Consulta: subjectFacets:"Ascorbic acid"
Registros recuperados: 48
Data/hora: 02/06/2024 08:05:10

Effects of aroma quality on the biotransformation of natural 2-phenylethanol produced using ascorbic acid
Provedor de dados: 69
Autores: 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

Modulatory effects of the antioxidant ascorbic acid on the direct genotoxicity of doxorubicin in somatic cells of Drosophila melanogaster
Provedor de dados: 74
Autores: Fragiorge,Edson José; Spanó,Mário Antônio; Antunes,Lusânia Maria Greggi.
In this study two different crosses involving the wing cell markers mwh and flr³ (standard (ST) cross and high bioactivation (HB) cross, the latter being characterized by a high constitutive level of cytochrome P450 which leads to an increased sensitivity to a number of promutagens and procarcinogens) were used to investigate the modulatory effects of ascorbic acid (AA) combined with the antitumor agent doxorubicin (DXR) in Drosophila melanogaster. We observed that the two different concentrations of AA (50 or 100 mM) had no effect on spots frequencies, while DXR treatments (0.2 or 0.4 mM) gave positive results for all types of spots, when compared to negative control. For marker-heterozygous (MH) flies, a protective effect was observed with the lower...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic acid; Doxorubicin; Drosophila melanogaster; Genotoxicity tests; Somatic mutation; Recombination test.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300025

Vitamin C content in Habanero pepper accessions (Capsicum chinense)
Provedor de dados: 75
Autores: Teodoro,Ana Flávia P; Alves,Rosa de BN; Ribeiro,Leandro B; Reis,Karina; Reifschneider,Francisco José B; Fonseca,Maria Esther de N; Silva,Joseane P da; Agostini-Costa,Tânia da S.
Fruits of Capsicum species (peppers) accumulate high amounts of ascorbic acid or vitamin C. C. chinense occurs in the Midwest and Northeast regions and the Amazon Basin (where its greatest genetic diversity is found). The objective of the present work was to quantify the vitamin C content in peppers of 22 accessions of C. chinense 'Habanero' from the Breeding Program of Embrapa Vegetable Crops. Vitamin C was extracted from mature fruits with TCEP-HCl (tris 2-carboxyethyl-phosphine hydrocloride) and its content determined by high performance liquid chromatography (HPLC). Vitamin C content ranged from 54.1 to 129.8 mg/100 g. Accessions were divided into four heterogeneous groups of diversity. Vitamin C content of the first group varied between 116.2 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pepper; Ascorbic acid; Genetic resource; High performance liquid chromatography (HPLC).
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000100009

Compostos fenólicos e vitamina C na polpa extraída dos frutos do híbrido de maracujazeiro azedo BRS Ouro Vermelho.
Provedor de dados: 14
Autores: COHEN, K. de O.; TUPINAMBA, D. D.; COSTA, A. M.; JUNQUEIRA, N. T. V.; FALEIRO, F. G.; SOUSA, H. N. e; BAIOCCHI, M. do V.
bitstream/item/76643/1/comtec-156.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maracujá; Passiflora edulis; Vitamina C; Variedade; Passion fruits; Ascorbic acid; Varieties.
Ano: 2008
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570684

Utilização do ácido ascórbico (vitamina C) pelos peixes.
Provedor de dados: 14
Autores: ROTTA, M. A.
Importância do ácido ascórbico na nutrição dos peixes; Nutrição dos peixes; Histórico e evolução; Química; Absorção e funções metabólicas; Crescimento; Reprodução; Resposta ao estresse; Resistência a doenças; Formas do ácido ascórbico e doses utilizadas; Estabilidade; Bioatividade; Doses.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Ácido ascórbico; Aquacultura; Vitamin.; Dieta; Peixe; Nutrição; Vitamina C.; Ascorbic acid; Aquaculture; Fish; Diet; Nutrition.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/799021

Nutritional components affecting skeletal development in fish larvae
Provedor de dados: 5
Autores: 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

Analysis of Myenteric Neurons of the Cecum of Diabetic Rats After Supplementation with Ascorbic Acid
Provedor de dados: 77
Autores: Zanoni,Jacqueline Nelisis; Pereira,Priscila Goncalves Cardoso; dos Santos Pereira,Marli Aparecida.
The objective of this work was to investigate the neuroprotective action of the ascorbic acid over the myenteric neurons in the cecum of Wistar rats, four months after induction of the diabetes mellitus experimental with streptozotocin. Three groups with five rats each were used: C- controls, D- diabetic, DA- diabetic treated with ascorbic acid. For evidentiation of the myenteric neurons was carried out to Giemsa's technique. Were evaluated the areas of cell bodies of 500 neurons in each group studied. The quantitative analysis was carried out in an area of 16.6 mm2 in each cecum studied. In the animals diabetic observed elevation of the glycemia and glycated hemoglobin. The supplementation with ascorbic acid was effective under the myenteric neurons of...
Tipo: Journal article
Palavras-chave: Ascorbic acid; Diabetes mellitus; Oxidative stress; Cecum; Streptozotocin.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200013

