scholarly journals Mineralogy and Geochemistry of Fluvial-Lacustrine Pisolith Micronodules from the Roztoka Odrzańska, Odra River, NW Poland

Geosciences ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 3 ◽  
Author(s):  
Łukasz Maciąg ◽  
Urszula Rydzewska ◽  
Artur Skowronek ◽  
Sylwester Salwa
Keyword(s):  
Significant Contribution ◽  
Manganese Content ◽  
River Mouth ◽  
Geochemical Data ◽  
Iron Hydroxides ◽  
Szczecin Lagoon ◽  
Different Types ◽  
Odra River ◽  
Moderate Climate ◽  
Nw Poland

Small-sized ferruginous micronodules or pisolith nodules, frequently occurring in inland freshwater systems in moderate climate zones, are important indicators of groundwater level changes and early diagenetic processes, especially within the Pleistocene post-glacial sedimentary systems, including swamps, peatbogs, rivers, or lakes. Compared to the other geochemical environments, pisolith nodules are usually dominated by iron hydroxides and oxides. In most cases, described micronodules indicate high phosphatization, significant contribution of allogenic detrital components, and low manganese content. The major aim of the article is to present textural, geochemical, and mineralogical variability of pisolith nodules recovered from the Roztoka Odrzańska, Odra river mouth area, NW Poland. We describe genetical relations between different types of pisoliths and try to interpret the possible formation phenomena. Analyzed loose ferruginous micronodules were separated from the lacustrine silty-clayey sapropel muds and gyttja, later analyzed using optical microscopy, SEM-energy dispersive x-ray (EDX), and XRD methods. As a reference material, we use archival iron bog ores and geochemical data of different types of nodules. Additionally, we describe previously unknown siderite-rich nodules found in neighboring sites of the Dąbie Lake and the Szczecin Lagoon.

scholarly journals Storm-Surge Induced Water Level Changes in the Odra River Mouth Area (Southern Baltic Coast)

Atmosphere ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1559
Author(s):  
Halina Kowalewska-Kalkowska
Keyword(s):  
Water Level ◽  
Storm Surge ◽  
River Mouth ◽  
Storm Surges ◽  
Mouth Area ◽  
Water Levels ◽  
Szczecin Lagoon ◽  
Sea Levels ◽  
River Mouth Area ◽  
Odra River

The Odra River mouth area is a region of the Southern Baltic coastal zone especially prone to the influence of storm surges. In the present study, the height and extent of the Baltic storm surges, and temporal offsets of the respective maximum water level occurrences in the Odra River mouth area were explored using cross-correlation, cluster analysis and principal component analysis. The analyses were based on hourly water level readings retrieved from water gauging stations located along the lower Odra reaches and at the coasts of the Szczecin Lagoon and the Pomeranian Bay during storm surge years 2008/2009–2019/2020. The analysis of mutual relationships between water levels during storm surges indicated that the extent of marine influence on the lower Odra River and within the Szczecin Lagoon was variable during the studied surge events, and dependent on meteorological conditions (the strongest during the sustained occurrence of wind blowing from the northern sector), discharge from the Odra River catchment (the strongest at low discharge), ice conditions on the lower Odra (suppressing the storm surge propagation upstream), and general sea level in the Pomeranian Bay (stronger at high sea levels). The strongest correlation between sea levels at Świnoujście and water levels in the Szczecin Lagoon and the lower Odra was found at a 6–7 h offset. The extent of storm surges usually reached 100 km up the lower Odra channels, less frequently reaching 130 km away from the sea.

United and Uniting Churches

2017 ◽  
Author(s):  
James Haire
Keyword(s):  
Nineteenth Century ◽  
Significant Contribution ◽  
New Delhi ◽  
World Council Of Churches ◽  
Ecumenical Movement ◽  
The Third ◽  
The World ◽  
Different Types ◽  
World Council ◽  
History Of

United and uniting churches have made a very significant contribution to the ecumenical movement. In seeking to assess that contribution, the chapter first defines what these churches are, considers the different types of union that have been created, examines the characteristics of these churches, and looks at the theological rationale for them. It goes on to trace the history of their formation from the beginning of the nineteenth century, and particularly during the years leading up to and following the Third Assembly of the World Council of Churches at New Delhi in 1961, under the influence of Lesslie Newbigin. Giving a theological assessment, it emphasizes that the existence of these churches, despite difficulties, provides places where the final unity of Christ’s one body is most clearly foreshadowed. They will always present proleptic visions of that goal.

