太极拳对高脂血症老年人骨密度影响变化趋势

目的:探讨太极拳运动对高血脂症老年人群高脂血脂以及骨密度的变化趋势。方法:通过对40名患有高脂血症老年人进行为期6个月的太极拳运动干预。从各个指标的变化来观察太极拳对高脂血症以及骨质疏松起到的预防作用。结果:锻炼前后老年人高脂血症、骨密度值均发生了显著性的改变(P0.05或P0.01)。即太极拳运动对高脂血症老年人骨质疏松起到了良好的效果。结论:太极拳运动可有效改善血脂异常,提高骨密度。可作为防治高血脂老年人骨质疏松安全有效的手段。     

优秀女子花样滑冰运动员骨密度特征及适应性研究

运用文献资料法、逻辑分析法、测试法、数理统计法,对36名13~22岁单人、双人和冰上舞蹈花样滑冰优秀女子运动员(国家一级以上)骨密度差异性进行研究。结果显示:能量、维生素D和钙摄入对不同花样滑冰项目优秀女子运动员骨密度有着明显影响;女子单人滑运动员整个身体、腿和骨盆的骨密度明显高于冰上舞蹈运动员的骨密度;双人滑冰运动员骨盆骨密度高于冰上舞蹈选手;女子单人滑和双人滑冰运动员骨密度高于冰上舞蹈运动员骨密度。     

辽河流域与辽东半岛新石器遗迹及其稻作、贝丘、积石冢、大石棚文化

在紧邻辽河干流的左翼,突出于黄、渤二海之间,有一块特殊的地域,由于其三面环海,地处辽河之东,故有辽东半岛之称。又因为辽东半岛地域实际上是夹在东有鸭绿江口,西有辽河河口的地域之间,其文化的面貌既具有辽河特征也具有鸭绿江流域特点,因此学术界常常把辽东半岛的文化作为独立的单元加以研究。文章提出辽东半岛的新石器时代至青铜时代的文化面貌一直不是孤立的。从总体上来看,其依然属于辽河流域文明的研究范畴。因此,文章把辽河流域与辽东半岛新石器时代及青铜时代具有特点的文化遗迹联系起来,并对其进行比较和研究。其目的就是希望学术界,把辽东半岛的早期文化也纳入到辽河流域文明范畴的视野中。因篇幅有限,文章只选择了辽东半岛的稻作文化、贝丘文化、积石冢和大石棚这四种文化予以概要的介绍。     

The Liao River Basin and East Liao Peninsula＇s Neolithic Sites Along With the Rice Planting,Beiqiu,Stone Tombs,and Large Stone Canopy

在紧邻辽河干流的左翼,突出于黄、渤二海之间,有一块特殊的地域,由于其三面环海,地处辽河之东,故有辽东半岛之称。又因为辽东半岛地域实际上是夹在东有鸭绿江口,西有辽河河口的地域之间,其文化的面貌既具有辽河特征也具有鸭绿江流域特点,因此学术界常常把辽东半岛的文化作为独立的单元加以研究。文章提出辽东半岛的新石器时代至青铜时代的文化面貌一直不是孤立的。从总体上来看,其依然属于辽河流域文明的研究范畴。因此,文章把辽河流域与辽东半岛新石器时代及青铜时代具有特点的文化遗迹联系起来,并对其进行比较和研究。其目的就是希望学术界,把辽东半岛的早期文化也纳入到辽河流域文明范畴的视野中。因篇幅有限,文章只选择了辽东半岛的稻作文化、贝丘文化、积石冢和大石棚这四种文化予以概要的介绍。     

南京地区610名公务员骨密度的年龄和性别特征分析

以南京地区610名公务员为研究对象,使用Sonost 2000超声骨密度仪测试受试者跟骨骨质状态的T值、Z值、骨强度指数、骨折风险等指标。结果显示:男、女性同性别40～50岁年龄组的骨密度状态指标中的T值、骨强度指数和骨折风险,与30～40岁年龄组均有显著差异(P<0.05或P<0.01),男性50～60岁年龄组的Z值的绝对值明显小于其他年龄组(P<0.01);同年龄组男、女性在各指标上均无显著性差异(P>0.05),男性各项骨密度指标值均优于同龄组女性。研究男、女性公务员骨密度的衰减明显期,可为其提高骨密度或防止骨密度衰减提供适宜的干预时机。     

