查询词典 poly

There are three copies of R fragment in the S mt-genome, and each copy contains two closely adjacent open reading frames: orf355 and orf77. Among these three copies two BamHI fragments were cloned, and the sequence analysis showed that cox1 and cox2 gene lies upstream of the R region in each fragment, respectively. However, they locate in different strands and head to head with R. In this study, we found that:(1) The expression of cox1 and cox2 is not affected by the transcription of R region;(2) The two copies of R region transcribe in large amount in the microspores, and produce transcripts of 1.6kb and 2.8kb, respectively, in the sterile microspores; However, the abundance of these two transcripts is reduced in the fertility restored microspores, realized through the mRNA decay, and this reduction occurs at the uninucleate microspore stage;(3) In the sterile microspores, the 5 terminus of the 1.6kb transcript contains a palindrome region that can fold into a stem-loop.

本研究发现：(1) cox1和cox2的转录没有受到R区转录的影响；(2)两个拷贝的R区在在不育花粉中高丰度表达，其转录本大小分别为1.6kb和2.8kb；而在育性恢复的花粉中，这两个转录本的丰度被大大降低，进一步分析表明这一结果是通过mRNA分子的降解途径来实现的，此降解过程发生在单核花粉期；(3)在不育花粉中，1.6kb转录本的5′末端具有一段可形成茎环结构的迴文对称序列，而在可育花粉中，其5′末端短缺了9个碱基；(4)在不育花粉和育性恢复的花粉中，R区转录本的加尾位点都集中位于一个3′茎环结构之后；(5)不管是在不育花粉还是育性恢复的花粉中，orf77区域内均在第52位和100位核苷酸处发生了不同频率的C向U的编辑，从而形成UGA终止密码；(6)不管是orf55-orf77的成熟转录本还是转录前体分子，都已被加上了Poly尾巴，表明已进入降解途径；在以上实验结果的基础上，本研究对S型CMS花粉育性的恢复机理进行了如下推测：在不育花粉和育性恢复的花粉中，orf77区域内均发生了终止编辑，即由RNA编辑产生了提前终止密码子。

In the pervaporation-aided esterification of valeric acid with ethanol, the valeric acid conversion is up to 95. 2%. The data about M5 selectivity and flux are measured for poly-component reacting system.

应用本文研制的化学改性聚酰亚胺膜，研究了渗透蒸发分离过程在戊酸乙酯合成反应中的应用，实验得到的戊酸最大转化率是95.2%，并研究了膜对多元反应物系的选择性，及膜的透过量。

Better results could be obtained, For 40 hours fermentation, cell dry weight and PHB concentration reached 32.7 g · L-1 and 21.4g · L-1 respectively.The synthesis of Poly (β-Hydroxybutyrate-co-β-Hydroxyvalerate) by the strain G-IIIy from different precusor was studied. It was found that the strain G-IIIy could accumulate PHBV with sucrose as carbon source and propionic acid or valeric acid as precursor . In 2L self-controlled fermentor, the dry cell weight, PHBV concentration and PHBV content reached 35.8g·L-1, 22.6g·L-1 and 38.4% respectively in the case of fermentation for 42 hours and the propionic acid as precursor.

研究了添加不同前体物，G-Ⅲy菌株生产聚β-羟基丁酸和聚β-羟基戊酸共聚物的发酵条件，结果表明，此菌株能以丙酸或戊酸为前体，在蔗糖为碳源的条件下合成PHBV共聚物；在2L发酵罐中，以丙酸为前体，发酵16小时开始流加丙酸，根据发酵液pH值变化控制丙酸流加量，发酵42小时，细胞干重、PHBV产量和含量分别达到35.8g/L，22.6g/L，63.13％。

With varnish and poly, this is a Major NO-NO.

随着漆和聚，这是一个重大的一氧化氮一氧化氮。

The poly-choral style originated from Venetian school in the 16th century is an important style of development of instrumental music which has affected the Baroque period and the period after Baroque.

摘要 源自十六世纪威尼斯乐派的复合唱风格，是影响了巴罗克时期，及其之后器乐曲发展的重要风格之一。

Poly vinyl alcohol hydrogel,titanium alloy,friction and wear behavior

中文关键词：聚乙烯醇水凝胶；钛合金；摩擦磨损特性

Plastic is used by the companies jointly developed by the Nanjing University with a new Plastic Composite Pipe plastics, poly vinyl alcohol, which added some 20 new materials greatly reduces the linear expansion coefficient of plastic. so in the steel and plastic composite materials to ensure the reliability.

公司使用的塑料是公司与南京大学联合研制的一种新型钢塑复合管专用塑料，以聚乙烯为母体，在里面添加了二十几种新材料，大大降低了塑料的线胀系数，从而在材料上保证了钢与塑复合的可靠性。

Copper ions greatly enhanced the sensitivity of the determination of molybdenum, which based on the color charge transfer complex of molybdotungstophosphate-3,3",5,5"-tetramethylbenzidine, in the presence of poly vinyl alcohol.

提出了一种基于铜离子增敏形成磷钼钨杂多酸-3，3'，5，5'-四甲基联苯胺电荷转移复合物测定痕量钼的方法。

The alkaline composite polymer solid electrolyte with good properties was prepared by solution cast method with poly vinyl alcohol, carboxyl methyl cellulose and KOH as raw materials.

以聚乙烯醇，羧甲基纤维素和KOH为原料，用溶液浇铸法制备了性能良好的碱性固态聚合物电解质。

We use Poly vinyl alcohol, acrylic acid and acrylonitrile as the materials, through the aldolisation of PVA and copolymerization of AA and AN, we prepared the composite membrane with balance theory of hydrophilic and hydrophobic water.

本文以聚乙烯醇和丙烯酸、丙烯腈为主要原料，通过PVA缩醛中醛的选择及膜制备方法的选择，根据亲憎水平衡理论设计出PVA缩甲醛膜上下两层包覆AA和AN共聚膜的复合膜，用此膜进行甲醇／水溶液的渗透汽化分离。

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。