scholarly journals Geochemical characteristics of the Toplika manganese- and iron-bearing ore occurrence, central part of the Srednogorie Zone, Bulgaria: Preliminary results

2021 ◽  
Vol 82 (3) ◽  
pp. 43-45
Author(s):  
Silvia Chavdarova ◽  
Milen Stavrev ◽  
Atanas Hikov ◽  
Georgi Granchovski ◽  
Stoyan Georgiev ◽  
...  
Keyword(s):  
Preliminary Data ◽  
Mineral Resources ◽  
Geochemical Characteristics ◽  
Preliminary Results ◽  
Metalliferous Sediments ◽  
Critical Elements ◽  
Potential Source ◽  
Hydrothermal Origin ◽  
Iron Bearing

The growing demand on mineral resources stimulated our interest on manganese- and iron-bearing occurrences as a potential source of Mn, Cu, Ni, Co, Mo, REY, etc. Here we focus on the mineralization of the Toplika ore occurrence, which is located in the central part of the Srednogorie Zone, Bulgaria. We present preliminary data on its field relationships, mineralogy and geochemistry and discuss the possible hydrothermal origin of the metalliferous sediments that should be further studies as source of critical elements.

Preliminary data of hereditary constitutional studies in endemic goiter in the Mariob region

1930 ◽  
Vol 26 (3) ◽  
pp. 290-299
Author(s):  
M. P. Andreev ◽  
M. G. Ul'yanova
Keyword(s):  
Preliminary Data ◽  
Endemic Goiter ◽  
Journal Article ◽  
Medical Community ◽  
Preliminary Results ◽  
Enormous Amount ◽  
The Future

In the summer of 1928 and 1929, we had to work on an expedition to study the endemic goiter in the Mariob region. It is impossible to cover in a journal article the enormous amount of material that these expeditions brought (mainly in 1929), its processing is still ongoing and the publication of data in special works of the expedition is a matter of the future; but already at the present time it is possible to share some preliminary results that are of interest to a wide medical community.

scholarly journals Analysis of Content of Selected Critical Elements in Fly Ash

2016 ◽  
Vol 62 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Dorota Makowska ◽  
Faustyna Wierońska
Keyword(s):  
Fly Ash ◽  
Coal Combustion ◽  
Power Plants ◽  
Raw Materials ◽  
Coal Fly Ash ◽  
New Mineral ◽  
The European Union ◽  
Cobalt Chromium ◽  
Critical Elements ◽  
Potential Source

AbstractPursuant to the new mineral policy of the European Union, searching for new sources of raw materials is required. Coal fly ash has long been considered as a potential source of a number of critical elements. Therefore, it is important to monitor the contents of the critical elements in fly ash from coal combustion. The paper presents the results of examinations of the contents of selected elements, i.e. beryllium, cobalt, chromium and germanium in fly ash from Polish power plants. The results of the conducted investigations indicate that the examined ash samples from bituminous coal combustion cannot be treated as a potential source of the analysed critical elements. The content of these elements in ash, though slightly higher than their average content in the sedimentary rocks, is, however, not high enough to make their recovery technologically and economically justified at this moment.

scholarly journals Mini Review Immunological Consequences of Immunization With COVID-19 mRNA Vaccines: Preliminary Results

2021 ◽  
Vol 12 ◽  
Author(s):  
Andrea Lombardi ◽  
Giorgio Bozzi ◽  
Riccardo Ungaro ◽  
Simone Villa ◽  
Valeria Castelli ◽  
...  
Keyword(s):  
Preliminary Data ◽  
Vaccine Efficacy ◽  
Neutralizing Antibodies ◽  
Cellular Response ◽  
Safety And Efficacy ◽  
Specific Antibodies ◽  
Preliminary Results ◽  
Efficacy Profile

Background: BNT162b2 and mRNA-1273 are the two recently approved mRNA-based vaccines against COVID-19 which has shown excellent safety and efficacy. Preliminary data about specific and neutralizing antibodies is available covering the first 100 days after vaccination.Methods: We reviewed all the publications regarding the immunologic consequences of BNT162b2 and mRNA-1273 vaccination. A summary of specific antibodies concentration and neutralizing antibodies titers elicited by each vaccine is provided.Results: BNT162b2 and mRNA-1273 displayed a reassuring safety and efficacy profile, with the latter above 94%. They can elicit specific antibodies titers and neutralizing antibodies concentrations that are far superior from those observed among COVID-19 human convalescent serum, across a wide span of age, for at least 100 days after vaccination. Moreover, the vaccine-induced T cellular response is oriented toward a TH1 response and no evidence of vaccine-enhanced disease have been reported.Discussion: BNT162b2 and mRNA-1273 can elicit specific antibodies titers and neutralizing antibodies concentrations above those observed among COVID-19 human convalescent serum in the first 100 days after vaccination. Data about vaccine efficacy in those with previous COVID-19 or immunocompromised is still limited.