Density and Morphometry of Overall Myenteric Neurons Population from the Duodenum of Diabetic Rats (Rattus norvegicus) under Ascorbic Acid Supplementation
Provedor de dados: 77
Autores: 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&lt;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

Physicochemical attributes and functional properties of flowers of Brazilian feijoa genotypes
Provedor de dados: 86
Autores: 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

Fruit quality of Brazilian genotypes of feijoa at harvest and after storage
Provedor de dados: 86
Autores: 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

Germination conditions influence the physical characteristics, isoflavones, and vitamin C of soybean sprouts
Provedor de dados: 86
Autores: 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

Vitamin C and endogenous cortisol in foreign-body inflammatory response in pacus
Provedor de dados: 86
Autores: Belo,Marco Antonio de Andrade; Moraes,Julieta Rodini Engrácia de; Soares,Vando Edésio; Martins,Maurício Laterça; Brum,Camila Dantas; Moraes,Flávio Ruas de.
The objective of this work was to evaluate the effect of food supplementation with vitamin C on macrophage and multinucleated giant cell (MGC) activities of pacus at two stocking densities. The experiment was carried out in a 2x2x3 split-plot factorial arrangement with: 0 and 500 mg kg-1 vitamin C; 5 and 20 kg m-3 stocking densities; and evaluation times at 3, 6, and 12 days after the subcutaneous implantation of glass coverslips (DPI). The number of macrophages and MGC, as well as cortisol and glucose plasma levels were determined. The number of macrophages and MGC with two to five nuclei was significantly greater in fish supplemented with vitamin C at 5 kg m-3 stocking density at 3 DPI in comparison to nonsupplemented ones. The macrophage and MGC counts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piaractus mesopotamicus; Ascorbic acid; Glucocorticoid; Inflammation; Langhans cells; Multinucleated giant cells.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000700019

Effect of the supplementation of vitamins and organic minerals on the performance of broilers under heat stress
Provedor de dados: 89
Autores: 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

Ascorbic acid and citric flavonoids for broilers under heat stress: effects on performance and meat quality
Provedor de dados: 89
Autores: 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

Performance, Body Temperature and Egg Quality of Laying Hens Fed Vitamins D and C Under Three Environmental Temperatures
Provedor de dados: 89
Autores: 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

BIOACTIVE COMPOUNDS DURING THE MATURATION OF FOUR FRUITS NATIVE TO THE RESTINGA FOREST OF CEARA
Provedor de dados: 94
Autores: 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

Preservation of minimally processed 'aurora-1' peaches using additives
Provedor de dados: 94
Autores: 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

Citrus Sinensis cultivars: alternatives for diversification of brazilian orchards
Provedor de dados: 94
Autores: 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

Glycosaminoglycans and vitamin C in ovo feeding affects bone characteristics of chicks
Provedor de dados: 96
Autores: 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

Performance and hematology of pacu fed diets supplemented with vitamins C and/or E
Provedor de dados: 63
Autores: Garcia,Fabiana; Pilarski,Fabiana; Onaka,Eduardo Makoto; Moraes,Flávio Ruas de.
Pacu (Piaractus mesopotamicus Holmberg, 1887) is a valued Brazilian fish species for aquaculture. This is highly susceptible to disease, and feed supplementations for pacu can be a very important strategy to prevent disease incidence in fish farms. The aim of this study was to evaluate a strategic supplementation for pacu. Juvenile pacu (10.5 ± 1.2 g) were fed diets containing three levels of vitamins C and/or E (0, 250, and 500 mg vitamin kg-1 diet). Fish were fed diets without supplementation for two months prior to the experiment. After that period, experimental feeding was initiated for two months. Growth and hematological evaluations were made on the thirtieth and sixtieth days of feeding. Pacu fed diet without supplementation of vitamins C and E...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piaractus mesopotamicus; Ascorbic acid; Feed supplementation; Tocopherol.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300007

