应用量子化学算法研究水泥矿物结构与性能的关系

讨论了自洽场离散变分X_a（SCF-X_a-DV）量子化学分子轨道计算方法的基本特性、主要计算结果及其物理意义。评述了SCF-X_a-DV方法在研究水泥矿物结构与性能关系中的应用,研究体系包括硅酸二钙、硫铝酸盐、铁铝酸盐、铝酸盐、氟铝酸盐、钙钒石及它们的同系物系列。     

宝玉石矿床的找矿与评价

简要论述了宝玉石的找矿方法评价原则     

Slon立环脉动高梯度磁选机在金属矿选矿中的应用

阐述了Ｓｌｏｎ立环脉动高梯度磁选机的结构、工作原理及特点，并对Ｓｌｏｎ机在４个金属矿的应用情况作了简要介绍。     

The relationship between excluded mineral matter and the abrasion index of a coal

Predictions of the wear rates of components in grinding mills at pulverised coal-fired power stations are currently made using empirical relationships based on the ash content of the coals. However, modern coal characterisation techniques now allow the mineral inclusions in a coal that are responsible for the abrasive nature of the coal to be accurately characterised. Hence, there is scope to make improved predictions of wear based on a detailed knowledge of the mineral matter in a particular coal. It is first necessary, however, to understand the nature of the minerals and properties of the minerals in a coal that would contribute to abrasive wear. In this study known quantities of quartz, pyrite and slate have been added to a washed coal and the Abrasion Indices of the coal/mineral mixtures have been measured. The results show how the size, shape and hardness of excluded mineral matter contribute to the abrasive properties of a coal.     

伊利石开发利用初探

伊利石是一种新型的粘土矿物，本文对其开发利用进行了论述，建议加强伊利石的应用研究工作。     

Selenium Content of Bison, Elk and Mule Deer

Selenium (Se) content of elk, mule deer, bison and beef skeletal muscle was measured and compared. Selenium content was determined by graphite furnace after wet nitric acid digestion. Game samples did not differ in Se content but contained more Se than beef (wet weight) (P<0.05). On dry weight basis, deer contained more Se than elk, bison or beef (P<0.05). Within samples from male elk and deer, and elk and bison of both genders, there were interactions between species and muscles (P<0.05). Type of muscle and gender did not influence Se content (P<0.05). Selenium toxicity from consuming game that foraged in high selenium environments is remote.     

Effect of processing and cooking on the content of minerals and protein in pasta containing buckwheat bran flour

Research was conducted to determine the effect of processing and cooking on the ash content and mineral composition and on protein content and amino acid composition of spaghetti that was fortified with 250 g kg^?1 buckwheat bran flour (BBF). Extrusion and drying temperature had little or no effect on ash and mineral content of spaghetti containing BBF. Drying temperature did not affect protein content; however, a 31% reduction in lysine content was observed in spaghetti containing BBF dried at 90 °C. Cooking spaghetti fortified with BBF reduced ash content by 28%. Reduction in ash content was reflected by an average decrease in potassium of 62%, in copper of 45%, and in zinc of 11%. Cooking had little or no effect on content of calcium, iron, magnesium, or manganese. As a result of material leaching from spaghetti during cooking, the protein content and content of each amino acid (db) were greater in cooked than uncooked spaghetti. Copyright © 2007 Society of Chemical Industry     

硅酸盐矿物中的重要宝石

在各类矿物中，硅酸盐矿物宝石种类和数量最多，其中绿柱石、黄玉、碧玺、石榴石、锆石、橄榄石和长石均为重要的宝石。从矿物学特征、主要品种、鉴别标志及产状和产地等方面对硅酸盐矿物中的重要宝石进行了详细的阐述，指出了这些宝石的经济价值及我国开发研究利用宝石资源的前景．     

An overview of the bacteria and archaea involved in removal of inorganic and organic sulfur compounds from coal

Of special importance for biohydrometallurgy are acidophilic chemolithotrophic bacteria from a number of different taxonomic groups, namely: the genera of Thiobacillus and Leptospirillum, moderately thermophilic bacteria which we combined into the group Sulfobacillus-Alicyclobacillus, and archaea of the genera Sulfolobus, Acidianus, Metallosphaera, and Sulfurococcus.

These bacteria are able to oxidize one or more of the following compounds Fe⁺², S⁰ and sulfide minerals and to grow under extreme environmental conditions. Growth pH varies in the range from 1 to 5, growth temprature — from 2 to 90°C. They can tolerate high concentration of metal ions. They possess a great physiological, biochemical and genetic variability. Some of them are important for removal of inorganic sulfur compounds from coals.

Some types of coals and oils contain aromatic heterocyclic compounds with the C---S bond. Although a wide range of mostly heterotrophic and some chemolithotrophic bacteria, from bacteria and archaea to eucaryotes, participate in its transformation, only certain organisms have a unique capability of splitting this bond, which is impossible to be done by chemical means. They can remove organic sulfur-containing compounds from coal.

The possibilities of application of bacteria in biological processing of coals is discussed.