盐酸小檗碱-环糊精包合物的体外溶出度研究

目的探讨包合技术对中药制剂体外溶出度以及缓释作用的影响。方法选用饱和溶液法生成包合物 ,用DSC证明包合物的生成 ;采用分光光度法 ,考察盐酸小檗碱包合物的体外溶出度和缓释作用。结果 β CD·BH、RM β CD·BH和BH的T50 、Td分别为 5 69.8,740 .2min ;73 .7,10 7.0min和 19.6,2 5 .5min ,包合物的释药数据与t作线性回归方程为 :Y =0 .0 63 9t -0 .473 8,Y =0 .5 5 64t+5 .65 8。结论RM β CD·BH和 β CD·BH的溶出速率明显慢于BH ,具有一定的缓释作用 ,同时RM β CD·BH较β CD·BH具有更好的生物利用度 ;β CD·BH和β CD·BH的体外溶出度与t为一相关性良好的线性方程 ,符合零级释药方程。     

有机硅改性丙烯酸乳液性能的研究

采用含乙烯基官能团的有机硅单体与甲基丙烯酸酯、丙烯酸酯和丙烯酸羟基酯等单体通过种子乳液聚合方法进行共聚,合成了有机硅改性丙烯酸酯共聚乳液,考察了有机硅单体用量对乳液机械稳定性、热稳定性、电解质稳定性和冻融稳定性的影响,同时还考察了乳液胶膜的机械性能和吸水率改进。     

不同煅烧温度下形成的含氟硫A矿对水泥水化性能的影响

为研究不同煅烧温度下，含氟硫熟料中不同性能、形貌特征的A矿与水泥水化形成钙矾石的关系以及A矿对水泥水化性能的影响，采用工业原料并尽量模拟立窑内煅烧状况，对经1350℃和1425℃温度下煅烧的熟料进行了A矿形貌、A矿水化率及A矿与钙矾石形成关系等系列试验。试验结果表明，在传统的煅烧温度下（1400～l425℃）烧成的熟料．其A矿的固溶程度及A矿含量均比低温（1350℃）烧成的高；掺氟硫复合矿化剂烧制的熟料的A矿具有较高的水化速度，熟料强度较高．其制成的水泥在水化时，液相成分受高固溶程度A矿的水化所控制，所形成的钙矾石较低温煅烧的稳定．且A矿水化产物的形成与钙矾石（AFt）的形成较协调，水泥石机械强度更高。     

尿基复合肥生产技术的改进

通过分析尿基复合肥生产过程中出现的问题，并相应提出技术改进措施，优化操作，对复合肥产量的提高和产品质量的控制都取得了明显的效果。     

Photocatalytic microreactor study using TiO2-coated porous ceramics

Two kinds of porous ceramic disks, having through-holes with diameters of 0.1 and 0.05 mm, were coated with TiO₂ using two different starting solutions: titanyl(IV)acetylacetonate and a commercial titania sol (STS-01). The morphology of these porous ceramics before and after TiO₂ coating was observed by SEM. The TiO₂-coated porous ceramics were examined as honeycomb photocatalytic microreactors. The photocatalytic activity was evaluated using the decomposition of methylene blue solution for radiation angles of 0° and 10° with respect to the pore axis. The highest photocatalytic activity was obtained for the porous ceramic having the pore diameter of 0.1 mm, coated with titanyl(IV)acetylacetonate and irradiated with a light angle of 0° with respect to the pore axis.     

过磷酸钙喷涂法生产硫基复合肥工艺研究

简述了过磷酸钙喷涂法生产硫基复合肥的反应原理及工艺方案、实施方案的确定。给出了该工艺较传统工艺的优势及特点。     

Cure monitoring via different techniques: Isothermal cure of an epoxy-novolac molding compound

The isothermal cure of an epoxy-novolac molding compound was studied by means of Fourier-transform infrared spectroscopy (FTIR) and dielectrometry (DE). Results obtained were compared with previous differential scanning calorimetric (DSC) observations. The behavior of epoxide conversion (_FTIR) measured via FTIR was found similar to (but not exactly coinciding with) the extent of cure (_DSC) determined previously by means of DSC. As for the DE analysis, directly measurable properties such as permittivity () and loss factor () varied in a complicated manner during the course of cure, showing strong dependence on both temperature and frequency. Other dielectric parameters (such as ionic conductivity, relaxed permittivity, and characteristic relaxation time) previously suggested in the literature as suitable for cure monitoring purposes were found difficult to determine within the limited frequency range (10⁰ to 10⁴ Hz) here. With some arbitrariness, the relative drop in log (at 100 Hz) was taken as an index (_DE) for the extent of cure. It was observed that _DE behaves in a manner similar to _FTIR and _DSC Comments on the application of these three techniques in the characterization of thermosetting systems were given.     

Li4Ti5O12/Fe3O4复合材料的制备及其电化学性能

以醋酸锂和钛酸四正丁酯为原料,制备了纯相Li_4Ti_5O_(12),再用简单的水热法合成Li_4Ti_5O_(12)/Fe_3O_4复合材料作为锂离子电池的负极材料,通过XRD、SEM以及电池测试系统对纯相Li_4Ti_5O_(12)和Li_4Ti_5O_(12)/Fe_3O_4复合材料进行了结构、形貌及电化学性能测试。结果表明,制得的复合物具有较好的球形结构且粒径较小(200～300 nm),综合电化学性能较好。由于复合的Fe_3O_4有较高的理论容量,该Li_4Ti_5O_(12)/Fe_3O_4复合材料表现出比纯相Li_4Ti_5O_(12)大的容量,在1.0 C下循环100圈后,Li_4Ti_5O_(12)/Fe_3O_4的放电比容量仍能达到470.2 m A·h/g,同时也表现出比纯相Li_4Ti_5O_(12)更优的倍率性能。     

亚硝酸盐的光催化氧化

利用半导体光催化剂Bi2O3 对含亚硝酸盐废水的处理进行了研究，并讨论了影响亚硝酸盐氧化率的主要因素，实验结果表明：选择活性较高的Bi2O3作为光催化剂，当其用量为0.050g，试液PH=3.70,NO2^--N起始浓度为400.0mg/L，光照1h时，亚硝酸盐的氧化率达到97.0%。     

[火用]分析环境模型及其确立原则的研究

对现有的环境模型和有关环境模型的理论进行了评述和分析，指出了确定环境模型的理论以及现有的环境模型中存在的问题，提出了比较系统的确定环境模型的理论原则。