Consulta: subjectFacets:"Antioxidant capacity"
Registros recuperados: 35
Data/hora: 06/06/2024 02:17:15

Study of the antioxidant capacity in gills of the Pacific oyster Crassostrea gigas in link with its reproductive investment
Provedor de dados: 5
Autores: Beguel, Jean-philippe; Huvet, Arnaud; Quillien, Virgile; Lambert, Christophe; Fabioux, Caroline.
Energy allocation principle is a core element of life-history theory in which "the cost of reproduction" corresponds to an acceleration of senescence caused by an increase in reproductive investment. In the "theory of aging", senescence is mainly due to the degradation of lipids, proteins and DNA by reactive oxygen species (ROS), by-products of oxidative metabolism. Some studies have shown that oxidative stress susceptibility could be a cost of reproduction. The present study investigates the effect of reproductive investment on antioxidant capacity in the gills of a species with a very high reproductive investment, the Pacific oyster Crassostrea gigas. We used RNA interference targeting the oyster vasa-like gene (Oyvlg) to produce oysters with contrasted...
Tipo: Text
Palavras-chave: Antioxidant capacity; Crassostrea gigas; Reproduction; RNA interference; ROS.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00116/22744/21494.pdf

Antioxidant Capacity and Acute Testicular Toxicity of Leucaena leucocephala Aqueous Shoot Tips Plus Young Leaves Extracts
Provedor de dados: 77
Autores: Burawat,Jaturon; Uabandit,Nongnut; Sripanidkulchai,Bungorn; Nualkaew,Somsak; Iamsaard,Sitthichai.
This study aimed to determine the antioxidant capacity of the Leucaena leucocephala aqueous shoot tips plus young leaves (LL-spl) extracts among three different fractions (LL-spl 10, 20, and 40 min) and to examine its acute toxicity on male reproductive parameters. The amount of the total phenolics in LL-spl extract was determined using a Folin-Ciocalteu reagent method and its antioxidant capacity was analyzed using 1, 1-diphenyl l-2-picrylhydrazyl radical scavenging and ferric reducing antioxidant powder methods. The LL-spl extract fraction with highest antioxidant capacity was used in animal treating. Male rats were divided into three groups (n= 5); control and groups treated with LL-spl 400 and 600 mg/Kg body weight for consecutive 40 days. The results...
Tipo: Journal article
Palavras-chave: Leucaena leucocephala; Shoot tips plus young leaves; Antioxidant capacity; Acute testicular toxicity.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000200018

The Effects of Licorice (Glycyrrhriza glabra) Root on Performance, Some Serum Parameters and Antioxidant Capacity of Laying Hens
Provedor de dados: 89
Autores: Dogan,S Canogullari; Baylan,M; Erdoğan,Z; Küçükgül,A; Bulancak,A.
ABSTRACT The current study was conducted to determine the effects of the licorice root (Glycyrrhriza glabra) in laying hens diets on performance, egg cholesterol, some plasma parameters and antioxidant capacity. One hundred, 40-week old laying hens were divided into four groups, each group consisted of 25 hens and were placed in individual cages. The mean of the initial body weight of laying hens was 1829.18±9.595 g. Commercial laying hen diet was supplemented with 0, 0.5, 1.0 and 2.0% levels of licorice root powder and four different dietary groups were formed. From the experimental findings, it was ascertained that the licorice root supplementation had no significant effect on egg weight and feed conversion ratio (p&gt;0.05), but feed consumption...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant capacity; Egg cholesterol; Glycyrrhriza glabra; Laying hen; Performance; Some plasma parameters.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400699

Improved Antioxidant Capacity and Immune Function of Broiler Chickens Fed with Selenium-enriched Candida utilis
Provedor de dados: 89
Autores: Wang,D; Wang,D; Pu,L; Wei,G.
ABSTRACT The aim of this study was to assess the effect of selenium-enriched Candida utilis with high contents of organic selenium (Se) and glutathione (GSH) on growth performance, antioxidant capacity and immune function of broiler chickens. A total of 100 healthy 7-day-old male broiler chickens were randomly divided into 5 groups, and fed diets supplemented with (a) Na2SeO3, (b) C. utilis, (c) Se-enriched Saccharomyces cerevisiae, (d) Se-enriched C. utilis, and (e) the control without any supplements. The experiment lasted for 6 weeks and parameters were recorded on day 42. No significant differences in average daily gain were found among the 5 groups. However, Se-enriched C. utilis supplemented in the diet increased activities of glutathione peroxidase...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant capacity; Broiler chickens; Glutathione; Immune function; Selenium-enriched Candida utilis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000200314

Characteristics of the fruits of two uvaia populations grown in Salesópolis, SP, Brazil
Provedor de dados: 94
Autores: Silva,Aline Priscilla Gomes da; Tokairin,Tatiane de Oliveira; Alencar,Severino Matias de; Jacomino,Angelo Pedro.
Abstract  Uvaia (Eugenia pyriformis Cambess) is a fruit tree native to the Atlantic Forest and that features peculiar aroma and flavor. Although this fruit is highly popular locally, its commercial farming is virtually nonexistent. In addition, limited studies on this fruit have been conducted. Therefore, the present study aimed to investigate the physical, chemical, and functional characteristics of two uvaia fruit populations grown in Salesópolis, SP, Brazil, in order to determine their potential for being consumed both in natura and processed. Uvaia fruits were evaluated as for skin color, whole fruit weight, longitudinal and transversal diameters, seed percentage, pulp yield, pulp firmness, pH, total soluble solids (TSS), total titratable acidity...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Eugenia pyriformis C.; Mineral and chemical characterizations; Antioxidant capacity; Phenolic compounds; Post-harvest quality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000200905

