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Registros recuperados: 8
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Control of the lipid oxidation in Nile tilapia feed Ciência Rural
Grassi,Thiago Luís Magnani; Marcos,Marcelo Tacconi de Siqueira; Ponsano,Elisa Helena Giglio.
ABSTRACT: The purpose of this research was to investigate the progress of the rancidity in Nile tilapia diets containing bacterial biomass of Rubrivivax gelatinosus . Six experimental treatments comprised basal diet (negative control), diet with asthaxanthin (positive control) and 4 diets with different concentrations of the bacterial biomass. The thiobarbituric acid assay for rancidity analyses were accomplished after 6 and 12 months of diets storage. It was concluded that Rubrivivax gelatinosus biomass minimized the racidity in Nile tilapia diets in 32.52 to 44.72% at 6 months and in 37.85 to 52.37% at 12 months of storage.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Antioxidant; Rancidity; Rubrivivax gelatinosus; TBARS.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000901675
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Effect of gamma radiation on lipids by the TBARS and NMR BABT
Silva,Adriana Cristina de Oliveira; Mársico,Eliane Teixeira; Jesus,Edgar Francisco Oliveira de; Guimarães,Carlos Frederico; Cortez,Marco Antonio Sloboda.
The aim of this work was to study the effect of gamma radiation on lipids by TBARS and NMR. The samples of raw whole milk were subjected to gamma radiation from Co60 in doses of 1, 2 and 3 kGy and the production of rancidity was studied through Nuclear Magnetic Resonance (NMR) and Thiobarbituric Acid Test (2-TBARS). The TBARS values increased according to the intensity of the radiation dose applied at the samples, demonstrating correlation between the radiation dose and the production of lipid oxidation. This was confirmed by NMR with the formation of peaks of aldehydes and ketones that were small and similar in the doses of 1 and 2 kGy. In the dose of 3 kGy, the total degradation of milk fat was observed. A correlation between the NMR and 2-TBA was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Milk; Gamma radiation; Rancidity; Thiobarbituric Acid Test; Nuclear Magnetic Resonance (NMR).
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000600021
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Effect of salt on color and warmed over flavor in charqui meat processing BABT
Youssef,Elza Y.; Garcia,Carlos E. Rocha; Shimokomaki,Massami.
A combination of salt (NaCl) high concentration and curing salt was investigated for their role in warmed-over flavor (WOF) and color changes during charqui meats processing. WOF was measured by TBARS method in uncured charqui meat (CH) and in cured charqui known in Brazil as Jerked beef (JB). WOF occurred substantially in CH and sodium nitrite was able to inhibit 40-45% (p<0.05) in JB samples stored for 30 days. Color parameters also changed as evaluated by CIELAB system. The a*/b* ratio showed that CH samples presented brown color indicating the formation of metmyoglobin (Fe3+) whilst JB samples presented deep red color an indication of nitrosylmyoglobin (Fe2+) formation. Under cooking, a*/b* ratio indicated the presence of denatured metmyoglobin...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Intermediate moisture meat product; Jerky meat; Charqui meat; Cured meat; Rancidity; Warmed over flavor inhibition.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400014
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Physical and chemical characteristics of cashew nut flour stored and packaged with different packages Ciênc. Tecnol. Aliment.
GADANI,Bruna Carolina; MILÉSKI,Kelly Márcia Lazarotto; PEIXOTO,Lucas Silva; AGOSTINI,Juliana da Silva.
Abstract The aim of this study was to evaluate the physical and chemical changes in cashew nut flour under different packaging and storage conditions. The flour samples were characterized according to their chemical composition, packaged in polystyrene trays associated with covering chloride polyvinyl (PVC), plastic pot of polyethylene terephthalate (PET), plastic packaging polyethylene (POL) and without coating polystyrene trays (CON). All packages were stored for 225 days, evaluating every 45 days the moisture content of the flour as well as extracting their oil by the cold method for characterization on the following indexes: acidity, saponification, iodine, peroxide and refraction. There was slight and gradual increase in the moisture content from the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Deterioration; Rancidity; Anacardium occidentale L.; Oilseed; Oil.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000400657
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Production and use of microbial biomass helping sustainability in fish production chain. Repositório Alice
PONSANO, E. H. G.; GRASSI, T. L. M.; SANTO, E. F. E.; LIMA, L. K. F.; PEREIRA, R. C..
