排序方式: 共有8条查询结果,搜索用时 93 毫秒
1
1.
2.
世界上的大江大河众多,但分布其中的淡水鲸类动物仅4种,它们是分布于南美洲亚马孙河和奥利诺科河水系的亚河豚;分别分布于印度次大 相似文献
3.
概述了广东海洋药业的现状及发展海洋药业的有利条件,提出了人工培养“新药源”的设想来加快发展广东海洋药业,迎接知识经济的挑战;最后提出几点建议,供决策者参考。 相似文献
4.
5.
6.
AmpLifications with 300 10-base primers under predetermined optimal reaction yielded 2762 reproducible amplified fragments ranging from 200 to 3000 bp. Genetic distances among five species of Takifugu and Lagocephalus spadiceus as outgreup were calculated based on the presence/absence of the amplified fragments. Topological phylogenie trees of the 5 species of Takgfugu and the outgroup were gen-erated by Parsimony and Neighbor-Joining analysis based on RAPD data set. The genetic distance between T. rubripes and T. pseudommus was almost the same as that between individuals within each species, but was much smaller than that among T. rubripes, T. pseudommus and the other species. The molecu-lar data from RAPD analysis convincingly showed that T. rubripes and T. pseudommus should be the same species. 相似文献
7.
河豚毒素及其微生物起源 总被引:15,自引:0,他引:15
河豚毒素是一种强毒性海洋生物活性物质,最初是从豚科鱼中发现,故1909年被Tahara命名为Tetrodotoxin.本文介绍了TTX的化学特性,毒性作用机制、药理作用、检测方法,在不同生物种中的分布,能产生TTX的微生物种类,以及在此基础上提出的TTX微生物起源学说的国内外最近研究报道,并提出了TTX微生物起源学说的应用前景及今后的研究课题。 相似文献
8.
Yoshihiro Yokoyama Hiroshi Tsukamoto Tohru Suzuki Shohshi Mizuta Reiji Yoshinaka 《中国海洋大学学报(英文版)》2005,4(3):214-218
In this study, genes of two distinct tissue inhibitors of metalloproteinases-2 (TIMP-2) from Japanese puffer fish Fugu rubripes, Fugu TIMP-2a and TIMP-2b, were cloned. The open reading frames of Fugu TIMP-2a and TIMP-2b cDNAs are composed of 660 and 657 nucleotides and 220 and 219 amino acids, respectively. Both Fugu TIMP-2s contain 12 cysteine residues, which might form six disulfide bonds as in other animals' TIMP-2s. Reverse-transcribed polymerase chain reaction analysis showed the mRNAs of Fugu TIMP-2a and TIMP-2b to be expressed in some tissues examined with different expression patterns. These findings suggest that the two distinct Fugu TIMP-2s might perform different functions in Fugu tissues. 相似文献
1