Preparations and Properties of Perfume Microcapsules

With Perfume as core and gelatin-gum arabic as mem-brane,a series of microcapsules were prepared by meansof complex coacervation at various technical conditions.Their interior and outer diameters and membrane thick-nesses were measured and the effects of preparation tech-niques on microcapsule properties were revealed.     

制备工艺对农林用高吸水材料凝胶强度的影响

以工业废胶为原料，通过研究交联反应时交联剂的体积分数、温度、时间及水解反应时碱溶液的质量分数、温度、时间等工艺条件制备出交联的聚丙烯酸盐类高吸水材料，通过测定高吸水材料吸水后凝胶在一定应力下的形变大小，作形变-时间曲线比较不同制备工艺条件下所得高吸水材料的弹性模量大小，从而相对表征高吸水材料的凝胶强度大小。     

深化改革,提高农业院校机械基础实验室管理水平

本文分析了农业院校机械基础实验室的地位和作用,阐述了目前机械基础实验室建设和管理中存在的问题,提出了通过加大资金投入、积极进行实验室改革、提高实验技术人员素质和开放实验室等举措来提高实验室整体水平的对策与措施。     

Transcriptome analysis of Sinorhizobium meliloti nodule bacteria in nifA mutant background

Sinorhizobium meliloti is one genus of gram-nega- tive soil bacteria that can fix atmospheric nitrogen in root nodules of its symbiotic leguminous host plants[1]. Specific recognition and progressive differentiation ofboth bacteria and host cells are requ…     

Collapse and revival in Aharonov-Bohm electron interference experiment

It is shown that in the presence of even and odd coherent state field the collapse and revival (CR) phenomenon can occur in Aharonov-Bohm electron interference, which is closely related to the quantum fluctuation of the field. CR phenomenon reflects the effects of quantum noise of the field on the dynamic behaviour of electron interference. For coherent state field and number state field there is no CR to occur, which means that CR is due to both wave and particle aspects of the field.     

傅立叶变换的计算机可视化表达

介绍了一种可视化的离散傅里叶变换教学课件，该课件以文字说明和图形的方式，对ＤＦＴ性质进行演示和说明，可用于课堂教学和实验教学     

高等职业教育中的人文教育

高职院校应充分重视学生技术、技能的培养和训练,为学生就业打下基础,但高职院校并不是单纯的职业培训场所,学校在实施技术教育的同时不能忽视“人文”的内涵,必须树立培养学生做人做事相结合的教育观念,让高职学生成长为时代所需要的全面发展的人。     

A study of quasicrystal structure factors by using quantitative CBED

The procedure of simulating convergent beam electron diffraction (CBED) pattern of quasicrystals by dynamical theory is described. The simulated patterns are generally coincide with the experimental patterns. The variations of intensity distribution in CBED pattern with the amplitude and phase of the structure factor of quasicrystal are calculated with dynamical theory. The sensitivity of intensity distribution to the structure factor is investigated. Foundation item: Supported by the National Natural Science Foundation of China (59871034) Biography: Zhao Chun (1974-), female, Master candidate. Research direction: diffraction physics.     

富勒烯-聚甲基丙烯酸甲酯复合膜溶胶-凝胶制备与结构的研究

采用溶胶-凝胶的方法，在Si（100）衬底上制备了C60-聚甲基丙烯酸甲酯（PMMA ）复合膜.红外光谱分析表明，C60分子已均匀地分布在PMMA中，凝胶以后形成了C 60-PM MA复合膜.利用X射线衍射（XRD）谱研究了该复合膜的结构，结果表明，在200℃真空退火后 C60分子 趋向相互聚集并形成晶化C60颗粒，其尺寸强烈依赖于C60含量.随C60含 量的增加，晶化C6 0颗粒尺寸增大.高C60含量的复合膜中多晶状态的C60 颗粒，呈现面心 立方（fcc）结构〈111〉方向的择优排列特征；并且观察到XRD信号极强的、异常的333衍射 峰现象，对其产生机理进行了初步探讨.     

第二个滥木厂式铊矿床何在?——杨家湾铊矿点的发现及其找矿远景初析

杨家湾原为一汞矿点，在前人工作基础上通过对杨家湾北东向含矿断裂带中部在夜郎组第一段（Ｔｌｙ１）和第二段（Ｔｌｙ２）中系统进行地球化学剖面取样，分析结果表明，仅１件样品Ｔ１含量低于１００×１０－６（ＹＪ１５ＴＩ含量为５６×１０－６）外，其余１４件（ＹＪ１～ＹＪ１４）Ｔｌ含量均大于１００×１０－６，变化于３８６～９６０×１０－６之间，平均为６５３×１０－６（０．０６５３％），达到铊矿石工业品位要求，与滥木厂铊（汞）矿床对比，在赋矿地层、控矿构造、围岩蚀变和矿化特征等方面均极相似，成矿条件有利，找矿远景良好，如进一步工作，有可能找到第二个滥木厂式铊矿床。