纸色谱法分离鉴定黑米色素中的组分

以市售的紫香糯、岩黑稻为原料，制成黑米色素，以BAW(正丁醇：冰醋酸：水=4：1：5)，BuHC1(正丁醇：2．0mol L^-1HC1=1：1)，HOAc—HC1(冰醋酸：浓盐酸：水=15：3：8)，HOOCH—HC1(甲酸：浓盐酸：水=5：2：3)，1％HC1为展层剂，探讨了纸色谱法用着分析黑米色素组分的分离条件。     

复配辛硫醚一灭多威配方研究

本文研究防治棉铃虫的高效农药，即辛硫醚一灭多威复配农药，得出最佳配方辛硫磷：灭多威：甲醇：二甲苯：乳化剂：增效剂为20：15：30：25：8：2（质量比），按此配方制得的乳液稳定性好，药效显著提高，且成本较低。     

天下塑业

印度：禁止进口塑料边角料，欧盟：植物型增塑剂上市，加拿大：包装品生产商需支付回收费，北美：颁布玻璃密封材料标准，欧洲：推出密封胶条统一标准，澳大利亚：2008年全画停用塑料袋，……     

中国拟建项目信息

项目：张湾截污工程，项目：大港区海水淡化（一期）工程，项目：望城污水处理厂项目，项目：污水回用项目，项目：城市污水处理厂项目，……[编者按]     

卫生用农药的CIPAC分析方法

本文摘译自国际农药分析协作委员（CIPAC）的部分卫生用农药原药和制剂的分析方法，供读者参考。 1 右旋烯丙菊酯（d．allthrin，742） 右旋烯丙菊酯是混合物，其中1R-trans，R：1R-trans，S：IR．cis，R：IR．cis：S=4：4：1：1：1，且反式异构体75％-85％，顺式异构体15%-25％。     

相转移催化合成苯甲醇的工艺研究

以氯化苄、碳酸钙为主要原料，在相转移催化剂的作用下水解得到苯甲醇，通过单因素实验，得到优化的工艺条件为：氯化苄：碳酸钙：水：催化剂（质量比）=1：1：5．2：0．02，反应温度：100℃，反应时间：12h，其收率可达94．4％，产品经气相色谱定量分析，纯度可达到99．3％。     

碘化钠催化合成1,4-二乙氧基苯的研究

以乙醇为溶剂，碘化钠为催化剂，由金属钠，对苯二酚和溴乙烷合成了1，4－二乙氧基苯，考察了影响收率的因素，最佳合成条件为：物料溴乙烷：对苯二酚：金属钠：碘化钠（摩尔比）为2．5：1：2．2：0．13，反应在回流温度下进行，反应时间2h，收率可达92．8％。     

N-甲基-2-甲基-5-甲氧基-4-氨基苯磺酰胺的合成

本文以5-甲基-2-甲氧基苯胺（克立西汀）为原料通过N-酰化反应（温度：70℃-80℃，收率：96.2%，纯度：99.6%)，氯磺化反应（温度；0℃-60℃，收率：89.2%，纯度：97.5%)，磺酰胺化反应（温度：70℃-80℃，收率；96.2%，纯度：99.5%)，酰胺水解反应(3mol/l盐酸回流，收率；81.7%，纯度：99.2%)合成标题化合物，讨论了反应条件。     

利用废聚苯乙烯泡沫塑料制备抗冻胶粘剂的研究

叙述述了以废聚苯乙烯泡沫塑料为主要原料，经溶解，生，乳化等步骤研制出性能优异的抗冻粘结剂，最佳配方为废聚苯乙烯：溶剂：异氰酸酯：聚乙烯醇缩甲醇：ＯＰ－１０＝６：６：１．５：２：１．５。产品性能测试表明，常温下粘接强度达３．３８ＭＰａ，超过了通白乳胶的水平，产品经－１８℃冷冻５ｈ后，仍保持良好的粘接能力，显示出产品具有良好的低温性能。     