This study represents an example of the classical concept of biotechnology as ?the use of living organisms to make useful products and provide services?. Its purpose was to investigate the ability of phototrophic bacterium Rubrivivax gelatinosus to cause the depollution of an industrial byproduct and work as an ingredient for animal feed as a way of making the productive process more sustainable. First, the bacterium was grown in fish industry effluent (inoculum at 1% v/v, 30 +- 5 oC, 2000 +- 500 lux, 7 days) and recovered as a biomass (microfiltration + centrifugation + lyophilization), resulting in a decrease of ca. 80% in the Chemical Oxygen Demand of the pollutant efluente and so placing it within the required limits for wastewaters discard in Brazil....
Tipo: Parte de livro Palavras-chave: Peixe; Tilápia; Proteína Microbiana; Biotecnologia; Fish production; Microbial biomass; Rubrivivax gelatinosus; Color; Rancidity; Chemical oxygen demand; Tilapia (common name).
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1104300
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Sensory profile of warmed-over flavour in tenderloin from steers supplemented with alpha-tocopherol R. Bras. Zootec.
Lage,Moacir Evandro; Godoy,Helena Teixeira; Bolini,Helena Maria André; Oliveira,Raphael Rocha de; Rezende,Cíntia Silva Minafra e; Prado,Cristiano Sales.
The objective of the present study was to evaluate the occurrence of warmed-over flavour (WOF) in cooked tenderloin and the influence of alpha-tocopherol on its inhibition. A total of 24 animals were confined, 12 of which received 1200 mg/head/day of alpha-tocopherol acetate for 90 days. Longissimus dorsi muscle cuts (tenderloin) were obtained for sensory profile assessment by nine trained tasters. The tasters evaluated the taste of the meat based on four general and 18 specific attributes. The results of the evaluations were analysed with ANOVA, post-hoc tests of the means (Tukey tests), and principal component analysis (PCA). There was no significant difference in the WOF between the cuts of meat from the supplemented and non-supplemented animals....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant; Cooking; Lipid oxidation; Rancidity; Storage; Vitamin E.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800016
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Stability and microbiological quality of rice bran subjected to different heat treatments. Repositório Alice
OLIVEIRA, M. G. de C.; BASSINELLO, P. Z.; LOBO, V. L. da S.; RINALDI, M. M..
Tipo: Separatas Palavras-chave: Farelo de arroz; Rancidez; Contaminação alimentar; Atividade lipásica; Lipase activity.; Tratamento Térmico.; Food contamination; Heat treatment; Rancidity; Rice bran..
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/959062
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Stability and microbiological quality of rice bran subjected to different heat treatments Ciênc. Tecnol. Aliment.
Oliveira,Márcia Gonzaga de Castro; Bassinello,Priscila Zaczuk; Lobo,Valácia Lemes da Silva; Rinaldi,Maria Madalena.
Rice bran is a byproduct commonly used for animal feeding; however its nutritional value and potential application in human diet have attracted market interest. Its preservation for safe use is still a challenge, so the objective of this study was to determine the quality of commercially available rice bran samples subjected to different heat treatments (extruding, parboiling, toasting, and microwave oven heating) in order to promote stabilization during storage under room temperature. Rice bran samples were collected from two industries, and each treatment was divided in three parts, each corresponding to three repetitions. All samples were evaluated for moisture content, total microorganisms, mold and yeast counting, hydrolytic rancidity, and lipase...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rancidity; Microbial contamination; Lipase activity.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000400014
Registros recuperados: 8
Primeira ... 1 ... Última
 

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