醇洗豆粕对大豆分离蛋白功能性质的影响(Ⅱ)--乳化性能

主要探讨了醇洗豆粕对大豆分离蛋白乳化性能的影响。与未经处理的大豆分离蛋白相比，豆粕经乙醇处理后，其乳化能力的改变并不十分明显。但就乳化稳定性而言，醇处理样品的乳化液一经形成，其稳定性是很高的，外界因素对其影响很小。通过正交试验优化，生产乳化型大豆分离蛋白的最佳工艺条件为：乙醇浓度85％(V／V)、浸提温度30℃、浸提时间30min，固液比1：4。所得产品的蛋白含量(干基)为95．66％，蛋白质分散指数为93．08％，乳化能力为70．62％，乳化稳定性为70．05％。     

大规模网络仿真特性分析及仿真技术适用性研究

随着智能化的普及,网络情况越来越复杂,大规模网络仿真成为了一个研究重点。网络仿真中,基于高性能计算平台的网络仿真技术在特征分析、仿真优化等多个阶段都涌现出制约性能提高的大量问题。为此,本文研究了基于高性能计算平台的大规模网络仿真技术,研究重点涵盖以下三个方面。首先研究了大规模网络仿真的概念和内涵;其次深入分析了大规模网络仿真的特征,以及各特征对高性能计算平台的性能需求;最后从不同角度,研究了多种仿真技术对实现大规模网络仿真的适用性。研究成果能够有效指导大规模网络仿真的高效实现。     

烟草害虫生物防治技术的研究与应用进展

从保护利用本地天敌、输引外地天敌、天敌的人工大量繁殖散放、害虫病原微生物与生物农药的利用、昆虫信息素与不育性的利用、植物抗虫性及基因工程技术的应用6个方面论述了烟草害虫生物防治的研究及应用进展,并介绍了生物防治技术在烟草害虫防治中的综合应用概况.     

Aliphatic Amidediol and Glycerol as a Mixed Plasticizer for the Preparation of Thermoplastic Starch

The synthesis of 2‐hydroxy‐N‐[2‐(2‐hydroxy‐propionylamino)‐ethyl]propionamide (“aliphatic amidediol”) is described. Aliphatic amidediol and glycerol were used as a novel mixed plasticizer for corn starch to prepare thermoplastic starch. Fourier transform infrared (FT‐IR) spectroscopy proved that the mixture of aliphatic amidediol and glycerol could form more stable and strong hydrogen bonds with starch molecules than glycerol alone. By scanning electron microscopy (SEM) and X‐ray diffraction (XRD) it was proven that native starch granules and crystalline structures were broken and starch was plasticized. Tensile testing revealed that TPS plasticized by aliphatic amidediol and glycerol (AGPTPS) showed a better mechanical properties than TPS plasticized by glycerol (GPTPS). Furthermore, the water resistance of AGPTPS was better than that of GPTPS. In addition, dynamic mechanical thermal analysis (DMTA) showed that both storage modulus and glass transition temperature (T_g) of AGPTPS were higher than those of GPTPS.     

S3P9234单片机在空调显示板系统中的应用

讨论了S3P9234在空调显示板中的应用.首先剖析了S3P9234芯片的内部结构,然后给出了以S3P9234微控制器为核心的空调显示板系统的软硬件设计.     

智能电能表数据安全隐患多层次分析与系统设计

电能计量装置是智能电网的核心部分,对用户和电力企业提供多种先进功能,但多数电能计量装置缺乏安全性保护。针对此问题,提出了一种安全漏洞多层次分析与系统设计方案。该系统考虑了大量用电日志,以便向用户提供详细信息,允许其有效识别出用电高峰时段。使用安全文件传输协议(FTP)将用电数据从智能电能表传递至电力企业服务器,以确保数据传输的隐私性和安全性。系统中还使用了加密技术,通过传输层安全(TLS)/安全套接字层(SSL)来保护用户与Web门户之间的通信。通过对系统强化等分析表明,与同类系统相比,所提系统设计具有较大的安全性优势。     

一种短小芽孢杆菌分离鉴定及培养条件研究

为实施城市垃圾渗透液的生物无害化处理,分离、筛选、鉴定,获得特定菌株,并对其最适培养条件和最佳培养基组分进行优化。从城市垃圾填埋场垃圾渗透液中分离芽孢杆菌,通过设计特异性引物进行PCR反应鉴定目的菌株。此菌细胞呈现杆状,革兰氏阳性,经鉴定为短小芽孢杆菌。采用单因素实验和正交实验法对菌株生长适宜的培养基进行了优化。优化后的培养基主要成分为：玉米淀粉0.1%,酵母提取物1.0%,小牛浸膏0.3%,NaCl0.5%,MgSO4·7H2O 0.49%。在这种条件下,菌株培养10h,其OD320由1.44上升到6.93,为该菌株的深入研究和应用奠定了基础。     

EBA改性对聚碳酸酯增韧性能的影响

采用乙烯-丙烯酸丁酯共聚物（EBA）对高抗冲聚碳酸酯（PC）进行增韧改性。分别使用缺口冲击试验机、万能试验机、熔融指数仪和FESEM对PC和EBA增韧的PC的力学性能,流动性和结构形态进行表征。结果表明：随着EBA含量的增加,材料的韧性逐渐增强,10％的EBA增韧PC时,增韧效果较好,冲击强度达81kJ／m2,但共混材料的熔融指数降低到11．5g／10min。因此,在注射成型过程中应适当提高注射成型温度和压力;当EBA用量超过10％时,增韧PC的拉伸强度、弯曲强度有明显下降。     

Formation of formic acid from glycerine using a hydrothermal reaction

BACKGROUND: Glycerine, a main by‐product of the biodiesel manufacturing process, has potential to be an important biorefinery feedstock with the rapid increase in biodiesel production all over the world. Hydrothermal experiments with glycerine were carried out at 250 °C using H₂O₂ as an oxidant. RESULTS: Glycerine was converted into formic acid with a yield of 31.0% based on the starting mass of carbon in glycerine. A possible oxidation pathway for the formation of formic acid from glycerine is proposed. In the proposed pathway, glycerine may first be oxidised and then decomposed into formic acid and oxalic acid. Oxalic acid was indirectly attributed to the increase of formic acid production from glycerine, but it instead acts as a retardant to prevent further oxidation of formic acid. However, when an alkali was added to the experimental conditions, the yield of formic acid was not greatly improved, reaching only 34.7%. CONCLUSION: The present work should help to facilitate further studies to develop a new green process for the production of formic acid from renewable biomass. © 2012 Society of Chemical Industry     

水热合成制备超细氢氧化镁阻燃剂

采用低温水热、高温水热、氢氧化钠环境水热、引入晶种水热等不同水热工艺制备出超细氢氧化镁粉体。分别对制备出的粉体进行了XRD、TEM、BET等表征,并将所得粉体添加到软质PVC中,进行了阻燃及力学性能测试。结果表明,在上述水热方法中,氢氧化钠环境水热与引入晶种水热法制得的氢氧化镁超细粉体比表面积低、极性小、分散性好,改性后添加于软质PVC中得到良好的应用效果,且引入晶种水热法易于工业化生产。