查询词典 lewis

A catalytic amount of Ln(OSO2CF3)3 affected the stereochemistry of-MOPMAM during radical polymerization: the polydispersities of the polymers prepared in the presence of the Lewis acid were broader than those without the Lewis acid and the absolute value of specific rotation decreased in a majority of solvents.

结果表明，在-MOPMAM的聚合反应中，加入稀土盐可观察到明显的效应：在大部分情况下，随着三氟甲磺酸稀土盐加入量的增加，聚合物分子量分布变宽，旋光度也有很大幅度的下降。

In 1952, while Lewis was immersed in writing The Chronicles of Narnia, Lewis met Joy Davidman Gresham.

1952年，而刘易斯是沉浸在写作纳尼亚传奇，刘易斯满足欢乐Davidman格雷沙姆。

Holyfield and Lewis stepped on the scale at Madison square Garden 0n Wednesday. Lewis weighed

星期三，霍利菲尔德和刘易斯在麦迪逊花园广场称了体重，刘易斯重246磅，霍利菲尔德体重215磅。

The literature of Oxford dons, from Lewis Carroll to Tolkien and CS Lewis, suggests that a certain infantilism is admired.

从刘易斯·卡罗尔到托尔金再到C.S。

New Hampshire: Josiah Bartlett, William Whipple, Matthew ThorntonMassachusetts: John Hancock, Samual Adams, John Adams, Robert Treat Paine, Elbridge GerryRhode Island: Stephen Hopkins, William ElleryConnecticut: Roger Sherman, Samuel Huntington, William Williams, Oliver WolcottNew York: William Floyd, Philip Livingston, Francis Lewis, Lewis MorrisNew Jersey: Richard Stockton, John Witherspoon, Francis Hopkinson, John Hart, Abraham ClarkPennsylvania: Robert Morris, Benjamin Rush, Benjamin Franklin, John Morton, George Clymer, James Smith, George Taylor, James Wilson, George RossDelaware: Caesar Rodney, George Read, Thomas McKeanaryland: Samuel Chase, William Paca, Thomas Stone, Charles Carroll of CarrolltonVirginia: George Wythe, Richard Henry Lee, Thomas Jefferson, Benjamin Harrison, Thomas Nelson, Jr., Francis Lightfoot Lee, Carter Braxton

因此，我们，集合在大陆会议下的美利坚联合邦的代表，为我们各项正当意图，吁请全世界最崇高的正义：以各殖民地善良人民的名义并经他们授权，我们极为庄严地宣布，这些联合一致的殖民地从此成为、而且是名正言顺地成为自由和独立的国家；它们解除效忠英国王室的一切义务，它们和大不列颠国家之间的一切政治关系从此全部断绝，而且必须断绝；作为自由独立的国家，它们完全有权宣战、媾和、结盟、通商和采取独立国家理应采取和处理的一切行动和事宜。

The results showed that C 2H 6 can be adsorbed on the surface terminal oxygen of Lewis base site P=O bonds through H atom in -CH 3 to form a molecular adsorption state, and the adsorption intensity of C 2H 6 increases with the rising of adsorption temperature.

结果表明，乙烷能够以 CH3 中的H原子吸附于催化剂表面P =O键的端氧上形成分子吸附态，并且随着吸附温度的升高，对乙烷的吸附强度逐渐增大；乙烯则主要是以C =C双键吸附在催化剂的Lewis酸位Fe3 +上。

In addition, in-situ infrared spectroscopy provides the information about the nature of the surface acid and base sites. For example, Lewis acid and base sites on metal oxides are coordinatively unsaturated metal cations and oxygen anions, respectively, while Brinsted acid and base sites are the hydroxyl groups on the surface.

结合原位红外光谱，还能够详细地了解表面酸碱中心的性质：金属氧化物表面的Lewis酸中心和碱中心分别是表面配位不饱和的金属离子和氧负离子， Brinsted酸中心和碱中心则是金属氧化物表面的羟基。

After the failure of achieving good enatioselectivity in asymmetric Baylis-Hillman reaction, we turned our attention to traditional chiral Lewis base catalyzed asymmetric Baylis-Hillman reaction.

我们还发现，用咪唑与-脯氨酸共催化醛和丁烯酮的Baylis-Hillman反应，但产物的e.e值还是很低，因此又回到了传统的用手性Lewis碱催化不对称Baylis-Hillman反应研究中。

The result indicates that the big π bond of benzene not only turns benzene into a Lewis base,but also makes it to undergo electrophilic substitution (halogenation,nitration,sulfonation and so on),rather than addition

结果表明，苯的环状大π键结构不仅使苯成为1个Lewis碱，而且使苯容易发生卤代、硝化、磺化等亲电取代反应，但不易发生加成反应。

Isobutane can be chemisorbed on surface terminal oxygen of Lewis base sites M=O bonds by one or two H atoms in-CH〓.

异丁烷分子以CH〓中C-H键的H端单位或双位吸附于催化剂表面Lewis碱M=O双键的端氧位。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。