金矿床黄铁矿热电性质形成机理实验研究及其找矿应用

近年来采用黄铁矿热电性质特征寻找内生金矿床取得很大进展，但在具体矿床 应用中，不同学者有不同认识和结论。作者通过实验矿物学的研究方法，模拟金矿床形成的物 理化学条件，实验合成各种特征的黄铁矿晶体，深入探讨黄铁矿形成时物理化学条件对黄铁矿 的化学组成及热电性质的影响程度。论述黄铁矿热电性质及其矿物的铁硫比值及Ａｓ、Ｃｏ、Ｎｉ含 量变化的演变规律，对利用黄铁矿热电性质找金应用进行综合评述。     

缺氧及两级好氧处理岳阳化工总厂部分废水的运行与分析

介绍了岳阳化工总厂部分废水的处理工艺和设计，针对原水水质COD高等特点，采用缺氧，两级好氧工艺，该厂进生化池：COD浓度1000－14000mg/L,BOD3:COD=0.5左右；出生化池：COD浓度＜120mg/L，低于GB8978－1996表4中石油化工工业规定的Ⅱ级排放标准，BOD3＜10mg/L^ ，低于GB8978－1996表4石油化工工业规定的1级排放标准。     

加碱混凝沉淀法去除蓝皮制革废水中Cr^3＋及COD的研究

取自扬州某外资皮革厂的蓝皮制革废水含有大量的Cr^3＋和COD。通过对该废水加各种碱剂调节其pH值至8．3～8．5，均可将Cr^3＋去除90％以上，且对COD也有一定的去除效果。再对该废水加碱的同时试采用几种混凝剂进行混凝，Cr^3＋和COD的去除率都得到提高。研究表明：通过加碱混凝能取得更好的去除效果，PAC／PAM是最佳混凝剂，最佳投药量为0．4g／L，Cr^3＋可降到国家标准以下。     

图书馆文化在图书馆能力建设中的价值

在分析图书馆文化和图书馆能力的基础上,说明了图书馆文化和图书馆能力的辩证关系,进而探讨了图书馆文化在图书馆能力建设中是原动力,是一种心理和思想协调,强调的是人的发展,因而,体现了图书馆文化在图书馆能力建设中的价值.     

Persistently highest risk areas for hantavirus pulmonary syndrome: potential sites for refugia.

Interannual variation in the number of cases of human disease caused by hantaviruses in North America has been hypothesized to reflect environmental changes that influence rodent reservoir populations. This hypothesis postulates that when cases are rare reservoir populations are geographically restricted in patches of suitable habitat. Identifying these sites, which is needed to test the hypothesis, has proven to be a challenge. Satellite imagery of the U.S. Southwest has shown associations among the likelihood of human hantaviral disease and increases in the rodent populations, as well as increased prevalence of Sin Nombre virus (SNV) in rodent populations. In this study we characterize local areas that had environmental signatures that persisted as predicted highest risk sites for human disease through much of the 1990s. These areas represent a small percentage (0.3%) of the region. Exploratory analyses indicate that these areas were not randomly distributed, but were associated with certain landscape characteristics. Characteristics of elevation, slope, aspect, and land cover were associated with persistent high risk. Using multivariate Poisson regression to control for confounding effects, sites with deciduous- or mixed-forest land cover on moderate to steep slopes (>5 degrees) above 2130 m elevation were associated with increasing numbers of years at highest risk. These are candidate locations for refugia. Sites associated with cleared ground or shrubland were less often associated with high risk compared to reference conditions. The seasonal patterns of vegetation growth in persistently high-risk areas were compared to matched locations using MODIS (moderate resolution imaging spectroradiometer) NDVI (normalized difference vegetation index) during a time of a severe drought in the region from 2002 to 2004. Despite the drought and regardless of land cover, the NDVI in persistently highest risk areas had an early onset, with significantly higher levels of green vegetation that lasted longer than at comparable sites. These observations identify locations that can be monitored for the abundance of P. maniculatus and presence of SNV. If these sites are refugia, we predict they will be occupied by infected deer mice when other monitored sites are unoccupied.     

