影响血液尿素测量值的实验室因素

观察了实验室自然光照对二乙酰一肟法测定血尿素结果的影响。发现光照对测量结果有显著影响。提示测量过程中要避免室外光直接照射     

以PVC膜碘离子电极测定大米中碘的含量

本文报导在 0 .0 5mol/L硼砂缓冲溶液中 ,以PVC膜碘离子电极直接电位法测定大米中碘的含量 ,方法灵敏度为 3× 10 - 7mol/L ,线性范围为 5× 10 - 7～ 10 - 3mol/L ,以该方法对蒸水沿岸地方的大米中的碘测定 ,分析表明 ,该地区中碘含量处在 0 .2～ 0 .6mg/kg范围 .     

少年女子垒球运动员选才判别分析的探讨

通过对北方赛区（ 沈阳） 全国少年女子垒球夏训比赛选出的６ 个队,按国家体委所规定的运动年限、跑全垒、垒球掷远和接力传球等４ 项指标进行测试、分析和研究,为全国少年女子垒球运动员的选才提供参考依据．     

The principle of calibration using the ionic current —A new calibration method for electro-magnetic flowmeters

An equivalent relationship between electro-magnetic flowmeters (EMFs) and the Hall effect is discussed in principle and three equivalent conclusions about their measuring equations are derived. Thereby, the calibration using the ionic current (CUIC) is introduced to the calibration of EMFs in a special Hall effect system. A basic system with these equations is specially given and discussed for realizing the method. Two key points about CUIC are proved by a simple experiment.     

加强市场农业的信息引导

针对农民在计划农业向市场农业转轨过程中面临的市场观念、经营方式、信息意识、信息服务等问题,指出加强农业信息引导的必要性,提出加快发展市场农业的信息对策。     

桔皮中果胶的提取

报道了一种从桔皮中提取果胶的方法,探讨了酸度、温度、时间对收率的影响。     

History and Philosophy of Science as a Continuation of Science by Other Means

History and philosophy of science can serve the function of investigating scientific questions that are excluded by science itself. Because many things need to be protected from questioning and criticism in specialist science, its demonstrated effectiveness is also unavoidably accompanied by a loss of knowledge and a degree of dogmatism. History and philosophy of science can ameliorate this situation by working as a shadow discipline complementing specialist science in the production of knowledge about nature. In this enterprise the connection between philosophy of science and history of science is essential, since the questions that get consigned to the realm of philosophy are often, and not accidentally, the same ones buried in the historical record of past science. Some examples are given illustrating the complementary mode of history and philosophy of science, and its relations to other modes of study in history of science and philosophy of science are also examined.     

论老子的价值立场

道家开山老子是一个“天人合一”论的倡导者 ,他的思想中兼有“事天”和“治人”两个方面 ;“天”是他的参照系 ,“人”是他的落脚点。抬高天道的价值和强调人间的心术在老子的思想构架中获得了完满的搭配     

Child Effects on Parental Negativity: The Role of Heritable and Prenatal Factors

This study examined two possible mechanisms, evocative gene–environment correlation and prenatal factors, in accounting for child effects on parental negativity. Participants included 561 children adopted at birth, and their adoptive parents and birth parents within a prospective longitudinal adoption study. Findings indicated child effects on parental negativity, such that toddlers’ negative reactivity at 18 months was positively associated with adoptive parents’ over-reactive and hostile parenting at 27 months. Furthermore, we found that child effects on parental negativity were partially due to heritable (e.g., birth mother [BM] internalizing problems and substance use) and prenatal factors (e.g., BM illicit drug use during pregnancy) that influence children’s negative reactivity at 18 months. This study provides critical evidence for “child on parent” effects.     

体力活动、静坐行为与学前儿童体质健康的关系

体力活动和静坐行为是影响儿童早期体质健康的重要因素。本研究以152名学前儿童为被试,使用三轴加速度计测量体力活动和静坐行为,使用儿童型人体成分分析仪测量身体成分,使用《国民体质测定标准(幼儿部分)》测评身体素质,使用相关分析、多元回归分析和等时替代回归分析对它们之间的关系进行探究,结果发现在控制了性别、年龄、城乡、佩戴时间和静坐行为等因素后,中高强度体力活动尤其是高强度体力活动对去脂体重指数和身体素质(十米折返跑、立定跳远、双脚连续跳、走平衡木)依然具有显著影响;高强度体力活动替代其他强度体力活动或不同强度体力活动替代静坐行为后,去脂体重指数均有所提升;身体素质变化仅在高强度体力活动替代其他强度体力活动和静坐行为时具有方向一致性和显著性。家长和教师应充分重视中高强度体力活动尤其是高强度体力活动与学前儿童体质健康的紧密联系,促进学前儿童静坐行为和低强度体力活动向中高强度体力活动适度转化,以提升学前儿童下肢肌肉力量素质和灵敏素质等方面的体质健康水平。