云南腾冲火山柱状节理物理性能分析及研究

对云南腾冲火山遗址遗留的柱状节理物理性能分析。通过实验得到了密度、热导率方向、放射性等一些数据。由拉曼光谱从分子振动层面,探索了内部基本情况,对进一步研究火山柱状节理提供了参考。     

Biochemical Effects of Lead Exposure on Battery Manufacture Workers with Reference to Blood Pressure, Calcium Metabolism and Bone Mineral Density

Lead is one of the most widely scattered toxic metals in the environment and used by mankind for over 9,000 years. Lead in the environment may be derived from natural or anthropogenic sources. In humans, lead can cause a wide range of biological effects depending upon the level and duration of exposure. The purpose of this study was to find out the effect of lead exposure on systolic and diastolic blood pressure, serum calcium, ionized calcium, phosphorus, parathyroid hormone and vitamin D and examine the overall effect of all these parameters on the bone mineral density of battery manufacture workers. For this study ninety battery manufacture workers were selected and divided in three groups depending upon duration of lead exposure. Group I—workers with duration of lead exposure 1–5 years, Group II—workers with duration of lead exposure 6–10 years and Group III—workers with duration of lead exposure more than 10 years. Each group consisted of thirty workers. Thirty age matched healthy control subjects were taken for comparison. Demographic, occupational and clinical data were collected by using questionnaire and interview. The venous blood samples were collected from the study groups and normal healthy control group. At the time of blood collection random urine samples were collected in amber coloured bottles. The biochemical parameters were estimated by using standard assay procedures. Statistical analysis of the data was done using independent student‘t’ test for parametric variables. Values were expressed as mean ± standard deviation (SD). P values of 0.05 or less were considered to be statistically significant. The blood lead levels and urinary lead levels of all workers were significantly increased (P < 0.001) in proportion to the duration of lead exposure as compared to controls. Systolic and diastolic blood pressure were significantly raised (P < 0.001) in all three study groups of battery manufacture workers as compared to controls. Serum Calcium, Ionized calcium, phosphorus were significantly decreased (P < 0.001) in all the three study groups. Serum vitamin D levels were lowered (P < 0.01) and serum PTH was increased (P < 0.01) in workers as compared to controls. The results of this study clearly indicate that the absorption of lead is more in these workers which adversely affects blood pressure, disturbs calcium and phosphorus metabolism which further impairs mineralization of bone resulting in decreased bone mineral density observed in these workers. Lead toxicity is still persistent in battery manufacture workers though they are using sophisticated techniques in these industries. There is a need to protect the workers from the health hazards of occupational lead exposure.     

技术创新网络知识增长过程建模与仿真研究

基于国内外现有研究成果,针对网络密度对技术创新网络知识增长的影响机理,从知识扩散与知识创新两个方面进行了理论分析,提出了网络密度与技术创新网络知识增长呈倒U型关系的研究假设。应用基于多主体(Agent)的建模方法建立一个基于多Agent的技术创新网络知识增长过程模型,采用NetLogo仿真平台进行仿真,对研究假设进行检验。研究结果表明:网络密度具有双面性,太高或太低都不利于技术创新网络的知识增长;网络密度过高往往先抑制技术创新网络知识扩散,随后进一步提高再是阻碍知识创新。     

大学女生身体密度回归模型的实证研究

依据浙江树人大学大学女生的身高、体重及其派生指标,运用科学的统计方法建立计算身体密度的 一元回归和多元回归模型。运用方差分析对各种回归模型预测值与实际测量值进行比较研究。结果显示, 多元回归模型的预测值与实际测量值无差异,P>0.90水平。为完善大学生体质健康评价指标提供一定的理 论依据。     

金属铌声子发散谱、电声耦合和超导转变温度的研究(英文)

采用第一原理密度泛函理论和相对论解析赝势,在局域密度近似框架下研究了过渡金属铌的电子结构、声子发散谱、电声耦合和超导性质。计算给出电声耦合常数和超导转变温度分别为1.24和9.16K。文章得到的结果与可得的实验和理论数据符合的很好,说明相对论解析赝势用于铌的电子、振动和超导性质方面的模拟是合适的。