合成碱绿色4的最佳条件包括：尿素和氯化锌作为催化剂，四氢呋喃和双色。
The optimal conditions for synthesis of alkali green 4 include the carbamide and zinc chloride as catalyst, chloranil and bichrome.
紫外线成像显示出的绿色漩涡以及可见光形成的图像揭示了氢和硫磺气体的存在，它们受发自四边形的强紫外线的辐射而变热并形成等离子体。
Swirls of green in Hubble's ultraviolet and visible-light view reveal hydrogen and sulfur gas that have been heated and ionized by intense ultraviolet radiation from the Trapezium's stars.
就像Hazen博士指出的那样，碳是宇宙中含量排第四的元素，仅落后于氢，氮和氧。
As Dr Hazen pointed out, carbon is the fourth-most-abundant element in the universe, after hydrogen, helium and oxygen.
例如，波音已经开发了一款名为“幽灵之眼”的氢动力无人飞行器，它能够在20000米(66000英尺)高空连续飞行四昼夜。
Boeing, for one, has a hydrogen-powered UAV called the Phantom Eye that will fly for four days at 20, 000 metres (66, 000 feet).
例如，波音已经开发了一款名为“幽灵之眼”的氢动力无人飞行器，它能够在20000米(66000英尺)高空连续飞行四昼夜。
Boeing, for one, has a hydrogen-powered UAV called the Phantom Eye that will fly for four days at 20,000 metres (66,000 feet).
“幻影眼”无人机拥有150英尺的翼展，由两个2.3升四缸氢燃料发动机提供动力，每个发动机提供150马力的动力。
Phantom Eye has a 150-foot wingspan and is powered by two 2.3-liter, four-cylinder hydrogen engines that each provide 150 horsepower.
如果把氢用来作裂缝检查(人们不这么做并是因为它们有火灾隐患)，他们逃逸的速度会比氦快四倍。
If hydrogen were used as a crack detector (it is not because of the fire hazard), it would escape four times faster.
结论亚甲基四氢叶酸还原酶基因C677T基因多态性可能是我国大肠癌的遗传易感因素。
Conclusion These findings demonstrated that the genetic variation of MTHFR C677T should be a genetic susceptibility factor for colorectal cancer in a Chinese population.
环合反应的条件缓和，产品收率和纯度高，在四氢咔唑类化合物的化学制备中具有重要参考价值。
The conditions of reaction of cyclization were moderate, the purity and yield of the product was higher.
考察了大孔强酸性树脂对1，4 丁二醇脱水制四氢呋喃的催化作用。
The catalysis of big pore strong acid resin for 1,4-butanediol dehydration to tetrahydrofuran is investigated.
分析国内外四氢呋喃的生产消费情况，对未来的需求进行预测，并对我国发展潜力进行了分析。
To analyze production and consumption situation of tetrahydrofuran at home and abroad. To assess its demand and potential development of tetrahydrofuran in China.
本文对四氢萘和香豆素的反应动力学和反应机理作了研究。
This paper is concerned with the kinetics and mechanism for the reaction between tetralin and coumarin.
塔格糖是果糖的“差向异构体”，在分子水平上，除了第四个碳原子上的羟基和氢基团倒置外，D -塔格糖与D -果糖的结构是一样的。
On a molecular level, D-tagatose is structurally identical to D-fructose, except for an inversion of the hydroxyl and hydrogen groups at the fourth carbon atom.
对丙酮、四氢呋喃、三乙胺、水混合物的分离进行了工艺流程设计和实验研究。
The process flow was designed and experimentally studied for separation of acetone, tetrahydrofuran (THF), triethylamine and water mixture.
建立了合适的吸附动态模型，用于分析四氢呋喃中的微量水在4a分子筛上动态吸附特性。
The dynamic adsorption model that described the characteristics of small amount of water from tetrahydrofuran on 4a molecular sieve was developed.
本发明涉及一种制备包含至少一个另外的含氧环的四氢吡喃衍生物的方法。
The invention relates to a method for producing tetrahydropyrane derivatives which comprise at least one additional ring containing oxygen.
提出了一种在氢氟化过程中同时进行氨还原改善脱硝产品氢氟化反应性的方法，以便生产出高品位的四氟化铀。
It proposes a method which improves reactivity of denitration products in hydrofluorination with ammonia reduction in order to produce high grade uranium tetrafluoride.
四氢噻吩是城市燃气的首选加臭剂，随着我国西气东输等工程的建设成功，其市场前景广阔。
Tetrahydrothiophene is the preferred Odorant in city gas. It is being used widely in market with the success of West-to-East gas Project.
在四氢呋喃存在下，将丙烯和丁基锂直接反应合成了未见文献报道的烯丙基锂四氢呋喃配合物。
New allyl lithium THF complex was prepared conveniently by the reaction of propene with n-butyl lithium in the presence of tetrahydrofuran.
本文研究了四氢呋哺对环已烷中苯乙烯阴离子聚合动力学的影响。
The effect of THF on the kinetics of the anionic polymerization of styrene in Cyclohexane was studied.
四氢萘加氢裂化反应的关键步骤和双环化合物裂解的转化率以及单环化合物的产率与两种催化剂担体的酸性及反应温度有关。
The key steps of hydrocracking of tetralin, the conversion of double ring compounds and the yields of mono-ring compounds were affected by the reaction temperature and the acidity of two catalysts.
本论文主要研究了以四氢糠醇为原料合成吡啶的工艺。
The process for the synthesis of pyridine using tetrahydrofurfuryl alcohol (THFA) as material was researched in this article.
其次，本文用正交实验设计和单因素寻优等有关实验方法对端羟基环氧环己烷-四氢呋喃共聚醚的合成工艺进行了研究。
Secondly, with the orthogonal design method and single-factor-experiment, the technics of synthesizing Hydroxyl-terminated copolymer of CHO -thf have been studied in this paper.
结论：进行甲氨蝶呤血药浓度监测有利于掌握好甲氨蝶呤和四氢叶酸钙的救援剂量，从而保证化疗的有效性和安全性。
CONCLUSIONS: MTX serum concentration monitoring is helpful for mastering the rational rescue dosage of MTX and calcium folinate so as to ensure the efficacy and safety of the chemotherapy.
按照加氢裂化拟一级反应机理，论述了建立四氢萘加氢裂化集总动力学模型的方法和步骤。
The method and the process to establish lumped kinetic model of tetralin hydrocracking have been discussed according to the mechanism of pseudo first order reaction.
通过使用一定配比的乙醇和四氢呋喃作混合溶剂，第一次培养出尿素和间甲酚的复合物单晶。
The complex crystal ofm-cresol and urea has been firstly cultivated by using a mixed solvent including ethanol and THF at a proper ratio.
聚合物分子在四氢呋喃稀溶液中的幂指数为0.14，说明该聚合物具有支化结构。
The power index was 0.14, which indicated that the polymer had branched molecular structure in dilute solution of tetrahydrofuran.
目的：研究四氢帕马汀对大鼠海马缺血再灌注损伤的保护作用。
Objective: To study the protective effects of tetrahydropalmatine against ischemia-reperfusion induced hippocamp lesion in rats.
目的：研究四氢帕马汀对大鼠海马缺血再灌注损伤的保护作用。
Objective: To study the protective effects of tetrahydropalmatine against ischemia-reperfusion induced hippocamp lesion in rats.
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