Consulta: subjectFacets:"Phenolic compounds"
Registros recuperados: 98
Data/hora: 06/06/2024 03:29:08

Calidad sanitaria en la producción de nopal verdura (Opuntia sp.) en Otumba, México.
Provedor de dados: 32
Autores: Martínez Martínez, Talina Olivia.
La calidad sanitaria en los productos hortofrutícolas debe considerarse una prioridad en la producción de alimentos. Actualmente en México, existe una gran preocupación por las asociaciones de productores y gobierno federal para adoptar sistemas de producción que reduzcan riesgos de contaminación (SRRC). Para la implementación de estos sistemas, es necesario cumplir con una serie de requisitos, entre ellos se encuentra la validación de procesos. Un método inmediato para efectuar este requerimiento, es la evaluación de la calidad sanitaria desde el punto de vista microbiológico y toxicológico, lo que hace necesario determinar un plan de muestreo y las técnicas apropiadas para la detección y cuantificación de patógenos indicadores. Con este propósito, en...
Palavras-chave: Salmonella; Escherichia coli; Pesticides; Phenolic compounds; Survival; Sample size; Entomología y Acarología; Doctorado.
Ano: 2011
URL: http://hdl.handle.net/10521/590

Calidad microbiológica y organoléptica de vainilla (Vainilla planifolia Jacks) beneficiada artesanalmente.
Provedor de dados: 32
Autores: López López, Daniela.
La vainilla (Vanilla planifolia Jacks) es un recurso fitogenético originario de México, el fruto llamado vaina, tiene que ser beneficiado para ser consumido. En este trabajo se evaluó la calidad microbiológica de la vainilla por la presencia de enterobacterias, coliformes totales, mohos y levaduras, así como la cantidad de compuestos fenólicos por técnicas de HPLC (ácido 4-hidroxibenzóico, 4-hidroxibenzaldehído, ácido vainillínico y vainillina) durante el proceso de beneficio artesanal a fin de establecer puntos críticos de control. Se tomaron catorce muestras en diversas etapas del proceso desde la recepción, matado, ciclos de secado al sol alternados con sudor, oreado, depósito provisional y revisiones fitosanitarias, hasta vainilla beneficiada. Los...
Palavras-chave: Vainillina; Calidad microbiológica; Compuestos fenólicos; Curado; Vainillin; Microbiological quality; Phenolic compounds; Cured; Fisiología Vegetal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2048

Actividad antimicrobiana y caracterización fenólica de extractos de cálices de jamaica (Hibiscus sabdariffa L.).
Provedor de dados: 32
Autores: Morales Cabrera, Mercedes.
En este estudio se evaluó la actividad antimicrobiana de los extractos etanólicos, metanólicos y acuosos (frío y caliente) de cálices deshidratados de Hibiscus sabdariffa L. de cinco genotipos, sobre S. typhimurium (ATCC14028) y S. cholleraesuis (ATCC10708), se empleó el método difusión en agar. Se determinó la concentración mínima inhibitoria (CMI) y la concentración mínima bactericida (CMB) por dilución. Se analizó la influencia del pH en la actividad antimicrobiana. Así mismo se realizó la caracterización fenólica de los extractos etanólicos. El efecto antimicrobiano fue variable; los extractos de la variedad Alma blanca (cálices verdes), presentaron el mayor efecto antimicrobiano (diámetros de inhibición de12.5 a 19.5 mm) sobre ambos serotipos de...
Palavras-chave: CMI; CMB; PH; Salmonella; Compuestos fenólicos; HPLC; MIC; MCB; Phenolic compounds; Fitopatología; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/568

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

Interacción simbiótica Rhizobium-leguminosas arbóreas en sistemas contaminados con hidrocarburos policíclicos aromáticos.
Provedor de dados: 32
Autores: López Ortiz, Carlos.
En este estudio se evaluó el establecimiento de la simbiosis entre Rhizobium tropici CIAT899 y las leguminosas arbóreas Leucaena leucocephala (Lam.) y Acaciella angustissima (Mill.) en sistemas contaminados con naftaleno (NAF) y fenantreno (FEN), y contempló dos fases experimentales. En la primera fase se evaluó el efecto de NAF y FEN en la dinámica de formación de nódulos, así como la respuesta de la planta en el contenido de compuestos fenólicos totales, actividad antioxidante total y contenido total de clorofilas y carotenos. En la segunda fase se evaluó la degradación de 60 mg FEN kg-1 de arena, así como la actividad de la enzima nitrogenasa en las rizosfera de las plantas. La contaminación con NAF y/o FEN tuvo efectos tóxicos para la formación de...
Palavras-chave: Nódulo; HPA's; Compuestos fenólicos; Contaminación; Nodule; Phenolic compounds; Contamination; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/379

Actividad antimicrobiana y caracterización fenólica de extractos de cálices de jamaica (Hibiscus sabdariffa L.).
Provedor de dados: 32
Autores: Morales Cabrera, Mercedes.
En este estudio se evaluó la actividad antimicrobiana de los extractos etanólicos, metanólicos y acuosos (frío y caliente) de cálices deshidratados de Hibiscus sabdariffa L. de cinco genotipos, sobre S. typhimurium (ATCC14028) y S. cholleraesuis (ATCC10708), se empleó el método difusión en agar. Se determinó la concentración mínima inhibitoria (CMI) y la concentración mínima bactericida (CMB) por dilución. Se analizó la influencia del pH en la actividad antimicrobiana. Así mismo se realizó la caracterización fenólica de los extractos etanólicos. El efecto antimicrobiano fue variable; los extractos de la variedad Alma blanca (cálices verdes), presentaron el mayor efecto antimicrobiano (diámetros de inhibición de12.5 a 19.5 mm) sobre ambos serotipos de...
Palavras-chave: CMI; CMB; PH; Salmonella; Compuestos fenólicos; HPLC; MIC; MCB; Phenolic compounds; Fitopatología; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/568

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

Production of phenolic metabolites by Deschampsia antarctica shoots using UV-B treatments during cultivation in a photobioreactor
Provedor de dados: 69
Autores: Sequeida,Álvaro; Tapia,Eduardo; Ortega,Marcelo; Zamora,Pablo; Castro,Álvaro; Montes,Christian; Zúñiga,Gustavo E; Prieto,Humberto.
Deschampsia antarctica (DA), the only species in the Gramineae family endemic to the Antarctic territory, is characterized by a combination of high levels of free endogenous phenylpropanoid compounds under normal in situ and in vitro growth conditions. In this article, we describe the design and use of a specific temporary immersion photobioreactor to produce both increased DA biomass and secondary metabolite accumulation by UV-B elicitation during cultivation. Three min-long immersions in an induction medium applied every 4 hrs at 14ºC ± 1 and 20/4 hrs light/darkness photoperiod increased DA biomass production over previous in vitro reports. Biomass duplication was obtained at day 10.7 of culturing, and maximum total phenolics and antioxidant activity...
Tipo: Journal article
Palavras-chave: Deschampsia antarctica; Phenolic compounds; Temporary immersion bioreactor; UV-B elicitation.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000400008

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

Effect of blanching on physicochemical characteristics of potato flour
Provedor de dados: 75
Autores: Nascimento,Revenli Fernanda do; Canteri,Maria Helene G.
ABSTRACT Offering new products obtained from potatoes is a market opportunity which may increase and motivate the consumption of this tuber. It also can contribute for waste reduction and ensure market for growers. Thus, we aimed to produce potato flour and to evaluate the effect of blanching on the physiochemical characteristics of this product after 3-month storage at room temperature. Potatoes cultivar Agata were used to make unblanched and blanched flour, through thermal treatment at 97°C for 5 min. The unblanched potato flour presented significantly smaller contents of moisture (p= 0.006), proteins (p= 0.001) and soluble fibers (p= 0.024), as well as color alteration. However, it presented higher phenolic compound content (23.77%). The blanched potato...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum; Color; Physicochemical properties; Phenolic compounds; Thermal treatment.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000400461

Defoliation and S nutrition on radish: growth, polyphenols and antiradical activity
Provedor de dados: 75
Autores: Stagnari,Fabio; Galieni,Angelica; D’Egidio,Sara; Pagnani,Giancarlo; Ficcadenti,Nadia; Pisante,Michele.
ABSTRACT Experiments were carried out to study patterns of artificial defoliation in radish in combination with sulphur (S) fertilization, to evaluate the contribution of younger and older leaves on plant growth and phenolics accumulation in storage roots. Biomass accumulation and partitioning were related to leaf age, magnitude and timing of the clipping treatments. Older leaves increased biomass production and translocation into the storage organ; besides, they induced higher accumulation of phenolic compounds compared to the younger leaves. The highest S fertilization rate (120 kg ha-1) significantly enhanced the polyphenols accumulation, as well as the antiradical activity. The modulation of S inputs in combination with slightly induced stress from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Raphanus sativus; Biomass partitioning; Phenolic compounds; Sulphur fertilization.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300313

Obtenção de camu-camu em pó com elevado teor de compostos bioativos.
Provedor de dados: 14
Autores: CORNEJO, F. E. P.; SILVA, N. K. da; MATTA, V. M. da; FREITAS, S. P.
bitstream/item/75027/1/pub-156.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Composto bioativo; Capacidade antioxidante; Camu-camu.; Atomização; Composto fenólico; Vitamina C; Myrciaria Dubia.; Spray drying; Phenolic compounds; Ascorbic acid.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/874563

Efeito de desordens nutricionais na síntese de polifenóis em guandu e leucena utilizadas na alimentação animal.
Provedor de dados: 14
Autores: LIMA FILHO, O. F. de; ABDALLA, A. L.
bitstream/item/213274/1/BP-85-2020-FINAL.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Síntese foliar; Desordem nutricional; Deficiency; Composto Fenólico; Nutriente; Silício; Toxidez; Deficiência; Guandu; Tanino; Phenolic compounds; Silicon; Toxicity; Tannins; Nutrition.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1122593

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

Sources et caractéristiques des composés phénoliques dans l’estuaire de la Seine
Provedor de dados: 5
Autores: Motamed, B; Texier, H.
Within the framework of the multi-disciplinary program Seine Aval, phenolic compounds obtained by CuO oxidation have been studied since 1995. Quantitative analyses have shown a terrestrial contribution in flood, characterized by compounds of the group P (polyols + phenol), S (syringic) and H (hydroxybenzoic). During the low water period, phenolic compounds allow a clear distinction between fluvial and estuarine suspended material. Fluvial run-off contained Syringic, Hydroxybenzoic and Vanillic phenols. In contrast, upstream penetrating marine and estuarine waters are characterized by cinnamic phenols originating from estuarine herbus. In the turbidity maximum zone, aerobic degradation of lignin material increases the (vanillic acid/vanillin) ratio.
Tipo: Text
Palavras-chave: Composés phénoliques; HPLC; Matière en suspension; Seine; Phenolic compounds; HPLC; Suspended matter; Seine.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43570/44051.pdf

