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The graft ratio of the system using benzophenone as initiator in the presence of 1.2 Tesla of external magnetic field is more than three times than in the absence of magne tic field.

但是无论是用二苯甲酮、蕙醒还是安息香作为引发剂,异戊二烯的相对接枝率都相当低,一般不超过40多。

The effects of aromatic solvents, catalyst amount used and reaction conditions on the enantiomer excess e.

本文还探讨了手性相转移催化条件下扁桃酸异构体的不对称合成。

The monoclinic phase of 〓, This is an isomer of orthorhombic-〓. It ensures theexistence of different phases of 〓.

4〓的单斜相这是已知的正交相〓的一个同质异晶体,它的获得确证了〓的不同相的存在。

Therefore it is not rational to regard Trairūpya as rule. It is not reasonable treated Trairūpya as reasoning, because Trairūpya is an objective truth of self-evident, but reasoning being a subjective thought form from known to unknown.

另外,因三相的不可缺一也不能归咎于因明的特殊风格或者对敌者的心理状况不同,因为同品与异品并不是一对矛盾概念,从而不能由第三相推出第二相,况且这二相的性质、作用在因明体系中是不同的、不能互相取代的。

The properties of all phase composition s, types of main crystalline phase, sizes of grains and their distribution, properties of daily steatite ceramics were described in this paper.

叙述了日用滑石瓷结构中的各种物相比例,主晶相类型、粒径大小及其分布状态、性质,介绍了其具有晶体小、结构细微、光学性质相似,具有同质异构体的独特显微结构,探讨了显微结构与生产工艺、各项性能的相互依赖关系。

The results show that isobutene oligomerization is fast liquid-solid reaction. Under the temperature of 80 ℃~120 ℃ and pressure of 2.0 MPa, the products of oligomerization are mainly dimers and trimers of isobutene. The yield of trimers is higher than that of dimers and the mass fraction of trimers decreases with reaction temperature increasing. The yield of tetramers is much lower than that of dimmers and trimers. The tetramers are formed by reaction of isooctenes and C8 carbonium ion.

结果表明,异丁烯齐聚反应为快速液固相催化反应,在80 ℃~120 ℃,2.0 MPa的实验条件下,反应产物主要是异丁烯的二聚物和三聚物,且三聚物的收率远高于二聚物,两者的浓度比值随反应温度的升高而下降;少量四聚物的生成主要源于碳八烯烃与碳八正碳离子的反应。

Combined with the regional data the research indicates that (1) the Tianmenshan main body formed in the Middle Jurassic Epoch, whereas the minor body was the further differentiated and evolutive product of the main body;(2) in the Chongyi-Dayu-Shangyou ore concentrated area, the west of Gannan area, the diagenetic age and metallogenic age are basically concordant, and the mineralization concentrated during 150~155 Ma;(3) from the middle-plutonic granite intrusion to the hypabyssal granite-porphyry vein, the magmatic activities experienced only 1~5Ma, indicating there was the concentrated period of mineralization.

结合区域资料,研究表明:①天门山岩体的主体形成于中侏罗世,补体是主体进一步分异演化的产物;②在赣南西部的崇余犹矿集区内成岩与成矿的年龄基本上是协调一致的,成矿集中期为150~155 Ma;③岩浆活动由中深成相花岗岩侵入体演化到浅成相花岗斑岩脉仅相差1~5Ma,表明存在成矿集中期。

The trophoblast blood flow spectrum could be easily detected with the guide of CDE.The ultrasonic findings were characterized by broad arterial flow spectrum,high diastolic component of the low resistance trophoblastic flow,RI=0.40~0.51 with single or biphasic spectrum.The salpingian ring with high blood flow indicated early and complete salpingian pregnancy.

结果:①异位妊娠包块血流信号丰富,血管连续性好,能较完整显示血管床、血管网及范围广的低流速血流信号;②脉冲多普勒取样为滋养层周围性血流频谱,其特征为:频谱增宽、单相或双相持续存在、阻力降低(RI=0.44±0.04)、舒张期血流丰富的动脉频谱;③具有鲜明丰富的滋养层周围性彩色血流频谱特征的&输卵管环&是早期输卵管妊娠的特征性表现,并提示是输卵管完整存在的标志。

Based on the experimental data of the displacement of oil by water in the Liuchu Oilfield and other relevant experimental data, the calculation of univariant facies differentiation indexes indicates that the interference from porosity and permeability can not be eliminated.

在留楚油田沙一段储集层的水驱油实验和其他相关实验测定数据的基础上,进行单变量相分异指数的计算,结果表明孔隙度和渗透率对最终驱油效率的影响并不能通过分沉积微相来消除。

We use AOT/iso-octane/water reverse micelles as a biological model to mimic the properties of triplet-excited-state porphyrin in the interfacial region. The amphiphilic property of compound is difficult to evaluate for different system.

用AOT/异辛烷/水反相胶束体系营造了一个多相、多界面的环境,通过对卟啉化合物三重态寿命的测量,研究了以亲水基团为端基的具有不同侧链链长的两亲卟啉化合物的界面行为,探讨了卟啉化合物的亲水疏水性质与界面环境间的相互作用,这对卟啉类光疗药物的结构优化具有帮助。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力