scholarly journals Mineralogical and Geochemical Characteristics of Lithium and Rare Earth Elements in High-Sulfur Coal from the Donggou Mine, Chongqing, Southwestern China

Minerals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 627
Author(s):  
Jianhua Zou ◽  
Longfei Cheng ◽  
Yuanchen Guo ◽  
Zhengcheng Wang ◽  
Heming Tian ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Raw Materials ◽  
Geochemical Characteristics ◽  
Critical Elements ◽  
Geological Factors ◽  
Potential Alternative ◽  
Geological Factor ◽  
Alternative Sources ◽  
Coal Measures

Coal and coal by-products are considered as the potential raw materials for critical elements (e.g., rare earth elements, Li, Ga, Ge, etc.), which have attracted much attention in recent years. The purpose of this study is to investigate the mineralogical and geochemical characteristics, and controlling geological factors of lithium and rare earth elements in the Lopingian (Wujiaping Formation) coal from the Donggou Mine, southeastern Chongqing Coalfield, China. Results indicate that lithium and rare earth elements are significantly enriched in the Donggou coals, which could be new potential alternative sources for critical elements. Concentrations of lithium and rare earth elements in the Donggou coals gradually increase from top to bottom. Lithium is mainly associated with kaolinite, while rhabdophane, florencite, goyazite, and xenotime are the main hosts of rare earth elements. The controlling geological factor is the groundwater leaching of underlying tuff, and to a lesser extent, the terrigenous clastic materials input from the top layer of the Kangdian Upland. This study provides mineralization information for lithium and rare earth elements exploration in coal measures.

Preliminary data on dinocysts of the upper toarcian – lower aalenian of Northeastern Siberia

2020 ◽  
Author(s):  
Anna A. Goryacheva ◽  
Keyword(s):  
Preliminary Data ◽  
Middle Jurassic ◽  
Preliminary Results ◽  
Unicellular Algae ◽  
Natural Exposure ◽  
Northeastern Siberia

The article presents preliminary results of palynological studies of the Lower-Middle Jurassic deposits, uncovered by the natural exposure of 7A on the Kelimyar river and represented by the Kelimyar Formation. The Toarian biostraton with Valvaeodinium aquilonium is identified in the section. As a result of studies in the Lower Aalenian samples, only rare dinocysts taxa were identified that did not allow to divide the upper part of the section on this group of unicellular algae.

scholarly journals Identification of iron-bearing minerals in basalts and pillow lavas of the Kaczawa Mountains using 57Fe Mössbauer spectroscopy

Nukleonika ◽  
2017 ◽  
Vol 62 (2) ◽  
pp. 145-148
Author(s):  
Dariusz Malczewski ◽  
Martyna Jeleń ◽  
Jerzy Żaba ◽  
Artur Błachowski ◽  
Krzysztof Ruebenbauer ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
57Fe Mössbauer Spectroscopy ◽  
Preliminary Results ◽  
57Fe Mossbauer Spectroscopy ◽  
Mößbauer Spectroscopy ◽  
Pillow Lavas ◽  
Geological Unit ◽  
Sw Poland ◽  
Iron Bearing

Abstract The Kaczawa Mountains along with the Kaczawa foothill comprise a complicated geological unit that is called the Kaczawa metamorphic (Sudetes, SW Poland). The aim of our work was to identify the iron-bearing minerals in samples of basalts and pillow lavas from the Kaczawa metamorphic using 57Fe Mössbauer spectroscopy. Based on the preliminary results, the Fe3+/Fe2+ ratio in the samples was determined.

Study on Geochemical Characteristics of the Sb Polymetallic District in Da Zhuang of Kai Yuan County in Yunnan Province

2013 ◽  
Vol 807-809 ◽  
pp. 2184-2187
Author(s):  
Jiao Jiao Chen ◽  
Ying Shu Li ◽  
Yi Ke Zhang ◽  
Da Qing He ◽  
Dong Ming Yang
Keyword(s):  
Yunnan Province ◽  
Mineral Resources ◽  
Mining Area ◽  
Geochemical Characteristics ◽  
Geochemical Data ◽  
Geological Investigation ◽  
Ore Deposit ◽  
Structure Characteristics ◽  
Yunnan Area ◽  
Favorable Conditions

Southeast Yunnan Area is an Important Nonferrous Metals Mineral Resources Base in Yunnan Province, with Good Metallogenic Conditions. the Structure Characteristics of Kai Yuan Da Zhuang Mining Area is more Complex, with Favorable Conditions for Mineralization. Based on Detailed Geological Investigation, Combined with the Geochemical Data and Geological Setting, Deposit Features of Da Zhuang Antimony Ore Deposit and Summarizes Geochemical Characteristics, that is to Study the Genesis of this Deposit and is to Predict the Mining Ore.

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