Assessment of the spatial variability of phenolic contents and associated bioactivities in the invasive alga Sargassum muticum sampled along its European range from Norway to Portugal
Provedor de dados: 5
Autores: Tanniou, A.; Vandanjon, L.; Incera, M.; Serrano Leon, Esteban; Husa, V.; Le Grand, Jacqueline; Nicolas, Jean-louis; Poupart, N.; Kervarec, N.; Engelen, A.; Walsh, R.; Guerard, F.; Bourgougnon, N.; Stiger-pouvreau, Valerie.
Sargassum muticum, an invasive brown macroalga presently distributed along European Atlantic coasts from southern Portugal to the south coast of Norway, was studied on a large geographical scale for its production of phenolic compounds with potential industrial applications and their chemical and biological activities. S. muticum can produce high biomass in Europe, which could be exploited to supply such compounds. S. muticum was collected in Portugal, Spain, France, Ireland and Norway (three sites/country) to examine the effect of the latitudinal cline and related environmental factors. Assays focused particularly on polyphenols and their activities. Crude acetone–water extracts were purified using solid phase extraction (SPE) and antioxidant and...
Tipo: Text
Palavras-chave: Antioxidant activities; Antibacterial activities; Latitudinal gradient; Phenolic compounds; Solid phase extraction; Sargassum muticum.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28221/32175.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

Effect of smoking processes on the contents of 10 major phenolic compounds in smoked fillets of herring (Cuplea harengus)
Provedor de dados: 5
Autores: Serot, Thierry; Baron, Regis; Knockaert, Camille; Vallet, Jean-luc.
This study evaluated the effects of five smoking processes on the contents of 10 major phenolic compounds in fillets of herring (Cuplea harengus), namely two traditional processes, involving smoke production by smouldering or friction, one process using liquid smoke atomisation, and two electrostatic smoking processes, also involving smouldering or friction. The effects of several parameters, such as smoking time, smokehouse temperature, electrode voltage, and fish fillet temperature before smoking were assessed for each process. The results indicate that the content of phenolic compounds are strongly affected by the process applied. The percentages of phenolic compounds in fish flesh remained constant and discriminant for a given process, regardless of...
Tipo: Text
Palavras-chave: Herring; Phenolic compounds; Smoking process.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-674.pdf

Effects of the smoking process on odour characteristics of smoked herring (Clupea harengus) and relationships with phenolic compound content
Provedor de dados: 5
Autores: Cardinal, Mireille; Cornet, Josiane; Serot, Thierry; Baron, Regis.
The relationship between smoking parameters and odour characteristics, evaluated by a trained sensory panel.. were studied on smoked herring. In addition, a possible correlation between the content of 10 phenolic compounds and sensory perceptions was investigated. Five smoking techniques were applied, combining smoke production conditions, performed by pyrolysis of beech wood sawdust or by friction of beech wood log, with smoke deposition, either in a controlled kiln (traditional smoking) or by an electrostatic process. In the fifth smoking technique, a purified condensate of beech smokes was vaporised on fish fillets in the smokehouse. The time of smoking was 3 It for traditional smoking and the liquid smoke atomisation process and 12 min for the...
Tipo: Text
Palavras-chave: Odour characteristics; Sensory evaluation; Phenolic compounds; Smoking; Herring.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-827.pdf

Sunscreen, antioxidant, and bactericide capacities of phlorotannins from the brown macroalga Halidrys siliquosa
Provedor de dados: 5
Autores: Le Lann, Klervi; Surget, Gwladys; Couteau, Celine; Coiffard, Laurence; Cerantola, Stephane; Gaillard, Fanny; Larnicol, Maud; Zubia, Mayalen; Guerard, Fabienne; Poupart, Nathalie; Stiger-pouvreau, Valerie.
The present study focused on a brown macroalga (Halidrys siliquosa), with a particular emphasis on polyphenols and their associated biological activities. Two fractions were obtained by liquid/liquid purification from a crude hydroethanolic extract: (i) an ethyl acetate fraction and (ii) an aqueous fraction. Total phenolic contents and antioxidant activities of extract and both fractions were assessed by in vitro tests (Folin-Ciocalteu test, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, reducing power assay, superoxide anion scavenging assay, and beta-carotene-linoleic acid system). For the most active fraction, i.e., the ethyl acetate fraction, the oxygen radical absorbance capacity (ORAC) value, antibacterial activities, and sunscreen...
Tipo: Text
Palavras-chave: Antioxidant; Bactericidal; Phenolic compounds; Phaeophyceae; Seaweed; ORAC value; Sunscreen potential.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00366/47682/47970.pdf

Effect of temperature, water-phase salt and phenolic contents on Listeria monocytogenes growth rates on cold-smoked salmon and evaluation of secondary models
Provedor de dados: 5
Autores: Cornu, M; Beaufort, A; Rudelle, S; Laloux, L; Bergis, H; Miconnet, N; Serot, Thierry; Delignette Muller, M.
Salting and smoking are ancient processes for fish preservation. The effects of salt and phenolic smoke compounds on the growth rate of L. monocytogenes in cold-smoked salmon were investigated through physico-chemical analyses, challenge tests on surface of cold-smoked salmon at 4 degrees C and 8 degrees C, and a survey of the literature. Estimated growth rates were compared to predictions of existing secondary models, taking into account the effects of temperature, water phase salt content, phenolic content, and additional factors (e.g. pH, lactate, dissolved CO2). The secondary model proposed by Devlieghere et al. [Devlieghere, F., Geeraerd, A.H., Versyck, K.J., Vandewaetere, B., van Impe, J., Debevere, J., 2001. Growth of Listeria monocytogenes in...
Tipo: Text
Palavras-chave: Phenolic compounds; Validation criteria; Microbial exposure assessment; Predictive microbiology; L. monocytogenes; Fishery products.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3953.pdf

Phosphites for the control of anthracnose in common bean
Provedor de dados: 86
Autores: Gadaga,Stélio Jorge Castro; Abreu,Mário Sobral de; Resende,Mário Lúcio Vilela de; Ribeiro Júnior,Pedro Martins.
Abstract: The objective of this work was to evaluate the effect of phosphites in the protection of common bean (Phaseolus vulgaris) against anthracnose. Different phosphite formulations were evaluated by quantifying peroxidase and polyphenol oxidase activity, total phenols, and lignin content. The treatments consisted of sprayings, in the V4, R5, and R7 stages, with: the K, Zn, Mn, K+Mn, K+salicyclic acid, and Cu phosphites; salicylic acid; acibenzolar-S-methyl; the fungicide azoxystrobin; besides a control, without sprayings. The area under the disease progress curve was lower in plants that received applications of the K and Mn phosphites, whose values ranged between 74 and 81%, compared with the control. The K, Zn, and K+salicyilic acid phosphites were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colletotrichum limdemuthianum; Phaseolus vulgaris; Alternative control; Enzymatic activity; Phenolic compounds.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000100036

Preharvest treatment with 1-aminoethoxyvinylglycine and gibberellin on the quality and physiology of cashew peduncles
Provedor de dados: 86
Autores: Souza,Kellina Oliveira de; Xavier,Cícera Vanuza; Lopes,Mônica Maria de Almeida; Moura,Carlos Farley Herbster; Silva,Ebenezer Oliveira; Ayala-Zavala,Jesus Fernando; Miranda,Maria Raquel Alcântara de.
Abstract: The objective of this work was to evaluate the effects of the preharvest treatment with gibberellic acid (GA3) and aminoethoxyvinylglycine (AVG) on the quality and physiological attributes of ripe 'CCP 76' cashew (Anacardium occidentale) peduncles at different developmental stages. Sprays of 180 mg L-1 GA3 and 180 mg L-1 AVG were applied, combined and isolated, at 34, 40, and 44 days after anthesis (DAA), and peduncles were harvested ripe at 46 DAA and evaluated for physical and physiological variables. The treatment with GA3 resulted in firmer peduncles with a greater apical diameter, but did not affect the physiological variables activity of the pectin methylesterase and polygalacturonase cell wall enzymes and degree of lipid peroxidation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anacardium occidentale; AVG; GA3; Phenolic compounds.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600684

Meloidogyne javanica parasitism and its impacts on the vegetative parameters, physicochemical composition, and antioxidant potential of beet
Provedor de dados: 86
Autores: Débia,Paula Juliana Grotto; Bolanho,Beatriz Cervejeira; Puerari,Heriksen Higashi; Dias-Arieira,Claudia Regina.
Abstract: The objective of this work was to evaluate the effects of infestation by Meloidogyne javanica on the vegetative development, nutritional characteristics, and antioxidant potential of beet (Beta vulgaris). Inoculation in beet seedlings was performed with 0, 1,000, 2,500, 5,000, and 10,000 eggs and with possible second-stage juveniles (J2) of nematodes. Plants were collected 60 days after inoculation for the evaluation of the nematological and vegetative parameters, the physicochemical composition, and the content and activity of antioxidant compounds. The population levels of M. javanica reduced the mass and diameter of the tuber, comparing inoculum levels of 0 and 10,000 eggs + J2 of nematodes. There was a significant difference for the number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beta vulgaris; Betalains; Gall nematodes; Phenolic compounds; Tuber.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102902

Characterization and multivariate classification of grapes and wines of two Cabernet Sauvignon clones
Provedor de dados: 86
Autores: Burin,Vívian Maria; Silva,Aparecido Lima da; Malinovski,Luciane Isabel; Rosier,Jean Pierre; Falcão,Leila Denise; Bordignon-Luiz,Marilde Teresinha.
The objective of this work was to assess and characterize two clones, 169 and 685, of Cabernet Sauvignon grapes and to evaluate the wine produced from these grapes. The experiment was carried out in São Joaquim, SC, Brazil, during the 2009 harvest season. During grape ripening, the evolution of physical-chemical properties, phenolic compounds, organic acids, and anthocyanins was evaluated. During grape harvest, yield components were determined for each clone. Individual and total phenolics, individual and total anthocyanins, and antioxidant activity were evaluated for wine. The clones were also assessed regarding the duration of their phenological cycle. During ripening, the evolution of phenolic compounds and of physical-chemical parameters was similar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Phenology; Ripeness.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000500004

