除草

The total extract and extracts by three solvent did not show any bioactivity against seed germination of Amaranthus retroflexus at a concentration of 12.5 mg/ml.

室内除草活性测定结果表明，总浸膏及各萃取段在浓度为12.5mg/ml时对反枝苋种子萌发、幼根和幼茎生长无明显抑制作用。

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。

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。

In the forth chapter, the mechanism of pyrimidine benzylamine compounds is studied by the conventional bioassay and biochemical methods based on probe compound 104-4. The results presented here indicated that the addition of 5 mg/L of 3 branched-amino acids to sorghum seedling cultures incubated in the presence of 104-4 completely alleviated herbicide-induced stem growth inhibition, but each of Val, Ile and Leu single is only partly effective in reversing 104-4-induced growth inhibition at the same concentrations.

通过先导结构优化策略的实施，筛选出15个高除草活性的4，6-二甲氧基-2-取代嘧啶苄胺类候选化合物，在此基础上，对一些候选化合物进行作物安全性评价试验，实验结果提示化合物103-1和化合物105-3在低剂量下对某些作物有良好的选择性，可作为优选化合物进入田间小区试验。

Bromacil was synthesized using 2-bromobutane and urea as the starting materials in three steps including condensation,cyclization and bromination with total yield of 61%.

以2-溴丁烷和尿素作为起始原料，经缩合、环化、溴代三步反应得到除草定，总收率为61%。

Use: The solvent, colored cinefilm develop pharmaceutical to use as reeling off raw silk from cocoons with polyacrylonitrile fiber, chemical analysis reagent, make plant take off leaf pharmaceutical and herbicide that weed, and rubber industry make rubber deal with pharmaceutical, electroplate industry formulate, plate nickel electroplate liquid.

用作聚丙烯腈纤维抽丝溶剂、彩色电影胶片冲洗剂，化学分析试剂，制造植物脱叶剂和除草的除莠剂，以及橡胶工业作橡胶处理剂、电镀工业配制镀镍电镀液。

As long as a hand trowel was the only option, weeding a lawn had been considered more or less hopeless, and most guides advised against even trying. A lawn "thickly starred with the glowing yellow blossoms" of dandelions "isn't in itself a bad picture," the journal Country Life in America observed consolingly.

在用手除草是唯一选择的年代，铲除一片草坪的杂草被认为是无望的，大部分指南都会劝告不要尝试（草坪&星星点点地点缀着黄色的蒲公英小花朵并不算不好看&《美国乡村生活》杂志安慰性地评论道）。

Methods Five different ultraviolet absorption components were isolated from the filtrate of Botrytis cinerea isolate 7–3 culture. Of the five components, one showed strong inhibitory to Digitaria sanguinalis.

在前期薄层层析法、柱层析法和高效液相色谱法分析的基础上对灰葡萄孢诱变菌株BC7–3的代谢产物中具有除草活性的5个不同组分分别进行了液相色谱制备。

Especially,compound 4b showed a good bactericidal activity with certain strains(such as Fusarium oxysporum and Dothiorella gregaria),and in this aspect,it can comparable to the commercialized fungicide triadimefon.

杀菌和除草测试结果表明，部分目标化合物显示良好的杀菌活性，尤其是化合物4b对某些菌种的抑制活性和三唑酮相当，其对苹果轮纹的抑制作用超过了三唑酮。4。

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。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。