某铀矿工人头发中总α,总β,铀,钍放射性水平的调查

本文对某铀矿职业工人和非职业工人头发中的总β、总α放射性水平和铀、钍含量进行了分析测定.结果表明,该矿工人体内铀和钍的蓄积量均在正常放射性本底水平范围内,从头发中检验未观察到工人体内铀、钍放射性水平有明显的升高.     

绵阳市环境放射源分布规律

对绵阳市的环境放射源基本情况进行了分析，弄清了放射源的品种、数量。摸索出放射性核素及Ｘ射线装置在地域、行业和剂量方面的分布规律，揭示出环境放射性管理工作的重点。     

环境中萘和甲基萘的气相色谱测定

针对发生的甲基萘油车泄漏事故进行了水样和空气样品中萘和甲基萘的测定，水样中直接进样，对空气样品则以甲醇为吸收液吸收，富集，氢火焰毛细管色谱法测定。     

Adsorption of zinc on manganite(γ-MnOOH): particle concentration effect and adsorption reversibility

The adsorption and desorption processes of Zn(Ⅱ) on τ-MnOOH as a function of particle concentrations (Cp) were studied. An obvious Cp effect was observed in this adsorption system. The degree of adsorption hysteresis increased greatly with the increasing of Cp, indicating that the extent of the real metastable-equilibrium states deviating from the ideal equilibrium state was enhanced with the increasing of Cp. The Cp-reversibility relationship confirmed the metastable-equilibrium adsorption (MEA) inequality (Pan, 1998a), which was the core formulation of the MEA theory. Because the MEA inequality was based on the basic hypothesis of MEA theory that adsorption densitιy ι is not a state variable, the Cp-reversibility relationship gave indirect evidence to the basic hypothesis of MEA theory.     

汕头港湾附近水域潮流特征和污染物扩散的数值计算 Ⅰ汕头港湾附近水域潮流特征及数值模拟

汕头港湾附近水域的潮流特征，由于拦沙堤的建成及港池附近河道变窄而发生了一些变化。本文在取得现场实测资料的基础上，采用沿深度平均的二维浅水潮波方程，对该水体的潮流场进行了数值模拟计算，重现出潮流场在一个潮周期中的变化过程，分析潮流对污染扩散的作用。     

多环芳烃的几种理化参数与LC_(50)的相关性研究

对多环芳烃(PAHS)4种理化参数(K;W、Sw。X Vv。)与 LCO的相关关系进行了研究,建立了 4种一元线性回归方程。结果表明,4种参数的相关系数分别为:0.刀66、08083、09488、0.9570,经r检验,后两种属高度显著相关.用所建立的一元线性回归方程对7种PAHS的LC。进行估算,估算值与实测值相比,平均相对误差分别为58.84％、32.23％、1761％、198％,用l和V＊.H对LClj进行估算的估算精度也较高。经比较,提出用(。估算P＊比对麦穗鱼＊CO的新方法。     

斯德哥尔摩,人类环保之船从这里启航

1969年。经由瑞典政府提议．联合国大会决定1972年在瑞典首都斯德哥尔摩召开联合国人类环境会议。这是联合国历史上首次以环保为主题的会议．是人类环境意识觉醒的标志．在人类社会发展史上具有里程碑式的意义。1972年6月5日，会议在斯德哥尔摩隆重开幕。133个国家的1300多名代表出席了这次会议。会议通过了《联合国人类环境会议宣言》和《行动计划》。宣告了人类环境新观念的诞生，达成了“只有一个地球”．人类与环境是不可分割的“共同体”的共识。1972年6月5日。全球环境保护的航船从斯德哥尔摩启航。33年过去了，让我们重回斯德哥尔摩，去寻找历史的轨迹．去了解这座环保之都的未来航向。[编者按]     

江苏宿迁地震台短水准测量场地改造的探讨

地震前兆数据观测中,经常会遇到各种干扰,有的干扰可以很快排除,但有的是无法排除的.目前我们的短水准受到铺路影响就属于后一种情形,它直接影响到我们测量场地的生存.为了让观测数据得以延续,我们努力寻找解决问题的办法,最后采用把观测点平移再对比观测的方法来解决问题.     

Influence of glucose feeding on the ligninolytic enzyme production of the white-rot fungus Phanerochaete chrysosporium

The present work studied the influence of glucose feeding on the ligninolytic enzyme production of Phanerochaete chrysosporium in a nitrogen-limited (C/N ratio is 56/8.8 mmol/L) medium. Several sets of shaking flask experiments were conducted. The results showed that 2 g/L glucose feeding on the first day of the culture (24 h after the inoculation) simulated both fungal biomass growth and enzyme production. The manganese peroxidase (MnP) activity was 2.5 times greater than that produced in cultures without glucose feeding. Furthermore, the glucose feeding mode in fed-batch culture was also investigated. Compared to cultures with glucose feeding every 48 h, cultures with glucose feeding of 1.5 g/L (final concentration) every 24 h produced more enzymes. The peak and total yield of MnP activity were 2.7 and 3 times greater compared to the contrast culture, respectively, and the enzyme was kept stable for 4 days with an activity of over 200 U/L. Translated from Acta Scientise Circumstantiae, 2007, 27(3): 363–368 [译自: 环境科学学报]     

汞的环境地球化学研究进展

介绍了目前对环境样品中总汞及其各形态未的分析方法以及大气和水生生态系统中汞的研究进展，并指出，燃煤、汞齐法采金和人造水库等引起的环境汞污染问题以及汞在热带地区水生生态系统中的迁移转化规律等是目前的研究热点。