二倍

Moreover, the effects of the molar ratios of the reagents on the yield are examined. The best molar ratios are a 2.0 molar equivalence of thionyl chloride and a 3.0 molar equivalence of paminophenol to retinoic acid, and the total yield is 80.7%.

此外，研究了反应试剂的摩尔比对反应收率的影响，最佳摩尔比为二氯亚砜和对氨基苯酚物质的量分别是维甲酸物质的量的2倍和3倍，总收率为80.7%。

The overall yield was 43.6%.The yield of reduce of ester was increased nearly one times than the past method because of KBH4-LiCl as the reducing agent instead of NaBH4. Changing the reaction conditions of bromization, the one-way yield enhanced 30%. The yield of reduce of the bromide was added by one times by improving the process. Tefluthrin was achieved by the catalytic esterification of DCC and DMAP.

优化后工艺对四氟对苯二甲酯的还原采用了廉价高效的还原试剂KBH4-LiCl，使收率比NaBH4法提高了近一倍；对溴化反应条件进行了优化，单程收率提高了30%；对溴化物还原条件的优化，使其收率提高了近一倍；采用了催化剂DCC和DMAP合成了最终产品七氟菊酯。

This method is simple, rapid, accurate and effective for testing the impurity dibenzyl-(2-chlorophenyl) methanol in Clotrimazole and Betamethasone Dipropionate cream and for its content determination.

所建方法准确、简便、快速，适用于克霉唑倍他米松乳膏中克霉唑和二丙酸倍他米松的含量测定和杂质二苯基-（2-氯苯基）甲醇的含量测定。

In order to study the pyrethroids pesticides stress on the physiological and biochemical process of vegetables, effects of different concentrions of fenvalerate stress (20% emulsifiable concentrate, recommended dose: 1500 times dilution; double dose: 750 times dilution) on the activities of antioxidant enzymes, and contents of malondiadehyde in pakchoi were investigated under the open-field condition.

为探讨菊酯类农药胁迫对蔬菜生理生化过程的影响，以小白菜为研究对象，采用大田试验研究了不同浓度氰戊菊酯（20%乳油，推荐用量：稀释1500倍；加倍用量：稀释750倍）对小白菜抗氧化酶活性及丙二醛含量的影响。

The present invention can make osteoplast and hemopoietic stem cell well grow to result in cell proliferation of 23 times and 49 times separately in 10 days, and is suitable for large scale culture of cells.

本发明的效果和益处是可使成骨细胞及造血干细胞在此系统中良好生长，十天后细胞的扩增倍数分别可达到二十三倍和四十九倍，适合细胞的大规模培养。

To avoid the low yield in direct hydrosilylation addition of allyamine, 1, 1, 1, 3, 3, 3-hexamethyldisilazane is used to protect the amino groups, and the protective groups are removed easily after hydrosilylation addition, then the high yield of ladderlike copolymethyl-aminpropylsilsesquioxane was obtained.

为了克服将烯丙基胺直接与聚氢基甲基倍半硅氧烷进行硅氢加成反应接枝效率低的缺点，探索用六甲基二硅氮烷对烯丙基胺预保护，硅氢加成反应后再脱保护，从而以较高产率制备了含胺丙基、甲基的反应性梯形共聚倍半硅氧烷。

In order to obtain viable tetraploids, which remains a major challenge worldwide, research on spindle organization and chromosome behavior was carried out mainly in zhikong scallop, Chlamys farreri, a typical commercially important species which is being cultured in North China Sea. Immunofluorescent technique and laser scanning confocal microscopy has been developed for observation of both microtubule organization and chromosome segregation. Orcein squash method was also used for chromosome observation. A series of complicated configurations of the meiotic spindle and associated patterns of chromosome segregation, including tripolar and seperated bipolar segregation, were found in developing eggs following the inhibition of the first polar body.

为了攻克可存活四倍体人工培育技术的国际性研究难题，本研究选取了我国北方海区的典型经济贝类栉孔扇贝为主要研究对象，建立了一套免疫荧光染色和激光扫描共聚焦显微技术，结合使用染色体地衣红压片观察技术，对第一极体受抑制的受精卵的减数分裂纺锤体装配、染色体分离动态进行了研究，发现了一系列特殊的纺锤体装配及相应的染色体分离行为，包括三极分离、独立二极分离等分离类型，从亚细胞水平上阐明了四倍体形成的细胞学机理。

Meditations of evolution increasingly vaster: of the moon invisible in incipient lunation, approaching perigee: of the infinite lattiginous scintillating uncondensed milky way, discernible by daylight by an observer placed at the lower end of a cylindrical vertical shaft 5000 ft deep sunk from the surface towards the centre of the earth: of Sirius 10 lightyears (57,000,000,000,000 miles) distant and in volume 900 times the dimension of our planet: of Arcturus: of the precession of equinoxes: of Orion with belt and sextuple sun theta and nebula in which 100 of our solar systems could be contained: of moribund and of nascent new stars such as Nova in 1901: of our system plunging towards the constellation of Hercules: of the parallax or parallactic drift of socalled fixed stars, in reality evermoving wanderers from immeasurably remote eons to infinitely remote futures in comparison with which the years, threescore and ten, of allotted human life formed a parenthesis of infinitesimal brevity.

347关于宇宙日益扩大进化的冥想：新月期的月亮，即使在近地点也看不见。从地表向地轴挖掘纵深五千英尺的圆筒状垂直轴，一个观察者呆在轴底儿上，就连白昼也辨认得出那漫无止境、网络状、亮光闪闪、非凝结性的银河。天狼距地球十光年（五七、000、000、000、000英里）；体积大于地球九百倍；大角；岁差运动；有着&猎户&腰带、六倍于太阳的&伐二&以及星云的猎户座，星云中能容纳我们的一百个太阳系；死去的和新生的星宿，例如一九0 一年的那颗&新星&我们的太阳系正朝着武仙座冲去；所谓恒星的视差或视差移动，也就是说，实际上恒星是在不断地从无限遥远的太古朝无限遥远的未来移动着。相形之下，人的寿命充其量才七十年，不过是无限短暂的一段插曲而已。

It is suggested that 210Po was easily absorbed and removed from the solution by the riverine particles.

二仁溪河水中颗粒相210Po的活度是溶解相210Po活度的3~90倍，而颗粒相的210Po含量约占总210Po含量77%，颗粒相210Pb活度是溶解相210Pb活度2.2 ~102.3倍，平均占总210Pb含量68 %。

Article 72 If an enterprise, in violation of the provisions of Article 53 of this Law, adulterates coal and sells inferior coal as quality coal, it shall be ordered to stop selling coal, its unlawful proceeds shall be confiscated and it shall be imposed with a fine of not less than one time and not more than five times its unlawful proceeds, and its coal production license may be revoked or it may be disqualified from dealing in coal in accordance with law

第七十二条违反本法第五十三条的规定，在煤炭产品中掺杂、掺假，以次充好的，责令停止销售，没收违法所得，并处违法所得一倍以上五倍以下的罚款，可以依法吊销煤炭生产许可证或者取消煤炭经营资格

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。