نتایج جستجو برای: 60 c at ph range of 65
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Extracellular lactase (beta-d-galactosidase, EC 3.2.1.23) was prepared as an ethanol precipitate from a culture of Fusarium moniliforme grown on whey. The enzyme functioned optimally at pH 3.8 to 5.0 and at 50 to 60 degrees C on both o-nitrophenyl-beta-d-galactopyranoside (ONPG) and lactose. The activation energy of the enzymic hydrolysis of ONPG and lactose in the range of 20 to 55 degrees C w...
introduction: the need for food produced from animal husbandry has made it a growing industry which result in increment of livestock waste. on the basis of environmental and economic considerations, these materials require treatment and management. anaerobic digestion and creation of biogas are the most effective methods of waste management. several parameters affect the anaerobic digestion of ...
based on the latest records of typhlops vermicularis merrem, 1820 from iran, this species is distributed in the northern and southern regions of the country. in this study, new records of typhlops vermicularis are presented and it is shown that distribution range of this species is extended towards the eastern and western iran, and according to the new distribution map, it can be assumed that t...
Polymorphisms. BamHI, EcoRI, and TaqI restriction fragment length polymorphisms at the bovine calpastatin locus. Source and Description of Probe. A 2.2-kb cDNA insert coding for Domains 2 through 4 plus a 3’ untranslated region of the bovine calpastatin gene was excised from the pBluescript vector (Stratagene, La Jolla, CA) with EcoRI and XhoI. Method of Detection. Nylon filters were prehybridi...
An experiment was carried out to evaluate effects of temperature, pH, and incubation time on the stability of intrinsic phytases. The experiment was conducted as a 3*4*3*3 factorial arrangement with 3 feed ingredients (rye, wheat, and barley), 4 temperatures (T) (20, 38, 55, and 80°C), 3 pH levels (3, 5.5, and 8), and 3 incubation times (30, 60, and 120 min), with 2 replicates per treatment. Af...
Two aspartate aminotransferase (EC 2.6.1.1) isoenzymes (AAT-1 and AAT-2) from Lupinus albus L. cv Estoril were separated, purified, and characterized. The molecular weight, pI value, optimum pH, optimum temperature, and thermodynamic parameters for thermal inactivation of both isoenzymes were obtained. Studies of the kinetic mechanism, and the kinetics of product inhibition and high substrate c...
food safety is considered as an important world concern. the detection of pathogen and toxic materials in food has an important role in public health care. in recent years, the applications of microbial biosensor have been developed as a new approach for toxicity control. luminescent microbial biosensor is an appropriate biological tool for protection of natural environment. this type of biosen...
critical thinking ability has an important role in education. accordingly, scholars around the world are searching for new ways for teaching and improving students critical thinking ability. in line with the studies in efl contexts supporting the positive relationship between critical thinking and writing performances, this study investigated the differential effects of halverson’s critical thi...
Aim: Changes in the pH of chronic wounds can inhibit the optimal activity of various enzymes in the wound environment, thereby delaying wound healing. The aim of the present study is to monitor the effect of limited access dressing (LAD) on the pH on the surface of chronic wounds. Methods: A total of 140 patients with chronic wounds of more than 4 weeks duration were divided into two groups by ...
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