1,1—硫—双苯并咪唑与螺二邻二亚甲基噻吩和环二邻二亚甲基噻吩的合成

报道了螺二邻二亚甲基噻吩和环二邻二亚甲基噻吩的硫转换法合成。硫转换试剂１，１＇－硫－双苯并咪唑与２，３－二羟亚甲基噻吩作用生成活性中间体２，３－二甲甲基－２，３－二氢化噻吩７，后者在室温条件下通过双自由基聚合成螺二邻二亚甲基噻吩８和环二邻二亚甲基噻吩９。螺环化合物８和环状化合物９的结构由波谱分析给予确定。     

1，1─硫─双苯并咪唑与螺二邻二亚甲基噻吩和环二邻二亚甲基噻吩的合成

报道了螺二邻二亚甲基Ｋ塞吩和环二邻二亚甲基噻吩的硫转换法合成。硫转换试剂１，１′－硫－双苯并咪唑与２，３－二羟亚甲基噻吩作用生成活性中间体２，３－二亚甲基－２，３－二氢化噻吩７，后者在室温条件下通过双自由基聚合成螺二邻二亚甲基噻吩８和环二邻二亚甲基噻吩９。螺环化合物８和环状化合物９的结构由波谱分析给予确定。     

几种杀蜗药剂对农田蜗牛的防效

蜗牛是本地农田的重要有害生物，为筛选防治蜗牛的理想药剂，我们选用三种防治蜗牛专用药剂，按厂方的推荐用量，对农田蜗牛的防治效果进行了比较试验，结果如下：１　供试药剂６％密达颗粒剂（四聚乙醛复配，广州农药厂生产）２％灭旱螺颗粒剂（四聚乙醛复配，德国拜耳公司生产）０－７５％除蜗灵颗粒剂（呋喃丹复配，江苏好收成集团生产）２　处理设置及实施方法选择蜗牛数量较大的蚕豆田一块，设６％密达颗粒剂５００ｇ／６６７ｍ２、２％灭旱螺颗粒剂４００ｇ／６６７ｍ２、０－７５％除蜗灵颗粒剂４００ｇ／６６７ｍ２（均为厂方推荐用…     

Sol—Gel法制备有机—无机复合光致变色膜

本文讨论了用ｓｏｌ－ｇｅｌ法在有机改性ＳｉＯ２基体中于室温下俘陷有机染料如螺吡喃或螺恶嗪，制备出具有光致变色功能的有机－无机复合膜。该膜层在可见光区的最大吸收峰位于６２０ｍｎ处。     

组合桨搅拌器的宏观混合特性

分别以浓度为１％，２％，３％，３．５％的羧甲基纤维素溶液为实验，采用测温法，测定了正交双层三角桨－单螺带桨，正交双层三角桨－内外单螺带桨．锚式桨－三叶推进器．锚式桨－内外单螺带４种组合桨拌器的宏观混合时间，无量钢数Ｃ１，Ｃ２，Ｃ３，Ｃ４综合评判了它们的宏观混合性能，实验证明，前２种组合桨搅拌器在不同流域内都使搅拌介质达到良好的宏观混合，且功率消耗低，混合效率高，具有明显的节能优势，对搅拌变粘度体系     

Fe2（SO4）3／SnCl4催化合成1,4—二氧螺[4,5]癸烷

使用复合路易斯酸Ｆｅ２（ＳＯ４）３／ＳｎＣｌ４催化合成了１，４－二氧螺［４，５］癸烷，并探讨了合成条件。     

Fe_2（SO_4）_3／SnCl_4催化合成1，4－二氧螺［4，5］癸烷

使用复合路易斯酸Ｆｅ２（ＳＯ４）３／ＳｎＣｌ４催化合成了１，４－二氧螺［４，５］癸烷，并探讨了合成条件。     

塑料用膨胀型阻燃剂

本文叙述作者合成的两种单一化合物膨胀型阻燃剂的制法及应用，这两种阻燃剂是：２，４，８，１０－四氧－３，９－二磷螺环［５．５］十一烷－３，９－二氧－３，９－二三聚氰胺盐及双［２，６］－二氧－１－磷－双环［２，２，２］辛烷－１－氧甲基）磷酸酯三聚氰胺盐。此外，本文还讨论了Ｓｐｉｎｆｌａｍ膨胀型阻燃剂与聚磷酸铵混合物的阻燃效能。     

墙地砖模具侧板裂变原因分析

１　问题提出模具质量的高低直接影响着墙地砖的产量、质量和成本。生产中由于模具而使砖产生的缺陷占４０％左右,而模具侧板的整体脆断和局部螺孔周裂是这些缺陷中最为严重的,应引起注意。２　原因分析２．１　侧板整体脆断侧板整体脆断表现为：带螺孔的侧板在冲压成形过程中从通过螺孔中心的横断面上发生整体断裂,如图１所示。图１　螺孔侧板断裂示意图这一现象是由两方面原因造成的。一是侧板的锻造缺陷和热处理缺陷。锻件内部有微小裂纹,在工作一段时间后由于磨擦而产生的表面划痕使得侧板疲劳强度降低,在继续工作中,尤其是当模芯…     

L—（＋）—2—氨基—1—对硝基苯基—1,3—丙二醇的硼化反应研究

研究了Ｌ－（＋）－２－氨基－１－对硝基苯基－１，３－丙二醇及其Ｎ－酰化产物在不同条件下的硼化反应，分别得到稀烃，三配位硼酸酯和四配位硼螺环化合物。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

我国聚碳酸酯工业发展概况

介绍我国聚碳酸酯生产能力和消费需求,对聚碳酸酯在信息工业中的应用作了简短介绍     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003     

气化给煤系统故障分析

气化给煤装置自投运以来,出现了气化煤仓堵煤、称重给煤机输送皮带因跑偏而损伤以及清扫装置故障频繁等问题,多次造成气化系统减负荷运行。通过对出现的各种问题进行分析,找到了产生这些问题的原因,并有针对性地采用配煤和改进清扫链等措施,使出现的问题得到了极大的改善。     

醋酸纤维素取代基分布与性质的关系

分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。     

Generalization of vdW type of equations of state

1 INTRODUCTIONBecause of importance of equations of state (EOS)in science and industry,hundreds forms of EOS havebeen presented since latter 19th century.It seems impossible to develop a general equation covering vari-ous kinds of EOS.But for cubic EOS,several generalequations have been reported already. Martin presented the first general equation whichis following p=RT/V-α(T)/(υ β)(υ γ) δ(T)/υ(υ β)(υ γ) (1) Kumar et a1.presented an equation called the most general form of a density-cubic or, alterna tively,volume-cubic mathematical equation,the form of which is as follows