Characteristic of filamentous fungal diversity and dynamics associated with wheat Qu and the traditional fermentation of Chinese rice wine

Chinese rice wine, a traditional alcoholic beverage, is fermented from steamed rice with a starter culture of wheat Qu which is either inoculated spontaneously with various microorganisms in natural environment or inoculated artificially with certain microorganisms. The diversity of filamentous fungi in wheat Qu and the fermentation mashes of Chinese rice wine was studied by high‐throughput sequencing. The results indicated that filamentous fungi varied in wheat Qu and fermentation periods. Moreover, Aspergillus was the dominant filamentous fungi at genus levels. On that basis, quantitative real‐time PCR was used to quantify some dominant Aspergillus species. It was found that Aspergillus species in wheat Qu were more abundant than that in various fermentation mashes and continually decreased until the end of rice wine fermentation. Furthermore, it was found that different organic acids were produced by microorganisms at different fermentation stages might due to the changes of oxygen and nutrient content.     

水剂法制油和饲用菜籽浓缩蛋白中试

本工艺有效地脱除了菜籽中的硫葡萄糖甙、单宁、芥子碱、水苏糖、棉子糖和皂甙等抗营养因子,防止了硫葡萄糖甙降解成异硫氰酸盐、硫氰酸盐、噁唑烷硫酮和腈类毒性物质对油脂、蛋白质和环境的污染,同时还有效地防止了菜籽蛋白质热劣变。因此,制得的菜籽油含硫量低,有利于加工开发利用,生产的饲用菜籽浓缩蛋白,通过养鸡试验,不仅可以代替豆饼,蚕蛹,而且也可以完全代替鸡日粮中的进口鱼粉。     

速溶高蛋白花生晶的研制

本文根据营养学原理及水剂法花生加工工艺研制优质营养食品。利用花生、蔗糖等原料生产速溶高蛋白花生晶,这是一种优质、新型的植物蛋白饮料。本文详细地介绍了速溶高蛋白花生晶研制的理论依据,生产配方及方法。     

燃气锅炉的PLC自动控制系统

本文简单介绍了燃气锅炉PLC自动控制系统.本系统根据实际供暖中负荷多变的特点,采用先进的变频技术和模糊控制技术,改变锅炉的燃气量,使锅炉节能运行.该系统对提高燃料利用率有明显效果.     

给水管网管道摩阻校正方法研究

为了提高给水管网管道摩阻系数校正的稳定性和惟一性，提出了新的摩阻校正方法.当节点流量已知时，分析节点压力受管道摩阻变化影响的敏感度矩阵，在敏感度较大的节点上收集校正数据；对大敏感度管道单独校正、对其他管道进行分组校正，从而减少了校正变量的个数；模拟管网的多工况运行，收集足够多的校正数据；将管道摩阻系数的经验估计值引入到蚁群算法的优化计算过程中，提高优化计算的收敛速度.算例分析表明，采用上述方法校正的给水管网水力模型在实际应用中得到的节点压力值与实际节点压力值更为匹配.     

固网运营商转型直面ICT

目前国内电信运营商增长乏力,转型成了电信业自2005年初开始一直持续的热门话题,各大运营商纷纷寻找新的出路和增长点.     

嵩屿电厂引风机防止喘振保护系统的研制

综述了引风机防止喘振保护系统的功能和特点 ,为防范电厂发生同样情况提供了有价值的资料。图 1参 2     

Gramicidin A aggregation in supported gel state phosphatidylcholine bilayers

Using an atomic force microscope, supported bilayers of saturated phosphatidylcholine (in the gel state) containing various amounts of gramicidin A (gA) were imaged in aqueous solutions and at room temperature. gA clusters were directly observed for the first time under these conditions. It was found that, at a lower gA concentration, gA aggregated into domains, composed of small clusters along with a considerable amount of lipids. This basic aggregation unit, most likely a hexamer, remained the same for acyl chain lengths from 14 to 18 carbons. These small clusters were observed to form elongated aggregates (line type) but never into extended pure gA domains. When gA concentrations were increased, for bilayers with 16 carbons or less, gA aggregated into larger domains but the basic unit remained separated by lipid molecules. At about 5 mol % gA, a percolation-like transition occurred at which the line type aggregates were connected to each other. However, for bilayers with more than 16 carbons, multiple lamellar structures were formed at higher gA fractions and the top layer had a ripple-like surface morphology. The molecular mechanism for the formation of these peculiar structures remains to be elucidated.     

新重丰中子核素^239Pa的观测

以５０ＭｅＶ／ｕ丰中子炮弹＾１８Ｏ轰击天然铀靶，通过奇异的多核子转移反应产生了＾２３９Ｐａ用放射化学分离方法从复杂的反应产物中分离出Ｐａ活性，借助于＾２３９Ｐａ及其子体＾２３９Ｕ衰变的观察，鉴别了新重丰中子核素＾２３９Ｐａ，并测定其半期为１０６±３０ｍｉｎｌ同时，还发现了能量为５２２．０，５６２．０，６３８．５，６８１．０ｋｅＶ的＾２３９Ｐａ的四条衰变γ射线。     

利用BP神经网络进行测井资料外推

针对在地震资料约束下资料外推的具体问题，修改了ＢＰ网络的能量函数，增加一项反演目标函数，使之作为一项新的能量约束，从而实现用ＢＰ网络自适应地外推测井资料，有机地将ＢＰ网络与地震反演结合起来，本文论述了其理论与算法，并给出了资料处理应用实例，对实际资料的测井速度外推结果表明，此方法处理速度快，稳定性好，可信度高，具有较好的应用前景。