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881
Evaluation of Heavy Metals in Stream Sediments from Abakaliki Pb – Zn Ore Mining Areas of Ebonyi State, Nigeria
Published 2018-06-01“…The variations for the heavy metals suggest that mining operation is responsible for the distribution and redistribution of chemical elements. The values of contamination factor for the stream sediment indicate moderate contamination for Cd, As and Ni while Fe, Zn, Pb, Cu and Cr show very high contamination. …”
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882
Curing Mechanisms of Polymeric Nano-Copolymer Subgrade
Published 2023-06-01“…Through the comparative analysis of elements in plain soil and solidified soil, it was found that no new chemical elements were produced in the solidified soil, indicating that the curing agent does not have negative impacts on the environment.…”
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883
The Chemical Properties of Pond Sediments and the Operations of River Restoration.
Published 2019-03-01“…Sediments “can be dressed” with chemical elements of various kinds, including pollutants that settle on the bottom of the ponds. …”
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884
Reviews and impact of chemicals on water quality obtained in khorramabad city,using standards(National, World Health Organization and Epa)
Published 2016-05-01“…Information and data on the chemical elements present in the water parameters: ph., total hardness (TH), electrical conductivity (EC), Total Dissolved Solids (TDS), sulfate (SO4), chlorine (Cl), nitrite (NO2) and nitrate (NO3). . …”
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885
Quantification of sulfur distribution on rubber surfaces by means of μ-X-ray fluorescence analysis
Published 2023-11-01“…With the help of this method, it is possible to scan surfaces of several cm2 and to show the distribution of different chemical elements. Its measuring principle has been known for decades but has hardly been used in the rubber industry so far.The main reason for this is that its quantification process for polymeric samples is more complex than for geologic or metallic samples, which are typically been investigated with μ-XRF to date. …”
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886
Methodology for selecting the type of battery for operation of electric vehicles in cold regions
Published 2023-02-01“…The direction of further research is the refinement of models, the study of the low-temperature properties of new and promising types of chemical elements of high-voltage batteries.…”
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887
Modeling Changes in the Composition of River Water with Discharged Wastewater: A Case Study in NW Russia
Published 2022-01-01“…According to the calculations, when about 5000 m<sup>3</sup>/h of drainage water is discharge d into the river, the mass of precipitated chemical elements will be 56–191 t/h, including up to 2.1 t/h of iron; therefore, accumulation in the discharge zone must be controlled.…”
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888
Using the method of principal components in study of the data obtained by means of X-ray fluorescent spectral analysis on the elemental composition of clothing damages areas at the...
Published 2019-01-01“…Analysis and processing of the qualitative and quantitative composition of chemical elements in the damage areas was carried out using the chemometric approach – the method of main components. …”
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889
ANTIMICROBIAL AND STRUCTURAL EFFECTS OF DIFFERENT IRRIGATION SOLUTIONS ON GUTTA-PERCHA CONES
Published 2015-01-01“…About 92 new GPCs were analyzed by means of SEM/EDS to assess the topography and chemical elements present on their surface. The data generated was analyzed using Pearson chi-square test, p<0.05. …”
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890
Multispectral Imaging and <i>p</i>-XRF for the Non-Invasive Characterization of the Anonymous Devotional Painting ‘<i>Maria Santissima delle Grazie</i>’ from Mirabella Imbáccari (S...
Published 2021-09-01“…XRF spectrometry analysis is performed for the identification of the chemical elements constituting the pigments (inorganic chromophores). …”
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891
Some Notes on Dense Structures Present in Archaeological Plant Remains: X-ray Fluorescence Computed Tomography Applications
Published 2022-09-01“…Results show that some of the chemical elements present in solid bodies and anatomical structures of the plant remains refer to the sedimentary environment, while others have an endogenous origin. …”
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892
Changes in chemical composition of acid extracts on depth of peat deposit of the Vasyugan mire ecological systems (Western Siberia)
Published 2018-10-01“…Сoncentration of 73 chemical elements was determined and three groups of elements were allocated: 1) with rather steady increase from a surface to bottom soils and/or a strongly pronounced maximum in bottom soils; 2) with well expressed maxima in the top and bottom parts of peat deposits; 3) with other types of distribution. …”
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893
FEATURES OF ELEMENTAL COMPOSITION IN SCHOOLCHILD WITH ASCARIASIS
Published 2018-04-01“…It was determined of 19 chemical elements (Ca, Zn, K, I, Cu, Se, Fe, Mn, Cr, S, Br, Cl, Co, Ni, Mo, Sr, Ba, Pb, Cd) in children's hair was determined.Results: Low content of Zn, Cu, I, Se, Fe and Se, Br, Co, Ni, as well as increase of toxic Pb and Cd in the hair of junior schoolchildren with ascariasis is established. …”
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894
Contrasts among cationic phytochemical landscapes in the southern United States
Published 2022-10-01“…Abstract Understanding the phytochemical landscapes of essential and nonessential chemical elements to plants provides an opportunity to better link biogeochemical cycles to trophic ecology. …”
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895
Barium, Lithium and Titanium Content in Herbs of Mid-Field Wet Depressions in East-Central Poland
Published 2022-03-01“…Of the six herb species, <i>Mentha arvensis</i> L. was with the greatest accumulation potential of the chemical elements. However, no excessive Ba, Li and Ti content was found in herbs growing at different distances from arable fields, permanent grassland and shrubby vegetation. …”
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896
Prerequisite to applying transmission electron microscope as a geochemical method for detecting migration forms of minerals over hydrocarbon deposits
Published 2017-09-01“…The paper introduces a new prospecting and exploration geochemical and magnetic technique which can help identify nanoscale mineral forms of chemical elements with a transmission electron microscope, in particular find and identify migration metal compounds.…”
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897
Structural‐functional unit ordering for high‐performance electron‐correlated materials
Published 2023-01-01“…In this review, a new method for material research and design (R&D), named structural‐functional unit ordering (SFU ordering), which is presented, overcomes the shortcomings—for example, the limitation of finite chemical elements and long R&D circle‐of conventional strategy and thus provides guidance for the design of these high‐performance functional materials on demand. …”
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898
Prerequisite to applying transmission electron microscope as a geochemical method for detecting migration forms of minerals over hydrocarbon deposits
Published 2017-09-01“…The paper introduces a new prospecting and exploration geochemical and magnetic technique which can help identify nanoscale mineral forms of chemical elements with a transmission electron microscope, in particular find and identify migration metal compounds.…”
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899
Hydrochemical Characteristics and Formation Mechanism of Strontium-Rich Groundwater in Tianjiazhai, Fugu, China
Published 2022-06-01“…Sr-rich groundwater has relatively stable contents of chemical elements. The water–rock interaction was the main factor controlling the hydrochemical characteristics of Sr-rich groundwater, particularly carbonate dissolution, influenced by some degree of cation exchange. …”
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900
Trace element composition of organs and tissues of the Caspian seal (<i>Phoca caspica</i> Gmelin, 1788) in the conditions of technogenesis of the biosphere
Published 2022-04-01“…With age, the Caspian seal has a significant increase in the concentration of zinc, copper, mercury and cadmium, and the digestibility of manganese, chromium, cobalt and lead decreases.Conclusion. Chemical elements are distributed unevenly in the body of a seal, depending on the properties of metals and the functional features of organs. …”
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