نتایج جستجو برای: Direct Mutagenesis
تعداد نتایج: 451037 فیلتر نتایج به سال:
Background and purpose: Nowadays, food flavorings are widely used in Iran in different food and beverage items without considering their potential threats. This research aimed at investigating directed mutagenesis caused by flavorings using the Ames Test. Materials and methods: Direct mutagenesis of five artificial food flavorings (vanilla, banana, orange, coconut, and lemon), from three diffe...
Background:Characterizing the structure and function of superoxide dismutase (SOD), as an antioxidant enzyme providing opportunities for its application in food supplements. Objectives: In this study, the features of the Manganese-SOD of Lactococcus lactis (SDLL), subsp. cremoris MG1363, as probiotic bacteria, were determined on the ...
It has been proposed that spin-polarized cosmic radiation can induce asymmetric changes in helical biopolymers may account for the emergence of biological homochirality. The parity violation weak interaction direct consequences on transport polarization ray showers. In this paper, we show muons retain their down to energies at which they initiate enantioselective mutagenesis. Therefore, are mos...
Abstract Teratological spores and pollen are widespread in sediments that record the Permian-Triassic mass extinction. The malformations thought to be result of extreme environmental conditions at time, but mutagenic agents precise timing events remain unclear. We examined abundance teratological sporomorphs metal concentrations a tropical peatland succession southwestern China. find significan...
p53 tumor suppressor gene, also known as “genome guardian” is mutated in more than half of allkind of cancers. in this study we have investigated the controls of environmental ph for p53 genemutation in point of specific sequence which is prone to mutagenesis. the most probable cancerousmutations occur as point mutations in exons 5-8 of p53 gene. the 175th codon of p53 is the thirdmost mutated ...
Background and Objective: Nowadays, colors are widely used in various food industries, including sweets, confectionery, ice cream, beverages, and so on. Colors can have asthma-like complications, hyperactivity in children and cancers. Therefore, the aim of this study was to evaluate the direct mutagenic effect of several types of natural colors via Ames method. Materials and Methods: After pre...
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