揭秘IT白领生存之道：巧妙用面子赚钞票

翻盖手机为什么受欢迎 你知道翻盖手机为什么在东北亚地区尤其是中国流行吗？恐怕很少有人想到,原因之一是与中国人爱面子有关系。     

WEAKENING STRONG BLACK POLITICAL EMPOWERMENT: IMPLICATIONS FROM ATLANTA'S 2009 MAYORAL ELECTION

Atlanta is perhaps the city with the greatest degree of black political empowerment (BPE) in the United States. Yet in 2009 a relatively weak white mayoral candidate nearly won the general and runoff elections over a field of stronger black candidates. Why? Treating Atlanta as a prototypical case, the article examines factors that undermine the capacity of blacks to retain control of mayoralties in strong BPE cities, with an emphasis on disruptions to black electorates, discontent among black citizens, and reinvestment in electoral politics by whites at the local level.     

二酪氨酸层赋予酵母孢子抗氧化活性

酿酒酵母(Saccharomyces cerevisiae)孢子壁是一个多层结构,其最外层为二酪氨酸层,由酚类化合物NN′-二甲酰基二酪氨酸组成。二酪氨酸层是酵母孢子壁独有的结构,在酵母营养细胞的细胞壁中不存在。因为许多细胞酚类化合物能够清除自由基,我们猜测NN′-二甲酰基二酪氨酸可以作为一种抗氧化剂。为了研究孢子的抗氧化性,将营养细胞、野生型孢子和dit1△孢子培养在强氧化剂H_2O_2中,观察现象。本研究发现相对于酵母营养细胞,含有二酪氨酸层的野生型孢子具有抗自由基的能力使孢子具有抗氧化活性,同时二酪氨酸层缺陷型菌株dit1△孢子对自由基敏感。另外,本研究发现NN′-二甲酰基二酪氨酸能够清除自由基。因此,NN′-二甲酰基二酪氨酸可在未来用作一种新型的抗氧化材料。     

HERMANN EBBINGHAUS.

ASSESSES EBBINGHAUS' INFLUENCE ON THE EXPERIMENTAL STUDY OF VERBAL LEARNING AND MEMORY. (22 REF.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)