查询词典 cotton gum

Green fluorescent protein gene was conjugated to the 3 end of the PAP gene in order to screen easily of the transgenic cotton plants. The combined gene was cloned into plant expression vector pBI121 and then transformed. About 5000 seeds of the transgenic cotton were obtained and the some seedlings of the transgenic cotton could give a bright green fluorescence in the dark condition when the cotton seedlings were irradiated with ultraviolet rays. This result reflected that the GFP gene was expressed in the transgenic cotton; dot-blot result also demonstrated that PAP gene was exactly transformed into the cotton. The capacity of the Verticillium dahliae-resistance is being analyzed.

为了便于转基因棉花后代的筛选，在 PAP基因的 3'端融入了绿色荧光蛋白GFP）基因，然后将融合基因克隆在植物表达载体PBI 121上，再进行遗传转化，得转基因棉花种子5000余粒，将种子播种长到于叶展开时，先在黑暗中用紫外灯照射，查找表现绿色荧光的幼苗，然后再用地高辛标记的PAP基因特异性探针对这些棉花进行点杂交，最后发现有8株棉花表现阳性反应，说明PAP基因的确己经转到了棉花的基因组中，其棉花黄萎病的抗性鉴定正在进行之中。

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生产各种尼龙粘扣带/魔术贴、粘扣带、背胶粘扣带、电压粘扣带、松紧粘扣带、魔姑头粘扣带、勾毛同体粘扣带、不起毛粘扣带、细勾粘扣带、软钩粘扣带、热融胶自粘带、压克力自粘带、不刷毛粘扣带、防水防火粘扣带、塑胶勾粘扣带、伸缩粘扣带、电线捆绑带、特殊粘扣带、背胶魔术贴、背胶冲型圆形魔术贴、捆电线魔术贴、勾毛同体魔术贴、毛茹头魔术贴、特殊魔术贴、么术贴、背胶么术贴、电压么术贴、松紧么术贴

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The latest research discovers, hangs the decrease that the body some growth hormones secretes or stops because of the adult brain, will cause mouth cavity and gum's absorption toward vitamin C's appearing a serious obstacle and bring mouth cavity and the gum serious malnutrition thus, the serious result brought by this kind of malnutrition, the reaction atrophies physiology degeneration in the gum phenomenon consumedly advance of reality, this is also though people for brush teeth to wait after mouth cavity sweep value, the gum atrophies to still and gradually present the root reason that the low age turns.

据最新的研究发现，由于成年人脑垂体某些生长激素分泌的减少或停止，会导致口腔及牙龈对于维生素C的吸收出现严重障碍，从而带来口腔和牙龈严重的营养不良，这种营养不良所带来的严重后果，反应在牙龈萎缩生理退化现象大大提前的现实，这也是尽管人们对于刷牙等口腔清洁重视之后，牙龈萎缩仍旧日趋呈现低龄化的根本原因。

The tartar is a gums various tooth week the harmful germ stirs up a ratio can not little"carry a body", because the gum atrophies, but be disgusted with making oxygen germ can stir up, spread under the gums, hit gum and tooth over a long period of time the week organizes of health;In the meantime such as front say of because of the malnutrition of gum, this eliminates that long under, then cause the adult mouth cavity resist the disease violate of ability, along with age growth but significantly decadent result, thus cause various gum burning, tooth week burning, tooth Sui burning symptom.

牙石是龈下各种牙周有害病菌滋生比不可少的"载体"，由于牙龈萎缩，而令厌氧菌在龈下得以滋生、扩散，长期侵袭着牙龈和牙周组织的健康；同时如前面所说的由于牙龈的营养不良，此消彼长之下，进而导致成年人口腔抵抗疾病侵害的能力，随着年龄增长而大幅衰退的结果，从而引发各种牙龈炎、牙周炎、牙髓炎症状。

Meanwhile,introduce the resource state of the huge Timber Mountain Gum × Flooded Gum timber of end too,combine gradually deficient wildwood timber resources in our country, so, huge Timber Mountain Gum × Flooded Gum timber physics mechanics nature includes the tail: Moisture content , density, swelling, obey the compression strength of the line, horizontal line compression strength , bending strength , resist curved elastic mould amount , resist intensity of cutting , carry on experimental study along line along line tensile strength and hardness, there is a very important and real meaning.

同时，也介绍了尾巨桉木材的资源状况，结合我国逐渐匮乏的天然林木材资源，因此，对尾巨桉木材物理力学性质包括：含水率、密度、湿胀性、顺纹抗压强度、横纹抗压强度、抗弯强度、抗弯弹性模量、顺纹抗剪强度、顺纹抗拉强度及硬度进行试验研究，将有着十分重要而实际的意义。

From the UV spectra, it can be found that the aromaticity of acenaphthenyl groups in C_2 gum is the largest. But there are 30 carbon atoms in the conjugated structure of condensed aromatics in C_1 gum and C_3 gum, while 28 carbon atoms in acenaphthenyl groups in C_2 gum.

但是，在C_1胶、C_2胶和C_3胶三者中，C_1胶侧链上的四苯基苯基和C_3胶侧链上的菲式多苯基苯基都含有30个碳原子，而C_2胶侧链上的苊式多苯基苯基含有28个碳原子，比前面二者小2个碳原子，理应其芳香性在三者之中最小，但事实却恰恰相反。

So, the aromaticity of acenaphthenyl groups in C_2 gum should be the least. In order to explain the reason, quantum chemical calculation is utilized. The optimized geometrical structrures of condensed aromatics in C_1 gum, C_2 gum and C_3 gum are calculated at B3LYP/6-31G* levels. We find that some phenyl groups in acenaphthenyl groups are coplanar and have the largest conjugated structure.

为了解释其原因，我们利用量子力学方法进行了计算，研究了三种稠环基团在B3LYP／6-31G*基组水平下优化得到的几何结构，发现苊式多苯基苯基中的萘环和中间的苯环共面，电子离域性最大，而其他二者所有苯环都不共面，发生了明显地扭曲；同时，在优化几何结构的基础上，对三种化合物进行了前线分子轨道的分析，利用密度泛函理论方法(density function theory，DFT)计算了稠环基团的最高占有轨道和最低未占轨道之间的能量差，即能隙，发现C_2胶上苊式多苯基苯基的Eg最小，解释了C_2胶具有最好的辐射保护效果的原因。

So, by the Diels-Alder reaction of tetraphenylcyclopentadienone, acenaphthenecyclone and benzophenanthrenecyclone with the vinyl groups in C gum, three kinds of polymethylvinylsilicone oil with condensed aromatics are synthesized respectively: polymethylvinylsilicone oil with tetraphenylphenyl groups (called C_1 gum for short), polymethylvinylsilicone oil with acenaphthenyl groups (C_2 gum) and polymethylvinylsilicone oil with benzophenanthrene groups (C3 gum).

根据此原则，利用四苯基环戊二烯酮、苊式环戊二烯酮和菲式环戊二烯酮与C胶上的乙烯基进行Diels—Alder反应，分别合成了三种含稠环基团的乙烯基硅油：四苯基苯基乙烯基硅油(C_1胶)，苊式多苯基苯基乙烯基硅油(C_2胶)和菲式多苯基苯基乙烯基硅油(C_3胶)，并根据~1HNMR谱图上不同氢原子的积分面积计算了三种胶中稠环基团和乙烯基的含量。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。