Cambuci: a native fruit from the Brazilian Atlantic forest showed nutraceutical characteristics
Provedor de dados: 94
Autores: Tokairin,Tatiane de Oliveira; Silva,Aline Priscilla Gomes da; Spricigo,Poliana Cristina; Alencar,Severino Matias de; Jacomino,Angelo Pedro.
Abstract  The Atlantic Forest is recognized as a biome rich in biodiversity. Cambuci trees (Campomanesia phaea) produce fruits that may be consumed as both fresh and processed forms but are still underutilized. The aim of this study was to describe the physicochemical characteristics and bioactive compounds in cambuci fruits from Brazilian Atlantic Forest, located at Natividade da Serra-SP, Brazil. Cambuci fruits of the fifty-nine accessions were characterized according to fresh weight, pulp yield, peel percentage, longitudinal and transversal diameters (LD and TD, respectively), pH, soluble solids content (SSC), titratable acidity (TA), SSC/TA ratio, ascorbic acid, total phenolic compounds content, and antioxidant activity using the DPPH assay. The...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Campomanesia phaea; Postharvest quality; Antioxidant capacity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000500702

Rootstock for the ‘BRS Magna’ grapevine grown in a tropical region affects the quality of the stored juice
Provedor de dados: 124
Autores: Ferreira,Talita de Oliveira; Lima,Arlete de Sousa; Marques,Aline Telles Biasoto; Rybka,Ana Cecília Poloni; Lima,Maria Auxiliadora Coêlho de.
ABSTRACT The ‘BRS Magna’ grapevine has the advantage of adapting to different regions of Brazil and producing juice of good quality. However, it is necessary to define the components of the cropping system, such as the rootstock, for each region. The aim of this study was to characterise the chemical composition and antioxidant capacity of grape juice collected from ‘BRS Magna’ grapevines grown on different rootstock under the tropical conditions of the Sub-middle São Francisco Valley. The grapes were harvested in the Experimental Area of Bebedouro/Embrapa Semiárido, in Petrolina, Pernambuco, Brazil. The treatments corresponded to the ‘IAC 766’, ‘IAC 572’, ‘IAC 313’, ‘Freedom’, ‘Paulsen 1103’, ‘Harmony’ and ‘SO4’ rootstock. The grape juice was prepared...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant capacity; Cropping systems; Hybrid grapes; Tropical viti-viniculture.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300410

In vitro determination of the antioxidant capacity of extracts and phenolic compounds from Ugni molinae Turcz. leaves
Provedor de dados: 98
Autores: Avello Lorca,Marcia; Pastene Navarrete,Edgar; González Riquelme,Margarita; Bittner Berner,Magalis; Becerra Allende,José.
Introduction: Ugni molinae Turcz., (Myrtaceae) is a plant that is distributed in central-southern of Chile, including Juan Fernández Islands. The leaves have been used in folk medicine for diarrhea and oral infections due to their astringent and antiseptic properties. Objective: antioxidant activity of two extracts (ethyl acetate and methanol) from U. molinae leaves was assessed in several assays. Methods: HPLC (high performance liquid chromatography) for chemical analysis and in vitro antioxidant methods. Results: HPLC profiling of both extracts showed the presence of flavan-3-ols (catechin) and gallic acid, flavonoids and caffeic acid derivates as main constituents. These extracts showed significant activity on 2,2-diphenyl-1-picrylhydrazyl (DPPH),...
Tipo: Journal article
Palavras-chave: Antioxidant capacity; Lipid peroxidation; Ugni molinae.
Ano: 2013
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962013000400011

ความสามารถในการต้านออกซิเดชันและปริมาณสารฟีโนลิครวมของเยื่อหุ้มเมล็ดถั่วลิสง
Provedor de dados: 106
Autores: Prasan Swatsitang; Pornnapa Chuendchom; Sanun Jogloy.
Peanut testae or peanut skins are normally discarded as a by-product of peanut processing. Peanut testae contain some beneficial phytochemicals that can show the antioxidant effect  in vitro  and in food. Therefore, the aim of this study was to determine the antioxidant capacity of the peanut testae  of 9 peanut varieties. The average amount of peanut testa was 3.62 ± 0.80 % of whole seed. The average moisture content of peanut testae was 11.00 ± 0.90 %. The methanol extracts of peanut testae exhibited the ability to scavenge both DPPH radical and hydroxyl  radical  in  vitro . The total phenolic contents of peanut testae were 6,267.70 – 10,292.08 mg GAE/100 g, with an  average of 8,554.97 ± 1,264.80 mg GAE/100 g. The total phenolics of peanut testae...
Tipo: Collection
Palavras-chave: Peanut testa; Antioxidant capacity; Total phenolics; ถั่วลิสง; ความสามารถในการต้านออกซิเดชัน; ปริมาณสารฟีโนลิครวม; เยื่อหุ้มเมล็ด; ค่าสัมประสิทธิ์สหสัมพันธ์.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5117

