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| Registros recuperados: 48 | |
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| Tian,Xun; Ye,Rui; Wang,Jingwen; Chen,Yifei; Cai,Baoguo; Guan,Shimin; Rong,Shaofeng; Li,Qianqian. |
| Background Natural 2-phenylethanol (2-PE) is an important flavoring that emits the aroma of roses. During biotransformation, the aroma quality of natural 2-PE is affected by its main by-products, which include butanol, isobutyric acid, butyric acid, and isovaleric acid. Thus, controlling undesirable by-product formation can reduce the effect of odor on 2-PE aroma quality. Results 2-PE was produced through biotransformation using l-phenylalanine as a substrate and glucose as a carbon source. Ascorbic acid was added to the system to improve the redox reaction and suppress the generation of by-products. Principal component analysis of the aroma quality of 2-PE was performed using an electronic nose. Similarity analysis revealed that the effects of four... |
| Tipo: Journal article |
Palavras-chave: Aroma quality; Ascorbic acid; Biotransformation; By-products; 2-Phenylethanol. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000400005 |
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| Cahu, Chantal; Zambonino, Jose-luis; Takeuchi, Toshio. |
| Marine fish larvae undergo major functional and morphological changes during the developmental stages and several factors can interfere with the normal development of larvae and affect fry quality. Skeletal malformations, such as spinal malformation-scoliosis, lordosis, coiled vertebral column-, missing or additional fin rays, bending opercle or jaw malformations, are frequently observed in hatchery-reared larvae. This paper reviews the effects of some nutritional components on skeletal development in larvae of a number of fish species. In the dietary lipid fraction, for instance, it was proven that the phospholipid concentration affected the spinal malformation rate in sea bass fed a compound diet from mouth opening onwards. Phosphatidylinositol, in... |
| Tipo: Text |
Palavras-chave: Retinoic acid; Ascorbic acid; Amino acid; Phospholipid; Peptides; Skeletal development; Quality; Fish larvae. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-443.pdf |
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| Pereira,Marli Aparecida dos Santos; Liberati,Ana Paula; Souza,Ivan Domicio da Silva; Zanoni,Jacqueline Nelisis. |
| The objective of this work was to evaluate the overall myenteric neurons population from the duodenum of adult streptozotocin-induced diabetic rats supplemented with ascorbic acid (AA), a potent antioxidant. Fifteen 90-day-old rats were divided in groups: control (C), diabetic (D), diabetic treated with ascorbic acid (DA). After 120 days of experimental period duodenums were resected and processed as whole-mount preparations according to Giemsa's technique, which allowed us to evaluate neuronal density in an area of 8.96 mm² and measure the area of 500 neuronal cell bodies per group. It was observed a 32.55% reduction in neuronal density of group D when compared to group C (p<0.05). The density of spared neurons in group DA, in relation to group D, was... |
| Tipo: Journal article |
Palavras-chave: Ascorbic acid; Diabetes mellitus; Duodenum; Oxidative stress. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200017 |
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| Amarante,Cassandro Vidal Talamini do; Souza,Alexandra Goede de; Benincá,Thalita Dal Toé; Steffens,Cristiano André; Ciotta,Marlise Nara. |
| Abstract: The objective of this work was to characterize entire flowers of the feijoa (Acca sellowiana) genotypes 'Alcântara', 'Helena', 'Mattos', 'Nonante', and the accession 2316 for dry matter, total antioxidant activity (TAA), and the contents of soluble solids, ascorbic acid, total anthocyanins, total flavonoids, and total phenolic compounds (TPC), as well as for the petal surface areas and colors. The TAA was quantified by the ABTS and DPPH methods. Flowers of the accession 2316 and of the cultivars Alcântara and Helena showed the highest contents of anthocyanins and flavonoids, as well as the highest values of TPC and TAA. The feijoa genotypes cultivated in Southern Brazil show high contents of soluble solids and represent a natural source of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acca sellowiana; Anthocyanins; Ascorbic acid; Flavonoids; Soluble solids; Total antioxidant activity; Total phenolic compounds. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102701 |
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| Amarante,Cassandro Vidal Talamini do; Souza,Alexandra Goede de; Benincá,Thalita Dal Toé; Steffens,Cristiano André. |
| Abstract: The objective of this work was to evaluate the physicochemical attributes and vitamin C contents of fruits of five Brazilian genotypes of feijoa (Acca sellowiana), at harvest and after cold storage. The Alcântara, Mattos, Helena, and Nonante cultivars, as well as accession 2316, were studied. The assessed attributes were: fresh mass loss, titratable acidity, soluble solids contents, soluble solids contents/titratable acidity ratio, pH, skin and flesh color, texture, and vitamin C contents (skin and flesh). After storage, there were reductions of 2.9% in soluble solids contents, of 32.2% in titratable acidity, and of approximately 85% in texture attributes, besides increases of 36.3% in the soluble solids contents/titratable acidity ratio and of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acca sellowiana; Ascorbic acid; Functional food; Native fruit trees; Natural antioxidant; Postharvest; Soluble solids content. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900734 |
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| Silva,Mariah Benine Ramos; Leite,Rodrigo Santos; Oliveira,Marcelo Álvares de; Ida,Elza Iouko. |
