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Wyszukujesz frazę "Jansen, R" wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Estimation of the share of components of different ploidy in anisoploid sugar-beet [Beta vulgaris L.] populations by flow cytometry
    Autorzy:
    Sliwinska, E
    Jansen, R
    Powiązania:
    https://bibliotekanauki.pl/articles/2046829.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Beta vulgaris
    ploidy determination
    breeding
    flow cytometry
    seed production
    sugar-beet
    Opis:
    Flow cytometry is commonly used in sugar-beet breeding and seed production for ploidy estimation. By means of this method individual plants as well as plant populations can be analysed. An interpretation of histograms obtained from anisoploid populations, however, causes some problems to the breeder. Bulks of diploid, triploid and tetraploid sugar-beet plants in different proportion and ploidy combinations (2x + 3x, 2x + 4x, and 3x + 4x) were tested in order to determine the relation between the actual share of the components of different ploidy levels in tested populations and that calculated on the basis of flow cytometry. In this way agraph for estimation of the share of different ploidy components was obtained. Repeatability of the results proves the usefulness of flow cytometric analysis of anisoploid plant populations in breeding and seed production of polyploid crops.
    Źródło:
    Journal of Applied Genetics; 1997, 38, 2; 151-160
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applications of Scanning Tunneling Microscopy To Solid State Physics
    Autorzy:
    van Kempen, H.
    Boon, E. J. G.
    van der Wielen, M. C. M. M.
    Wildöer, J. W. G.
    Prins, M.
    Jansen, R.
    Schad, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968742.pdf
    Data publikacji:
    1998-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.16.Ch
    68.35.Dv
    71.55.Eq
    Opis:
    Due to the dependence of the tunnel current to material properties like work function, density of states, and spin polarization the scanning tunneling microscope can be used to study a number of solid state physics problems. This will be illustrated with some examples. The presented examples have in common that also the role of the tip properties have to be taken explicitly into account.
    Źródło:
    Acta Physica Polonica A; 1998, 93, 2; 323-331
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Occurrence of trace metals of toxicological potential in common grass African foxtail (Cenchrus ciliaris)
    Autorzy:
    Awofolu, O.R.
    Iikela, H.
    Jansen, C.
    Hidinwa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/9995.pdf
    Data publikacji:
    2017
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    environment contamination
    pollution
    trace metal
    occurrence
    toxicological property
    grass
    African foxtail zob.African foxtail grass
    buffel-grass zob.African foxtail grass
    African foxtail grass
    Cenchrus ciliaris
    Namibia
    Opis:
    Anthropogenic activities often result in the introduction of noxious contaminants into the environment with resultant distribution and transfer across the food chain. This study reports on the level of trace metals (Cd, Pb, Cu and Zn) in African foxtail (Cenchrus ciliaris) plant; widely referred to as “common grass” and possible implication across the food chain. Plant samples were collected from stratified study area, processed and analysed using validated acid leaching protocols. Instrumental analysis of the metallic content was by ICP-OES. Quality assurance of the analytical protocol revealed its’ applicability to the environmental samples through metallic recoveries (n=3) in the range of 85.6 – 91 %. The overall mean concentration of analysed metals in samples ranged from 9.34 mg/kg – 38.6 mg/kg; 64.2 mg/kg – 105.2 mg/kg; 0.28 mg/kg – 0.73 mg/kg and 0.54 mg/kg – 16.3 mg/kg for Cu, Zn, Cd and Pb respectively across SCP1-SCP4. Incremental order of analysed trace metals across the SCPs were Cu: SCP1>SCP2>SCP3>SCP4; Zn: SCP1>SCP2>SCP3> SCP4; Cd: SCP1>SCP2>SCP3 = SCP4 and Pb: SCP1>SCP2> SCP3>SCP4. Strong correlation (r > 0.99) was obtained between all the analysed trace metals. Significant difference at (p < 0.05) was found between the analysed metals and SCP 1 while those between the metals and SCPs 2- 4 were non-significant. Accumulation of these metals in ruminants and transfer across the food chain is most probable.
    Źródło:
    Environment, Earth and Ecology; 2017, 1, 2
    2543-9774
    2451-4225
    Pojawia się w:
    Environment, Earth and Ecology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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