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The homogeneous hydrogen transfer of acrolein to allyl alcohol was carried out with aluminium isopropoxide as catalyst.

采用异丙醇铝为催化剂,丙烯醛与异丙醇进行均相氢转移反应合成烯丙醇,对催化剂的再利用及催化剂的失活原因进行了研究。

Disaster embodies theidea of animatism and the division of man and heaven. In succession, itinvestigates the relationship between man and nature as shown in zaiyi, byanalysising the scientific elements in the theory of zaiyi, which is different fromdisaster in logic.

灾害反映了万物有灵、天人相分等思想观念;接下来,论文通过对"灾异说"中科学因素的分析,论述了灾异中的人与自然关系。

The thermodynamic phase equilibrium model and the phase diagram is the underline for any separation process.

热力学相平衡模型及相图是结晶分离研究的基础,本研究以二甲苯异构体三元系作为研究对象,通过不同的方法建立三元系的固-液相平衡热力学模型及相图。

It was applied to analyze the structures of ashless dispersants and their derivatives. The results were obtained and correlated. The molecular weight distribution and dipersity of ashless dispersant, number of polyisobutene R and polymeric degree of R polymerism in addition agent were obtained.

以Ultrastyragel为固定相,四氢呋喃作流动相,用普适标准校正曲线及凝胶渗透色谱法对无灰分散剂及其对应衍生物的结构进行了分析测定,并将测定结果相关联,计算出了无灰分散剂的相对分子质量分布、分散度及添加剂所含聚异丁烯R基的个数及R基聚合度。

Whether their intimacy was sexual, as was Lord Byron's with his half-sister Augusta, is not something that can ever be known, though it was scurrilously gossiped about even at the time.

拜伦与同父异母的姐姐奥古斯塔曾有巫山楚云之事,那么华兹华斯兄妹是否也是如此?这就无从得知了,虽然当时有人恶言相记,粗语相辱。

A reversed-phase high performance liquid chromatographic method was established for determination of isothiocyanates in human urine , which used the reaction of propyl isothiocyanate with 1,2-benzenedithiol as reference instead of the synthesis of 1,3-benzodithiole-2-thione.

省去合成1,3 苯二硫杂环五烯 2 硫酮这一步骤,直接用异硫氰酸丙基酯与1,2 苯二硫酚反应作标准,建立了尿液中异硫氰酸酯的反相高效液相色谱测定方法。

Using potassium bisulfate as the heterogeneous catalyst,isovaleric acid and n-butanol reacted to form flavor butyl isovalerate.

以异戊酸和正丁醇为原料,采用不溶于反应物系的硫酸氢钾为非均相催化剂合成了食用香料异戊酸丁酯。

Objective:An ionpair RPHPLC method was established to determine the amounts of lotusine, liensinine, isoliensinine and neferine in Plumula Nelumbinisimultaneously.

目的:建立同时测定莲子心中四种异喹啉生物碱莲心季铵碱、莲心碱、异莲心碱、甲基莲心碱含量的离子对反相高效液相色谱法。

Objective: To evaluate the value of double-phase 99Tc-MIBI tomographic imaging and mammography in diagnosis of breast lesions.

目的:分析比较卿99Tc-甲氧基异丁基异腈双时相断层显像与铝靶X线摄影法对乳腺肿块的临床诊断价值。

Iso-α-acids content of isomerized hop pellets was analyzed by reversed-phase high performance liquid chroma- tography.

利用反相高效液相色谱法研究异构颗粒酒花中异α-酸的测定方法。

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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