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    Wyświetlanie 1-4 z 4
    Tytuł:
    A comparison of PCR-based markers for the molecular identification of Sphagnum species of the section Acutifolia
    Autorzy:
    Sawicki, J.
    Szczecinska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/57748.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Acutifolia
    random amplified polymorphic DNA
    Sphagnum
    genetic similarity
    molecular identification
    molecular marker
    polymerase chain reaction
    genetic relationship
    species identification
    peat moss
    chloroplast
    nuclear genome
    Opis:
    RAPDs, ISJs, ISSRs, ITS and katGs were applied to determine genetic relationships between common Sphagnum species of the section Acutifolia. Twenty populations were genotyped using ten ISJ primers, 12 pairs of katG primers, 10 ISSR and 10 RAPD primers, and a restriction analysis of ITS1 and ITS2. ISSR and katG markers revealed the greatest number of species-specific bands. An analysis of ITS1 and ITS2 regions with restriction enzymes also proved to be a highly effective tool for species identification.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2011, 80, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic variation of the relict and endangered population of Chamaedaphne calyculata (Ericaceae) in Poland
    Autorzy:
    Szczecinska, M
    Sawicki, J.
    Wasowicz, K.
    Holdynski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/41179.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    plant species
    rare species
    Polska
    endangered population
    relict population
    genetic variation
    Chamaedaphne calyculata
    Ericaceae
    genetic diversity
    conservation
    geographic distribution
    Opis:
    Chamaedaphne calyculata is rare and endangerded species of Polish flora. The genetic variation within and among ten polish population of leatherleaf was analysed by ISSR and ISJ markers. The analysis revealed a total of 160loci with an average of 13.3 bands per primer. We expected a low level of genetic diversity of this narrowly distributed species in Poland, but our results indicate that Ch. calyculata revealed a high level of genetic diversity at species level (P=88.7%of polymorphic loci, AE=1.468, HE=0.290). At the population level, the variation of Ch. calyculata was significantly lower (P=27.6%, AE=1.140, HE=0.098). There was significant correlation between ecological properties (population size; number of flowering ramets) and genetic diversity parameters. Analysis of molecular variance showed that most of variation (62%) in Ch. calyculata occurred among population. Gene flow (Nm) between the ten studied populations, determined based on the GST index, was very low at 0.239. It indicated that the fragmentation and isolation of populations might result from specific evolutionary history of this plant and postglacial recolonization
    Źródło:
    Dendrobiology; 2009, 62; 23-33
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Workers’ Active Involvement in the Improvement of Occupational Safety and Health in a Textile Enterprise—A Case Study
    Autorzy:
    Milczarek, M.
    Szczecińska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/90677.pdf
    Data publikacji:
    2006
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    safety management
    workers’ involvement
    occupational risk
    bezpieczeństwo pracy
    bezpieczeństwo i higiena pracy
    warunki pracy
    czynniki ryzyka
    Opis:
    Part of the Polish-Swedish OSHMAN project was carried out in a textile company. It aimed at implementing and improving effective health and safety management with workers’ active involvement at all levels of the enterprise. The two main problems to be solved during the project were decreasing occupational risk and improving workers’ poor knowledge on occupational risk. Training courses, workshops and practical activities were undertaken. As expected, there were changes in work organisation and improvement in the way workstations were looked after, which led to a decrease in occupational risk. Workers were highly committed during the project. Nevertheless it seems that more training should be directed at middle management.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2006, 12, 1; 69-77
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The photoluminescent layers based on ZnO nanoparticles as radiation converters in photovoltaic applications
    Autorzy:
    Szczecińska, N.
    Znajdek, K.
    Sosna-Głębska, A.
    Lewicki, P.
    Czarnecki, P.
    Kraska, P.
    Bazdyga, C.
    Wiosna-Sałyga, G.
    Sibiński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/105700.pdf
    Data publikacji:
    2018
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    down-conversion layers
    down-shifting layers
    photoluminescence nanoparticles
    solar cells efficiency
    zinc oxide nanoparticles
    photoluminescence layers
    nanocząstki fotoluminescencji
    efektywność ogniw słonecznych
    nanocząsteczki tlenku cynku
    warstwy fotoluminescencyjne
    Opis:
    The mismatch between solar cell response and solar spectrum is one of the biggest challenges to achieve high efficiency in photovoltaic cells. There are a few different approaches to minimise this concern. One of them is the radiation conversion which may be due to three different processes, namely up-conversion, down conversion and down-shifting. In this paper the down-conversion process of zinc oxide nanoparticles (ZnO NPs) and layers with ZnO NPs in polymer (poly (methyl methacrylate)) (PMMA) matrix will be analysed. ZnO NPs are prone to act as down-converting or down-shifting agents, which absorb the UV radiation, which is not absorbed by the solar cell, and then re-emit light in the visible range, which is suited to the photovoltaic cell sensitivity. Herein, the photoluminescence and optical transmittance of ZnO NPs and layers based on ZnO NPs will be presented. These parameters have a large influence on the potential application of these layers in photovoltaic structures for increased efficiency. The conversion layers have to fulfil the following conditions: have good optical transmittance in the visible range and high luminescence efficiency in converting UV radiation into visible. The paper focuses on finding the balance between these parameters.
    Źródło:
    Acta Innovations; 2018, 29; 16-26
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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