炭素专利

公开号：1559678，公开日：2005-01-05，发明人：黄德欢，孔凡志，吴江峰，发明名称：用于制备碳纳米管的氧化铝载体金属氧化物催化剂及其制备方法。     

Quantitative analyses of electric field–induced phase transition in (Na,K)0.5Bi0.5TiO3:Eu ceramics by photoluminescence

Most reported results about phase transition probed by the photoluminescence (PL) spectra of Eu³⁺ ions are qualitative, but the quantitative analyses of phase transition were presented in this work. We fabricated (Na_0.8, K_0.2)_0.5Bi_0.497Eu_0.003TiO₃ (NKBT20:Eu) ferroelectric ceramics and investigated the phase structures and the PL spectra of NKBT20:Eu ceramics before and after poling at different electric fields. The PL spectra indicate a phase transition from tetragonal phase (T phase) to rhombohedral phase (R phase) within NKBT20:Eu ceramics after poling, consistent with the analyses by X-ray diffraction (XRD). Moreover, the emission intensity ratios of the “hypersensitive” transition to the magnetic dipole transition could be used to calculate the fractions of the phase transition quantitatively, which were further confirmed by XRD Rietveld refinements. This study provides a different perspective to investigate the phase transition induced by electric field for NKBT20:Eu ceramics, qualitatively and quantitatively, and the method is expected to be useful in more cases of phase analyses.     

乳化液膜法提取废水中的阿司匹林

针对阿司匹林（ASA）结晶母液经处理后产生的废液,采用搅拌和超声结合的方法制备了乳化液膜体系来回收ASA。以环己烷为膜溶剂,Span80做表面活性剂,石蜡做膜稳定剂,氢氧化钠（NaOH）为内水相,研究了表面活性剂浓度、内水相NaOH浓度、内水相类型、外相pH、油内比、乳水比、搅拌速度、膜溶剂类型、盐浓度、ASA初始浓度等试验条件对ASA萃取效果的影响,并进行了破乳研究。结果表明：在最佳实验条件下[环己烷90%（质量分数）、Span80 6%（质量分数）、C（NaOH）=0.1mol/L、油内比1：1、水乳比1：4、搅拌速度200r/min、ASA初始浓度500mg/L],不对外相进行pH调节时,15min后ASA的萃取率可高达97.4%。对实验后的乳液进行离心破乳,20min后破乳率可达72.9%,破乳后的油相重复利用5次后,对ASA的提取率仍在76%左右。     

用乳状液型液膜提取铕的传质机理研究

本文研究了用乳状液型液膜提取稀土元素铕的工艺条件,考查了不同因素对铕的传质速率的影响.实验结果表明,以二(2-乙基己基)磷酸为载体,硝酸为解络剂的乳状液型液膜对铕的迁移效果很好.本文重点探讨了该液膜体系的传质机理,推导出本体系的传质通量式,并用实验数据进行了验证,取得了较好的一致性.     

高速逆流色谱快速分离四种甘草黄酮及其结构鉴定

通过高速逆流色谱从新疆产甘草粗提物中分离得到甘草黄酮醇、甘草素、芒柄花素和甘草异黄酮甲四种甘草类黄酮。溶剂系统为正己烷-乙酸乙酯-甲醇-水（1：2：1：1），上相作为固定相，下相作为流动相，主机旋转方向为顺时针，转速850rpm，流速4．0mL／min，检测波长260nm。经过160min分离，从400mg甘草粗提物中得到甘草黄酮醇26mg、甘草素8mg、芒柄花素12mg、甘草异黄酮甲10mg，纯度分别为96．3％、95．7％、98．5％、98．8％。结构经熔点、UV、MS、^1H—NMR和^13C-NMR鉴定。     