คุณสมบัติในการเสริมสร้างสุขภาพจากข้าวและถั่วของไทย: คุณสมบัติในการเป็นสารต้านอนุมูลอิสระและส่งเสริมการเจริญเติบโตของจุลินทรีย์สุขภาพ
Provedor de dados: 106
Autores: Nipat Limsangouan; Pramuan Saithong; Chulaluck Charunuch; Ngamjit Lowithun; Phisamai Srichayet; Kassamaporn Puntaburt.
Functional properties of eight kinds of rice (Khao Dawk Mali 105 Rice, Khao Tah Haeng  Rice, LeuangPratew Rice, Khao Doi Rice, Purple Rice, Khao Hawm Nin Rice, Sang Yod Rice and Red Hawm Rice) and legume (Black Gram Bean, Mung Bean, Red Kidney Bean, Soybean, Navy Bean, Azuki Bean, Black Soybean and Red Bean) were studied for antioxidant capacity (DPPH radical-scavenging method, ABTS radical cation  decolorization assay, total phenolic and anthocyanins content) and the synergistic effects of probiotic microorganism (Lactobacillus acidophilus, Lactobacillus bulgaricus, Lactobacillus lactis, Lactobacillus casei  and Lactobacillus plantarum) growth (Turbidimetrically, probiotic cell count and resistant starch content).  The result  shown that coloured rice and...
Tipo: PhysicalObject
Palavras-chave: Rice; Legume; Antioxidant capacity; Probiotic; Prebiotic; ข้าว; ถั่ว; ความสามารถในการต้านอนุมูลอิสระ; จุลินทรีย์สุขภาพ; พรีไบโอติก; การเจริญเติบโตของจุลินทรีย์.
Ano: 2009
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5242

Effect of milling process on functional properties of legumes
Provedor de dados: 106
Autores: Nipat Limsangouan; Seiichiro Isobe.
This study demonstrated the effect of milling processing (screw crushing, hammer milling and jet milling) on functional properties, such as antioxidant capacity, total phenolic content and resistant starch content of three legumes (broad beans, black soybeans and green beans). The results showed that broad beans possessed the highest antioxidant capacity and resistant starch content. Black soybeans had the highest total phenolic content. Different milling processes changed the functional properties of samples (p&lt;0.05) depending on the particle size of the flour and the volume of the flush air operation. The grinding process, producing a smaller particle size and lower volume of flush air had higher functional properties than the others processes....
Tipo: PhysicalObject
Palavras-chave: Legume; Milling; Functional properties; Antioxidant capacity; Resistant starch; พืชตระกูลถั่ว; สารต้านอนุมูลอิสระ; กระบวนการบด; คุณสมบัติเชิงหน้าที่; สารต้านอนุมูลอิสระ; สารประกอบฟีนอล.
Ano: 2009
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5142

Phytotoxic and antioxidant activity of seven native fruits of Brazil
Provedor de dados: 39
Autores: Peres,Marize Terezinha Lopes Pereira; Lopes,José Rodrigo Regis; Silva,Cristiane Bezerra da; Cândido,Ana Carina Silva; Simionatto,Euclésio; Cabral,Márcia Regina Pereira; Oliveira,Rita Machado; Facco,Janaina Thomasi; Cardoso,Cláudia Andréa Lima; Simas,Pedro Henrique.
We investigated antioxidant capacity, phenolic content and phytotoxic effects in seven species of fruit native to Brazil: Acrocomia aculeata, Hymenaea stigonocarpa, Tamarindus indica, Byrsonima intermedia, Psidium firmum, Myrciaria cauliflora and Ficus obtusifolia. Phytotoxic effects were assessed from crude ethanol extracts and semipurified fractions. In four of the seven fruits, total phenolic content, as determined by Folin-Ciocalteu assay, was higher in the peel than in the pulp. We found that total phenolic content correlated significantly with antioxidant capacity. High-performance liquid chromatography with diode array detection revealed the presence of the flavonoids quercetin and rutin in some fruits. We also evaluated the allelopathic effects of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Fruit; Phytotoxic effects; Antioxidant capacity; Total phenolic content.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400024

Physicochemical evaluation of cooking and dessert bananas (Musa sp.) varieties
Provedor de dados: 115
Autores: Rosales-Reynoso,O. Lidia; Agama-Acevedo,Edith; Aguirre-Cruz,Andres; Bello-Perez,Luis A.; Dufour,Dominique; Gibert,Olivier.
In México, banana (Musa sp.) varieties ate used for human consumption as well as for traditional medicine, but the literature lacks information on local diversity and functional justification for their use. Three varieties of dessert bananas (Valery, Morado, and Enano) and one cooking banana (Macho) were collected in a commercial farm in Tuxtepec, Oaxaca, México, at the agronomic maturity stage, and they were physically and chemically evaluated. A random sampling, ANOVA, and Tukey tests were used. As compared to the dessert bananas, the cooking banana (Macho) showed a lower number of hands per banana bunch (6) and of fingers per hands (6), one of the smallest bunch yields (about 12.4 kg), a higher average finger weight (349 g), length (31.7 cm), girth (17...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Musa sp.; Starch properties; Polyphenol; Antioxidant capacity.
Ano: 2014
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000400004

