查询词典 major in

Results show that 4-oxo-β-ionone is the major product with yield of 53.5% under the conditions as follows: reaction temperature 45℃, reaction time 24 h, the molar ratio of n: n(NaClO3): n 20: 100: 3, and pH value of solution in 1-3; on the other hand, 5,6-epoxy-β-ionone is major product with yield of 25.4% when reaction temperature is 40℃, reaction time is 24 h, the molar ratio of n: n(NaClO3): n is 20: 120: 5, and pH values of solution is 3. The excessive β-ionone can be recovered by vacuum distillation for reusing again. 4-oxo-β-ionone and 5,6-epoxy-3-ionone were purified by recrystallization and silica gel column chromatograph respectively with the purity over 98%.

研究结果表明：氯酸钠氧化β-紫罗兰酮的反应主要生成4-氧代－β-紫罗兰酮和5，6-环氧－β-紫罗兰酮，经重结晶和硅胶柱层析分离，纯度高于98%；4-氧代－β-紫罗兰酮的有利合成条件是反应温度为45℃，反应时间为24h，溶液的pH值为1~3，反应物配比n：n(NaClO3)：n为20：100：3，最佳收率为53.5%；5，6-环氧－β-紫罗兰酮有利的合成条件是反应温度为40℃，反应时间为24h，溶液的pH值为3，反应物配比n：n(NaClO3)：n为20：120：5，其收率为25.4%；未反应的β-紫罗兰酮经减压蒸馏回收后可重复使用。

The effect and variation of major gene are estimated by the maximum likelihood method implemented via expectation-maximization algorithm. Major gene is tested with the likelihood ratio test statistic.

该方法以EM算法实现的极大似然估计方法进行主基因的效应估计，以似然比统计量进行主基因的各种遗传假设检验。

An annual herbal fibrous plant in Linum,is one of the three major fibre crops and the five major oil crops in the world.

为亚麻科亚麻属一年生草本纤维植物。

The gall-preserving lithotomy is a major event in China and also a major event in the twenty-first century.

微创保胆技术是中国的大事，是二十一世纪的大事。

Major projects supporting real estate cycle of songs this week, 18 sets of transactions, transaction area 1255.9 square meters, excluding major projects supporting the impact of housing, the actual domestic average price of 8611 yuan / square meter.

重大项目，支持房地产周期的歌曲这个星期， 18套的交易，交易面积一千二百五十五点九平方米，但不包括重大项目支持的影响，住房，实际国内平均价格八千六百十一元/平方米。

IF HE IS A REAL MAJOR,I MUST BE MAJOR GENERAL!

语录一：如果他能算得上少校的话，那我绝对是少将了。

I major in music. What's your major?

2我的主修专业是音乐，你的呢？

Major League Baseball is one of the major professional sports leagues in North America.

美国职棒大联盟是北美主要的职业运动联盟之一。

In the example,"All men are mortal" is the major premise, and since mortal is also the predicate of the conclusion, it is called the major term .

在这个例子中，"所有的人都是凡人"是大前提，因为凡人也是上游的结论，这是所谓的重大任期。

Almazo Line is established as a major transportation and forwarding presence in all major Mexican ports.

Almazo 线被建立如主要的运输而且正在所有的主要墨西哥人港口中转寄出现。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。