核桃壳活性炭的制备及其对烟酸缓释性能的研究

以二氧化碳(CO2)物理活化法制备了核桃壳活性炭,考察了活化温度、活化时间对核桃壳活性炭得率及烟酸吸附量的影响。以所制备的核桃壳活性炭为烟酸载体,在不同的释放介质(蒸馏水、人工胃液或人工肠液)中进行烟酸释放性能研究。结果表明,人工胃液和人工肠液能促进活性炭对烟酸的释放,其累计释放率分别达到43.96%和47.69%。核桃壳活性炭在3种不同介质中的不同释放阶段的释放过程均符合Higuchi模型。     

Pharmacokinetic Comparison of Berberine in Rat Plasma after Oral Administration of Berberine Hydrochloride in Normal and Post Inflammation Irritable Bowel Syndrome Rats

In the present study, post inflammation irritable bowel syndrome (PI-IBS) rats were firstly established by intracolonic instillation of acetic acid with restraint stress. Then the pharmacokinetics of berberine in the rat plasma were compared after oral administration of berberine hydrochloride (25 mg/kg) to normal rats and PI-IBS rats. Quantification of berberine in the rat plasma was achieved by using a sensitive and rapid UPLC-MS/MS method. Plasma samples were collected at 15 different points in time and the pharmacokinetic parameters were analyzed by WinNonlin software. Compared with the normal group, area under the plasma concentration vs. time curve from zero to last sampling time (AUC_0–t) and total body clearance (CL/F) in the model group significantly increased or decreased, (2039.49 ± 492.24 vs. 2763.43 ± 203.14; 4999.34 ± 1198.79 vs. 3270.57 ± 58.32) respectively. The results indicated that the pharmacokinetic process of berberine could be altered in PI-IBS pathological conditions.     

园林景观设计中水景的营造手法

在园林景观设计中,水景的设计和营造是重要的表现手段,本文主要就园林景观设计中水景营造的具体手法做了进一步探讨。     

中国古典园林空间与诗词意境

该文运用城市空间理论研究中国古典园林空间.借助现代诗学理论探讨了诗词的意境,并用历史的眼光去认识了园林空间与诗词意境的融合,阐述了现代环境景观设计应继承优秀的传统文化,并结合现代科技手段,在有限的空间环境中创造无限的空间意境,逐步形成自己的空间观.     

2,2'-双[4-(3-氨基苯氧基)苯基]丙烷的合成

提出了以间二硝基苯和双酚A为原料经缩合和水合肼催化还原合成聚酰亚胺的单体2,2'-双[4-(3-氨基苯氧基)苯基]丙烷的新工艺,考察了各类工艺条件对目标产物收率的影响,得到最适宜反应条件,在优化条件下,总收率为85.5%.HPLC面积归一法测定目标产物纯度为99.97%,并用元素分析和红外光谱对目标产物进行了表征.     

HIPS/PPO共混物拉伸和冲击断裂面的电镜观察

研究了高冲击强度聚苯乙烯(HIPS)/聚苯醚(PPO)共混物断面3个特征区的形貌特征及形成机制,分析了它们对材料力学性能的影响。     

ACF/TiO2复合材料的制备及光催化降解偏二甲肼废水

用溶胶-凝胶法制备ACF/TiO2复合材料,并用于光催化降解偏二甲肼废水。同时,还讨论了材料的活化温度、偏二甲肼废水的初始浓度、H2O2及催化剂重复利用等因素对光催化效率的影响。实验结果表明,当材料的活化温度为300℃,体系中H2O2的浓度为0.12mol/L时,偏二甲肼的降解效果良好,偏二甲肼40min后的降解率达到99%以上。