Sensitivity of yellow passion fruit to ultraviolet-B radiation
Provedor de dados: 86
Autores: Cechin,Inês; Rocha,Valéria de Jesus; Fumis,Terezinha de Fátima.
The objective of this work was to evaluate the effects of UV-B radiation on the vegetative growth and on the gas exchange characteristics of passion fruit plants (Passiflora edulis) grown in greenhouse. The average unweighted UV-B radiation near the apex of the plants was 8 W m-2 for the UV-B treatment (high UV-B), and 0.8 W m-2 for the control plants (low UV-B). Plants were irradiated with UV-B for 7 hours per day, centered on solar noon, during 16 days. High UV-B radiation resulted in lower shoot dry matter accumulation per plant. The content of UV-B absorbing compounds and anthocyanins was increased in the plants exposed to high UV-B radiation, when compared with the control. UV-B radiation did not affect stomatal conductance or transpiration rate, but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passiflora edulis; Anthocyanins; Growth; Phenolic compounds; Photosynthesis.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001000002

Calcium anacardate as growth promoter for piglets at the nursery phase
Provedor de dados: 86
Autores: Matos,Amanda Veruska Silva de; Watanabe,Pedro Henrique; Freitas,Ednardo Rodrigues; Santos,Kassia Moreira; Araújo,Lina Raquel Santos; Nepomuceno,Rafael Carlos; Vieira,Alini Mari; Vieira,Eloisa Helena Mendes.
Abstract: The objective of this work was to evaluate the effects of the dietary inclusion of calcium anacardate on the performance, diarrhea incidence, blood parameters, intestinal morphometry, and pH of gastrointestinal contents in piglets from 21 to 42 days of age. Sixty weaned Topigs piglets, with initial weight of 6.049±0.311 kg, were distributed in the following treatments: diet with or without antibiotic growth promoter (zinc bacitracin) and diets supplemented with increasing levels of calcium anacardate (0.4, 0.8, and 1.2%), with six replicates and two animals per experimental unit. No differences in performance (21 to 42 days of age), blood parameters, and villus height:crypt depth ratio were found between piglets fed diets containing calcium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anacardic acid; Intestinal morphometry; Organic acids; Phenolic compounds; Post-weaning; Zinc bacitracin.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201253

Allelopathic action of parthenium and its rhizospheric soil on maize as influenced by growing conditions
Provedor de dados: 87
Autores: Safdar,M.E.; Tanveer,A.; Khaliq,A.; Naeem,M.S.
Biosynthesis and subsequent release of allelochemicals by a plant into the environment is supposed to be influenced by its growing conditions. To ascertain what will be the allelopathic action of plant parts and rhizospheric soils of parthenium (Parthenium hysterophorus) growing at various farm locations with varied growing conditions, germination and seedling growth of maize hybrid (DK 6142) were assayed by sowing its seeds in petri plates lined with filter paper and pots filled with soil. Minimum germination percentage (30.0%), germination index (2.01), germination energy (36.3), seedling length (3.3 cm), seedling biomass (10 mg) and seedling vigor index (99.0) of maize were observed in leaf extract followed by fruit and whole plant extracts of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Parthenium hysterophorus; Plant bioassay; Soil bioassay; Zea mays; Phenolic compounds.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200001

Produção de compostos fenólicos durante a infecção ectomicorrízica por dois isolados de Pisolithus tinctorius em Eucalyptus urophylla in vitro
Provedor de dados: 88
Autores: BAPTISTA,MÍRIAN J.; GLORIA,BEATRIZ APPEZZATO DA; PASCHOLATI,SÉRGIO F.; KRUGNER,TASSO L.
Devido à grande variedade fisiológica e morfológica entre os fungos ectomicorrízicos, é possível observar variações no seu comportamento durante o estabelecimento da simbiose. Este trabalho teve como objetivos caracterizar as etapas da infecção micorrízica por dois isolados de P. tinctorius em E. urophylla, além de verificar a ocorrência de defesas estruturais e bioquímicas na planta. Plântulas de E. urophylla foram inoculadas com os isolados de P. tinctorius obtidos de eucalipto (1604) ou de Pinus (185). Após 0, 12, 24, 72, 96 e 120 horas da inoculação com cada um dos isolados, foi efetuada a dosagem de compostos fenólicos no tecido radicular. Nestes mesmos períodos foram feitos cortes anatômicos das raízes para verificar o desenvolvimento da infecção. Os...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pisolithus tinctorius; Phenolic compounds; Ectomycorrhiza.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500013

Leaf and calycine colleters in Odontadenia lutea (Apocynaceae - Apocynoideae - Odontadenieae): their structure and histochemistry
Provedor de dados: 88
Autores: Martins,Fabiano Machado.
The structure and histochemistry of colleters found on the vegetative and floral apices of Odontadenia lutea are described. Colleters occur on vegetative apices starting at the fourth node, with 68 to 80 colleters being found at each node. Each leaf primordium has only one colleter of axillary origin, 3-5 intra-petiolar, and 12-16 inter-petiolar (intra-stipular). There are four types of colleters: standard, bipartite standard, sessile, and bipartite sessile. Colleters on the reproductive apices alternate with the sepals and are sessile, reduced sessile, tripartite laminar sessile, or asymmetrical. All of the colleters have a central nucleus of parenchymatous cells covered by a palisade uniseriate secretory epidermis and a thin cuticle. Secretory idioblasts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mucilage; Phenolic compounds; Secretory structures.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000100007

Effect of Marination with Fruit and Vegetable Juice on the Some Quality Characteristics of Turkey Breast Meat
Provedor de dados: 89
Autores: Gök,V; Bor,Y.
ABSTRACT The effect of marination with antioxidant-rich fruit and vegetable juices, including black carrot juice, black mulberry juice, black grape and pomegranate juice, mixed vegetable juice (yellow carrot, tomato, zucchini, pepper, black carrot, cucumber and lettuce) for 24 and 48 hours on chemical, textural and sensorial properties of turkey breast meat was investigated. Moisture content of the samples marinated for 24 hours and cooked varied between 58.85 and 70.51%, with the control sample presenting the moisture highest value. The samples marinated in red grape juice for 48 hours had the highest cooking loss (49.11%), while the lowest cooking loss was recorded in the samples marinated in black carrot juice (40.61%). Moreover, the phenolic content of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant; Marination; Phenolic compounds; Turkey meat; Texture.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300481

Phosphate and potassium fertilization on agronomic and physico-chemical characteristics and bioactive compounds of eggplant
Provedor de dados: 91
Autores: Oliveira,Luciene A. de; Silva,Ernani C. da; Carlos,Lanamar de A.; Maciel,Gabriel M.
ABSTRACT Eggplant is a functional food rich in antioxidants and its consumption brings several benefits to human health. Phenolic compounds and anthocyanins are some of the compounds that interfere in this antioxidant capacity and may be influenced by the mineral nutrition of the plant. The objective was to analyze the effects of potassium and phosphate fertilization on the agronomic and physico-chemical characteristics and bioactive compounds of eggplant fruits. The work was carried out at the Taboquinha Farm, in the municipality of Baldim, MG, at coordinates 19º 17’ 12.5” S and 43º 54’ 01” W, from March to October 2017. The experimental design was randomized blocks in a 4 x 4 factorial scheme with four replicates. The factors under study were phosphorus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mineral nutrition; Anthocyanins; Phenolic compounds.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000400291

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

Rootstock-scion interaction:3. Effect on the composition of Cabernet Sauvignon wine
Provedor de dados: 94
Autores: Miele,Alberto; Rizzon,Luiz Antenor.
Abstract  The interaction among rootstock, scion and environment may induce different responses to the grapevine physiology and consequently to the grape and wine composition. The vineyards of Serra Gaúcha, Brazil, are established in soils that may have different physicochemical attributes. Furthermore, the grapevines are grafted on a wide diversity of rootstocks. Therefore, this study aimed to determine their effect on the wine composition of the Cabernet Sauvignon (CS) grafted on Rupestris du Lot, 101-14 Mgt, 3309 C, 420A Mgt, 5BB K, 161-49 C, SO4, Solferino, 1103 P, 99 R, 110 R, Gravesac, Fercal, Dogridge and Isabel, featuring some genetic diversity altogether. The experimental design was in randomized blocks, with 15 treatments, three replicates and 10...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis vinifera; Grapevine; Phenolic compounds; Volatile substances.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000101004

QUALITY CHARACTERISTICS AND ANTIOXIDANT ACTIVITY OF JUICES PRODUCED WITH IRRADIATED GRAPES
Provedor de dados: 94
Autores: BOAS,ANA CAROLINA VILAS; NASSUR,RITA DE CÁSSIA MIRELA RESENDE; FREIRE,JULIANA MESQUITA; DECARLOS NETO,ANTÔNIO; LIMA,LUIZ CARLOS DE OLIVEIRA.
ABSTRACT  The aim of this study was to evaluate physicochemical characteristics, antioxidant activity, total phenolic, vitamin C and anthocyanins content of grape juices from cv. Isabel submitted to different UV-C doses. The fruits were harvested, sanitized and inserted into a UV-C radiation chamber, where different doses were applied: 0 kJ/m2 (0 minutes); 0.68 kJ/m2 (2 minutes); 2.73 kJ/m2 (4 minutes); 4.10 kJ/m2 (6 minutes). The grape juice was extracted at 75±5°C for 1 hour, using an equipment with steam extraction and submitted to evaluations after 0, 30, 60 and 90 days of cold storage. No significant differences were observed in grape juices submitted to radiation doses regarding the antioxidant activity and phenolic compounds. However, the vitamin C...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis labrusca; Phenolic compounds; Vitamin C; Quality; Irradiation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200901

Active modified atmosphere storage to preserve the quality of 'San Andreas' strawberries harvest at two ripening stages
Provedor de dados: 94
Autores: Anami,Jéssica Mayumi; Steffens,Cristiano André; Moreira,Marcelo Alves; Fernandes,Raquel Carlos; Mosquera,Deysi Jhoana Camayo; Amarante,Cassandro Vidal Talamini do.
Abstract  This work was carried out to evaluate the effect of fruit ripening stage at harvest (“1/3 ripe” and “3/4 ripe”, respectively with 30% and 75% of red color) and passive modified atmosphere (MA) and active MA (with initial initial low O2 and/or high CO2) on quality of ‘San Andreas’ strawberries, with emphasis on bioactive compounds and metabolites of fermentative metabolism. The treatments evaluated were: control; passive MA [low density polyethylene (LDPE) packaging of 40 µm]; active MA with initial low O2 (1 kPa); active MA with initial high CO2 (30 kPa); and active MA with initial low O2 (1 kPa) and high CO2 (30 kPa). After 14 days of storage (0.5±0.2°C/92±2% RH) followed by two days of shelf life (20±5°C/65±10% RH), fruit weight loss was higher...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fragaria ananassa; High CO2; Low O2; Texture; Phenolic compounds; Fermentative metabolism; Decay; Fruit quality.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000100301

