无毒的

A series of 3,3,6,6 tetramethyl 1,8 dioxo 9 aryl 1,2,3,4,5,6,7,8,9,10 decahydro acridines have been synthesized by the condensation of aromatic aldehydes, 5,5 dimethyl 1,3 cyclohexanedione and ammonium acetate in the presence of triethylbenzylammonium chloride as catalyst in water.

芳醛、5 ，5 二甲基 1，3 环己二酮与醋酸铵在三乙基苄基氯化铵催化下以水作为溶剂反应，生成一系列 3 ，3 ，6，6 四甲基 1，8 二氧代 9 芳基 1，2 ，3 ，4，5 ，6，7，8，9，10 十氢吖啶，与其它溶剂相比，水作为该反应的溶剂具有价格便宜，不易燃和无毒等优点，而且产率较高，产物的结构通过单晶X射线确

With regard to the current society, much hubbub in the European Union ban on the use of four kinds of children's toys, plasticizers, Jiangnan University, and Dr. LG Chemical in two epoxy esters, briefed the meeting on high molecular weight plasticizers, citrate butyl ester, such as trimellitic several environment-friendly non-toxic plasticizer that can be replaced ethylhexyl phthalate, ethylhexyl adipate, whether it is synthetic process, the source of raw materials are not a problem, but there are differences in price, but into the large-scale production, the price will be decreased substantially.

关于目前社会上闹得沸沸扬扬的欧盟禁止在儿童玩具中使用四种增塑剂，江南大学和LG化学的两位博士在会上介绍了环氧酯类高相对分子质量增塑剂、柠檬酸三丁酯、偏苯三酸酯等几种无毒环保型增塑剂，认为完全可以取代邻苯二甲酸乙基己酯、己二酸乙基己酯，无论是合成工艺、原料来源都不成问题，只是在价格上还有些差异，但进人大规模生产后，价格会有较大幅度下降。

The percentage of active transmission of small brown plant hopper varied with the infection stage of RBSDV in maize cell while the nymph acquiring feeding. There were 2.93% and 7.83% of viruliferous rate resp

用灰飞虱无毒若虫在细胞内病毒基质出现和病毒增殖期饲毒的，到成虫时分别有2.93%和7.83%个体传毒率；在细胞内病毒成串分布于管状结构和晶格状聚集排列期饲毒的，到成虫时均不能传毒。

Bioflocculants, having good flocculating activity, are the metabolic products of the microorganism, which are safe, non-toxic and can be biodegraded easily.

微生物絮凝剂是一类由微生物产生并分泌到细胞外具有絮凝活性的生物活性物质，具有良好的絮凝沉淀性能，安全、无毒，易于生物降解。

However Chinese native medicine by no means non-toxic its toxic production with concocts blends the amount used and so on concerns.

然而，中药并非无毒，其毒性的产生与炮制，配伍，用量等有关。中药毒性学领域至今无统一的毒性分级定量标准。

In the machinery industry, the sodium citrate is widely used for replacing sodium cyaniding to clean the metal surface of heat exchanger metal surface and the chemical pipeline, because of its nonpoisonous, no pollution, high combine performance , it is good buffer and complexing agent in the electroplate industry.

在机械造业中，柠檬酸纳由于无毒、无污染，高整合性能，因此广泛用于替代氰化钠，处理金属表面热交器和化工管道的清洗剂，是电镀工业良好的缓冲剂和络合剂。

Because of its nonpoisonous, DMC can substitute phosgene , dimethyl sulfate or methylating used as methyl pharmaceutical to improve the security of production and reduce the environmental pollution; As the solvent, DMC can substitute fluorine lyons , methyl chloroform , trichloroethylene , benzene , dimethylbenzene, etc.. And it can be used as the paint dope, clean solvent. As gasoline additive, DMC can raise hard octane value and oxygen content and improve its antiknock possibility.

由于DMC无毒，可替代剧毒的光气、硫酸二甲酯等作为甲基化剂或羰基化剂使用，提高生产操作的安全性，降低环境污染；作为溶剂，DMC可替代氟里昂、三氯乙烷、三氯乙烯、苯、二甲苯等用于油漆涂料、清洁溶剂等；作为汽油添加剂，DMC可提高其辛烷值和含氧量，进而提高其抗爆性。

Owing to the loss of product and unsafe circumstance when oil-gas products were loaded into uncorked tank cars in petrochemical enterprises, an improved technique was obtained by the following measures in Zhongyuan Oil-field Natural Gas Process Factory: using the technique of close loading and oil-gas absorption with current nontoxic diluent as absorber at low temperature, the oil-gas vaporized was recovered and returned to the raw material processing.

针对石化企业敞口槽车充装油气产品造成产品损耗及安全隐患的情况，中国石化中原油田天然气处理厂利用密闭装车技术和低温吸收技术，以现有的无毒稀释剂作为吸收剂，将气相挥发产品回收并返至原料重新处理，成功地对原工艺进行了改造。

This paper gives an overview of development of substitutes for lead pigment abroad,which are new type nontoxic anticorrosive pigments,rightfitted organic pigments,rutile mixed phase pigments,bismuth vanadate yellow,rare earth pigments and safe yellow.

介绍了国外含铅颜料代用品的开发情况，它们是新型无毒防锈颜料、正确调整的有机颜料、金红石型混相颜料、钒酸铋黄、稀土颜料和安全黄。

Bryant said there were 140 snakes in the pool -- mainly anacondas and red-bellied snakes, but no black mambas because "they're a little too deadly."

科比说那是一个装有140条蛇的池子大部分是无毒蟒蛇和 red-bellied 蛇。不过却没有黑曼巴因为那种蛇的毒性太强了。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。