Ascorbic acid, phenolic content, and antioxidant capacity of red, cherry, yellow and white types of pitaya cactus fruit (Stenocereus stellatus Riccobono)
Provedor de dados: 115
Autores: Beltrán-Orozco,M. Carmen; Oliva-Coba,Tzatzil G.; Gallardo-Velázquez,Tzayhri; Osorio-Revilla,Guillermo.
In order to sustain the growing interest in the consumption of pitaya cactus (Stenocereus stellatus Riccobono) fruit as potential neutraceutical food, the total phenolics and ascorbic acid contents were determined in four pitaya cactus fruit types (red, cherry, yellow and white). Total phenol and ascorbic acid concentrations were correlated to the antioxidant capacity (fimol Trolox eq g-1 fresh sample). The results showed that the white and yellow types contained a higher amount of phenol compounds and ascorbic acid than the cherry and red types. A linear relationship was found between the fruit antioxidant capacity and the total phenol content (R²=0.97) and ascorbic acid content (R²=0.79), indicating that both of them contribute together to its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stenocereus stellatus Riccobono; Antioxidant capacity; Ascorbic acid; Nutraceutic; Pitaya; Total phenolic content.
Ano: 2009
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952009000200007

Phytochemical analysis and antioxidant capacity ofTabernaemontana catharinensis A. DC. Fruits and branches
Provedor de dados: 42
Autores: PIANA,MARIANA; BOLIGON,ALINE A.; BRUM,THIELE F. DE; ZADRA,MARINA; BELKE,BIANCA V.; FROEDER,AMANDA L.F.; FROHLICH,JANAÍNA K.; NUNES,LETÍCIA T.; PAPPIS,LAUREN; BOLIGON,ALEXANDRA A.; ATHAYDE,MARGARETH L.
The antioxidant capacity of the crude extract and fractions ofTabernaemontana catharinensis fruits and branches, was evaluated by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method and the content of polyphenols, flavonoids, alkaloids and condensed tannins were determined by the spectrophotometric method. The ethyl acetate fraction of the fruits and the n-butanol fraction of the branches showed IC50 of 181.82 µg/mL and 78.19 µg/mL, respectively. All fractions were analyzed by high performance liquid chromatography (HPLC), in the branches were quantified chlorogenic acid in the chloroform (8.96 mg/g), ethyl acetate (4.31 mg/g) and n-butanol (3.33 mg/g) fractions; caffeic acid in the ethyl acetate (5.24 mg/g) and n-butanol (1.81 mg/g); gallic acid (0.52 mg/g)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant capacity; Apocynaceae; Chlorogenic acid; Tabernaemontana catharinensis.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200881

Accumulation of Antioxidants in Apricot Fruit through Ripening: Characterization of a Genotype with Enhanced Functional Properties
Provedor de dados: 48
Autores: Hegedüs,Attila; Pfeiffer,Péter; Papp,Nóra; Abrankó,László; Blázovics,Anna; Pedryc,Andrzej; Stefanovits-Bányai,Éva.
Two apricot genotypes, 'Gonci magyarkajszi' and 'Preventa' were assayed at three ripening stages for flesh color indices (L*, a*, b*, C* and Hº), contents of total phenolics and vitamin C, and both water- and lipid-soluble antioxidant capacities (ferric reducing antioxidant power; 2,2'-diphenyl-1-picrylhydrazyl scavenging activity; total radical scavenging activity; and Photochem lipid-soluble antioxidant capacity) to compare their dynamics in the accumulation of antioxidant compounds and capacities through ripening. The increase in a*, b* and C* and decrease in Hº during ripening represented a color shift from green to yellow and orange due to carotenoid accumulation. Parallel to carotenoid accumulation, contents of total phenolics and vitamin C and...
Tipo: Journal article
Palavras-chave: Antioxidant capacity; Apricot; Color; Ripening; Total polyphenolic content; Vitamin C.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000400004

Compositional studies and Biological activities of Perovskia abrotanoides Kar. oils
Provedor de dados: 48
Autores: Ashraf,Sadaf Naz; Zubair,Muhammad; Rizwan,Komal; Tareen,Rasool Bakhsh; Rasool,Nasir; Zia-Ul-Haq,Muhammad; Ercisli,Sezai.
BACKGROUND: Current study has been designed to evaluate the chemical composition of essential and fixed oils from stem and leaves of Perovskia abrotanoides and antioxidant and antimicrobial activities of these oils. RESULTS: GC-MS analysis of essential oil identified 19 compounds with (E)-9-dodecenal being the major component in stem and hexadecanoic acid in leaves. In contrast, GC-MS analysis of fixed oil showed 40 constituents with &amp;#945;-amyrin the major component in stem and &amp;#945;-copaene in leaves. The antioxidant activity showed the highest value of 76.7% in essential oil from leaves in comparison with fixed oil from stem (45.9%) through inhibition of peroxidation in linoleic acid system. The antimicrobial assay tested on different...
Tipo: Journal article
Palavras-chave: Perovskia abrotanoides; Essential oil; Fixed oil; Antioxidant capacity; Antimicrobial activity.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100012

