脒

The new synthetic insecticide amitraz was used to evaluatd the cidaleffect on human Demodex mites in vitro.

应用新合成杀虫剂双甲脒对人体蠕形螨进行体外药物试验。

In chapter four, the preperation of ytterbium diiodide was examined. The reductive cleavage of Se-Se bond and S-S bond induced by ytterbium diiodide was investigated. The reaction of diselenides and disulfides with allylic bromide promoted by ytterbium diiodide was also examined. The intermolecular Barbier-type reaction induced by ytterbium diiodide was studied. In the last section of this chapter, the intermolecular reductive coupling of nitriles with azides induced by samarium diiodide was investigated.

第四章，研究了二碘化镱的制备方法，以及二碘化镱作为一种优良的单电子转移试剂在有机合成中的应用：二硒醚的Se--Se键和二硫醚S-S键的还原断裂，及其在合成烯丙基硒醚，硒代酯和烯丙基硫醚，硫代酯中的应用，实验结果表明二碘化镱也能促进分子间的Barbier反应，而文献认为二碘化镱不能促进分子间的Barbier反应；最后研究了二碘化钐促进的叠氮化合物与腈的交叉还原偶联反应，一步高收率地制备脒的方法。

Preparation of formamidine sulphinic acid with thiourea and hydrogen peroxide by aqueous solvent process was researched.

研究了硫脲与双氧水水溶剂法制备甲脒亚磺酸的反应。

The influence of several main process variables and some metals ions on pulp bleaching with formamidine sulphinic acid was investigated and discussed.

研究和讨论了一些主要过程参数的影响和某些金属离子对甲脒亚磺酸在纸浆漂白中的影响，同时对FAS漂白过程中添加螯合剂的作用做了深入研究，结果表明螯合剂的加入能改善FAS的漂白能力

This paper deals with the effect of N-1, 2-dimethylpheny1-N-methyl formamidine hydrochlorideon algal community structure in model pond ecosystem s of 3m3 within 90 days.

0mg／L的浓度范围内，单甲脒农药对模型池塘生态系统中的浮游植物群落结构有明显影响。

This paper introduces the bleaching method of deinked pulp ,the preparation,physical_chemical properties and decolorizing mechanism of formamidine sulfinic acid,and the experiment of FAS bleaching of deinked pulp .

简要介绍了废纸浆的漂白方法、甲脒亚磺酸的制备原理、物理化学性质及漂白脱色机理，还介绍了用FAS漂白旧新闻纸脱墨浆的实验情况。

Two synthetic routes starting from 1,3-dihydroxyacetone and formamidine acetate as well as imidazole-4,5-dicarboxylic acid as starting material were investigated, and the reductive reaction of ethyl imidazole-4-carboxylate was also investigated.

本文对以1，3-二羟基丙酮和醋酸甲脒为原料和以4，5-二羧酸咪唑为原料合成4(5)-羟甲基咪唑的两条工艺进行了研究并优化，同时对4(5)-羧酸咪唑乙酯的还原反应进行了探索性实验。

Wood CTMP was bleached with formamidine sulphinic acid.

本文用甲脒亚磺酸漂白CTMP浆，通过药液 pH值变化及漂白效果探讨FAS的溶解性、稳定性。

Dihydroxyacetone; formamidine acetate; imidazole-4,5-dicarboxylic acid; optimizing process; ethyl imidazole-4-carboxylate; reductive reaction; 4(5)-hydroxymethylimidazole

关键字或关键词组： 1，3-二羟基丙酮；醋酸甲脒；4，5-二羧酸咪唑；工艺优化；4(5)-羧酸咪唑乙酯；还原反应；4(5)-羟甲基咪唑

The thermo decomposition of fire retardant FRW and its main components boric acid and guanylurea phosphate and the pyrolysis of basswood treated with boric acid, basswood treated with GUP, basswood treated with FRW and untreated basswood was analyzed by thermogravimetry and differential thermoanalysis.

摘 要：采用热重和差热分析法，对木材阻燃剂FRW及其主要组分硼酸B）和磷酸脒基脲、硼酸处理紫椴木材、GUP处理紫椴木材、FRW处理紫椴木材以及未处理紫椴木材进行了系统的热解行为研究。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。