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Wyszukujesz frazę "Grochala, W." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Phonon Dispersion Analysis as an Indispensable Tool for Predictions of Solid State Polymorphism and Dynamic Metastability: Case of Compressed Silane
Autorzy:
Kurzydłowski, D.
Grochala, W.
Powiązania:
https://bibliotekanauki.pl/articles/1505181.pdf
Data publikacji:
2011-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.40.Vw
63.20.dk
64.70.K-
81.30.-t
Opis:
Diamond anvil cell experiments suggest that upon compression above 26.5 GPa silane $(SiH_4)$ forms a polymeric phase VI, whose crystal structure has not yet been solved. Here we present DFT calculations showing how phonon-guided optimization leads to a polymeric Fdd2 structure which is the lowest-enthalpy polymorph of $SiH_4$ above 26.8 GPa, and which most probably can be identified as the experimentally observed polymeric phase. The new algorithm of predicting the lowest-energy structures enables simultaneous inspection of the potential energy surface of a given system, calculation of its vibrational properties, and assessment of chances for obtaining a metastable ambient-pressure structure via decompression. Our calculations indicate that at room temperature the differences in the vibrational and entropy terms contributing to the Gibbs free energy of different polymorphs of silane are negligible in comparison with corresponding differences in the zero-point energy corrections, in contrast to earlier suggestions. We also show that the Fdd2 polymorph should be metastable upon decompression up to 5 GPa, which suggests the possibility of obtaining a polymeric ambient-pressure form of $SiH_4$. Polymeric silane should exhibit facile thermal decomposition with evolution of molecular hydrogen and thus constitute an efficient (12.5 wt%) material for hydrogen storage.
Źródło:
Acta Physica Polonica A; 2011, 119, 6; 895-900
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Knowledge of and opinion on organ transplantation among priests of selected Christian religion
Autorzy:
Grochala, M.
Boratyński, W.
Powiązania:
https://bibliotekanauki.pl/articles/1918773.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Transplantation
Christian religion
or-gan donation
medical law
Opis:
Introduction: As Polish society is in its majority Christian, the knowledge and attitudes presented by priests may have a tangible impact on Church mem-bers’ decisions concerning organ donation. Purpose: To evaluate the knowledge, attitudes, and decisions of priests of various Christian denomina-tions regarding organ transplants in Poland. Materials and methods: The paper presents the re-sults of a study carried out in the form of a question-naire survey of 86 priests. Survey participants in-cluded priests of 3 most common Christian denomi-nations in Poland: Catholic, Protestant and Eastern Orthodox. Results: Awareness of the current regulatory frame-work among the clergy is relatively low. Only a small percentage gave correct answers to questions about applicable laws regulating the matter of organ transplantation in Poland. Conclusions: Data gathered during the study implies a positive attitude among priests towards organ transplantation performed to save life and improve health. A vast majority of survey participants support the idea of transplantation. The problem is low awareness of existing documents and laws regulating organ transplantation.
Źródło:
Progress in Health Sciences; 2018, 8(2); 1-9
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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