论文学翻译中译者的地位

随着翻译实践在各个领域的蓬勃发展,文学翻译一直处于经久不衰的主导地位,随着其译论深入探讨,文译界对译者的主观能动性的关注也越来越多,而译者在文学翻译中的地位也从隐形,透明,仆人渐渐的上升到了欲与作者一比高的地步。     

Asymmetry of the water flux induced by the deformation of a nanotube

The behavior of nano-confined water is expected to be fundamentally different from the behavior of bulk water.At the nanoscale,it is still unclear whether water flows more easily along the convergent direction or the divergent one,and whether a hourglass shape is more convenient than a funnel shape for water molecules to pass through a nanotube.Here,we present an approach to explore these questions by changing the deformation position of a carbon nanotube.The results of our molecular dynamics simulation indicate that the water flux through the nanotube changes significantly when the deformation position moves away from the middle region of the tube.Different from the macroscopic level,we find water flux asymmetry(water flows more easily along the convergent direction than along the divergent one),which plays a key role in a nano water pump driven by a ratchet-like mechanism.We explore the mechanism and calculate the water flux by means of the Fokker-Planck equation and find that our theoretical results are well consistent with the simulation results.Furthermore,the simulation results demonstrate that the effect of deformation location on the water flux will be reduced when the diameter of the nanochannel increases.These findings are helpful for devising water transporters or filters based on carbon nanotubes and understanding the molecular mechanism of biological channels.     

条形纳米通道中奇特的钠选择性

运用分子动力学模拟研究了Na+和K+在4种不同宽度的条形纳米通道中的输运行为,发现由2块单层石墨片构成的条形纳米通道具有一定的钠选择性.当条形纳米通道宽度为0.88 nm时,钠钾离子(Na+/K+)的通透率之比可达到6.但当条形纳米通道的宽度增大时,选择性会逐渐减弱.由于这种管道的结构简单而且能实现很好的离子选择功能,因此在离子分离、海水淡化中有很大的潜在应用.     

周期性外力驱动甘油分子通过膜通道的机制

采用Fokker-Planck方程研究了甘油分子在周期性外力作用下通过甘油通道（glycerol protein ficilitator，GlpF）定向输运的问题．根据平均力势（potential of mean force，PMF）的分布把GlpF分成14个区域，分别讨论了不同区域对甘油分子定向输运的影响．研究发现，GlpF的中间区域对甘油分子的输运起到关键作用．     

DNA双链断裂损伤焦点的定量计算和分析方法研究进展

细胞核在各种原因的影响下形成的病灶数是衡量细胞DNA双链断裂损伤的公认指标.如何准确进行细胞核聚焦计数和分析焦点的相关特征与DSBs的关系仍是国内外学界研究的热点,目前应用较广泛的算法偏重于自动化和智能化.文章就DNA双链断裂损伤焦点的定量计算和分析方法的研究进展,从不同算法工具的特点和比较及算法应用过程中相关问题的解决等方面进行了阐述,为正确选择算法工具进行DNA损伤病灶数的量化提供参考意见.     

环境内分泌干扰物与致病研究进展

环境内分泌干扰物逐渐引起人们关注,导致生命质量下降威胁着人群健康.人类不可避免地暴露在环境污染物中,这些污染物具有非直接性干预机体生长和功能的作用.研究证实环境内分泌干扰物对生殖系统有不良影响,许多破坏性活动都与雌激素、雄激素和甲状腺激素作用有关.近年发现环境内分泌干扰物的存在对其他疾病(如糖尿病,甲状腺、大脑发育或功...