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    Wyświetlanie 1-3 z 3
    Tytuł:
    FT-IR, Thermal and NLO Studies on Amino Acid (L-Arginine and L-Alanine) Doped KDP Crystals
    Autorzy:
    Muley, G.
    Rode, M.
    Pawar, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1585044.pdf
    Data publikacji:
    2009-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Hq
    Opis:
    Single crystals of pure and amino acid (L-arginine and L-alanine) doped potassium dihydrogen phosphate (KDP) for second harmonic generation have been grown from low temperature solution growth method by employing slow evaporation of the solvent. FT-IR spectrum of pure and doped KDP crystals confirms qualitatively the doping of the L-arginine and L-alanine in the host crystals. UV-visible spectroscopy shows the improvement in the transparency. Crystal structure has been studied by powder X-ray diffraction. Modification in the lattice parameters has been observed. Improvement in the SHG efficiency was studied by the Kurtz and Perry method. Thermal analysis has been performed on the grown crystals.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 6; 1033-1038
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystal Structure Prediction and Charge Density Distribution of Highly Energetic Dimethylnitraminotetrazole: a First Step for the Design of High Energy Density Materials
    Autorzy:
    Arputharaj, D. S.
    Srinivasan, P.
    Asthana, S. N.
    Pawar, R. B.
    Kumaradhas, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/358205.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    energetic materials
    crystal structure prediction
    charge density analysis
    atoms in molecules
    electrostatic potential
    Opis:
    The crystal structure of dimethylnitraminotetrazole has been predicted, based on systematically searching for densely packed structures within common organic crystal coordination types, followed by lattice energy minimization. The predicted crystal structures almost match the reported crystal structure determined by X-ray diffraction analysis. To understand the effect of the initial molecular geometry on the crystal packing, the crystal structure simulation was carried out for molecules taken from different environments, such as the X-ray structure (crystal field) and also from ab initiocalculations (gas phase). The predicted crystal structures from both environments are very similar to the reported X-ray structure with a maximum deviation of 4.5%. The crystal density predicted from both methods is close to that reported. The bond topological, energetic and electrostatic properties of the isolated molecule from the predicted crystal structure have been determined using Bader's theory of atoms in molecules. The bond topological characterization reveals that the C-N bond is the weakest bond in the molecule. A large electronegative potential is found in the vicinity of the NO2group and the nitrogen-rich region of the tetrazole ring; these are probably the reactive sites of this molecule.
    Źródło:
    Central European Journal of Energetic Materials; 2012, 9, 3; 201-217
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of the Retinol and Phytol for the quality improvement of cocoon and silk fibre spinned by fifth instar larvae of silkworm, Bombyx mori (L) (Race: PM x CSR2)
    Autorzy:
    Khyade, Vitthalrao B.
    Gokule, Kajal D.
    Pawar, Sunanda Rajendra
    Deshmukh, Rajkumar B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1190151.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Vitamin
    Retinol
    TSI
    Shell Ratio
    Denier Scale of Silk Filament
    Phytol
    Opis:
    By convention the term vitamin includes neither other essential nutrients, such as dietary minerals, essential fatty acids, or essential amino acids (which are needed in greater amounts than vitamins) nor the great number of other nutrients that promote health, and are required less often to maintain the health of the organism. Thirteen vitamins are universally recognized at present. Vitamins are classified by their biological and chemical activity, not their structure. Thus, each "vitamin" refers to a number of vitamer compounds that all show the biological activity associated with a particular vitamin. Such a set of chemicals is grouped under an alphabetized vitamin "generic descriptor" title, such as "vitamin A", which includes the compounds retinal, retinol, and four known carotenoids. Vitamers by definition are convertible to the active form of the vitamin in the body, and are sometimes inter-convertible to one another, as well. Topical application of ten microliters of one milligram per liter strength acetone solution of retinol phytol to the individual fifth instar larvae of multivoltine cross breed race of silkworm, Bombyx mori (L) ( PM x CSR2) at 48, 54, 60 and 66 hours after the fourth moult was found variously reflected into prolongation of larval age (14 – 39 % for retinol treated groups and 17 – 42 % for phytol treated groups); improvement in the tissue somatic index (TSI) of silk glands (3.053 – 3.343 for retinol treated groups and 3.070 – 3.092 % for phytol treated groups); cocoon shell ratio (2.790 – 3.177 for retinol treated groups and 2.693 – 3.629 for phytol treated groups) and denier scale of silk filament (p < 0.01). Retinol and phytol, thus chiefly lengthening the larval age in silkworm, Bombyx mori (L). The synergistic activity of diterpenoids in the present attempt is hypothesized to be due to changes in the membrane fluidity, interference with membrane bound signaling proteins and cell cycle arrest. Efficient utilization of diterpenoids like, retinol and phytol, through acetone solvent for topical application to the fifth instared larvae of silkworm, Bombyx mori (L) may open a new biotechnological and Vitamin oriented avenue in the sericulture industries. Efficient use of Vitamin A and Phytol serve to orchestrate the qualitative progression of silk.
    Źródło:
    World Scientific News; 2016, 42; 167-181
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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