A feasible method to extract DNA from the cambium of high-canopy trees: from harvest to assessment
Provedor de dados: 36
Autores: MANGARAVITE,Érica; TERRA,Vanessa; HATTORI,Eric Koiti Okiyama; DAL’SASSO,Thaís Carolina da Silva; BHERING,Leonardo Lopes; OLIVEIRA,Luiz Orlando de.
ABSTRACT Many tropical trees have high canopies and their leaves are not accessible. Thus, the use of tissue from a more accessible organ (cambium) for DNA extraction may be an alternative for molecular studies. We adapted a feasible methodology for extracting genomic DNA from cambium tissue harvested in the field for the assessment with PCR. We tested three storage conditions (two buffers and a silica gel) and four periods of time after harvest. We used previously described protocols and tested them on three species that occur in Amazonian forests and other biomes: Anadenanthera peregrina var. peregrina, Cedrela fissilis, and Ceiba speciosa. Our protocol obtained suitable PCR-grade genomic DNA for DNA sequencing and microsatellite genotyping. We recommend...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Ascorbic acid; Dithiothreitol; DNA isolation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400335

Physiological quality and seed respiration of primed Jatropha curcas seeds
Provedor de dados: 39
Autores: Horbach,Micheli Angelica; Dranski,João Alexandre Lopes; Malavasi,Ubirajara Contro; Malavasi,Marlene de Matos.
ABSTRACT Seed deterioration is a natural and irreversible process. Nevertheless, seed priming with water and antioxidants can minimize oxidative damage in oilseeds, resulting in attenuation of seed deterioration. The objective of this assay was to evaluate seed priming on respiratory activity of Jatropha curcas submitted to accelerated aging. Seeds from two provenances (Janauba and Pedro J. Caballero) were submitted to three priming treatments (control, immersion in deionized water, and with 750 µmol L-1 of ascorbic acid) and treated for accelerated aging at 41 °C for 72 h. The results showed that the priming of J. curcas seeds promoted tolerance to accelerated aging. Primed seeds, with ascorbic acid from Janauba and deionized water from Pedro J....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Accelerated aging; Ascorbic acid; Gas chromatography; Oil seeds; Physic nut.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100063

Physiological Role of Ascobin on Quality and Productivity of Sunflower Plants Irrigated with Sodium Chloride Solution
Provedor de dados: 111
Autores: Dawood, Mona Gergis.
Ascobin had a promotion effect on growth and active constituents’ compounds of various plants under normal and stressed conditions. The physiological response of sunflower plant to foliar application of ascobin treatments (200,400,600 ppm) was investigated either under normal or salinity stressed conditions (5000 ppm NaCl solution) in pot experiments at the wire-house of the National Research Centre, Dokki, Cairo, Egypt. Data revealed that salinity stress caused significant decreases in shoot height, leaf area chlrorophyll b, carotenoids, total photosynthetic pigments, seed yield, yield components, oil and protein content of the yielded seeds relative to control. The decrease in oil percentage was more obvious by salinity than protein percentage. Since...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus L.; Ascorbic acid; Citric acid; Seed quality; Antioxidant enzymes.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4375

Optimization of ultrasound-assisted extraction of ascorbic acid from fennel (Foeniculum vulgare) seeds and evaluation its extracts in free radical scavenging
Provedor de dados: 111
Autores: Aboonajmi, Mohammad; Ghorbani, Marzieh; Ghorbani Javid, Majid; Arabhosseini, Akbar.
The main objective of this study was to compare ultrasound assisted extraction with soxhlet extraction method as control in the extraction ascorbic acid of fennel seeds. Treatment conditions were performed using soxhlet method (240 min at 85 °C) and ultrasound treatment (20 kHz, 39, 64 and 96 W/cm2, 40 and 60 °C), for 15, 30 and 45 min. No significant differences were observed for total soluble solids among the samples studied. A similar trend was observed for both the amount of ascorbic acid extract and its ability to DPPH free radical scavenging. The greatest amount of ascorbic acid obtained in 15 minutes sonication (96 W/cm2 at 60 °C), with equivalent of 1.73 mg/ml fennel seeds extraction. There was a significant difference between soxhlet and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ultrasound-assisted extraction; Ascorbic acid; Soxhlet.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4328