Bioactive compounds and antioxidant activity three fruit species from the Brazilian Cerrado
Provedor de dados: 94
Autores: Moreira-Araújo,Regilda Saraiva dos Reis; Barros,Nara Vanessa dos Anjos; Porto,Rayssa Gabriela Costa Lima; Brandão,Amanda de Castro Amorim Serpa; Lima,Alessandro de; Fett,Roseane.
Abstract  The aim of this study was to determine the content of bioactive compounds and antioxidant activity present in three fruit species from the Brazilian Cerrado: carnauba (Copernicia prunifera (Mill.) H.E. Moore), murici (Byrsonima crassifolia L. Rich)and oiti (Licania tomentosa (Benth) Fritsch). Among analyzed fruits, oiti showed the highest total phenolic content (1236.42 ± 34.06 mg GAE 100 g-1) followed by murici (468.90 ± 27.30 mg GAE 100 g-1) and carnauba (314.44 ± 9.50 mg GAE 100 g-1). Regarding the antioxidant activity, murici showed 4350.31 ± 1.85 µmol TEAC.100 g-1 and oiti showed 14721.69 ± 0.85 µmol TEAC.100 g-1. In addition, high content of anthocyanins was verified in carnauba (9.35 ± 0.00 mg-cy-3-glu.100 g-1), as well as carotenoids...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidants; Anthocyanins; Carotenoids; Phenolic compounds; Cerrado.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000300901

Effect of soil classes and climatic conditions on the productive characteristics and composition of Cabernet Sauvignon grapes
Provedor de dados: 94
Autores: Warmling,Maria Tereza; Albuquerque,Jackson Adriano; Warmling,Maria Izabel; Rufato,Leo; Andognini,Jadiel.
Abstract  Grapevines can be grown in different soil classes and climatic conditions. However, the effect of these variables on grapevine and grape composition is complex. The aim of this study was to evaluate the effect of soil classes and climatic conditions on productive and physico-chemical characteristics and phenolic compounds of Cabernet Sauvignon grapes. The experiment was carried out in São Joaquim (SC), located on the Southern Plateau of Santa Catarina. Cabernet Sauvignon variety was analyzed in three soils (Dystrudepts, Humudepts and Rhodudalfs) and two harvests (2015 and 2016). The climatic variables analyzed were rainfall, insolation and average, maximum and minimum temperatures. Soil physical-chemical attributes, productive and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Viticulture; Vitis vinífera; Phenolic compounds; Anthocyanins.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000600701

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

Physiological quality, content and activity of antioxidants in soybean seeds artificially aged
Provedor de dados: 95
Autores: Ávila,Marizangela Rizzatti; Braccini,Alessandro de Lucca e; Souza,Cristina Giatti Marques de; Mandarino,José Marcos Gontijo; Bazo,Gabriel Loli; Cabral,Yara Camila Fabrin.
The objective of this study was to evaluate physiological quality, content, and activity of antioxidants, in soybean seeds subjected to accelerated aging during different periods. Seeds of cultivars BRS 258, BRS 262 and BRS 268, subjected to accelerated aging during 12, 24, 36 and 48 hours and non-aged seeds were used. After each aging period, the seed were evaluated by tests of: germination; first count and tetrazolium. The total of phenolic compounds, total flavonoides, total of isoflavones, and activity for eliminating ABTS●+ radicals were quantified. There were differences among cultivars according to vigor and viability only after seeds were aged. Cultivars BRS 158 and BRS 268 have shown better seed physiological quality in each aging period; however,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isoflavones; Glycine max; Phenolic compounds; Viability; Vigor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300006

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

Infestation of froghopper nymphs changes the amounts of total phenolics in sugarcane
Provedor de dados: 63
Autores: Silva,Rafael José Navas da; Guimarães,Eduardo Rossini; Garcia,José Francisco; Botelho,Paulo Sérgio Machado; Ferro,Maria Inês Tiraboschi; Mutton,Miguel Angelo; Mutton,Márcia Justino Rossini.
The increased rate of sugarcane harvest without previous burn has provided a very favorable environment to the froghopper Mahanarva fimbriolata (Stal, 1854), with high moisture and low temperature variation. Few works have studied the response of sugarcane to this pest, so little is known about resistant cultivars. Plant phenolics are widely studied compounds because of their known antiherbivore effect. This research aims to determine if the attack of M. fimbriolata nymphs stimulates the accumulation of total phenolics in sugarcane. The experiment was carried out in greenhouse and arranged in completely randomized design, in a 3 X 2 X 4 factorial with three replications. Second instar nymphs of M. fimbriolata were infested at the following rates: control,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp; Phenolic compounds; Secondary metabolism; Plant-insect interaction.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000600005

Arbuscular mycorrhizal fungi and the occurrence of flavonoids in roots of passion fruit seedlings
Provedor de dados: 63
Autores: Soares,Ana Cristina Fermino; Martins,Marco Antônio; Mathias,Lêda; Freitas,Marta Simone Mendonça.
Composition and the role of root flavonoids in the regulation of mycorrhizal symbiosis are still poorly understood. Several flavonoids stimulate spore germination, mycelia growth and root colonization by arbuscular mycorrhizal fungi (AMF), and both root colonization and flavonoid composition are affected by plant nutritional status. Effects of AMF on the occurrence and content of aromatic secondary metabolites in the roots of passion fruit seedlings grown under two levels of phosphorus (P) fertilization (10 and 50 mg kg-1 of phosphorus) was studied. Seedlings were inoculated with Glomus clarum and a population of native fungi from a passion fruit plantation. Methanolic extracts of passion fruit seedlings roots were analyzed by high performance liquid...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Phenolic compounds; Mycorrhizal plants; Phosphorus nutrition.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000400005

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

Application of mulberry (Morus alba L.) for supplementing antioxidant activity in extruded Thai rice snack
Provedor de dados: 106
Autores: Chulaluck Charunuch; Plernchai Tangkanakul; Saovaluk Runggaeng; Vayooh Sonted.
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: Image
Palavras-chave: Extruded Thai rice snack; Mulberry leaf; Antioxidant agent; Supplement; Functional properties; Physical characteristics; Phenolic compounds; อาหารขบเคี้ยว; ใบหม่อน; สารต้านอนุมูลอิสระ; สารเสริม; คุณสมบัติทางกายภาพ; คุณสมบัติทางเคมี.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5136

Microwave extraction of champa (Campomanesia lineatifolia Ruiz &amp;amp; Pav.) fruit: alternative to obtain natural antioxidants
Provedor de dados: 109
Autores: Otalvaro-Álvarez,Ángela María; Pabón-Baquero,Ludy Cristina; Rendón-Fernández,Margarita Rosa; Chaparro-González,María Patricia.
Abstract Champa (Campomanesia lineatifolia Ruiz &amp; Pav.) is a fruit tree that belongs to Myrtaceae family and is native from the Amazon. Champa fruit has special organoleptic characteristics like its flavor and is an important source of phenolic compounds useful in food industry. Currently, the postharvest process of champa fruit needs to be improved due to fruit losses, which had achieved a 97%. In this sense, the aim of this research was to evaluate microwave extraction to obtain extracts enriched in phenolic compounds from champa fruit. The evaluated variables were as follows: microwave power (100-200W), extraction time (1-2min) and solvent (water, ethanol-water 70:30 and ethanol-water 96:4), respectively. Results showed that the best condition to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agroindustrial biotechnology; Food processing; Fruit extracts; Natural additives; Phenolic compounds; Fruit postharvest.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100053

First phytochemical and biological study of the ethanolic extract from leaves of Capirona decorticans (Rubiaceae)
Provedor de dados: 36
Autores: BARBOSA,Fernando Gomes; SUGUI,Marina Mariko; SINHORIN,Valéria Dornelles Gindri; BICUDO,Rogério de Campos; MOURA,Fernando Rafael de; SINHORIN,Adilson Paulo.
ABSTRACT Capirona decorticans (Rubiaceae) is popularly used to treat warts, wounds, mycoses and scabies, and is also a component of the Ayahuasca tea. Despite its popular use, the phytochemical and pharmacological research on this species is limited. Therefore, this work quantified phenolic compounds in the ethanolic extract (EE) and hydromethanolic fraction (FM) (406, 293 mgEAG g-1, respectively) from leaves of C. decorticans. We identified flavonoids by LC-MS/MS-MMR-ESI (apigenin, rutin, luteolin, miricetin, quercetin, quercetin-3-β-D-glucoside, quercetrin), and evaluated oxidative stress and mutagenic/antimutagenic effect of EE and FM through an in vivo experiment using Swiss mice and cyclophosphamide (CP) as an inducer of DNA damage and oxidative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oxidative stress; Cyclophosphamide; Genotoxicity; Phenolic compounds.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000400338

Physical and chemical characterization and bioactive compounds from blackberry under calcium chloride application
Provedor de dados: 1
Autores: Modesto, Joyce Helena; Mirellys Azevedo Souza, Jackson; Ferraz, Rafael Augusto; Souza Silva, Marcelo; Leonel, Magali; Leonel, Sarita.
Calcium chloride application on fruits maintains the firmness of fruits, decreases storage breakdown and rot, extends shelf-life, and increases vitamin C and calcium content. Blackberries have low post-harvest durability due to the intrinsic characteristics of their fruits, mainly the high respiratory rate and low firmness, which causes problems in the production chain of fresh fruits. The current study aimed to evaluate the effects of pre-harvest application of calcium chloride on the fruits of ‘Tupy’ blackberry (Rubus spp.). A randomized block design for a factorial scheme was used, i.e. calcium chloride concentrations (0, 1.5, 3, and 4.5%) and number of applications (1, 2, and 3). Multiple applications occurred between 5-day intervals. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rubus spp.; Fruit texture; Nutritional value; Ca 2; Phenolic compounds; Antioxidant activity.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42449

