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| Registros recuperados: 72 | |
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| Peña,JEM; Vieira,SL; López,J; Reis,RN; Barros,R; Furtado,FVF; Silva,PX. |
| The aim of this study was to evaluate the effects of increasing doses of ascorbic acid (AA) and citric flavonoids (quercetin and rutin) on the performance and meat quality characteristics of broilers submitted to cyclic heat stress. Four-hundred one-day-old female Ross 308 were housed in 40 battery cages a in temperature controlled room. Treatments consisted of 0, 250, 500, and 1000 g/ton on of AA + citric flavonoids. Birds were fed ad libitum until 32 day of age. Beginning on day 14 post-hatch until the end of the experiment, in order to simulate cyclic heat stress, the temperature inside the room was increased to 32°C for 5 hours, and decreased until reaching the comfort temperature corresponding to the age of the animals. Birds were slaughtered at 33... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbic acid; Broiler; Heat stress; Flavonoids. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200008 |
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| Ywassaki,Larissa Akemi; Canniatti-Brazaca,Solange Guidolin. |
| Citric fruits - in natura, as frozen pulp or even as juice - are one of the most important Brazilian exportation products. They are a source of ascorbic acid - a potent antioxidant, and pectin, which is used in the food industry and is an important dietary fiber. This project aims to quantify ascorbic acid and pectin contents in citric fruits, commercial oranges and tangerines, comparing them in sizes and varieties. Ascorbic acid amount was measured in juice comparing sizes, varieties and storage conditions, using a tritimetric method with 2.6-dichlorobenzenoindophenol indicator. Total and soluble pectin in each part of the fruits (peel, albedo, pulp and juice) were quantified using the polygalacturonic acid as a standard. Differences were found between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Orange; Tangerine; Pectin; Ascorbic acid; Composition; Size. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000200007 |
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| Silva,Roberta Abrami Monteiro; Pacheco,Graziela Drociunas; Vinokurovas,Sylvia Luiza; Oliveira,Eduardo Raele de; Gavioli,David Fernandes; Lozano,Arturo Pardo; Agostini,Piero da Silva; Bridi,Ana Maria; Silva,Caio Abércio da. |
| Objetivou-se neste estudo avaliar a inclusão de ractopamina e sua associação com as vitaminas antioxidantes C e E em dietas de suínos em terminação durante 28 dias antes do abate sobre o desempenho, as características de carcaça e a qualidade da carne. Quarenta e oito suínos da linhagem Agroceres PIC (24 machos castrados e 24 fêmeas) foram distribuídos em delineamento experimental de blocos casualizados, em esquema fatorial 3x2, com três dietas: controle; controle + 10ppm de ractopamina; controle + complexo (0,05%) de ractopamina com vitaminas antioxidantes (10ppm de ractopamina + 200mg de vitamina E + 100mg de vitamina C kg-1 de ração) e dois gêneros (machos castrados e fêmeas). Foram avaliados o consumo de ração, o ganho de peso e a conversão alimentar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ácido ascórbico; Agonista beta-adrenérgico; Tecido adiposo; Tocoferol; Ascorbic acid; B-adrenergic agonist; Adipose tissue; Tocoferol. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200311 |
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| LEDO, A. da S.; LAMEIRA, O. A.; BENBADIS, A. K.; MENEZES, I. C. de; OLIVEIRA, M. do S. P. de; LEDO, C. A. da S.. |
| O objetivo do presente trabalho foi avaliar a eficiência da adição de antioxidantes no meio de cultura e o efeito nos estádios de desenvolvimento de inflorescências de açaizeiro (Euterpe oleracea Mart.), sobre a intensidade de oxidação de explantes cultivados in vitro. As atividades foram realizadas no Laboratório de Recursos Genéticos e Biotecnologia da Embrapa Amazônia Oriental, Belém (PA). Os segmentos de ráquilas, obtidos de inflorescências de açaizeiro previamente desinfestadas, foram inoculados em tubos de ensaio contendo meio de cultura de MS (Murashige & Skoog. 1962), sólido e líquido, com 3 % de sacarose, suplementado com diferentes antioxidantes. As culturas foram mantidas em sala de crescimento sob ausência total de luz. Aos 15 dias após a... |
| Tipo: Artigo de periódico |
Palavras-chave: Açaí de touceira; Açaí da várzea; Açaí verdadeiro; Carvão ativado; Explantes; Ácido ascórbico; Antioxidantes; Carbono activado; Cultivo in vitro; Inflorescencias; Micropropagación; Polivinilpirrolidona.; Micropropagação; Açaí; Euterpe oleracea; Cultura in vitro; Explante; Inflorescência; Antioxidante; Vitamina C; Micropropagation; In vitro culture; Explants; Inflorescences; Antioxidants; Ascorbic acid; Activated carbon; Polyvinylpyrrolidone.. |
| Ano: 2001 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1053098 |
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| GONÇALVES,NIGÉRIA PEREIRA; LUCENA,ELISEU MARLÔNIO PEREIRA DE; BONILLA,ORIEL HERRERA; SILVEIRA,MÁRCIA RÉGIA SOUZA DA; TAVARES,FRANCISCA JÉSSICA COSTA. |
