植物甾醇酯对饮食性高脂血症治疗作用研究

研究植物甾醇酯对高脂血症小鼠的治疗作用。连续饲喂健康、雄性昆明SPF小鼠高脂饲料21d,建立高脂血症小鼠模型。然后在喂基础饲料的同时,高脂模型组经口灌胃生理盐水,药物组经口灌胃血脂康药物(20mg/kg·d),其余3组分别灌胃植物甾醇乙酸酯、油酸酯、硬脂酸酯等三种植物甾醇酯(100mg/kg·d),观察植物甾醇酯对小鼠脂质代谢的影响。3种植物甾醇可不同程度地降低高脂血症小鼠的血清总胆固醇(TC)、密度低脂蛋白(LDL-C)、动脉硬化指数(AI),降低高血脂小鼠的肝重、肝脏TC和TG。其中,甾醇乙酸酯与甾醇油酸酯对小鼠高脂血症的治疗效果比较理想,且明显好于甾醇硬脂酸酯。实验结果表明,植物甾醇酯具有调节血脂作用,对高脂血症小鼠有良好的治疗效果。     

快速推注生理盐水在静脉硬化患者穿刺输液中的应用

目的观察快速推注生理盐水方法在解除静脉硬化患者输液堵塞中的效果。方法观察组31例,静脉硬化患者输液堵塞时,快速推注生理盐水至病人血管内,观察药液滴速情况;对照组23例,采用局部热敷、松止血带、调整针位等方法,并观察药液滴速情况。结果两组方法成功例数统计学比较有显著性差异(χ2=7.953,P=0.005),快速推注生理盐水方法能取得更好的效果。结论快速推注生理盐水方法能有效地解决静脉硬化患者输液堵塞,值得在临床护理工作中推广应用。     

如何使术后伤口愈合得更快

人体在伤口恢复期内，需要足够的水分摄入，以利于排出体内代谢产生的毒素，手术后的水分摄入多是以生理盐水或葡萄糖液体的形式输入，当然也可以根据医嘱适量饮水。除了水分之外，此时患者最需要的营养素是蛋白质，尤其是优质蛋白。     

醋酸林格氏液与生理盐水在小儿神经外科手术中的应用比较

目的:评价小儿神经外科手术患者应用醋酸林格氏液与生理盐水对血清晶体渗透压、血电解质、血乳酸及血糖的影响。方法:选取择期行颅内占位病变切除的患儿60例,年龄3⁶岁,ASAⅠ级或Ⅱ级,按随机数字表法分为两组各30例。A组患儿在诱导前,按照体重kg×5 m L以较快的速度输注醋酸林格氏液,B组患儿在诱导前,按照体重kg×5 m L以较快的速度输注生理盐水,以补充因术前禁食而存在的轻度或中度低血容量。维持量按4:2:1法则计算,并以每搏输出量变异度(SVV)指导6%羟乙基淀粉(130/0.4)的输注量。分别于麻醉诱导前(T1)、剪开硬膜即刻(T2)、手术结束时(T3)监测动脉血气、电解质、乳酸、血糖、尿素氮、肌酐水平,计算血清晶体渗透压。记录各个监测时间点的手术时间、血流动力学指标、总输液量、出血量、尿量。结果:两组手术时间、术中出血量、总输液量、尿量、血清晶体渗透压、血糖及乳酸水平比较差异均无统计学意义(P>0.05)。T2时刻点,A组血p H值较B组高,差异有统计学意义(P<0.05);T2、T3时刻点,A组血氯离子水平较B组低,差异有统计学意义(P<0.05)。结论:在小儿神经外科手术中,应用醋酸林格氏液较生理盐水无明显渗透压降低,不额外升高血糖,不含钙,可以减少高氯性代谢性酸中毒的产生,是相对安全的液体选择。     

生理盐水润滑下PEEK/WK复合材料的摩擦学性能

为研究生理盐水润滑条件下碳酸钙晶须含量、载荷大小、滑动速度因素对PEEK/CaCO3复合材料摩擦学性能的影响规律,并考察复合材料的摩擦学稳定性,在自制改性偶联剂处理晶须表面的基础上制备了PEEK/CaCO3复合材料,利用MMW1A立式万能摩擦磨损试验机对复合材料的摩擦学性能进行测试,用扫描电子显微镜(SEM)对磨损表面形貌进行扫描分析表征。结果表明,晶须含量对复合材料摩擦学性能影响明显,在0.9%的生理盐水润滑条件下PEEK/CaCO3复合材料随着晶须含量的增加,摩擦因数及比磨损率均呈现先减小后增大现象;当晶须质量分数为15%左右时,复合材料的摩擦因数达到最低值,同时比磨损量相对最低,复合材料与摩擦副的磨合过程相对平稳,具有较好的摩擦学性能,表现为粘着腐蚀磨损特征。外加载荷、滑动速度增大,材料的摩擦因数增大,比磨损率增加。     

Characteristics of CO<Subscript>2</Subscript> sequestration in saline aquifers

Storage of CO2 in saline aquifers is a viable option for reducing the amount of CO2 released to the atmosphere. This paper provides an overall review of CO2 sequestration in saline aquifers. First,the principles of CO2 sequestration are presented,including CO2 phase behavior,CO2-water-rock interaction,and CO2 trapping mechanisms. Then storage capacity and CO2 injectivity are discussed as the main determinants of the storage potential of saline aquifers. Next,a site section process is addressed considering b...     

中日培养基的比较

<正>食品卫生细菌学检验中,总要进行菌落总数的测定.因为菌落总数除主要可作为判定食品被污染程度的标志之外,还可以应用这一方法观察细菌在食品中繁殖的动态,以便对彼检样品进行卫生学评价时提供依据.目前,有些国家,如日本、美国等已使用国际通用标准法琼脂(Standard Plate Conut Agar)进行菌落总数的测定,而中国则仍采用营养琼脂(Nutrient Agar).为了解上述两种培养基的菌落检出效果和菌落发育情况,现以生肉为检测对象对中国营养琼脂     

Development characteristics and quantitative prediction of reservoir fractures in the Chaoyanggou oil field

The Chaoyanggou oil field is a fractured low-permeability reservoir, where the distribution of oil and gas is controlled by the distribution and development of fractures. Based on outcrop, drilling core, thin section and log data, the development characteristics of fractures in this area are described. On this basis, the degree of fracture development was predicted by quantitative analysis of fracture strength and numerical simulation. The result shows that four groups of structural fractures, i.e., in near NS, and EW directions and in due NW and NE directions, were developed in the reservoir, with the nearly NS and EW fractures dominant, which are the along bedding decollement fractures formed by compressive folding action, while low angle shear fractures are related to thrusts. These fractures are mainly formed in the reversed tectonic stage at the end of the Mingshui formation during the Cretaceous period. The degree of fracture development is controlled by such factors as lithology, stratum thickness, faults, folds and depth. The fractures are developed with a clear zonation and are best developed in the northern zone, moderately developed towards the south and poorly developed in the middle zone. These prediction results are in good agreement with interpretation results from logs.