稻谷储存期对米粉制品品质特性影响机理研究

本文研究了储存期为0-18个月稻谷的DSC热特性、米淀粉晶体相对结晶度,米粉制品质构特性的变化,以及它们之间的相关性。研究结果表明稻谷的储存期增加可以改善米粉制品质构,表现在最大破断应力、剪切应力、最大破断应变和破断功增加,拉伸特性和抗剪切性能都更好。相关性研究结果表明：DSC起始温度、峰值温度、曲线峰面积、热焓值与破断功显著相关（P<0.05）。而峰高度与破断功呈极显著正相关（P<0.01）。米淀粉亚微晶相相对结晶度、晶相相对结晶度与最大破断应力极显著负相关（P<0.01）;与剪切应力、破断功显著负相关（P<0.05）。     

LED照明节能技术的研究与设计

随着全球能源的日益短缺,能源是人类的宝贵资源已被广泛认识,人类为了节约能源,利用现代科学技术不断开发各种节能产品,其中LED照明产品就是根据节能理念而开发的.面对全球能源危机的今天,节约能源是我们未来面临的问题,文章特别针对LED照明节能技术加以研究,并分别设计出小功率LED和大功率LED照明灯.     

R^3中旋转曲面的两个性质

本文给出了R~3中旋转曲面的两个充分必要条件,并加以证明。曲面Σ是三维欧氏空间R~3中旋转曲面的充分必要条件是:1) 沿一族曲线的曲面法线构成共轴的正园锥曲面族,此轴亦为该曲面旋转轴。2) Σ的主曲率 K_1=K_1(u_1) K_2=K_2(u_1)即仅依赖一个曲率线参数u_1。     

红曲霉产生的生理活性物质的研究──Ⅰ．含麦角固醇红曲霉产红色素的条件因子及其培养条件

在研究红曲霉产生生理活性物质的过程中，获得麦角固醇含量较高的红曲霉菌株，从中选择两株进行产生红色素条件因子的研究，实验结果表明，甘油、大米粉、温度、ｐＨ对产生红曲色素具有较大的制约作用。     

师生谈心高效之浅见

在平时的教学工作中,师生交流与沟通只要能重视方式方法,就能增进师生间相互理解、支持与配合,建立浓厚的师生感情,产生凝聚力、向心力,有利于良好学风的形成,促进学生身心健康发展.那么,教师应如何与学生谈心才能更高效呢.笔者对此进行了论述.     

抗氧化石墨材料的实验研究

用一种新工艺——泥浆凝胶工艺制备了石墨材料抗氧化梯度膜，通过初级泥浆涂层和合理的实验参数控制，生成了致密的ＳｉＣ涂层。通过Ｘ射线衍射对涂层进行晶相分析，用扫描电镜分析涂层的成分，证实涂层中ＳｉＣ浓度呈梯度分布，因而缓和了涂层与基体间的热应力。氧化实验表明样品在１０００℃下氧化３００ｈ、１４００℃２００ｈ以及１６００℃、２０ｈ样品质量没有任何损失。１４００℃下经２０个热循环试验后样品完好无损     

碳纳米管的本征微波吸收特性研究

从碳纳米管电磁参数和微波吸收特性的实验结果出发,分析探讨了碳纳米管的本征微波吸收机理,并得出结论:界面极化吸收、多重反射和散射以及螺旋型碳纳米管的手性微波吸收是碳纳米管的主要本征微波吸收机理.碳纳米管的结构缺陷能增强极化效应,从而增加介电损耗;碳纳米管所具有的小尺寸效应、表面效应(比表面积大)、量子尺寸效应和宏观量子隧道效应等有利于其微波吸收.碳纳米管的电容率值远大于磁导率值,碳纳米管是一种介电损耗型吸波介质.     

Blue emission from hydrogen-containing a-Si：H／SiO2 multilayers and the investigation of its mechanism

A series of hydrogen-containing a-Si:H/SiO2 multilayers with different a-Si:H sublayer thickness were fabricated by layer-by-layer deposition and in situ plasma oxidation in a plasma-enhanced chemical vapor deposition system (PECVD). Optical induced blue emission from the samples was observed by the naked eye at room temperature, which has never been reported in the luminescence study of Si/SiO2 multilayers up to now. Both the photoluminescence (PL) peak and the absorption edge show a blue shift as the a-Si:H sublayer thickness decreases. The origin of the blue emission and the effect of hydrogen are discussed.     

Re-evaluation of the phylogenetic position of the genus Dexiotrichides (Protozoa, Ciliophora, Scuticociliatida) inferred from stomatogenetic and molecular information for Dexiotrichides pangi

The divisional process and systematic position of the marine scuticociliate Dexiotrichides pangi are studied. Based on both stomatogenetic data and 18S rDNA gene sequences, the phylogeny and morphogenetic characteristics of this taxon, and of other related genera, are analyzed and discussed. Both the divisionary events and the molecular biological data indicate that this speciesgenus, together with certain other genera in the Dexiotricha-complex, occupies an intermediate position between the tetrahymenids and the “typical” scuticociliate, which suggests that the Dexiotricha-like taxa should be excluded from the “true” scuticociliates. As a further contribution, the process of stomatogenesis in D. pangi can be summarized as follows: (1) The oral primordia in the opisthe are formed only by the proliferation of basal bodies in the scutica field, which subsequently develop into three membranelles, while the new paroral membrane seems to be generated by the sub-anterior portion of somatic kinety 1 (the 1st postoral intercalary kinety). The latter character exhibits a mode similar to Tetrahymena. (2) In the proter the parental membranelles are retained and remain unchanged throughout the entire division process; only the old paroral membrane is disassembled and differentiated into the anlage, which then gives rise to the new paroral membrane and the scutica of the proter. The 18S rRNA gene sequence reported here is the first one for a ciliate in the Dexiotricha-complex.