Growth, development and content of flavonoids in calendula (Calendula officinalis L.)
Provedor de dados: 1
Autores: Honório, Isabela Cristina Gomes; Bonfim, Filipe Pereira Giardini; Montoya, Sebastián Giraldo; Casali, Vicente Vagner Dias; Leite, João Paulo Viana; Cecon, Paulo Roberto.
Flavonoids, the pharmaco-active compounds studied in this work, in general, are located in the shoots as natural pigments that protect the plants from damage by oxidizing agents. The experiment was conducted in the greenhouse of the Fitotecnia Department, Federal University of Viçosa, Minas Gerais Staty. The experimental design was completely randomized with five treatments and five replications. The treatments were the time of harvest: zero, three, six, nine, and twelve days after anthesis (DAA). The height of the plant (mm), stem diameter (mm), number of leaves and total flavonoid content (%, w w-1) were determined. We developed growth curves for calendula with growth behavior assessed through time for height, stem diameter and number of leaves. The time...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomy; Fitotecny secondary metabolism; Phenolic compounds; Harvest season; Plant performance Medicinal Plants.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/25976

Nutritional value and chemical composition of pastures of peanut forage or red clover - doi: 10.4025/actascianimsci.v35i1.12692
Provedor de dados: 2
Autores: Azevedo Junior, Ricardo Lima de; Universidade Federal de Santa Maria; Olivo, Clair Jorge; Universidade Federal de Santa Maria; Bem, Cláudia Marques de; Universidade Federal de Santa Maria; Aguirre, Priscila Flores; Universidade Federal de Santa Maria; Quatrin, Mauricio Pase; Universidade Federal de Santa Maria; Ávila, Suélen Capa de; Universidade Federal de Santa Maria.
With this study, we aimed at evaluating the nutritional value and chemical composition of forage legume intercropping with elephant grass (EG) + spontaneous growth species (SGS) + annual ryegrass (AR) + peanut forage (PF), as treatment T1; and EG + SGS + AR + red clover (RD), as T2. The EG was planted in 4-m spaced rows. The annual ryegrass was planted between the EG rows during the cool season; the RC was sowed and the PF was preserved. The experiment was performed between October 2009 and April 2010, with six grazing cycles. Samples of forage legume was collected, under simulated the grazing, to determine the levels of organic matter (OM), crude protein (CP), neutral detergent fiber (NDF), organic matter in situ digestibility (OMISD), total phenols (TF),...
Tipo: Pesquisa de campo
Palavras-chave: 5.04.04.00-8 Arachis pintoi; Crude protein; Digestibility; Neutral detergent fiber; Phenolic compounds; Trifolium pratense.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12692

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 the pulsed electric field -assisted extraction of functional compounds from Nepeta binaludensis
Provedor de dados: 111
Autores: Azimi Mahalleh, Afsaneh; Sharayei, Parvin; Mortazavi, Seyed Ali; Azarpazhooh, Elham; Niazmand, Razieh.
Pulsed electric field (PEF) treatment was used for extracting effective components from Nepeta (Nepeta binaludensis Jamzad). A response surface method was used to investigate the effects of independent process variables (voltage of pulsed electric field (VPEF): 2, 4 and 6 KV/cm and number of pulsed electric field (NPEF): 20, 40 and 60 n) on the yield (Y) and antioxidant characteristics: total phenolic compounds (TPC), 1,1- diphenyl -2- picrylhydrazyl free radical scavenging (DPPHsc), ferric reducing-antioxidant power (FRAP), half  maximal of radical-scavenging activity (IC50) of Nepeta extract (aerial parts). According to Derringer’s desired function approach, the optimal conditions based on both individual and combinations of all process variables were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Nepeta binaludensis; Response Surface Methodology; Pulsed electric field; Antimicrobial activity.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5391

Optimization of the pulsed electric field -assisted extraction of functional compounds from Nepeta binaludensis
Provedor de dados: 111
Autores: Azimi Mahalleh, Afsaneh; Sharayei, Parvin; Mortazavi, Seyed Ali; Azarpazhooh, Elham; Niazmand, Razieh.
Pulsed electric field (PEF) treatment was used for extracting effective components from Nepeta (Nepeta binaludensis Jamzad). A response surface method was used to investigate the effects of independent process variables (voltage of pulsed electric field (VPEF): 2, 4 and 6 KV/cm and number of pulsed electric field (NPEF): 20, 40 and 60 n) on the yield (Y) and antioxidant characteristics: total phenolic compounds (TPC), 1,1- diphenyl -2- picrylhydrazyl free radical scavenging (DPPHsc), ferric reducing-antioxidant power (FRAP), half  maximal of radical-scavenging activity (IC50) of Nepeta extract (aerial parts). According to Derringer’s desired function approach, the optimal conditions based on both individual and combinations of all process variables were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Nepeta binaludensis; Response Surface Methodology; Pulsed electric field; Antimicrobial activity.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5391

Reduction of the DNA damages, Hepatoprotective Effect and Antioxidant Potential of the Coconut Water, ascorbic and Caffeic Acids in Oxidative Stress Mediated by Ethanol
Provedor de dados: 42
Autores: BISPO,VANDERSON S.; DANTAS,LUCAS S.; CHAVES FILHO,ADRIANO B.; PINTO,ISABELLA F.D.; SILVA,RAILMARA P. DA; OTSUKA,FELIPE A.M.; SANTOS,RODRIGO B.; SANTOS,ALINE C.; TRINDADE,DANIELLE J.; MATOS,HUMBERTO R.
ABSTRACT Hepatic disorders such as steatosis and alcoholic steatohepatitis are common diseases that affect thousands of people around the globe. This study aims to identify the main phenol compounds using a new HPLC-ESI+-MS/MS method, to evaluate some oxidative stress parameters and the hepatoprotective action of green dwarf coconut water, caffeic and ascorbic acids on the liver and serum of rats treated with ethanol. The results showed five polyphenols in the lyophilized coconut water spiked with standards: chlorogenic acid (0.18 µM), caffeic acid (1.1 µM), methyl caffeate (0.03 µM), quercetin (0.08 µM) and ferulic acid (0.02 µM) isomers. In the animals, the activity of the serum γ-glutamyltranspeptidase (γ-GT) was reduced to 1.8 I.U/L in the coconut...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coconut water; Ethanol; Oxidative stress; Phenolic compounds.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301095

Antioxidant potential and cytotoxic activity of two red seaweed species, Amansia multifida and Meristiella echinocarpa, from the coast of Northeastern Brazil
Provedor de dados: 42
Autores: ALENCAR,DANIEL B. DE; SILVA,SUZETE R. DA; PIRES-CAVALCANTE,KELMA M.S.; LIMA,REBECA L. DE; PEREIRA JÚNIOR,FRANCISCO N.; SOUSA,MÁRCIA B. DE; VIANA,FRANCISCO A.; NAGANO,CELSO S.; NASCIMENTO,KYRIA S. DO; CAVADA,BENILDO S.; SAMPAIO,ALEXANDRE H.; SAKER-SAMPAIO,SILVANA.
Natural antioxidants found in marine macroalgae are bioactive compounds known to play an important role in the prevention of diseases associated with aging cells protecting them against the oxidative damage. The purpose of this study was to evaluate the antioxidant and cytotoxic activity of ethanolic extracts of two species of red seaweeds, Amansia multifida and Meristiella echinocarpa. In vitro antioxidant activity was determined by DPPH radical scavenging assay, ferric-reducing antioxidant power (FRAP) assay, ferrous ion chelating (FIC) assay, β-carotene bleaching (BCB) assay and total phenolic content (TPC) quantification. Cytotoxicity was evaluated with the brine shrimp Artemia sp. lethality test. The TPC values observed in the present study indicated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant; Bioactive compounds; Cytotoxic; Phenolic compounds; Rhodophyta.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100251

New seminal variety of Stevia rebaudiana: Obtaining fractions with high antioxidant potential of leaves
Provedor de dados: 42
Autores: MILANI,PAULA G.; FORMIGONI,MAYSA; DACOME,ANTONIO S.; BENOSSI,LIVIA; COSTA,CECÍLIA E.M. DA; COSTA,SILVIO C. DA.
ABSTRACT The aim of this study was to determine the composition and antioxidant potential of leaves of a new variety of Stevia rebaudiana (Stevia UEM-13). Stevia leaves of UEM-13 contain rebaudioside A as the main glycoside, while most wild Stevia plants contain stevioside. Furthermore can be multiplied by seed, which reduces the cost of plant culture techniques as other clonal varieties are multiplied by buds, requiring sophisticated and expensive seedling production systems. Ethanol and methanol were used in the extraction to determine the bioactive compounds. The methanolic extract was fractionated sequentially with hexane, chloroform, ethyl acetate and isobutanol, and the highest concentration of phenolic compounds and flavonoids was obtained in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioactive compounds; Glycosides; Leaf extracts; Phenolic compounds; New cultivar of Stevia.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401841

Pollen types and levels of total phenolic compounds in propolis produced by Apis mellifera L. (Apidae) in an area of the Semiarid Region of Bahia, Brazil
Provedor de dados: 42
Autores: MATOS,VANESSA R.; ALENCAR,SEVERINO M.; SANTOS,FRANCISCO A.R.
Twenty-two propolis samples produced by Apis mellifera L. in an area of the Semiarid region the the State of Bahia (Agreste of Alagoinhas), Brazil, were palynologically analyzed and quantified regarding their levels of total phenolic compounds. These samples were processed using the acetolysis technique with the changes suggested for use with propolis. We found 59 pollen types belonging to 19 families and 36 genera. The family Fabaceae was the most representative in this study with nine pollen types, followed by the family Asteraceae with seven types. The typesMikania and Mimosa pudica occurred in all samples analyzed. The types Mimosa pudica andEucalyptus had frequency of occurrence above 50% in at least one sample. The highest similarity index (c. 72%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apicultural products; Floristic similarity; Melissopalynology; Phenolic compounds.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100407

In vitro antioxidant capacity of tea of Echinodorus grandiforus, “leather hat,” in Wistar rat liver
Provedor de dados: 42
Autores: LUNARDI,RAFAELA F.; WOHLENBERG,MARIANE; MEDEIROS,NIARA; AGOSTINI,FABIANE; FUNCHAL,CLÁUDIA; DANI,CAROLINE.
Oxidative stress has been considered as one of the factors responsible for hepatic diseases, which sometimes require new ways of treatment. The present study aimed to evaluate the in vitro antioxidant capacity of the tea of Echinodorus grandiforus (“leather hat” plant) in rat liver. Different preparations of tea were evaluated for phenolic composition, antioxidant activity by DPPH assay and ability to inhibit lipid peroxidation induced by copper sulfate. The antioxidant activity was assessed in liver tissue treated with sodium azide in the presence or absence of tea by assays for lipid peroxidation (TBARS), protein oxidation (carbonyl) and the antioxidant enzymes catalase (CAT) and superoxide dismutase (SOD). The results show that different preparations of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oxidative stress; Phenolic compounds; Reactive species; Sodium azide.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301451

