合成物

The synthesis and the antitumor activities of the analogs of the marine natural product Et-743 were studied.

本论文是关于海洋天然产物Et-743类似物的合成及抗肿瘤活性的研究。

Based on the analysis of structure-activity relationships of Linezolid analogues, four new compounds were designed and prepared.

在对利奈唑酮类似物构效关系进行分析的基础上，设计合成了四个未见文献报道的目标化合物。

To date over 1000 synthetic analogues have been prepared.

迄今已超过1000合成类似物准备。

In this thesis, a series of uliphatic polyester anhydrides 〓COCH〓CH〓COO 〓OCOCH〓CH〓COO〓 and copolyanhydrides with 1, 3-bis (4-carboxylphenyloxy) propane were prepared.

本文中合成了一系列脂肪族聚酯酸酐〓以及与1，3-双（4-羧基苯氧基）丙烷的共聚物，研究了它们的降解性能和药物释放性能。

The anterior section of arachnids and many crustaceans, consisting of the fused head and thorax.

头孢氨苄一种半人工合成的头孢菌素代用物，尤用于治疗呼吸道和尿道感染

The dark bands alternating with light bands,relatively stable and R-band-like structure was showed on the pachytene bivalents of Rics-field eelby using the random-primed in situ digoxigenin-labelled DNA synthesis technique,and the results were analysed and discussed in detail.

在黄鳝二价染色体上，运用地高辛配基标记的随机引物原位DNA合成技术诱导出了明暗相间、基本稳定且类似于R带的带状结构。本文对该结果进行了较详细的分析和讨论。

Chemical components and phase composition were determined by chemical and XRD analysis.Field-emission scanning electron microscope was employed to characterize the micro-morphologies and particle sizes of the six kinds of calcium borates.

根据化学分析和XRD分析数据确定了各种合成产物的化学组成、物相名称，用场发射扫描电镜对六种硼酸钙的显微形貌、颗粒大小进行了表征，发现它们的显微形貌、颗粒大小有很大的不同。

4 Kinds of methylthiazoline multithioether s were synthesized from the nucleophilic substitution of 5-methyl-thiazolidine-2-thione reacting with bromides,respectively.

通过5-甲基-2-噻唑烷硫酮与溴代物的亲核取代反应合成了四种甲基噻唑啉多头硫醚，利用红外光谱、核磁共振(1H NMR)光谱和元素分析对这四种化合物的结构进行了表征。

Several carbonates are synthesized from carbamates either with hydrochloride as coreactant or with zeolites as catalysts under low temperature and pressure, whereas high yield is achieved through either the formation of ammonium chloride as precipitate or the adsorption of ammonia in zeolites.

在较低温度和压力下，以氯化氢为共反应物或沸石分子筛为催化剂，由氨基甲酸酯与醇反应合成多种碳酸酯。

Objective: To investigate the feasibility of the synthesis of Ethyl-p-Nitrobenzoate catalysed by Hydrogen Peroxide. We study the effects of the actor mole ratio, catalyst dosage, reaction temperature, and reation time on the esterification rate.

目的：探讨双氧水催化合成对硝基苯甲酸乙酯的可行性，并考察了反应物的摩尔比、催化剂用量、反应温度及反应时间对产物收率的影响。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。