长江中下游海相三叠系膏盐层与铜(金)、铁矿床

长江中下游海相三叠系膏盖层中含有很大比例的大、中型铜（金）、铁、多金属矿床。膏盐层不仅是铜（金）、铁矿床的主要赋矿层位之一，而且是部分成矿金属的矿源层；膏盐层还为燕山期岩浆提供部分钠质、钾质及挥发组分，影响岩浆演化的方向，改变了含矿流体的性质；另外，从岩体和矿床中金属硫化物中流同位素重硫成分的增高，说明在成者、成矿过程中，膏盐层是硫的供应者之一。因此膏盐层与铜（金）、铁、多金属矿床之间存在着特殊的成因联系。     

Characteristics of phosphorus chemistry and its geographical distribution in the Haihe River valley,North China

ＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｐｈｏｓｐｈｏｒｕｓｃｈｅｍｉｓｔｒｙａｎｄｉｔｓｇｅｏｇｒａｐｈｉｃａｌｄｉｓｔｒｉｂｕｔｉｏｎｉｎｔｈｅＨａｉｈｅＲｉｖｅｒｖａｌｌｅｙ，ＮｏｒｔｈＣｈｉｎａＪｉａｎｇＧａｏｍｉｎｇ；ＨｕａｎｇＹｉｎｘｉａｏ；Ｌ...     

Quantitative structure - activity study on the reductivedehalogenation potency of the halogenated aromatics

Ｑｕａｎｔｉｔａｔｉｖｅｓｔｒｕｃｔｕｒｅ－ａｃｔｉｖｉｔｙｓｔｕｄｙｏｎｔｈｅｒｅｄｕｃｔｉｖｅｄｅｈａｌｏｇｅｎａｔｉｏｎｐｏｔｅｎｃｙｏｆｔｈｅｈａｌｏｇｅｎａｔｅｄａｒｏｍａｔｉｃｓＨｕａｎｇＱｉｎｇｇｕｏ；ＷａｎｇＬｉａｎｓｈｅｎｇ；Ｈａｎ...     

An evaluation of quality assurance to monitor acidprecipitation by using ion balancein Guizhou, China

ＡｎｅｖａｌｕａｔｉｏｎｏｆｑｕａｌｉｔｙａｓｓｕｒａｎｃｅｔｏｍｏｎｉｔｏｒａｃｉｄｐｒｅｃｉｐｉｔａｔｉｏｎｂｙｕｓｉｎｇｉｏｎｂａｌａｎｃｅｉｎＧｕｉｚｈｏｕ，ＣｈｉｎａＫａｎｇＤｅｍｅｎｇ（ＲｅｓｅａｒｃｈＣｅｎｔｅｒｆｏｒＥｃｏ－Ｅｎｖｉｒ...     

Sea water intrusion in coastal areas of Yellow Seaand Bohai Sea

ＳｅａｗａｔｅｒｉｎｔｒｕｓｉｏｎｉｎｃｏａｓｔａｌａｒｅａｓｏｆＹｅｌｌｏｗＳｅａａｎｄＢｏｈａｉＳｅａＳｈｅｎｇＸｕｅｂｉｎ；ＳｕｎＪｉａｎｚｈｏｎｇ；ＤａｉＺｈａｏｈｕａ（ＲｅｓｅａｒｃｈＣｅｎｔｅｒｆｏｒＥｃｏ－ＥｎｖｉｒｏｎｍｅｎｔａｌＳｅ...     

Seasonal changes of endogenous ABA and cytokininsin environmental adaptation of differentecotypes of reed plants

ＳｅａｓｏｎａｌｃｈａｎｇｅｓｏｆｅｎｄｏｇｅｎｏｕｓＡＢＡａｎｄｃｙｔｏｋｉｎｉｎｓｉｎｅｎｖｉｒｏｎｍｅｎｔａｌａｄａｐｔａｔｉｏｎｏｆｄｉｆｆｅｒｅｎｔｅｃｏｔｙｐｅｓｏｆｒｅｅｄｐｌａｎｔｓＷａｎｇＨｏｎｇｌｉａｎｇ，ＺｈａｎｇＣｈｅｎｇｌｉ...     

