The determination of 7 bactericidals residues,including chlorthalonil,dichlofluanid,tolylfluanid,captan,folpet,captafol and deltamethrin,in foods by using on-line gel permeation chromatography(GPC) coupled with gas ch...The determination of 7 bactericidals residues,including chlorthalonil,dichlofluanid,tolylfluanid,captan,folpet,captafol and deltamethrin,in foods by using on-line gel permeation chromatography(GPC) coupled with gas chromatography-mass spectrometry(GC-MS).Bactericidal residues were extracted with acetonitrile,and cleaned up by ENVI-Crab,LC-NH2 column and GPC,respectively.The analysis of 7 bactericidals residues was performed by GC-MS.The average recoveries of analytes were range of 75%-120% with RSD of 3.5%-10.3%.展开更多
To investigate the expression of antibacterial peptide CecropinB cDNA in dairy goat mammary gland epithelial cells,the CecropinB gene was cloned and was inserted into a eukaryotic vector pECFP-C1 to construct the reco...To investigate the expression of antibacterial peptide CecropinB cDNA in dairy goat mammary gland epithelial cells,the CecropinB gene was cloned and was inserted into a eukaryotic vector pECFP-C1 to construct the recombinant plasmid pECFP-B by genetic engineering technique.Recombinant plasmid pECFP-B was transfected into dairy goat mammary gland epithelial to detect the bactericidal activity of CecropinB.The expression of CecropinB was also detected.The result of RT-PCR demonstrated CecropinB gene was expressed in transfected cells.CecropinB recombinant plasmid DNA was injected into udders and CecropinB was expressed in mammary gland,exhibiting bactericidal activity to Staphylococcus aureus in vivo experiments.展开更多
文摘The determination of 7 bactericidals residues,including chlorthalonil,dichlofluanid,tolylfluanid,captan,folpet,captafol and deltamethrin,in foods by using on-line gel permeation chromatography(GPC) coupled with gas chromatography-mass spectrometry(GC-MS).Bactericidal residues were extracted with acetonitrile,and cleaned up by ENVI-Crab,LC-NH2 column and GPC,respectively.The analysis of 7 bactericidals residues was performed by GC-MS.The average recoveries of analytes were range of 75%-120% with RSD of 3.5%-10.3%.
基金Supported by Key Teachers Foundation of Education Office of Heilongjiang Province,2005(1055G005)
文摘To investigate the expression of antibacterial peptide CecropinB cDNA in dairy goat mammary gland epithelial cells,the CecropinB gene was cloned and was inserted into a eukaryotic vector pECFP-C1 to construct the recombinant plasmid pECFP-B by genetic engineering technique.Recombinant plasmid pECFP-B was transfected into dairy goat mammary gland epithelial to detect the bactericidal activity of CecropinB.The expression of CecropinB was also detected.The result of RT-PCR demonstrated CecropinB gene was expressed in transfected cells.CecropinB recombinant plasmid DNA was injected into udders and CecropinB was expressed in mammary gland,exhibiting bactericidal activity to Staphylococcus aureus in vivo experiments.
