成品硫乙醇酸盐流体培养基用于无菌检查效果的评价

目的对成品硫乙醇酸盐流体培养基用于无菌检查的外观、有效性及稳定性进行评价。方法选用1批成品硫乙醇酸盐流体培养基,以3个月为1个时间节点,连续进行5次无菌检查,每次试验采用3个不同厂家的生物制品。结果使用该批培养基进行5个时间节点的无菌检查结果均合格,且外观良好。结论该成品培养基用于无菌检查具有良好的外观、有效性和稳定性,完全可取代自行配制的培养基进行无菌检查,提高工作效率及减少人为误差。     

硫乙醇酸盐流体培养基的特点及问题分析

文章对硫乙醇酸盐流体培养基的成分及特点进行归纳,对该培养基在使用中出现的问题进行小结,并对硫乙醇酸盐流体培养基在药品无菌检查过程中的局限性进行了分析讨论。     

硫乙醇酸盐培养基中的刃天青的作用分析

目的分析刃天青在硫乙醇酸盐培养基中的作用。方法按2000版《中国生物制品规程》中培养基灵敏度的测定方法,将0.1%刃天青以不同量加入硫乙醇酸盐培养基中,用厌氧菌株生孢子梭状芽胞杆菌、需氧菌株短芽胞杆菌及乙型溶血性链球菌分别进行不同含量刃天青、煮沸驱氧与未驱氧的灵敏度比较。结果不同刃天青含量与未加刃天青、煮沸驱氧与未驱氧的硫乙醇酸盐培养基的灵敏度无明显差异。结论用以上3个标准菌株检测不同刃天青含量的硫乙醇酸盐培养基的灵敏度,其指示剂的作用不明显。     

加入乙醇提高火焰原子吸收测定灵敏度的方法

火焰原子吸收争光光度计使用年龄较长后,测定短波元素时（如Ｐｂ）灵敏度相对较低,笔者通过实验在试液中加入一定量的无水乙醇,可将其灵敏度提高两至三倍。     

脂肪酸单乙醇酰胺羧酸盐的合成研究

研究了不同溶剂和催化剂对脂肪酸单乙醇酰胺羧甲基化反应的影响.以油脂为原料,经酯交换、酰胺化和羧甲基化反应制得脂肪酸单乙醇酰胺羧酸盐(AMEC). 研究表明,羧甲基化反应中,当采用溶剂A(代号)及自制的碱性催化剂时,其酰胺的转化率可以达到90.5%以上.产物的γ<,cmc>=25.33mN/m, cmc=1.86mmol/L,罗氏泡沫高度为194mm,具有优良的表面活性.     

铜基硫族化合物电催化二氧化碳还原制甲酸盐的研究进展

因电催化二氧化碳还原反应（CO₂ reduction reaction,CO₂RR）助于降低大气二氧化碳浓度缓解环境问题,还可以生产高附加值化学品,引起了广泛关注。甲酸盐作为二氧化碳电还原的重要产物之一,在化工、燃料电池等领域广泛应用。铜基硫族化合物（Cu_xS）由于价格便宜、催化性能优异等优点有着广阔的应用前景,基于此研究者们在纳米结构调控、电解液优化和反应气组分控制等方面展开了大量研究以提升其在电催化CO₂RR中的催化活性和甲酸盐产物选择性。主要从催化剂结构设计、催化影响要素、催化反应机理等多角度综述了近期Cu_xS在电催化CO₂RR领域的研究进展,提出了Cu_xS在CO₂RR领域中主要面临的挑战;展望了Cu_xS族催化剂作为高活性、高稳定性二氧化碳电还原催化剂的发展前景。     

