作物盐胁迫响应蛋白质组学研究

综述了近年来作物响应盐分胁迫蛋白质组学的研究进展．     

Divisional and hierarchical innervations of G. gecko’s toes to motion and reception

As a member of robot families, climbing robots have become one of the research hot-spots in the robotic field recently and Gekko gecko （G. gecko） has been broadly seen as an ideal model for climbing robot development. But for gecko-mimic robots, one of the key problems is how to design the robot＇s foot. In this paper, （1） high-speed camera recording and electrophysiological method are used to observe motion patterns of G. gecko＇s foot when it climbs on different oriented surfaces; （2） nerve innervations of gecko＇s toes to motion and reception are studied. It is found that the five toes of the G. gecko can be divided into two motion and reception divisions, and also its motion and reception are modulated and controlled hierarchically. The results provide important information and exclusive ideas for the foot design and control algorithm of gecko-mimic robots.     

Evidence of vacuolar compartmentalization of arsenic in the hyperaccumulator Pteris vittata

Pteris vittata can hyperaccumulate arsenic （As） to 〉1% of its dry weight without showing any signs of toxicity, indicating the existence of effective plant-internal detoxificaUon mechanisms. Although vacuolar compartmentalization is known to play an important role in heavy metal detoxification and tolerance, direct evidence of arsenic compartmentalization in this hyperaccumulator was lacking. Here we report the subcellular localization of As in the callus of P. vittata. The callus induced from gametophytes of P. vittata exposed to 0.2 mmol/L arsenate for 20 days were examined by directly isolating cell walls, protoplasts and vacuoles, and determining arsenic concentrations. Of the total As in the callus, about 94% was in the protoplast, and of that, 91% was present in the vacuoles, indicating that vacuoles are a major storage site for As in P. vittata. In addition, the changes in the chemical components of vacuoles were analyzed by Fourier transform infrared spectroscopy （FTIR）.     

论中医理论中的系统整体性思想

中医理论中蕴含着丰富的系统整体性思想。它不同于西方分析还原论的研究方法,坚持用整体论去分析研究人体疾病：不仅强调人体各个组成部分之间和人体与自然环境之间的系统整体性,而且对疾病进行综合考察,辨证施治,立方用药,进行全身心调节,力求达到整体最佳的目标。中医是系统整体性科学。     

以生态科学为指导 造就多功能、多样性的生态系统

"植树造林,绿化祖国"已初见成效.中国现在拥有世界上最多的人工林,面积已达3379万hm2,占全国森林总面积的31.86%,占世界人工林总面积的1/3.     

东方龙虱鞘翅: 形态学及力学性能研究

研究了东方龙虱鞘翅的拓扑结构及其鞘翅生物材料的力学性能. SEM观测表明鞘翅横向截面和纵向截面结构相同, 是一种具 “桥墩” 状连接的空腔轻质结构, 由致密的黑色外表皮层和其下数十层几丁质纤维层平行、螺旋交织构成的内表皮层组成; 纳米压痕仪测得新鲜鞘翅外侧区域的硬度和弹性模量分别为0.31和6.13 GPa; 拉伸实验得到新鲜鞘翅横向和纵向的强度极限分别为169.2和194.5 MPa; 干燥鞘翅对应的强度极限为85.38和90.91 MPa, 新鲜鞘翅的强度是干燥鞘翅值的2倍; 结果表明甲虫鞘翅是一种力学性能呈现拓扑分布规律的轻质生物复合材料, 该研究为航空航天材料的轻质结构的设计提供了生物学的参考.     

p-HPcZn-SiO_2纳米粒的制备与表征

运用微乳液法制备出β-四(羧基苯氧基)锌酞菁-二氧化硅纳米粒,初步的研究结果表明其在水溶液中纳米粒粒径比较均一,且具有良好的分散性和稳定性.与未包裹酞菁的在水溶液中相比,该纳米粒的单线态氧量子产率得到了明显提高.     

Subtyping of type A influenza by sequencing the variable regions of HA gene specifically amplified with RT-PCR

The outbreak of a novel influenza A （H1N1） virus across the globe poses a threat to human health. It is of paramount importance to develop a rapid, reliable and inexpensive diagnostic procedure. Based on the bioinformatic information from public database, primers specific for influenza A virus surface protein haemagglutinin （HA） of several subtypes （including H1, H2, H3, H5, H7 and H9） were designed. Primer-specific PCR products were subiected to sequencing for accurately distinguishing H1 and H3 subtypes from others. This sequencing-based detection method will not only be applied to rapid detection and simultaneous subtype identification of new influenza A virus H1N1, but also provide the strategies to monitor other new types of influenza virus with explosive potential.     

用于安全局域网络的动态监控器

提出了一种新的局域网安全解决方案——安全局域网。动态监控器是安全局域网中的核心部件。动态监控器对终端的文件访问操作以及局域网中各个实体间的通信行为进行监视,并对这些行为加以不可向上读和不可向下写的强制访问控制规则,防止了秘密信息的非法访问以及通过网络进行的信息泄露。结果表明:该方案可以有效地解决局域网的安全问题。     

超声提取绿茶茶多酚研究

在单因素基础上,通过正交实验,研究超声提取法对绿茶茶多酚提取率的影响,并优选出提取工艺的最佳条件.结果表明,超声波作用15 min提取率为10.710%,而水提浸作用1 h的提取率仅为10.638%,表明超声提取缩短了时间.正交实验的结果给出超声提取的最佳提取工艺为料液比1:45,时间为15 min,功率为480 W.