服装、玩偶、生活器具等纺织品越来越多地出现在人们生活中,这其中存在使用了会分解出芳香胺4,4'-二氨基二苯甲烷的偶氮染料的危害,越发引起人们的重视。根据EN ISO 14362-1∶2017,通过加入连二亚硫酸钠还原裂解和不还原裂解的方法...服装、玩偶、生活器具等纺织品越来越多地出现在人们生活中,这其中存在使用了会分解出芳香胺4,4'-二氨基二苯甲烷的偶氮染料的危害,越发引起人们的重视。根据EN ISO 14362-1∶2017,通过加入连二亚硫酸钠还原裂解和不还原裂解的方法,使用安捷伦气相色谱质谱联用仪(GC-MS)和高效液相色谱仪(HPLC)来进一步探讨分析纺织品中4,4'-二氨基二苯甲烷的假阳性结果,并且给出试验结论:样品测得的4,4'-二氨基二苯甲烷并非来自偶氮染料的还原裂解,而是有其他来源。展开更多
A new bimetallic Cu?complex, [(phen)Cu(μ bdmp)Cu(phen)](ClO4)4·2H2O, where phen and bdmp denote 1,10 phenanthroline and 1,1′ bis(nitrilomethylidyne 4,5 diazafluoren) 4,4′ (μ methylene)bisphenyl respectively w...A new bimetallic Cu?complex, [(phen)Cu(μ bdmp)Cu(phen)](ClO4)4·2H2O, where phen and bdmp denote 1,10 phenanthroline and 1,1′ bis(nitrilomethylidyne 4,5 diazafluoren) 4,4′ (μ methylene)bisphenyl respectively was synthesized and its DNA binding behavior was studied by photophysical methods. It has been found that calf thymus DNA could result in significant decrease both in electronic absorption and fluorescent emission of the complex. The fluorescence quenching by ferrocyanide could be reduced to some extent for the complexin presence of DNA. These facts suggest that this dicopper?complex binds to double helix DNA by partial intercalation.展开更多
文摘服装、玩偶、生活器具等纺织品越来越多地出现在人们生活中,这其中存在使用了会分解出芳香胺4,4'-二氨基二苯甲烷的偶氮染料的危害,越发引起人们的重视。根据EN ISO 14362-1∶2017,通过加入连二亚硫酸钠还原裂解和不还原裂解的方法,使用安捷伦气相色谱质谱联用仪(GC-MS)和高效液相色谱仪(HPLC)来进一步探讨分析纺织品中4,4'-二氨基二苯甲烷的假阳性结果,并且给出试验结论:样品测得的4,4'-二氨基二苯甲烷并非来自偶氮染料的还原裂解,而是有其他来源。
文摘A new bimetallic Cu?complex, [(phen)Cu(μ bdmp)Cu(phen)](ClO4)4·2H2O, where phen and bdmp denote 1,10 phenanthroline and 1,1′ bis(nitrilomethylidyne 4,5 diazafluoren) 4,4′ (μ methylene)bisphenyl respectively was synthesized and its DNA binding behavior was studied by photophysical methods. It has been found that calf thymus DNA could result in significant decrease both in electronic absorption and fluorescent emission of the complex. The fluorescence quenching by ferrocyanide could be reduced to some extent for the complexin presence of DNA. These facts suggest that this dicopper?complex binds to double helix DNA by partial intercalation.