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| Registros recuperados: 3.119 | |
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| KNYSAK,Daniel. |
| Abstract Aroma is the most important factor in assessing the quality of coffee. The volatile compounds profile could be very important to confirm the authenticity of Coffea arabica. The study was carried out on two species of unroasted coffee beans: Coffea arabica from Colombia and Nepal and Coffea robusta from Uganda and Vietnam. Both Coffea arabica and Coffea canephora were imported to the country of analysis approximately 5 months prior to the research. Before the analysis, the coffee beans were kept in a sealed, dark container, at 21 °C. The tests were performed using an electronic nose. Its functioning is based on gas chromatography with two columns of different polarities in parallel and with 2 ultra sensitive Flame Ionization Detectors (FID). With... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Volatile compounds profiles; Coffee; Coffea Arabica; Coffea canephora. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000300444 |
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| Miranda,Adriana Leão de; Ribeiro,Mariana Carvalho; Moreira,Ricardo Felipe Alves; Maria,Carlos Alberto Bastos de. |
| Changes in the profile of volatile compounds after the heating of refined soybean oil without adding antioxidants, and treated with quercetin and chlorogenic acid (5-CQA) were investigated by GC/FID, GC/MS, and GC/SNIFFING. The heating temperature of the oil sample was 20 °C for the first minute, and then it was increased up to 160 °C at the rate of 10 °C min-1. The final temperature was kept for 10 minutes. 19 volatiles were identified in the heated samples without antioxidants. Medium-chain carbonyls predominated in the volatile fraction, mainly 2-heptenal, 2,4-heptadienal and 2,4-decadienal. Around 11 to 15 volatile compounds were detected in the heated samples treated with 5-CQA and quercetin, respectively. 5-CQA was not very efficient in delaying the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soybean oil; GC/MS; Oxidative volatiles; Quercetin; Chlorogenic acid. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612008000400029 |
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| OLIVEIRA,Dayse Lícia de; GRASSI,Thiago Luís Magnani; SANTO,Edson Francisco do Espirito; CAVAZZANA,Jefferson Felipe; MARCOS,Marcelo Tacconi de Siqueira; PONSANO,Elisa Helena Giglio. |
| Abstract This research aimed at studying the effects of different washing conditions (distilled water x distilled water + NaHCO3 + NaCl) and cryoprotectants (NaCl + saccharose x sorbitol + sodium tripolyphosphate) for the production of tilapia surimi. The experiment used a factorial design 2 x 2 and the variables analyzed were proximate composition, non-nitrogen protein (NNP) removal, texture, color and yield. The protein and moisture contents of the surimi were influenced neither by washings nor by cryoprotectants, while the ash content was higher when NaCl + saccharose were used as the cryoprotectants and the yield was higher when only distilled water was used for the washings. Combining distilled water for the washings and NaCl + saccharose as the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Proteins; Texture; Color. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000300432 |
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| LORENZETTI,Elidiane; PUTON,Bruna Maria Saorin; STEFFENS,Juliana; JUNGES,Alexander; PAROUL,Natalia; BACKES,Geciane Toniazzo; VALDUGA,Eunice; CANSIAN,Rogério Luis. |
| Abstract Cooling of carcasses using water immersion is the most used process in the poultry industry. In this stage, besides the reduction of temperature, water absorption in the carcasses occurs and, consequently, in the chicken cuts, which are monitored by the companies and supervised by the Ministry of Agriculture, Livestock, and Supply of Brazil, which establishes water absorption limits. The objective of this work was to evaluate the process capacity analysis tool to analyze the water absorption capacity by chicken carcasses during precooling, based on the absorption indexes obtained on an industrial scale, by the analysis of 720 carcasses. After structural alterations, aiming at greater bubble control and shorter residence time of the chicken... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Process potential index; Process performance index; Chicken carcasses; Water absorption; Chiller. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000400850 |
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| OTHMAN,Siti Hajar; EDWAL,Siti Amirah Mohammad; RISYON,Nazratul Putri; BASHA,Roseliza Kadir; A. TALIB,Rosnita. |
| Abstract The water sorption and permeability properties of edible film produced from potato peel waste was investigated under different levels of relative humidity (23, 33, 43, 57, 75% RH) and temperatures (5, 30, 50 °C). The water sorption behaviour and isotherms of the film were investigated by fitting water sorption data to the Peleg model and the Guggenheim, Anderson de Boer model (GAB model). The amount of moisture content, time required for the moisture content of the film to reach equilibrium, water sorption rate, and water sorption capacity increased when the relative humidity increased. The effect of temperature on moisture content, water sorption rate, water sorption capacity, and monolayer moisture content is complex and related to the water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Edible film; Food packaging; Water permeability; Water sorption. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000500063 |
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| Teixeira,Lílian Gonçalves; Lages,Priscilla Ceci; Jascolka,Tatianna Lemos; Aguilar,Edenil Costa; Soares,Fabíola Lacerda Pires; Pereira,Solange Silveira; Beltrão,Nathalia Ribeiro Mota; Matoso,Rafael de Oliveira; Nascimento,André Márcio do; Castilho,Rachel Oliveira de; Leite,Jacqueline Isaura Alvarez. |
