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The drying process of chrome liquor was studied. The structure andproperty of chrome complex reducing by alcohol were analysed and tokened by manypresent well-rounded separation and analysis methods such as IR, UV-Vis Spectrum,IEC and pH potentiometry. Application tests of chrome tanning agents wereconducted and tanning methods of tanning at high pH were studied. A systematic studywas conducted on high alkalinity chrome tanning agents application in leather makingprocess and possibility of clean chrome tanning was discussed.

本文系统地研究了多种小分子醇与重铬酸盐之间的氧化-还原反应,对反应过程进行了认真的剖析;对铬鞣液的干燥过程进行了研究;用红外光谱法、紫外及可见分光光度法、离子色谱法以及pH电位滴定法等多种比较成熟的现代分离分析方法相结合,对醇还原铬配合物的结构与性能进行了分析与表征;对铬鞣剂的鞣革性能进行了应用实验,研究了醇铬鞣剂在高pH值下的鞣制方法,并就高碱度铬鞣剂在制革过程中的应用进行了系统研究,探讨了用其实施清洁化铬鞣的可能性。

The molecular charge distribution of the reactivator is affect the reactivating efficacy directly. Moreover its association with hydroximic acid dissociation constant pAa closely, and it will have a great impact on reactivating ability indirectly.(3) There is likely to exist front molecular interaction between Cholinesterase Reactivators and OPC-inhibited AChE, the action sites mainly lie on the aromatic ring, the substitute R and the hydroixic acid group. They act on the aromatic residues of AChE by Π-Π conjugation .(4) The reached results by Comparative Molecular Field Analysis is useful to design new higher efficacy derivatives for 1, 2, 4-oxadiazole class nonquaternary Cholinesterase Reactivators.

2复能剂分子的电荷分布直接影响复活活性,同时对肟酸解离常数pKa具有重要影响,间接影响复活能力;(3)复能剂与磷酰化酶可能存在前线轨道作用,作用部位可能主要在芳香环及其取代基R和肟基上,与AchE的芳香族残基发生л-л电子作用;(4)通过比较分子力场法研究可以指导1,2,4-oxadiazole类非季铵肟胆碱酯酶重活化剂新化合物的合成,可能得到活性更高的复能剂。

Effects of the different accelerants(La and Ce nitrate,Na nitrate and Na molybdate) on phosphatization were discussed.

提出在表面生成磷化膜以提高不锈钢的耐磨与耐蚀性能的工艺方法,讨论了各种促进剂(亚硝酸钠、钼酸钠、硝酸铈和硝酸镧)对磷化膜形成的影响,探讨了稀土对磷化的影响机理。

The effects of the corrosive accelerator,acid ratio,phosphatizing temperature,phosphatizing time and the additives on zinc phosphatization of aluminum alloy were investigated.

以LY12铝合金为试样,讨论了腐蚀加速剂、酸比、磷化温度、磷化时间、磷化添加剂对铝合金磷化的影响,得出了相应的最佳工艺参数。

Therefore esterification crosslinked reactionbetween polyearboxylic acid and wood can be quantitatively determined.According toexperiment results of stereoscopic configuration choices by crosslinking agents,crosslinkingreaction between model of reaction intermediate and wood,and the intermediate characteristic incrosslinking reaction,crosslinking reaction intermediate was proofed.We can infercrosslinking reactions between polycarboxylicacid and wood want through a mechanism of twosteps reaction process,the first cyclic anhydrides were formed as intermediates by dehydratingbetween hydroxyls in polycarboxylic acids,second esters were occurred by substitution reactionbetween wood hydroxyls and cyclic anhydrides.

从而可全面定量表征木材与多元羧酸类化合物的酯化交联反应;依据交联剂立体构型选择性、反应中间体模型物与木材的交联反应和交联反应中间体的波谱特征实验结果,证实了交联反应中间体,因此可以推测:多元羧酸类化合物与木材化学组分的交联反应是经历两步反应的机理,首先多元羧酸中相邻羧基的羟基之间脱水形成五元环酸酐中间体,然后木材的羟基与酸酐发生亲核取代反应形成酯。

