正常妊娠晚期与妊高征部分凝血指标分析

探讨妊娠晚期与妊高征体内血栓前状态的止凝血状况,进一步研究了妊高征的发病机制和弥漫性血管内凝血（DIC）的关系。运用全自动血凝仪和酶联免疫吸附试验（ELISA）方法对100例正常未孕组,100例正常晚期妊娠组,58例妊高征患者进行了5项凝血指标的检测。其结果妊娠晚期血浆凝血酶原时间（Prothrombin Time,PT),组织因子途径抑制物（Tissue Factor Pathway Inhibitor,TFPI)均较正常未孕组降低（P＜0．01）,而血浆纤维蛋白原（Fibrinogen,FIB),凝血因子Ⅶ促凝活性（FⅦ：C）,组织因子（Tissue Factor,TF)则升高（P＜0．01）,妊高征时PT,TF均较正常未孕线增高,而FUB,MFⅦ：C、TFPI则降低（P＜0．01）,妊高征与妊娠晚期组比较PT,TF均升高,而FIB,TFPI,Ⅶ：C则下降。表明妊娠晚期机体处于一种高凝状态,一旦有产科DIC诱因存在,极易发展成DIC,而妊高征时机体凝血平衡失调,高凝状态进一步发展,与DIC发病密切相关。     

交变电场频率对荷电微细粉尘凝并影响的实验研究

高流场中气体粒子动量大,有助于提高其输运项和等离子体浓度,使高流场中微细粉尘凝并成为可行.为此进行高流场中交变电场频率对微细粉尘凝并的实验研究.结果表明:凝并电场强度峰值为590 V/cm,频率在80-100 Hz时,0.3～0.5μm范围内的粉尘粒数占有率降低25%左右;大于1μm范围的粉尘粒数占有率提高35%左右.从实验数据可知,高流场中微细烟尘凝并最佳频率为80～100 Hz.本实验研究结果表明,在不增加电除尘器的体积和不改变其原有运行参数的条件下进行电凝并收尘,有望解决电除尘器对微细粉尘捕集效率低的问题.     

Artificial neural network approach to assess selective flocculation on hematite and kaolinite

Because of the current depletion of high grade reserves, beneficiation of low grade ore, tailings produced and tailings stored in tailing ponds is needed to fulfill the market demand. Selective flocculation is one alternative process that could be used for the beneficiation of ultra-fine material. This process has not been extensively used commercially because of its complex dependency on process parameters. In this paper, a selective flocculation process, using synthetic mixtures of hematite and kaolinite in different ratios, was attempted, and the adsorption mechanism was investigated by Fourier transform infrared (FTIR) spectroscopy. A three-layer artificial neural network (ANN) model (4-4-3) was used to predict the separation performance of the process in terms of grade, Fe recovery, and separation efficiency. The model values were in good agreement with experimental values.     

FeCl3/PAM混凝-光催化氧化法对海水的预处理

采用混凝 光催化技术对海水进行预处理. 实验结果表明： 当温度为10～25 ℃、 pH为7.0～8.0、 FeCl3投加量为2.5 mg/L、 聚丙烯酰胺(PAM)投加量为0.75 mg/L时, 海水中浊度去除率为96%; 以纳米TiO2为催化剂进行光催化氧化, 当光催化剂用量为1.8 g/L、 反应25 h时, 化学需氧量(COD)降解率为99.58%. 混凝与光催化协同作用, 可使海水中浊度及有机物均达到反渗透的进水水质要求.     

大鼠再生肝8种细胞的基因转录谱预示BE115434和X76129参与凝血反应

为了解新基因BE115434和X76129与大鼠再生肝的凝血反应相关性,按张丽君[1]等方法分离大鼠再生肝8种细胞、检测它们的基因表达变化,分析新基因的序列同源性、共表达关系及参与的生理活动.结果表明,X76129与纤溶酶原激活酶基因plaur同源和共表达,BE115434与纤维蛋白活化因子抑制蛋白serpind1同源和共表达.它们的表达变化预示X76129和BE115434参与大鼠再生肝的凝血反应.     

混凝-超滤组合工艺在高铁酸性矿井水处理中的研究

研究了混凝-超滤组合工艺去除煤矿矿井水中铁的方法,确定了混凝-超滤系统运行的最佳参数。采用连续曝气方式运行的混凝-超滤膜装置的组合工艺处理矿井水,铁的去除率高达99％,系统出水的其他各项指标也达到了生活杂用水水质标准。     

磁粉与PAM联用强化饮用水处理的试验研究

通过小试实验,研究了磁粉与PAM联用强化混凝沉淀工艺对长江水的强化处理效能;并且分析了各添加介质的最佳投加量以及相互的影响机制。结果表明同时投加磁粉和PAM能够有效提高絮体沉降性能,促进出水水质的提高;并且可以在一定程度上提高对原水中有机物的去除效果。通过分析实验结果并结合实际应用的经济性确定反应中混凝剂PAC、磁粉和PAM的最佳投加量分别为30 mg/L,100 mg/L,1 mg/L。试验证明采用磁粉与PAM强化饮用水混凝沉淀工艺处理是可行的,并且在降低水厂的基建投资和提高处理效率方面具有重要的意义。     

中医综合疗法治疗寒凝血瘀型原发性痛经40例

本研究观察了中医综合疗法治疗寒凝血瘀型原发性痛经的临床疗效。将80例寒凝血瘀型原发性痛经患者随机分为两组,其中治疗组40例以中药内服、外敷、针灸联合治疗;对照组40例以少腹逐瘀胶囊治疗。结果表明：治疗组总有效率97．6％;对照组总有效率83．3％。两组总有效率比较,有显著差异性P〈0．05。因此中医综合疗法治疗寒凝血瘀型原发性痛经有良好疗效。     

Surface exposure of phosphatidylserine in pathological cells

The asymmetric phospholipid distribution in plasma membranes is normally maintained by energy-dependent lipid transporters that translocate different phospholipids from one monolayer to the other against their respective concentration gradients. When cells are activated, or enter apoptosis, lipid asymmetry can be perturbed by other lipid transporters (scramblases) that shuttle phospholipids non-specifically between the two monolayers. This exposes phosphatidylserine (PS) at the cells outer surface. Since PS promotes blood coagulation, defective scramblase activity upon platelet stimulation causes a bleeding disorder (Scott syndrome). PS exposure also plays a pivotal role in the recognition and removal of apoptotic cells via a PS-recognizing receptor on phagocytic cells. Furthermore, expression of PS at the cell surface can occur in a wide variety of disorders. This review aims at highlighting how PS expression in different cells may complicate a variety of pathological conditions, including those that promote thromboembolic complications or produce aberrations in apoptotic cell removal.Received 26 November 2004; received after revision 3 January 2005; accepted 10 January 2005 Available online 09 March 2005     

新型阳离子淀粉的研究

对两类新型阳离子淀粉——阳离子羟乙基淀粉和阳离子苄基淀粉的合成方法进行了研究．通过元素分析和红外光谱对其进行了初步表征．元素分析表明，所得产物取代度小于０．２；红外光谱分析表明在阳离子淀粉中引入了羟乙基和苄基，与预期结构相符．此外，对两类新型阳离子淀粉的某些使用性能如絮凝性、破乳性进行了初步探讨，并与普通阳离子淀粉进行了比较．试验表明，阳离子羟乙基淀粉具有较好的絮凝性能；阳离子羟乙基淀粉、阳离子苄基淀粉对破乳剂有增效作用，且可改善脱出水的水质．两种新型阳离子淀粉比普通阳离子淀粉具有更好的使用性能．