二羟基苯

DMBQ, resorcin, ferulic acid, and hydroxybenzoic acid were effective chemical signal substances in the inducement of haustorium, but the haustorium formation rate was only 3.3%.

适当浓度的2，6-二甲氧基对苯醌、间苯二酚、阿魏酸和对羟基苯甲酸均可诱导肉苁蓉种子萌发形成吸器，吸器形成率最高为3.3%。

There six chapters in this dissertation: the overview on the study of probing for reactive oxygen species, spin-labelled fluorophore as probe for free radicals, Fe -EDTA chelate-induced aromatic hydroxylation of terephthalate as a new method for the evaluation of hydroxyl radical-scavenging ability, study of fluorimetric method for the determination of peroxynitrite, study of spiro-formed rhodamine B hydrazide as a novel fluorescent probe in analytical chemistry, the conclusion and prospect of the present research work.

本论文分六章，包括生物活性氧表征的研究进展、自旋标记荧光探针表征自由基的研究、利用Fe-EDTA引发对苯二甲酸芳环羟基化反应评价抗氧化剂清除羟基自由基能力的研究、荧光法表征过氧亚硝酸根的研究、螺环型罗丹明B酰肼化合物作为新型荧光探针的性质及应用的研究、结论与展望。

This article through the belt hydroxyl aldehyde class material and the chloroacetic acid response, the synthesis intermediate, then with the neighbouring phenylene diamine responded again synthesized 6 kind of benziminazole class compound, including 4 kinds not to report.

本文通过带羟基的醛类物质和氯乙酸的反应，合成中间体，然后再与邻苯二胺反应合成了6种苯并咪唑类化合物，其中有4种还未被报道。

Benzyl bromide was synthesized from potassium bromide ,a by-product from synthesis of 2-hydroxy-4-n-octyloxybenzophenone(UV-531),and benzoic alcohol in the presence of concentrated sulfuric acid.

溴化钾作为工业生产2-羟基-4-正辛氧基二苯甲酮的副产品，在浓硫酸存在的条件下，与苯甲醇进行反应合成苄基溴。

The result indicates thato-PD is converted to one trimer with ca.

羟基自由基抑制剂和氧合血红素物种抑制剂尿酸都不抑制该氧化反应，这些结果表明邻苯二胺的羟基化反应没有包括在其氧化过程中。

The results showed that there were 8 kinds of aliphatic, 5 kinds of esters, 2 kinds of aldehydes, 2 kinds of nitrogen sulfur heterocyclic rings and one kind of hydrocarbon, alcoholics, ketone, lactones respectively in the analyzed 21 kinds of aroma components, and the content of furfural,β-methyl valeric acid, palmitic acid, nicotine, neohytadiene were higher, next were acetyl ethyl propionate, caleric acid, phenyl ethyl acetate, hydroxylic diethyl succinate.

结果表明，在分析出的21种香气成分中，分别有脂肪酸类8种，酯类5种，醛类2种，氮硫杂环类2种，烃类、醇类、酮类、内酯类各l种，其中相对含量较高的物质成分是糠醛、β-甲基戊酸、十六碳酸、烟碱、新植二烯，其次是乙酰丙酸乙酯、异戊酸、苯乙酸乙酯、羟基丁二酸二乙酯等。

Then,the core molecule was used as a coupling agent to condensate with polyethylene glycolsof different molecular weight or polyethylene glycol monomethyl etherin the presence of stannous octoate as catalyst and diphenyl ether as azeotropic agent to remove water.

在辛酸亚锡催化下，以二苯醚为共沸脱水剂，将三官能度小分子TMP-SK3作为偶联剂，进一步与不同分子量的端羟基聚乙二醇和聚乙二醇单甲醚缩合，减压下共沸脱水，制备了以TMP-SK3为核，PEG或PEGm为臂的三臂星形大分子。

The other type of trimeric product containing 2 ferrocene units has also been synthesized. Its 13C NMR anal.

通过混合三聚反应，也合成了另一类含两个二茂铁化合物， N，N'-二-2-羟基-5-特丁基苯甲二胺。

Feeding for 24h by third instar larvae of the maize stalk borer induced farnesyl pyrophosphate synthase gene expressing, but had no effect on expression of AOC, BX9, PAL and PR2a genes and DIMBOA content.

3玉米螟3龄幼虫处理24h能诱导玉米根中法呢烯基焦磷酸合成酶基因表达，但不能诱导丙二烯氧化物环化酶、β－1，3葡聚糖酶基因（PR2a）、糖基转移酶（BX9）、苯丙氨酸转氨酶基因表达，同时对第二叶和根中丁布含量无显著影响，使第二叶对羟基苯甲酸及第三叶丁布、对羟基苯甲酸、香草酸含量显著降低。

This research utilized the method of organic synthesis, researching different amounts and positions of hydroxy-substituted benzoic acid and serotonin into amide reaction, so as to produce a series of polyhydroxy substituted N-benzoylserotonin derivatives (compound 1-10). Accordingly, this study conducts the following four tests. I. The activity of antioxidant and the experiment of ability to scavenge DPPH free radical, II. The ability of overall antioxidant—the activity of TEAC, III. The activity test of inhibit Tyrosinase, and IV. The study of absorbing UV / VIS Spectrophotometers. This study use trolox, arbutin, and octyl salicylate as the control groups, and to test the ability of anti-oxidation, the activity of inhibit Tyrosinase, and the ability of absorbing UV. This research ultimately intends to investigate the applied value of those compounds into cosmetics.

本研究主要利用有机合成的方法，将不同数量及不同位置的羟基取代苯甲酸化合物与色洛冬宁进行醯胺化反应后，得到一系列的多羟基取代之N-色洛冬宁苯甲醯胺衍生物（化合物1 ~ 10），进行四种不同活性测试方法：一、清除DPPH自由基能力抗氧化活性测试；二、总抗氧化能力活性测试；三、抑制酪胺酸酶活性美白测试；四、紫外线／可见光光谱仪吸收测试，并以水溶性维生素E、熊果素、水杨酸辛酯当作对照组，探讨其抗氧化能力、抑制酪胺酸酶的活性能力与吸收紫外线能力，再进一步探讨其应用於化妆品上的价值。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