衍生物

These are main problems of eutrophication.In this paper we selected alga that suits to grow under different concentration of nutrition, after selecting seed, domesticating, culturing alga purely in the lab, we gained Hydrodictyon reticulatum and microalga, most of which are Miorocystis and chlorella.

本文选取在不同营养水平条件下适合生长的藻类物种，在实验室进行选种、驯化和纯化培养，得到水网藻和微藻(主要为微囊藻Miorocystis、小球藻chlorella)；以实验室培养的生长速度快、生产能力高的水网藻为原料，制备一系列环境友好性光敏物质——叶绿素及其衍生物，运用光敏氧化分光光度法测定活性氧(O_2~-，H_2O_2，·OH，和~1O_2)，根据其光敏产生活性氧效率，进行光敏物质的筛选；选用叶绿素铜及其钠盐，以微藻为实验控制对象，以Cu~(2+)作培养对照，在相同光照、营养条件下进行控藻实验。

The process does not depends on catalytic hydrogenization method, has simple reaction condition, high reactant yield all over 75%, can use TLC to track the whole reaction process, and is more suitable to the transformation of function group in the organic synthesis field as the result of N-Boc or N-Cbz derivative is easy to loss protective reaction, which has spreading application prospect.

该方法不依赖于催化氢化方法，反应条件简单，反应产物产率高，均在75％以上，反应过程可用TLC进行跟踪，且由于N-Boc或N-Cbz衍生物更易发生去保护反应，在有机合成领域更适宜于官能团的转化，具有广阔的应用前景。

Hydrophobic modification of starch and its derivatives is an effective method to improve and extend the application properties of starch chemicals.

淀粉及其衍生物的疏水化改性是改善和拓展淀粉化学品应用性能的有效途径之一。

After 21 hours of reperfusion the size of cerebral infarction and the hydrous content of brain and MPO activity were determined.

异亚丙基莽草酸是从木兰科植物八角茴香中提取的有效成分莽草酸的合成衍生物。

The present invention relates to a novel class of hydroxamic acid derivatives.

本发明涉及一类新的异羟肟酸衍生物。

According to the structure-activity relationships of actinonin and the theory that drug binds with acceptor, we designed and synthesized three series of novel hydroxamic acid derivatives in which the isoxazole ring were contained. Their structures have been confirmed by 1HNMR, MS and other analytic methods.

本文就是以天然放线菌素为先导化合物，根据放线菌素的构效关系和与PDF受体结合的原理，以易得的氨基酸为起始化合物，采用了不同的合成路线设计合成了三类新的含有异噁唑杂环的异羟肟酸衍生物，并通过1HNMR，MS及其他分析方法验证了它们的结构。

Chiral β-hydroxy acids are key intermidiates in chemical industry and organic synthesis.

手性β-羟基酸及其衍生物是应用化工和有机合成的关键中间体。

1Five novel E-(4-β-D-allopyranosyloxyphenyl)-1-(4-substituted phenyl) propenone derivatives were designed and synthesized by the Claisen-Schimidt reaction with 4-substituted hypnone.

1与4-取代苯乙酮进行Claisen-Schimidt缩合，合成了五个未见文献报道的E-4-β-D-吡喃阿洛糖苷-苯乙烯基-4-取代苯酮衍生物。

Isoflavone; imidazole; imidazolyl isoflavone derivatives; microwave-mediated synthesis; antioxidative activity

工程科技I，化学，有机化学异黄酮；咪唑；咪唑基异黄酮衍生物；微波合成；抗氧化活性

It was found that the more easily systhesized and stable N, N-acetal or N, Ohemiacetal can replace N-tosyl imino ester to react with phenols in the presence of TiCl〓, and α-arylglycine derivatives were also obtained in high yields and high regioselectivity.

进一步研究发现，更易合成的N，N-或N，O-缩醛可以作为亚胺酯的替代物和酚类化合物发生傅克反应。路易酸TiCl〓能有效地促进酚类化合物和亚胺酯的傅克反应较高产率、较高区域选择性的得到2-羟基α-芳香甘氨酸衍生物。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。