合成硫代壳聚糖黄原酸盐及其对Zn~(2+)的吸附研究

以自制壳聚糖和原乙酸三甲酯为原料进行缩醛反应,在NH3·H2O中进行交联、接枝、磺化等化合反应,制备以氮为中心硫代氨基壳聚糖黄原酸盐(DCX),采用扫描电镜(SEM)和红外光谱(FTIR)对DCX进行分析表征。研究DCX具有吸附性能较好的硫代氨基基团和网络结构用于吸附废水中的Zn2+,考察DCX对Zn2+吸附时间,不同离子浓度等因素对吸附热力学及动力学的耦合效应,实验证明,DCX已成功合成,DCX对Zn2+吸附符合Langmuir等温方程和准一级动力学方程,其活化能Ea为4.695 k J/mol,ΔH为4.89 k J/mol。     

工艺因素对硫铝亚铁酸盐熟料的结构和相组成的影响

本文依据试验，论述了研制硫铝亚铁酸盐熟料的工艺条件及其对水泥膨胀值和自应力的作用，并指出水泥物料构成与硫铝亚铁酸盐的相组成对膨胀水泥、应力水泥性能的影响。对企业研制开发新品种，改善现有产品性能有一定的指导作用。     

合成硫代壳聚糖黄原酸盐及其对Zn~(2+)的吸附研究

以自制壳聚糖和原乙酸三甲酯为原料进行缩醛反应,在NH3·H2O中进行交联、接枝、磺化等化合反应,制备以氮为中心硫代氨基壳聚糖黄原酸盐(DCX),采用扫描电镜(SEM)和红外光谱(FTIR)对DCX进行分析表征。研究DCX具有吸附性能较好的硫代氨基基团和网络结构用于吸附废水中的Zn2+,考察DCX对Zn2+吸附时间,不同离子浓度等因素对吸附热力学及动力学的耦合效应,实验证明,DCX已成功合成,DCX对Zn2+吸附符合Langmuir等温方程和准一级动力学方程,其活化能Ea为4.695 k J/mol,ΔH为4.89 k J/mol。     

有机硫类净水剂的合成及性能评价

利用多乙烯多胺、己二酸、二硫化碳等合成了二硫代氨基甲酸盐型净水剂,并对药剂作用机理进行探讨。实验结果表明:向含聚污水中投加50 mg/L该药剂,除油率达63%,除浊率可达90%,悬浮物去除率达87%,COD去除率达54%,且具有一定的杀菌缓蚀性能。     

Elastohydrodynamics of concentrated suspension with generalized newtonian fluid medium

Lubrication theory is applied to compute the deformation of two approaching particles suspended in a Generalized Newtonian fluid with linear elastic theory estimating deformation and force on the particles with respect to deformability δ. The relative viscosity of concentrated suspension with deformable particles in a Generalized New-tonian fluid is obtained for a simple cubic array configuration by using the results of deformation and force for two particles. Since the deformation of particles generates the freedom of moving particles geometrically, the suspension with deformable particles shows shear thinning behavior.     

分装容器对培养基热穿透、灭菌效果及灵敏度的影响

目的分析不同分装容器内培养基的热穿透、灭菌效果、灵敏度差异以及三者之间的相互关系。方法将硫乙醇酸盐流体培养基、胰酪大豆胨液体培养基分装于中试管和血浆瓶,用TMI温度探头比较两种容器的热穿透差异,用灭菌指示剂比较不同容器中培养基灭菌效果,灵敏度试验比较不同容器中培养基灵敏度。结果血浆瓶热穿透力中试管热穿透力;两种容器内培养基灭菌效果和灵敏度结果均无差异。结论 116℃蒸汽灭菌30 min不会破坏硫乙醇酸盐流体培养基、胰酪大豆胨液体培养基的有效营养成分,且能达到灭菌目的;两种培养基的热穿透性因分装容器种类而异,但灭菌效果、灵敏度与分装容器无直接关系。     

