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    Wyświetlanie 1-5 z 5
    Tytuł:
    Last two millennia water level changes of the Młynek Lake (northern Poland) inferred from diatoms and chrysophyte cysts record
    Autorzy:
    Zalat, Abdelfattah
    Welc, Fabian
    Nitychoruk, Jerzy
    Marks, Leszek
    Chodyka, Marta
    Zbucki, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2025243.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Diatoms
    chrysophyte
    environment
    water level
    climate change
    Młynek Lake
    Polska
    Opis:
    A sediment core, 350 cm long recovered from Młynek Lake, northern of Poland (Warmia and Masuria Region) was analyzed with respect to their content of diatoms and chrysophyte cysts. The aim was to reconstruct the lake water level and climatic changes during the past 2500 years. The recognized diatom assemblages displayed marked floristic changes along the sediment core samples. The main change in diatom composition consists of a shift from an assemblage dominated by benthic Fragilaria sensu lato species through marked intervals to a planktonic one in distinct zones. A high proportion of benthic to plankton taxa has been reported as indicative for a lowering of the lake level with long ice cover in a cold dry climate and a shift from benthic to planktonic diatom taxa reflects arising water level with longest growing season and reduced ice cover on the lake during a warm wet climate. Multivariate statistical analysis included hierarchical ascending clustering distinguished four diatom ecological groups. The analyzed core section was divided into 11 diatom zones according to a distribution of ecological groups and variation in abundance of dominant species supported by 14C data. The results displayed a developmental history of the Młynek Lake that can be divided into 6 main phases of alternating warm wet and cold dry shifts. A distinct dominance of planktonic eutrophic indicator diatoms accompanied by a low abundance of chrysophyte cysts indicates increased lake trophicity and a general trend for the increasing anthropogenic impact.
    Źródło:
    Studia Quaternaria; 2018, 35; 77-89
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer simulation of heating properties in wall partition with built-in elements that imitate thermal bridges
    Autorzy:
    Tokarski, Daniel
    Żukiewicz-Sobczak, Wioletta
    Chodyka, Marta
    Grudniewski, Tomasz
    Nitychoruk, Jerzy Antoni
    Tomaszewski, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/104321.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    2D modelling
    thermal permeability
    thermal flows
    point and linear thermal bridges
    modelowanie 2D
    przenikalność cieplna
    właściwości termiczne
    ściana działowa
    symulacja komputerowa
    Opis:
    The article aimed at presenting of the design assumptions of the wall partition built anda results of computer simulation of thermal properties in a heterogeneous wall partition in THERM. Display of the isotherms' distribution, heat flux vectors and temperature distribution in the area of thermal bridges and beyond. The tested partition on the basis of which simulations were created, was equipped with elements imitating thermal bridges, used in construction, to show their influence on the thermal properties of building structures. Thermal bridges can take the form of linear and point bridges. The example described in the article concerns the problem of thermal bridges occurring in wall partitions. The simulation is a preliminary pilot action before the start of non-invasive tests, ie measurement and calculation of the heat transfer coefficient, thermovision measurements on the surface of the barrier.
    Źródło:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2019, 66, 1; 37-44
    2300-5130
    2300-8903
    Pojawia się w:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer simulation of heating properties in wall partition with built-in elements that imitate thermal bridges
    Autorzy:
    Tokarski, Daniel
    Żukiewicz-Sobczak, Wioletta
    Chodyka, Marta
    Grudniewski, Tomasz
    Nitychoruk, Jerzy Antoni
    Tomaszewski, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2065742.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    2D modelling
    thermal permeability
    thermal flows
    point and linear thermal bridges
    modelowanie 2D
    przenikalność cieplna
    właściwości termiczne
    ściana działowa
    symulacja komputerowa
    Opis:
    The article aimed at presenting of the design assumptions of the wall partition built anda results of computer simulation of thermal properties in a heterogeneous wall partition in THERM. Display of the isotherms' distribution, heat flux vectors and temperature distribution in the area of thermal bridges and beyond. The tested partition on the basis of which simulations were created, was equipped with elements imitating thermal bridges, used in construction, to show their influence on the thermal properties of building structures. Thermal bridges can take the form of linear and point bridges. The example described in the article concerns the problem of thermal bridges occurring in wall partitions. The simulation is a preliminary pilot action before the start of non-invasive tests, ie measurement and calculation of the heat transfer coefficient, thermovision measurements on the surface of the barrier.
