查询词典 populations

Objective To investigate the prevalence of transfusion transmitted virus in different populations of China.

目的 了解不同人群输血传播病毒的感染状况。

A first reaction to these developments might be that they are favorable, as alongstanding tenet of state and local public finance has been that on efficiency grounds it ispreferable to assess subnational taxes using jurisdictions that encompass greater areas andlarger populations (e.g., state rather than local), as the interjurisdictional mobility of taxbases is significantly lower for such jurisdictions than for smaller entities; as a result,efficiency costs from suboptimal location decisions will be reduced, more progressivity in thetax structure may be introduced if deemed desirable, and economies of scale in revenuecollection may be realized.

第1个反应是，这些事态发展可能是有利地，他们作为一个，长期宗旨，国家和地方公共财政一直认为这是提高效率的理由宜评估使用更大的司法管辖区，包括地区和地方税较大的人群，由于流动性税收interjurisdictional基地，显着高于小实体，如司法管辖区为低；因此，从最理想的位置决定的效率成本将降低，在较累进税务结构，可由假如认为可取的，规模经济的收入收集可能得以实现。

The spore germination and gametophyte development of 21 ferns are studied. It indicates that :① the development period of prothallium and young sporophyte of the same species is different due to seeding time of spores;② the optimal temperatures of spores germination and gametophyte development of 21 ferns are about 15 -24 ℃;③ the rate of spore germination of rare ferns is much lower than the ferns which occur large populations in nature;④ the treatment with GA 3 can accelerate the germination of the spores;⑤ the prothallium changes from large to small, green to yellow when young sporophyte comes out. The prothalliums of all 21 ferns die away after the appear of the 3rd leaf of sporophytes;⑥ shapes of the 1st and 2nd leaves of the young sporophyte are different from those emerged later;⑦ spores cultured in dark can not germinate;⑧ a prothallium can develop only one young sporophyte though it has many archegoniums, and the spore propagation with leaf mould substrate is an economical method.

摘 要：以腐叶土为培养基质，对 21 种蕨类植物进行了孢子萌发和原叶体发育的研究，结果表明：①不同时期播种的同种蕨类的孢子，发育出原叶体和幼孢子体所历经的时间长短不同；②孢子萌发和配子体生长发育的适宜温度约为 15 ～ 24 ℃；③稀有蕨类的孢子萌发率低，而在野外能形成较大种群的蕨类的孢子萌发率高；④用 GA 3 处理孢子可以促进萌发；⑤当原叶体上长出幼孢子体时，原叶体由大变小，由绿变黄， 21 种蕨类的原叶体都在幼孢子体上长出第 3 片叶时消失；⑥幼孢子体上长出的第 1 、 2 片叶在形态上与以后长出的叶不同；⑦孢子萌发需要光；⑧ 1 片原叶体尽管有多个颈卵器，但仅发育出 1 株幼孢子体；⑨利用腐叶土进行蕨类孢子繁殖是一种经济实用的繁殖方法。

The 16S rRNA sequences of the bacterial endosymbionts from five geographic populations of two psocid species, Liposcelis bostrychophila and L. decolor was analyzed.

采用特异性引物PCR扩增、克隆和测序获得嗜卷书虱和无色书虱共5个地理种群体内共生菌16S rRNA基因序列。

Manifestations of psychopathy in specific populations are addressed, as are links to salient problem behaviors such as aggression, substance abuse, sexual offending, and recidivism.

在特定人群精神病表现得到解决，因为有联系，如侵略行为的突出问题，滥用药物，性犯罪和累犯。

There existed significant difference of pubescence angle on leaf blade in breeding lines of TA and NTA populations, and very significant correlation was found between pubescence angle on leaf blade and resistance to bean pyralid.

方差分析表明TA和NTA群体家系间叶片茸毛着生角度也存在极显著的差异。

And the variation in each population was quite high, which could provide the possibility for selection among and within populations for pulpwood of this species.

白桦天然种群间灰分与苯醇抽出物含量呈显著正相关，综纤维素与聚戊糖含量呈显著正相关。

The other part of the argument is that all observed pygmy populations have a short life expectancy.

争议的另外部分是所有观测到的侏儒人口都有较短的预期寿命。

Joint segregation analysis of P1, F1, P2 and F2 populations derived from a cross between Lishuizhongzihuang and Nannong 493-1 in soybean was used to study the inheritance of the resistance of soybean to bean pyralid in this article.

在田间自然虫源条件下，以溧水中子黄豆和南农493-1正反交组合的F2群体为材料，F2单株叶片损失率为抗性鉴定指标，应用亲本、F1和F2四个世代的数量性状主基因+多基因混合遗传分析方法，分析了大豆对豆卷叶螟抗性的遗传。

Some important traits, i.e., oil and protein contents, 100-seed weight, and the resistance of soybean to Bean pyralid in F2 population, the resistance of soybean to soybean mosaic virus with strain Sa in the F2:3 population, and the number of branches, the number of main-stem nodes and plant height in the F2 and F2:3 populations, were measured.

主要结果如下： 1。连锁图总长度为1091.34cM，标记间平均距离为16.53cM。利用公共遗传图谱，将21个连锁群与大豆染色体相对应。每个连锁群上的标记数目在2-8个之间，连锁群长度在17.71-129.33cM之间。相邻标记间平均间距最大的连锁群为D1b，为43.55cM；最小平均间距的连锁群为M，为13.86cM；有20个区间长度大于20cM。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。