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| Registros recuperados: 100 | |
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| Gallardo Sandoval, Araceli. |
| El arándano azul (Vaccinium ashei Reade) es un producto altamente perecedero, por ello es necesario implementar tecnologías postcosecha que aumenten la vida de anaquel y conserven las propiedades nutrimentales. Dentro de éstas tecnologías se encuentra la luz UV-C (254 nm) que ha sido utilizada en los últimos años en productos hortofrutícolas con la finalidad de reducir la incidencia de microorganismos patógenos y aumentar contenido de fenoles totales. En este estudio, se utilizaron frutos de arándano azul frescos de huertas comerciales de Zacatlán, Puebla, México, que fueron sometidos a tratamientos con luz UV-C en dosis de 1, 3 y 5 kJ m-2 y almacenados por 9 días a temperatura de 24 ºC (60 % de HR) y 4 ºC (80 % de HR) para evaluar la calidad organoléptica... |
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Palavras-chave: Arándano; Luz UV-C; Manejo postcosecha; Antioxidantes; Blueberry; UV-C light; Postharvest handling; Antioxidants; Fruticultura; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1911 |
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| Sánchez Sánchez, Hermilo. |
| En frutos de los híbridos posibles formados con cinco progenitores de chile manzano (Capsicum pubescens R. y P.) provenientes de Huatusco, Perú, Puebla, Tacámbaro y Zongolica, se analizaron las concentraciones de capsaicinoides (capsaicina, nordihidrocapsaicina y dihidrocapsaicina), clorofilas (a y b), vitamina C (ácido ascórbico y dehidroascórbico) y azúcares solubles (estaquiosa, rafinosa, sacarosa, glucosa, galactosa, fructosa y sorbitol), y se registraron los caracteres morfológicos (peso y volumen de fruto, número de semillas, número de lóculos y longitud del pericarpio). Se consideraron las cruzas directas y recíprocas mediante el análisis dialélico del Método I de Griffing, para encontrar los efectos de aptitud combinatoria general y... |
| Tipo: Tesis |
Palavras-chave: Capsicum pubescens; Capsaicinoides; Antioxidantes; Análisis dialélico; Doctorado; Genética; Capsaicinoids; Antioxidants; Diallelic analysis. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1319 |
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| Hiragi,Cássia de Oliveira; Miranda-Vilela,Ana Luisa; Rocha,Dulce Maria Sucena; ,Silviene Fabiana de; Hatagima,Ana; Klautau-Guimarães,Maria de Nazaré. |
| Antioxidants such as superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX1) reduce the oxidation rates in the organism. Gluthatione S-transferases (GSTs) play a vital role in phase 2 of biotransformation of many substances. Variation in the expression of these enzymes suggests individual differences for the degree of antioxidant protection and geographical differences in the distribution of these variants. We described the distribution frequency of CAT (21A/T), SOD2 (Ala9Val), GPX1 (Pro198Leu), GSTM1 and GSTT1 polymorphisms in three Brazilian population groups: Kayabi Amerindians (n = 60), Kalunga Afro-descendants (n = 72), and an urban mixed population from Federal District (n = 162). Frequencies of the variants observed in Kalunga... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidants; PCR-RFLP; Gene polymorphisms; Brazilian ethnicities; Population genetics; Pharmacogenetics. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100003 |
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| Dutra,Elaine S.; Dias,Cristina D.; Araújo,Bethânia C. de; Castro,Antônio J. S.; Nepomuceno,Júlio C.. |
| The consumption of organic tomatoes (ORTs) reduces the risk of harmful effects to humans and the environment caused by exposure to toxic agrochemicals. In this study, we used the somatic mutation and recombination test (SMART) of wing spots in Drosophila melanogaster to evaluate the genotoxicity of ORT and the effect of cotreatment with ORT on the genotoxicity of Doxorubicin ® (DXR, a cancer chemotherapeutic agent) that is mediated by free radical formation. Standard (ST) cross larvae were treated chronically with solutions containing 25%, 50% or 100% of an aqueous extract of ORT, in the absence and presence of DXR (0.125 mg/mL), and the number of mutant spots on the wings of emergent flies was counted. ORT alone was not genotoxic but enhanced the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidants; Co-genotoxicity; Drosophila melanogaster; Organic tomato; SMART. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100020 |
