酸沉降影响稻米品质的新发现

酸沉降影响了稻米质量和口感.酸雨时空分布从宏观上概括了稻米品质的地理分布.酸雨决定了酶活性相关金属离子的丰缺,继而影响淀粉合成关键酶的活性,最终影响淀粉合成质量.温度变化是表象,降雨pH值变化是条件,酶活性相关金属离子丰缺是根本,实质是酶活性相关金属离子或激活或抑制了支链淀粉合成关键酶的活性.提出了改善粮食作物质量的化控创新技术路线.     

实验性糖尿病新西兰兔主要器官组织的病理学观察

将雄性新西兰兔随机分为:基础饲料组(即对照组:n=15)和高糖高脂饲料组(即实验组:n=15,喂食10％猪油,37％白蔗糖混合53％的基础饲料).共观察12周.于12周实验结束时,全部处死动物,取动物心脏、肝脏、胰腺、肾脏,用1O％福尔马林液固定,常规石蜡包埋切片,H、E染色,光学显微镜下观察并照相.结果表明:动物心肌细胞肥大,并出现灶性坏死,淋巴细胞浸润,心肌细胞间成纤维细胞增生和毛细血管增生,胶原纤维增加;肝细胞有明显脂肪变性,细胞肿胀;肾脏表现有肾小球球囊增大,细胞增多,毛细血管壁增厚,肾小管上皮细胞胞体增大;胰腺组织表现为胰岛分布稀疏,数量减少,胰岛萎缩,胰岛细胞数量减少,成纤维细胞增生.     

Impacts on industry of Europe's emerging chemicals policy REACh

For Europe, a new regime in chemicals regulation is about to start. After the proposal of the European Commission concerning the Registration, Evaluation and Authorization of Chemicals (REACh) passed its readings in the European Parliament and some differences with the European Council of Ministers were resolved, the regulation will come into force in June 2007. This paper is focused on the question how serious the cost burdens for industry induced by REACh will be, and whether the New European Member States (NMS) which joined the European Union in May 2004 will be able to cope with the regulation. This evaluation has been done by assessing the legislative, administrative and economic framework in New Member States and by analysing real business cases in companies. The empirical showcase business impact studies are at the same time of interest for companies of EU-15 states, other European countries who may implement the regulation, and even for exporters of raw materials and chemicals outside Europe, who will also have to comply with REACh if they market in the European Community. The results give no indications that REACh adoption will bring significant drawbacks to companies in the NMS. The emerging regulation will bring challenges for individual companies, especially for small and medium-sized ones, but for the European chemical industry as a whole, there is no question that it will be able to cope with REACh burdens without losing its global competitiveness.     

Protecting people and property: the influence of land-use planners on flood hazard mitigation in New Urbanist developments

Research suggests that characteristics of local government land-use planners help determine the priority that local communities place on flood hazard mitigation. However, research has not examined the significance of land-use planners' values and role orientations for flood hazard mitigation. Multiple regression analysis is used to examine the influence that land-use planners' values and role orientations have on flood hazard mitigation in a national sample of New Urbanist development projects. Findings indicate that land-use planners' values and role orientations have significant implications for flood hazard mitigation in these projects. The paper recommends that local governments adopt a land-use planning approach to flood hazard mitigation that relies on land-use planners to help direct development away from hazardous portions of development sites.     

Arsenic forensic modeling leads to decommission of downgradient/off-site monitoring wells

Arsenic was detected at concentrations exceeding the regulatory limit of 0.010 milligrams per liter (mg/L) in an off-site bedrock monitoring well downgradient of a former electroplating facility in Merrimack, New Hampshire. The bedrock underlying the site is associated with naturally occurring high concentrations of groundwater arsenic. Geochemical modeling was used to evaluate whether the arsenic in bedrock groundwater at the off-site monitoring location was site-related or naturally occurring. The hydrogeochemical signature of the off-site bedrock well did not resemble signatures of site-impacted bedrock wells. Multiple lines of evidence support that the arsenic observed in off-site bedrock groundwater was not a result of adverse impacts from site-related groundwater contamination.     

Flood policy reversal in australia

In 1977 the Government of New South Wales introduced a flood prone lands policy which attempted to break with the past emphasis on structural works. Cornerstones of the policy were the preparation of floodplain maps, and use of the 1:100 (100 year or 1%) flood to delineate floodplains and 1:20 flood for floodway definition. The fiscal and regulatory elements of the policy were to be applied more or less uniformly within the two zones. At first there was little effective opposition to the program, but this changed when large areas of Sydney, which had not been inundated since development, were mapped. Local government concern over issues of legal liability led to decisions which in turn prompted opposition to the policy from residents' action groups and property development interests. A perceived drop in property values provided the main motivation for action by residents. This pressure for change, which intensified just before the 1984 state election, saw the policy overturned.
The new policy gives local government greater responsibility for floodplain management. State authorities have withdrawn from floodplain mapping, although technical advice will continue to be provided, and there are no longer any uniform floodplain or floodway definitions. Policy implementation is to be guided by a Manual which attempts to define flood hazard in terms of both physical and social criteria.     

可降解垃圾生物消纳机运行试验

介绍了新研制的可降解垃圾生物消纳机的原理，并对运行试验数据进行了分析，说明该机运行良好，社会和环境效益有独特优势。     

二万年来长江中下游自然环境变迁及其发展趋向探讨

20000～15000a.B.P.间气候最冷,生长喜冷的针叶林和干旱草原植被.在14780±700a.B.P.出现了最低海面(-154m);15000～13500a.B.P.,气候较暖湿,海面上升,生长阔叶混交林;13500～10500a.B.P.,气候有2次温暖和3次较冷,在暖期生长针阔叶混交林.较冷期则出现森林草原和草原.最低的温度比现在低5～7;一万多年来的冰后期,气候变化分为5个新冰期(包括小冰期)和5个新高温期(包括小气候最宜期).最高气温比现在高2～3℃,出现在5000～4000a.B.P.之间;最低温度比现在低3～5℃最高海面在6500～6300a.B.P.,高出现在海面4～5m.在温暖期中生长常绿一落叶阔叶林中亚热带针阔混交林;在较冷期间,生长落叶阔叶林,针叶林或草原草地.在人类影响或自然发展之结果,未来环境变化有可能向干暖气候和高海面演变,或向干冷气候和海面下降转变.这些变化将对长江中下游带来意外的灾难.     

小直径锥形管成形工艺研究

通过对小直径锥形管的工艺分析 ,介绍了一种成形的工艺方法和措施 ;并就成形、加工模具作了详细说明     

无锡新区生态工业链网设计探讨

生态工业园区是按照工业生态学原理，通过模拟自然生态系统，建立工业系统中“生产者-消费者-分解者”的循环途径，实现物质闭路循环和能量多级利用。文中介绍了生态工业园区的概念、分类和中国工业生态园区的建设进展。结合无锡新区生态工业园区的建设现状，提出新区的生态工业链网设计思路，通过园区成员企业之间的协同管理，以取得资源、环境与经济、社会效益的增长最大化。