Effect of processing on the physicochemical and sensory properties of mammee apple (Mammea americana L.) fruit
Provedor de dados: 115
Autores: Ordóñez-Santos,Luís E.; Martínez-Álvarez,Gloria M.; Vázquez-Riascos,Andrea M.
Mammee apple (Mammea americana L.) fruits are promising sources of various bioactive compounds such as carotenoids, vitamin C, and phenolic compounds, and offer great potential for use in agro-industrial processing and to meet the requirements desired for consumer health. The objective of this study was to evaluate physicochemical and sensory changes of mammee apple after syrup and jam processing. Fruits were washed, cut, pulped, blanched, and the pieces of fruit blanching were stored in 125 mL glass jars, and covered with 18 °Brix boiling sugar syrup. The mixture was pasteurized and cooled. Jam contained 50 % fruit, 50 % sugar, and 3 % pectin; sugar was added and the mixture boiled to a final concentration of 60 to 62 °Brix. The experimental design was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exotic fruit; Carotenoids; Ascorbic acid; PH; Dry matter.
Ano: 2014
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000400003

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

Morphological deformities in the osseous structure in spotted sorubim Pseudoplatystoma coruscans (agassiz &amp;amp; spix, 1829) with vitamin c deficiency
Provedor de dados: 42
Autores: FUJIMOTO,RODRIGO Y.; SANTOS,RUDÃ F.B.; CARNEIRO,DALTON J.
Vitamin C is essential for fish diets because many species cannot syntethize it. This vitamin is needed for bone and cartilage formation. Moreover, it acts as antioxidant and improve the immunological system. The present work investigated the effects of vitamin C diet supplementation to spotted sorubim (Pseudoplatystoma coruscans) fingerlings by frequency of bone and cartilage deformation. Ascorbyl poliphosphate (AP) was used as source of vitamin C in the diets for spotted sorubim fingerlings during three months. Six diets were formulated: one diet control (0 mg/kg of vitamin C) and 500, 1,000, 1,500, 2,000 and 2,500 mg AP/kg diets. Fishes fed without vitamin C supplementation presented bone deformation in head and jaws, and fin fragilities. Thus, 500 mg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scurvy; Bone formation; Siluriformes; Ascorbic acid.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100379

Evaluation of Chemical Constituents and Antioxidant Activity of Coconut Water (Cocus nucifera L.) and Caffeic Acid in Cell Culture
Provedor de dados: 42
Autores: SANTOS,JOãO L.A.; BISPO,VANDERSON S.; B.C. FILHO,ADRIANO; PINTO,ISABELLA F.D.; DANTAS,LUCAS S.; VASCONCELOS,DAIANE F.; ABREU,FABíULA F.; MELO,DANILO A.; MATOS,ISAAC A.; FREITAS,FLORêNCIO P.; GOMES,OSMAR F.; MEDEIROS,MARISA H.G.; MATOS,HUMBERTO R.
Coconut water contains several uncharacterized substances and is widely used in the human consumption. In this paper we detected and quantified ascorbic acid and caffeic acid and total phenolics in several varieties of coconut using HPLS-MS-MS (25.8 ± 0.6 µg-mL and 1.078 ± 0.013 µg-mL and 99.7 µg-mL, respectively, in the green dwarf coconut water, or 10 mg and 539 µg and 39.8 mg for units of coconut consumed, 500 ± 50 mL). The antioxidant potential of four coconut varieties (green dwarf, yellow dwarf, red dwarf and yellow Malaysian) was compared with two industrialized coconut waters and the lyophilized water of the green dwarf variety. All varieties were effective in scavenging the DPPH radical (IC50=73 µL) and oxide nitric (0.1 mL with an IP of 29.9%) as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Ascorbic acid; Caffeic acid; Cocos nucifera; Polyphenols.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401235

The preventive effects of ascorbic acid supplementation on locomotor and acetylcholinesterase activity in an animal model of schizophrenia induced by ketamine
Provedor de dados: 42
Autores: DAMAZIO,LOUYSE S.; SILVEIRA,FLÁVIA R.; CANEVER,LARA; CASTRO,ADALBERTO A. DE; ESTRELA,JADNE M.; BUDNI,JOSIANE; ZUGNO,ALEXANDRA I.
ABSTRACT Studies have shown that schizophrenic patients seem to have nutritional deficiencies. Ascorbic acid (AA) has an important antioxidant effect and neuromodulatory properties. The aim of this study was to evaluate the effects of AA on locomotor activity and the acetylcholinesterase activity (AChE) in an animal model of schizophrenia (SZ). Rats were supplemented with AA (0.1, 1, or 10 mg/kg), or water for 14 days (gavage). Between the 9th and 15th days, the animals received Ketamine (Ket) (25 mg/kg) or saline (i.p). After the last administration (30 min) rats were subjected to the behavioral test. Brain structures were dissected for biochemical analysis. There was a significant increase in the locomotor activity in Ket treated. AA prevented the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Schizophrenia; Ascorbic acid; Ketamine; Hyperlocomotion; Acetylcholinesterase.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301133

