载La(Ⅲ)-和Fe(Ⅲ)-氨基膦酸型螯合树脂对氟吸附性能的比较

研究并比较了载La（Ⅲ）和载Fe（Ⅲ）大孔氨基膦酸型螯合树脂对饮用水中氟离子的吸附特性。氟在载La（Ⅲ）和载Fe（Ⅲ）的螯合树脂上的吸附不随pH的变化而改变,载金属螯合树脂对氟的饱和吸附容量分别为3.78、3.55mg/g,吸附方式符合Freundlich吸附等温式,代表性竞争离子不影响氟在螯合树脂上的吸附。结果表明载Fe（Ⅲ）和载La（Ⅲ）的螯合树脂是一种有前景的饮水氟去除吸附剂。     

我国SO_2和NO_X排放强度地理分布和历史趋势

根据我国燃料消费、燃料的含硫量和硫与氮氧化物排放因子，计算我国各地区ＳＯ_２和ＮＯ_Ｘ排放强度地理分布。结果指出，我国原煤含硫量为１．１２％。１９９０年全国ＳＯ_２和ＮＯ_Ｘ的排放量分别为１７５１．８万ｔ和８４２．２万ｔ，排放强度最大的地区是中东部地区，即辽宁、河北、山东、山西和浙江。这些地区平均排放强度大于７ｔ／ｋｍ￣２·ａ。还估算了全国１９５０～１９９０年ＳＯ_２和ＮＯ_Ｘ历年的排放量。     

中─高级变质相中水热流体的形成与作用

固体地壳中流体是普遍存在的，中—高级变质相中的矿物并非只发生晶体塑性变形，溶解和溶移作用在非糜棱岩化岩石中占主导地位，因为高温高压环境下存在的水热流体，在变质变形作用中起着至关重要的作用。在周围分布有网络状进进剪切带的递进缩短带中，与应交梯度有直接关系的单个矿物的位错密度梯度在其晶体边缘形成，产生了化学位梯度，从而使矿物边缘发生溶解。变形分解作用是产生这一过程的动力，并为流体汇聚形成水热循环系统提供了空间。     

能源规划环境影响评价内容框架实践与探讨

规划环评是环评领域一个新方向。虽然环评法已经实施，但目前在实际执行过程中，对编制的规划如何按照规划环评导则组织规划环评以及对规划环评思路和内容框架尚没有具体的研究。从实践出发并结合环境与发展综合决策的角度，以浙江省2010年电力发展规划及2020年展望的能源类规划环评为案例，对能源类规划环评的内容框架作初步研究。     

Analysis and improving ways for water condition in winter wheat field of dryland in subhumid areas of the loess plateau

Based on the soil moisture data from the locating experiments from 1986-1990, and using the water balance method, the water supply and demand state in the field of winter wheat, and the ways for improving water condition in dryland of subhumid by dry area of the Loess Plateau were studied. The results suggested that a low precipitation satisfying ratio of 42.9%-58.8% appears in the growing period of winter wheat, and the yield, to a great extent depends on the water that was stored in deep soil layer in the previous rainy season. The filed trial results showed that tillage in the summer fallow period,straw cover, soil moisture regulation with adequate fertilization, crop rotation and proper croppingsystem could be the efficient ways for improving the water condition,and for the exploitation and utilization of natural water resources(both precipitation and soil water) in the winter wheat field of dryland.     

In vitro characteristics of human fetal cells obtained from chorionic villus sampling and amniocentesis

In vitro characteristics of human fetal cells have been investigated after chorionic villus sampling at the first trimester and amniocentesis at the second trimester of pregnancy. Light microscopy revealed heterogeneous morphology of cell types in both the chorionic villus culture and the amniotic fluid cultures. Based on the experiments performed, chorionic villus cells are more sensitive to pronase, trypsin, and versene during subculture and have a higher DNA content per single cell and release more [¹²⁵I]-Beta-human chorionic gonadotropin into culture medium than those found in amniotic fluid cells. The practical applications of this study are discussed.     

高硫原油加工过程硫回收水平分析

分析了金陵分公司最近三年来加工高硫原油带入的硫在全厂炼油过程的分布情况。随着原油加工量及含硫量的快速增长，硫回收能力凸现不足，表明目前正在加速建设的加氢精制和硫磺回收装置是十分必要的，这将进一步提高综合硫回收水平。从长远来看，还需采用扩大加氢工艺能力，在提升产品质量的同时达到减少硫向环境排放的目的。     

Application of compost in agricultural practice could potentially cause contamination of foodstuffs with pathogenic bacteria such as Escherichia coli O157:H7. This study investigated pathogenic bacteria in compost collected from the compost facilities, an

IntroductionIncreasing public interests have been concerned onsafety foods and the environmental aspects recently,especially on the so-called organic foods , which are madefromcrops grown with organic fertilizers or compost but notchemical fertilizers .Pu…     

北京平原土壤中若干元素背景含量的区域分异

本文根据计算机绘制的北京平原地区土壤元素等含量线图和趋势面图,揭示了土壤元素的区域分异规律,并对其引起区域分异的环境因素进行了分析。     

11种有机磷农药对海洋微藻致毒效应的研究

通过研究不同盐度条件下１１种有机磷农药对扁藻的相对增长率和叶绿素ａ含量的影响，得到了Ｓ＝３０和Ｓ＝２０时的半数有效浓度，并比较其大小。盐度作为环境因子，影响到有机磷农药的毒性。研究发现，遥有机磷农药在低浓度时出现一定限度的促生长作用；容易进攻细胞膜的有机磷农药对扁藻的致毒性相对较强；此外，有机磷农药的毒性大小与其结构密切相关含有苯环结构的有机磷农药毒性大小不含有苯 有机磷农药的毒性。