Polyphenols and Red Wine as Antioxidants against Peroxynitrite and other Oxidants
Provedor de dados: 48
Autores: VALDEZ,LAURA B; ÁLVAREZ,SILVIA; ZAOBORNYJ,TAMARA; BOVERIS,ALBERTO.
The antioxidant capacity of polyphenols (+)-catechin, (-)-epicatechin and myricetin, and of different types of red wines (Cabernet Sauvignon, Malbec and blended wine) was evaluated by three assays. (a) NADH oxidation by peroxynitrite (ONOO-): the ONOO- scavenging activity was higher for myricetin (IC50=35 µM) than for (+)-catechin (IC50=275 µM) and (-)-epicatechin (IC50=313 µM). (b) Peroxynitrite initiated chemiluminescence in rat liver homogenate: (-)-epicatechin (IC50=7.0 µM) and (+)-catechin (IC50=13 µM) were more potent than myricetin (IC50=20 µM) in inhibiting the chemiluminescence signal. (c) Lucigenin chemiluminescence in aortic rings: (-)-epicatechin (IC50=15 µM) and (+)-catechin (IC50=18 µM) showed higher antioxidant capacity than myricetin...
Tipo: Journal article
Palavras-chave: Antioxidant capacity; Peroxynitrite; Polyphenols; Red wines; Superoxide anion.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000200014

Stability of phenolic compounds and antioxidant capacity of regular and decaffeinated coffees
Provedor de dados: 52
Autores: Vicente,Silvio José Valadão; Queiroz,Yara Severino; Gotlieb,Sabina Léa Davidson; Torres,Elizabeth Aparecida Ferraz da Silva.
This study compared the regular and decaffeinated coffees in relation to antioxidant capacity, levels of some antioxidant molecules and stability of these parameters over a six-month period under different storage conditions. The regular coffee samples analyzed right after the industrial production showed higher antioxidant capacity (ORAC and DPPH), the same levels of phenolic compounds and higher levels of phenolic acids than decaffeinated coffee. After six months, the closed packs of both the grades kept under vacuum at 20°C did not show significant changes from the initial results; the open packs stored at 4°C showed small but statistically significant reductions and the open packs stored at 20°C showed higher and statistically significant losses (p...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffee; Antioxidant capacity; Phenolic compounds; Caffeine; ORAC; DPPH.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100016

Eugenia Klotzschiana O. Berg Fruits as New Sources of Nutrients: Determination of their Bioactive Compounds, Antioxidant Activity and Chemical Composition
Provedor de dados: 52
Autores: Carneiro,Nárgella Silva; Alves,Cássia Cristina Fernandes; Cagnin,Caroline; Belisario,Celso Martins; Silva,Marco Antônio Pereira da; Miranda,Mayker Lazaro Dantas; Oliveira Filho,Josemar Gonçalves de; Alves,José Milton; Pereira,Paulo Sérgio; Silva,Fabiano Guimarães; Egea,Mariana Buranelo.
Abstract: The Cerrado is one of the world's biodiversity hotspots and Brazil’s second largest biome. Many native species of the Brazilian Cerrado provide fruits that have unique sensory characteristics and high nutritional value. This study aimed at characterizing the pulp of Eugenia klotzschiana O. Berg, concerning its proximal composition, bioactive compound content and antioxidant activity. The pulp under study had high moisture (89.47 g kg-1) and caloric (96.07 kcal kg-1) values whereas its contents of protein (0.59 g kg-1) and lipids (2.35 g kg-1) were low. The cerrado pear pulp also had high iron content (16.5 mg kg -1) and dietary fiber (6.45 g kg-1), besides 0.034-0,055 mg kg-1 carotenoids, 8.66 mg kg-1 ascorbic acid and 0.66 mg kg-1 total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado pear; Nutrients; Flavonoids; Antioxidant capacity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100402

Evaluation of biomass production, carotenoid level and antioxidant capacity produced by Thermus filiformis using fractional factorial design
Provedor de dados: 58
Autores: Mandelli,Fernanda; Yamashita,Fábio; Pereira,José L.; Mercadante,Adriana Z.
A fractional factorial design 2(5-1) was used to evaluate the effect of temperature, pH, and concentrations of yeast extract, tryptone and Nitsch's trace elements on the biomass, total carotenoids and protection against singlet oxygen by carotenoid extracts of the bacterium Thermus filiformis. In addition, the carotenoid composition was determined by high-performance liquid chromatography connected to a diode array and mass spectrometer detectors (HPLC-DAD-MS/MS). The production of biomass ranged from 0.113 to 0.658 g/L, the total carotenoid from 137.6 to 1,517.4 mg/g and the protection against singlet oxygen from 4.3 to 85.1 %. Results of the fractional factorial design showed that temperature had a negative effect on biomass production and a positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermophile bacterium; Carotenoids; HPLC-DAD-MS/MS; Antioxidant capacity; Factorial design.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100014

