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Spatial and Seasonal Dynamics of Dissolved and Suspended Nutrients in the Water Column of Meromictic Lake Shira

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 173-174页

作者： Egor ZADEREEV Alexander TOLOMEEV Anton DROBOTOV Institute of Biophysics sb ras 660036 Akademgorodok Krasnoyarsk Russia Siberian Federal University

1 Introduction The vertical stratification of the water column has a significant impact on the spatial distribution of aquatic organisms,the dynamics and structure of the food web in

关键词： Meromictic lake air temperature stratification seston nutrients stoichiometric ratios

A correlation between structural changes in a Ni-Cu catalyst during decomposition of ethylene/ammonia mixture and properties of nitrogen-doped carbon nanofibers

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Journal of Energy Chemistry 2013年第2期22卷 270-278页

作者： O. Yu. Podyacheva A. N. Shmakov A. I. Boronin L. S. Kibis S. V. Koscheev E. Yu. Gerasimov Z. R. Ismagilov Boreskov Institute of Catalysis Pr. Akademika Lavrentieva 5 Novosibirsk 630090 Russia Novosibirsk State University Ul. Pirogova 2 Novosibirsk 630090 Russia Institute of Coal Chemistry and Material Science Pr. Sovetskiy18 Kemerovo 65000 Russia

Changes of a 65Ni25Cu10A1203 catalyst consisting of Ni-enriched and Cu-enriched alloys were investigated in the bulk and on the surface during the growth of nitrogen-doped carbon nanofibers （N-CNFs） by decomposition of a 50%C2I-I4/50%NH3 mixture using in situ X-ray diffraction （XRD） analysis, ex situ X-ray photoelectron spectroscopy （XPS） and transmission electron microscopy （TEM） techniques. It was shown that N-CNF growth at 450-650 ℃is accompanied by dissolution of carbon and nitrogen in the Ni-enriched alloy, whereas Cu-enriched alloy remains inactive. A correlation between nickel and copper surface concentrations and properties of N-CNFs in relation to the nitrogen content was found. It was demonstrated that phase composition of the catalyst during N-CNF growth determines the type of N-CNFs structure.

关键词： carbon nanofibers nitrogen-doped carbon nanofibers XRD in situ XPS catalyst

Thermodynamic Model of Uranium and Arsenic Accumulation in Saline Lakes

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 135-136页

作者： Olga GASKOVA Vitaly ISUPOV Alexander VLADIMIROV Stepan SHVARTSEV Sobolev Institute of Geology and Mineralogy Siberian Branch of Russian Academy of Sciences Novosibirsk State University Institute of Solid State Chemistry and Mechanochemistry Siberian Branch of Russian Academy of Sciences Tomsk State University Tomsk Branch of the Trofimuk Institute of Oil and Gas Geology and Geophysics Siberian Branch of Russian Academy of Sciences

1 Introduction The attractiveness of Shaazgai-Nuur Soda Lake(pH9.2-9.4)as an alternative metal source is explained by the high concentration of dissolved uranium(~1 mg/l)due to the location of water drainage territory... 详细信息

关键词： saline lakes uranium arsenic sorption thermodynamic model calcite goethite.