酚类及羟基化合物对BaP代谢影响的研究

经叔-丁基-羟基-苯甲醚(BHA)对照、HPLC分析结果表明,天然化合物如从甜瓜蒂(Cucumis melo L. cucurbitaceae)提取的葫芦素B、从徐长卿根(Pycnostelma paniculatum(Bge)K.Shum)提取的牡丹酚、人工合成的对乙氧基苯酚及维生素E中间体2,3,5-三甲基氢醌对BaP在大鼠肝微粒体体外代谢均有不同程度的抑制作用。当其浓度为25μM时,对BaP9,10-二醇及9-OHBaP的生成抑制较对BaP7,8-二醇及BaP4,5-二醇的更强。     

钢筋混凝土阴极保护技术在海洋飞溅与潮差区的应用研究

对渤海某海水码头处于飞溅与潮差区的钢筋混凝土承重梁进行了阴极保护的工程实践。这项技术的工程应用进一步说明,在这种已经建成的、还在服役的钢筋混凝土构筑物内,阴极保护技术是目前抑制钢筋锈蚀的最有效和切实可行的方法。     

一种六面体有限元网格的自动生成

提出一种适合于金属体积成形有限元分析的六面体网格的自动生成方法——子区域法.这种方法首先将形状较复杂的几何实体分割成形状相对简单的六面体子区域,然后分别在每个子区域内生成六面体单元.根据这种方法的特点.提出了得到有效网格所必须考虑的问题和解决方案:子区域网格约束和子区域间网格相容性约束.     

Effect of impurities on desulfurization properties of limestone during coal gasification

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｕｌｆｕｒｃｏｍｐｏｕｎｄｓｐｒｅｓｅｎｔｉｎｃｏａｌａｒｅｕｓｕａｌｙｃｏｎｖｅｒｔｅｄｔｏｈｙｄｒｏｇｅｎｓｕｌｆｉｄｅｗｈｅｎｃｏａｌｉｓｇａｓｉｆｉｅｄ．Ｃｕｒｅｎｔｃｏｍｍｅｒｃｉａｌｄｅｓｕｌｆｕｒｉｚａ...     

总挥发性有机化合物(TVOC)室内空气质量评价标准的制订

当前，室内空气污染已成为社会关注的热点问题，总挥发性有机物(TVOC)是室内空气质量(IAQ)的重要指示指标。为了使测得的TVOC结果具有可比性，本文给出了TVOC的标准定义和分析方法。通过分析TVOC的来源，毒理学研究和流行病学研究结果，在参考国外相关标准的基础上，结合我国的实际情况和目前污染水平，提出了我国TCOC室内空气质量三级标准建议值。     

Urban stormwater disinfection, quality variability during storage and influence on the freshwater algae: Implications for reuse safety

Stormwater reuse is one of the most important ways to mitigate water resource shortage. However, urban stormwater contains many bacteria species, which threaten the reuse safety. Therefore, stormwater disinfection is highly needed. Although disinfection has been widely conducted in the drinking water and reclaimed water, it is rarely carried out for stormwater. This study collected the roof stormwater and undertook chlorination disinfection. Two typical bacteria, Escherichia coli (E. coli) and Staphylococcus aureus (S.aureus) were selected in this study to investigate the disinfection efficiency. It is found that bacteria species present in the stormwater had an important influence on disinfection efficiency while the original stormwater quality did not show an obvious affect. However, when the disinfected stormwater was stored, the stormwater quality was highly variable during its storage process and the variability was affected by bacteria species. The S.aureus containing stormwater showed a high variability of quality and S.aureus significantly regrew. However, the E.coli containing stormwater quality had a relatively low variability and E.coli did not significantly regrew. Additionally, it is noted that after storage, the dissolved form of stormwater was more positive to the freshwater algae's growth while the particulate form (including bacteria and other particulate matters) was less. This implies that a further treatment such as filtration is needed before the stored stormwater is recharged into receiving waters in order to remove particulate forms. These research outcomes can provide useful insight to effective stormwater disinfection and ensure reuse safety.     

荒漠化指标体系设计原则的研究

通过对国内外指标体系在指标选取与数据获得 ,分级量化与准确性校验方面存在问题的分析 ,认为目前荒漠化的分等定级有相当多的成分是用土地的绝对景观状态代替相对退化 ,影响了荒漠化分布范围、危害程度和防治效益的准确评估。土地退化生态基准初始面与终极面的恢复和确定 ,是建立规范科学指标体系的前提 ,由此提出了设计指标体系系统的三原则 :不同的生物气候带对应的生态基准面决定不同指标体系的地带性原则 ;不同空间尺度和不同传感器的分辨率决定不同指标体系的层次性原则和以基于3S景观类型为核心指标的原则     

连续挤压技术在铜管生产上的应用

随着对铜管需求量的不断增加 ,传统的铜管生产工艺已经不能满足需要。提出了一种高效节能的铜管生产新技术连续挤压生产工艺。     

关于自然资源受损评估

自然资源受损赔偿是一个比较复杂、而对环境保护却很重要的问题 ,文中根据国际溢油会议论文集中有关这方面的论述 ,特别是评估方法 ,作一综合介绍     

六六六热解废渣提取物对家兔皮肤的毒性

使用六六六热解废渣提取物对家兔进行了皮肤毒性试验。家兔皮肤经涂布提取物后,在涂布处及其他部位引起常有丘疹和小脓疱特征的痤疮型皮炎,与六六六热解生产多氯苯时暴露于其废渣烟尘中的工人所患氯疮相似。分析证明废渣中含有大量PCDDs和PCDFs,显然这是家兔皮肤反应和工人皮肤疾患的原因。引起家兔皮肤反应的最小涂布剂量为55μg混合物质,其中含2,3,7,8-TCDD约0.003μg。