查询词典 chalcone

For the synthesis reaction of chalcone, cyclohexanone aldolization and biodiesel,γ-Al_2O_3-NaOH-Na solid superacid has a satisfactory catalytic activity. With hypnone and phenylaldehyde as raw material, amount of catalyst 7.5% wt% of material, mole ratio of hypnone and phenylaldehyde 1:1.1, reaction temperature 40℃, after 3 hours, the yield of chalcone can be up to 96.88%. With cyclohexanone as raw material, amount of catalyst 10% wt% of material, reaction temperature 190℃, after 3 hours, dimmer of cyclohexanone can be up to 85.66%.

将该固体超强碱催化剂应用于查尔酮、环己酮自缩合以及生物柴油的合成反应中，该改性固体超强碱催化剂表现出了良好的催化活性：以苯乙酮和苯甲醛为原料，反应温度为40℃，催化剂用量为反应物总质量的7.5％，苯甲醛与苯乙酮摩尔比为1：1.1，反应3h查尔酮产率可达96.88％；以环已酮为原料，催化剂用量为原料总质量的10％，反应温度为190℃，反应3h，二聚物的总收率可达85.66％；以动物油和甲醇为原料，醇油摩尔为9：1，催化剂用量为动物油质量的2％，反应温度为70℃，反应3h后，生物柴油的收率可达91.8％。

Chalcone Synthase is a key enzyme in the biosynthesis of all classes of flavonoids.

查尔酮合酶(Chalcone synthase，CHS)是类黄酮合成途径中的一个关键酶。

In this article,we reviewed the role of chalcone synthase in phenylpropanoids pathway and its progress in expression pattern,function characters and evolution of chalcone synthase genes.

现对查尔酮合成酶在苯丙氨酸代谢途径中的地位、基因表达特性、基因功能以及基因进化等方面的进展做一介绍。

The Chalcone synthase gene is the focus gene in the studies of directional modification of flower color by transgenic technology.

查尔酮合酶(Chalcone synthase，CHS)是花色素合成途径中的一个关键酶，它在植物中表达的量可能影响花的颜色。

ABSTRACT Chalcone synthase is a key enzyme in the biosynthetic pathway of flavonoids.

查尔酮合酶(Chalcone Synthase，CHS)是类黄酮物质生物合成途径的关键酶。

It provides a new approach for preparing a-nitro chalcone derivatives directly from chalcone derivatives using NO.

因此，当β位连有芳环时，反应可以很好地发生。

Chalcone synthase (CHS, EC 2. 3.1. 74), is the first key enzyme in the biosynthesis of plant flavonoids, and the key enzyme of plant secondary metabolism. It has great influence on plant physiological function.

查尔酮合成酶(chalcone synthase，CHS，EC 2.3.1.74)，是植物类黄酮物质合成途径中的第一个酶，也是植物次生代谢途径中的关键酶之一，对植物具有非常重要的生理意义。

Chrysanthemum is one of the most famous ornamental plants and has a long history of culture in China.Ground-cover chrysanthemum plays an important role in landscape. We had introduced chalcone synthase gene into "Mei Ai Huang".an excellent cultivar of chrysanthemum.

菊花(Dendranthema×grandiflorum kitam)是我国十大传统名花之一，具有悠久的栽培历史，其中的地被菊在园林绿化中发挥着重要的作用，本课题组已将与花色代谢有关的查尔酮合成酶基因(chalcone synthase，CHS)转入优良的地被菊品种'美矮黄'中。

In recent years, the new technology has been used in the synthesis of chalcone compounds, under the 343 K condition carrying on the response in the temperature. It takes benzaldehyde and acetophenone as raw material, BF4 as resolver and the hydrotalcite as the catalyst, the yield of chalcone can reach 98.5%. This method has some advantages including shorter reaction time, higher yield and simpler operation.

近年来查尔酮化合物的合成采用了新技术，是以苯甲醛和苯乙酮为原料，BF4作为反应溶剂，水滑石为催化剂，在温度为343 K的条件下进行反应，查尔酮产率可以达到98.5%，该法具有反应时间短、操作简便、收率高等优点。

The results show that the as-synthesized chalcone-containing copolymers are a kind of thermosensitive polymer with a lower critic solution temperature and the LCST of the copolymer decreases with the increase of the chalcone content in the copolymer. With the increase of the solvent polarity, both the maximum absorption wavelength and the fluorescence emitting wavelength of the chalcone-containing copolymers redshifts, and the intensity of fluorescence first increases, then decreases, which exhibits solvent polarity sensitive fluorescence properties.

结果表明，侧链查尔酮共聚物是一类具有低临界溶解温度的温敏性聚合物，其LCST温度随着共聚物中查尔酮含量的增加而降低；随着溶剂极性的增加，侧链查尔酮共聚物的紫外-可见最大吸收波长红移，其荧光发光波长红移并且发光强度先增强后降低，具有溶剂极性敏感的荧光特性；同时对比侧链查尔酮共聚物水溶液低温和高温下的荧光，发现低温下几乎无荧光，高温下其荧光得到明显增强，其荧光具有可逆的温度&开/关&特性。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。