Physicochemical, Antioxidant and Sensory Quality of Brazilian Blueberry Wine
Provedor de dados: 42
Autores: SANTOS,ROBERTA O.; TRINDADE,SIMONE C.; MAURER,LUANA H.; BERSCH,ANDRIELY M.; SAUTTER,CLAUDIA K.; PENNA,NEIDI G.
ABSTRACT Currently, Rio Grande do Sul state is the main producer of blueberry in Brazil. Practically all production is commercialized in fresh state and only a small portion is subject to processing. The blueberry wine making process is an alternative to expand the beverage industry and offers to the consumer a value-added product as well as a new market for Brazilian blueberry producers. The objectives of this study were to produce wines from blueberries and to evaluate the effect of deacidification (with calcium carbonate) and chaptalization (with glucose syrup or sucrose) on physicochemical characteristics, antioxidant content, and sensory parameters. Samples were analyzed for total soluble solids, pH, total titratable acidity, total sugar content,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vaccinium ashei Reade; Anthocyanin; Phenolic compounds; Alcoholic beverage.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401557

Crambe (Crambe abyssinica) and sunflower (Helianthus annuus) protein concentrates: production methods and nutritional properties for use in fish feed
Provedor de dados: 42
Autores: LOVATTO,NAGLEZI M.; GOULART,FERNANDA R.; LOUREIRO,BRUNO B.; SPERONI,CAROLINE S.; BENDER,ANA B.B.; GIACOMINI,SANDRO J.; RADÜNZ NETO,JOÃO; SILVA,LEILA P. DA.
ABSTRACT The purpose of this study was to develop and improve protein concentration techniques for two industrial by-products with the potential for use in fish feed. In particular, we chemically characterized crambe meal and sunflower meal and their protein concentrates. Three different protein concentration methods were tested: isoelectric pH (pHi), acid pH and alkaline pH. For crambe and sunflower meals extraction using the pHi method was most efficient in terms of protein yield and crude protein content in the concentrates; this method also increased lysine and methionine content in the concentrates. The water holding capacity of the sunflower protein concentrate was greater than that of the crambe protein concentrate. The crambe protein concentrate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Antinutrients; Aquafeeds; Byproducts; Phenolic compounds; Protein concentration.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502495

Phenolic compounds and anticancer activity of commercial sugarcane cultivated in Brazil
Provedor de dados: 42
Autores: ALVES,VANESSA G.; SOUZA,ALAN G.; CHIAVELLI,LUCAS U.R.; RUIZ,ANA L.T.G.; CARVALHO,JOÃO E.; POMINI,ARMANDO M.; SILVA,CLEUZA C.
ABSTRACT The cultivation of sugarcane hybrids (X Saccharum officinarum L.) is an important revenue source for the Brazilian economy. Herein it is reported the evaluation of the cytotoxic activity of mid-polarity sugarcane extracts against human cancer cell lines, as well as the isolation of steroids sitosterol, stigmasterol and campesterol, phenolic acids p-hydroxybenzoic, p-hydroxycinnamic, vanillic and ferulic acid, terpenoids α-tocopherol and β-carotene and a novel substance in sugarcane, the flavonoid aglycone tricin (5,7,4-trihydroxy-3,5-dimethoxyflavone). The presence of large amounts of phenolic acids and the flavonoid tricin may explain the cytostatic activity observed for the mid-polarity crude extract and filtrates.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anticancer activity; Phenolic compounds; Saccharum officinarum L.; Sugarcane.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401201

Evaluation of antioxidant activity of grapevine leaves extracts (Vitis labrusca) in liver of Wistar rats
Provedor de dados: 42
Autores: SCHAFFER,THAYS K.; WOHLENBERG,MARIANE F.; MEDEIROS,NIARA; MARTINS,JÉSSICA B.; AGOSTINI,FABIANA; FUNCHAL,CLÁUDIA; DANI,CAROLINE.
The aim of this study was to evaluate the hepatoprotection of organic and conventional grapevine leaves extract (Vitis labrusca). The total polyphenol content and the isolate polyphenols by HPLC were evaluate. The animals received intraperitoneal injections of saline or extracts (conventional or organic - 30 mg/kg) for 14 days. On day 15, the rats received carbon tetrachloride (CCl4) or mineral oil (i.p.). After 4h, the animals were euthanized. The analysis of the liver enzymes activity (AST, ALT, GGT) was performed using serum, obtained by blood and the levels of lipid peroxidation (TBARS), protein oxidation (carbonyl), and the activity of antioxidant enzymes superoxide dismutase and catalase were analyzed in the liver. The results showed that the organic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oxidative stress; Carbon tetrachloride; Hepatoprotection; Grapes; Phenolic compounds.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100187

Jabuticaba (Plinia jaboticaba) skin extracts as inhibitors of phospholipases A2 and proteases
Provedor de dados: 42
Autores: MARQUES,TAMARA R.; BRAGA,MARIANA A.; CESAR,PEDRO H.S.; MARCUSSI,SILVANA; CORRÊA,ANGELITA D.
Abstract: The phenolic extracts of jabuticaba skin flour (JSF) were characterized by HPLC, and evaluated for their modulating action upon phospholipases A2 and proteases of snake venom, aiming at their possible use in the treatment of the various diseases associated with the action of venom toxins. Two types of extracts were prepared from JSF: aqueous and methanolic. These extracts, evaluated at different ratios, (venom: extract, m/m), significantly inhibited the phospholipase activity induced by the venom of Bothrops moojeni and Crotalus durissus terrificus, except for Bothrops atrox venom. The greatest hemolysis inhibitory action was observed for the methanolic extract, when incubated with venoms of B. moojeni and C. durissus terrificus, with inhibitions...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agro-industrial waste; Phenolic compounds; Venom enzymes as laboratory tools; Clotting; Thrombolysis.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300613

Phenolic profiles of nectar and honey of Quillaja saponaria Mol. (Quillajaceae) as potential chemical markers
Provedor de dados: 48
Autores: Montenegro,Gloria; Díaz-Forestier,Javiera; Fredes,Carolina; Rodríguez,Sharon.
Quillaja saponaria Mol. (Quillajaceae) is one of the most important melliferous species in Chile, mainly as a source of monofloral honey. Honey made by A. mellifera presents biological activity against pathogens and antioxidant capacity associated with the presence of phenolic compounds deriving from the nectar, as a result of bee honey foraging. The aim of this study was to identify and quantify the phenolic compounds from the floral nectar of Q. saponaria and the honey made in apiaries in the central zone, and compare the composition of the chromatographic profiles of nectar and honey to known phenolic compounds. The results obtained by HPLC-DAD (high-performance liquid chromatography with diode-array detection) showed a similar profile of phenolic...
Tipo: Journal article
Palavras-chave: Apis mellifera; Chromatographic profile; Floral nectar; Honey; Phenolic compounds; Quillaja saponaria.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000200009

Biological properties of the Chilean native moss Sphagnum magellanicum
Provedor de dados: 48
Autores: MONTENEGRO,GLORIA; PORTALUPPI,MARIANA C; SALAS,FRANCISCO A; DÍAZ,MARÍA F.
An ethanol extract prepared from the gametophyte Chilean native moss Sphagnum magellanicum was dried out, weighed and dissolved in distilled water. This extract was then assayed for its antibacterial activity against the G(-) bacteria Azotobacter vinelandii, Erwinia carotovora subsp. carotovora, Enterobacter aerogenes, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Vibrio cholerae, and the G(+) bacteria Staphylococcus aureus subsp. aureus, and Streptococcus type b. The growth of the cultures of E. carotovora subsp. carotovora, and V. cholerae was inhibited at a concentration of 581mg/ml of extract, while the cultures of E. coli, S. typhi and Streptococcus type b were inhibited at a concentration of 1.16 mg/mL of extract. The concentration of...
Tipo: Journal article
Palavras-chave: Sphagnum magellanicum; Phenolic compounds; Antibacterial activity; MIC.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200012

Defense mechanisms of Solanum tuberosum L. in response to attack by plant-pathogenic bacteria
Provedor de dados: 48
Autores: POIATTI,VERA A D; DALMAS,FERNANDO R; ASTARITA,LEANDRO V.
The natural resistance of plants to disease is based not only on preformed mechanisms, but also on induced mechanisms. The defense mechanisms present in resistant plants may also be found in susceptible ones. This study attempted to analyze the metabolic alterations in plants of the potato Solanum tuberosum L. cv. Agata that were inoculated with the incompatible plant-pathogenic bacteria X. axonopodis and R. solanacearum, and the compatible bacterium E. carotovora. Levels of total phenolic compounds, including the flavonoid group, and the activities of polyphenol oxidase (PPO) and peroxidase (POX) were evaluated. Bacteria compatibility was evaluated by means of infiltration of tubers. The defense response was evaluated in the leaves of the potato plants....
Tipo: Journal article
Palavras-chave: Flavonoids; Hypersensitive response; Peroxidases; Phenolic compounds.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200009

Protective effect of Hypericum calabricum Sprengel on oxidative damage and its inhibition of nitric oxide in lipopolysaccharide-stimulated RAW 264.7 macrophages
Provedor de dados: 48
Autores: Statti,Giancarlo A; Conforti,Filomena; Menichini,Federica; Marrelli,Mariangela; Gangale,Carmen; Tundis,Rosa; Loizzo,Monica R; Bonesi,Marco; Menichini,Francesco.
The present study shows for the first time the phenolic composition and the in vitro properties (antioxidant and inhibition of nitric oxide production) of Hypericum calabricum Sprengel collected in Italy. The content of hypericins (hypericin and pseudohypericin), hyperforin, flavonoids (rutin, hyperoside, isoquercetrin, quercitrin, quercetin and biapigenin) and chlorogenic acid of H. calabricum, have been determined. The ethyl acetate fraction from the aerial parts of H. calabricum exhibited activity against the radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) with IC50 value of 1.6 jig/ml. The test for inhibition of nitric oxide (NO) production was performed using the murine monocytic macrophage cell line RAW 264.7. The ethyl acetate fraction had significant...
Tipo: Journal article
Palavras-chave: Antiradical activity; Hypericaceae; Hypericum calabricum Sprengel; Phenolic compounds.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000300001