Antioxidant capacity of several Iranian, wild and cultivated strains of the button mushroom
Provedor de dados: 58
Autores: Tajalli,Faezeh; Malekzadeh,Khalil; Soltanian,Hadi; Janpoor,Javad; Rezaeian,Sharareh; Pourianfar,Hamid R.
The white button mushroom, Agaricus bisporus, is the most commonly grown mushroom in Iran; however, there is a significant shortage of research on its antioxidant activity and other medicinal properties. The aim of this study was to evaluate antioxidant capacity of the methanolic extracts from four cultivated strains and four Internal Transcribed Spacer (ITS)-identified, Iranian wild isolates of A. bisporus. Evaluations were made for total phenols, flavonoids and anthocyanins, and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity. Overall, results showed that all the wild isolates exhibited significantly lower DPPH-derived EC50, compared to the cultivated strains (p &lt; 0.05). A relatively high relationship was observed between total phenols and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agaricus bisporus; Antioxidant capacity; Wild mushrooms; Methanolic extract; Anthocyanins.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300769

Ocotea nutans (Nees) Mez (Lauraceae): chemical composition, antioxidant capacity and biological properties of essential oil
Provedor de dados: 60
Autores: Betim,Fernando Cesar Martins; Oliveira,Camila Freitas de; Souza,Angela Maria de; Szabo,Ellis Marina; Zanin,Sandra Maria Warumby; Miguel,Obdulio Gomes; Miguel,Marilis Dallarmi; Dias,Josiane de Fátima Gaspari.
The present study was undertaken to assess the potential uses of the essential oil obtained from Ocotea nutans (Nees) Mez. The hydrodistilled essential oil from O. nutans leaves was analyzed by gas chromatography-mass spectrometry. Fifty-eight compounds representing 87,29% of the total leaf essential oil components were identified, of which biciclogermacrene(11.41%), germacrene-D (4.89%), bisabolol-11-ol(3.73%) and spathulenol (3.71%) were the major compounds. The essential oil from O. nutans were tested for antibacterial activity using the minimum inhibitory concentracion (MIC) method, Artemia salina method, larvicidal activity in Aedes aegypti, and antioxidant capacity.The antioxidant activity measured by the phosphomolybdenum complex and Prussian blue...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ocoteanutans/essential oil/evaluation; Antioxidant capacity; Aedesaegypti; Toxic potential.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100513

Anchusa italica extract: phytochemical and neuroprotective evaluation on global cerebral ischemia and reperfusion
Provedor de dados: 60
Autores: Torki,Akram; Khalaji-Pirbalouty,Valiallah; Lorigooini,Zahra; Rafieian-Kopaei,Mahmoud; Sadeghimanesh,Arezo; Rabiei,Zahra.
Abstract Stroke is the third leading cause of mortality and disability in industrial countries. Treatment with herbs with antioxidant properties has been reported to be an alternative to the conventional treatments. This study was conducted to investigate the effect of Anchusa italica extract on hippocampal injury induced by transient global cerebral ischemia and reperfusion in the rat. To do so, 50 rats were randomly assigned to five groups; control, sham, ischemia, and 50 or 100 mg/kg of Anchusa italica treated animals. Ischemia was induced by occlusion of carotid artery for 30 minutes. Afterward, behavioral tests and biochemical analyses were conducted. Induction of ischemia/reperfusion caused a decline in learning and passive avoidance memory in rats....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Boraginaceae/phytochemistry; Brain ischemia; Spatial memory/drug effects; Malondialdehyde/pharmacology; Neuroprotection/drug effects; Lipidic peroxidation/drug effects; Antioxidant capacity; Passive avoidance memory.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000100613

Antioxidant capacity of extracts and isolated compounds from Stryphnodendron obovatum Benth
Provedor de dados: 60
Autores: Zocoler,Analice Martins Daleffi; Sanches,Andréia Cristina Conegero; Albrecht,Ingrid; Mello,João Carlos Palazzo de.
The extract from stem bark of Stryphnodendron obovatum Benth. was chromatographed on a Sephadex® LH-20 column, and yielded nine compounds: gallic acid (GA), p-hydroxybenzoic acid (PHB), gallocatechin (GC), epigallocatechin (EPG), 4'-O-methylgallocatechin (MGC), epigallocatechin-(4β→8)-epigallocatechin (EPEP), epigallocatechin-(4β→8)-gallocatechin (EPGC), robinetinidol-(4α→8)-gallocatechin (ROGC) and robinetinidol-(4β→8)-epigallocatechin (ROEP). Evaluation of the antioxidant capacity in vitro by the methods of DPPH free radical (IC50; μg/mL) and reduction of the phosphomolybdenum complex (RAC) gave the following results, respectively: crude extract 4.52 and 0.8242; ethyl-acetate fraction 4.04 and 0.9537; aqueous fraction 5.58 and 0.9275. The crude extract...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stryphnodendron obovatum; Antioxidant capacity; Condensed tannins; DPPH free radical; Phosphomolybdenum complex.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000300009

Bioactive compounds and antioxidant capacities in the flavedo tissue of two citrus cultivars under low temperature
Provedor de dados: 61
Autores: Mohammadian,Mansour Afshar; Mobrami,Zeinab; Sajedi,Reza Hasan.
Antioxidants production is amongst the physiological responses of plants to protect their tissues from oxidative damages caused by chilling and freezing stresses. Indeed, cold tolerance of plants is related to production of reactive oxygen species (ROS) scavengers to combat oxidative stress. In this study, two citrus cultivars including Citrus sinensis 'Siavaraz' and Citrus limon 'Lisbon' grown at the north of Iran were examined to compare antioxidants changes including total flavonoid, total phenol and total antioxidant capacities (TAC) in the flavedo tissue of the fruits under various low temperature treatments of control (15 ºC), 3, 0, -3 and -6 ºC. The results indicated that total flavonoid content and TAC in Citrus limon 'Lisbon' was significantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant capacity; Citrus; Low temperature treatment.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000300004

