压力筛筛浆理论与新技术的发展

本文探讨国内外制造厂家对压力筛的转子、筛鼓与浆流分配等新技术的发展所依据的各种筛浆理论,并讨论了今后的产品改进方向。     

压力筛筛浆理论与新技术的发展

探讨国内外制造厂家对压力筛的转子、筛鼓与浆流分配等新技术的发展所依据的各种筛浆理论 ,并讨论了今后的产品改进方向     

压力筛筛浆理论与新技术的发展

探讨国内外制造厂家对压力筛的转子、筛鼓与浆流分配等新技术的发展所依据的各种筛浆理论,并讨论了今后的产品改进方向.     

进口压力筛破损筛鼓的修复

本文介绍了进口压力筛筛鼓损坏后的修复方法。     

减少高档薄纸中浆疙瘩的经验

本文介绍在薄纸生产中出现的浆疙瘩产生的原因和解决途径。     

压力筛浆机及其筛板的新发展

近十年来压力筛桨机及其筛板有了飞速的发展，波形筛板和齿形筛板的应用为提高压力筛筛浆能力和筛浆洁净效率起到了关键性的作用。本文综述了近年来压力筛浆机及其筛板的新发展，并例举了压力筛应用实例。     

棒条式压力筛筛鼓制造过程的质量控制

筛鼓是压力筛的重要部件,筛鼓质量的好坏直接影响筛选效率、筛选质量及筛鼓本身的寿命。本文从棒条式压力筛筛鼓制造过程的质量控制角度进行阐述,包括压力筛筛鼓的结构组成、筛鼓零部件加工过程的质量控制、筛鼓组装焊接及整体加工过程的质量控制以及筛鼓成品的质量检测等。     

压力式筛浆机筛鼓的结构改进

压力式筛浆机简称压力筛，是目前一种先进的筛选设备。通过对国内大部分造纸企业的考察、调研分析得知，筛鼓是典型的易损件，现在国产筛鼓的使用寿命平均在2～3个月。比如1．2m^2压力筛筛鼓，现在国产价格为1．3万元左右，这样一台压力筛一年需用4～6个筛鼓，价值为5．2万～7．8万元左右，一条100t／d废纸生产线大约需要5台压力筛，这样一年需要26万～39万元的筛鼓配件。为此，我们对筛鼓进行了专门研究，设计出一种新型筛鼓。     

紧凑的筛浆系统

瑞典Mrrums Bruk纸浆厂在氧脱木素阶段前安装了一套紧凑的筛浆系统。为了提高中浓氧脱木素系统效率要用筛过的浆;设计可使设备停车时间减低到最低限度。Mrums Bruk是一家生产漂白商品浆的工厂,位于瑞典南部的东海岸。该厂属于Sdra Skogsgarna公司。在两条独立的生产线上每天生产600吨阔叶木浆(主要是桦木)和400吨针叶木浆。每条生产线上有5台间歇式蒸煮锅。因为全部产品都是在开放市     

Polyols and chocolate technology: recent developments and advances

Reducing the sugar level in chocolate and developing low-calorie products are important for meeting consumer expectations, supporting public health and adapting to current consumption trends. However, the identification of bulking agents to be used for this aim is a critical factor. The most commonly used sugar alternatives for this aim are polyols. In this study, recent advances and developments for using possibilities of polyols in chocolate technology were discussed and future perspectives were highlighted. Partially and/or complete replacing of sugar with polyols can provide a low-calorie product. In addition, the use of mixtures consisting of more than one polyol is an approach that can be used in chocolate sugar substitution. Optimization of refining, conching and tempering processes by considering polyol type and content may contribute to the development of chocolate with improved quality properties and shelf life. However, polyol and bioactive compounds interactions and possible effects on bioaccesibility, bioavalibility and stability of these compounds in chocolate composition and pre- and post-digestion periods should be deeply investigated. In addition, the conching methods and conditions used is another factor to be considered in the use of polyols.     

水产品安全现状与预警技术

对目前国内外水产品安全现状作了简要介绍,并对我国水产品安全存在的问题进行了深入分析。水产品安全预警是一种保证水产品安全的新技术。预测食品微生物学是应用于水产品安全预警的有效方法,是提高水产品安全的重要手段,是一门新兴学科,是一种防止病原微生物对食品污染的有效的预警工具,未来将有很大的发展空间与潜力。      

纳米纤维生产技术的发展现状

作为生产超细纤维的方法,静电纺丝已成为主要的技术,并已可以工业规模生产。但静电纺丝的一些缺陷,如使用的溶剂通常具有毒性,生产效率非常低,促使人们寻求一些替代方法,最近几年这些方法已商业化。     

Interrelationships between recent developments in molecular genetics and cytogenetics and animal breeding

Animal breeding traditionally has entailed devising means to apply quantitative and population genetic theory to increase productive capacity of livestock. A highly developed and successful industry has been built on foundations established by academic animal breeders. Recent developments in related sciences such as reproductive biology, molecular biology, cellular biology, and cytogenetics offer prospects for the emergence of a number of methodologies that might usefully be applied to animal breeding. Scientists engaged in development of the newer technologies are not wholly familiar with the livestock industry, its breeding structure, its objectives, its institutions or its peculiarities. Animal breeders, however, are not fully cognizant of the scientific advances being made in related fields, their potential for development and application or their limitations, and therefore, animal breeders have not seriously thought about how they might be integrated most usefully and efficaciously into the animal breeding enterprise. A collaboration is needed in which the laboratory scientists produce new ideas, products, and methods and the animal breeders--using system analysis, simulation procedures, and laboratory animal and livestock breeding tests--help make rational choices, partially direct work of the laboratory scientists, help the industry integrate new methods, and monitor the extent of success of adapted innovations.     

大提花纱罗织造技术的新进展

描述了大提花纱罗织造技术的新进展和更广阔的应用.在一个新的研究项目中,有效的纱罗综丝已研发出来,并经过了工业化测试.展示了织造过程中纱罗纱线和固纱的补偿解决方案.     

填充床固态发酵生物反应器模拟研究进展

数学模型是固态发酵生物反应器设计、优化和操作的重要工具,它不仅可以指导SSF过程生物反应器的设计和操作,而且可以深入分析发酵系统内的各种现象从而控制整个发酵过程。文章分析近几年固态发酵填充床生物反应器的拟均相假设模拟模型、非均相假设模拟模型和间歇混合填充床生物反应器模拟模型,对模拟结果进行讨论,深入分析如何用数学方法描述SSF系统的传热传质模型。在分析填充床固态发酵底物床层的系统组成及其性质的基础上,提出利用多孔介质体积平均理论研究SSF系统传热传质过程的可能性。     

固态发酵生长动力学模拟的研究进展

数学模型是SSF生物反应器设计、优化和操作的重要工具,它不仅可以指导SSF过程生物反应器的设计和操作,而且可以深入分析发酵系统内的各种现象从而控制整个发酵过程。文中综述了近几年SSF过程动力学数学模型的发展,深入分析如何用数学方法描述SSF系统的各种动力学现象,对模拟结果进行讨论,并指出了该模型需要进一步改进的问题。