Yeast invertase
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Volcanic ejecta or lahar can serve as an inorganic support for the immobilization of invertase. Pampanga and Bicol lahar samples were pretreated by ignition at 550o C for 5 hrs followed by concentrated hydrochloric acid treatment, activated by reaction with aminopropyltriethoxysilane (APTS) and then covalently bound to invertase using glutaraldehyde as linker. Chemical tests confirmed the attachment of APTS to lahar and glutaraldehyde to silanized lahar. The quantity of immobilized invertase on Pampanga white, Pampanga black and Bicol black lahar were 98.73%, 96.73% and 84.27%, respectively.
14p 12120609 01-06-2020 10 1 Download
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The enzyme invertase is produced by Saccharomyces cerevisiae. It hydrolyzes sucrose into glucose and fructose, having a great utility industrially. With this it is necessary to know its main characteristics to be able to know how to optimize it. In this research the enzyme invertase was worked in two types of reactors very common in the industrial area, the batch reactor and the fixed bed reactor. In the experiments described here, the type of reaction involved in hydrolysis, whether exothermic or endothermic, and what is its activation energy was determined.
11p cothumenhmong4 25-03-2020 17 1 Download
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Effective invertase enzyme production was achieved with orange peel as carbon source compared to all other tested also residues. Among different nitrogen sources, yeast extract supported maximum enzyme production. Various fermentation parameters (pH of the medium, incubation temperature, time, volume in addition to carbon and nitrogen sources) also influenced the rate of invertase production. Maximum enzyme production of 55 units was observed in the medium of pH 4 containing 2% of orange peel having particle size of 3-1.
8p kethamoi2 15-12-2019 9 1 Download
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Physiological conditions in the growth habitat of yeast cells dramatically changes the gene expression pattern. In this study, it was shown that transcription of the SUC2 gene, which encodes the cytoplasmic and secreted enzyme invertase, is modulated according to the environmental conditions in the yeast Saccharomyces cerevisiae.
8p caplock2711 19-02-2019 40 0 Download
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The growth of baker's yeast Saccharomyces cerevisiae in medium containing sucrose requires a high level of extracellular invertase enzyme activity. We also found that industrial yeast strains are more sensitive to hyperosmotic stress than the laboratory strains of S. cerevisiae used in this study.
7p vitamix 19-02-2019 36 0 Download
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Glucose signaling controls a wide range of metabolic events in the yeast Saccharomyces cerevisiae. Glucose sensing and signaling processes require a variety of membrane-bound and cytoplasmic sensor proteins. Pho85p is a cyclin-dependent protein kinase that controls different metabolic events upon binding to its cyclin partners in the cytoplasm of yeast cells.
6p vivant2711 15-02-2019 26 2 Download
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Nấm men bia thuộc loài Saccharomyces cerevisiae, có hoạt tính enzyme invertase (EC 3.2.1.26). Enzyme này thường tập trung chủ yếu trong lớp không gian chu chất của tế bào nấm men [3,4]. Ngành công nghiệp sản xuất bia hàng năm thải ra một lượng rất lớn bã nấm men bia. Trung bình sản xuất 100 lít bia sẽ thu được 2 lít bã nấm men với độ ẩm 88%. Hiện nay, bã nấm men bia được sử dụng để sản xuất bột chiết nấm men (yeast extract) hoặc làm thức ăn gia súc....
7p lananh27109 14-09-2011 163 25 Download
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Enzyme này thường tập trung chủ yếu trong lớp không gian chu chất của tế bào nấm men [3,4]. Ngành công nghiệp sản xuất bia hàng năm thải ra một lượng rất lớn bã nấm men bia. Trung bình sản xuất 100 lít bia sẽ thu được 2 lít bã nấm men với độ ẩm 88%. Hiện nay, bã nấm men bia được sử dụng để sản xuất bột chiết nấm men (yeast extract) hoặc làm thức ăn gia súc [5].
7p vanthang122141 07-05-2011 455 113 Download