Microencapsulation of maqui (Aristotelia chilensis Molina Stuntz) leaf extracts to preserve and control antioxidant properties
Provedor de dados: 117
Autores: Vidal J,Leslie; Avello L,Marcia; Loyola C,Cristina; Campos P,Jorge; Aqueveque M,Pedro; R. Dungan,Stephanie; Galotto L,Maria; Guarda M,Abel.
Microencapsulation technology is an alternative to stabilize stress factors and protect food ingredients or additives, which include environmentally sensitive bioactive principles in protective matrices to increase their functionality and life span. The objective of this research was to study conditions to obtain microcapsules with antioxidant capacity from a maqui (Aristotelia chilensis [Molina] Stuntz, Elaeocarpaceae) leaf extract by emulsification and subsequent retention after microencapsulation. Microcapsules were produced by water-in-oil emulsion (W/O) using a phase of the aqueous maqui leaf extract and gum arabic, and a liquid vaseline phase. Maqui leaf extract antioxidant capacity was 99.66% compared with the aqueous phase of the emulsion at 94.38...
Tipo: Journal article
Palavras-chave: Maqui; Antioxidant capacity; Bioactive compounds; Gum arabic.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000100003

The antioxidant properties of calafate (Berberis microphylla) fruits from four different locations in southern Chile
Provedor de dados: 118
Autores: Mariangel,Emilia; Reyes-Diaz,Marjorie; Lobos,Walter; Bensch,Emma; Schalchli,Heidi; Ibarra,Pamela.
The antioxidant capacity (AC), total anthocyanins (TA) and total phenols (TP) of calafate fruit from four locations in southern Chile (El Blanco, Lonquimay, Mañihuales and Temuco) were determined using both the free radical 2.2-diphenyl-1-picrylhydrazyl (DPPH) method and the linoleic acid oxidation inhibition method as well as the pH-differential and Folin-Ciocalteu methods. Phenolic compounds were also identified using HPLC-DAD (High Performance Liquid Chromatography-Diode-Array Detection). The results showed that TP varied significantly according to the location. Mañihuales was noteworthy, with 34.9 mg of GAE g-1 dried fruit. The measured AC level depended on the methodology used, varying significantly between locations according to the DPPH results....
Tipo: Journal article
Palavras-chave: Antioxidants; Antioxidant capacity; Berberis; Flavonoids; Phenolic acids; Total phenols.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100014

Nutraceutícal quality of cantaloupe melon fruits produced under fertilization wíth organíc nutríent Solutions
Provedor de dados: 118
Autores: Preciado-Rangel,Pablo; García-Villela,Karla M; Fortis-Hernández,Manuel; Trejo Valencia,Radamés; Rueda Puente,Edgar O; Esparza-Rivera,Juan R.
Consumption of fruits and vegetables provides natural antioxidants in the human diet that are capable of preventing diseases resulting from the action of free radicals. The aim of the current study was to evaluate the effect of organic nutrient solutions on the nutraceutical quality of hydroponic cantaloupe melon (Cucumis melo L.) produced under greenhouse conditions. The applied organic solutions consisted of compost and vermicompost teas and vermicompost leachate, while Steiner nutrient solution was used as a control. Analytical tests were run to determine the antioxidant capacity and total phenolic content of the melon fruits. The nutraceutical quality (antioxidant capacity and phenolic content) of the fruits fertilized with the organic solutions was...
Tipo: Journal article
Palavras-chave: Antioxidant capacity; Cucumis melo; Nutraceutical; Organic fertilization.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000300015

Antioxidant properties and color of Hibiscus sabdariffa extracts
Provedor de dados: 118
Autores: Salazar-González,Claudia; Vergara-Balderas,Fidel T; Ortega-Regules,Ana E; Guerrero-Beltrán,José Á.
Liquid extracts of dried Roselle (Hibiscus sabdariffa) calyces obtained using ethanol:water (50:50 and 70:30%, v/v), water, ethanol:1.5 N HCl (85:25%, v/v), and ethanol (96%) to evaluate selected antioxidant characteristics (phenolic compounds and antioxidant capacity), color parameters (L, a, and b), and anthocyanins (delphinidin-3-O-sambubioside, delphinidin-3-O-glucoside (myrtillin), and cyanidin-3-O-sambubioside) by high performance liquid chromatography (HPLC). The total monomeric anthocyanin content was also assessed using the differential pH technique. The phenolic compound content ranged from 1,067±22 (in ethanol) to 2,649±96 (in ethanol:water 70:30%) mg of gallic acid100 g-1 of dehydrated calyces, and the antioxidant capacity ranged from 3.11±0.50...
Tipo: Journal article
Palavras-chave: Anthocyanins; Antioxidant capacity; Cyanidin-3-O-sambubioside; Delphinidin-3-O-sambubioside; Delphinidin-3-O-glucoside; Myrtillin; Hibiscus sabdariffa; Roselle calyces.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100006

