Rare-earth mineralization in early Carboniferous coals of the Volga-Ural region

© 2014, Allerton Press, Inc. This study presents new ICP spectroscopy data on lanthanide concentrations in early Carboniferous coal deposits in the Volga-Ural region. The results confirmed an overall LREE over HREE enrichment and emphasized the role of carbonate host strata as a major factor that is responsible for REE enrichment and geochemical anomalies. The results of this study were also used to identify the modes of REE occurrences in the organic and inorganic constituents of coal

Peculiarities of Coverage of Environmetal Problems in the Publications of Novaya Gazeta

В статье рассматриваются практики освещения экологических вопросов на страницах массмедиа. Объектом исследования стали публикации на экологическую тему в «Новой газете»: функции текстов, жанры и другие особенности.The article discusses the importance of covering environmental issues on the pages of the mass media. Attention is focused on the features of environmental problems in the publications of Novaya Gazeta. The object of the study is the environmental theme in the Russian media. The subject of the research is publications on the environmental theme in Novaya Gazeta

A comparison of finely dispersed mineral components in fossil coals of the Kama and Donets basins

This study presents the results of SEM-EDX analysis of the mineral components of coals from the Kama (Volga-Ural region) and Donets basins and discusses the characteristics of the depositional environments and conditions of coalification. The results reveal differences in the mineral composition of coals from these two basins. © 2013 Allerton Press, Inc

Electron transport, penetration depth and upper critical magnetic field of ZrB12 and MgB2

We report on the synthesis and measurements of the temperature dependence of resistivity, R(T), the penetration depth, l(T), and upper critical magnetic field, Hc2(T), for polycrystalline samples of dodecaboride ZrB12 and diboride MgB2. We conclude that ZrB12 as well as MgB2 behave like simple metals in the normal state with usual Bloch-Gruneisen temperature dependence of resistivity and with rather low resistive Debye temperature, TR=280 K, for ZrB12 (as compared to MgB2 with TR=900 K). The R(T) and l(T) dependencies of ZrB12 reveal a superconducting transition at Tc=6.0 K. Although a clear exponential l(T)dependence in MgB2 thin films and ceramic pellets was observed at low temperatures, this dependence was almost linear for ZrB12 below Tc/2. These features indicate s-wave pairing state in MgB2, whereas a d-wave pairing state is possible in ZrB12. A fit to the data gives a reduced energy gap 2D(0)/kTc=1.6 for MgB2 films and pellets, in good agreement with published data for 3D \pi - sheets of the Fermi surface. Contrary to conventional theories we found a linear temperature dependence of Hc2(T) for ZrB12 (Hc2(0)=0.15 T).Comment: 8 pages, 10 figures, submitted to JET

Diversity in fertility potential and organo-sulphur compounds among garlics from Central Asia

Extending the collection of garlic (Allium sativum L.) accessions is an important means that is available for broadening the genetic variability of this cultivated plant, with regard to yield, quality, and tolerance to biotic and abiotic traits; it is also an important means for restoring fertility and flowering. In the framework of the EU project Garlic and Health, 120 garlic accessions were collected in Central Asia - the main centre of garlic diversity. Plants were documented and thereafter maintained in field collections in both Israel and The Netherlands. The collection was evaluated for biological and economic traits. Garlic clones vary in most vegetative characteristics (leaf number, bulb size and structure), as well as in floral scape elongation and inflorescence development. A clear distinction was made between incomplete bolting and bolting populations; most of the accessions in the latter populations produced flowers with fertile pollen and receptive stigma. Wide variations were recorded with regard to differentiation of topsets, their size, number and rapidity of development. Furthermore, significant variation in organo-sulphur compounds (alliin, isoalliin, allicin and related dipeptides) was found within garlic collections and between plants grown under differing environmental conditions. Genetic fingerprinting by means of AFLP markers revealed three distinct groups within this collection, differing also in flowering ability and organo-S content

Rare-earth mineralization in early Carboniferous coals of the Volga-Ural region

© 2014, Allerton Press, Inc. This study presents new ICP spectroscopy data on lanthanide concentrations in early Carboniferous coal deposits in the Volga-Ural region. The results confirmed an overall LREE over HREE enrichment and emphasized the role of carbonate host strata as a major factor that is responsible for REE enrichment and geochemical anomalies. The results of this study were also used to identify the modes of REE occurrences in the organic and inorganic constituents of coal

A comparison of finely dispersed mineral components in fossil coals of the Kama and Donets basins

This study presents the results of SEM-EDX analysis of the mineral components of coals from the Kama (Volga-Ural region) and Donets basins and discusses the characteristics of the depositional environments and conditions of coalification. The results reveal differences in the mineral composition of coals from these two basins. © 2013 Allerton Press, Inc

Rare-earth mineralization in early Carboniferous coals of the Volga-Ural region

© 2014, Allerton Press, Inc. This study presents new ICP spectroscopy data on lanthanide concentrations in early Carboniferous coal deposits in the Volga-Ural region. The results confirmed an overall LREE over HREE enrichment and emphasized the role of carbonate host strata as a major factor that is responsible for REE enrichment and geochemical anomalies. The results of this study were also used to identify the modes of REE occurrences in the organic and inorganic constituents of coal

Rare-earth mineralization in early Carboniferous coals of the Volga-Ural region

© 2014, Allerton Press, Inc. This study presents new ICP spectroscopy data on lanthanide concentrations in early Carboniferous coal deposits in the Volga-Ural region. The results confirmed an overall LREE over HREE enrichment and emphasized the role of carbonate host strata as a major factor that is responsible for REE enrichment and geochemical anomalies. The results of this study were also used to identify the modes of REE occurrences in the organic and inorganic constituents of coal

A comparison of finely dispersed mineral components in fossil coals of the Kama and Donets basins

This study presents the results of SEM-EDX analysis of the mineral components of coals from the Kama (Volga-Ural region) and Donets basins and discusses the characteristics of the depositional environments and conditions of coalification. The results reveal differences in the mineral composition of coals from these two basins. © 2013 Allerton Press, Inc