对苯二酚

Results showed that reaction temperature has little effect on the molar ratio of catechol to hydroquinone and reactive period of catalyst.

试验结果表明，反应温度对反应产物中邻苯二酚/对苯二酚的比例和催化剂的活性周期的影响不明显，过氧化氢/苯酚摩尔比对邻苯二酚/对苯二酚的比例的影响较大，提高过氧化氢/苯酚摩尔比会降低邻苯二酚/对苯二酚的比例，缩短催化剂的活性周期。

The linear ranges of determination for pyrogallol, phloroglucinol, pyrocatechol, resorcinol and parodioxybenzene were 1.0×10〓～2.0 ×10〓mol l〓, 1.0×10〓～1.0×10〓mol l〓, 1.0×10〓～6.0×10〓mol l〓, 1.0 ×10〓～2.0×10〓mol l〓 and 1.0×10〓～6.0×10〓mol l〓 respectively, and their detection limits were 7.2×10〓mol l〓, 6.8×10〓mol l-1, 2.1 × 10〓mol l〓, 7.1×10〓 mol l〓 and 2.2×10〓mol l〓 respectively.

该方法测定连苯三酚、间苯三酚、邻苯二酚、间苯二酚和对苯二酚的线性范围分别为1.0×10〓～2.0×10〓mol l〓，1.0×10〓～1.0×10〓 mol l〓，1.0×10〓～6.0×10〓mol l〓，1.0×10〓～2.0×10〓mol l〓和1.0×10〓～6.0×10〓mol l〓；检出限分别为7.2×10〓mol l〓、6.8×10〓 mol l〓、2.1×10〓 mol l〓、7.1×10〓mol l〓和2.2×10〓mol l〓。

The total synthese three natural compounds to explore enantioselective synthesis of flavanol: We use phloroglucin and 2, 4, 6-trihydroxyacetophone as starting materials to synthesis distenin in two ways; Resorcin was used to synthsis 2, 5-dimethoxymethoxyacetophone though 3 steps.

对黄烷醇化合物的立体选择性全合成进行了探索：以间苯三酚和2，4，6-三羟基苯乙酮为原料，尝试用两条路线对Distenin化合物进行了全合成研究；以对苯二酚为原料，经三步制得2，5-二甲氧甲氧基苯乙酮，与2，4，6-三甲氧甲氧基苯甲醛反应，经四步反应得到天然产物3，5，7，2′，5′-二五羟基黄烷关键中间体1-（2′，6′-二甲氧甲氧基苯）-3-（2"，4"，6-三甲氧甲氧基苯）丙烷-1R，2R-二醇83及其对映体84；简要介绍了EGCg类化合物的生物活性和研究概况。

Analysis of the treated aqueous solution was conducted with GC-MS,and the main intermediates during phenol degradation were isobutyric acid,malonic acid,benzoquinone,butenoic acid,oxalic acid,maleic acid,succinic acid,hydroquinone,catechol and resorcin.

利用GC-MS分析了苯酚降解主要中间产物为异丁酸、丙二酸、对苯醌、丁烯酸、乙二酸、顺丁烯二酸、丁二酸、邻苯二酚、对苯二酚及间苯二酚等，并据此推测了苯酚电催化氧化的可能反应途径。

Four kinds of aromatic ether-linked dinitriles with low melting temperatures were obtained via the nucleophilic substitution of hydroquinone, resorcinol, biphenol and bisphenol A with CBN. They were polymerized to afford a series of poly(pheny-s-triazine)s under the optimized conditions.

以对苯二酚、间苯二酚和联苯二酚为原料，分别与对氯苯腈进行亲核取代反应，合成了三种较低熔点的含醚键二腈，并分别研究了其在优化条件下的聚合反应。

A series of sulfonated poly(arylene thioether/ether phosphine oxide)s was prepared by direct polycondensation of sBFPPO and BFPPO with the diphenol-type or dimercapto-type monomers such as hydroquinone, bisphenol-A, 4,4'-biphenol, 4,4'-diphenol (6F), 1,5-dihydroxynaphthalene, 4,4'-dihydroxybiphenyl, and 4,4'-thiobisbenzenethiol, respectively.

将BFPPO与sBFPPO分别与多种二羟基或二巯基单体，如对苯二酚、双酚A、4，4'-二苯酚、双酚F、1，5'-二羟基萘、4， 4'-二羟基二苯硫醚和4，4'-二巯基二苯硫醚，直接共聚制备了一系列磺化聚芳醚三苯基氧膦，侧重考察了二羟基和二巯基单体结构单元对产物的耐氧化性能的影响。

Twelve regular copolyesters were synthesized by solution polycondensations of the four monomers with hydroquinone, chlorohydroquinone, 4,4'-dihydroxy biphenyl. The copolyesters were characterized by polarized microscope with hot stage, DSC and X-ray diffraction.

将上述单体与对苯二酚、氯代对苯二酚以及联苯二酚用溶液缩聚的方法合成了十二种规则共聚酯，并用热台偏光显微镜、DSC、X-衍射等方法对共聚酯进行了表征。

Microcalorimetry was applied to follow the toxic effects caused by different diphenol compounds on microbial activity of Chinese fir soil.

用微量量热技术分析了三种二酚类化合物(邻苯二酚、间苯二酚、对苯二酚)对土壤微生物活性的毒性作用。

Organic: dihydroxybenzene, oxalic acid, hydroquinone, fumaric acid, gulonic acid, o-dihydroxybenzne; m-dihydroxybenzene; coke powder, tartaric acid, cyanuric acid, G salt, R salt.

有机物：苯二酚、草酸、对苯二酚、富马酸、古龙酸、邻苯二酚、间苯二酚、焦炭粉、酒石酸、氰尿酸、 G 盐、 R 盐。

The total synthese three natural compounds to explore enantioselective synthesis of flavanol: We use phloroglucin and 2, 4, 6-trihydroxyacetophone as starting materials to synthesis distenin in two ways; Resorcin was used to synthsis 2, 5-dimethoxymethoxyacetophone though 3 steps.

对黄烷醇化合物的立体选择性全合成进行了探索：以间苯三酚和2，4，6-三羟基苯乙酮为原料，尝试用两条路线对Distenin化合物进行了全合成研究；以对苯二酚为原料，经三步制得2，5-二甲氧甲氧基苯乙酮，与2，4，6-三甲氧甲氧基苯甲醛反应，经四步反应得到天然产物3，5，7，2′，5′-二五羟基黄烷关键中间体1-（2′，6′-二甲氧甲氧基苯）-3-（2&，4&，6-三甲氧甲氧基苯）丙烷-1R，2R-二醇83及其对映体84；简要介绍了EGCg类化合物的生物活性和研究概况。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