Batch cultures of Penicillium camembertii on glucose and amino acids—model for growth and ammonium production

BACKGROUND: Three groups of amino acids were previously characterized based on their ability to be assimilated as carbon source by Penicillium camembertii. To describe the diauxic growth recorded on glucose and amino acids from the second group, such as arginine, an unstructured model was previously developed, based on the sequential consumption of both carbon substrates, glucose, followed after its exhaustion, by arginine. The model was modified to describe also the behaviour recorded during growth on other amino acids. RESULTS: The growth model involved the carbon substrate consumption (Verlhust model) and the biomass on carbon substrate yield. Glucose was therefore considered during P. camembertii growth on nitrogen source amino acids (lysine—first group); and amino acid consumption was considered during growth on carbon source amino acids (glutamate—third group), with glucose being dissimilated only for energy supply. The excess nitrogen from amino acids was released as ammonium; the linking of this production to growth was found to increase with the ability of the amino acid to be assimilated as carbon source by P. camembertii. CONCLUSION: The various metabolic behaviours recorded during P. camembertii growth on amino acids, in the presence of a primary carbon source such as glucose, were proved to be satisfactorily described by the model, showing the robustness of the model. Copyright © 2007 Society of Chemical Industry     

软启动装置

低压鼠笼型交流感应电动机在冶金系统应用极其广泛，对其传统的启制动方式的不足之处加以讨论，引出新型启动和停止装置－软启动器，该装置极大地减轻对电网和设备的冲击，还可作节能运行，对低减转矩类负载尚可开发调速性能。     

基于Profinet的电机启动器在物流系统中的应用

针对物流系统现场设备的特点,介绍基于Profinet的电机启动器的设计与应用.     

软启动器在煤矿大采高工作面中的应用研究

介绍了神华乌海能源有限责任公司大采高工作面的供电方案及设备配套,研究了软启动器在刮板输送机中应用的可行性,重点分析了使用软启动器之后采区负载启动时对移动变电站的电气冲击情况。使用Matlab/Simulink软件建立采区供电系统模型,对软启动器的启动性能进行仿真分析,在轻载时使用限流启动方式,在重载时使用变频启动方式,结果表明软启动器能有效降低设备启动时的电气冲击。     

选煤厂取料机料耙液压泵站控制系统设计

针对目前选煤厂取料机料耙液压泵站电动机大多采用直接启动方式,液压油的温度检测采用模拟仪表实现,存在着对设备冲击大、油温检测精度不高、可靠性差等问题,提出了基于软启动器和PLC的新型液压泵站控制系统设计方案。该系统通过PLC采集液压泵站油温及设备运行状态,根据设定的工作模式对其进行控制,并可实时在线显示液压泵站运行状态、故障诊断报警信息,具有油温超限、滤油器堵塞、电动机过流等多种保护功能。     

A cross-cultural, multidisciplinary proof of the newly discovered developmental linguistic law of concordance of speech and motor development in children.

Humorously describes fictional studies "proving" that motor and language development occur concurrently ("hand in hand") and that this development is independent of culture. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

略论中希神话的差异

神话对中国和希腊两国文学皆产生了巨大影响。但由于中希两国地域、自然条件、文化传统及民族个性等各方面的不同,使得两国的古代神话呈现出不同的艺术风貌。希腊神话体现的是个性、力量和人性,中国的神话则崇尚共性、德行和神性。本文将从这三方面简要探讨中国神话和希腊神话之间的差异,以便更深刻地了解中希两国文化。     

民族地区英语教育中民族文化角色思考

随着英语教育在中国的普及,其负载的英语文化弱化了少数民族外语教育中的民族文化角色,使得跨文化对话严重失衡。从教师、教材及课程设置等方面来探索并诠释民族文化角色,对民族地区外语教育如何真正实现跨文化对话、构建和谐文化生态提出了建议。     

基于开关磁阻电机的车用起动-发电-助力一体化系统研究

针对基于开关磁阻电机的车用起动-发电-助力一体化（ISAD）系统，分析其主要工况（起动，助力，发电）状态下控制策略并给出仿真波形。同时采用TMS320F240型数字信号处理器和EPM7128S型复杂可编程逻辑门阵列构成核心控制器。最后以1kW三相6／4开关磁阻电机为样机完成起动-助力-发电实验，给出了实验波形和分析结论。实验结果表明，该控制器及其控制策略是有效的，基于开关磁阻电机的车用ISAD系统在工程实践上是可行的。     

习语学习切勿“望文生义”

习语是英语词汇学习的一个组成部分,对英美文化有传承、记载、反映的作用,它是英、美人进行思想表达和信息传递习惯使用的重要语言形式。习语学习既要了解英语习语的特征,又要了解“文化信息”的差异导致对语义理解的不同等等。