黄金周对休闲产业的贡献与冲击

我国自1999年开始实施旅游黄金周政策以来,出现了前所未有的假日旅游热,与旅游相关的休闲产业也得到了迅速的发展．扩大了内需,刺激了经济的增长．初步形成了以旅游为主导的假日经济,成为我国社会经济文化的一个新现象,也使人民开始了各种新颖的休闲方式．然而在推动休闲产业迅速发展的同时也暴露出许多问题引起了各方的关注．当前,我国的休假制度做出了重大改革,取消了“五一”黄金周,继而出现了一系列的黄金短假期．该文主要分析了黄金周对休闲产业的贡献与冲击,提出了我国发展休闲产业可采取的一些对策。参5．     

制糖生产零取水零排放的技术方案

针对制糖生产用水存在的问题,提出了制糖生产零取水零排放的技术方案及工艺组成。其核心技术经试验和工程实践证明是合理、有效的,具有技术先进性和推广性。     

构建“水-煤-碳”体系 优化煤化工发展

分析了煤化工行业发展的现状及趋势,提出我国现代煤化工发展瓶颈主要是产业发展存在技术风险、产业发展与资源环境的矛盾突出及面临碳减排压力,并提出通过合理构建"水-煤-碳"三大约束指标体系,引导煤化工实现有序发展。     

Combustion characteristics of asphalt and sodium compounds

Risk evaluation of mixtures of asphalt and inorganic salts such as sodium nitrate, sodium nitrite, sodium carbonate and sodium dihydrogenphosphate was conducted. The ignition and the combustion characteristics of mixtures of asphalt and oxidizing salts were obtained. Quasi-heat-accumulation experiments of asphalt–salt mixtures were conducted using about 1 kg samples. Six types of asphalt–salt mixtures were made and their ignition characteristics were examined in the quasi-heat-accumulation experiments. Then to clarify burning behavior of the asphalt–salt mixtures, experiments for understanding their combustion characteristics were conducted using a cone calorimeter.

The main results are as follows.

(1) In the quasi-heat-accumulation experiment, a region with high concentration of the salt mixture particles was made at the bottom of the sample vessel through the process of their sedimentation. An exothermic reaction started in this region. Just before the asphalt–salt mixture was ignited, a huge amount of white smoke was released. A kind of jet flame of a few meters in height was created.

(2) Based on the data of ignition temperature from the cone calorimeter experiments, ignition of asphalt was caused by a chemical reaction of asphalt with an oxidizing salt. The combustion of the asphalt–salt mixture contained the self-heating reaction.     

信息产业部电子第三十九研究所工业卫生状况分析与控制

着重阐述了信息产业部电子第三十九研究所的工业卫生状况 ,对超标作业点提出了控制及防范措施     

发展地方环保产业的思考

本文论述了发展地方环保产业的六大要素：优势、科技、龙头、基地、环境、创新。抓住了这六大要素,地方环保产业就可成为地方经济新的增长点。     

异喹啉季铵盐在盐酸中对A3钢的吸附及其缓蚀作用

采用失重、电化学法研究了异喹啉季铵盐在 1mol/L盐酸溶液中对A3钢的缓蚀行为及吸附规律。实验表明 ,异喹啉季铵盐是一种阴、阳极混合型缓蚀剂 ,其缓蚀性能优良 ,在A3钢表面产生化学吸附 ,吸附过程为放热反应。     

国内外环境友好有机化工技术进展

介绍了国内外环境友好有机化工技术进展－－原子经济反应、环境保护催化剂、超临界流体技术、以无毒无害及可再生资源为原料的新工艺,指出环境友好化学的发展不仅将对环境保护而且对我国化学工业的可持续发展产生重大影响。     

Does Soil Acidification Affect Spruce Needle Chemical Composition and Tree Growth?

In 1994, a large survey of soil chemistry was undertaken in thecounty of Värmland in central Sweden (Lundström et al., 1998).The southern part of the county was affected by soilacidification whereas there were no such indications in thenorthern part. To investigate the influence of soil chemistryon the trees at the specific sites, the survey was continued byan analysis of needle chemistry (Norway spruce) which wasundertaken at 150 of the 180 sites, and of tree growth at 65 ofthe 180 sites. Growth was expressed as a ratio between expectedgrowth, estimated with a national, empirical growth model, andthe growth observed in the field. In statistical analyses,using rank correlation, PCA and PLS, there were only weakindications of an influence of soil chemistry on needlechemistry and on tree growth. A moderate correlation betweennitrogen and sulphur in needles was found, which wasinterpreted as an effect of deposition and of processes in thetree canopy. No obvious regional pattern of the growth ratiowas found, in contrast to the clear pattern of soilacidification. The statistical analysis could not with anycertainty point out any of the soil chemistry variables asespecially important for the tree growth ratio.     

CHEMIFOG_V – A Model to Simulate Radiation Fogs and their Interaction with Vegetation and Chemistry

Radiation fog is an important modifier of atmosphericcompounds in the planetary boundary layer. In vegetated areas effects are especially pronounced due to the enlarged surface area. Besides affectingthe lower boundary of atmospheric models fog acts as amulti-phase reaction chamber leading to acid deposition. Here we present the 1-dimensional radiation fog modelCHEMIFOG_V to simulate regional radiation fogevents. The key feature of the fog model is thedetailed microphysics, where the aerosol/dropletspectrum is describedwith a joint 2-dimensional distribution, but also thedynamics, thermodynamics, and radiative transfer are calculated. Toinvestigate the interaction between fog and the biosphere amulti-layer vegetation module, including a soil module as well as a drydeposition module were coupled. Vegetation influences thedynamics, thermodynamics, and the radiation field of the lowestatmospheric layers. With CHEMIFOG_V, numerical case studieson dry and moist deposition processes on vegetation surfaces wereperformed. Hereby multi-phase chemistry and the processing of aerosolswere considered. The results show that the chemical composition of thedeposited fog droplets is mainly determined by the aerosol composition. Dry deposition fluxes are dependent on the incoming radiation and the leaves' surface conditions with respect to water coverage.Due to chemical aerosol processing and deposition, the aerosol spectrumis significantly modified in the planetary boundary layer.