| White tea is an unfermented tea made from young shoots of Camellia sinensis protected from sunlight to avoid polyphenol degradation. Although its levels of catechins are higher than those of green tea (derived from the same plant), there are no studies addressing the relationship between this tea and obesity associated with oxidative stress.The objective of this study was to evaluate the effect of white tea on obesity and its complications using a diet induced obesity model. Forty male C57BL/6 mice were fed a high-fat diet to induce obesity (Obese group) or the same diet supplemented with 0.5% white tea extract (Obese + WTE) for 8 weeks. Adipose tissue, serum lipid profile, and oxidative stress were studied. White tea supplementation was not able to reduce... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: High-fat diet; Obesity; Oxidative stress; White tea; Camellia sinensis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000400015 |
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| FIOREZE,Romeu; MORINI,Bruno. |
| The yam (Discorea sp) is a tuber rich in carbohydrates, vitamins and mineral salts, besides several components that serve as raw material for medicines. It grows well in tropical and subtropical climates and develops well in zones with an annual pluvial precipitation of around 1300mm, and with cultural treatments, its productivity can exceed 30t/ha. When harvested, the tubers possess about 70% of moisture, and are merchandised "in natura", in the atmospheric temperature, which can cause its fast deterioration. The present work studied the drying of the yam in the form of slices of 1.0 and 2.5cm thickness, as well as in the form of fillets with 1.0 x 1.0 x 5.0cm, with the drying air varying from 40 to 70°C. The equating of the process was accomplished,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yam; Drying; Time; Energy. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612000000200023 |
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| Oliveira,Eliana Monteiro Soares de; Resende,Eder Dutra de. |
| In this study, it was evaluated the influence of different shapes, sizes, and maturation stages on the yield of albedo flour and pectin content of yellow passion fruit rinds. Random samples of 40 fruits were used, and the data were compared using significance intervals at 5%. Weight, skin color, fruit size and shape, pulp yield, mesocarp thickness, amount of epicarp and mesocarp, moisture content, and pectin yield were determined. The maturation stages were defined according to measurements of the yellow color of the skin. The shape and size patterns were defined according to the length/width ratio (equatorial diameter) of fruits. It was found that the epicarp thickness was not correlated to fruit shape and size, but it was thicker in ripe fruits. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passiflora edulis; Waste yield; Fruit size; Fruit shape; Maturation stages. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000300011 |
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| MAJDOUB,Nesrine; KAAB,Leila Bettaieb Ben; VIEIRA,Ana Isabel; FALEIRO,Maria Leonor; EL-GUENDOUZ,Soukaina; MIGUEL,Maria Graça. |
| Abstract Zn treatment effects on the stability of polyphenols, MDA (malondialdehyde) content, antioxidant and lipoxygenase inhibition activities of two varieties of fennel bulbs were studied by using an in vitro gastrointestinal digestion model. Likewise, the effect of Zn on viability cells of E. coli was also performed. The results revealed that high amounts of total phenolic and flavonoid compounds were released during the digestion process, especially after the intestinal phase. Additionally, the antioxidant and lipoxygenase inhibitory activity were affected by the gastrointestinal digestion process and seems to be correlated with total phenol contents. On the other hand, the viability of E. coli was not affected by the activity of our tested bulbs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Foeniculum vulgare; Escherichia coli; Antioxidant activity; Anti-inflammatory activity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612020005005211 |
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| Sousa,Márcia Barbosa de; Pires,Kelma Maria dos Santos; Alencar,Daniel Barroso de; Sampaio,Alexandre Holanda; Saker-Sampaio,Silvana. |
| O objetivo deste trabalho foi avaliar o potencial de 32 espécies de algas marinhas das divisões Chlorophyta, Rhodophyta e Phaeophyta como fontes de α- e β-caroteno e α-tocoferol. Todas as clorofíceas analisadas apresentaram α- e β-caroteno. Os teores máximo e mínimo de α-caroteno foram detectados nas espécies do gênero Caulerpa e em Codium decorticatum, respectivamente; e β-caroteno foi mais baixo em Caulerpa mexicana e mais elevado em Ulva fasciata. Dentre as rodofíceas, 11 espécies apresentaram α-caroteno, com máximo em Botryocladia occidentalis. β-caroteno foi encontrado em todas as algas vermelhas analisadas com teores mínimo e máximo em Gracilaria caudata e Bryothamnion triquetrum, respectivamente. As feofíceas apresentaram apenas β-caroteno, com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algas marinhas; Carotenóides provitamina A; Vitamina E; CLAE. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612008000400030 |
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| Uenojo,Mariana; Pastore,Glaucia Maria. |
| Carotenoids are important constituents of food due to their color and because their degradation products generate important volatile compounds in foods. Aroma compounds derived from carotenoids are widely distributed in nature, and they are precursors of many important aromas in foods such as fruits and in flowers as well. They present high aromatic potential and are therefore of great interest to the industries of aromas and fragrances. In this study, more than 300 previously isolated microorganisms with potential for biotransformation of β-carotene present in the culture medium were selected using the plate method; about 80 strains presented capacity to produce aroma compounds and 7 strains were selected by an untrained panel of tasters to generate aroma... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carotenoids; Biotransformation; Β-carotene; Β-ionone; Aroma. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000300039 |
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| Registros recuperados: 3.119 | |
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