Histological evaluation of the periodontal ligament from aged wistar rats supplemented with ascorbic acid
Provedor de dados: 42
Autores: Zanoni,Jacqueline N.; Lucas,Nathalia M.; Trevizan,Aline R.; Souza,Ivan D.S.
Ascorbic acid (AA) is able to neutralize reactive oxygen species and is essential for collagen synthesis. In aging process oxidative stress is elevated. This study aims to investigate the effects of AA supplementation on the periodontal ligament (PL) of rats during aging. Twenty five rats were used and divided into groups: J90 (90-day-old control), E345 (345-day-old control), E428 (428-day-old control), EA345 (345-day-old supplemented with AA from 90-day-old on) and EA428 (428-day-old supplemented with AA from 90-day-old on). We analyzed the thickness, density of fibroblasts and blood vessels and collagen fibers types in the PL. In group J90 there was predominantly type III collagen fibers (87.64%). In animals supplemented with AA, the area filled by type...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aging; Ascorbic acid; Collagen; Periodontal ligament.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100327

Cell proliferation of the ileum intestinal mucosa of diabetic rats treated with ascorbic acid
Provedor de dados: 47
Autores: Nelisis Zanoni,Jacqueline; Fernandes Pereira,Renata Virginia.
The objective of this work was to evaluate the effect of the ascorbic acid supplementation on the cellular proliferation on the ileum mucosa of diabetic rats. Fifteen 90-days rats were divided in the groups: control, diabetic and diabetic supplemented with ascorbic acid (DA). Two hours prior the sacrifice, they were injected with Vincristin. Semi-seriate histological cuts stained with HE were accomplished. About 2500 crypt cells from the intestinal mucosa were counted in order to obtain the metaphasic indexes. The height and depth of 30 villi and 30 crypts were measured for each animal, respectively. The metaphasic indexes showed no significant changes when we compared the three groups: 20.2 ± 0.7 (control), 18 ± 1.9 (diabetic) and 17 ± 1.4 (DA) (p &gt;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic acid; Diabetes mellitus; Lleum; Cellular proliferation.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452008000200001

Effects of the ascorbic acid supplementation on NADH-diaphorase myenteric neurons in the duodenum of diabetic rats
Provedor de dados: 47
Autores: Pereira,Marli Aparecida Dos Santos; Bagatin,Maria Claúdia; Zanoni,Jacqueline Nelisis.
We assessed the ascorbic acid (AA) supplementation on the myenteric neurons in the duodenum of rats. Fifteen rats with 90 days of age were divided into three groups: control (C), diabetics (D) and ascorbic acid treated diabetics (DA). After 120 days of daily treatment with AA, the duodenum was submitted to the NADH-diaphorase (NADH-d) histochemical technique, which allowed us to evaluate the neuronal density in an area of 8.96 mm² for each duodenum, and also to measure the cellular profile area of 500 neurons per group. The supplementation promoted an increase on AA levels. The neuronal density (p &lt;0.05) was higher in the group DA when compared to group D. There were no significant differences in the neuronal areas, when we compared groups C (204 ±...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diabetes mellitus; Ascorbic acid; Myenteric neurons.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000200005

Vitamin C and oxidative stress in the seminiferous epithelium
Provedor de dados: 48
Autores: Angulo,Constanza; Maldonado,Rodrigo; Pulgar,Eduardo; Mancilla,Héctor; Córdova,Alex; Villarroel,Franz; Castro,Maite A; Concha,Ilona I.
In this article, we focus on the fundamental role of vitamin C transporters for the normal delivery of vitamin C to germ cells in the adluminal compartment of seminiferous tubules. We argue that the redox status within spermatozoa or in semen is partly responsible for the etiology of infertility. In this context, antioxidant defence plays a critical role in male fertility. Vitamin C, a micronutrient required for a wide variety of metabolic functions, has long been associated with male reproduction. Two systems for vitamin C transport have been described in mammals. Facilitative hexose transporters (GLUTs), with 14 known isoforms to date, GLUT1-GLUT14, transport the oxidized form of vitamin C (dehydroascorbic acid) into the cells. Sodium ascorbic acid...
Tipo: Journal article
Palavras-chave: Ascorbic acid; Oxidative stress; GLUT; Sertoli cells; SVCT; Vitamin C transporters.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000200009

