查询词典 herbicidal

The fitting culture conditions for isolate BC4 producing more toxin were Improvement Fries and Czapek-Doxbiotion culture medium , culture time for thirty-five days, pH for 6, culture temperature for 25 , still cultivation, and that the juice of tomato and pepper cannot improve herbicidal activity on Amaranthus retroflexus.

试验确定了菌株BC4代谢产物中除草活性物质产生的适宜条件：即改良Fries培养基和查氏-道氏培养基：培养时间是35d；pH值为6；培养温度为25℃；静止培养；培养基中添加一定比例的番茄、辣椒的浸出汁并未提高灰葡萄孢代谢产物的除草活性。

These studies indicate the rationality of our molecular design based on the crystal structure of KARI complex. To obtain more KARI inhibitors with high activities, the molecular docking and 3D-QSAR methods were applied to our further studying of these amidine compounds. Two methods AutoDock3. 0.3 and DOCK4. 0 were used in molecular docking, and the calculate results accord with that of herbicidal tests in general. The CoMFA model from 3D-QSAR analysis provided useful guidance for designing highly active compounds prior to their synthesis.

这些分子作为潜在的KARI抑制剂为基于KARI的农药分子设计提供了有利指导；对部分小分子进行了合成，在除草活性初筛的近三十个化合物中，个别化合物表现出较好的除草活性，其中一个化合物wb1596对油菜和稗草具有较高的生长抑制率，并通过E.coli KARI酶活性抑制试验验证了其KARI酶的作用靶标，此化合物可以作为KARI一个有苗头的抑制剂为后续工作奠定了基础；对发现的有苗头的KARI抑制剂进行了结构修饰和优化，合成了一系列脒类化合物并确证了它们的结构，改造后的化合物与原抑制剂相比大多除草活性相当或更佳，从而表明我们基于靶标结构的分子设计的合理可靠性；对所合成一系列脒类化合物进行了分子对接和三维定量构效关系研究。

In summary, 4, 6-dimethoxy-2-substituted pyrimidine benzylamine is chosen as a lead compound based on the possibility of synthesis, optimization, and the herbicidal activity.

考虑到合成的可行性、分子结构的可修饰性和除草活性的大小，确定4，6-二甲氧基-2-取代嘧啶苄胺类化合物为除草剂的先导结构。

In summary, 15 new N--2-(4, 6-dimethoxypyrimidin-2-yl-oxy)benzylamine derivatives with high herbicidal activity are obtained.

4氧桥双取代嘧啶苄胺类化合物也是一类具有高除草活性的化合物，在75 g ai／hm~2低剂量下，化合物主要表现出芽后除草活性。

The good herbicidal activity can not be observed at low dosage of 75 g ai/hm~2 for N-(mono-ester substituted phenyl)-2-(4, 6-dimethoxy-pyrimidin-2-yloxy)benzylamine derivatives in post-emergent and pre-emergent application.

主要研究结果如下：(1)氧桥单取代卤素嘧啶苄胺类化合物是一类具有高除草活性的化合物，在75 g ai／hm~2低剂量下，一些化合物表现出良好的芽后和芽前除草活性。

The high post-emergent and pre-emergent herbicidal activity at low dosage of 75 g ai/hm~2 can be found for some N-(mono-substituted phenyl)-2-(4, 6-dimethoxypyrimidin-2-yloxy)benzylamine derivatives.

2氧桥单取代羧酸酯嘧啶苄胺类化合物在75 g ai／hm~2低剂量下，芽后和芽前除草活性不高。

It is Concluded that the mode of action of pyrimidine benzylamine differs from the other typically commercial ALS inhibitors, such as sulfonylurea and pyrimidine salicylic acid herbicides. Its herbicidal activity is activated by the metabolic processes in the plants.

离体条件下，化合物104-4 IC_(50)＞100 mg／L，而除草剂双草醚IC_(50)值为10~(-5)～10~(-4)mg／L，说明化合物104-4对离体ALS没有抑制作用；活体条件下，化合物104-4对ALS有一定的抑制作用，且随着处理时间的延长，酶活力降低，对ALS的抑制作用增加。

Hebei University of Technology, TianJin 300130, China Abstract: Chromobacerium pathogens S-4 with herbicidal activity was screened from rhizosphere of Digitaria sanguinalis using the glutamine synthetase inhibitor. The condition of S-4 in liquid fermentation was studied.

河北工业大学化工学院，天津 300130 摘要：采用谷氨酰胺合成酶抑制剂模型从马唐根际土壤中分离出一株马唐致病菌S-4，经鉴定为色杆菌属，对马唐抑制效果较好。

The biological activities of partial imidazolones were studied. The results showed that they did not exhibit obviously herbicidal activity but fungicidal activity.

研究了部分咪唑啉酮化合物的生物活性，结果表明此类化合物均未表现出明显的除草活性，但表现出抑菌活性。

These potential structures provide information for further design of new targeted KARI herbicidal molecules.

基于靶标结构的药物设计方法是先导药物设计的重要手段。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了