Dependence of Silicon and Manganese Content in the Weld Metal on the Welding Current and Method of Gas Shielding

2015 ◽  
Vol 756 ◽  
pp. 92-96 ◽  
Author(s):  
Dmitry A. Chinakhov
Keyword(s):  
Chemical Composition ◽  
Weld Metal ◽  
Gas Dynamics ◽  
Gas Flow ◽  
Manganese Content ◽  
Welding Current ◽  
Mag Welding ◽  
Different Types ◽  
Considerable Impact ◽  
Electrode Metal

The influence of the welding current and method of gas shielding in MAG welding on the content of silicon and manganese is considered. Results of study of the welded specimens of steels 45 and 30HGSA when applying welding wire of different formulas and different types of gas shielding (traditional shielding and two-jet shielding) are given. It is established that in MAG welding the value of the welding current and the speed of the gas flow from the welding nozzle have a considerable impact on the chemical composition of the weld metal. The consumable electrode welding under double-jet gas shielding provides the directed gas-dynamics in the welding area and enables controlling the electrode metal transfer and the chemical composition of a weld.

Why should the Odra River mouth area not be regarded as an estuary? A geologist's point of view

2007 ◽  
Vol 36 (2) ◽  
Author(s):  
Andrzej Osadczuk ◽  
Stanisław Musielak ◽  
Ryszard Borówka
Keyword(s):  
Coastal Lagoons ◽  
River Mouth ◽  
Mouth Area ◽  
Point Of View ◽  
River Mouth Area ◽  
Open Sea ◽  
Odra River ◽  
Flow Through ◽  
The Baltic ◽  
Shallow Water Body

Why should the Odra River mouth area not be regarded as an estuary? A geologist's point of viewThe authors find no arguments that would justify application of the term "estuary" to the area of the Odra River discharge into the Baltic Sea. The physiography, geology, and hydrology of the Odra river mouth show that the area possesses many more characteristics typical of flow-through coastal lagoons than those of estuaries. Of key importance in this respect is the Szczecin Lagoon, an extensive, shallow water body separated from the open sea by a barrier intersected by three narrow and long straits. The lagoonal nature of the area is demonstrated also by its geological history.

Late Glacial and Holocene depositional history in the eastern part of the Szczecin Lagoon (Great Lagoon) basin—NW Poland

2005 ◽  
Vol 130 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Ryszard K. Borówka ◽  
Andrzej Osadczuk ◽  
Andrzej Witkowski ◽  
Brygida Wawrzyniak-Wydrowska ◽  
Tomasz Duda
Keyword(s):  
Late Glacial ◽  
Depositional History ◽  
Szczecin Lagoon ◽  
Late Glacial And Holocene ◽  
Nw Poland

Major Controls on the Evolution of the Cambrian Dolomite Reservoirs in the Keping Area, Tarim Basin

2013 ◽  
Vol 734-737 ◽  
pp. 377-383
Author(s):  
Qing Li ◽  
Xue Lian You ◽  
Wen Xuan Hu ◽  
Jing Quan Zhu ◽  
Zai Xing Jiang
Keyword(s):  
Tarim Basin ◽  
Significant Contribution ◽  
Oil And Gas ◽  
Geochemical Data ◽  
Acid Dissolution ◽  
High Quality ◽  
Secondary Porosity ◽  
Oil And Gas Exploration ◽  
Reservoir Evolution ◽  
Major Factors

The Cambrian dolomite reservoir is an important target in oil and gas exploration. The Penglaiba section in the Keping area is typically examined in studies dealing with the Cambrian dolomite reservoirs of northwestern Tarim Basin. Based on sedimentological, petrographic, and geochemical data, lithofacies and fluids are identified as the major factors that control the dolomite reservoir in the study area. Lithoacies are fundamental to reservoir evolution because they provide suitable channels for dolomitization and dissolution of fluids that, in turn, facilitate the formation of high quality reservoirs. The lithofacies which could form high-quality reservoirs in the study area are: slope slip (collapse) facies, gypsum related facies, and algae dolomite facies. The sources of fluids include seawater, meteoric freshwater, diagenetic/hydrocarbon fluid, and hydrothermal fluid. These fluids lead to dolomitization, penecontemporaneous meteoric dissolution, hypergene dissolution, organic acid dissolution and hydrothermal dissolution that result in secondary porosity, and as such, they have a significant contribution to reservoir evolution.

scholarly journals Protein structure from the essential amino acids to the 3D structure

2019 ◽  
Vol 9 (1) ◽  
Keyword(s):  
Amino Acids ◽  
Protein Structure ◽  
Significant Contribution ◽  
Polypeptide Chain ◽  
Protein Structures ◽  
3D Structure ◽  
Building Blocks ◽  
Essential Amino Acids ◽  
Different Types ◽  
Quaternary Structures

Protein structure is a hot topic, not only to the specialist, but with others like the physicists. So this review is targeting those who are not biologists and have to deal with the protein in their research. In this review we travel with the protein structures from the amino acids and its classifications, and how the polypeptide chain is formed from these building blocks up to the final 3D structure. We introduced the secondary structure species like helices with its different types and how it is formed; also the beta sheet formation and types are explained briefly. Finally the tertiary and quaternary structures are presented. The approaches of molecular modeling as well as other important computational methods present significant contribution to studying proteins.