Antiulcerogenic activity of Indigofera truxillensis Kunth
Provedor de dados: 49
Autores: Cola-Miranda,Maira; Barbastefano,Victor; Hiruma-Lima,Clélia Akiko; Calvo,Tamara Regina; Vilegas,Wagner; Brito,Alba Regina Monteiro Souza.
The genus Indigofera (Fabaceae) is used in folk medicine to treat gastrointestinal pain. In this study, we investigated the antiulcerogenic properties of Indigofera truxillensis Kunth. Oral administration of MeOH extract did not produce any signals of acute toxicity. The antiulcerogenic activity was assessed in different models of acute gastric ulcers (100% ethanol, piroxicam 30 mg.kg-1, hypothermic restraint stress and pylorus ligature) in mice and rats. The animals were treated with the drugs lanzoprazole (30 mg.kg-1) or cimetidine (100 mg.kg-1) as positive controls depending on the performed model. In another experiment with ethanol-induced ulcers in rats, N-ethylmaleimide (NEM), a sulfhydryl group blocker, was also used. The MeOH extract, at doses of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antiulcerogenic activity; Fabaceae; Indigofera truxillensis Kunth; Medicinal plant; Phenolic compounds.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032006000300004

Controlled atmosphere maintains native and cultivated yerba mate quality during shelf life after long-term storage
Provedor de dados: 53
Autores: Thewes,Fabio Rodrigo; Brackmann,Auri; Schultz,Erani Eliseu; Machado,Eduardo Perkovski; Ludwig,Vagner; Santos,Luana Ferreira dos.
ABSTRACT Yerba mate shows social and economic importance for the Southern Latin American countries due to its easy production and large market range. However, there is a problem to harvest the yerba mate at the correct period and to store it until processing and marketing. Thus, the aim of this paper was to evaluate the interaction among the storage in controlled atmosphere, effect of cultivation form and shelf life period on yerba mate quality after long-term controlled atmosphere storage. The experiment was conducted in a factorial arrangement (3 controlled atmosphere conditions × 2 cultivation forms × 4 weeks of shelf life). Native yerba mate, stored under controlled atmosphere, showed higher chlorophyll concentration as compared to the cultivated one....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ilex paraguariensis; Coloration; Chlorophyll concentration; Carotenoids; Phenolic compounds.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200230

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

Production of grape juice powder obtained by freeze-drying after concentration by reverse osmosis
Provedor de dados: 52
Autores: Gurak,Poliana Deyse; Cabral,Lourdes Maria Correa; Rocha-Leão,Maria Helena.
This study aimed to evaluate the freeze-drying process for obtaining grape juice powder by reverse osmosis using 50% grape juice pre-concentrated (28.5 °Brix) and 50% hydrocolloids (37.5% maltodextrin and 12.5% arabic gum). The morphology of the glassy food showed the absence of crystalline structure, which was the amorphous wall that protected the contents of the powder. The samples were stored in clear and dark containers at room temperature, evaluated for their physical (X-ray diffraction) for 65 days and chemical (polyphenol content) stability for 120 days. During the storage time in plastic vessels, samples remained physically stable (amorphous) and the phenolic concentration was constant, indicating the potentiality of this technique to obtain a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Maltodextrin; Arabic gum; X-ray diffraction; Scanning electron microscopy.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000600017

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

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

Antioxidant properties of Spirulina (Arthospira) platensis cultivated under different temperatures and nitrogen regimes
Provedor de dados: 52
Autores: Colla,Luciane Maria; Furlong,Eliana Badiale; Costa,Jorge Alberto Vieira.
The main aim of this work was to investigate the effects of temperature and nitrogen concentration on the antioxidant potential of extracts from Spirulina (Arthospira) platensis biomass. S. platensis biomass obtained at 35ºC and with 1.875 g.L-1 or 2.5 g.L-1 of sodium nitrate in the culture medium presented higher concentrations of phenolic compounds. The antioxidant potential of methanol extracts of biomass on the enzymatic browning caused by peroxidase were 29 and 35%, respectively, being the reduction related to the amount of phenolic compounds present in this extract.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant; Phenolic compounds; Spirulina (Arthospira) platensis.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100020

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

Yellow passion fruit seed oil (Passiflora edulis f. flavicarpa): physical and chemical characteristics
Provedor de dados: 52
Autores: Malacrida,Cassia Roberta; Jorge,Neuza.
The aim of this study was to determine the chemical composition -physico-chemical properties, fatty acid and tocopherol compositions and total phenolic compounds -and evaluate the radical-scavenging activity of crude oil extracted from passion fruit (Passiflora edulis f. flavicarpa) seeds, aiming to use the agro-industrial by-products. The oil seed extraction was performed by Soxhlet method and the oil yield from the seeds was 30.39%. The oil showed high levels of unsaturated fatty acids (87.59%), including mainly linoleic (73.14%) and oleic (13.83%) acids, tocopherol (499.30 mg/kg) and phenolic compounds (1,314.13 mg GAE/kg). The physico-chemical characteristics were similar to those of other edible oils and the oil showed significant antioxidant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passiflora edulis; Seed oil; Fatty acids; Tocopherols; Phenolic compounds.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000100016

Influence of carvacrol and thymol on the physiological attributes, enterotoxin production and surface characteristics of Staphylococcus aureus strains isolated from foods
Provedor de dados: 58
Autores: Souza,E.L.; Oliveira,C.E.V.; Stamford,T.L.M.; Conceição,M.L.; Gomes Neto,N.J.
This study evaluated the influence of the phenolic compounds carvacrol (CAR) and thymol (THY) on some physiological characteristics and on the modulation of the secretion of some staphylococcal virulence factors, that is, coagulase and enterotoxin. This study also investigated possible mechanisms for the establishment of the anti-staphylococcal activity of these compounds. Sublethal concentrations (0.3 and 0.15 µL/mL) of CAR and THY inhibited the activity of the enzymes coagulase and lipase and led to a decrease in salt tolerance. At the tested sublethal concentrations, both CAR and THY led to a total suppression of enterotoxin production. The loss of a 260-nm-absorbing material and an efflux of potassium ions occurred immediately after the addition of CAR...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Physiological suppression; Staphylococcal enterotoxins; Virulence.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100004

Optimizing a culture medium for biomass and phenolic compounds production using Ganoderma lucidum
Provedor de dados: 58
Autores: Zárate-Chaves,Carlos Andrés; Romero-Rodríguez,María Camila; Niño-Arias,Fabián Camilo; Robles-Camargo,Jorge; Linares-Linares,Melva; Rodríguez-Bocanegra,María Ximena; Gutiérrez-Rojas,Ivonne.
The present work was aimed at optimizing a culture medium for biomass production and phenolic compounds by using Ganoderma lucidum. The culture was optimized in two stages; a Plackett-Burman design was used in the first one for identifying key components in the medium and a central composite design was used in the second one for optimizing their concentration. Both responses (biomass and phenolic compounds) were simultaneously optimized by the latter methodology regarding desirability, and the optimal concentrations obtained were 50.00 g/L sucrose, 13.29 g/L yeast extract and 2.99 g/L olive oil. Maximum biomass production identified in these optimal conditions was 9.5 g/L and that for phenolic compounds was 0.0452 g/L, this being 100% better than that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medium optimization; Ganoderma lucidum; Plackett-Burman; Central composite design; Phenolic compounds.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100032

In vitro evaluation of Mucuna pruriens (L.) DC. antioxidant activity
Provedor de dados: 60
Autores: Longhi,Joy Ganem; Perez,Elisa; Lima,Jair José de; Cândido,Lys Mary Bileski.
Mucuna pruriens (L). Dc is a plant of the Fabaceae family, commonly known as velvet bean, itchy bean, chiporro bean, mucuna, among others. This plant has several medicinal properties, including its potential to treat Parkinson's disease (PD). International studies have shown that this plant surpasses the benefits of the substance levodopa in the treatment of PD. Taking into account that nerve cells are highly sensitive to oxidative substances, this study evaluated the antioxidant activity of mucuna and compared it to that of levodopa. The plant seeds' phenolic concentration was quantified by using the Folin-Denis reagent and the antioxidant activity assays were performed by using three different methods: the reduction of the phosphomolybdenium complex, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mucuna pruriens; Antioxidant; Phenolic compounds.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000300011

Determination of phenolic and triterpenic compounds in Jatropha gossypiifolia L by Ultra-high performance liquid chromatography-tandem mass spectrometric (UHPLC-MS/MS)
Provedor de dados: 60
Autores: Silveira,Rudinei da Silva; Leal,Gabriela Camera; Molin,Thais Ramos Dal; Faccin,Henrique; Gobo,Luciana Assis; Silveira,Géssica Domingos da; Souza,Mariana Tatsch da Silva; Lameira,Osmar Alves; Carvalho,Leandro Machado de; Viana,Carine.
This work describes the chemical characterization of extracts of Jatropha gossypiifolia (from Amazonia region) concerning the presence of phenolic and triterpenic compounds using Ultra High Perfomance Liquid chromatography coupled to Mass Spectrometry in Tandem (UHPLC-MS/MS) methods. The studied compounds belong to the most frequently found classes in medicinal plants (triterpenes, flavonoids, flavones, hydroxycinnamic acids, coumarins, catechins and stilbenes), which have been analyzed as chemical and bioactive markers in hydroethanolic and aqueous extracts. Several polyphenolic compounds identified herein are unprecedented in the scientific literature for this species. The chemical markers identified and quantified in the studied extracts of J....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha gossypiifolia L; UHPLC-MS/MS; Phenolic compounds; Triterpenic compounds.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100539

Morpho-anatomical characters of the leaf and stem of Mandevilla coccinea (Hook. et Arn.) Woodson, Apocynaceae
Provedor de dados: 60
Autores: Duarte,Márcia do Rocio; Larrosa,Carina Rau Rivas.
Mandevilla coccinea (Hook. et Arn.) Woodson, Apocynaceae is a herb native to South America employed in folk medicine as an analgesic, anti-inflammatory and to inhibit snake venom effects. This work was carried out to study the morpho-anatomical characters of the leaf and stem in order to advance knowledge on this medicinal plant and on pharmacognostic quality control. The plant material was fixed and prepared according to light and scanning electron microtechniques. Its leaves are simple, alternate and ovate-obovate. The epidermis is uniseriate and coated with a thick and striate cuticle. The stomata are paracytic and occur on both foliar surfaces. The dorsiventral-like mesophyll has a sub-epidermal parenchymatic layer containing phenolic substances and is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mandevilla coccinea (Hook. et Arn.) Woodson/pharmacognosy; Mandevilla coccinea (Hook. et Arn.) Woodson/morpho-anatomical characters; Apocynaceae/pharmacognosy; Medicinal plants/pharmacognostic quality control; Phenolic compounds.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000100017

