Relationship between alanine aminotransferase levels and metabolic syndrome in nonalcoholic fatty liver disease

Objective:To investigate the relationship between alanine aminotransferase (ALT)levels and metabolic syndrome (MS)in nonalcoholic fatty liver disease(NAFLD).Methods:A total of 26527 subjects who received medical health checkup in our hospital from January 2005 to July 2007 were enrolled in the study.The diagnosis of fatty liver was based on ultrasound imaging.MS Was defined according to the criteria of the Adult Treatment Panel Ⅲ.ALT,triglyceride(TG),high density lipoprotein cholesterol(HDL-c),fasting plasma glucose(FPG),height,weight,waist circumference(WC),systolic blood pressure (SBP)and diastolic blood pressure(DBP)were measured in each subject to analyze the relationship between MS and ALT activity.Results:(1)The prevalence of NAFLD in men(30.94%)was significantly higher than that in women(15.65%);(2)The incidence of MS in NAFLD(33.83%)was significantly greater than that in non-NAFLD(10.62%);(3)Of the 6470 subjects with NAFLD,in the age-adjusted partial correlation analysis,there were statistically significant correlations between the ALT levels and most metabolic risk factors in each sex(P＜0.01),except that ALT levels had no correlation with HDL-c in women.Moreover,in the multiple stepwise regression analysis,SBP lost its significance,and WC,body mass index(BMI),age,DBP,TG and FPG were independently associated with ALT levels in both sexes (P＜0.05).HDL-c remained significant and was independently related to ALT leveis in men;(4)ALT levels were significantly higher in subjects with MS compared to those without MS(P＜0.001).Mean ALT levels increased with the number of MS cornponents in each sex (P.＜0.05 for trend).Conelusion:We found a strong relationship between ALT leveIs and MS in NAFLD and revealed that the cluster of MS components might be the predictor for ALT elevations.     

聚乙二醇——硫酸铵——对硝基偶氮氯膦体系萃取分光光度法测定微量钯的研究

本文研究了PEG-2000水溶液在硫酸铵存在下，分成液-液两相的条件和偶氮氯膦-PN及Pd(Ⅱ)配合物在该体系两相间的分配行为，实现了Pd(Ⅱ)的定量萃取分离．在此基础上建立了Pd(Ⅱ)-CPA-PN-PEG-2000非有机溶剂液-液萃取分光光度法测定微量钯的新方法．     

有机改性膨润土与沉积物中有机物的相互作用研究

以CTAB一次改性的天然膨润土为分散介质,以沉积物中芳香烃类化合物为目标分析物,对有机改性膨润土与待测沉积物的相互作用进行了实验研究,并以气相色谱/质谱法对提取物进行了分析.实验表明:改性膨润土对沉积物中的芳香烃类化合物具有很强的吸附能力,并与改性膨润土中有机碳含量有关;在提取沉积物中萘时,改性膨润土的使用显著提高了萘的回收率.因此,改性膨润土作为分散剂对提取过程的作用主要是净化作用和分散作用,可大大提高溶剂对沉积物中芳香烃类化合物的提取效率.     

茼蒿挥发性成分的分析

采用同时蒸馏-萃取的方法，对辽宁鞍山、铁岭、抚顺、阜新产的茼蒿的挥发性成分进行了提取，采用GC／MS方法对挥发油进行了鉴定，并对四产地的挥发油化学成分进行了比较．     

基于B/S的高校动态网站的设计与实现

以一具体的高校动态网站的规划与建设为例,运用ASP编程技术和Microsoft Access 2003数据库技术,以Windows 2000 Server or windows 2000 Advanced Server为运行平台,介绍了高校动态网站在日常管理工作中所发挥的巨大作用。包括学院信息自动发布系统,院系管理系统,学生成绩管理系统,电子公告板系统,用户注册模块,用户调查系统。针对当前多数高校的校园网建设,提出了加强“动态交互能力”以提高网站的应用效率的新思路。     

材料模拟软件在半导体物理教学中的应用研究

根据半导体物理课程的教学内容和特点引入材料模拟和计算软件Materials Studio(MS)进行辅助教学,使抽象的理论知识通过模拟软件和计算实验形象化地展示出来,引导学生应用模拟和计算软件深入了解半导体材料的结构和理论性质,在使用MS软件模拟计算过程中加深对课堂上理论知识的理解,提高学生的学习兴趣与积极性,在促进学生们半导体物理学习和掌握方面取得良好的实际效果。     

三种主要数据库系统特点比较

MS SQL Server、Sybase SQL、Oracle是目前应用广泛的3种大型关系型数据库系统.本文从查询语言、数据仓库的实现、安全管理机制以及数据库访问机制等方面对这三种数据库进行了分析比较,指出各自特点,并对不同的数据库应用给出建议.     

ASP文件查询安全的Access数据库方法的研究

通过示例介绍了如何用ASP(Active Server Pages)技术交互式处理用户HTML文件中表单登录信息如用户名及密码来限制对安全的Access数据库的访问.     

利用气相色谱/质谱联合技术研究核桃仁油脂酸组成

分别以乙醚、正己烷为溶剂,采用索氏提取法和超声波提取法对核桃仁中的核桃油进行提取。用两种甲酯化方法对核桃油进行处理,通过GC/MS方法分析了核桃油中脂肪酸的组成和含量。从核桃油中共检出13种脂肪酸,除亚油酸等5种文献报道过的主要成分外,还包括十四烷酸(肉豆寇酸)、十五烷酸、十六碳烯酸、十六碳二烯酸、十七烷酸、二十烷酸(花生酸)以及二十碳烯酸和二十碳三烯酸等8种含量较少的成分,约占核桃油脂肪酸总量的1.7%。     

Organic residue analysis of Egyptian votive mummies and their research potential

Vast numbers of votive mummies were produced in Egypt during the Late Pharaonic, Ptolemaic, and Roman periods. Although millions remain in situ, many were removed and have ultimately entered museum collections around the world. There they have often languished as uncomfortable reminders of antiquarian practices with little information available to enhance their value as artefacts worthy of conservation or display. A multi-disciplinary research project, based at the University of Manchester, is currently redressing these issues. One recent aspect of this work has been the characterization of natural products employed in the mummification of votive bundles. Using gas chromatography–mass spectrometry and the well-established biomarker approach, analysis of 24 samples from 17 mummy bundles has demonstrated the presence of oils/fats, natural waxes, petroleum products, resinous exudates, and essential oils. These results confirm the range of organic materials employed in embalming and augment our understanding of the treatment of votives. In this first systematic initiative of its kind, initial findings point to possible trends in body treatment practices in relation to chronology, geography, and changes in ideology which will be investigated as the study progresses. Detailed knowledge of the substances used on individual bundles has also served to enhance their value as display items and aid in their conservation.