Rapid Carbonation for Calcite from a Solid-Liquid-Gas System with an Imidazolium-Based Ionic Liquid

Aqueous carbonation of Ca(OH)₂ is a complex process that produces calcite with scalenohedral calcite phases and characterized by inadequate carbonate species for effective carbonation due to the poor dissolution of CO₂ in water. Consequently, we report a solid-liquid-gas carbonation system with an ionic liquid (IL), 1-butyl-3-methylimidazolium bromide, in view of enhancing the reaction of CO₂ with Ca(OH)₂. The use of the IL increased the solubility of CO₂ in the aqueous environment and enhanced the transport of the reactive species (Ca²⁺ and CO₃²⁻) and products. The presence of the IL also avoided the formation of the CaCO₃ protective and passivation layer and ensured high carbonation yields, as well as the production of stoichiometric rhombohedral calcite phases in a short time.     

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.     

浅谈桥面铺装层裂缝产生的原因与修补措施

近年来,由于高速公路的损坏而导致的交通事故越来越多,所以逐渐引起了人们的重视。水泥混凝土桥面板破损往往是面积最大的、也是最严重的,其他比较常见的病害有桥面铺装层破损、开裂、错台、麻面和磨光等。     

力反馈虚拟手术器械的设计

设计了一种二维虚拟手术器械,提出一种机械结构设计方案,以及软件实施方案.研究了虚拟手术器械设计中一些关键问题,如元器件选择,电机堵转等,并通过实验建立了电机堵转状况下的力矩模型.     

核电厂蒸汽发生器多功能模拟体研制

在压水堆核电厂蒸汽发生器的在役检查和维修中,需要使用蒸汽发生器模拟体,预先对检修工器具进行调试、验证以及人员的培训。基于蒸汽发生器模拟体的功能需求和设计要求,研制了一种可满足多种需求的蒸汽发生器模拟体,模拟体总体结构设计为原型二分之一,选用复合材料,并设置有观察窗。模拟体具有结构紧凑、经济性高、可观测等特点。功能试验验证结果表明,本文所述蒸汽发生器模拟体可有效用于核电厂蒸汽发生器的检修培训。     

数理统计方法在1J85软磁合金生产中的应用

本文介绍了利用数理统计方法中的相对频数曲线,统计、分析实际生产中1J85软磁合金主要化学成分的分布情况,找出影响1J85软磁合金初始磁导率的因素,并采取了相应的改进措施,使1J85软磁合金产品的初始磁导率有了显著的提高.     

混凝剂预处理非工艺低放废水研究

我国后处理工业示范厂和后处理大厂产生的非工艺低放废水具有年产生量大、成分复杂、污染核素种类多等特点。针对后处理非工艺低放废水的特点,初步探究了使用混凝剂处理非工艺低放废水的可行性。研究用非离子型聚丙烯酰胺(NPAM)为助凝剂,比较了聚合氯化铝(PAC)、聚合硫酸铁(PFS)、阴离子型聚丙烯酰胺(PAM)3种混凝剂对模拟非工艺低放废水中总有机碳(TOC)的去除效果。通过正交实验探讨了混凝效果的影响因素。结果表明:聚合氯化铝对模拟非工艺低放废水的混凝效果最佳,混凝剂的投加量是影响混凝效果的主要因素。当混凝剂和助凝剂的加入量分别为348 mg/L和24μg/L、混凝时间为30 min、pH=5时,得到去除模拟非工艺低放废水中TOC的最优方案,TOC去除率达到24%。     

不可压缩粘性流动SUPG稳定格式有限元法的时间离散新格式

流体域的高效精确计算是大跨空间柔性结构流固耦合问题研究的关键之一.提出对不可压缩粘性流体控制方程具有显式时间离散格式的三步SUPG稳定格式有限元法,以二维拖拽方腔流为对象,运用本方法进行不可压缩粘性流动问题的数值模拟.计算分析显示,三步SUPG稳定格式有限元方法具有较高的精度和稳定性,可应用于非定常不可压缩粘性流动和大跨柔性结构风场耦合问题中风场流动的模拟计算.     

BIM技术在天津永基花园二期项目中的应用

文章介绍了天津市永基花园二期项目BIM的应用背景、建模过程、碰撞检查、三维场布、BIM5D软件应用等,分析了BIM在该项目中的应用价值、存在问题,并提出了对BIM应用的展望。     

壳聚糖涂膜保鲜剂的改性研究进展

综述了壳聚糖涂膜在果蔬表面的界面特性,及通过物理或化学复合改性方法改善了壳聚糖涂膜的润湿性、透气性、机械强度和抑菌性相关方面的报道,为壳聚糖涂膜保鲜剂的研究提供参考和借鉴。