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| SANTIAGO, M. C. P. de A.; NOGUEIRA, R. I.; FREITAS, S. P.; GODOY, R. L. de O.; GOUVÊA, A. C. M. S.; BORGUINI, R. G.; PACHECO, S.. |
| A cultura da romãzeira apresenta um grande apelo comercial devido à possibilidade de obtenção de produtos com características antioxidantes, como, por exemplo, seu suco com elevado teor de antocianinas. As antocianinas são importantes antioxidantes naturais responsáveis pela coloração do suco de romã. A utilização de tecnologias que favoreçam um maior aproveitamento do fruto agrega valor à cultura da romãzeira no Brasil, além de contribuir para disponibilizar produtos alternativos com propriedades potencialmente benéficas à saúde, os quais podem ser aplicados em formulações alimentícias. Este documento tem o objetivo de apresentar as etapas de obtenção de suco de romã por spray drying resultando em um produto em pó com elevada retenção de antocianinas. |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Agente encapsulante; Antocianinas; Compostos bioativos; Antioxidante; Processamento; Tecnologia de Alimento; Food technology; Antioxidants; Food processing; Vegetable products. |
| Ano: 2020 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126529 |
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| Messina, Concetta Maria; Troia, Angelo; Arena, Rosaria; Manuguerra, Simona; Ioannou, Theodora; Curcuraci, Eleonora; Renda, Giuseppe; Hellio, Claire; Santulli, Andrea. |
| n this study we focused on four taxa of the genus Calendula (C. maritima, C. suffruticosa subsp. fulgida, C. arvensis, and the hybrid between the first two ones), collected in Mediterranean area (Sicily). Six extracts for each species were obtained using solvents with increasing polarity (hexane, ethanol 80%, acetone 70%, and water) and through extraction by supercritical fluids (SFE). It has been observed that the solvent with the highest extraction efficiency was ethanol 80% for all species. However, SFE extracts showed high antioxidant activity comparable to the ethanol 80% extract (polyphenol, DPPH, and reducing power method). These findings were confirmed by in vitro analysis (MTT assay) where it was observed that the tested concentration (24 µg/mL),... |
| Tipo: Text |
Palavras-chave: Calendula species; Marigold; Supercritical fluid extraction; Bioactivity; Antioxidants; Polyphenols. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00591/70336/68389.pdf |
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| Seguineau, Catherine; Racotta, Ilie; Palacios, Elena; Delaporte, Maryse; Moal, Jeanne; Soudant, Philippe. |
| In a previous study, dietary supplementation with arachidonic acid (ARA) to oysters Crassostrea gigas increased haemocyte numbers, phagocytosis, and production of reactive oxygen species level (ROS) by haemocytes (Delaporte et al., 2006). To assess if the observed stimulation of these cellular responses resulted from changes of ARA-related prostaglandin (PG) production, we analysed prostaglandin E2 metabolite (PGEM) content on the same oysters fed three levels of ARA. Dietary supply of polyunsaturated fatty acids (PUFA) could also induce an oxidative stress that could similarly increase cellular responses; therefore, two indicators of oxidative stress were analysed: peroxidation level and antioxidant defence status. Together the observed positive... |
| Tipo: Text |
Palavras-chave: Prostaglandins; N-6 unsaturated fatty acids; Lipid peroxidation; Antioxidants; ROS production. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00040/15103/12785.pdf |
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| Sandoval,Cristian; Vásquez,Bélgica; Mandarim-de-Lacerda,Carlos; del Sol,Mariano. |
