氧化离子水消毒剂杀灭微生物效果及毒性检测

氧化离子水消毒剂系将含氯消毒剂颗粒与离子激活剂（酒石酸、硼酸）分二元包装．使用时,溶于水形成氧化还原电位为９９６ ｍＶ,ｐＨ ４．５０,含有效氯１８０ ｍｇ／Ｌ的溶液。采用悬液试验法,对其杀灭微生物效果进行了检测。结果,以其原液作用 ２０ ｍｉｎ,对枯草杆菌黑色变种芽胞杀灭率为 １００％,可破坏ＨＢｓＡｇ抗原性。以其含有效氯９０ ｍｇ／Ｌ的溶液作用１０ ｍｉｎ,对大肠杆菌、金黄色葡萄球菌的杀灭率均为１００％。菌悬液含体积分数为５０％的小牛血清,对其杀灭金黄色葡萄球菌的效果无明显影响。毒性试验表明,该消毒剂对雌、雄性小鼠口服 ＬＤ５０＞ ５．０ ｇ／ ｋｇ,对豚鼠皮肤刺激反应积分为 ０,小鼠骨髓红细胞微核试验为阴性。     

异鼠李素及橙皮甙抑制LDL氧化修饰作用的研究

目的:研究黄酮类中药异鼠李素及橙皮甙是否具有抑制LDL氧化修饰的作用。方法:按一次性密度梯度超速离心法分离人血清LDL,分别加入5.0μmol/L异鼠李素及橙皮甙与LDL温育3 h,然后利用Cu2 介导体外氧化修饰脂蛋白的方法,观察LDL氧化修饰不同时间,其A234、REM、TBARS及蛋白质羰基的动力学改变,并与对照组比较。结果:Cu2 介导LDL氧化修饰时,在2、4、6、8、12及24 h后,其A234、REM、TBARS及蛋白质羰基含量均逐步增加;加入5.0μmol/L异鼠李素及橙皮甙的实验组,Cu2 LDL的氧化修饰分别延迟2~4 h和2 h,其A234、REM、TBARS及载脂蛋白羰基含量较对照组降低;异鼠李素实验组分别较对照组降低23.5%~40.4%、20.5%~37.7%、18.6%~30.3%及20.1%~52.4%(P<0.001);橙皮甙实验组分别降低11.1%~21.2%、9.2%~28.3%、13.7%~21.3%及5.0%~43.8%(P<0.001,P<0.01,P<0.001及P<0.05)。结论:异鼠李素及橙皮甙均可抑制Cu2 诱导的LDL的氧化修饰,且异鼠李素的抗氧化作用较及橙皮甙强。     

氧化低密度脂蛋白诱导心肌细胞LOX-1表达的研究

目的探讨氧化低密度脂蛋白（ox-LDL）对心肌细胞血凝素样氧化低密度脂蛋白受体1（LOX-1）表达的影响。方法原代培养乳鼠心肌细胞,分别用不同浓度的ox-LDL（0,10,20,50,100μg/ml）与心肌细胞作用不同时间（0,6,12,24,36h）。用RT-PCR测定LOX-1mRNA表达水平,Western blot测定LOX-1蛋白表达水平。结果不同浓度的ox-LDL均可诱导心肌细胞LOX-1mRNA和蛋白表达,与对照组比较有显著性差异（P〈0.05）,在10-50μg/ml的剂量范围内存在明显的剂量-效应关系,各组间比较有显著性差异（P〈0.05）。随着ox-LDL与心肌细胞作用时间的延长,心肌细胞LOX-1mRNA和蛋白表达增加,与对照组比较差异具有显著性（P〈0.05）,在6～24h内呈明显的时间-效应关系,各组间比较有显著性差异（P〈0.05）。结论 ox-LDL可诱导心肌细胞LOX-1表达,并在一定范围内随ox-LDL浓度增加和作用时间延长而表达增强。     

Modification, translation and adaptation of questionnaires should copyright laws be observed?

