盐度胁迫对许氏平鲉鳃、头肾、脾脏超微结构的影响

对慢性盐度胁迫对许氏平鲉（Sebastes schlegeli）鳃、头肾、脾脏超徽结构的影响进行了研究。研究表明：经盐度为5的低盐胁迫30d后，鳃氯细胞顶端小窝较浅，胞质内徽细小管系统较松散，线粒体数量少且不发达，而经盐度为40的高盐胁迫后。鳃氯细胞的顶端小窝较深。胞质内徽细小管系统发达且分布密集，线粒体数量明显增加，表明细胞的泌氯功能和细胞代谢水平明显提高。水体盐度变化使实验鱼头肾中细胞排列的紧密程度、粒细胞结构发生了明显变化，而淋巴细胞、单核细胞未观察到明显变化。同时水体盐度变化对许氏平鲉脾脏中粒细胞的形态、结构影响也较显著。     

盐卤硼酸盐化学ⅩⅨ——氯柱硼镁石溶解及相转化研究

本文研究了温度、盐效应、晶体用量和搅拌速度对氯柱硼镁石在水中溶解过程及相转化的影响。实验结果表明,该复盐属不同步溶解,先溶脱MgCl·6H_2O,生成中间产物MgO·B_2O_3·4H_2O,随后发生相转化和结晶过程。最终产物在10—50℃时是多水硼镁石,在60℃时是柱硼镁石。提出了相转化机理,计算了溶解度、溶解热等热力学函数。     

元素分配与某些矿床分带关系及氯氟在元素迁移中的作用

元素分配与某些矿床分带关系及氯氟在元素迁移中的作用赵斌，赵劲松（中国科学院广州地质新技术所，广州５１０６４０）陈松乔，柏天宝（中国科学院地球化学研究所，贵阳５５０００２）关键词分配系数，矿床分带，氟氯元素迁移我国南方大厂、东坡、个旧、香花岭、大吉山、...     

REE Tetrad Effects in Rare—metal Granites

Described in this paper are the characteristics of tetrad effects of REE in rare-metal granites.Based on the analytical data and experimental geochemical data available,it is pointed out that the tetrad effects of REE in the granites are produced in the metal-fluid system.Intense fractional crystallization of granitic melt(containing REE accessary minerals)and its interaction with volatile-rich(F,Cl)fluid are the major factors leading to the tetrad effects of REE.From this,this paper presents a composite genetic model for high-degree fractional crystallization-volatile-rich fluid metasomatism of rare-metal granites.With the model,quantitative calculations have been made.Meanwhile,it is pointed out that the tetrad effects of REE can be used as an important indicator to distinguish mineralized granites from barren ones.     

菱镁矿轻烧的试验研究

菱镁矿深加工的必需步骤是煅烧,它直接影响深加工产品的质量。本文从轻烧镁用作氯氧镁水泥制品的角度,对菱镁矿的轻烧温度、影响因素、质量标准等作初步探讨。 1.菱镁矿的矿物化学特征分类菱镁矿从工艺的角度可划分为高硅高钙型、低硅高钙型、低硅低钙型、高硅低钙型4大类。从作氯氧镁水泥制品的角度,低硅低钙型和高硅低钙型的菱镁矿最好。我国除内蒙、河北邢台、西南某地、肃北别盖的菱镁矿属于高钙型的之外,其它皆为低钙型的。     

Dechlorination of trichloroethylene in solution over supported nano zero valent Fe and Cu/Fe bimetal on exfoliated graphite

Degradation of organic halides by reductive dehalogenation promoted by zerovalent metals is a very active research area. The use of nano-sized particles of zero valent iron （ZVI） or bimetallic combinations of ZVI currently attracts the most attention due to their high surface areas and high reactive activity. The introduction of second catalytic metals, such as Pd, Pt, Cu, or Ni, results in an even higher dehalogenation rate. The supported zero-valent iron materials have higher activity and greater flexibility for environmental remediation applications than other forms of ZVI. Nano ZVI supported on micro-scale exfoliated graphite was prepared by using KBH4 as the reducing agent in the H2O/ethanol solution of Fe^2＋ in the laboratory. Then the ethanol solution of Cu^2＋ was added to the fleshly prepared wet supported nano ZVI. The Fe/Cu bimetallic particles supported on the graphite were obtained because of the reduction and deposition of Cu on the Fe surface. The TEM image showed that iron particles were highly dispersed on the surface of graphite. In this study, supported zero valent Cu/Fe bimetallic nanoparticles were used for the dehalogenation of trichloroethylene （TCE） in batch experiments. The dechlorination rate of supported zero valent Fe/Cu bimetallic nanoparticles was greater than the supported nano ZVI. Supported Cu/Fe bimetal with 4 wt% Cu had the fastest dehalogenation rate than that with different content of Cu. When the nana FeO dosage was 5 g/L in the dehalogention system, 8 mg/L of TCE was completely dechlorinated within 4 hours. Increasing or decreasing the FeO dosage, the dechlorination rate could be worse. When the concentration of Fe^2＋ was 0.05 mol/L during the preparation by KBH4 reduction, the nano Cu/Fe particles exhibited the spheral shape with 50-80 nm in size. When the concentration of Fe^2＋ was higher （0.2 mol/L）, the nano particles were the palpus structure and had the poor dehalogenation effect on the TCE.     

羟氨镁铝石的高分辨透射电镜观察

羟氯镁铝石（ｋｏｅｎｅｎｉｔｅ）为典型的异类结构基元间层矿物。结构以氯化物层（Ｎａ、Ｍｇ）Ｃｌ２和氢氧化物层（Ｍｇ、Ａｌ）（ＯＨ２）沿ｃ方向规则交互构成,以前的威研究认为构成羟氢镁铝石的两个亚结构有不同的空间群和晶胞参数。本次以高分辨透射电子显微镜的研究结果表明,羟氢镁镁铝石在ｃ方向的重复周期为１．０８ｎｍ左右,在ａ方向上没有显示出层失配特点,说明它是一种有序的晶体。对结构基元层层间的静电作用势能