剁手党a shopaholic一年一度的“双十一”“双十二”是属于“剁手党”的狂欢节。“剁手党”就是指控制不住购买欲,想把手“剁掉”的一群人。英文中“剁手党”可以用a shopaholic来表示。如:She is a shopaholic in the best possible ta...剁手党a shopaholic一年一度的“双十一”“双十二”是属于“剁手党”的狂欢节。“剁手党”就是指控制不住购买欲,想把手“剁掉”的一群人。英文中“剁手党”可以用a shopaholic来表示。如:She is a shopaholic in the best possible taste.她或许是个有着最好品位的“剁手党”。展开更多
The phase behaviors of the complex formed by didodecyldimethylammonium bromide（DDAB）and cetyltrimethylammonium bromide（CTAB）interacting with three different types of DNAs,salmon testes DNA（~2000 bp）,21-bp double...The phase behaviors of the complex formed by didodecyldimethylammonium bromide（DDAB）and cetyltrimethylammonium bromide（CTAB）interacting with three different types of DNAs,salmon testes DNA（~2000 bp）,21-bp double-stranded oligonucleotides（oligo-ds DNA）,and 21-nt single-stranded oligonucleotides（oligo-ss DNA）were studied by synchrotron small-angle X-ray scattering.It was found that the DNA length and flexibility,together with the positive/negative charge ratio,determined the final structure.At higher charge ratios,the DNA length exhibited negligible effect.Both oligo-ds DNA and salmon DNA formed inverted hexagonal packing of cylinders with CTAB,as well as bilayered lamella with DDAB.However,at lower charge ratios,oligo-ds DNA formed a distorted hexagonal phase with CTAB and a new structure with DDAB,which was different from the behaviors of salmon DNA.The flexible oligo-ss DNA formed rich structures that were subject to environmental disturbance.Kinetic study also indicated that the structures of the complex formed by oligo-ss DNA took much longer to mature than the structures formed by oligo-ds DNA.We attributed this result to the conformational adjustment of oligo-ss DNA in the complex.展开更多
文摘剁手党a shopaholic一年一度的“双十一”“双十二”是属于“剁手党”的狂欢节。“剁手党”就是指控制不住购买欲,想把手“剁掉”的一群人。英文中“剁手党”可以用a shopaholic来表示。如:She is a shopaholic in the best possible taste.她或许是个有着最好品位的“剁手党”。
基金financially supported by the National Natural Science Foundation of China(21174007)the National Basic Research Program of China(2012CB821500)
文摘The phase behaviors of the complex formed by didodecyldimethylammonium bromide（DDAB）and cetyltrimethylammonium bromide（CTAB）interacting with three different types of DNAs,salmon testes DNA（~2000 bp）,21-bp double-stranded oligonucleotides（oligo-ds DNA）,and 21-nt single-stranded oligonucleotides（oligo-ss DNA）were studied by synchrotron small-angle X-ray scattering.It was found that the DNA length and flexibility,together with the positive/negative charge ratio,determined the final structure.At higher charge ratios,the DNA length exhibited negligible effect.Both oligo-ds DNA and salmon DNA formed inverted hexagonal packing of cylinders with CTAB,as well as bilayered lamella with DDAB.However,at lower charge ratios,oligo-ds DNA formed a distorted hexagonal phase with CTAB and a new structure with DDAB,which was different from the behaviors of salmon DNA.The flexible oligo-ss DNA formed rich structures that were subject to environmental disturbance.Kinetic study also indicated that the structures of the complex formed by oligo-ss DNA took much longer to mature than the structures formed by oligo-ds DNA.We attributed this result to the conformational adjustment of oligo-ss DNA in the complex.
