scholarly journals Geological nature of mineral licks and the reasons for geophagy among animals

2016 ◽  
Author(s):  
Alexander M. Panichev ◽  
Vladimir K. Popov ◽  
Igor Y. Chekryzhov ◽  
Ivan V Seryodkin ◽  
Alexander A. Sergievich ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Volcanic Belt ◽  
Sikhote Alin ◽  
Forage Plants ◽  
Geological Conditions ◽  
Mineral Substances ◽  
Mineral Licks ◽  
Toxic Concentrations ◽  
Early Cenozoic

Abstract. In this paper, the reasons for geophagy (the eating of rocks by wild herbivores) in two regions of the Eastern Sikhote-Alin volcanic belt are considered. The mineralogical and chemical features of the consumed rocks, and also the geological conditions of their formation are investigated. A comparative analysis of the mineral and chemical composition of the consumed rocks and the excrement of the animals, almost completely consisting of mineral substances, is carried out. It is established that the consumed rocks are hydrothermally-altered rhyolitic tuffs located in the volcanic calderas and early Cenozoic volcano-tectonic depressions. They consist of 30–80 % from zeolites (mainly clinoptilolites) and smectites, possessing powerful sorption properties. According to the obtained data, the main reason for geophagy may be connected with the animals’ urge to discard excessive and toxic concentrations of certain elements that are widespread in specific habitats and ingested with forage plants.

scholarly journals Geological nature of mineral licks and the reasons for geophagy among animals

2017 ◽  
Vol 14 (11) ◽  
pp. 2767-2779 ◽  
Author(s):  
Alexander M. Panichev ◽  
Vladimir K. Popov ◽  
Igor Yu. Chekryzhov ◽  
Ivan V. Seryodkin ◽  
Alexander A. Sergievich ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Volcanic Belt ◽  
Sikhote Alin ◽  
Forage Plants ◽  
Geological Conditions ◽  
Mineral Substances ◽  
Mineral Licks ◽  
Toxic Concentrations ◽  
Early Cenozoic

Abstract. In this paper, the reasons for geophagy (the eating of rocks by wild herbivores) in two regions of the eastern Sikhote-Alin volcanic belt are considered. The mineralogical and chemical features of the consumed rocks, as well as the geological conditions of their formation, are investigated. A comparative analysis of the mineral and chemical composition of the consumed rocks and the excrement of the animals, almost completely consisting of mineral substances, is carried out. It is established that the consumed rocks are hydrothermally altered rhyolitic tuffs located in the volcanic calderas and early Cenozoic volcano-tectonic depressions. They consist of 30–65 % from zeolites (mainly clinoptilolites) and smectites, possessing powerful sorption properties. According to the obtained data, the main reason for geophagy may be connected with the animals' urge to discard excessive and toxic concentrations of certain elements that are widespread in specific habitats and ingested with forage plants.

scholarly journals Kwestia chronologii, typologii i pochodzenia szklanej biżuterii z wczesnośredniowiecznego ośrodka grodowego w Gnieźnie

2020 ◽  
Vol 25 ◽  
pp. 247-289
Author(s):  
Joanna Sawicka
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Glass Composition ◽  
Starting Material ◽  
14C Dating ◽  
Glass Strip ◽  
X Ray ◽  
General Manner ◽  
Physico Chemical ◽  
Early Settlement

The study presents 175 artefacts from the settlement center in Gniezno – beads and rings. The materials come from settlement levels from around the mid-10th to the 13th centuries. The latest chronological findings based on 14C dating have made it possible to refine the dating, especially of the early settlement levels of the stronghold, where the vast majority of glass artefacts come from. Threeba sic groups of beads have been distinguished based on the technique of their production – beads made of a drawing a tube, the technique of winding a glass strip, as well as casting and sintering. The results of 7 physico-chemical analyzes of the glass composition (performed with the X-Ray Fluorescence, XRF method) are presented. Physicochemical analyzes of the chemical composition of the tested beads made it possible to determine the technological group and the type of glass. An attempt was made to explain the origin of the starting material (glass) for jewelery. A comparative analysis made it possible to indicate in a general manner possible manufacturers and to outline the likely directions of the influx of these glass ornaments to Gniezno.

scholarly journals ECOGEOCHEMICAL DIAGNOSTICS CONDITION OF URBAN ENVIRONMENT ON POLLUTION SNOW COVER OF VORONEZH CITY

2015 ◽  
Vol 4 (4) ◽  
pp. 121-126
Author(s):  
Tatiana Ivanovna Prozhorina ◽  
Semyon Aleksandrovitch Kurolap ◽  
Nadezhda Ivanovna Yakunina
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Snow Cover ◽  
Urban Environment ◽  
Chemical Elements ◽  
Rapid Assessment ◽  
High Sorption ◽  
Express Methods ◽  
Functional Areas ◽  
The City

