A formulated as △fH m ? (PPDs,g)=a+ΣbiPi + cifi is put forward for estimating standard formation enthalpies of pyridine-derivatives (PDDs), in which,P i is path index andc i f i is an amended term of interac...A formulated as △fH m ? (PPDs,g)=a+ΣbiPi + cifi is put forward for estimating standard formation enthalpies of pyridine-derivatives (PDDs), in which,P i is path index andc i f i is an amended term of interaction between substituent and N atom on pyridine ring. The Calculations based on the model were carried out for some pyridine-derivatives. The values of standard formation enthalpy calculated are consistent with those in literature.展开更多
Using a new perturbative expansion method in Quantum Chromodynamics with a non-perturbative gluon background, the gluon propagator is calculated up to the one-loop level, and renormalized in the modified minimal subtr...Using a new perturbative expansion method in Quantum Chromodynamics with a non-perturbative gluon background, the gluon propagator is calculated up to the one-loop level, and renormalized in the modified minimal subtraction scheme. The resultant renormalization constants of the quantum gluon field and the gauge parameter receive a non-perturbative contribution coming from the gluon condensate <FF> besides the usual perturbative one, respectively.展开更多
The auto industry, in cooperation over the past 23 years, is embracing new changes. Various new forms are finding use there which used to be dominated by introduced technology, brand name or funds.
[ Objective ] The paper was to study the residue dynamics of mancozeb in Capsicum annuum Linn and soil. [ Method ] Field spraying test and indoor analysis were carried out in three places of Changsha, Guangzhou and Be...[ Objective ] The paper was to study the residue dynamics of mancozeb in Capsicum annuum Linn and soil. [ Method ] Field spraying test and indoor analysis were carried out in three places of Changsha, Guangzhou and Beijing City during 2008 -2009 to study the digestion dynamics and the final residue of man- cozeb in C. annuum and soil, and gas chromatography was used for quantitative analysis. [ Result]The average recovery rates of mancozeb in C. annuum and soil were 86.59%-93.03% and 92.57%-95.14%, respectively. Mancozeb had rapid digestion in C. annuum and soft with the half-life of 2.29 -4.65 and 4.01 - 4.65 d, respectively. When metalaxyl-M,mancozeb water dispersible granule was sprayed in C. annuum according to the recommend dose （ spraying for no more than three times with the spraying interval of 5 d）, the final residue of maneozeb in C. annuum collected in the third day after the last spraying was less than 2 mg/kg.展开更多
基金Supported by the National Natural Science Foundation of China!(29971024)
文摘A formulated as △fH m ? (PPDs,g)=a+ΣbiPi + cifi is put forward for estimating standard formation enthalpies of pyridine-derivatives (PDDs), in which,P i is path index andc i f i is an amended term of interaction between substituent and N atom on pyridine ring. The Calculations based on the model were carried out for some pyridine-derivatives. The values of standard formation enthalpy calculated are consistent with those in literature.
文摘Using a new perturbative expansion method in Quantum Chromodynamics with a non-perturbative gluon background, the gluon propagator is calculated up to the one-loop level, and renormalized in the modified minimal subtraction scheme. The resultant renormalization constants of the quantum gluon field and the gauge parameter receive a non-perturbative contribution coming from the gluon condensate <FF> besides the usual perturbative one, respectively.
文摘The auto industry, in cooperation over the past 23 years, is embracing new changes. Various new forms are finding use there which used to be dominated by introduced technology, brand name or funds.
基金Supported by Pesticide Residues Fund of Department of Agriculture (NCR2008036)~~
文摘[ Objective ] The paper was to study the residue dynamics of mancozeb in Capsicum annuum Linn and soil. [ Method ] Field spraying test and indoor analysis were carried out in three places of Changsha, Guangzhou and Beijing City during 2008 -2009 to study the digestion dynamics and the final residue of man- cozeb in C. annuum and soil, and gas chromatography was used for quantitative analysis. [ Result]The average recovery rates of mancozeb in C. annuum and soil were 86.59%-93.03% and 92.57%-95.14%, respectively. Mancozeb had rapid digestion in C. annuum and soft with the half-life of 2.29 -4.65 and 4.01 - 4.65 d, respectively. When metalaxyl-M,mancozeb water dispersible granule was sprayed in C. annuum according to the recommend dose （ spraying for no more than three times with the spraying interval of 5 d）, the final residue of maneozeb in C. annuum collected in the third day after the last spraying was less than 2 mg/kg.