| ABSTRACT Fruits provide not only essential nutrients for food, but also bioactive compounds that promote health benefits and help reducing the risk of developing non-communicable chronic diseases. In this sense, this work aimed at quantifying bioactive compounds during the maturation of four fruits native to the Restinga forest of Ceara. Myrtle fruits (Eugenia punicifolia (Kunth) DC.) were collected at the Botanical State Park of Ceara, Caucaia-CE, and guajiru (Chrisobalanus icaco L.), manipuça (Mouriri cearensis Huber) and murici-pitanga fruits (Byrsonima gardneriana A. Juss.) at the Botanical Garden of São Gonçalo, São Gonçalo do Amarante-CE. Fruits were collected at different stages (E) and transported to the Laboratory of Plant Ecophysiology, being... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbic acid; Chlorophyll; Carotenoids; Anthocyanins; Yellow flavonoids. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000500303 |
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| Gonçalves,Jamile F.; Becker,Alexssandro G.; Cargnelutti,Denise; Tabaldi,Luciane A.; Pereira,Luciane B.; Battisti,Vanessa; Spanevello,Rosélia M.; Morsch,Vera M.; Nicoloso,Fernando T.; Schetinger,Maria R.C.. |
| In this study, the effects of cadmium (Cd) on lipid peroxidation, electrolyte leakage, protein oxidation, ascorbate peroxidase (APX; E.C. 1.11.1.11), catalase (CAT; E.C. 1.11.1.6) and superoxide dismutase (SOD; E.C. 1.15.1.1) activities, and ascorbic acid, non-protein thiol groups and total soluble protein contents in cucumber seedlings (Cucumis sativus L.) were investigated. Seedlings were grown in vitro in an agar-solidified substrate containing four Cd levels as CdCl2 (0, 100, 400, and 1000 µmol L-1) for 10 d. The lowest Cd level decreased the malondialdehyde concentration. Electrolyte leakage increased only at 1000 µmol Cd L-1, whereas protein oxidation and total soluble protein content were enhanced at 400 and 1000 µmol Cd L-1. Activity of APX was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant enzymes; Ascorbic acid; Cucumis sativus; Heavy metal; Lipid peroxidation; Protein oxidation. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000300006 |
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| Cordenunsi,Beatriz; Saura-Calixto,Fulgêncio; Diaz-Rubio,Maria Elena; Zuleta,Angela; Tiné,Marco Aurélio; Buckeridge,Marcos Silveira; Silva,Giovanna Bezerra da; Carpio,Cecilia; Giuntini,Eliana Bistriche; Menezes,Elizabete Wenzel de; Lajolo,Franco. |
| Brazil is the third largest producer of pineapple (Ananas comosus) and the market for fresh pineapple is sustained by the Hawaii and Perola cultivars. In this work the Perola cultivar was divided into three main parts, shell, core and pulp, for characterization. Moisture in the pulp was higher (between 10 and 15%) than in the shell and core. The amount of protein was higher in the core (35%) than in the pulp and shell. Perola contained relatively low concentrations of total ascorbic acid in the edible parts, although higher levels of ascorbic acid in the shell. Citric acid corresponded to almost 60% of the total organic acids. The total soluble sugars [~7-12% (FW)] were predominantly sucrose, fructose and glucose. The core had almost twice as much total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pineapple; Perola cultivar; Carbohydrates; Antioxidant activity; Ascorbic acid; Glycemic response. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000100041 |
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| AYÓN-REYNA,Lidia Elena; AYÓN-REYNA,Lourdes Guadalupe; LÓPEZ-LÓPEZ,Martha Edith; LÓPEZ-ANGULO,Gabriela; PINEDA-HIDALGO,Karen Virginia; ZAZUETA-NIEBLA,Jorge Aurelio; VEGA-GARCÍA,Misael Odín. |
| Abstract Pineapple slices were treated with three antioxidants and stored under passive modified atmosphere packaging (MAP) to evaluate the effect of these treatments on tissue browning (percentage of dark area) and the accumulation of ascorbic acid and total phenolics. Pineapple slices were immersed in ascorbic acid (AA), isoascorbic acid (IAA), and N-acetylcysteine (NAC) solutions for 2 min, and then were packed and stored at 5 °C under air (AIR) or MAP for 15 days. Water was used as control. The application of IAA and NAC under passive MAP reduced better the tissue browning index and maintained a good quality of the slices. The use of AA and IAA increased the contents of ascorbic acid and total phenolics. The application of IAA followed by storage under... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fresh-cut; Ascorbic acid; Phenolic compounds; Enzymatic browning; Isoascorbic acid; N-acetylcysteine. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000300531 |
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| Couto,Charlismilã Amorim do; Souza,Eli Regina Barboza de; Morgado,Cristiane Maria Ascari; Ogata,Toshio; Cunha Júnior,Luís Carlos. |
| Abstract This work aimed to evaluate the physicochemical characteristics of different orange cultivars (Citrus sinensis) in order to identify those with potential to the consumer market and/or for processing. Five orange cultivars were evaluated: ‘Natal IAC’, ‘Natal 112’, ‘Pera IAC 2000’, ‘Pera IAC’, ‘Baianinha’ and ‘Pera Rio’, which were harvested at maturation stage considered ideal for commercialization in the “Agência Goiana de Assistência Técnica, Extensão Rural e Pesquisa Agropecuária – EMATER” experimental orchard at the municipality of Anápolis, state of Goiás. After harvesting, fruits were transported to the laboratory, selected, standardized, washed and allowed to dry. Subsequently, skin color, longitudinal and cross-sectional diameter, number... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Orange; Fruit quality; Titratable acidity; Soluble solids; Ascorbic acid; Total extractable polyphenols. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000500302 |
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| Registros recuperados: 72 | |
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