厦门港区残存鼠群落结构的研究

目的 对厦门港区4种类型码头即集装箱码头，散货码头，煤码头和客运码头的残存鼠群落结构进行研究。以探索防制对策。方法 夹夜法。结果 集装箱码头和散货码头残存鼠群落结构相似。为自JuQing 褐家鼠 黄胸鼠；煤码头为臭JuQing 黄胸鼠 黄毛鼠；客运码头以臭JuQing为主。臭JuQing是港区的优势鼠种。结论 不同类型码头的残存鼠生物多样性指数各不相同。以集装箱码头最高。集装箱码头和散货码头鼠类群落间相似性指数最高。     

认知"连贯性"与超文本设计

线性文本与超文本的区别,不只在于文本的结构方式、技术实现方式、阅读写作方式和存储记忆方式等方面,还在于文本的媒体表现方式.狭义的超文本,意指跨越文本局限、打破线性结构的语篇组织方式;广义的超文本,则是指运用超文本标示语言(HTML),经数字化编辑而成的包括文本、音乐、图像、动画、影视等一切表意媒体的信息集合(超文本语篇).因此,超文本连贯性,除了具有线性文本的特征,更有其自身的特点,以视觉原理为基础的数字化修辞手段便是主要手段之一.     

聚苯醚热固性改性及其性能研究

通过溴化聚苯醚和格利雅试剂反应，将不饱和基团烯丙基引入聚苯醚中实现其热固性改性，由^1H-NMR和FTIR进行结构表征。确定了烯丙化聚苯醚的固化工艺，并对其固化产物性能进行测试。结果表明：按合成新工艺制备的热固性聚苯醚，其固化产物具有优异的介电性能(低介电常数、低介电损耗因子)，良好的耐溶剂性能和低吸湿性。     

沸石分子筛材料中次级孔的研究——Ⅱ.Y型沸石晶内次级孔对扩散的影响

以含有次级孔的沸石的晶内扩散为研究对象,对来源于同一NaY母体的一组改性Y型沸石,进行了孔结构分析和正戊烷的扩散系数的测定。得到了具不同次级孔量的Y型沸石晶内扩散性能变化的规律。并采用随机游动方法对实际的Y型沸石晶内扩散进行模拟,得到了与实验测定一致的结果,从而可以对有次级孔的Y型沸石的晶内扩散做定量的估计。     

~(27)AINMR对碱式氯化铝的研究

实验室制得的碱式氯化铝,用~(27)Al NMR进行分析,发现在众多聚合体中存在[AlO_4Al_(12)(OH)_(24)(H_2O)_(12)]~(7+)离子,其化学位移相对于六水合铝离子[Al(H_2O)_6]~(3+)的零位移为δ=63ppm,试铁灵定时比色法对其存在进行了验证。研究了反应条件如酸浓度、铝酸当量比和陈化时间对产物组成及质量的影响,得出最佳条件为盐酸浓度16%,铝酸当量比为1:0.5,陈化时间为50h左右。     

Antimutagenic activities of naturally occurring polyamines in Chinese hamster ovary cells in vitro

Spermine and spermidine, ubiquitous polyamines present in bacteria and animal cells, are also involved in cell growth. Since they interact with the double helix, they can stabilize the DNA molecule. Recent evidence of the antimutagenic and anticarcinogenic capacity of spermine has focused attention on the mechanism(s) by which such agents can protect cells from induced damages. In the present paper we show the ability of spermine and spermidine to decrease the level of sister chromatid exchanges induced in Chinese hamster ovary cells cultivated in vitro, by treating them with Psoralen + UVA irradiation (able to induce mainly monoadducts and DNA cross-links). Two different mechanisms of polyamine action can be invoked to explain the preservative activity of this class of agents.     

膳食结构的变化对脂肪肝患者疗效观察

目的 通过营养干预改变脂肪肝患的膳食结构和生活方式，并观察其疗效。方法 营养干预措施采用询问法登记摄入食物的种类和数量，制订膳食原则及编制食谱。健康教育进行营养知识讲座及咨询活动。结果 通过营养干预脂肪肝患改变了原有的膳食结构及饮食习惯，能量摄入和消耗处于动态平衡；增加粗粮、蔬菜和鱼禽类等食品的摄入量，动物性脂肪摄入减少；53．1％脂肪肝患有好转，46．2％超重或肥胖的人体重恢复到标准体重范围内。结论 普及营养知识，养成良好的饮食和生活习惯，防止食源性疾病的发生。     

耒阳市1093例不同年龄人群缺锌状况的调查分析

[目的]探讨人体内锌缺乏与年龄是否相关。[方法]采集头发用强酸消化后，利用北京振教科贸有限公司产WL-3微量元素分析仪进行检测。[结果]我们发现儿童的缺锌率高于青少年和成人人群，具有显著的统计学意义（P〈0．05），其中3～5岁时的儿童的缺锌率达到了79．1％。而青少年与成人之间的缺锌率并无差异（P〉0．05），分别为20．5％和18．4％。[结论]因膳食结构不当引起锌缺乏在儿童中常见，由此我们应当根据不同年龄阶段特点进行不同的补锌措施。     

Improved anchorage in osteoporotic vertebrae with new implant designs.

The goal of our study was to evaluate two newly developed implant designs and their behavior in terms of subsidence in lumbar vertebral bodies under cyclic loading. The new implants were evaluated in two different configurations (two small prototypes vs. one large prototype with similar load-bearing area) in comparison to a conventional screw-based implant (MACS TL). A pool of 13 spines with a total of 65 vertebrae was used to establish five testing groups of similar bone mineral density (BMD) distribution with eight lumbar vertebrae each. In additional to BMD assessment via dual-energy X-ray absorptiometry, cancellous BMD and structural parameters were determined using a new generation in vivo 3D-pQCT. The specimens were loaded sinusoidally in force control at 1 Hz for 1000 cycles at three load levels (100, 200, and 400 N). A survival analysis using the number of cycles until failure (Cox regression with covariates) was applied to reveal differences between implant groups. All new prototype configurations except the large cylinder survived significantly longer than the control group. The number of cycles until failure was significantly correlated with the structural parameter Tb.Sp. and similarly with the cancellous BMD for three of five implants. In both large prototypes the cycle number until failure significantly correlated with the preoperative distance to the upper endplates. Although the direct relationship between bone structure or density and mechanical breakage behavior cannot be conclusively proven, all the prototypes adapted for poor bone structure performed better than the comparable conventional implant.     

应用电泳技术分析飞行员富含三酰甘油脂蛋白亚组分及其代谢特征

目的 分析富含三酰甘油脂蛋白(TRLs)分子组成及其代谢特征.方法应用脂蛋白电泳技术,对30例飞行员空腹和脂肪负荷餐后血浆做脂蛋白分析,以扫描图面积表示各亚组分构成,观察脂蛋白亚组分变化特点.结果 30例飞行员TRLs清除延迟发生率46.67%.TRLs分子脂蛋白亚组分由极低密度脂蛋白(VLDL)、中密度脂蛋白(IDL)、低密度脂蛋白(LDL)、乳糜微粒(CM)和脂蛋白a[LP(a)]组成.TRLs清除延迟典型扫描图特征为LDL左侧区面积增高,呈双峰或多峰.LDL、VLDL区面积增高,伴有高密度脂蛋白(HDL)面积降低.结论 高三酰甘油血症致动脉粥样硬化作用是在代谢水平异常所致的TRLs清除延迟,TRLs清除延迟是核心环节.