Effects of Ca2+ ions antagonistic to Al3+ ions poisoningin root growth , cell division and nucleolusin root tip cells of Allium cepa

The effects of different aluminium chloride concentrations together with varying calciumchloride concentrations on root growth, cell division and nucleoli in root tip cells of Allium cepa werestudied. The concentrations used for aluminium chloride were 10^-4, 10^-3 and 10^-2 mol/L ; and for calcium chloride were 10^-5 , 10^-4 , 10^-3 and 10^-2 mol/L, respectively. The results showed that after thetreatments with 10^-2 to 10^-3 mol/L Al³⁺ , root growth was severely inhibited , a large nurnber of thecells with c-mitosis were induced and the nucleolar material was extruded from the nucleus into the cytoplasm. However , the treatments with 10^-2 to 10^-3 mol/L of Al³⁺ together with 10^-2)to 10^-5 mol/LCa²⁺ suggested that Ca²⁺ gave the obviously protective effects against Al³⁺ poisoning in root growth.cell division and nucleoli of the root tip cells in A. cepa. The possible mechanism of these protective effects of Ca²⁺) is also briefly discussed.     

稻田土壤反硝化厌氧甲烷氧化菌的时空分布与群落结构分析

由"Candidatus Methylomirabilis oxyfera"主导发生的以甲烷和亚硝酸盐为底物的反硝化厌氧甲烷氧化反应(nitrite-dependent anaerobic methane-oxidizing,n-damo)的发现,将生物地球化学碳循环和氮循环以新的方式结合起来.本研究以夏季和冬季江阴稻田土壤柱状样品为研究对象,对稻田土壤M.oxyfera-like菌的时空分布和群落结构进行了考察.M.oxyfera-like菌16S rRNA基因的定量PCR结果显示M.oxyfera-like菌的丰度随着土壤深度的增加而增加,且无明显季节性差异,60~200 cm深度的稻田土壤是M.oxyfera-like菌的高丰度区域.M.oxyfera-like菌pmo A基因的系统发育分析和生物多样性分析显示M.oxyfera-like菌的群落结构具有一定的时空异质性,且生物多样性随着土壤深度的增加而增加.这些结果都说明江阴稻田深层土壤(60~200 cm)是适宜M.oxyfera-like菌生存的生态环境.     

中小型燃煤烟气脱硫脱硝实验研究

介绍了选用熟石灰Ca(OH)2作脱硫剂的半干法烟气脱硫工艺来脱除SO2;选用NH3作还原剂,活性炭作催化剂,在低温(＜200℃)和氧气存在的条件下选择性催化还原(SCR法,属干法)NOx的技术来脱除NOx.实验表明:脱硫率＞92.5%,脱硝率＞74.6%,半干法烟气脱硫工艺和干法(SCR法)烟气脱硝技术适宜于中小型燃煤烟气的脱硫脱硝.     

直接进样-离子色谱法测定饮用水中痕量溴酸盐

对直接测定饮用水中痕量溴酸盐的离子色谱方法进行了优化 .选用高容量的碳酸盐选择性离子色谱柱 ,以 7 2mmol·l- 1 Na2 CO3 2mmol·l- 1 NaOH为流动相 ,可消除样品中碳酸盐、次氯酸根和高浓度氯离子的干扰 ,直接进样测定饮用水中 2 μg·l- 1 溴酸盐 ,其检出限为 0 6μg·l- 1 .样品经微波浓缩后 ,对溴酸盐的检出限可降为 0 0 6μg·l- 1 .方法用于北京市饮用水中溴酸盐浓度的测定 ,结果满意