Elemental composition of biogenic sediments reveals palaeoclimatic changes during the Late Weichselian in a Central European river valley: A statistical approach

CATENA ◽  
2021 ◽  
Vol 200 ◽  
pp. 105188
Author(s):  
Daniel Okupny ◽  
Dominik Pawłowski
Keyword(s):  
Elemental Composition ◽  
Statistical Approach ◽  
River Valley ◽  
Central European ◽  
Late Weichselian

A Statistical Approach to Mapping Flood Susceptibility in the Lower Connecticut River Valley Region

2018 ◽  
Vol 54 (10) ◽  
pp. 7603-7618 ◽  
Author(s):  
Jason Giovannettone ◽  
Tom Copenhaver ◽  
Margot Burns ◽  
Scott Choquette
Keyword(s):  
Statistical Approach ◽  
River Valley ◽  
Connecticut River ◽  
Flood Susceptibility ◽  
Connecticut River Valley

Environmental influence on forest development and decline in the Warta River valley (Central Poland) during the Late Weichselian

2014 ◽  
Vol 324 ◽  
pp. 99-114 ◽  
Author(s):  
Danuta A. Dzieduszyńska ◽  
Piotr Kittel ◽  
Joanna Petera-Zganiacz ◽  
Stephen J. Brooks ◽  
Katarzyna Korzeń ◽  
...  
Keyword(s):  
Environmental Influence ◽  
River Valley ◽  
Forest Development ◽  
Central Poland ◽  
Late Weichselian

Late Weichselian and Holocene record of the paleoenvironmental changes in a small river valley in Central Poland

2016 ◽  
Vol 135 ◽  
pp. 24-40 ◽  
Author(s):  
Dominik Pawłowski ◽  
Ryszard K. Borówka ◽  
Grzegorz A. Kowalewski ◽  
Tomi P. Luoto ◽  
Krystyna Milecka ◽  
...  
Keyword(s):  
River Valley ◽  
Small River ◽  
Paleoenvironmental Changes ◽  
Central Poland ◽  
Holocene Record ◽  
Late Weichselian

scholarly journals GROUNDWATER QUALITY ASSESSMENT OF THE VALERIC RIVER VALLEY IN THE ACHKHOY-MARTAN DISTRICT OF THE CHECHEN REPUBLIC

2020 ◽  
Vol 21 (3) ◽  
pp. 50-59
Author(s):  
Z.A. Amagova ◽  
Keyword(s):  
Elemental Composition ◽  
Chemical Elements ◽  
Fluorine Content ◽  
River Valley ◽  
Domestic Water ◽  
Mountain Areas ◽  
Coefficients Of Variations ◽  
Low Levels ◽  
The Republic ◽  
Domestic Water Supply

The main sources of drinking and domestic water supply in the Chechen Republic are groundwater. The scares information on the intensity of pollution and the elemental composition of groundwater in the republic, as well as the heterogeneity of the distribution of chemical elements, largely associated with the presence of mountain areas, determines the necessity of detailed investigations. Water chemical and elemental composition of springs situated in the Valeric river valley at the Valeric settlement territory, Achkhoy-Martan district of the Chechen republic, is studied. All water samples were alkaline (pH 8.12–8.77), with relatively low levels of hardness (2.1–3.0 mg-eq/dm3) and mineralization (213–441 mg/dm3) and low fluorine content (0.28–0.36 mg/dm3). Among the studied indicators, risk factors are an increased content of nitrates (indicated concentration range reached 0.67–1.33 MPC). Water of springs situated at the river downstream contained significantly higher concentrations of all elements investigated. The highest coefficients of variations were revealed for B (84.6%), Cu (85.8%), Se (103%), and also As (86.5%) and Cd (96.7%). Three springs with elevated levels of B (730 µg/dm3), Li (210 µg/dm3) and Se (1.0-4.2 µg/dm3) were revealed, This suggests high prospects of bottling the water of these springs for utilization in preventive purposes as a table natural mineral water, intended for increasing immunity, preventing osteoporosis and in neurological practice.

