyl-2-picryl-hydrazyl and hydrogen peroxide), and also twelve minerals (K, Na, Mg, Ca, Fe, B, Ti, Sr, Ba, Li, Ag and Ga) were determined in each sage and lemon balm dry leaves as well as their herbal teas. Vitamin C in the herbal teas varied from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Minerals; Vitamin C.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100407

Nutritional and bioactive compounds of adzuki beans cultivars using chemometric approach
Provedor de dados: 64
Autores: Gohara,Aline Kirie; Souza,Aloisio Henrique Pereira de; Gomes,Sandra Terezinha Marques; Souza,Nilson Evelázio de; Visentainer,Jesuí Vergílio; Matsushita,Makoto.
ABSTRACT Azuki beans are small red grains rich in several essential nutrients used in traditional dishes in Asia that, nowadays present many applications around the world. This work aimed at evaluating angularis and niponensis cultivars from south region of Brazil. Both cultivars presented proximal composition similar to literature and the majority fatty acids were 18:2n-6, 16:0 and 18:3n-3. All samples showed polyunsatured fatty acids prevalence and nutritional indices and ratios considered adequate for biological system maintenance of a healthy organism. The grains presented significant contents of tocopherols and vitamin E activity, resulting in a high contribution to the dietary reference intake. Significant contents of iron, manganese and zinc were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna angularis; Alpha-linolenic; Principal component analysis; Vitamin E; Antioxidant activity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000100104

Evaluation of omega-3 fatty acids content and antioxidant activity in wheat (Triticum aestivum L.) leaves
Provedor de dados: 64
Autores: Aguiar,Ana Carolina de; Boroski,Marcela; Bonafé,Elton Gutendorfer; Almeida,Vanessa Vivian de; Souza,Nilson Evelázio de; Visentainer,Jesuí Vergílio.
The objective of this study was to quantify alpha-linolenic acid (LNA, 18:3n-3) of dried wheat leaves, harvested at different development stages (20, 40 and 80 days), to determine the antioxidant potential and the total phenolic compounds of leaves harvested at 80 days, as well as to perform mineral analysis (Na, K, Fe, Ca, Mg, P, Zn, Cu and Mn). It was observed a predominance of polyunsaturated fatty acids (PUFA) compared to saturated fatty acids (SFA) in the lipid fraction of leaves. Leaves collected in all periods presented ratios of PUFA/SFA, omega-6 and omega-3 fatty acids (n-6/n-3) considered suitable for food. The highest content of LNA was found in leaves harvested at 60 days, corresponding to 2.146,72 mg 100 g-1 dried matter. The range time...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alpha-linolenic acid; Phenolic compounds; Antioxidant activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000400012

Color, physicochemical parameters and antioxidant potential of whole grape juices subject to different UV-C radiation doses
Provedor de dados: 64
Autores: Henrique,Paôla de Castro; Boas,Ana Carolina Vilas; Lima,Rafaella Araújo Zambaldi; Decarlos,Antonio Neto; Lima,Luiz Carlos de Oliveira.
ABSTRACT Knowing that moderate stress such as UV radiation can activate defense mechanisms in plants, the use of UV-C radiation appears as hypothesis of a promising technique that would help to stimulate and enhance beneficial compounds for health, through a clean and healthy technology. In this study, the possible induction of secondary metabolism, the increase in the content of phytochemical compounds and physicochemical changes through the use of UV-C radiation were evaluated on whole grape juices produced with Vitis labrusca grapes, cultivar Isabel Precoce. Grapes were harvested, sanitized, exposed to UV-C radiation at doses of 0, 2, 4 and 6 KJ m-2, and then the juices were prepared and packed into amber glass bottles at room temperature. Analyses were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Vitamin C.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200226