Preharvest nitrogen application affects quality and antioxidant status of two tomato cultivars
Provedor de dados: 53
Autores: Frías-Moreno,Maria Noemi; Espino-Díaz,Miguel; Dávila-Aviña,Jorge; Gonzalez-Aguilar,Gustavo Adolfo; Ayala-Zavala,Jesús Fernando; Molina-Corral,Francisco Javier; Parra-Quezada,Rafael Angel; Orozco,Guadalupe Isela Olivas.
ABSTRACT Intensive horticultural crop production usually involves challenges from excessive application of fertilizer, mainly nitrogen (N). The effect of N fertilizer on the fruit quality and antioxidant status of two cherry tomato cultivars (Caballero and Victoria) under greenhouse conditions was performed. Nitrogen treatments were applied ranging from conditions comprising deficiency to toxicity (0, 15, 30, 45 and 60 mmol∙L-1). Yield, weight, diameter, fruit quality, phenols, flavonoids, lycopene, ascorbic acid and antioxidant capacity were measured at physiological maturity of the fresh tomato fruits. N treatment with 30 mmol∙L-1 produced the highest yield, fruit weight, firmness and diameter in both cultivars. However, increasing N from 30 to 60...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum; Greenhouse; Ascorbic acid; Phenolics; Lycopene.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100134

Combination vitamin C and vitamin E prevents enteric diabetic neuropathy in the small intestine in rats
Provedor de dados: 52
Autores: Zanoni,Jacqueline Nelisis; Hermes-Uliana,Catchia.
The present study evaluated the effects of supplementation with a combination of vitamin C and vitamin E on NADH-diaphorase-positive (NADH-d+) and neuronal nitric oxide synthase (nNOS)-immunoreactive myenteric neurons in the duodenum and ileum in diabetic rats. Forty rats were distributed into the following groups: normoglycemic (N), normoglycemic supplemented with vitamin C and vitamin E (NS), diabetic (D), and diabetic supplemented with vitamin C and vitamin E (DS). Vitamin C was added to the drinking water, and vitamin E was incorporated in the diet (1%). After 120 days, the animals were euthanized, and the duodenum and ileum were subjected to NADH-d and nNOS staining. Quantitative and morphometric analyses of myenteric neurons were performed. Diabetes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic acid; Α-tocopherol; Diabetes mellitus; Myenteric plexus; Enteric nervous system.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000400504

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

Synergic interaction between ascorbic acid and antibiotics against Pseudomonas aeruginosa
Provedor de dados: 52
Autores: Cursino,Luciana; Chartone-Souza,Edmar; Nascimento,Andréa Maria Amaral.
Studies were carried out on in vitro combination of ascorbic acid (AA) with six antibiotics against 12 multi-resistant Pseudomonas aeruginosa isolates. Synergic activity was detected with AA chloramphenicol, kanamycin, streptomycin and tetracycline. Indifference was observed to any antibiotics and antagonism only for chloramphenicol. Results indicated that multiresistant P. aeruginosa was affected by combination of AA and antibiotics. Future research on ascorbic acid-antimicrobial interactions may find new methods to control strains of multiresistant P. aeruginosa.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic acid; Antibiotic; Synergy; Pseudomonas aeruginosa.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000300007

Oral Administration of Citrus Extracts in Suckling Piglets
Provedor de dados: 52
Autores: Pereira,Lidiane Pescke; Hilgemberg,João Otávio; Primieri,Charlise; Mass,Anna Paula Holzmann; Lehnen,Cheila Roberta.
Abstract An experiment was conducted to evaluate the performance of suckling piglets subjected to oral administration of citrus extracts (CE). Twenty sows were used with ten sucking piglets on average initial weight of 1.26 kg (± 0.32) for 21 days. The experimental design was a randomized complete block design with two treatments: Negative Control (without antimicrobials) and Citrus Extracts (ascorbic acid + flavonoids, oral administration of 0.3 mg kg of BW via pigdoser) with ten repetitions each. The number of live-born piglets in females PO5 was 21% higher than in PO3 sows. Sows where piglets received CE showed a 10% higher (P &lt;0.05) feed intake in the last week of lactation. From 8 to 21 days, the feed conversion of NC sows was 23 and 38% lower (P...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic acid; Additives; Antibiotics flavonoids; Gut health.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100514