    Źródło:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2019, 66, 1; 37--44
    2300-5130
    2300-8903
    Pojawia się w:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recent and fossil freshwater diatoms of Poland: taxonomy, distribution and their significance in the environmental reconstruction Part 1 Coscinodiscophyceae, Mediophyceae and Fragilariophycidae
    Autorzy:
    Zalat, Abdelfattah A.
    Nitychoruk, Jerzy
    Chodyka, Marta
    Pidek, Irena A.
    Welc, Fabian
    Bahdasarau, Maksim
    Dziamidava, Sviatlana
    Powiązania:
    https://bibliotekanauki.pl/books/2147348.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
    Opis:
    High-resolution diatom investigation from the Polish ecosystem is presented as a contribution to our knowledge of diatom floristics, ecology, biogeography, and their significance in environmental and climate reconstruction in Poland. The study is based on the analysis of 821 sediment samples taken from different lakes in northern Poland, besides 8 borehole-originated from the Eemian paleolakes sites in central Poland. The preceding diatom results in published papers included the diatom flora that were recorded from different habitats in Poland are mentioned in the present work to complete the Polish diatoms list. The current work is the first part in a series of monographs dealing with the diatom taxa belonging to classes Coscinodiscophyceae, Mediophyceae and subclass Fragilariophycidae. A total of 269 diatom species and varieties belonging to 38 genera are recognized. The checklist is comprising 86 entries of Coscinodiscophyceae that includes all radial centric diatoms and 183 taxa of Fragilariophyceae that includes araphid pennate diatoms. Of these 97 diatom taxa are represented as a new record for Poland and 12 new combinations and new varieties. A detailed diatom description, distribution in Poland, andautecological information are presented to round up the content of this volume and documented with 120 plates including 2423 excellent light micrographs of diatom taxa, which allows for a better understanding of morphology to aid in the identification. This work is proposed to contribute towards a general view of the high diatom biodiversity that characterizes Polish ecosystems and provides a revised diatom checklist from Poland. Additionally, it offers the first taxonomic and autecological catalog, which will be significant in the assessment of the water quality monitoring, paleoenvironmental interpretation, and construct the paleoclimate changes.
    Dostawca treści:
    Biblioteka Nauki
    Książka
    Tytuł:
    Preliminary report on unique laminated holocene sediments from the Garun Lake in Egypt
    Autorzy:
    Marks, Leszek
    Salem, Alaa
    Welc, Fabian
    Nitychoruk, Jerzy
    Chen, Zhongyuan
    Zalat, Abdelfattah
    Majecka, Aleksandra
    Chodyka, Marta
    Szymanek, Marcin
    Tołoczko-Pasek, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/2027070.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Holocene
    laminated sediments
    Qarun Lake
    Faiyum Oasis
    Egypt
    Opis:
    The Lake Qarun (Faiyum Oasis, northern Egypt) is a relic of the much larger Holocene lake. Past lake levels and extensions were reconstructed, based on setting of archaeological sites scattered along northern paleoshores of the ancient lake. However, geoarcheological works did not yield enough data to establish continuous environmental history of the lake. A deep drilling FA-1 on the southeastern shore of the lake, performed in 2014, supplied with a core, 26 m long that is the one of the longest lake sediment cores in northeastern Africa. The basal section of the core consisted of thin-laminated diatom marly deposits, underlain at the Late Pleistocene/Holocene boundary by coarse-grained sands. The sediment lamine were quite well developed, especially in the lower part of the core. Preliminary results indicated annually deposited sediment sequence with seasonality signals provided by microlamine of diatoms, calcite, organic matter and clastic material. Early Holocene varved sediments from the Faiyum Oasis supplied with exceptional paleoenvironmental data for northeastern Africa, which enriched a record from previous logs drilled at the southwestern margin of the Qarun Lake.
    Źródło:
    Studia Quaternaria; 2016, 33; 35-46
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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