Pesticide safety is an important guarantee for food security.At present,there are many problems in the process of choosing pesticides by farmers,such as low discernment ability and difficulty in retroactive blame,slow...Pesticide safety is an important guarantee for food security.At present,there are many problems in the process of choosing pesticides by farmers,such as low discernment ability and difficulty in retroactive blame,slow replacement of medical equipment,slow promotion of technology assistance,lack of professional knowledge,difficult to grasp the key points of application,improper use of pesticides,large resistance to reducing quantity and increasing efficiency,etc.In order to use pesticides rationally and realize safe production,countermeasures and suggestions on pesticide application are put forward from the aspects of drug development and application,promotion of biopesticides,change of farmers concept and cultivation of new farmers.展开更多
In this paper,a route to the synthesize piperonyl butoxide (PB) [51 03 6] from CPL Oil is reported.This environmentally amicable synthesis of piperonyl butoxide involves the hydrogenation of CPL Oil with Raney Ni W 2 ...In this paper,a route to the synthesize piperonyl butoxide (PB) [51 03 6] from CPL Oil is reported.This environmentally amicable synthesis of piperonyl butoxide involves the hydrogenation of CPL Oil with Raney Ni W 2 as catalyst,the chloromethylation of dihydrosafrole (DHS) [94 58 6],and the etherification of chloromethyldihydrosafrole (CMDHS)[1938 32 5].The Cinnamomum Petrophilum Leaves Oil(CPL Oil) is an essential oil from leaves of a plant of Cinnamomum Petrophilum Nees.Chao.The PB is a synergist for pyrethrin insecticides.Thus,a mixture of 0.982 mol of CMDHS,1.27 moles of butyl carbitol,1.18 moles of NaOH was refluxed for 1.2 houres at 140℃ to give yield 84.4% of PB (purity≥89.5%).The total yield is 81.5% for CPL oil.After the wastewater of etherification was treated,CODCr can be reduced to 12 mg/L,colority can be reduced 46 time,pH can be changed to 8.展开更多
基金Supported by Research Project of Henan Provincial Federation of Social Sciences"Research on the CPC s Adherence to the Spirit of Struggle in the New Era"(SKL-2023-119)Guiding Project for the Research of Humanities and Social Sciences on Integrity Topics of the Henan Provincial Department of Education"Research on the Performance of Improper Winds and Corruption Problems around Teachers and Students and Countermeasures for Rectification"(2023LZZD-24)Special Key Project of Henan University of Science and Technology s Clean Government"The Manifestation and Rectification Measures of Unhealthy Practices and Corruption around Teachers and Students"(2023-HKDLZZD01).
文摘Pesticide safety is an important guarantee for food security.At present,there are many problems in the process of choosing pesticides by farmers,such as low discernment ability and difficulty in retroactive blame,slow replacement of medical equipment,slow promotion of technology assistance,lack of professional knowledge,difficult to grasp the key points of application,improper use of pesticides,large resistance to reducing quantity and increasing efficiency,etc.In order to use pesticides rationally and realize safe production,countermeasures and suggestions on pesticide application are put forward from the aspects of drug development and application,promotion of biopesticides,change of farmers concept and cultivation of new farmers.
文摘In this paper,a route to the synthesize piperonyl butoxide (PB) [51 03 6] from CPL Oil is reported.This environmentally amicable synthesis of piperonyl butoxide involves the hydrogenation of CPL Oil with Raney Ni W 2 as catalyst,the chloromethylation of dihydrosafrole (DHS) [94 58 6],and the etherification of chloromethyldihydrosafrole (CMDHS)[1938 32 5].The Cinnamomum Petrophilum Leaves Oil(CPL Oil) is an essential oil from leaves of a plant of Cinnamomum Petrophilum Nees.Chao.The PB is a synergist for pyrethrin insecticides.Thus,a mixture of 0.982 mol of CMDHS,1.27 moles of butyl carbitol,1.18 moles of NaOH was refluxed for 1.2 houres at 140℃ to give yield 84.4% of PB (purity≥89.5%).The total yield is 81.5% for CPL oil.After the wastewater of etherification was treated,CODCr can be reduced to 12 mg/L,colority can be reduced 46 time,pH can be changed to 8.
