查询词典 methylation

Results showed that the optimum condition in carboxy methylation were: 15 percent sodium hydroxide , 20 % chloroacelic acid, alkalified 35℃, etherification 50℃, etherification time 120 min.

甜菜膳食纤维羧甲基化改性的最佳条件：15％氢氧化钠、20％一氯乙酸、35℃碱化温度、50℃醚化温度、2.0h醚化时间。

Based on the experimental results, it could be consequentially concluded that N-methoxycarbonylation of aromatic amines was followed by the exclusive N-methylation of methyl N-aryl carbamates during the reaction process.

苯环上有钝化基团的一级芳胺反应活性比较好，获得N-甲基-N-芳基氨基甲酸甲酯的产率较高，反应时间也较短；而苯环上活化基团的存在，则会降低一级芳胺的反应活性。

Some stimulators, including viruses, tumor cells and hot shock, could promote the expression of NKG2 receptors and their ligands via activating certain transcription factors which are capable of up-regulating NKG2 promoters' activity. Meanwhile, epigenetic mechanisms including DNA methylation and histone posttranslational modifications are also critical to expression of NKG2 receptors and their ligands and may control the clonally distribution of some NK cell receptors.

病毒、肿瘤和热休克等刺激可以通过激活相应的转录调节因子，提高启动子活性而上调NKG2家族受体及其配体的表达，而启动子区DNA的甲基化状态、组蛋白的乙酰化和甲基化等表观遗传调控，在NK细胞受体及其配体的表达方面亦起重要作用，并决定NK细胞受体的克隆性分布。

DNA methylation is a kind of ordinary pheonemena in eukaryote.

DNA甲基化是高等真核生物中经常发生的现象，这种表观遗传学改变常发生在基因的启动子区域，并且不改变DNA序列和遗传密码，具有可逆性，在基因转录调控中发挥重要作用。

The function of plant genomes depends on chromatin marks such as the methylation of DNA and the post-translational modification of histones.

植物基因组的功能依赖于染色质标记，诸如DNA的甲基化和组蛋白的转录后修饰。

Studies on many aspects show that there are four main reasons which cause the epigenetic effects;the methylation of DNA,the acetylation of histones,the change of chromatin structure and the alteration of protein configuration.

多方面的研究表明，导致后生效应的可能原因主要有四个方面：DNA的甲基化、组蛋白的乙酰化、染色质结构背景的改变和蛋白质构型的变化。

Methods: forty seven cases of nasal nk/t cell lymphomas were studied by using methylation specific pcr.

选用12例已经确诊的鼻nk/t细胞淋巴瘤的冰冻组织标本和35例石蜡组织标本。

Those little tykes, just 24 nucleotides long, are somehow responsible for methylation of DNA sequences that match the sequence of the siRNAs, but not without a lot of help from their friends.

这些siRNAs，仅仅具有24个核苷酸的长度，负责甲基化与它自身序列配对的DNA序列，这种过程是在其他&朋友&的帮助下进行的。

Those little tykes, just 24 nucleotides long, are somehow responsible for methylation of DNA sequences that match the sequence of the siRNA s, but not without a lot of help from their friends.

这些 siRNA s，仅仅具有24个核苷酸的长度，负责甲基化与它自身序列配对的DNA序列，这种过程是在其他&朋友&的帮助下进行的。

Objective To assess the clinical value of methylation- specific polymerase clain reaction in the diagnosis of gastric cancer.

目的初步探讨甲基化特异性聚合酶链反应在胃癌临床诊断中的应用价值。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。