除草

Six series of aryloxy pyridazines derivatives have been synthesized starting from 3,6 dichloro pyradizine.

以3,6-二氯哒嗪为原料,合成了6类芳氧基哒嗪类衍生,研究了它们合成方法,并测定了所得草活性。

Life history traits of mictic females in two strains of Brachionus calyciflorus (Rotifera).

草剂草甘膦对萼花臂尾轮虫生活史特征影响。

A method for quantitative analysis of nitrofen in soils and water by RP-HPLC was introduced.

介绍了应用反相高效液相色谱检测水、土壤中草醚方法。

In this paper,the process of synthesizing new model weedicide oryzalin was studied.

本文对新型草剂安磺灵合成工艺进行了研究。

Peasants are busy weeding under the scorching sun.

农民在炎炎烈日下忙着草。

The gardener estimated that it would take him four hours to weed the garden.

丁估计他给花草需要个小时。

Sorption is one of the most important mechanisms deciding Dinoseb transport in soils.

吸附是决定草剂地乐酚在土壤中迁移重要机制之一。

Twelve derivates of S-tetrazine including three of 1,6-dihydro-S-tetrazines prepared recently were screened by pesticide activity.

对12个S嗪衍生,包括3个新合成1,6二氢S嗪衍生,草、杀菌、杀虫活性进行筛选。

Altenusin was reported as myosin light chain kinase inhibitor and sphingomyelinase inhibitor.TAN-420E has antitumor activity.

TAN-420E曾报道有抗肿瘤活性，易氧化为Herbimycin A，后者是很好草剂，并具有一定抗菌活性。

She was on her knees weeding the garden.

她跪着在草。

Tomorrow I have to weed the garden.

我明天得给花草。

It was significant to separate and enrich herbicide picloram from environment sample by molecular imprinting technique.

这对分子印迹技术用于环境样品中草剂青莠定分离和富集具有重要意义。

This herbicide degrades in moist soil.

这种草剂在潮湿土壤中分解。

Some experiments were did on herbicide activity, and had found that activities of some compounds was good,especially 3,6-bis-benzyl-s-tetrazine.

对其中部分化合进行了生活性实验,发现有些化合显示了较好活性,同时发现烷基取代基引入可以提高草活性。

He is busy weeding.

他正忙于草。

He forked the weeds out.

他用耙子草。

In this paper,the contents of herbicide bifenox weredeterminated by the differential UV spectrophotometry at 280nm,and the reference solution was that the 40.

本文采用差示紫外分光光度法，以40．0微克／毫升甲羧草醚己烷液为参比溶液，在波长280纳米处测定其含量。

The sythesis of Monuron herbicide by oxidative-reductive carbonylation of dimethyamine and p-ClC6H4NO2 using selenium as catalyst and organic base as cocatalyst was studied.

研究了以硒为催化剂,有机胺为助催化剂,对氯硝基苯和二甲胺为反应底,经高选择性氧化还原羰基化一步合成灭草隆草剂。

As steric hindrance of the aryl amine decreased and nucleophilicity increased, occurrence of the transfor-mation reaction increased and herbicidal activity of the product decreased.

芳胺空间位阻越小,亲核性越强,副反应越容易发生,草活性越低。

Several non-infectious diseases including the leaf red spot, gummosis, herbicide in jury, typhoon damage and genetic albinism and an unidentified leaf crinkle disease are also described.

此外非病原性病害包括红斑病、流胶病、草剂药害、风害及遗传性白化症等，以及病因不明之尾叶桉皱叶病亦在文内叙述之。