利用反相高效液相色谱-质谱联用方法分析了甲锭前体甲基化产物。
The analysis of methidium's precursor methylates was carried out by reversed phase liquid chromatography with UV and MS detectors.
首次分离、纯化了甲基化反应的重要副产物，经元素分析、氢谱、质谱确定为双甲基化产物。
A byproduct in the methylating reaction was separated, purified and determined to be of the dimethylated product for the first time.
结果100%的新鲜组织和24.1%的石蜡包埋组织至少可以得到甲基化和非甲基化产物中的一种产物。
Results 100 % of frozen tissues and 24.1% of paraffin-embedded tissues could get either methylated production or unmethylated production.
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。
By controlling those parameters, the hydroxymethylated and sulfonated ratios of melamine resin superplasticizer were enhanced, the performances of product also improved.
采用磺甲基化反应对聚丙烯酰胺进行了改性。探讨了反应条件对产物性能的影响。
The polyacrylamide was modified by sulfomethylation and the effects of reaction conditions on properties of modified product were investigated.
结果：反应主要控制在单甲基化阶段，且通过适当的后处理方法，可得产物含量较高的固体纯品。
METHODS Phase-transfer catalytic methylation and suitable method of aftertreatment were used. RESULTS The yield and content was both improved.
结果表明，在淹水条件下羊毛的腐化分解产物为土壤微生物提供了碳源、氮源，使其对汞的生物甲基化能力增强。
This may be due to the fact that the wool's decomposed products can offer carbon and nitrogen nutrients to soil microorganisms and enhance the methylation of mercury.
结果表明，在淹水条件下羊毛的腐化分解产物为土壤微生物提供了碳源、氮源，使其对汞的生物甲基化能力增强。
This may be due to the fact that the wool's decomposed products can offer carbon and nitrogen nutrients to soil microorganisms and enhance the methylation of mercury.
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