Three synthetic peptides representing distinct antigenic epitopes from three genomic regions of hepatitis E virus (HEV) were used to develop enzyme-linked immunoserbent assay ELISA for detecting antibodies to HEV. Bot...Three synthetic peptides representing distinct antigenic epitopes from three genomic regions of hepatitis E virus (HEV) were used to develop enzyme-linked immunoserbent assay ELISA for detecting antibodies to HEV. Both IgG and IgM antibodies to HEV were d展开更多
A study was conducted to evaluate the genotoxicity, if any, of the permitted synthetic food colorants used in India. Eight synthetic food colorants namely Erythrosine （E 127）, Tartrazine （E 102）, Ponceau 4R （E 12...A study was conducted to evaluate the genotoxicity, if any, of the permitted synthetic food colorants used in India. Eight synthetic food colorants namely Erythrosine （E 127）, Tartrazine （E 102）, Ponceau 4R （E 124）, Sunset Yellow FCF （E 110）, Brilliant Blue FCF （E133）, Fast Green FCF （E143）, Carmoisine （E122） and Indigo Carmine （E132） and their combination are used in sweets namely Ladu, Jilebi and Halwa in Calicut and suburban areas of Kerala, in India. The genotoxicity of the colorants alone and in combinations at different concentrations were evaluated by Cytokinesis Block Micronucleus （CBMN） Assay. It was observed that all the above colorants and their combinations could cause genotoxicity to human lymphocytes even at the permissible concentration of 100 ppm as per PFA （Prevention of Food Adulteration） Act of India. The toxicity varied from dye to dye and was proportional to their concentration. Combination of colors showed more toxicity than the individual components. Toxicity could be reduced drastically by reducing the concentration of the dyes at least 50% below the permissible limit. Permitted synthetic food colorants even at the permissible limit should be used with caution. This study demonstrated the need for redefining the permissible limit of the food colorants based on Admissible Daily Intake （ADI） as being practiced in developed countries.展开更多
目的:考察“纤毛持续运动时间体外及体内法”在川芎嗪、冰片上的运用。方法:(1)体外法———取离体蛙上腭黏膜,滴加药液后于40倍光学显微镜下观察黏膜纤毛持续运动时间。再洗净黏膜,观察纤毛摆动是否恢复,并记录从恢复摆动开始至摆动再...目的:考察“纤毛持续运动时间体外及体内法”在川芎嗪、冰片上的运用。方法:(1)体外法———取离体蛙上腭黏膜,滴加药液后于40倍光学显微镜下观察黏膜纤毛持续运动时间。再洗净黏膜,观察纤毛摆动是否恢复,并记录从恢复摆动开始至摆动再次停止所持续的时间。(2)体内法———于青蛙上腭黏膜滴加药液或生理盐水,接触30 m in后洗净,分离上腭黏膜于40倍光学显微镜下观察黏膜纤毛持续运动时间。结果:川芎嗪离体法及在体法的纤毛持续运动时间相对百分率分别为9.8%、87.3%;冰片离体法及在体法的纤毛持续运动时间相对百分率分别为9.3%、89.5%。结论:纤毛持续运动时间体外及体内法均可以作为中药鼻黏膜毒性筛选方法之一,并各有利弊。川芎嗪、冰片对体外纤毛持续运动时间有显著的毒性影响。展开更多
文摘Three synthetic peptides representing distinct antigenic epitopes from three genomic regions of hepatitis E virus (HEV) were used to develop enzyme-linked immunoserbent assay ELISA for detecting antibodies to HEV. Both IgG and IgM antibodies to HEV were d
文摘A study was conducted to evaluate the genotoxicity, if any, of the permitted synthetic food colorants used in India. Eight synthetic food colorants namely Erythrosine （E 127）, Tartrazine （E 102）, Ponceau 4R （E 124）, Sunset Yellow FCF （E 110）, Brilliant Blue FCF （E133）, Fast Green FCF （E143）, Carmoisine （E122） and Indigo Carmine （E132） and their combination are used in sweets namely Ladu, Jilebi and Halwa in Calicut and suburban areas of Kerala, in India. The genotoxicity of the colorants alone and in combinations at different concentrations were evaluated by Cytokinesis Block Micronucleus （CBMN） Assay. It was observed that all the above colorants and their combinations could cause genotoxicity to human lymphocytes even at the permissible concentration of 100 ppm as per PFA （Prevention of Food Adulteration） Act of India. The toxicity varied from dye to dye and was proportional to their concentration. Combination of colors showed more toxicity than the individual components. Toxicity could be reduced drastically by reducing the concentration of the dyes at least 50% below the permissible limit. Permitted synthetic food colorants even at the permissible limit should be used with caution. This study demonstrated the need for redefining the permissible limit of the food colorants based on Admissible Daily Intake （ADI） as being practiced in developed countries.
文摘目的:考察“纤毛持续运动时间体外及体内法”在川芎嗪、冰片上的运用。方法:(1)体外法———取离体蛙上腭黏膜,滴加药液后于40倍光学显微镜下观察黏膜纤毛持续运动时间。再洗净黏膜,观察纤毛摆动是否恢复,并记录从恢复摆动开始至摆动再次停止所持续的时间。(2)体内法———于青蛙上腭黏膜滴加药液或生理盐水,接触30 m in后洗净,分离上腭黏膜于40倍光学显微镜下观察黏膜纤毛持续运动时间。结果:川芎嗪离体法及在体法的纤毛持续运动时间相对百分率分别为9.8%、87.3%;冰片离体法及在体法的纤毛持续运动时间相对百分率分别为9.3%、89.5%。结论:纤毛持续运动时间体外及体内法均可以作为中药鼻黏膜毒性筛选方法之一,并各有利弊。川芎嗪、冰片对体外纤毛持续运动时间有显著的毒性影响。
