云南怒江峡谷的蝴蝶资源

报道云南怒江峡谷的蝴蝶共11 科115 属225 种。同时提出改造怒江峡谷为蝴蝶峡谷、开办蝴蝶牧场、发展蝴蝶 贸易、建立科普园地、加强生态环境的恢复和蝶类资源保护等5 点建议。

保护生物学概要

综述了保护生物学的概念、形成、发展、原理内容和方法、保护意义、策略和行动以及我国开展此项工作的情况。图1参41(金显谟)

滇池太湖新银鱼的生长特性与资源量关系的研究

经31个月的连续采样调查,应用Von Bertalanffy生长方程,得到太湖新银鱼1989年和1990年生长方程。据此拟合出体重与种群密度关系W=1.047-0.671 1gC,种群密度与资源量关系F=1999.36C e~(-0.2045C),最终演译出资源量平衡点在1847t。相应体重1.0g/尾;密度指标1.175尾/m~(3);捕捞时间在8月。

Sexual Behavior Modulates Contextual Fear Memory Through Dopamine D1/D5 Receptors

Traumatic events always lead to aversive emotional memory, i.e., fear memory. In contrast, positive events in daily life such as sex experiences seem to reduce aversive memory after aversive events. Thus, we hypothesized that post-traumatic pleasurable ex

生物的分界与前源真核生物界的提出

通过对贾第虫(Giardia)细胞的研究、观察, 发现双滴虫类的细胞核有两个极原始的特征: (1)还没有进化出核仁; (2)核被膜尚不完整。它们在核分裂方面也是极原始的。据此提出可把源真核生物(Archezoa)超界中的源真核生物界划分为两个界, 即以双滴虫门为代表的前源真核生物(Proarchezoa)界和包含目前所知的其他源真核生物的后源真核生物(Metarchezoa)界。

p53蛋白质C端的三维结构及生物功能区

利用p53 C端118个氨基酸的mRNA二级结构和Chou-Fasman蛋白质二级结构预测原则,预测p53蛋白质C端289-325为卷曲肽段,368-393段包括两段螺旋结构:#alpha#_(1)368-373、#alpha#_(2)381-388。其中三段已知的蛋白质二级结构与此mRNA二级结构单元间有准确的对应关系。与四种以多重序列联配为基础的蛋白质二级结构预测方法(准确率均为73.20%左右)相对照,预测结果基本一致。结合单体聚合区31个氨基酸晶体结构,在SGI INDIGO~(2)工作站上构建了p53 C端108个残基的三维结构。进一步揭示了p53 C端诸多生物功能区之间的空间构象关系。

The three dimensional structure and biological domains of the p53 C-terminus.

It was expected that there are a coil (289 similar to 325) and two a helix (alpha(1)368 similar to 373, alpha(2)381 similar to 388) structures in p53 protein C-terminal region based on its mRNA secondary structure template and Chou-Fasman's protein secondary structure principle of prediction. The result was conformed by the other four methods of protein secondary structure prediction that are based on the multiple sequence alignment (accuracy = 73.20%). Combine with the 31 amino acids crystal structure of the oligomerization, the three dimensional conformation of p53 C-terminal 108 residues was built using the SGI INDIGO(2) computer. This structure further expounds the relationship among those biological function domains of p53 C- terminus at three-dimensional level.