Influence of osmotic dehydration on ascorbic acid loss in pickled dry peppers (Capsicum chinense)
Provedor de dados: 52
Autores: Silva,Tissiane Mayara da; Argandoña,Eliana Janet Sanjinez; Madrona,Grasiele Scaramal; Moraes,Izabel Cristina Freitas; Haminiuk,Charles Windson Isidoro; Branco,Ivanise Guilherme.
The objective of this work was (1) to develop a dehydrated pepper with 45% humidity, determining the drying curves for pepper, with and without osmotic pre-treatment and (2) to evaluate the influence of both drying and osmotic treatment on the content ascorbic acid (vitamin C) in fresh pepper and pepper with 45% humidity. The experiments were carried out using the peppers cut in half, with and without osmotic pre-treatment, followed by drying in an oven at 70 ºC. The results showed that the osmotic pretreatment did not influence the retention of ascorbic acid during the drying of pepper. The sensory analysis regarding the color, flavor, and texture attributes revealed that there was no difference in the acceptability.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum chinense; Ascorbic acid; Osmotic dehydration; Drying.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000500016

Effect of picloram, additives and plant growth regulators on somatic embryogenesis of Phyla nodiflora (L.) Greene
Provedor de dados: 52
Autores: Ahmed,Abdul Bakrudeen Ali; Rao,Adhikarla Suryanarayana; Rao,Mandali Venkateswara; Taha,Rosna Mat.
The present study describes the plant regeneration via somatic embryogenesis in suspension culture derived from the leaf and stem explants of Phyla nodiflora. The medium type, plant growth regulators, complex extract (coconut milk and malt extract) and anti-oxidant (activated charcoal, ascorbic acid, Polyvinylpyrrolidone and citric acid) markedly influenced the embryo regeneration of P. nodiflora. MS with 2,4-D and activated charcoal (10 mg/L) gave the highest stimulation of embryogenic callus growth. Optimized callus was transfered into suspension culture, which showed the globular, heart shaped embryos in MS with 2,4-D + BA + picloram (0.1 mg/L), coconut milk (10 ml/L), citric acid (100 mg/L) on 6th subcultures. Further development stages such as torpedo...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Somatic embryogenesis (SEs); Picloram; Ascorbic acid; Coconut milk; Plant growth regulators; Murashige and Skoog medium.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100002

Effect of the ascorbic acid treatment on the NADHd-positive myenteric neurons of diabetic rats proximal colon
Provedor de dados: 52
Autores: Zanoni,Jacqueline Nelisis; Pereira,Renata Virginia Fernandes; Freitas,Priscila de.
The aim of this work was to study the effect of the ascorbic acid on the myenteric neurons of diabetic rats proximal colon. Fifteen rats (90 days old) were divided into three groups: control, untreated diabetic and treated diabetic with ascorbic acid (DA). After 120 days of daily treatment with ascorbic acid, the intestinal segments were submitted to the NADH-diaphorase (NADHd) histochemistry technique to expose the myenteric neurons. The group DA showed a higher neuronal density (33.4 %) when compared to the untreated diabetic animals (p &lt; 0.05). Cellular body area of neurons was significantly larger in group DA (17.3 %) when compared to the untreated diabetics (p &lt; 0.05). It could be concluded that the ascorbic acid promoted a neuroprotective...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic acid; Colon; Diabetes; Myenteric neurons.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100004

Local treatment with ascorbic acid accelerates recovery of post-sutured Achilles tendon in male Wistar rats
Provedor de dados: 56
Autores: Souza,M.; Moraes,S.A.S.; de Paula,D.R.; Maciel,A.A.; Batista,E.J.O.; Silva,D.G.F.; Bahia,C.P.; Oliveira,K.R.H.M.; Herculano,A.M.
Tendon rupture is a very frequent accident involving average people and high-performance athletes. Clinical studies describe tendon recovery as a painful and slow process involving different biochemical and histological events. Ascorbic acid (AA) is a potent antioxidant as well as an important cofactor for collagen synthesis. In the current study, we evaluated if local treatment with AA is able to promote tendon repair in tenotomized rats. Animals were submitted to Achilles tendon rupture followed by surgical suture. Control and AA groups received in loco injection of saline solution (0.9% NaCl) and 30 mM AA, respectively. Histological and functional recovery of Achilles tendon tissue was evaluated at 7, 14, and 21 days post-surgery. Hematoxylin/eosin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tendon recovery; Tenotomy; Ascorbic acid; Tendon suture.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000900608