Experimental investigation into the lateral resistance of Y-shape steel sleepers on ballasted tracks

2020 ◽  
pp. 095440972097259
Author(s):  
Jabbar Ali Zakeri ◽  
Yaser Bahari ◽  
Kaveh Yousefian
Keyword(s):  
Significant Contribution ◽  
Railway Track ◽  
Structural Behavior ◽  
Resistance Force ◽  
Loading Test ◽  
Conventional Concrete ◽  
Loading Direction ◽  
Lateral Resistance ◽  
Different Types ◽  
Longitudinal Resistance

Track lateral resistance ensures the track stability under operation and during its service life in lateral and longitudinal directions. Numerous methods and techniques have been considered to enhance track lateral resistance. Since sleeper, as one of the railway track superstructure components, has a significant contribution in providing the lateral resistance, using different types of sleepers, like Y-shape one, would alter the track lateral resistance. The utilization of Y-shape steel sleepers in railway tracks needs further investigation to comprehend the structural behavior. Hence, in this paper, the lateral resistance of the Y-shape steel sleeper was experimentally investigated by performing the lateral track panel loading test (LTPT) and single tie push test (STPT). The longitudinal resistance force (LRF) in STPT depends on the loading direction. The LRF was specified as 16 kN in Y-top direction and 13 kN in Y-bottom direction for a single sleeper. The LRF in STPT was enhanced by 90% on average compared to the conventional concrete sleeper. The LRF in LTPT was also obtained as 18 kN, and its increasing percentage was measured as 12.5%.

Water level fluctuations in the Odra River mouth area in relation to passages of deep low-pressure systems

2007 ◽  
Vol 36 (1) ◽  
Author(s):  
Bernard Wiśniewski ◽  
Halina Kowalewska-Kalkowska
Keyword(s):  
Sea Level ◽  
Atmospheric Pressure ◽  
River Mouth ◽  
Storm Surges ◽  
Low Pressure ◽  
Mouth Area ◽  
Water Level Fluctuations ◽  
River Mouth Area ◽  
Odra River ◽  
Low Pressure Systems

Water level fluctuations in the Odra River mouth area in relation to passages of deep low-pressure systemsThe Odra River mouth area is affected by storm surges caused by passages of deep low-pressure systems over the Baltic Sea. The surges are the result of wind action and changes in atmospheric pressure at the sea surface. The two effects may be additive, in which both factors increase or decrease the sea level on the coast, or they may be non-additive, where one factor increases the sea level and the other decreases it. This paper discusses the role of the wind field and changes in atmospheric pressure in the duration and extent of storm surges in the Odra River mouth area.

Corruption and anti-corruption in China: a case study of high-ranking officials

2020 ◽  
Vol 27 (3) ◽  
pp. 715-734
Author(s):  
Jiahong He
Keyword(s):  
Significant Contribution ◽  
Complex Issue ◽  
Content Type ◽  
The Rule Of Law ◽  
High Ranking ◽  
Social Transitions ◽  
The Social ◽  
Different Types ◽  
Underlying Causes

Purpose With the analysis of the causes of corruption, this study aims to investigate specific anti-corruption measures that can be implemented to reform the political system and the social climate of China. Design/methodology/approach This study examines 97 severe corruption cases of high-ranking officials in China, which occurred between 2012 and 2015. As this insinuates that both institutional and social corruption are major problems in China, the analysis delves into multiple facts of corruption, including different types, four primary underlying causes, and suggestions regarding the implementation of three significant governmental shifts that focus on investigation, prevention tactics and legal regulations. Findings China’s corruption is not only individual-based but also it has developed into institutional corruption and social corruption. Besides human nature and instinct, the causes of corruption can be organised into four categories, namely, social customs, social transitions, institutional designs and institutional operations. For the removed high-ranking officials, the formation of interest chains was an important underlying cause behind their corruption. Originality/value This study makes a significant contribution to the literature because this study provides a well-rounded approach to a complex issue by highlighting the significance of democracy and the rule of law as ways to regulate human behaviour to combat future corruption.

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