Leather
Mostrando 13-24 de 127 artigos, teses e dissertações.
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13. Protease with collagenolytic activity produced by Bacillus sp. DPUA 1728 from Amazonian soil
Qualitative analyses were carried out on solid medium with insoluble collagen 0.25% (w/v) to detect proteases with collagenolytic activity produced by Bacillus sp. In cultures incubated for 24 h, a 23 full factorial design with four repetitions at the center point was developed to analyze the effects and interactions between initial pH, temperature and the c
Braz. J. Microbiol.. Publicado em: 27/10/2015
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14. Characterization and antimicrobial performance of nano silver coatings on leather materials
In this study, the characterization and the antimicrobial properties of nano silver (nAg) coating on leather were investigated. For this purpose, turbidity, viscosity and pH of nAg solutions prepared by the sol-gel method were measured. The formation of films from these solutions was characterized according to temperature by Differential Thermal Analysis-The
Braz. J. Microbiol.. Publicado em: 2015-03
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15. PREPARATION AND PERFORMANCE STUDIES ON POLYETHERSULFONE ULTRAFILTRATION MEMBRANES MODIFIED WITH GELATIN FOR TREATMENT OF TANNERY AND DISTILLERY WASTEWATER
Abstract In this study polyethersulfone ultrafiltration membrane were prepared with the modifier gelatin at 0, 5, 10, 15 and 20 wt % using DMF as solvent by phase inversion process. Morphologies and characteristics of the membranes were investigated through the methods of SEM, XRD, contact angle measurements. The performance of the modified membrane for the
Braz. J. Chem. Eng.. Publicado em: 2015-03
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16. In vitro antioxidant capacity of tea of Echinodorus grandiforus, “leather hat,” in Wistar rat liver
O estresse oxidativo tem sido referido como um dos fatores responsáveis pelo desencadeamento de hepatopatias, sendo necessárias novas formas de tratamento. O presente estudo teve como objetivo avaliar a capacidade antioxidante in vitro do chá de Echinodorus grandiforus “Chapéu de couro” em fígado de ratos. Nas diferentes preparações de chá foram
An. Acad. Bras. Ciênc.. Publicado em: 22/07/2014
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17. Frog meat microbiota (Lithobates catesbeianus) used in infant food
Captive breeding of bullfrog (Lithobates catesbeianus) is of great economic potential, mainly for its thighs and leather. The nutritional quality of frog meat includes properly balanced amino acids with a protein profile of high biological value, low fat and low cholesterol, and high digestibility due to its short chain molecule structure. It is recommended
Food Sci. Technol. Publicado em: 25/02/2014
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18. Enhanced production of Aspergillus tamarii lipase for recovery of fat from tannery fleshings
The influence of various oil cakes has been investigated for high level production of lipase using Aspergillus tamarii MTCC 5152. By solid state fermentation in wheat bran containing 2.5% w/w gingili oil cake at 70% v/w moisture content the fungus produced a maximal yield of lipase (758 ± 3.61 u/g) after 5 days of incubation using 2% v/w inoculum containing
Braz. J. Microbiol.. Publicado em: 2013-12
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19. Aluminothermic reduction of Cr2O3 contained in the ash of thermally treated leather waste
In this study the viability of utilising ashes with high chromium oxide content, obtained by thermal treatment of footwear leather waste, in the production of low-carbon ferrochromium alloy (Fe-Cr-LC) by aluminothermic reduction was investigated. The following key-factors were selected for process modelling: the quantity of aluminium (Al) employed in the rea
Braz. J. Chem. Eng.. Publicado em: 2013-03
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20. Extraction and on-fiber derivatization of chlorophenols in leather by internally cooled solid phase microextraction
Neste estudo é proposto um novo procedimento analítico para a determinação de fenóis em amostras de couro utilizando a técnica de microextração em fase sólida refrigerada internamente (CF-SPME) com derivatização direta na fibra e cromatografia gasosa acoplada a espectrometria de massas com monitoramento de íons selecionados (GC-SIM-MS). As condi�
J. Braz. Chem. Soc.. Publicado em: 2012-12
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21. Application of enzymes in leather processing: a comparison between chemical and coenzymatic processes
The use of biotechnology by tanneries has increased in recent years. Enzymes can be applied during different steps of the leather production process: soaking, dehairing, bating, dyeing, degreasing or in effluent and solid waste treatment. This study evaluated the performance of five commercial enzymes in soaking and unhairing/liming by comparing the chemical
Braz. J. Chem. Eng.. Publicado em: 2012-09
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22. Potential of wet blue leather waste for ruminant feeding
The objective of this study was to find an alternative to minimize environmental contamination by leather waste using it as ruminant feed. The wet blue leather wastes (WB) without chrome extraction were compared with the leather wastes in which the chrome was extracted (CE). Both materials had 99.7% of dry matter (DM), but the crude protein level was higher
Revista Brasileira de Zootecnia. Publicado em: 2012-04
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23. Effect of Chemically Treated Leather Shaving Addition on characteristics and microstructure of OPC mortars
The growing concern with environmental issues in tanneries and the search for a technological solution to their wastes are evaluated in this study. The leather shaving was chemically treated aiming the immobilization of the chromium ion on ordinary Portland cement (OPC) matrix. Cementitious mortars were obtained by adding different proportions of waste treat
Materials Research. Publicado em: 31/01/2012
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24. Dinâmica do cromo em solos fertilizados com proteína hidrolisada de couro / Dynamics of chromium in soil fertilized with leather hydrolysate
This study intends to subsidize the decision for utilizing leather hidrolysate as fertilizer in the state of Rio Grande do Sul. The distribution and potential mobility of chromium in different soils, applied in increasing amounts of leather hidrolysate were investigated. The analyses involved sequential fractioning procedure and speciation of chromium, in ad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012