合成物质

In this study, the amount of ethylene and its key biosynthesis genes expression, typical allelochemical hydroxamic acid concentration and the key regulation genes (BX1 and BX9), as well as the dynamic expression and time of relevant defense key genes of secondary substance metabolism processes were compared in ethephon treatments of different concentration and duration.

为探明外源乙烯利对玉米化学防御作用诱导的浓度和时间效应，本文采用化学和分子生物学相结合的方法，研究了不同浓度乙烯利处理玉米后，叶片乙烯释放量及其合成调控关键基因ACS和ACO表达的变化，典型化感物质丁布的含量及其关键调控基因BX1和BX9表达的变化，以及其他调控次生代谢物的关键基因表达的时间动态。

The effects of different factors on cell growth and flavonoids production of S. involucrate were systematically studied including the media, initial pH values of the medium, carbon sources, inoculum quantity, and plant growth substance.

研究不同培养基、培养基初始pH、碳源、接种量、植物生长物质含量对雪莲细胞生长和黄酮合成的影响。

Isoamyl isovalerate was synthesized through esterification reaction by using isovaleric acid and isoamyl alcohol as raw materials and nano-H4SiW12O40/SiO2 as catalyst, the influencing factors in the reaction were studied, and the results showed that the esterification rate could reach 98.6 % under the conditions of the ratio of alcohol-acid 1.4∶1, the use level of catalyst 5 %, and the reaction time 1.5 h.

以纳米复合钨硅杂多酸为催化剂，异戊酸和异戊醇为原料，通过酯化反应合成苹果油，对酯化反应的影响因素进行了研究，结果表明，在醇酸物质的量比为1.4∶1，催化剂用量5%，反应时间1.5h的条件下，酯化率可达98.6%。

H3PW6Mo6O40/TiO2 was used as the catalyst in the synthesis of cyclohexanone ethylene ketal. The effects of varying the n:n ratio, catalyst dosage and reaction time on the yield were investigated.

以H3PW6Mo6O40/TiO2为催化剂，对以环己酮与乙二醇为原料合成环己酮乙二醇缩酮的反应条件进行了研究，较系统地研究了酮醇物质的量比、催化剂用量、反应时间对收率的影响。

Cyclohexanone ethylene ketal was synthesized from cyclohexanone and glycol in the presence of H3PW12O40/MCM-48. The factors influencing the synthesis of molar ratio of glycol to cyclohexanone, the quantity of catalyst and the reaction time were discussed and the best conditions were found out.

报道了以分子筛MCM-48负载磷钨酸(H3PW12O40/MCM-48)为催化剂，通过环己酮和乙二醇反应合成了环己嗣乙二醇缩酮，探讨了H3PW12O40/MCM-48对缩峒反应的催化活性，较系统地研究了酗醇物质的量比，催化剂用量，反应时间诸因素对产品收率的影响。

Insect alkaline phosphatases are distributed in such insect organs and tissues as head, salivary gland, intestine, Malpighian tube cuticule, haemolymph, fat body, reproductive system and appendage. They may be involved in the process of insect development, nerve conduction, hormone synthesis, substance metabolism and diapause, and caste formation in social insects, etc.

碱性磷酸酶存在于昆虫的头、唾液腺、肠道、马氏管、表皮、血淋巴、脂肪体、生殖系统、附肢等部位，广泛参与了昆虫的发育、神经传导、激素合成、物质代谢、滞育、社会型昆虫亚种形成等过程。

The cells are plump rods or cocci, surrounded by slime. A multilayered wall may be synthesized around the cell to produce a microcyst resistant to desiccation.

细胞被粘性物质包围，围绕细胞有多层的细胞壁被合成，可以产生小红细胞用来抵抗干燥。

The optimal charge ratio of reverse microemulsions and the necessary conditions of reverse microemulsion-gel systemwere investigated in Span-80,Tween-80/cyclohexane/water water-in-oil microemulsions and the formation conditions of the molybdic oxide/silica complex gel were studied in non-microemulsion.

研究了反相微乳体系中各物质的最佳配比和非微乳环境下凝胶和微乳-凝胶形成的条件，合成了高度分散、形貌可控的氧化钼/二氧化硅(MoO3/SiO2)纳米复合氧化物，系统考察了反相微乳-凝胶体系(microemulsion-gel system，MGS)的后处理方式、陈化时间和水相含量。

Besides, it is consistent with the asymmetrical gene flow from monogynous to polygynous populations through males in monogyne..Therefore, the cuticular chemicals can not be cluster well between monogynous and polygynous ants, and the variance of chemicals of the latter is higher than those of the former.

由於这些化学物质的合成受到遗传影响，这种现象显示两个涵义，第一个是单蚁后社会型的工蚁对其他蚁后有强烈的排他性而造成的选汰压力导致其遗传结构上较为均质，另一个涵义显示单蚁后社会型的遗传组成可藉由雄蚁将其基因带入多蚁后社会型的遗传组成，但反之则不然；因此二者之间无法分群，且后者的遗传变异较前者为大。

Finally, in multinuclear macrocyclic polyamine derivatives, we found that cyclen-based oligomers form polymer complex with DNA, thus protect DNA from enzymatic degradation efficiently.

在多核大环多胺方面，我们合成了基于大环多胺的寡聚物，研究发现该类物质可与DNA形成复合物，从而有效地保护DNA免于酶解。

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