科学发展经济构建和谐共青

共青城．位于庐山南麓、鄱湖之滨。现辖一区三镇．面积200平方公里．人口10万。京九铁路、昌九高速贯通南北．昌北机场、九江机场翼辅左右．水路经鄱阳湖可直抵长江。     

物理教学中先验概念的研究

学生在学习某一物理知识之前,头脑里并不是一片空白,或多或少都有一套自己的看法。他们从自身的实践中已形成了对各种事物的看法,并养成了他们独有的思维方式,用以来理解与解释日常生活中的各种现象.他们的这些看法和思维方式有的与正确的科学概念和思维方法并无冲突,但有的则与正确的科学概念与思维方式大相径庭。研究者给这些想法起的名称各不相同,国外称为Preconceptions、alternative frame-works等,国内将前者译为“前概念”、“先入思想”、“先验概念”,将后者译为“相异构想”、“不同思维框架”、“相异思维框架”,目前尚无统一的名称。在本文中我们暂且称学生的这些想法与思维方式为:“先验概念”与“相异思维框     

Development of an evaporation crystallizer for desalination of alkaline organic wastewater before incineration

A wastewater evaporation-desalination pretreatment method was introduced to remove the Na^＋ and K^＋ salts in volatile organic compounds （VOCs） wastewater before it was fed into the incinerator. VOCs in the wastewater were volatilized in the evaporation system and then the vapor was combusted in an incinerator. Simulated phenol wastewater containing sodium chloride was evaporated and concentrated and sodium chloride was crystallized in different parameters. The experimental results showed that the higher initial concentration of sodium chloride increases the ratio of volatilization of VOCs, which was due to the effect of “salting out” （a decrease in the solubility of the nonelectrolyte in the solution, or more rigorously, an increase in its activity coefficient, caused by the salt addition （Furter and Cook, 1967））. When evaporation speed was increased from 1.67 ml/min to 2.73 ml/min, the total removal coefficient of sodium chloride was about 99.88%-99.99%. This pretreatment procedure eliminates the slag phenomenon caused by Na^＋ and K^＋ salts during wastewater incineration, so the incinerator could operate continuously, and the wastewater evaporation could increase the heat value of wastewater, and the operation cost would be reduced.     

对高校体育教学实施素质教育的分析

讨论了目前我国高校体育教学中素质教育存在的问题,提出了高校体育教学改革与发展的对策。     

口腔脱落细胞DNA检验在刑事案件中的应用

报道了3起利用口腔脱落细胞成功进行DNA检验的案例,并对其中一些事项进行了探讨。这些案例表明,口腔脱落细胞DNA检验可以在刑事案件中发挥重要的作用。     

基于抖音短视频的高中地理混合式教学设计

充分挖掘抖音短视频中的地理教学素材,对教育信息化背景下创新课堂教学模式具有重要意义。文章基于抖音短视频的特点,以人地协调观的培养为设计主线,以“生态脆弱区的综合治理”为案例,剖析了将抖音短视频融入地理教学的策略,可为开展高中地理混合式教学提供案例支撑。     

化学教学与环保教育

化学与环境有着非常密切的联系,人类与环境的关系更加复杂,人类的生存和发展都依赖于对环境资源的开发与利用。在工业发展带给人类物质文明的同时,能源结构的变化,化学工业的发展,工业废水、废渣、废气的排放,农业的化肥、农药的不合理利用等,污染了人类赖以生存的环境,不断地危害人类的健康,