稀土化学与灯用三基色荧光粉的发展

本文简要介绍了稀土概况及发光机理，概述了灯用稀土三基色蒌光粉的发展应用情况，及其市场发展现状与前景。     

细菌群体感应机制与动植物病原菌的致病力

N 酰基高丝氨酸内酯 (AHLs)作为信号分子介导的细菌群体感应机制参与许多生物学功能的调节 ,当侵染动植物寄主组织的病原菌繁殖到一定量时 ,细菌本身产生的AHLs积累到临界浓度 ,AHLs与胞内特异受体结合 ,启动致病因子的表达。利用AHLs降解酶和AHLs类似物的特性 ,干扰和破坏病原菌的AHLs 群体感应机制 ,将为利用现代生物技术防治此类细菌病害开辟了一条全新的途径     

碱土金属化合物性质实验的微型化研究

系统探讨碱土金属氢氧化物及其盐的溶解性、碱土金属元素的焰色反应、碱土金属离子的分离和鉴定等微型化实验，并将其设计成新的微型实验应用于无机化学实验教学，效果良好。     

Impact of nuclear actin on the prophase chromosome construction of Physarum polycephalum

A cell-free system efficiently promoting mitosis has been developed using the precise natural synchronous plasmodium of Physarum polycephalum. The content changes of nuclear cyclin B were exploited to represent the prophase process of Physarum polycephalum. The possible function of nuclear actin on chromosome construction was investigated by detecting the content changes of nuclear cyclin B in the late G2 phase nuclei treated with cytochalasin B and incubated in the cell-free system. Our results showed that nuclear actin plays an important role in the process of the chromosome construction.     

The effects of the guide field on the structures of electron density depletions in collisionless magnetic reconnection

Two-dimensional particle-in-cell simulations are performed to investigate the formation of electron density depletions in collisionless magnetic reconnection.In anti-parallel reconnection,the quadrupole structures of the out-of-plane magnetic field are formed,and four symmetric electron density depletion layers can be found along the separatrices due to the effects of magetic mirror.With the increase of the initial guide field,the symmetry of both the out-of-plane magnetic field and electron density depletion layers is distorted.When the initial guide field is sufficiently large,the electron density depletion layers along the lower left and upper right separatrices disappear.The parallel electric field in guide field reconnection is found to play an important role in forming such structures of the electron density depletion layers.The structures of the out-of-plane magnetic field By and electron depletion layers in anti-parallel and guide field reconnection are found to be related to electron flow or in-plane currents in the separatrix regions.In anti-parallel reconnection,electrons flow towards the X line along the separatrices,and are directed away from the X line along the magnetic field lines just inside the separatrices.In guide field reconnection,electrons can only flow towards the X line along the upper left and lower right separatrices due to the existence of the parallel electric field in these regions.     

西部地区不同层次高职院校教师职业压力现状研究

通过自编《高等职业技术学院教师职业压力源问卷》调查了西部地区7所不同层次高等职业院校教师的职业压力状况,发现高职院校中,学院的层次是影响教师职业压力的重要因素.     

多关节机械臂的运动学分析与综合

本文提出了多关节机械臂运动学正问题的递推公式,并利用这些递推公式方便地解决了多关节机械臂的运动学逆问题,不仅物理概念清晰,而且无需导出其显式表示.文中所述方法简单、新颖,通用性强,适用于计算机编程,对多关节机械臂的设计与控制都有一定的指导作用.     

厂网分开条件下购电配电计划的优化方法

将电力系统描述为一个由发电节点和用电节点两类构成的二分图·在电力系统的经济决策和系统运行技术分析可以分别进行的前提下,提出一种电力市场下电力购买与配送计划优化的模型,基于图论理论给出模型解存在的必要条件·并提出基于线性规划的模型求解算法·根据各类节点的电量和资金平衡条件,构造包含节点电价的线性方程组,从而构成确定各节点成本电价的方法·上述方法对大量来源于实际电力系统购配电计划模拟问题进行了计算,取得了满意的结果·     

茶叶中多种农药残留的气相色谱法测定

采用氟罗里硅土／活性炭混合柱柱层析净化方法，以HP－5毛细管柱、电子捕获检测器（ECD）的气相色谱（GC）方法测定了茶叶中六六六、三氯杀螨醇、滴滴涕、联苯菊酯、甲氰菊酯、氯氰菊酯和氰戊菊酯等多种农药残留。所建立方法的分析结果与外检结果基本一致。方法具有溶剂使用量少、净化效果好、操作简便、快速等特点，可满足茶叶中多种农药残留检测的需要。     

建筑节能势在必行

阐述了建筑节能在我国能源可持续发展中的意义和作用，针对影响能耗的相关因素，提出了提高围护结构保温性能的措施。