Functions of reticulons in plants: What we can learn from animals and yeasts

Reticulons (RTNs) are membrane-spanning proteins sharing a typical domain named reticulon homology domain (RHD). RTN genes have been identified in all eukaryotic organisms examined so far, and the corresponding proteins have been found predominantly associated to the endoplasmic reticulum membranes. In animal and yeast, in which knowledge of the protein family is more advanced, RTNs are involved in numerous cellular processes such as apoptosis, cell division and intracellular trafficking. Up to now, a little attention has been paid to their plant counterparts, i.e., RTNLBs. In this review, we summarize the data available for RTNLB proteins and, using the data obtained with animal and yeast models, several functions for RTNLBs in plant cells are proposed and discussed. Received 01 July 2008; received after revision 08 September 2008; accepted 30 September 2008     

Modeling and Experimental Study of PEM Fuel Cell Transient Response for Automotive Applications

This paper presents an analysis of the dynamic response of a low pressure proton exchange membrane (PEM) fuel cell stack to step changes in load, which are characteristic of automotive fuel cell system applications. The goal is a better understanding of the electrical and electrochemical processes when accounting for the characteristic cell voltage response during transients. The analysis and experiment are based on a low pressure 5 kW proton exchange membrane fuel cell (PEMFC) stack, which is similar to those used in several of Tsinghua's fuel cell buses. The experimental results provide an effective improvement reference for the power train control scheme of the fuel cell buses in Olympic demonstration in Beijing 2008.     

DDVP—盖膜和几种杀线虫剂防治花生根结线虫(Meloidogyne arenaria)病研究

DDVP-盖膜防治花生根结线虫病效果显著,为80％DDVP乳油每亩用量150～300g均有效,防治效果为100％,并能增产20～30％左右,对增加花生根瘤数效果也很明显,和对照相比增加14.36％～57.3％,其他杀线虫剂防治也有效,但增产效果不显著。     

改性PAN铸膜液的热力学条件与膜的结构和性能的关系

本文讨论了聚丙烯腈铸膜液中添加剂的种类及用量,PAN含量和温度,以及PAN-Cell共混液中纤维素含量等因素与膜的形态结构、微孔孔径、孔隙率、膜的截留率和水通量的关系.结果表明,上述诸因素对膜的结构和性能有明显的影响,可通过调节铸膜液的热力学条件,在较大范围内调整膜的结构和性能,为制得适用于多种用途的系列膜奠定基础.     

乙醇-水溶液的渗透蒸发膜分离(英文)

报导一种用于渗透蒸发分离乙醇-水溶液的长寿命复合膜,它是通过在不对称多孔镍基片沉积等离子体聚合物薄层而制成的.根据等离子体聚合条件的不同分离膜可以是乙醇优先透过性的或水优先透过性的,其中等离子体聚吡咯烷膜的水分离系数可达3.7,等离子体聚(N-乙烯基比咯烷酮+甲烷)的乙醇分离系数可达2.7基于多孔镍基片在溶剂中的结构稳定性和等离子体聚合物的交联网络,这种复合分离膜有希望发展成为一种抗溶剂,长寿命的渗透蒸发膜。     

曲马多PVC膜选择性电极的研制

介绍了一种曲马多ＰＶＣ膜电极。该电极以曲马多——四苯硼缔合物为电活性物质，线性范围为４．０＊１０￣（－５）—４．０＊１０￣（－２）ｍｏｌ／Ｌ，检测下限为１．４＊１０￣（－５）ｍｏｌ／Ｌ，斜率为５９．８ｍＶ／ｐｃ。电极在ｐＨ＝３．０－７．０之间对曲马多的回收率为９６．７％，电极被用于曲马多片剂和针剂中曲马多的含量测定，取得了较为满意的结果。     

实用型固定膜光催化氧化装置去除水中苯酚

通过实用型固定膜光催化氧化反应器，进行了水中苯酚的光催化氧化研究，试验表明，与光分解相比，光催化氧化具有氧化程度高，可实现完全矿化的优点，相近条件下固定膜与悬浮型光催化氧化装置的运行结果表明，在本项目研制的实用型固定膜装置中，苯酚的光催化氧化效率高于其在ＴｉＯ２水浊液中的氧化效率。