Bioactive compounds and quality characteristics of five apples cultivars
Provedor de dados: 65
Autores: Zucoloto,Moises; Ku,Kang-Mo; Kushad,Mosbah M.; Sawwan,Jamal.
The aim of this study was to evaluate bioactive compounds in five apple cultivars and to analyze correlation of their quality characteristics with concentration of bioactive compounds. Phenolic compounds measurements were made in a spectrophotometer compared to a standard curve of gallic acid and expressed as gallic acid equivalent (GAE) per 100g of dry weight. Sugar and organics acids in five cultivars were quantified using high-performance liquid chromatograph (HPLC). Antioxidant activities were evaluated using three complementary tests 2,2-diphenyl-1-picrylhidrazyl (DPPH) scavenging activity, ferric reducing antioxidant power (FRAP), and 2,2'-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS). 'GoldRush' had the highest total phenolic compared to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mallus domestica; Organic acids; Sugar; Antioxidant capacity; HPLC/DAD.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001101972

Cytotoxicity and antioxidant activity of goldenberry extracts obtained with high intensity ultrasound
Provedor de dados: 65
Autores: Codevilla,Cristiane Franco; Tischer,Bruna; Gindri,Amanda Leitão; Nogueira-Librelotto,Daniele Rubert; Barin,Juliano Smanioto; Silva,Cristiane de Bona da; Rolim,Clarice Madalena Bueno; Zepka,Leila Queiroz; Menezes,Cristiano Ragagnin de.
ABSTRACT: The high intensity ultrasound-assisted extraction (HIU) is one of the most simple, quick and efficient techniques for the extraction of phenolic and other antioxidant compounds from plants. This is the first application of HIU for the extraction of these compounds from goldenberry fruit. The HIU and conventional extraction techniques showed similar results regarding to phenolic compounds and antioxidant capacity. However, the time required for HIU extraction (5min) was 24 times lower than conventional extraction (120min). Phenolic compounds reported were chlorogenic acid, caffeic acid and rutin. In vitro cytotoxicity assays were used for evaluation of extracts and the results showed that in a wide range of concentration, the extract maintains...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Goldenberry; Sonication; Antioxidant capacity; Cytotoxicity; High performance liquid chromatography.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200752

Development of a fruit smoothie with solid albumen of green coconut
Provedor de dados: 65
Autores: Teixeira,Nátali Silva; Torrezan,Renata; Freitas-Sá,Daniela De Grandi Castro; Pontes,Sérgio Macedo; Ribeiro,Leilson de Oliveira; Cabral,Lourdes Maria Correa; Matta,Virgínia Martins da.
ABSTRACT:  The present study aimed to develop a mixed smoothie drink using the solid albumen of the green coconut in its composition. Smoothie formulations were prepared following an experimental design, setting the solid albumen concentration at 20% and varying the contents of the acerola (Barbados Cherry), pineapple, and coconut water pulps, which corresponded to 80% of the total mass of the product. Response parameters evaluated were vitamin C content, antioxidant capacity, and overall sensory acceptance. Ten formulations were evaluated. The ones that contained higher concentrations of acerola pulp had higher values ​​of bioactive compounds but were not the most sensorially accepted. By means of the desirability function, a final formulation consisted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Product development; Sensory analysis; Tropical fruits; Antioxidant capacity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000100750

Biochemical and bioactive phytonutrients changes in tissues of two cultivars of fresh-cut cassava in stick form under refrigerated storage
Provedor de dados: 65
Autores: Junqueira,Mateus da Silva; Simões,Adriano do Nascimento; Sediyama,Tocio; Côrrea,Paulo Cesar; Puschmann,Rolf.
The aim of this study was to evaluate the effects of fresh-cut in stick form of two cassava cultivars on their biochemical and antioxidant characteristics, at two harvest times. The fresh cut cassava sticks were packaged in polypropylene, maintained at 5±1ºC, with 90±5% relative humidity for 12 days. The concentration of carotenoids, total soluble phenolic compounds and the activity of phenylalanine ammonia lyase and antioxidant capacity were significantly higher for the sticks of cultivar 'Amarela' cassava than for the sticks of cultivar 'Cacau'. The concentrations of carotenoids, total soluble phenolic compounds, and the activity of phenylalanine ammonia lyase and antioxidant capacity were all significantly greater when harvested at 14-month of age....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Manihot esculenta Crantz; Carotenoids; PAL; Quality; Antioxidant capacity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000701284

Antioxidant capacity and composition of pitanga seeds
Provedor de dados: 65
Autores: Bagetti,Milena; Facco,Elizete Maria Pesamosca; Rodrigues,Daniele Bobrowski; Vizzotto,Márcia; Emanuelli,Tatiana.
Food industry generates a significant amount of seed wastes from the juice production, frozen pulps and jams. Considering that the characterization of wastes is the first step to determine their potential use, the aim of the present study was to determine the composition and the antioxidant capacity of seeds from pitanga fruits with different flesh colors (purple, red and orange). Chemical composition results revealed that pitanga seeds are a good source of insoluble dietary fiber, with low protein and fat levels, and no relevant differences were found among pitanga seeds from different flesh colors. Pitanga seed extracts had powerful antioxidant capacity that was partially correlated to their high phenolic content and showed some variation according to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant capacity; DPPH; FRAP; Eugenia uniflora L.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000800036