乾安油田储层敏感性评价

对乾安油田四个研究层位的储层岩心,进行室内储层敏感性的评价实验分析。评价分析各个层位的速敏、盐敏、水敏、酸敏、碱敏,结果为:泉头组是中等偏强速敏、强水敏、弱碱敏、酸敏特性的油层,嫩江组是具有强速敏、中等偏弱水敏、中等偏强酸敏、弱碱敏的敏感特性油层,姚家组油层是具有强速敏、强水敏、中等偏弱酸敏、弱碱敏的敏感特性油层,青山口组油层是具有强速敏、强水敏、弱酸敏、强碱敏的敏感特性油层。     

The melting of polymer granules through the use of a fluid medium

A process of melting individual polymer granules and then combining them into a homogeneous molten mass is examined. The granules are introduced into a high temperature fluid bath, heated as they move due to the polymer-fluid density difference and finally coalesce under the action of surface and gravity forces into a uniform polymer melt which can be used for extrusion, injection molding or other melt processing techniques. Theoretical models and analyses are presented to predict the time required to melt a granule in a particular polymer-fluid system and to have the molten granule coalesce into the developing mass of molten polymer. This latter time includes the time for the continuous phase fluid to drain between the approaching granule and the molten polymer-fluid interface and the time for the granule, once in contact with the interface, to be deposited to some specified depth in the bulk molten polymer. Design parameters for a particular embodiment of the process are presented. Experimental results obtained with a prototype device using mercury as the heat transfer medium are discussed.     

Linear displacement of a wetting fluid by an immiscible non-wetting fluid in a porous medium: A predictive algorithm

The linear displacement of a wetting fluid by an immiscible non-wetting fluid in a two-dimensional porous medium composed of a network of sites multi-connected by bonds has been simulated mathematically. The algorithm involves Monte Carlo decision making, random walks and principles of the percolation theory. The algorithm described in the present work successfully predicts the three distinct behaviours of immiscible displacement in porous media. This algorithm is tested against experiments available in the literature for two-dimensional porous media. The agreement between the numerical results and the experiments is very good.     

Evaluation of the influence of impurities on the oxygen sensitivity of monocrystalline antimony electrodes

Measurements are presented which show that the oxygen sensitivity of ultra pure (6N) monocrystalline antimony electrodes presents an improved reproducibility and constancy as compared with monocrystalline electrodes containing impurity inclusions in the electrode surface. The former electrodes also present a higher potential stability. The time to reach a pseudo-stable potential level (drift <0.6 mV/h) is also faster for this type of electrodes. The improved characteristics of the ultra pure electrodes are thought to be due to a uniform distribution of the anodic and the cathodic areas over the electrode surfaces. On the electrodes with impurity inclusions exposed in the surfaces, a high degree of local corrosion was noted. The oxygen sensitivity of the ultra pure electrodes, dE/d(log p_O2), was found to be 15.3 ± 0.7 and 15.7 ± 0.8 mV, 5 and 25 h after immersion of the electrodes in the electrolyte respectively.     

Parametric sensitivity of a fixed bed catalytic reactor: Cooling fluid flow influence

Temperature variation in a cocurrent cooling medium and its influence on the operation of a fixed bed catalytic reactor of the type used for orthoxylen oxydation is examined. Two characteristic regimes are found: a first regime where temperature shows a maximum at a finite axial reactor position (MFARP and a second regime where temperature is always increasing with the axial reactor coordinate: pseudoakiabatic operation (PO). The relative importance o ach operating mode may be observed by modifying the cooling flow. Two equations are derived from these findings. One of them estimates the limiting condition between MFARP temperature curves and PO curves. The other equation establishes an a prioi run away criterion for hot spot operation, being an extension of a previous formula derived by Van Welsenaere and Froment.     

小分子可循环压裂液应用效果评价

应用胍胶压裂液体系进行水平井压裂施工时,存在施工周期长,压裂返排液的运输、存储及处理安全环保风险高,成本压力大等问题。利用小分子可循环压裂液,可以做到水平井压裂液运输环节的安全可控、环保减排;达到降本增效、提升效率的目的。