单种的

The circumscription of Silaum is controversial, with some authors treating it as a unispecific genus with only S .

Silaum 的划分是有争议的，有些学者把它作为单种的属只包括 S。

In this paper,the methods of distance geometry are used to explore the angles of a simplex ,and the second cosine law of a simplex in another form is obtained.

运用距离几何的研究方法，研究了和单形相关的角，给出了单形第二余弦定理的另一种形式，以此为基础得出了BartO¨s体积公式一种简洁的证法；探讨了单形的几个体积公式之间的联系，并推广了单形的一个体积公式。

But innovations by competitor species, or the emergence of altogether new species, prevent any permanent hierarchy or monoculture from emerging.

但竞争物种的创新，或全新物种的出现阻止了任何永恒的层级或者单种的产生。

The Infrared Spectrum,monosaccharide composition, periodate oxidation and partial acid hydrolysis were also used to give out details of MHP structures information.

采用红外光谱法，单糖组成，部分酸水解和高碘酸氧化等相关分析方法对MHP-2中单糖的连接方式及主链、支链的单糖各键型的比例进行了研究表明虫草多糖中的单糖组成为甘露糖：葡萄糖：半乳糖三种单糖=

The sequences of segments of the trnL intron from 29 species and trnL-trnF IGS from 21 species of Magnoliaceae were analyzed. The results from the strict consensus trees were consistent with the former systems ① several species within the genera Michelia were homologious;② the subgenera Yulania was extremely homologious and much far from subgenera Magnolia;③ the species within Manglietia were highly conservative.

通过木兰科29个种的trnL基因内含子的525个碱基序列及21个种的trnL-trnF基因间隔区的370个碱基序列测定和分析，构建的严格一致性树建议：①含笑属为相对一致的单系类群；②玉兰亚属的几个种形成一个单系类群，与木兰亚属的几个种无共衍位点；③木莲属为个相对保守的类群，种间碱基差异很小。

The best four single-factor components were determined according to the effects of different carbon and nitrogen sources, inorganic salts, water-material ratio on xylanase-producing observed in the single-factor test; and on the base of this test, the best combination of tested factors were confirmed through the orthogonal experiment and its zymology properties was also studied.

通过单因素试验观察了不同碳源、氮源、无机盐、水料比4种因素对产木聚糖酶的影响，确定了4种最佳的单因素成分；在单因素的基础上，再通过正交试验确定了所试因素的最佳组合，并对其粗酶的酶学性质进行了研究。

Species: mainly in E Asia, two monotypic genera in S America; seven genera and 37 species (25 endemic) in China.

属和约50种：主要在东亚，两单种的属在南美洲；在中国的7属和37种(25特有)。

Taxonomical status of the monotypic genus is distinct,and the distribution is specific too.

中国大型担子菌单种属113个，隶属于48科，10目，其中一部分是世界单种属，另一部分为中国境内目前只报道一个种的属。

The results are as follows: 1 The ingroups studied are divided into four clades on the molecular phylogenetic trees that we reconstructed.

我们测定了斑腿蝗科10亚科20种蝗虫和其它蝗科3种蝗虫的16S rDNA序列片段，并从GenBank中下载了斑腿蝗科3种、其它蝗科10种及蚱总科2种的16S rDNA相应序列片段，然后对这共计38种蝗亚目昆虫的16S rDNA序列片段进行了同源性比较，以其中2种蚱作外群构建了蝗总科的分子系统树，得到的结论如下：1斑腿蝗科并非是一单系群。2该科中的切翅蝗亚科、稻蝗亚科、黑蝗亚科、秃蝗亚科、卵翅蝗亚科、蔗蝗亚科均不是单系群，分子系统树的聚类结果与基于形态特征的斑腿蝗科的分类体系有较大的出入。3支持将黑蝗亚科和秃蝗亚科合并为一个亚科——秃蝗亚科。4卵翅蝗、伪稻蝗和稻蝗三者有很近的亲缘关系。

The illumination is of no effect on the germination rate of oospores of Phytophthora sojae.30 single-oospore isolates obtained from the test strain of Phytophthora sojae Ps-H2 (Race 1 ) were evaluated using hypocotyl-inoculation method for race phenotype on soybean cultivars. One clone phenotype ( race 1 )was selected randomly for further isolation and virulence identify .

将大豆疫霉菌供试菌株Ps-H_2(生理小种1号)每代挑取30个单卵孢株，进行生理小种鉴定，随机挑选1株1号生理小种的单卵孢株继续进行单卵孢株分离和毒性鉴定，连续两代试验结果表明大豆疫霉菌原始菌株并朱出现毒性分化，表明原始菌株即为1号生理小种的毒性纯系。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。