By controlling those parameters , the hydroxymethylated and sulfonated ratios of melamine resin superplasticizer were enhanced , the performances of product also improved 通过控制这些因素提高了密胺树脂高效减水剂的羟甲基化率和磺化率，改善了产物性能。
Scientists finally understand methylation well enough to map out vulnerable areas at a national level , according to krabbenhoft , who is currently working on such a map for the epa 克莱本霍夫特说，科学家对于甲基化的了解，终于足以绘制出全美容易遭到污染的地区。
When chlorotrimethylsilane is added to ( 2 - amino - primidin - 5 - yl ) - methanol derivatives , the methylation would be found . it is a strange reaction which is first reported 氨基5 -羟甲基嘧啶衍生物用三甲基氯硅烷在乙氰溶剂中回流会发生醇的甲基化反应，该现象尚属首次发现。
During this study , the researchers measured the degrees of methylation in tissue remoed from 47 patients who had undergone mastectomies for a form of breast cancer called inasie ductal carcinoma 此研究中，研究者测定了47个患浸润性导管癌而作乳房切除术病人的切除组织的甲基化程度。
Mms , a kind of dna - damaging agent , predominantly methylates ring nitrogens of pyrine , leading to dna double - strand breaks , point mutation and so on 甲磺酸甲酯( methylmetbanesulfonate ， mms )是一种能够损伤dna的烷化剂，主要使dna嘌呤碱基上的o 、 n甲基化，造成dna双链断裂、点突变。
Tumor - suppressor genes normally protect cells from becoming cancerous , but the gradual silencing of these genes by abnormal methylation is thought to be an early change in cancer deelopment 抑癌基因通常是阻止细胞肿瘤化，随着这些基因不正常的甲基化，他们就开始沉默，这被视为肿瘤的早期改变。
Diehloromethyl biphenyl was synthesized through chloromethylation of biphenyl , starting with biphenyl and paraformaldehyde as raw materials , zinc chloride / h2o as catalyst in the presence of hydrogen chloride 摘要以联苯、多聚甲醛为起始原料，氯化锌h2o为催化剂，在氯化氢的存在下经氯甲基化反应，得到了4 , 4 ' -二氯甲基联苯。
By contrast , l - methionine increased the level of methylation and thus reduced the expression of the gene in animals with loving mothers , and led to fear , anxiety and a heightened response to stress 与之相反， l -甲硫氨酸增加了甲基化水平，从而减弱了正常老鼠中糖皮质激素受体基因的表达，导致了恐惧、焦虑和对压力的强烈反应。
For example , the sulfonated and sulfomethlated materials and their derivatives have satisfactorily undergone tests as drilling mud thinners , and the results are comparable to those obtained with commercial mud thinners 比如，将磺化物质、磺甲基化物质及其衍生物作为钻井泥浆稀料进行测试，效果令人满意，其应用效果可以同商业泥浆稀料相媲美。
For example , the suffocated and sulfomethlated materials and their derivatives have satisfactorily undergone tests as drilling mud thinners , and the results are comparable to those obtained with commercial mud thinners 比如，将磺化物质、磺甲基化物质及其衍生物作为钻井泥浆稀料进行测试，效果令人满意，其应用效果可以同商业泥浆稀料相媲美。
