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- Keywords persimmon;pyrethrins residuces;gas chromatography; 柿子;菊酯农药残留;气相色谱法;
- pyrethrins residuces 菊酯农药残留
- It is mainly pyrethrin (pyrethroid) with 50 percent in the insecticides. 它们多属拟除虫菊酯类农药,占总数的50%25;
- A synthetic clear or amber - colored viscous insecticide, C19H26O3, similar to pyrethrin. 丙烯除虫菊酯一种合成的透明或琥珀色粘性杀虫剂,C19H26O3,与除虫菊酯相似
- A synthetic clear or amber-colored viscous insecticide, C19H26O3, similar to pyrethrin. 丙烯除虫菊酯一种合成的透明或琥珀色粘性杀虫剂,c19h26o3,与除虫菊酯相似
- A synthetic clear or amber - colored viscous insecticide,C19H26O3,similar to pyrethrin. 为了纪念结婚三周年,马克给妻子买了一条琥珀项链。
- A good economic benefit can be brou ght about by using anaerobic digestive residuc for feeding pig , chicken, cattle sheep, fish and earthworm and so on. 利用厌氧消化残留物养殖猪、鸡、牛、羊、鱼、蚯蚓等,效果好,并能获得较好的经济效益。
- A method for the determination of six pyrethrins from natural pyrethrum extracts by capillary gas chromatography with FID detector was described. 研究了毛细管气相色谱法定量分析天然除虫菊提取液中6种酯的方法,FID检测,邻苯二甲酸二丁酯作为内标物。
- As pyrethrins insecticides were overused to control the insects in the cotton fields,effects on pink bollworm decreased rapidly.However,methylparathion was still effective. 由于防治棉铃虫、棉红铃虫过量使用菊酯类农药,溴氰菊酯等菊酯类杀虫剂防治红铃虫的田间效果近年呈迅速下降的趋势,而甲基对硫磷对红铃虫仍然有效。
- Consisting of enhanced Pyrethrins, it can control the reproduction of flea, lice and tick effectively. Protein and lanolin can solve dermatitis problems and itchy skin. 加倍除虫菊能起杀蚤作用,羊脂蛋白有助舒缓皮肤炎症状及止痒。
- So applying methylparathion properly and developing other insecticides instead of pyrethrins insecticides should be served as the main management methods in chemical control. 适当使用甲基对硫磷或开发其它杀虫剂替代菊酯类农药应作为防治红铃虫的主要对策。
- Pyrethrin is a leader, the future will be the coverage of debugging, weeding, sterilization of the three series of integrated pesticide companies. 公司是除虫菊酯的龙头,未来将成为覆盖除虫、除草、杀菌三大系列的综合性农药公司。
- Abstract: In the conventional analysis of pyrethrin residues,the extractions are treated for purification by method of abstraction for many times. 中文摘要: 报道了一种蔬菜拟除虫菊酯类农药残留量的简便分析法。
- Natural pyrethrins are a mixture of six active compounds, and because of the similarity of their structure, it's very difficult to be separated and purified. 摘要天然除虫菊酯含有6种有效成分,但结构相似,分离困难。
- The paper made out the nano-microcapsule theca,by selecting admixture of houttynia cordata thunb extract liquid and pyrethrin as core material,epoxy resin as wall material. 确定了用该微胶囊采用浸轧法对毛织物进行抗菌防蛀后整理的工艺。
- Extracted pyrethrins from pyrethrum dried flower by super critical CO2 .is a paste called oleoresin which isn't suitable to formulate insecticidal products either use in household or crops. 用超临界CO2从除虫菊干花中萃取的除虫菊素,这种膏状物不能直接用来加工或深加工杀虫产品。
- We optimized the conditions of reversed phase high performance liquid chromatography(HPLC),and separated and purified the six compounds by reversed phase HPLC from the pyrethrins oil. 本研究以除虫菊酯精油为原料,通过优化反相高效液相色谱分离条件,分离纯化了除虫菊酯6种有效成分,纯度均达到99%25。
- Application of pyrethrin for controlling insects 拟除虫菊酯在卫生害虫防治中的应用
- Pyrethrin with piperonyl butoxide 除虫菊酯-胡椒基丁醚
- Keywords Pyrethrins;Substantia nigra;Corpus striatum;Dopamine; 关键词除虫菊酯类;黑质;纹状体;多巴胺;