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    Wyświetlanie 1-3 z 3
    Tytuł:
    Nanospheres caped Pt(II) and Pt (IV): synthesis and evaluation as antimicrobial and Antifungal Agent
    Autorzy:
    Öğütçü, H.
    Yetim, N. K.
    Özkan, E. H.
    Eren, O.
    Kaya, G.
    Sarı, N.
    Dişli, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/778521.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    antimicrobial agent
    antifungal agent
    poly(styrene)
    caped platinium
    Opis:
    Antimicrobial and antifungal polymers are gaining the attention of pharmaceutical makers and industrial design. Nanospheres-Polymers attached Platinum(II) / (IV) complexes have been synthesized to investigate antimicrobial activities. Firstly, nanospheres involving Schiff bases were synthesized from (aminomethyl) polystyrene and four substitute salicylaldehyde (2-hydroxy benzaldehyde, 5-fluoro-2-hydroxy benzaldehyde, 5-kloro-2-hydroxy benzaldehyde, 5-bromo-2-hydroxy benzaldehyde). Secondly, polymers attached Platinum(II) / (IV) complexes have been prepared by means of template method. The IR spectra show that the ligands act in a monovalent bidentate fashion all nanospheres involving Schiff bases. Square-planar and octahedral structures are proposed for Pt(II) and Pt(IV), respectively. All these substances have been examined for antibacterial activity against pathogenic strains, and antifungal activity. In particular, Pt(IV) complexes were more potent bactericides than all of the synthesized substances.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 1; 74-80
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Positron Annihilation Lifetime Analysis of Left- and Right-Handed Alanine Single Crystals
    Autorzy:
    Eren, B.
    Wu, F.
    Eren, E.
    Jean, Y.
    Van Horn, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030024.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    82.30.Gg
    34.80.-i
    87.15.B-
    Opis:
    Studies of the interaction of polarized light or particles (including electrons, e¯, or positrons, e⁺) with asymmetric forms of matter has been of interest to scientists since the discovery of chirality and the subsequent development of particle physics. Researchers have been interested in e⁺ interactions with chiral molecules for decades, but with mixed and indecisive results. After reviewing the field, we speculated that the e⁺ or positronium (Ps) might interact differently with chiral pairs of large single crystals, i.e., the left-handed or right-handed asymmetric forms of the crystals - and subsequently observed significant differences in "free positron" annihilation and intensities in the evaluation of left-handed or right-handed quartz single crystals. This result may be understood to be a "particle stereorecognition" phenomenon. To extend this line of inquiry we crystallized mm scale L- or D-alanine crystals and performed positron annihilation lifetime spectroscopy measurements using a ²²Na positron source. Alanine crystals were obtained via slow evaporation of water in a Dewar, or from water/acetone solvent in a temperature-controlled environment. These methods resulted in small ( ≈0.5 cm/side) or large ( ≥1.0 cm/side) crystals, respectively. While some intensity (I₂) results from left-handed and right-handed crystals varied in positron annihilation lifetime spectroscopy analysis, the errors associated with the measurements do not indicate a stereorecognition of alanine via positron interactions.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1456-1460
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of the use of vermicompost, leonardite and pomace on some soil properties in olive cultivation
    Autorzy:
    Bayyigit, I.
    Sakar, E.
    Eren, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/53691900.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Opis:
    This research was carried out on a 12-year-old Gemlik variety olive grove, located in the historical Deyrulzafaran Monastery in the Artuklu district of Mardin province, Turkey, in the years 2020-2021. The effect of the use of vermicompost, leonardite and pomace, which are known as organic soil improvers, on some properties of soil under olive trees was investigated. The treatments were applied in February 2020 and repeated in February 2021 during the pre-flowering period of olives. At the end of the applications, the soil was analyzed in July 2022. For this purpose, samples were taken from two different depths, 0-30 and 30-60 cm, to represent the orchard soil under an olive grove. According to the research results, the pH of the soil samples taken from the olive orchard, measured in the saturation sludge, varied between 7.18 and 7.69, and the soil was determined to be of neutral and slightly alkaline reaction. The organic matter content of the garden soil, which was determined to have loamy texture (L) with a salt-free structure, proved to rank as follows: pomace > leonardite > vermicompost-treated soil, with the latter having the highest organic matter content compared to the control group. The %N content in the soils increased in the order: vermicompost > pomace > leonardite, the latter being the highest compared to the control group. In soil samples, the following elements were determined in the following quantities: phosphorus 3.01-6.12 kg da-1, potassium 40.00-44.80 kg da-1, calcium 2500-7370 mg kg-1, magnesium 350-422 mg kg-1, sodium 4.42-6.02 mg kg-1, iron 8.19-15.20 mg kg-1, copper 8.44-13.10 mg kg-1 and manganese 26.30-38.70 mg kg-1. It was determined that the phosphorus content of the soils was very low in soil samples taken from 30-60 cm depth, and moderate in soil samples taken from 0-30 cm depth. The potassium content of the soils was determined to be low. All the soil samples were determined to contain excess amounts of calcium. Finally, all the garden soil samples were found to contain adequate amounts of Mg, Na, Fe, Cu and Mn.
    Źródło:
    Journal of Elementology; 2023, 28, 4; 987-999
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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