Integration of Archaeological Phase Information and Radiocarbon Results from the Jama River Valley, Ecuador: A Bayesian Approach

1998 ◽  
Vol 9 (2) ◽  
pp. 160-179 ◽  
Author(s):  
James A. Zeidler ◽  
Caitlin E. Buck ◽  
Clifford D. Litton
Keyword(s):  
Bayesian Approach ◽  
Historical Development ◽  
Statistical Approach ◽  
River Valley ◽  
Archaeological Sites ◽  
Cultural Tradition ◽  
Phase Information ◽  
Calendar Dates ◽  
Specific Sequences ◽  
Radiocarbon Calibration

Archaeological syntheses of western Ecuadorian prehistory have been hampered by a lack of reliable absolute chronologies and detailed cultural sequences for many key areas, one of which is northern Manabí Province, known principally as the territory of the Jama-Coaque cultural tradition. This study presents a seven-phase cultural sequence for the Jama River valley of northern Manabí that spans over 3,600 calendar years. A statistical model relating the successive archaeological phases is established, based on prior knowledge of the stratigraphy and ceramic seriation from key archaeological sites throughout the valley. A Bayesian statistical approach is then employed to calibrate 37 radiocarbon determinations for the purpose of estimating calendar dates for the limits of these phases. Apart from its contribution to the prehistory of a poorly studied area, the analysis illustrates the value of a probabilistic Bayesian approach to radiocarbon calibration, especially when the determinations relate to archaeologically predefined phases. It also demonstrates the dangers of uncritically applying generalized periodization schemes to specific sequences of historical development and highlights the need for reassessing Ecuadorian chronology through more precise interregional correlations.

The response of flood-plain ecosystems to the Late Glacial and Early Holocene hydrological changes: A case study from a small Central European river valley

CATENA ◽  
2016 ◽  
Vol 147 ◽  
pp. 411-428 ◽  
Author(s):  
Dominik Pawłowski ◽  
Ryszard K. Borówka ◽  
Grzegorz Kowalewski ◽  
Tomi P. Luoto ◽  
Krystyna Milecka ◽  
...  
Keyword(s):  
Late Glacial ◽  
Flood Plain ◽  
River Valley ◽  
Early Holocene ◽  
Central European ◽  
Hydrological Changes

Alterations of ultrastructure and elemental composition in cultured human epidermal keratinocytes after treatment with nitrofurazone and silver sulfadiazine

1987 ◽  
Vol 45 ◽  
pp. 676-677
Author(s):  
A. R. Crooker ◽  
M. C. Myers ◽  
T. L. Beard ◽  
E. S. Graham
Keyword(s):  
Electron Microscopy ◽  
Elemental Composition ◽  
Pyrolytic Carbon ◽  
Human Keratinocytes ◽  
Silver Sulfadiazine ◽  
Epidermal Keratinocytes ◽  
Human Epidermal Keratinocytes ◽  
Culture Systems ◽  
Cytotoxicity Endpoints

Cell culture systems have become increasingly popular as a means of screening toxic agents and studying toxic mechanisms of drugs and other chemicals at the cellular and subcellular levels. These in vitro tests can be conducted rapidly in a broad range of relevant mammalian culture systems; a variety of biological and biochemical cytotoxicity endpoints can be examined. The following study utilized human keratinocytes to evaluate the relative cytotoxicities of nitrofurazone (NF) and silver sulfadiazine (SS), the active ingredients of FURACIN(R) Topical Cream and SILVADENE(R) Cream, respectively. These compounds are anti-infectives used in the treatment of burn patients. Cell ultrastructure and elemental composition were utilized as cytotoxicity endpoints.Normal Human Epidermal Keratinocytes (HK) were prepared from the EpiPackTM culture system (Clonetics Corporation, Boulder, CO). For scanning electron microscopy (SEM) and transmission electron microscopy (TEM), cells were seeded on sterile 35 mm Falcon plastic dishes; for elemental microanalysis, cells were plated on polished pyrolytic carbon discs (E. Fullam, Latham, NY) placed in the culture dishes.

Electron probe x-ray microanalysis and electron microscopy of amino acid absorption and transport by the small intestine: inhibition by chemical poisons and correlation to the elemental composition of the epithelial cells

1986 ◽  
Vol 44 ◽  
pp. 134-135
Author(s):  
A. J. Tousimis
Keyword(s):  
Small Intestine ◽  
Amino Acid ◽  
Epithelial Cells ◽  
Elemental Composition ◽  
Isotope Labeling ◽  
Structural Components ◽  
X Ray ◽  
Human Small Intestine ◽  
Transport Studies

The elemental composition of amino acids is similar to that of the major structural components of the epithelial cells of the small intestine and other tissues. Therefore, their subcellular localization and concentration measurements are not possible by x-ray microanalysis. Radioactive isotope labeling: I131-tyrosine, Se75-methionine and S35-methionine have been successfully employed in numerous absorption and transport studies. The latter two have been utilized both in vitro and vivo, with similar results in the hamster and human small intestine. Non-radioactive Selenomethionine, since its absorption/transport behavior is assumed to be the same as that of Se75- methionine and S75-methionine could serve as a compound tracer for this amino acid.

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