Water,butylene glycol,glycerin,glyceryl polymethacrylate,triethanolamine,carbomer,ppg-26-bueth-26,chondrus crispus,peg-40 hydrogenated castor oil,phenoxyethanol,imidazolidinyl urea,propylene glycol,benzophenone-4,retinyl palmitate,citrus aurantiudulcisoil,phospholipids,methylparaben,tocopheryl acetate,c12-23 alkyl lactate,disodium EDTA,centella asiatica extract,iris germanica root extract,pentadecalactone,aloe barbadensis leaf juice,mimosa tenuiflora bark extract,sodium hyaluronate,menthol,biosaccharide gum-1,citrus aurantium amara oil,propylparaben,methylchloroisothiazolinone,sodium benzoate,potassium sorbate,citric acid,calcium sorbate,methylisothiazolinone,butylparaben,ethylparaben,yellow 5(CI 19140),limonene,linalool

水,丁二醇,甘油,甘油聚甲基丙烯酸酯,三乙醇胺,卡波姆,PPG-26-丁醇聚醚-26,鹿角菜胶,PEG-40 氢化蓖麻油,苯氧乙醇,尿素醛,丙二醇,二苯酮-4,维他命A酯,甜橙油,磷脂质,羟苯甲酯,醋酸盐维他命E,C12-13 烷醇乳酸酯,乙二胺四乙基二钠,雷公根萃取,鸢尾花根萃取,环十五内酯,吉拉索芦荟叶汁,含羞草萃取,透明质酸钠,薄荷脑,多醣物质,苦橙油,羟苯丙酯,甲基氯异塞唑晽酮,苯甲酸钠,山梨酸钾,柠檬酸,山梨酸钙,甲基异噻唑啉酮,羟苯丁酯,羟苯乙酯,柠檬黄,柠檬精油,沈香醇水:几乎所有护肤品成分第一位都是水。丁二醇:保湿剂及溶剂,质地温和

The results showed that intermidiate 1, 2-propanediol-sebacate of low relative molecular mass was synthesized with toluene-p-sulfoinc acid as catalyst, benzene as watercarrying agent, and of mole ratio of sebacic acid to 1, 2-propanediol of 1:4. The glass-transition temperatures of PPSC were below 0 ℃ which confirmed that PPSC would be in a high-elastic state of ambient temperature and human body temperature. PPSC was a elastomer with moderate crosslinkage, low module and high elongation, and had rapid degradation ratio (degradation degree more than 50%) in phosphate (pH value 7.4) at 37℃.

结果表明,以对甲苯磺酸为催化剂、苯为带水剂,在酸醇比为1,4的条件下可合成较低相对分子质量的中间体癸二酸聚酯二元醇;PPSC弹性体的玻璃化转变温度在0℃以下,于室温及人体温度下处于高弹态;PPSC为适度交联的、低模量高伸长的弹性体,其在37℃、pH值为7.4的磷酸盆缓冲溶液中具有较快的降解性(降解度超过50%)。

The results show: in a specific concentration range, the solubility in neutral solution of SOL, as well as the surfactivity, the ability to reduce ITF and the wettability on the condition of non- alkali are better than the lignosulfonate in market.While using as sacrifice agent, the modified lignosulfonate can reduce 60% of the mahogany sulfonate and 50% of the α-alkene sulphonate which both are adsorbed on the oil sand surface.

结果表明在一定浓度范围内,SOL在中性溶液条件下的溶解性、在无碱条件下的表面活性、降界面张力能力、对岩石的润湿性效果优于市场木质素磺酸盐产品;作为牺牲剂使用时,改性磺化木质素能减少石油磺酸盐在油砂表面吸附的60%,减少α-烯烃磺酸盐在油砂表面上吸附的50%。

The synthetic process for a new plasticizer used in low temperature, dibutyl nylonic acid ester, was introduced.

介绍了一种新型耐寒增塑剂尼龙酸二正丁酯的合成工艺,用价廉、易得的尼龙酸(由制己二酸母液中获得的C4~C6混合二元酸)及正丁醇为原料,浓硫酸为催化剂,经酯化、脱醇、中和、沉降及减压蒸馏等工序而制得产品。

Dibutyl malate was synthesized from malic acid and butyl alcohol used solid superacid SO42-/TiO2 as catalyst.

以固体超强酸SO42-/TiO2为催化剂,以苹果酸和正丁醇为原料催化合成苹果酸二丁酯,并探讨了酸醇比、催化剂的用量、反应时间、带水剂等因素对酯化反应的影响。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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