当量

A method for the preparation of microcellular elastomeric polyurethane foams from a reaction mixture comprising a polyisocyanate component containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a variant thereof, a polyol composition comprising at least one polyoxyalkylene polyol having an average nominal hydroxyl functionality of from 2 to 6, an average hydroxyl equivalent weight of at least 1300 and an average oxyethylene content of between 50 and 85% by weight, water, a chain extender having an average hydroxyl equivalent weight of from 15 to 250 and optionally a crosslinking agent, the hardblock-content being more than 45% by weight.

本发明是有关一种制备微孔弹性聚氨基甲酸酯泡沫体的方法，其反应混合物包括：一种含至少85重量％的4，4′－二苯甲烷二异氰酸酯或其变体的聚异氰酸酯组分，一种多元醇组合物，其包含至少一种平均标称羟基官能度从2至6、平均羟基当量至少1300且平均氧乙烯含量介于50至85重量％之间的聚氧亚烷基多元醇，水，一种平均羟基当量为15至250之增链剂，以及视需要使用的交联剂，该硬性嵌段－含量（hardblock-content）大于45重量％。

Thirdly,in the view of some different results between the reaction of complexes(2)、(3)and[(Me_3Si)_2N]_3LnLi_3 with aromatic aldehydes, the reaction of 2 equiv of aromatic aldehydes with 1 equiv of lithium amide(1) catalyzed by the YCl_3 was subsequently studied,and better yields of the corresponding amides and alcohols can be isolated.These results indicated that the enolate ligand in complexes(2)、(3)may have impact on the Cannizzaro disproportionation reaction.

第三，鉴于上述配合物2、3和[(Me_3Si_2)2_N]_3LnLi_3与芳香醛反应结果上的一些差别，我们又以三氯化钇为催化剂，将两当量的芳香醛与一当量化合物1的锂盐直接进行反应，结果以较好的产率得到了相应的酰胺和醇，这说明配合物2、3中所含的乙烯醇基可能对此Cannizzaro-型歧化反应存在一定的影响。

Firstly,two novel rare earth complexes(CH_2=CHO)Ln~Ⅲ[2,6-_2PhNSiMe _3]_2Li_3Ln=Y(2,Yb(3)containing arylamido and enolate mixed ligands have been synthesized by treatment of 2 equiv of of 2,6-~iPr_2PhNHSiMe_3 with exces n-BuLi at -78℃in THF for 12h,followed by reaction with 1 equiv of LnCl_3at 80℃for 24h in one-pot.All the two compounds were characterized by spectroscopic methods,elemental analyses,and a single-crystal X-ray diffraction study.

首先，-78℃下，在两当量的2，6-~iPr_2PhNHSiMe_3(1)THF溶液中加入过量的n-BuLi，反应12小时，再加入一当量的LnCl_380℃下，反应24小时，一锅法合成了含胺基、乙烯醇基混合配体的新型稀土金属配合物(CH_2=CHO)Ln~Ⅲ[2，6-_2PhNSiMe_3]_2Li_3Ln=Y(2、Yb(3)，上述化合物结构经单晶X-ray衍射、光谱和元素分析表征，表明我们得到的是一类新型的三价稀土配合物。

Total entropy and internal energy are used in combustion model to avoid the stoichiometrical assumption.

模型中引入总焓、总内能计算燃油的燃烧，使燃烧可按实际当量比进行，无需引入等当量燃烧假设。

The older liquid-fuel missiles carry single warheads with yields estimated at 3.3 MT. The newer solid-fuel missiles have single warheads with maximum yields of a few hundred kilotons each.

早期的液体燃料导弹携带一枚当量大约为330万吨的核弹头，新型的固体燃料则装备一枚最大当量为数十万吨的核弹头。

Http://bbs.cqzg.cn The older liquid-fuel missiles carry single warheads with yields estimated at 3.3 MT. The newer solid-fuel missiles have single warheads with maximum yields of a few hundred kilotons each.

早期的液体燃料导弹携带一枚当量大约为330万吨的核弹头，新型的固体燃料则装备一枚最大当量为数十万吨的核弹头。

The older liquid-fuel missiles carry single warheads with yields estimated at 3.3 MT. The newer solid-fuel missiles have single warheads with maximum yields of a few hundred kilotons each.

春秋中文社区http：//bbs.cqzg.cn 早期的液体燃料导弹携带一枚当量大约为330万吨的核弹头，新型的固体燃料则装备一枚最大当量为数十万吨的核弹头。

This article has studied HG70 steel and HS-70 welding wires weldings,the welded joint,welding quality,and the welding operational performance,in restricts under the welding condition,Uses HS-70 welding wires,Experiments the steel plate the weld joint stretch,degree of hardness and the resilience test result indicated that,HG70 steel and HS-70 welding wires weld joints have the low crack sensitivity,The welding quality is good,Its weld joint has the fine mechanics performance,thus explained they had the fine welding match.

0前言非调质钢具有优良的使用性能和较低的生产成本，受到普遍重视。HG70钢是武钢开发的工程结构用钢，具有强度高、低温韧性好的特点。传统高强度钢一般碳当量较高，焊接性能较差。通过加入微量合金元素、采取新的控轧和调质工艺，使得HG70钢在提高强度的同时，亦保持了较高的韧性和较低的碳当量，因而从理论上讲HG70应具有较好的焊接性能，但HG70钢与HS-70焊丝的匹配情况，还有待于分析验证。

Was considered by analysts to be at least a partial failure because of its low explosive yield, less than the equivalent of 1,000 tons of dynamite, which is much smaller than most nuclear blasts.

分析家们认为，朝鲜10月9日的核试验至少局部失败，爆炸当量低，还不到1000吨炸药，比多数核爆炸当量少得多。

As for the direct reactions of ketones or aldehydes and DyI_2, the formation of products can be controlled by adjusting the quantity of DyI_2, when DyI_2 is used as 1 equiv.

对于醛、酮直接与DyI_2的反应，则可以通过调节DyI_2的计量来控制产物的生成，当DyI_2的用量和醛或酮是等当量时，得到的是频那醇偶联产物；而当DyI_2的用量是两倍当量时，得到的就是相应的醇。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失