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| Registros recuperados: 43 | |
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| Han,Lirong; Feng,Juntao; Zhang,Shuangxi; Ma,Zhiqing; Wang,Yonghong; Zhang,Xing. |
| The efficiency of enzymatic hydrolysis of cellulose can be improved by various pretreatments of the substrate. In order to increase the efficiency of enzymatic saccharification of the wheat straw, we determined the effect of different pretreatments on the physical structure, chemical components and enzymatic saccharification of wheat straw. Our results showed that combination of grinding and sodium hydroxide (NaOH) treatment had high effect on the enzymatic hydrolysis of wheat straws. The optimal pretreatment condition was to grind the wheat straws into the sizes of 120 meshes followed by treatment with 1.0% NaOH for 1.5 h (121°C/15psi). Under this condition, the cellulose content of wheat straw was increased by 44.52%, while the content of hemicellulose... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cellulase; Cellulose; Fermentation; Hydrolysis; Lignocellulosic; Pretreatment. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100006 |
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| ROMERA, C. M.; SANTOS, C. F. dos; TURATI, D. F. M.; NAKAI, D. K.; JUNGMANN, L.; MENDES, T. D.; PACHECO, T. F.; RODRIGUES, D. de S.. |
| Resumo: Um dos principais desafios da coleta e extração de óleo de frutos de dendê (palma de óleo) é a manutenção da qualidade do óleo, de forma a evitar a liberação de ácidos graxos, que mudam as propriedades do óleo e, consequentemente, reduzem seu valor comercial. A liberação desses ácidos é atribuída à ação de lipases. Entretanto, não há um consenso quanto à fonte das enzimas que hidrolisam excessivamente o óleo, se ela é endógena (produzida pelo próprio fruto de dendê) ou exógena (produzida por um determinado microrganismo que colonizou o fruto de dendê). Neste trabalho, a verificação da presença de lipases no mesocarpo de frutos de dendê foi realizada por meio de reações de hidrólise. Dessa maneira, as proteínas contidas no mesocarpo de dendê foram... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Frutos de dendê; Palma de óleo; Dendê; Ácido Graxo; Lípase; Hidrolise; Acidificação; Palm oils; Hydrolysis; Acidification; Fatty acids. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1132216 |
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| Ruiz, A.; Mejías, E.; González, J.; Silveira, I.; Cárdenas, M. E.; Padrón, X.. |
| Mediante la acción de la papaína se puede obtener un hidrolizado parcial de la leche de soya en la que se superan algunas deficiencias organolépticas inherentes al frijol de soya o al proceso de obtención de la misma, aún así para su consumo debe ofrecerse bajo la forma de una bebida saborizada. Para formular dicha bebida se emplearon cuatro saborizantes: cocoa micropulverizada (CHC), sabor chocolate microencapsulado en polvo (CHP), sabor chocolate líquido (CHL) y sabor café microencapsulado en polvo (SCP); como endulzantes se emplearon azúcar, aspartame y una mezcla 50 % de aspartame + acesulfame. Se tomaron como variables independientes la cantidad de saborizantes y la de edulcorantes que se combinaron según sendos planes factoriales 22 con punto... |
| Tipo: Journal Contribution |
Palavras-chave: Hydrolysis; Food processing; Palatability. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/4703 |
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| Romão,C.O.; Carvalho,G.G.P.; Leite,V.M.; Santos,A.S.; Chagas,D.M.T.; Ribeiro,O.L.; Oliveira,P.A.; Magalhães,A.F.; Pires,A.J.V.. |
| The aim of this study was to identify the most adequate level of calcium oxide (CaO) in the treatment of sugar cane by evaluating the chemical composition and in vitro digestibility of dry matter. The sugar cane was homogenized with CaO levels 0, 0.75, 1.5, 2.25, 3.0, 3.75 and 4.5%, in natura matter, for 24 hours. The dry matter and mineral matter increased, while the organic matter of the sugar cane decreased (P <0.05) linearly as a result of the CaO levels. The CaO had no effect on the levels of crude protein and ether extract. The phosphorus concentration remained unchanged, but there was a significant increase (P<0.05) in the calcium content. The contents of neutral detergent fiber, acid detergent fiber and cellulose decreased linearly with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additive; Forage; Hydrolysis; Saccharum; Alkaline treatment. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000200029 |
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| Spyridon,Achinas; Willem Euverink,Gerrit Jan. |