Detection of Escherichia coli in wastewater based on enzyme immunoassay

This research describes a fast detection method on the basis of enzyme-linked immunosorbent assay (ELISA) for Escherichia coli in drainage of wastewater treatment plants. Optimized conditions such as the reaction format (sandwich or direct), the concentrations of diluted horseradish peroxidase (HRP)-E. coli conjugate, and anti-HPR antibody and pretreatment of E. coli were studied. Those results showed that the linear range of detection for E. coli was 10 cfu/mL-6 × 10⁴ cfu/mL. Compared with conventional methods, it is a convenient and sensitive detection method with low cost.     

天山巴音布鲁克麝鼠资源及其保护利用

本文报道了１９７９年天山巴半布鲁克区外贸站从博斯腾湖引进麝鼠１０００余只，放养 于巴音布鲁克大小尤勒都期治泽地后１０年内的资源消长，本报记者麝鼠不同栖息地的环境状况，外形特征，引进麝射种的利弊及其保护利用等问题。     

液膜分离技术及其在环境工程中的应用

液膜分离技术是用于混合物分离的一种新型有效的技术,液膜是由两个不混溶相形成乳液,然后将乳液在第三相(连续相)中分散而成。本文介绍了液膜的组成、类型与结构、液膜分离的机理和操作工艺流程。井以若干实例说明了该项新技术在环境工程水处理中的广泛应用。     

不同pH值条件下Fe3+、Cu2＋和Zn2＋对厨余垃圾两相厌氧消化水解酸化过程的影响

通过间歇实验研究了在pH=7和不调节pH两种情况下添加不同浓度的Fe^3＋、Cu^2＋和Zn^2＋对厌氧消化水解酸化阶段有机酸组分和含量的影响。结果表明，pH=7时，添加50 mg/L Fe^3＋和30 mg/L Cu^2＋，有利于厨余垃圾水解酸化过程的进行，反应生成的VFA（挥发性脂肪酸）含量增加。不调节pH时，添加100 mg/L以下的Fe^3＋和Cu^2＋对VFA含量也有所促进，但乳酸含量也增加。在2种pH条件下添加Zn^2＋对反应的促进或抑制作用均不明显。     

Nitrous oxide and dinitrogen emissions from soil under different water regimes and straw amendment

In a laboratory study, soil amended with and without wheat straw (2.8 g kg(-1) soil) was incubated under 70% water holding capacity (WHC), continuously flooded and flooded/drained cycle conditions at 30 degrees C for 51 days. Dinitrogen and N2O evolution and ammonia volatilisation were measured during the incubation. Extractable NH4+-N and NO3--N were determined at the end of the incubation. Entrapped N2, N2O, and dissolved NH4+-N and NO3--N in drainage water were measured in the flooded/drained cycle treatment when the floodwater was drained. The results indicated that N loss through ammonia volatilisation was undetected in all treatments due to the low soil pH value (pHH2O= 5.87) and no air movement. The recovery of urea-15N as N2 was lowest in the continuously flooded treatments (0.75% and 0.96% with and without straw amendment, respectively), highest in the 70% WHC treatments (5.65% and 4.41%, respectively), and intermediate in the flooded/drained cycle treatments (1.79% and 2.65%, respectively). The recovery of urea-15N as N2O was in the same order as that of N2, negligible in the continuously flooded treatments, 0.01% and 0.07% in the flooded/drained cycle treatments, and 1.29% and 2.23% in the 70% WHC treatments, respectively. Peak N2O evolution rates were observed after the floodwater was drained but no substantial evolution was found after the soil was reflooded following drained periods. However, peak N2 evolution rates were observed after the onset of both drainage and re-flooding. Considerable quantities of N2 but no detectable N2O were entrapped in the flooded soil.