Currently, the most popular are the express methods of quality control of the environment, which permit a relatively rapid assessment of ecological and geochemical situation. one such method is based on the use snow cover. snow has a high sorption capacity and is informative in identifying the object of man-made pollution of the urban environment. the paper presents the results of a study of the chemical composition of snow that had fallen in Voronezh during winter 2015. snow samples were taken in the period prior to snowmelt in various functional areas of the city. in order to identify the degree of technogenic impact on the various parts of the city of Voronezh, was made a comparative analysis of the results:аccording to the actual presence of pollutants in precipitation for the study of functional areas;сalculate the rate on the concentration of chemical elements for test samples of snow.according to the degree of mineralization and dust content in snow can be seen technogenic pressure on environment.therefore, a comparative analysis of the degree of contamination of snow in the various functional areas of the city were carried out for the two indicators of the chemical composition - the total mineralization and suspended particles(dust).the results of the analysis of the chemical composition of the melt water indicate an increased level of technogenic pollution of snow cover in all investigated functional areas of Voronezh.

scholarly journals Geodynamic and structural factors of porphyritic objects localization in Sikhote-Alin

2018 ◽  
Vol 56 ◽  
pp. 04020
Author(s):  
Viktor Nevstruyev ◽  
Olga Kozlova
Keyword(s):  
Porphyry Copper ◽  
Volcanic Belt ◽  
Structural Factors ◽  
Sikhote Alin ◽  
The Andes ◽  
Tectonic Disturbances ◽  
Pacific Slab ◽  
Moho Depths ◽  
Objects Localization

Ore bearing porphyritic systems of Sikhote-Alin form linear zones in Cretaceous volcanic belt. They are limited to zones of tectonic disturbances at Moho depths of 19-25 mi (30-40 km). Pacific slab lies at around 340 miles (548 km) below the volcanic belt, which matches the slab depth of porphyritic deposits formation belts in the Andes and Indonesia-Tonga region. Formation of porphyry copper systems is linked to the processes of metalliferous fluids intrusion at slab destruction areas near asthenosphere.

Abrasive Wear Resistance Comparative Analysis of the Metal Surfaced by Flux Cored Wires Systems Fe-C-Si-Mn-Ni-Mo-W-V and Fe-C-Si-Mn-Cr-Ni-Mo-V

2017 ◽  
Vol 906 ◽  
pp. 1-7 ◽  
Author(s):  
I.V. Osetkovskiy ◽  
N.A. Kozyrev ◽  
R.E. Kryukov
Keyword(s):  
Grain Size ◽  
Wear Resistance ◽  
Comparative Analysis ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Abrasive Wear Resistance ◽  
Metallographic Analysis ◽  
Deposited Metal ◽  
Cored Wires ◽  
Made In

In the article is shown the comparative analysis between structures of surfaced by the flux coded wire metal systems Fe-C-Si-Mn-Cr-Ni-Mo-V and Fe-C-Si-Mn-Ni-Mo-W-V. These powder wires are supposed to be used in recovering details and equipment components and machines, that works in conditions of intensive abrasive – shock wear. Manufacturing and surfacing of flux cored wires samples were made in laboratory conditions. Defined chemical composition of the surfaced metal. Deposited metal samples hardness and wear resistance were researched. In the course of deposited meta surface metallographic analysis were made following metallographic researches: defined nature and level of nonmetallic oxides impurity, type and morphology of the microstructure, grain size of surfaced samples. Estimation of the chemical composition components influence on the hardness and wear resistance were obtained.

scholarly journals Comparative Analysis of the Chemical Composition, Antimicrobial and Antioxidant Activity of Essential Oils of Spices Used in the Food Industry in Brazil

2020 ◽  
Author(s):  
Amanda Mara Teles ◽  
Adenilde Nascimento Mouchreck ◽  
Gustavo Oliveira Everton ◽  
Ana Lucia Abreu-Silva ◽  
Kátia da Silva Calabrese ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Comparative Analysis ◽  
Chemical Composition ◽  
Essential Oils ◽  
Food Industry ◽  
Antimicrobial And Antioxidant Activity

scholarly journals Comparative analysis of chemical composition of Miscanthus var. Soranovskii

2018 ◽  
Vol 11 ◽  
pp. 00017
Author(s):  
Yulia A. Gismatulina ◽  
Vera V. Budaeva
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Aboveground Biomass ◽  
High Potential ◽  
Industrial Scale ◽  
Special Importance ◽  
Cellulose Content ◽  
Bioethanol Production ◽  
Alternative Sources ◽  
High Cellulose

The search for alternative sources of cellulose is currently getting special importance. Miscanthus holds promise as a cellulosic feedstock with a high potential for industrial-scale cultivation. The present study reports an analysis done for seven years of the chemical composition of the aboveground biomass of Miscanthus var. Soranovskii as a source for producing bioethanol. The aboveground biomass of Miscanthus was found to have a high cellulose content (about 50%), irrespective of the age, and it is therefore reasonable to utilize this cultivar for bioethanol production.

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