查询词典 pyrethrum

Biological pesticide pyrethrum 50 per cent of the original drug and aerosol, sprayed the Treasury agents, natural pyrethrum mosquito coils, electric-mosquito coils and other agents of natural Pyrethrum ; Melia azedarach plight of 100 percent neem oil, 37 percent Melia azedarach EC, 0.3 percent Melia azedarach EC.

生物农药有50%除虫菊原药及气雾剂、喷务剂、天然除虫菊蚊香、电热蚊香片等天然除虫菊素制剂；苦楝素100%苦楝原油、37%苦楝乳油、0.3%苦楝乳油。

Objective:To establish a method for determination of total flavonoids and luteolin in Pyrethrum tatsienense.

目的：建立藏药打箭菊中总黄酮及木犀草素的含量测定方法。

Supercritical carbon dioxide was used to extract pyrethrin from pyrethrum flowers.

采用超临界二氧化碳萃取除虫菊花中的有效成分除虫菊酯，设计了一个突然降压的过程，使除虫菊花的细胞壁破碎，减少过程的传质阻力。

Almost all the existent pyrethrum esters are prepared from the pyrethrinI and pyrethrin II almost has never been used.

现有的拟除虫菊酯品种，基本源出于除虫菊酯Ⅰ，而除虫菊酯Ⅱ中的第二菊酸及其酯却几乎未被利用过。

This review may provide a theoretical basis for further research and utilization of pyrethrum in China.

为国内进一步研究开发天然除虫菊提供了理论依据。

In Kenya , co-operatives are responsible for 45% of the GDP and 31% of national savings and deposits. They have 70% of the coffee market, 76% dairy, 90% pyrethrum, and 95% of cotton.

在肯尼亚，合作社对 GDP 的贡献达到45%，承担了31%的国民存款和储蓄，占有咖啡市场的70%，奶产品市场的76%，除虫菊市场的90%，棉花市场的95%。

In addition, a plant known pyrethrum contain pyrethrins, but also can effectively repel mosquitoes.

芦荟也是吸收甲醛的球员，我们可以吸收1％的甲醛在90立方米的空气中。

On the other hand, 3(2)-fluoro-4-methoxyl methyl benzyl alcohol and 3(2)-fluoro-4-methyl benzyl alcohol are mixture and components of pyrethrum esters. Both of them have "mixture fluorine effect " and higher activity, lower drug resistance. As we know, the mixture benzyl alcohol containing fluorine is more easy to be synthesized than the single, so the cost of preparation is lower. We hope to apply it to molecule design of the new agriculture chemical. On the base of molecule design and structure-activity relationship research of pyrethric acid II and mixture of alcohol containing fluorine, we intend to get new pyrethrum ester that have higher activity and lower resistance.

另一方面，混合含氟对甲氧甲基苄醇和混合含氟对甲苄醇都是具有"混合氟效应"的高活性、低抗性的拟除虫菊酯醇组分，由于混合含氟醇的合成要比单一异构体的合成容易，成本较低，本文希望将其应用到新农药的分子设计中，用第二菊酸和一些含氟醇进行分子设计及进一步的构效关系的研究，筛选出一些高活性低抗性的拟除虫菊酯换代新品种。

Natural Insecticidal Pyrethrum CHENG Xuan-Sheng1, ZHAO Ping2, YU Yong3 (1Jiangsu Pesticide Research Institute, Nanjing 210036, China; 2Shenyang Research Institute of Chemical Industry, Shenyang 110021, China; 3Shengyang BMD Chemical Company, Shenyang 110021, China) Abstract: This paper reviews research pertaining to natural insecticidal pyrethrum, including the active ingredient in the pyrethrum flower, manufacture, formulation, toxicity, and research on control of agriculturally important insect pests.

天然除虫菊程暄生1，赵平2，于涌3 (1江苏省农药研究所，南京210036；2沈阳化工研究院，沈阳 110021；3沈阳博美达化学有限公司，沈阳110021)摘要综述了天然除虫菊的相关研究，包括除虫菊花的杀虫活性成分、制剂与加工、毒性及在农业害虫防治方面的研究。

On the other hand, 3(2)-fluoro-4-methoxyl methyl benzyl alcohol and 3(2)-fluoro-4-methyl benzyl alcohol are mixture and components of pyrethrum esters. Both of them have "mixture fluorine effect " and higher activity, lower drug resistance. As we know, the mixture benzyl alcohol containing fluorine is more easy to be synthesized than the single, so the cost of preparation is lower. We hope to apply it to molecule design of the new agriculture chemical. On the base of molecule design and structure-activity relationship research of pyrethric acid II and mixture of alcohol containing fluorine, we intend to get new pyrethrum ester that have higher activity and lower resistance.

另一方面，混合含氟对甲氧甲基苄醇和混合含氟对甲苄醇都是具有&混合氟效应&的高活性、低抗性的拟除虫菊酯醇组分，由于混合含氟醇的合成要比单一异构体的合成容易，成本较低，本文希望将其应用到新农药的分子设计中，用第二菊酸和一些含氟醇进行分子设计及进一步的构效关系的研究，筛选出一些高活性低抗性的拟除虫菊酯换代新品种。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失