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无尾目的

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Any of various wingless insects of the order Thysanura,such as the silverfish,having bristlelike posterior appendages.

衣鱼一种缨尾目的无翅昆虫,长有刚毛状后鳍,如蠹虫

In this study, we discussed the phylogenetic relationships in the Anura groups with the sequences of the 12 proteins encoded in the H-strand and 22 tRNAs of mtDNA from 21 species from GenBank. They all indicated that Anura were divided into the Archaeobatrachia and the Neobatrachia,these results supported the monophyletic origin of Anura.

结合饰纹姬蛙和金线蛙的mtDNA以及GenBank上公布的共21种无尾目的线粒体基因组,本文基于编码重链12个蛋白质的基因和编码22个tRNA的基因分别构建了MP系统树,分析了21种无尾目动物的亲缘关系,结果都显示将无尾目分为两大群,支持无尾目的单系起源。

On comparing with the common type 4, there are 18 genes presenting change in the rest 21 types, most of them are tRNA genes, and gene replacement, gene increase and gene absence are frequently happened; on the contrary, protein genes are more steady, gene change is mostly of gene replacement. The genome size of Gymnophiona are all smaller than 18000 bps and most of them range from 15000 to 16000 bps, those of Urodela and Anura are bigger than 16000 bps, most of Urodela range from 16000 to 17000 bps, most of Anura range from 17000 to 18000 bps.

与类型4比较,其余21种线粒体基因组类型涉及基因变动的基因共有18个,其中变动比较多的是tRNA基因,移位、增多和缺失的发生频率都较大,而蛋白编码基因比较稳定,主要是移位。78种两栖动物中,蚓螈目的线粒体基因组均小于18000bps,多数在15000~16000bps;有尾目和无尾目均大于16000bps,其中有尾目多数在16000~17000bps,无尾目的多数在17000~18000bps。

Any of various aquatic or terrestrial reptiles of the order Testudinesor Chelonia,having horny toothless jaws and a bony or leathery shell into which the head,limbs,and tail can be withdrawn in most species.

龟龟鳖目的各种水生或陆生的爬行动物,有角质无齿的颌,骨质的或似皮革的壳,许多品种的龟可将头、四肢和尾缩进壳中

The research purpose of this paper is to analysis the flight dynamic performance for unmanned aerial vehicle without empennage and to evaluate its operation and stable performance. Then offer some reference to design and development.

本文的研究目的是对无尾式无人机的飞行动力学特性进行分析研究,初步评价其操纵与稳定性能,从而为飞机的设计与研制提供一定的参考。

Any of various aquatic or terrestrial reptiles of the order Testudines, having horny toothless jaws and a bony or leathery shell into which the head, limbs, and tail can be withdrawn in most species.

龟龟鳖目的各种水生或陆生的爬行动物,有角质无齿的颌,骨质的或似皮革的壳,许多品种的龟可将头、四肢和尾缩进壳中

objective to investigate staining methods for two-dimensional gel(2-de)electrophoresis in multidrug resistance of gastric cancer.methods cultured vincristine-resistant human gastric cancer cell line sgc7901/vcr and its parental cell line sgc7901.variant amount protein of those cells were separated by 2-de.gels were stained with silver nitrate or colloidal coomassie brilliant blue,and scanned by image scanner.results well-resolved,reproducible 2-de patterns of sgc7901/vcr and sgc7901 were established.silver staining was better when protein sample amount was low,overloaded protein will interfere resolution of the maps.gels stained with colloidal coomassie brilliant blue had more protein spots numbers and abundance without apparent trails when increased loading protein sample.conclusion two staining methods were influenced largely by the sum of protein samples,properly selection may be helpful for further study with proteomics in multidrug resistance of gastric cancer.

低甲氧基果胶的胶凝机理及防止预凝胶。。。他扎罗汀凝胶与克林霉素凝胶治疗痤疮。。。注射隆乳后经乳晕切口取出聚丙烯酰胺。。。目的分析利用蛋白质组学方法研究胃癌耐药相关蛋白质中双向电泳凝胶的染色显示。方法培养胃癌细胞sgc7901和长春新碱诱导的耐药胃癌细胞sgc7901/vcr,用双向凝胶电泳技术分离总蛋白,银染及胶体考马斯亮蓝染色,image scanner扫描仪扫描凝胶。结果获得了背景清晰、重复性好的双向凝胶电泳图谱,两种染色凝胶相比,硝酸银染色在样品少时显示更佳,过量则影响图像质量,而胶体考马斯亮蓝染色在上样量增加时的凝胶蛋白质点数目及丰度均增加,并无明显拖尾。结论两种显色方法受样品量影响较大,恰当选用有利于通过蛋白质组学研究胃癌耐药机制工作的进一步开展。

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