226 resultados para 263
Resumo:
对13只黑叶猴和7只菲氏叶猴手掌面和足跖面皮纹作了研究。结果表明: 指和趾端花纹全部 为原始窦状花纹; 掌面上有4种花纹, 跖面上有6种花纹, 2种叶猴间存在一定的差异; 裳面 上的三角有5—7个, 跖面上有4—6个。此外, 还利用变量分析方法来揭示黑叶猴和菲氏叶猴的裳面的跖面花纹之间的相关关系。图4表5参14
Resumo:
记述了采自云南南部和西部的阔头蝽属二新种, 其一, 三带阔头蝽Acesines trifasciatus与A. laticeps近似, 但雄性外生殖器有显著区别。其二, 三齿阔头蝽A. tridentatus与 A. trifasciatus近似, 但体大, 色浅, 雄虫外生殖器明显区别。模式标本第一作者单位。
Resumo:
用12种限制性内切酶分析了猪獾和黄鼬的mtDNA限制性片段, 并用双酶法构建限制性内切酶图谱。对哺乳动物mtDNA限制性位点在远缘物种间的保守性和变异性进行了探讨。
Resumo:
目的 探讨眼睛蛇毒因子(CVF)对血清总补体活性及对豚鼠到大鼠异种心脏移植超急性排斥反应的影响。方法 15只正常大鼠随机分成3组。按组分别一次性静脉给予20,50,100μg/kg的CVF,检测不同时间点的补体活性;在豚鼠到大鼠异位心脏移植前24h静脉给予CVF50μg/kg,观察CVF对异种心脏移植超急性排斥反应的影响。结果 在给予CVF后6h,3个剂量组的血清总补体活性均显著降低。3个组用药后均未见明显毒副反应。使用CVF的实验组,移植的异种心脏存活时间显著延长,平均达56.13h,对照组仅为0.19h(P<0.001)。病理检查结果证实实验组均未发生超急性排斥反应,仅见延迟性异种排斥反应(DXR)的病理特征。对照组均见超急性排斥反应的病理特征。且总补体活性较术前有明显下降。结论 眼镜蛇毒因子有良好的降低大鼠补体活性的作用,且副作用不明显;使用眼镜蛇毒因子可克服豚鼠到大鼠的异种心脏移植超急性排斥反应的发生。
Resumo:
A rosy-pigmented Gram-negative, thermophilic bacterium with an optimum growth temperature of about 55degreesC was isolated from Tengchong hot springs in Yunnan province, China. Its growth scarcely occurred below 40degreesC or above 70degreesC. Phylogenetic and secondary structural analyses of 16S rRNA and DNA-DNA hybridization showed that the organism represented a new species of the genus Meiothermus. This new species could be distinguished easily from other species of the genus Meiothermus by the following phenotypic characteristics: rosy pigment, expanded body, sucrose and maltose were not utilized, gelatin and starch were not hydrolyzed. On the basis of the above data, the name Meiothermus rosaceus sp. nov. was proposed for the species represented by the strain RH9901(T)(CCTCC-AB200291). (C) 2002 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.