Molecular cloning and sequence analysis of the gene encoding interleukin‐6 of the giant panda (Ailuropoda melanoleuca)

In the present study, the cloning and sequence analysis of interleukin‐6 (IL‐6) from the giant panda (Ailuropoda melanoleuca) were described. Sequencing revealed that IL‐6 complementary DNA contains a 636 base‐pair open reading frame encoding 211 amino acids. Homology analyses indicated that the identity levels of nucleotide and deduced amino acid sequences of IL‐6 between the giant panda and other species in Carnivora ranged from 90.5% to 85.6% and from 82.9% to 76.5%, respectively. Phylogenetic analyses based on nucleotide and amino acid sequences showed that the harbour seal shared a closer relationship with the giant panda than other carnivores (ursids not included). The functionally important domains and sites that have previously been recognized in other carnivores were all observed in the IL‐6 sequence of the giant panda. These findings suggest that the complementary DNA fragment cloned is indeed the IL‐6 molecule with biological activity and can be used in immunological studies of the giant panda.     

多媒体计算机常见故障分析

随着多媒体计算机的逐步增多,自然会出现一些故障,本文分析了常见故障并给出了解决办法     

平行双光透电极吸收光谱电化学的研究

推道了工作电极为多个相互平行的光透电极时,大幅度电位阶跃和线性电位扫描扰动下可逆电极过程的光谱电化学响应方程,理论上得到了５＊１０＾－３ｍｏｌ／ＬＫ４Ｆｅ（ＣＮ）６＋０．５ｍｏｌ／ＬＫＣｌ水溶液体系双光透电极光谱电化学实验的支持。,表明采用多光透电极为工作电极是提高光谱电化学 灵敏度的可能途径。     

网络新脉搏IPv6

本文对比IPv4论述了新的网络协议IPv6的基本特点、基本实现技术以及IPv6目前发展应用状况和中国IPv6的前景展望。     

The susceptibility to exercise-induced muscle damage increases as rats grow larger

Summary Glucose-6-phosphate dehydrogenase and N-acetyl--glucosaminidase activities were both elevated after eccentric exercise indicating that this type of exercise causes muscle damage. Muscle damage as measured by glucose-6-phosphate dehydrogenase activity in the vastus intermedius was greater and occurred later in larger rats indicating that the susceptibility to muscle damage is increased and the repair process delayed in older and larger animals.     

IPv4与IPv6协议性能比较浅谈

Internet的飞速发展,是设计者始料不及的.目前IPv4协议的局限性已严重制约了Internet的健康发展.IPv6则针对IPv4的不足,采用独特的技术解决了IPv4在地址短缺、网络速度和安全性方面的问题.对两种协议的网络速度和安全性能进行对比分析.     

欧盟第六个框架计划的经费管理及启示

欧盟第六个框架计划是世界上规模最大的多国科技合作计划。为了更好地达到其目标。欧盟委员会制定了完善的经费管理办法。本文介绍了欧盟第六个框架计划的支付方式、支付方式与项目类型的关系、资助金额(比例)与活动类型(研究活动、示范活动以及管理活动)的关系以及可采用的三种成本模式，并且提出了对我国科技计划经费管理的启示。     

杂交茄子新品种“呼茄6号”的选育与试验

呼茄6号是以79B01-2-2-2为母本，9105-1-1-3为父本配制的一代杂种。该品种中早熟，始花节住7-8节果实长卵圆形，果皮黑色，光泽度好，耐弱光，果肉松软，味甜，口感极好。平均单果重量80g左右，露地每667m^2产量4400kg左右。适宜保护地和露地栽培。     

Cs_2NaPrCl_6:Pr~(3+)离子谱的晶场分析

本文对 C s_2NaPrCl_6类型的含 Pr~(3+)的稀土络合物,在较接近实际对称 C(4h)近似下,用配位场方法研究了它们的能谱,所得结果与光谱实验值符合较好.     

尼龙48的Brill转变

采用变温X射线衍射和DSC-XRD同时测定的方法,研究尼龙48在升温和降温过程中发生的Brill转变现象.根据DSC-XRD同时测定的结果,提出了尼龙48的Brill转变的分子机理.研究结果表明,尼龙48与尼龙66一样,加热时,由室温下的三斜晶型(α)转变为高温下的假六方晶型(β);冷却时,β晶型转变成α晶型.尼龙48的Brill转变温度(tBrill)是210 ℃.当t＜tBrill时,一种三斜晶型(α1)变成另一种三斜晶型(α2);在t=tBrill时,由于氢键面间层的滑移,瞬间转变成β晶型.