查询词典 esters

A series of neutral organophosphorus compounds including trialkylphosphates,dialkyl alkylphosphonate,alkyl dialkyI phosphinate,trialkyl phosphine oxide andalkyl esters of phosphorus acid have been separated by reversed phase chromatographyon acetylated paper.

一般中性磷化合物(磷酸三烷基酯、烷基瞵酸二烷基酯、二烷基瞵酸烷基酯、氧化三烷基瞵、亚磷酸二烷基酯及亚磷酸三烷基酯)皆能借乙酰化滤纸为固定相，进行纸上层析分离鉴定。

A series of trimethylolhexane triheptyl esters were synthesized from trimethylolhexane with special kinds of supported phosphotungstic acid catalyst.

以自制三羟甲基己烷为原料，采用自制的负载磷钨酸催化剂催化合成一系列三羟甲基己烷脂肪酸酯。

To establish a method for determining 5 kinds of phthalic acid esters in foods.

目的 建立一种同时测定食品中5种邻苯二甲酸酯类残留的方法，调查这5种物质在食品中的污染情况。

Soil is to certain degree polluted by phthalic acid esters, which have harmful impact on human health.

农产品安全是全社会共同关心的热点问题，它有赖于良好的土壤环境质量。

Phthalic acid esters were one of most important environmental hormones.

邻苯二甲酸酯是一类重要的环境激素。

Objective To find out the level of phthalic acid esters pollution of vegetables,fruits, and dried food in the market.

目的了解市售蔬菜水果及干货食品中酞酸酯的污染状况。

Some phthalic esters are precedent-controlled harmful pollutants to the Environmental Protection Agency.

其中一些属于美国国家环保局优先控制的环境激素类污染物。

Phthalic acid esters are an important group of environmental hormones.

邻苯二甲酸酯类化合物就是其中一类重要的环境激素，它主要用作增塑剂。

Research of four Phthalic Acid Esters′ biodegradation was carried out with two strains separated from the acclimated sludge.

从驯化的污泥中分离得到菌株1和菌株2，对4种邻苯二甲酸酯进行生物降解性研究，获得了其降解速率常数、米氏常数和最大速率常数。

Phthalic Acid Esters have been extensive used in industry,and become one of the most widely pollutants in environment.PAEs were detected in most environmental medium such as air,water and sediment nowadays.

由于在工业上的广泛应用，邻苯二甲酸酯类化合物已成为地球上最普遍存在的环境污染物之一，目前在大气、水体、土壤中均可检测到。

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。