| Abstract: The objective of this work was to evaluate the effects of the germination conditions of 'BRS 216' soybean (Glycine max) on the length, yield, and isoflavone contents of sprouts. A 23 factorial arrangement was used to evaluate the variables soaking time, irrigation frequency, and germination time. Sprouts that showed better length and yield and higher isoflavone contents were evaluated for their chemical composition and vitamin C content. Soaking and germination time of soybean showed a positive and significant linear effect on sprout length. However, only germination time showed a significant positive linear effect on yield, and a significant negative linear effect on the content of malonylglycosides, aglycones, and total isoflavones. Soybean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Aglycones; Ascorbic acid; Proximate composition; Soaking. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2020000104000 |
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| Laganá,C; Ribeiro,AML; Kessler,AM; Kratz,LR; Pinheiro,CC. |
| The objective of this experiment was to evaluate the effect of diet supplementation with vitamins C and E and organic minerals Zn and Se on the performance of 1 to 35 day-old broilers from, kept under cyclic heat stress (25 to 32ºC). Four levels of vitamin-mineral supplementation were used (T1-control diet (60/30 IU of vit E for starter and growing diet, respectively, zero vit. C, 80 ppm of inorganic Zn, 0.3 ppm of inorganic Se); T2-control diet + 100 UI vit E and 300 ppm vit C/kg; T3-control diet + 40 ppm Zn and 0,3 ppm Se/kg; T4-control diet + T2 and T3 levels) and two environments - thermoneutral and cyclic heat stress (TN and HS) from 14 to 35 days of age. In the period when part of the birds was submitted to HS, from 14 to 35 days, it was observed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbic acid; Dl-alpha-tocopherol; Selenium; Thermal regulation; Zinc. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100006 |
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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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| Faria,DE; Junqueira,OM; Souza,PA; Titto,EAL. |
| Three experiments were conducted in a climatic chamber to determine the effects of vitamins D3 and C supplementation on performance, body temperature, and egg quality under thermoneutral temperature (24.8º to 27.0º C), a cyclic heat stress (26.2º C for 16 h and 32.1º C for 8 h) and a constant heat stress (30.0º to 32.0º C) for three weeks in each temperature. One hundred forty-four White Leghorn hens aged 31 weeks were used in a completely randomized design with a factorial arrangement of 3 x 3: vitamin D3 (2,500, 3,000, and 3,500 IU/kg) and vitamin C (0, 200, and 400 ppm), with a total of nine treatments with four replicates of four hens each. Parameters measured included feed intake (FI), feed:gain (FG), egg production (EP), egg weight (EW), egg mass... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbic acid; Cholecalciferol; Egg; Heat stress; Laying hens. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000100005 |
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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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| Martins,Ramilo Nogueira; Mattiuz,Ben-Hur; Santos,Leandra Oliveira; Morgado,Cristiane Maria Ascari; Mattiuz,Claudia Fabrino Machado. |
| 'Aurora-1' peaches establishes an interesting alternative as a minimally processed product, due to its characteristics like flavor, color, smell, and also because of its handling resistance. However, it has a short shelf life after a fresh-cut due to enzymatic browning and stone cavity collapse. The main purpose of this research was to test the additive with antioxidant effect to prevent browning in minimally processed 'Aurora-1' peaches. The minimal processing consists of washing, sanitizing, peelings and fruit stone extraction. After that, longitudinal cuts were made to obtain eight segments per fruit. The slices were immersed into the following treatment solutions: control (immersion in 2% ascorbic acid); 2% ascorbic acid + 2% calcium chloride; 1%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbic acid; Calcium chloride; Cysteine; Citric acid; Isoascorbate. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000400023 |
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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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| Santos,Elaine Talita; Sgavioli,Sarah; Castiblanco,Diana Maryuri Correa; Domingues,Carla Heloísa de Faria; Quadros,Thays Cristina Oliveira de; Borges,Liliana Longo; Petrolli,Tiago Goulart; Baraldi-Artoni,Silvana Martinez. |
| ABSTRACT Different levels of glycosaminoglycans (chondroitin sulfate and glucosamine sulfate) and vitamin C were injected in ovo to determine whether additive use influences the incubation parameters and bone characteristics of posthatch chicks. Hatchability was not affected by addition of glycosaminoglycans and vitamin C in ovo. However, chicks that received 4 μg additive showed 2.86% reduction in total mortality when compared with chicks from non-injected eggs. Moreover, tibia area and femur bone mineral density increased in chicks from eggs injected with 2.16 and 6.00 μg of additive, respectively. In ovo feeding with glycosaminoglycans and vitamin C can benefit bone development in embryos and reduce total mortality during the incubation period. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbic acid; Bone mineral density; Bone strength; Chondroitin; Glucosamine. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100538 |
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| Registros recuperados: 48 | |
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