| Prolonged alcohol consumption has consequences on the liver, producing necrotic precipitates and fibrosis, on the pancreas, causing the pancreatic acini to atrophy and destroying insulin-producing cells, and on the central nervous system (CNS), causing the gray and white matter in the frontal lobes of the brain and cerebellum to atrophy. Generally, alcohol is metabolized via oxidative pathways, where the enzymes alcohol dehydrogenase and aldehyde dehydrogenase participate during its metabolization in the liver and CNS, or via non-oxidative pathways during its metabolization in the pancreas. Ethanol metabolism can produce oxidative stress and tissue damage mediated by free radicals, causing morphological and functional alterations in the liver. In the... |
| Tipo: Journal article |
Palavras-chave: Antioxidants; Ethanol; Liver; Pancreas; Central nervous system. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300024 |
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| Imosemi,I. O. |
| Developmental pathologies may result from endogenous or xenobiotic-enhanced formation of reacting oxygen species (ROS), which oxidatively damage cellular macromolecules and/or alter signal transduction, and that the embryonic processes regulating the balance of ROS formation, oxidative DNA damage and repair, and ROS-mediated signal transduction may be important determinants of teratological risk. ROS can oxidize molecular targets such as DNA, protein, lipid in a process called oxidative stress resulting in cellular dysfunction and in utero death or teratogenicity. This review, consisting of literature search of journals and chapters in books aims at highlighting the importance of the cerebellum in controlling various motor activities in the body, as well... |
| Tipo: Journal article |
Palavras-chave: Cerebellar development; Reacting oxygen species; Oxidative stress; Antioxidants. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000100034 |
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| Paula,Daniella A. J.; Andrade,Estefânia S.; Murgas,Luis D. S.; Felizardo,Viviane O.; Winkaler,Elissandra U.; Zeviani,Walmes; Freitas,Rilke T. F.. |
| This study investigated the addition of antioxidants vitamin E and reduced glutathione on curimba (Prochilodus lineatus) semen cryopreservation and compared sodium bicarbonate solution and distilled water as activators. The experiment was conducted at the environmental station of CEMIG, in Itutinga-MG, Brazil, between December/2009 and January/2010. Semen samples (n = 7) with semen motility above 80% were diluted in cryoprotectant solutions composed of 10% methanol, 15% lactose and containing different concentrations of antioxidants: 50 (VE50), 100 (VE100) and 250 (VE250) µM of vitamin E, and 0.5 (RG0.5), 1.0 (RG1.0) and 1.5 (RG1.5) mM of reduced glutathione. A solution without antioxidants was used as a control. The semen was diluted at a ratio of 1:4... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidants; Fertilization; Freezing; Reproduction; Sperm motility. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000300020 |
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| Ferreira,Daiane; Unfer,Taís Cristina; Rocha,Hélio Carlos; Kreutz,Luiz Carlos; Koakoski,Gessi; Barcellos,Leonardo José Gil. |
| An experiment was conducted to evaluate the potential of honey, propolis, and bee pollen for the reversal of lipid peroxidation induced by tebuconazole (TEB) in South American catfish (Rhamdia quelen), in which the concentration of thiobarbituric acid reactive substances (TBARS), the activity of the antioxidant enzyme glutathione-S-transferase (GST) and the concentrations of non-enzymatic antioxidants, reduced glutathione (GSH), ascorbic acid, and non-protein thiols were assessed. Honey (0.125 g L-1) and bee pollen (0.05 g L-1) added to the water reverse the production of TBARS induced by TEB, while propolis demonstrated a pro-oxidant effect, inducing an increase in TBARS production. The data presented herein suggest that the addition of water to honey and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidants; Bee pollen; Honey; Lipid peroxidation; Propolis; Tebuconazole. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100021 |
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| Registros recuperados: 100 | |
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