A retrospective survey on the effect of Kaschin-Beck disease prophylaxis by a change of water sources

In order to provide further references for studing on the causes of Kaschin-Beck discase (KBD) and measuring for its prevention and treatment from a macroscopic view, we analyzed the natural growth and declineof KBD and the effects of selenium and humic acid on its occurrence from an epidemiologic angle. In this article through a retrospective survey on the spots of disease areas by comparison between a change in water sources and that without. It was proved that a change in water sources was an effective measure for the prevention of KBD occurrence, and the pathogenic factor of KBD was one (or several kinds) of organic compounds or active radicals related to water.     

Windows95下的锻造CAD系统开发

从系统原理、数据管理、图形处理等几方面探讨了Windows95下的锻造CAD系统开发,并简单介绍了该系统的主要功能和特色。     

催化裂化含酚废水的预处理研究

本文研究了用焦化柴油为萃取剂，采用萃取法对催化裂化含酚废水进行脱酚预处理的可能性。并研究了混合强度、ｐＨ值等对萃取效率的影响，测定了油水两相中酚浓度的平衡曲线．研究结果表明，采用焦化柴油对这一含酚废水进行处理是可行的。     

CuAPO-5分子筛催化氧化水溶液中苯酚的性能

以水热晶化法合成了铜磷铝分子筛CuAPO-5，并用XRD、SEM，FT—IR，UV—Vis等对样品进行了表征，结果表明Cu^2＋进入到了AlPO4-5分子筛骨架中。研究了以CuAPO-5为催化剂，H2O2为氧化剂对水溶液中苯酚的催化氧化性能。在苯酚初始浓度200mg／L、H2O2添加量1200mg／L、pH值5．0、处理温度80℃时，处理240min时苯酚去除率达到100％，TOC去除率达81．76％，析出到溶液中Cu^2＋浓度仅为0．527mg／L。温度从40℃上升到80℃时，苯酚的去除率及TOC去除率明显增大，表明温度对催化剂的活性影响显著，相比于均相催化剂骨架Cu催化过氧化氢分解需要更多的能量。重复性实验表明，催化剂性能稳定。     

Study on the water quality of the Taihu Lake using genotoxicological methods

ＳｔｕｄｙｏｎｔｈｅｗａｔｅｒｑｕａｌｉｔｙｏｆｔｈｅＴａｉｈｕＬａｋｅｕｓｉｎｇｇｅｎｏｔｏｘｉｃｏｌｏｇｉｃａｌｍｅｔｈｏｄｓＷｕＱｉｎｇｌｏｎｇ，ＣｈｅｎＫａｉｎｉｎｇＮａｎｊｉｎｇＩｎｓｔｉｔｕｔｅｏｆＧｅｏｇｒａｐｈｙａｎｄＬｉｍｎｏｌ...     

Separating method and dynamic processes of Nano-Al13

In order to investigate the characteristics of pure Nano-Al₁₃, Nano-Al₁₃ was separated and purified from a series of poly-aluminum chloride (PAC) solutions which had the same Al₁₃ percentage but different total Al concentrations, by using column chromatography, ethanol-acetone resolving and SO²⁻ ₄/Ba²⁺ displacement. The Al₁₃ species yield was characterized by Al-ferron timed complexation spectrophotometry and ²⁷Al-NMR (nuclear magnetic resonance). The coagulation efficiency of Nano-Al₁₃, PAC and AlCl₃ in synthetic water was also investigated by Jar tests. The dynamic process and aggregation state of kaolin suspensions coagulating with Nano-Al₁₃, PAC and AlCl₃ were similarly investigated using a photometric dispersion analyzer 2000 (PDA2000). The experimental results indicated that the ethanol-acetone resolving method was simple and could separate the PAC solution at different concentrations, while column chromatography could separate PAC solutions at low concentrations. The SO₄ ²⁻/Ba²⁺ displacement method could separate PAC solutions at high concentrations. However, extra inorganic cation and anion could be added in the solution during separation. The coagulation efficiency and dynamic experimental results showed that Nano-Al₁₃ with high positive-charged species was effective in removing turbidity and color. The dynamic process results showed that Nano-Al₁₃ also had the best recovery capability after shearing compared with PAC and AlCl₃ because the Nano-Al₁₃ conformation is more effective in charge neutralization. Translated from Acta Scientiae Circumstantiae, 2005, 25(6): 767–772 [译自: 环境科学学报]     

Deformity frequencies of benthic marine diatoms associated with contaminated sediments in Hong Kong

ＤｅｆｏｒｍｉｔｙｆｒｅｑｕｅｎｃｉｅｓｏｆｂｅｎｔｈｉｃｍａｒｉｎｅｄｉａｔｏｍｓａｓｏｃｉａｔｅｄｗｉｔｈｃｏｎｔａｍｉｎａｔｅｄｓｅｄｉｍｅｎｔｓｉｎＨｏｎｇＫｏｎｇＭｉｃｋＤｉｃｋｍａｎＥｃｏｌｏｇｙａｎｄＢｉｏｄｉｖｅｒｓｉｔｙＤｅｐａｒｔ...     

镍、锌、铝对羊角月芽藻(Selenastrum capricornutum)生长及酶活性影响研究

研究了不同浓度镍、锌、铝对常见绿藻羊角月芽藻（Ｓ．ｃａｐｒｉｃｏｒｎｕｔｕｍ）生长速度、蛋白质含量、ＡＴＰ水平、葡萄糖－６－磷酸脱氢酶（Ｇ６ＰＤＨ）、酸性磷酸酶及硝酸还原酶活性的影响．结果表明３种金属离子在所试浓度范围内对羊角月芽藻的生长速度均有抑制作用，但单位藻培养物中蛋白质含量却随着金属离子浓度的增加而增加；高浓度金属离子对酶活性有明显抑制作用；藻细胞中ＡＴＰ水平随着金属离子浓度的增加而下降．提出金属离子对藻类生物产生影响的机理可能是：高浓度金属离子的存在，打破了生物最佳的各种营养元素生物可利用性的平衡．并讨论了藻类生长及生化活性对金属离子反应的相关性．     

宝山高速公路路域草本植物选择

以宝山高速公路路域为实验点，从草本植物的生物习性和公路路域的特点出发筛选适于该地区及周边地区公路路域的草本植物，方法包括野生植物的调查筛选，外来物种的引进和筛选，经过2年的实施，筛选出若干适于宝山公路及华大部分地区公路路域的草本植物。     

气候变化对秦皇岛地区降水量影响分析

以秦皇岛市为例,研究了气候变暖对地表降水量的影响.通过对51年来秦皇岛市气候、降水材料的分析得出结论:秦皇岛市近年来明显变暖,年平均气温上升约2℃,同时气候变干,降水量减少18.3%;气候变化会引起水循环的变化及水资源在时空上的重新分布以及水资源总量的改变,对流域内的水资源量影响十分显著.