Effects of N-acetylcysteine on spinal cord oxidative stress biomarkers in rats with neuropathic pain
Provedor de dados: 56
Autores: Horst,A.; de Souza,J.A.; Santos,M.C.Q.; Riffel,A.P.K.; Kolberg,C.; Partata,W.A.
N-acetylcysteine (NAC) inhibits nociceptive transmission. This effect has been associated partly with its antioxidant properties. However, the effect of NAC on the levels of lipid hydroperoxides (a pro-oxidant marker), content of ascorbic acid (a key antioxidant molecule of nervous tissue) and total antioxidant capacity (TAC) is unknown. Thus, our study assessed these parameters in the lumbosacral spinal cord of rats with chronic constriction injury (CCI) of the sciatic nerve, one of the most commonly employed animal models of neuropathic pain. Thirty-six male Wistar rats weighing 200–300 g were equally divided into the following groups: Naive (rats did not undergo surgical manipulation); Sham (rats in which all surgical procedures involved in CCI were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lipid hydroperoxides; Total antioxidant capacity; Ascorbic acid; Chronic constriction injury; Antinociception.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017001200607

Evaluation of the addition of ascorbic acid to the ration of cultivated Piaractus mesopotamicus (Characidae) on the infrapopulation of Anacanthorus penilabiatus (Monogenea)
Provedor de dados: 56
Autores: Martins,M.L.
Sixty Piaractus mesopotamicus Holmberg, 1887 (pacu) fry fed a diet containing 0, 50, 100 and 200 mg ascorbic acid/kg dry feed were studied to evaluate the effect on parasitic infestation by the monogenean Anacanthorus penilabiatus Boeger, Husak and Martins, 1995 (Monogenea: Dactylogyridae) for a period of 24 weeks. The temperature of the aquaria was measured daily and remained between 28 and 31oC. At the beginning of the experiment, fish showed 6.15 ± 0.33 cm standard length and 8.64 ± 1.62 g average body weight. A sample of fish was examined and showed 43 ± 17 monogeneans per fish. At the end of the experiment, the gills of control and vitamin C-treated fish were collected for parasite counts. Control fish had 42.5 parasites per fish, a significantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic acid; Monogenean; Anacanthorus penilabiatus; Infestation; Fish; Piaractus mesopotamicus.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000500008

Cadmium toxicity causes oxidative stress and induces response of the antioxidant system in cucumber seedlings
Provedor de dados: 61
Autores: 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

Evaluation of the use of wound-protectant fungicides and biological control agents against stem canker (Neofusicoccum parvum) of blueberry
Provedor de dados: 118
Autores: Latorre,Bernardo A; Torres,René; Silva,Tatiane; Elfar,Karina.
B.A. Latorre, R. Torres, T. Silva, and K. Elfar. 2013. Evaluation of the use of wound-protectant fungicides and biological control agents against stem canker (Neofusicoccum parvum) of blueberry. Cien. Inv. Agr. 40(3): 537-545. Economically, blueberry (Vaccinium corymbosum) has become a very important fruit crop in Chile, and stem canker (Neofusicoccum parvum) has frequently been observed as a major disease. The symptoms are characterized by partial or total death of the foliage associated with extensive reddish-brown canker lesions at the base of the stems. Pruning wounds appear to be the main infection route. In this study, fungicide pastes and biological control agents were evaluated for their effectiveness as pruning wound-protectants against N. parvum....
Tipo: Journal article
Palavras-chave: Botryosphaeria canker; Biological control; Boric acid; Ascorbic acid; Vaccinium corymbosum.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300007

Quality, bioactive compounds, and antioxidant activity of serrano chili peppers cultivated in volcanic rock-vermicompost and nutrient solutions
Provedor de dados: 118
Autores: Cruz-Crespo,Elia; Sumaya-Martínez,María T; Can-Chulim,Álvaro; Pineda-Pineda,Joel; Bugarín-Montoya,Rubén; Aguilar-Benítez,Gisela.
E. Cruz-Crespo, M.T. Sumaya-Martínez, Á. Can-Chulim, J. Pineda-Pineda, R. Bugarín-Montoya and G. Aguilar-Benítez. 2015. Quality, bioactive compounds, and antioxidant activity of serrano chili peppers cultivated in volcanic rock-vermicompost and nutrient solutions. Cien. Inv. Agr. 42(3): 375-384. The concentration of antioxidant compounds, the antioxidant activity, physical quality characteristics, and the yield of serrano chilies (Capsicum annuum L.) are affected by agricultural practices, such as the use of vermicompost in containers combined with chemical fertilizers, the investigations of which have focused on yield. A study was performed to determine whether vermicompost mixed with volcanic rock and the ionic composition of the nutrient solution affect...
Tipo: Journal article
Palavras-chave: Ascorbic acid; Capsicum annuum; Phenols; Yields.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000300006

Associação de ractopamina e vitaminas antioxidantes para suínos em terminação
Provedor de dados: 65
Autores: 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