酚

Urushiol can be used as the basic raw material to develop economic and practical coating with good resistance to high temperature alkaline solution. Thus the polymer precursor was prepared using the polymerization of urushiol and formaldehyde. Then the urushiol-titanium chelate polymer (urushiol-Ti resin) was synthesized by way of the reaction of tetrabutyl titanate with the polymer precursor. The prospective target product was analyzed by means of high-performance liquid chromatography and Fourier transformation infrared spectroscopy.

为开发经济实用的耐高温碱水漆酚钛清漆，以漆酚为基本原料，先通过漆酚与甲醛缩聚，再将钛酸丁酯与前期合成产物反应，从而合成出了漆酚－钛螯合高聚物，并通过高效液相色谱和傅立叶红外技术检测了预期产物的合成情况。

It was found that the alkoxy of the aluminium alkoxide can be exchanged to the arkoxy of the raw material or product in the process of reaction. The alcohol producing in the exchange reaction reduces the yield of furan phenol by the further by-reaction of the alcohol with the raw material or product.

结果表明，醇铝在催化单醚合成呋喃酚过程中，醇铝中的烷氧基与原料单醚和产物呋喃酚的芳氧基发生了交换，交换生成的醇与单醚或呋喃酚发生副反应降低了呋喃酚收率。

Solid mixtures comprising a variety of high melting bisphenols; 4,4'-biphenol; 3,3,3,3'tetramethylspirobiindanbisphenol, and 4,4'-sulfonydiphenol are converted to stable, homogeneousmelt solutions at 200 DEG C, a temperature substantially below the melting points of the high melting bisphenols in their pure states.

在200℃下，基本低于纯态高熔点双酚的熔点的温度，将含有各种高熔点双酚；4，4′-二酚；3，3，3，3′四甲基螺二茚满双酚，和4，4′-磺酰联苯酚的固体混合物转化为稳定、均质的熔体溶液。

Fifty children undergoing arm operation were randomly divided into two groups:After ketamine based anesthesia,Plexus brachialis nerves block combined with ketamine propofol intravenous anesthesia(group A, n=25), 0.25％ropivacaine 0.5ml/kg was injected to plexus brachialis,ketamine propofol was injected intravenous connected during the operation;Ketamine propofol intravenous anesthesia(group B,n=25),ketamine propofol was injected intravenous connected.

50例行上肢手术患儿随机分为两组：氯胺酮基础麻醉后，臂丛神经阻滞复合氯胺酮－丙泊酚静脉麻醉组(A组，n=25)，臂丛阻滞成功后注入0.25％罗哌卡因 0.5ml/kg，术中以氯胺酮－丙泊酚持续静注；单纯氯胺酮－丙泊酚静脉麻醉组(B组，n=25)，术中氯胺酮－丙泊酚持续静注。

The super acid SO〓/ZrO〓, due to its strong acidity, favores the dealkylation and disproportionatin of 4-TBC or/and DTBC, preventing the increase of the selectivity for 4-TBC.

而固体超强酸SO〓/ZrO〓由于酸性较强，易于发生4-叔丁基邻苯二酚和3，5-二叔丁基邻苯二酚的脱烷基反应和4-叔丁基邻苯二酚的歧化反应，因此不利于提高4-叔丁基邻苯二酚的产率。

The Schiff base transitional metal complexes of various structures and their metallomicelles as peroxidase models for the phenol and phenolic derivant oxidation have been investigated. Some results are obtained from the studies:(1) the Schiff base transitional metal complexes have high catalytic activity for the phenol and phenolic derivant oxidation, and the structure of the complexes has a great effect on its catalytic activity;(2)a novel kinetic mathematical model for the complexes and their metallomicelles catalyzing the phenolic derivant oxidation has been established;(3) the feasibility and mechanism for the phenolic derivant oxidation catalyzed by the metallomicelle(as the mimetic model of peroxidase)have been discussed.

研究了冠醚Schiff碱金属配合物作为过氧化物酶的模拟模型对酚类物质氧化反应的催化作用，取得如下结果：(1)几种冠醚Schiff碱金属配合物对催化酚类物质氧化具有良好的催化活性，其中配体结构对其催化活性有较大的影响；(2)建立了金属配合物与表面活性剂形成的金属胶束催化酚类物质氧化反应的动力学数学模型；(3)探讨了金属胶束模拟过氧化物酶催化酚类氧化反应的可行性及其机理。

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。

spectrophotometric method with phenol disulfonic acid ; ultraviolet spectrophotometer ; nitrate nitrogen ; comparison

本文通过对常用的酚二磺酸光度法和紫外分光光度法进行实验比对，同时调查云南省内两种分析方法考核的情况，从而找出两种方法的优缺点，供分析人员在实践中借鉴。l原理1.1酚二磺酸光度法测定的原理方法依据：GB7480一87《水质硝酸盐氮的测定酚二磺酸分光光度法》。用浓硫酸与苯酚作用生成酚二磺酸

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。

Comparative studies of electroactive components and voltammetric behaviors different between the MCF-7 cell without estrogen and the MCF-7 cell with estrogen showed that the concentration of the guanine and xanthine bases in the cytoplasm decreased, which resulted in the decrease of secretion ability of the MCF-7 cell without estrogen decreased, and these result in the decreasing of the voltammetric response of the cells, impling that the cell vaibility decreases.

结果发现，去激素MCF-7细胞质中的黄嘌呤和鸟嘌呤浓度降低，使细胞分泌黄嘌呤和鸟嘌呤能力降低，导致细胞和细胞质的伏安信号减弱，说明去激素MCF-7细胞的活性下降；研究了标准雌激素雌二醇、环境雌激素壬基酚和双酚A对去激素培养的MCF-7细胞增殖的影响，发现其均存在剂量-效应关系和时间-效应关系，并且雌激素效应由大到小的顺序为：雌二醇＞壬基酚＞双酚A；同时使用3-(4，5-Dimethylthiazol-2-yl)-2，5-diphenyltetrazolium bromide法验证了电化学法评价雌激素效应的可靠性。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。