18%克·福种衣剂高效液相色谱测定

本文采用高效液相色谱法，以甲醇：水（５０：５０）作为流动相，采用ＯＤＳ－Ｃ１８色谱柱， 成功地测定了克·福种衣剂中有效成分含量。     

非水微乳体系相图研究

研究了以甲醇或甲酰胺为极性相,正辛烷为油相,添加不同HLB值的表面活性剂形成的非水微乳体系的三元相图.结果表明,具有适当HLB值的表面活性剂可与正辛烷、甲醇或甲酰胺形成单相区,亲水性强的表面活性剂不利于形成单相微乳体系;在m(表面活性剂):m(正辛烷)=1∶4,甲醇(甲酰胺)增溶量为最大增溶量的50％时,各微乳液相点的粒径在20～60 nm.     

Hydrolysis of intralipid by pancreatic lipase and phospholipase A2-gel filtration studies

Intralipid was incubated with pancreatic lipase (EC 3.1.1.3) and/or phospholipase A₂ (EC 3.1.1.4) at two bile salts/phosphatidylcholine molar ratios and at two different triglyceride hydrolysis rates using various amounts of lipase. Incubations were studied by gel filtration. Results show: (i) During lipase action, three phases of lipids coexist: an emulsified phase, a micellar phase and an intermediate heavy phase sized between the two others. The equilibrium between each phase is dependent upon the bile salts concentration. (ii) Under these conditions, pancreatic lipase was at 60% bound to the emulsified phase, whereas pancreatic phospholipase A₂ was bound at 94% to the micellar phase.     

Blends of poly(ethylene terephthalate) and a polyarylate before and after transesterification

Blends of poly(ethylene terephthalate) (PET) and a copolyester of bisphenol A–terephthaloylisophthaloyl (PAr) (2:1:1) have been studied both before and after transesterification. The physical blends exhibit phase separation in their amorphous states: a pure PET phase and a mixed PAr-rich phase. In spite of this phase separation, PET crystallinity in blends, normalized to PET fraction, surprisingly goes through a maximum at 25% PAr content. The transesterfied copolymers are noncrystallizable and exhibit a single T_g between those of starting polymers, PET and PAr.     

Factors affecting behavioral phase transition in the desert locust,Schistocerca gregaria (Forskål) (Orthoptera: Acrididae)

The behavior of the desert locust,Schistocerca gregaria (Forskål) (Orthoptera: Acrididae), is adjusted rapidly to population density and is a phase characteristic. We used discriminant analysis to quantify the extent of phase transition from the solitary to the gregarious phase and accurately classify the phase status on the basis of two decisive behavioral parameters: nymphal activity and social interaction. Fecal extracts. examined by olfactometry, attract solitarious nymphs but do not contribute to behavioral phase transition. Neither do visual stimuli alone. Short-range olfaction of airborne volatiles slightly affects behavioral phase transition. Antennectomy abolishes density response. Cuticular lipid extract, containing presumptive contact pheromones, does not attract nymphs, but does significantly affect behavioral phase transition.     

Methanol recycling in the production of biodiesel in a membrane reactor

Membrane reactor technology was used to overcome challenges in biodiesel production. The membrane reactor produces a permeate stream which readily phase separates at room temperature into a fatty acid methyl ester (FAME)-rich non-polar phase and a methanol- and glycerol-rich polar phase. To decrease the overall methanol:oil molar ratio in the reaction system, the polar phase was recycled. Three recycle ratios were tested: 100%, 75% and 50%, at the same residence time and operating conditions. The permeate consistently separated to yield a FAME-rich non-polar phase containing a minimum of 85 wt.% FAME (the remainder being methanol) as well as a methanol/glycerol polar phase. At the highest recycle ratio, the FAME concentration ranged from 85.7 to 92.4 wt.% in the FAME-rich non-polar phase. In addition, the overall molar ratio of methanol:oil in the reaction system was significantly decreased to 10:1 while maintaining a FAME production rate of 0.04 kg/min. As a result, a high purity FAME product was produced.