Enzymes modulation by dried grape pomace from the manufacture of wines and juices
Provedor de dados: 60
Autores: Freire,Juliana Mesquita; Barroso,Amanda Ribeiro; Assis,Amanda Araújo de; Texeira,Bruna Helena; Braga,Jonatas Henrique Guimarães; Oliveira,Daniela Aparecida; Braga,Mariana Aparecida; Marcussi,Silvana.
The processing of grapes for the manufacture of juices and wines, generates large quantities of by-products rich in metabolites with antioxidant, antimicrobial, anti-inflammatory and cicatrizing activities. The high homology between human enzymes and snake venoms makes the latter valuable laboratory tools for the study of pathophysiological processes. Proteases and phospholipases A2 act in processes related to hemostasis and inflammatory response. Thus, in this work, dried pomace obtained from grape (Isabel, Niagara, Bordô, BRS Violeta and Blend cultivars) processing were evaluated on phospholipase, proteolytic, hemolytic and thrombolytic activities induced by snakes venoms and the content of phenolic compounds and minerals was evaluated. The dried pomace...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grape extracts; Industrial wastes; Phenolic compounds; Protease modulators; Phospholipase A2 modulators.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100609

Inhibition of DNA virus: Herpes-1 (HSV-1) in cellular culture replication, through an antioxidant treatment extracted from rosemary spice
Provedor de dados: 60
Autores: Mancini,Dalva Assunção Portari; Torres,Rosângela Pavan; Pinto,José Ricardo; Mancini-Filho,Jorge.
This work aimed to evaluate antiviral properties in antioxidants from spices. Phenolic compounds extracted from rosemary (Rosmarinus officinallis, L) by hot water, had their antioxidant activity determined by spectrophotometry using β carotene/linoleic acid system. The rosemary extract was evaluated by antiviral assay of Herpes Virus type-1 (HSV-1) replication in VERO cells, in the presence or absence of the spice. 10,000 TCID50/mL of the HSV-1 was kept for 3 h at 4º C, with 300 ppm of rosemary extract, and 100 ppm of butyl hydroxyl toluene (BHT). Then, these viruses were inoculated in VERO cells incubated at 37º C in CO2-5 %, for seven days. Daily, they were examined and the end point was based on 100% of CPE in virus control (without antioxidants). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural antioxidants; Virus replication; Phenolic compounds; Herpesvirus; Rosemary.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000100016

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 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

Physical and Chemical Characterization of Melia azedarach L. Fruit and Leaf for Use as Botanical Insecticide
Provedor de dados: 117
Autores: Chiffelle G,Italo; Huerta F,Amanda; Lizana R,Diego.
A study was undertaken of the physical and chemical characteristics and insecticide properties of melia (Melia azedarach L.) (Meliaceae) fruit and leaves; melia has been introduced in Chile for ornamental purposes. The physical and chemical properties were evaluated in two stages of fruit and leaf maturity, i.e., green /mature, and mature/juvenile, respectively. Laboratory bioassays were carried out on Drosophila melanogaster Meigen (Diptera: Drosophilidae) as an insect model. The diameter of M. azedarach fruit was in the lower limit in relation to other studies. The flour obtained from green fruit had an average dry weight inferior to that of mature fruit. The average dry leaf weights were similar in both juvenile and mature states. The green fruits had...
Tipo: Journal article
Palavras-chave: Chinaberry tree; Meliaceae; Phenolic compounds.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100005

Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars
Provedor de dados: 118
Autores: Yañez-Mansilla,Erwin; Cartes,Paula; Reyes-Díaz,Marjorie; Ribera-Fonseca,Alejandra; Alberdi,Miren.
Nitrogen (N) is an essential nutrient for photosynthesis and may influence phenolic compound synthesis in higher plants. The effect of different amounts of N (0 to 38 mM) provided on a short-term (4 d) basis on the photosynthetic and antioxidant performance of highbush blueberry cultivars (Legacy and Bluegold) grown in a nutrient solution was studied. In both cultivars, the N concentration of leaves slightly increased in response to the N supply, with Bluegold frequently showing higher N concentrations than Legacy. Photosynthesis was reduced in Bluegold at the highest N dose, whereas in Legacy, a decrease of CO2 assimilation occurred under N starvation. This decrease in photosynthesis was accompanied by enhanced lipid peroxidation but only in Bluegold. In...
Tipo: Journal article
Palavras-chave: Nitrogen; Oxidative damage; Phenolic compounds; Superoxide dismutase; Vaccinium corymbosum.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100006

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

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

Long-term maintenance of in vitro cultures affects growth and secondary metabolism of St. John's Wort
Provedor de dados: 65
Autores: Figueiró,Adriana de Andrade; Correa,Cynthia Manira; Astarita,Leandro Vieira; Santarém,Eliane Romanato.
Hypericum perforatum is a traditional medicinal plant with wound healing and antidepressant properties. Efficiency of micropropagation is often related to the long term maintenance of tissues in culture, which may alter the secondary metabolism of plants. The objective of this study was to evaluate growth and secondary metabolism of in vitro shoots of H. perforatum on short and long term maintenance of cultures (30 and 100 days). The effect of BA and NAA supplementation was evaluated during 30 days of culture. Adventitious shoots were cultivated on MS medium supplemented with 4.4mM BA alone or in combination with 0.05mM NAA for 30 days. A hormone-free medium was used as control. Shoots cultivated for 100 days were maintained in presence of 4.4mM BA....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tissue culture; Hypericum perforatum; Hypericin; Phenolic compounds.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010001000010

Salicylic acid on antioxidant activity and betacyan in production from leaves of Alternanthera tenella
Provedor de dados: 65
Autores: Rodrigues-Brandão,Isabel; Kleinowski,Alítcia Moraes; Einhardt,Andersom Millech; Lima,Milene Conceição; Amarante,Luciano do; Peters,José Antonio; Braga,Eugenia Jacira Bolacel.
This research investigates effects of salicylic acid (an abiotic elicitor) on the antioxidant activity and betacyan production from leaves of Alternanthera tenella cultured in vitro was evaluated. Plants were grown in a liquid MS medium and vermiculite substrate. After 35 days salicylic acid was added to the medium. Content of betacyanins, total phenols and flavonoids and non-enzymatic antioxidant capacity were determined in leaves of A. tenella after 0, 12, 36 and 48h of treatment. After 36h, concentration of betacyanins and total phenols increased. On the other hand, the increase of the treatment time caused a slight decrease in total flavonoids and reduced the DPPH free radical activity. As result the antioxidant activity of the leaves of A. tenella is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternanthera tenella; DPPH; Total flavonoids; Phenolic compounds; Betacyanins.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001001893

Phytochemical screening and antimicrobial activity testing of crude hydroalcoholic extract from leaves of Sphagneticola trilobata (Asteraceae)
Provedor de dados: 65
Autores: Leite,Ana Greice Borba; Farias,Eulina Tereza Nery; Oliveira,Ana Paula de; Abreu,Ruan Emmanuell Franco de; Costa,Mateus Matiuzzi da; Almeida,Jackson Roberto Guedes da Silva; Estevão,Lígia Reis de Moura; Evêncio-Neto,Joaquim.
ABSTRACT:  This study aimed to perform phytochemical analysis and to test the antimicrobial activity of the crude hydroalcoholic extract obtained from the leaves of Sphagneticola trilobata. Classes of secondary metabolites present in the extract were identified through phytochemical screening using analytical thin-layer chromatography. Antimicrobial activity was evaluated by testing cultures of Staphylococcus aureus, S. epidermidis, Staphylococcus spp., Escherichia coli, Serratia marcescens, Enterococcus faecalis, Pseudomonas aeruginosa, Salmonella Typhimurium, and Klebsiella pneumoniae isolated from human skin and those of Staphylococcus spp. isolated from dog skin using the broth microdilution method. In the phytochemical screening, classes of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial; Phytochemical Screening; Phenolic compounds.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400452

Relationship between chemical components, bacterial adherence and in vitro fermentation of tropical forage legumes
Provedor de dados: 64
Autores: Fluck,Ana Carolina; Kozloski,Gilberto Vilmar; Martins,Andressa Ana; Mezzomo,Mariana Patricia; Zanferari,Filipe; Stefanello,Simone.
Inclusion of forage legumes in diet may improve tropical ruminant systems productivity and sustainability. However, it is not well stablished which chemical components more impact their nutritional value. The relationship between chemical composition and in vitro fermentation of tropical forage legume was evaluated with the objective of obtaining indicators of their nutritional value. Samples of Crotalaria spectabilis, Cajanus cajan, Macrotyloma axillare, Mucuna aterrina, Stylosantis sp. and Canavalia ensiformis, cut from plants at growth age between 47 to 110 days, were analysed. Total gas production showed negative correlation (P&lt;0.05) with total N (R=-0.51), acid detergent fibre (ADF, R=-0.62) and acid detergent lignin (ADL, R=-0.65), and positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gas production; Lignin; Nutritional value; Phenolic compounds; Tannins.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500010

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

Domestic processing and storage on the physical-chemical characteristics of acerola juice (Malpighia glabra L.).
Provedor de dados: 64
Autores: Dala-Paula,Bruno Martins; Santos,Taís Pereira dos; Araújo,Laura de Souza; Bastos,Renata Rosane Andrade; Moraes,Juliana de Oliveira; Carbonera,Nádia.
ABSTRACT Acerola is a tropical fruit that stands out for its high content of ascorbic acid and phenolic compounds. However, there is currently a lack of information on the effects of the preparation and domestic storage of fruit juices, especially that of acerola. The objective of this work was to evaluate the effect of different liquefying times (10, 30 and 50 s) and cold storage at 4 °C for 0, 24, 48 and 72 h in domestic acerola juice. In relation to such, physicochemical determinations were performed, including pH, total titratable acidity, antioxidant potential, contents of phenolic compounds and total flavonoids in juices produced from the whole fruit, the pulp and acerola seed extracts. Whole fruit juice, liquefied for 10 s, had the highest pH and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant potential; Phenolic compounds; Flavonoids.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100405