This commentary is intended to start a discussion about whether people should be allowed to modify, translate, adapt or sell copyrighted questionnaires without the permission of the developer (copyright-holder).     

Predictors of Remission and Relapse of Diabetes after Conventional Gastrectomy for Gastric Cancer: Nationwide Population-Based Cohort Study

1. Download : Download high-res image (325KB)
2. Download : Download full-size image

     

Use of the timeout procedure in a child psychiatry inpatient milieu: Combining dynamic and behavioral approaches

An observational study of naturally-occurring timeouts was conducted in a child psychiatry inpatient milieu over a three-month period. Data from nine children were assessed. Child negative behavior was generally low in the timeout, processing, and return to activity phases. Results from individuals were discussed in terms of their diagnosis and events taking place on the unit. Staff behavior during timeouts were also described. The crucial role of processing after the timeout was discussed.     

Oxidized low density lipoproteins, statin therapy and severity of coronary artery disease

BACKGROUND: The impact of statin therapy on the association between circulating levels of oxidized low density lipoproteins (OxLDL) and severity of coronary artery disease (CAD) has not been studied. METHODS: OxLDLs were measured in 687 patients with angiographically proven CAD (320 patients, 46.6% on statin therapy and 367 patients, 53.4% not on statin therapy on admission) using the Mercodia Oxidized LDL Enzyme-Linked Immunosorbent Assay (ELISA). RESULTS: Patients on statin therapy had lower levels of OxLDL (median [interquartile range]; 63.9 U/L [53.9; 79.8] versus 72.3 U/L [58.4; 86.1], P<0.001) and C-reactive protein (3.0 mg/L [1.2; 6.6] versus 4.0 mg/L [1.7; 13.1], P<0.001) than patients not on statins. Multivariable analysis showed that statin therapy was an independent predictor of lower levels of OxLDL (P=0.0001). In univariate analysis, OxLDL level did not differ significantly among the patients with 1-, 2-or 3-vessel disease (70.5 U/L [57.5; 85.6], 66.3 U/L [53.8; 82.6] and 68.2 U/L [57.0; 83.4], respectively, P=0.26). Multivariable logistic regression analysis showed that OxLDL was an independent correlate of angiographic severity of CAD (P=0.04) and that there was an interaction (P=0.038) between statins and OxLDL in that the increased levels of OxLDL were associated with more extensive CAD. CONCLUSION: Patients with CAD who receive statins have lower levels of OxLDL and an attenuation of the relationship between circulating levels of OxLDL and CAD severity compared with patients who do not receive statins.     

氧化型低密度脂蛋白与糖尿病肾病关系的研究进展

糖尿病患者因脂代谢异常导致氧化型低密度脂蛋白水平的升高。氧化型低密度脂蛋白通过脂代谢途径、炎症损害及血流动力学因素造成肾脏内皮细胞、系膜细胞及肾小管细胞损伤,促进糖尿病肾病的发生。改变氧化型低密度脂蛋白受体的表达可影响氧化型低密度脂蛋白对肾小管的损害。血清氧化型低密度脂蛋白含量对糖尿病肾病早期诊断及临床治疗的评估有一定的应用价值。     

代谢综合征患者血管内皮功能与氧化低密度脂蛋白的关系

目的探讨代谢综合征（MS）患者血管内皮功能与氧化低密度脂蛋白（OX-LDL）的关系。方法选择55例健康体检者为正常对照组,60例MS患者为MS组。同时检测2组血压、血糖、血脂、糖化血红蛋白水平,分别测其血管内皮功能及OX—LDL,计算体质指数、腰臀比。结果内皮依赖性血管舒张功能与总胆固醇、甘油三酯、低密度脂蛋白胆固醇及OX—LDL呈负相关（分别为r=-0．24、r=-0．26、r=-0．29及r=-0．73,P〈0．05或P〈0．01）;与高密度脂蛋白胆固醇呈正相关（r=0．30,P〈0．05）。结论MS患者血管内皮功能损伤与OX-LDL升高有关。应对MS患者常规检测OX—LDL。