| Bioethanol production is one pathway for crude oil reduction and environmental compliance. Bioethanol can be used as fuel with significant characteristics like high octane number, low cetane number and high heat of vaporization. Its main drawbacks are the corrosiveness, low flame luminosity, lower vapor pressure, miscibility with water, and toxicity to ecosystems. One crucial problem with bioethanol fuel is the availability of raw materials. The supply of feedstocks for bioethanol production can vary season to season and depends on geographic locations. Lignocellulosic biomass, such as forest-based woody materials, agricultural residues and municipal waste, is prominent feedstock for bioethanol cause of its high availability and low cost, even though the... |
| Tipo: Journal article |
Palavras-chave: Bioconversion; Bioethanol; Fermentation; Hydrolysis; Renewable fuels. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000500009 |
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| Le, Minh Chau. |
| Fish sauces are traditionally used in most Asian countries. Whatever the process, the principle is the same i.e. a fish autolysis in saline media followed by a fermentation step. Not less than 18 months are needed to obtain a brown liquid rich in salt and amino acids. This PhD work aims to determine if an addition of proteases can speed up the process while keeping the nutritional and sensorial properties. The first chapter presents the characteristics of fish sauces and the key parameters of the processes used. In the second chapter, several industrial proteases are compared each other for their capacity to liquefy the fishes in hyper saline conditions. Kinetics of proteolysis and biochemical characteristics of the resulting hydrolysates are established... |
| Tipo: Text |
Palavras-chave: Sauce de poisson; Hydrolyse; Enzyme; Protéase; Sardine; Anchois; Fish sauce; Hydrolysis; Enzyme; Protease; Sardine; Anchovy. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00259/36997/35488.pdf |
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| Derombise, Guillaume; Van Schoors, Laetitia Vouyovitch; Davies, Peter. |
| Technora fibres are high performance aramid fibres which have been used in ropes and protective clothing for many years. They are also now being proposed as geotextiles for soil reinforcement. However, there is a lack of experience on the long-term behaviour of Technora fibres in an alkaline environment (lime-treated ground.). Consequently, aging studies have been performed under different conditions (deionised water, pH9 and pH11). Hydrolytic degradation has been evaluated by FTIR, viscometry, TGA, density measurements, SEM, and by tensile measurements. Some chain degradation and finish rearrangements have been highlighted, but Technora fibres retain their mechanical properties for all the conditions considered here. |
| Tipo: Text |
Palavras-chave: Aramids; Fibres; Technora; Hydrolysis; Long-term behaviour. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00002/11289/8052.pdf |
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| Le Gac, Pierre-yves; Choqueuse, Dominique; Melot, D.. |
| Polymers are widely used for passive thermal insulation coatings on steel pipe in offshore oil and gas production. In this industry, structures used in deep sea have to be reliable, as they are in service for more than 20 years in a very severe environment: sea water, hydrostatic pressure and temperature gradient. One of the main questions is how to test and predict the lifetime of such structures in the laboratory? This study presents one approach that has been developed to characterize and predict the degradation of polymers used as thermal insulation materials. This paper is dedicated to polyurethane (polyether based) degradation in sea water at high temperature. Ageing has been performed in natural sea water under hydrostatic pressure at temperatures... |
| Tipo: Text |
Palavras-chave: Polyurethane; Hydrolysis; Accelerated ageing; Sea water; Coating; Offshore. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00160/27132/25330.pdf |
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| Pietrobon,Vivian Cristina; Monteiro,Regina Teresa Rosim; Pompeu,Georgia Bertoni; Borges,Eduardo Poggi e; Lopes,Mario Lucio; Amorim,Henrique Vianna de; Cruz,Sandra Helena da; Viégas,Ellen Karine Diniz. |
| The aim of this study was to evaluate the performance of enzymatic hydrolysis of acid or alkali pretreated sugarcane bagasse for the production of fermentable sugars. The first step consisted of selection of commercial enzymes presenting the highest cellulolytic activities. After selection of four enzymes: HPL, CL, P1 and P4, their performances were tested in the bagasse pretreated with acid and alkali. The sugar content of the hydrolysates was analyzed by anion exchange liquid chromatography. Data showed that the joint action of 0.5% acid pretreatment, 121ºC, 30 minutes and enzyme CL provides the best results, 67.25 g of hexose and 148.13g of pentose per kg of dry bagasse. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bagasse sugarcane; Hydrolysis; Cellulolytic enzymes; HPAEC. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200002 |
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| Registros recuperados: 43 | |
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