固态发酵在食品工业中的应用

近来,随着反应器设计的发展,固态发酵(SSF)已经取代液态发酵(ScF)成为食品工业应用中的研究热点.本文论述了SSF在与食品加工工业有关的一些代谢物的生产中的应用,主要包括香料、酶(α-淀粉酶、果糖基转移酶、脂肪酶、果胶酶)、有机酸(乳酸、柠檬酸)和黄原胶.     

无线交通信号控制系统及新技术的应用

介绍了一种无线交通信号控制系统,该系统是先进的短程无线通信(Zigbee)技术和光耦-固态开关控制技术的有机结合,其性价比高,特别适合应用于没有通信网络的路口、道路和桥梁的交通信号控制.该系统所采用的无线控制技术还可应用于其它方面,如车辆违章图像信息的抓拍和传输.     

关于对固体饮料质量安全标准的思考

在固体饮料朝着多元化、个性化、差异化、独特性方向发展的今天,固体饮料质量安全标准的研究应与时代相结合,与技术进步和科技创新相结合,研究修订固体饮料理化指标的考核标准和不同固体饮料个性特征的评定标准,加强固体饮料卫生、安全性研究,尽快制定和实施婴幼儿固体饮料的生产、检测国家标准,全面提升固体饮料的质量安全性。     

焦化废水中亚硝酸盐和固体悬浮物对CODcr值的影响研究

研究了亚硝酸盐与固体悬浮物对CODcr值的贡献及影响,通过实验找出了在焦化废水中二者与CODcr值的关系,对焦化废水的处理有一定指导意义。     

产糖区利用生物质制备乙酰丙酸的研究进展

在蔗糖业中开展生物炼制,利用生物质开发绿色平台小分子(如乙酰丙酸),是解决能源危机的重要途径,也符合蔗糖业规避风险和提高市场应变能力的要求.文章分析了蔗糖制备乙酰丙酸的原理和催化剂选择,并以几种固体无机酸催化为例说明,制备中可采用超声-微波协同技术提高生产效率,高效液相色谱法在分离提纯产品中能发挥较好作用.     

南京市固体废弃物循环利用规划研究

本文以南京市固体废弃物循环利用规划为例,把建设循环型社会系统作为目标,从现状分析入手,确立了南京市固体废弃物循环利用规划的阶段目标,提出了固体废弃物循环利用的重点任务和对策,并给出了规划实施的重点工程。     

税法基本原则的基本问题研究

税法基本原则的确定、结构和功能,是税法基本原则的基本问题,而这正是我国的税法理论研究没有从逻辑上回答的问题.税法基本原则的确定,应依据税法的价值和调整对象,而不能以因证果;税法的基本原则只能是税收法定原则、税收公平原则和税收效率原则,这三项性质各异、相互冲突的基本原则实际作为三个数轴,构成了一个具有稳定结构的整体:税法的立体坐标系.这一坐标系在税法的整体运行中具有统摄、评价和限制等重要的功能.     

A flexible inventory model for municipal solid waste recycling

State laws mandate the recycling of municipal solid waste (MSW) across most of the United States. In order to comply, municipalities recycle quotas of materials, generally without regard to fluctuating prices. An inventory system is proposed that allows municipalities to be sensitive to materials prices as they recycle in accordance with state mandates. A dynamic model is developed that uses historical secondary material prices as exogenous inputs to minimize the net present value of MSW recycling system cost. The model provides a cost effective method for municipalities to achieve their MSW recycling targets. The savings is approximately $1.28 per ton of MSW generated as based on total MSW management costs of $13.5 per ton. The model also allows one to investigate the effectiveness of various strategies for increasing the recycling rate, including reducing the transportation cost for recyclables, supporting the market price of selected secondary materials, and landfill bans on selected materials. Our proposed model may also be used to investigate the effect of market price changes on the portfolio of materials held in inventory for recycling.     

我国城市垃圾现状与可持续发展研究

首先分析我国城市垃圾问题的现状,介绍了我国目前城市垃圾处理技术,并对城市可持续发展垃圾治理问题进行了探讨。     

Provision of Residential Solid Waste Management Service in Rural China

Drawing on a dataset covering a large number of randomly sampled villages across China, the present paper examines the issue of residential solid waste management service provision in rural China, Using a logistic model we evaluate the impacts of different factors on service provision at the village level with regard to residential solid waste disposal. These factors include the environmental pressures caused by residential solid waste generation, the financial capacity of the Villagers＇ Committee, village elections and the individual characteristics of village heads. We find that living density, village per capita income, the ratio of irrigated land, and the per capita profit submitted by village enterprises to the Villagers＇ Committee all have positive impacts on service provision. Moreover, village heads who are popularly elected by villagers are more likely to provide services that satisfy voters＇ demands.