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Wyświetlanie 1-4 z 4
Tytuł:
Structural and Spectroscopic Characterization of 1-(5-Bromothiophen-2-yl)-3-(4-nitrophenyl)prop-2-en-1-one: An Analysis of Electronic and NLO Properties
Autorzy:
Tamer, Ö.
Avcı, D.
Atalay, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1204951.pdf
Data publikacji:
2014-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.15.E-
33.20.Ea
33.20.Lg
42.65.-k
67.80.Jd
Opis:
The molecular structure of 1-(5-bromothiophen-2-yl)-3-(4-nitrophenyl)prop-2-en-1-one with $C_{13}H_8BrNO_3S$ empirical formula was simulated using B3LYP and CAM-B3LYP levels of density functional theory. After BTNP was optimized on the ground state, its characterization was enhanced via IR, NMR and UV-vis spectroscopies. Conformational analysis was performed based on B3LYP level so as to find the stable conformers of BTNP. Electronic transitions were calculated, and the important contributions from the molecular orbitals to the electronic transitions were investigated. HOMO and LUMO energies were calculated, and obtained energies displayed that charge transfer occurs in BTNP. It was displayed that BTNP is an efficient NLO material due to the coplanar of phenyl-nitro group and carbonyl group. NBO analysis also proved that charge transfer, conjugative interactions and intramolecular hydrogen bonding interactions occur through BTNP.
Źródło:
Acta Physica Polonica A; 2014, 126, 3; 679-687
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal Control Problem for a Conformable Fractional Heat Conduction Equation
Autorzy:
Iskender Eroğlu, B.
Avci, D.
Özdemir, N.
Powiązania:
https://bibliotekanauki.pl/articles/1031263.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.10.+i
02.30.Yy
02.60.Cb
81.40.Jj
Opis:
This paper presents an optimal boundary temperature control of thermal stresses in a plate, based on time-conformable fractional heat conduction equation. The aim is to find the boundary temperature that takes thermal stress under control. The fractional Laplace and finite Fourier sine transforms are used to obtain the fundamental solution. Then the optimal control is held by successive iterations. Numerical results are depicted by plots produced by MATLAB codes.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 658-662
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Investigation of N-Methyl-N-(4-nitrobenzylidene) pyrazine-2-carbohydrazide: Conformational Study, NBO Analysis, Molecular Structure and NMR Spectra
Autorzy:
Günay, N.
Tamer, Ö.
Kuzalic, D.
Avcı, D.
Atalay, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1398702.pdf
Data publikacji:
2015-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.15.A-
31.15.ae
31.15.E-
33.25.+k
31.50.Bc
Opis:
The crystal structure determination of the methylated pyrazine-2-carbohydrazide derivative, namely N-methyl-N'-(4-nitrobenzylidene)pyrazine-2-carbohydrazide were optimized to obtain its molecular geometric structure and electronic structures at the Hartree-Fock and density functional theory levels (B3LYP) with 6-311G(d,p) and 6-311++G(d,p) basis sets, using Gaussian 09W programme. The $\text{}^{1}H$ and $\text{}^{13}C$ nuclear magnetic resonance chemical shifts of the title molecule were calculated by using the gauge independent atomic orbital, continuous set of gauge transformations and individual gauges for atoms in molecules methods and were also compared with experimental values. The electronic properties high occupied and low unoccupied molecular orbitals energies were calculated and analyzed. Potential energy surface scan, natural population analysis and Mulliken atomic charges were investigated using theoretical calculations. A detailed molecular picture and intermolecular interactions arising from hyperconjugative interactions and charge delocalization of the molecule were analyzed using natural bond orbital analysis.
Źródło:
Acta Physica Polonica A; 2015, 127, 3; 701-710
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sleep quality and fatigue levels of mothers in the period of transition to additional food
Autorzy:
Çelık Eren, D.
Ilknur, Aydin Avci
Powiązania:
https://bibliotekanauki.pl/articles/1918781.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Additional food
fatigue level
sleep quality
mothers
Opis:
Purpose: To determine the sleep quality and fatigue levels of mothers in the period of transition additional food. Materials and methods: It was a relation seeking descriptive study which contained 377 mothers who had sixth month babies. The datas of the study was collected in Samsun between June and December 2015 with "Personal Information Form", "Pittsburgh Sleep Quality Questionnaire” and "Piper Fatigue Scale”. The statistical analysis of the data was made with using percentages, means, t test, ANOVA, Kruskal Wallis, Man Whitney U and correlation test. Results: It was found that the average age of mothers was 28.1±5.2 years, 44.8% of them high school graduated, 25.2% of them working outside, 78.8% of them lived in a nuclear family. It was determined 69.6% of the babies passed the additional food before sixth month, and 31.5% of them passed with baby formula. It was appointed that the 65.3% of mothers in period of transition additional food experienced sleep problems and 66.6% of them experienced fatigue. It was found a positive weak and significant correlation between the mothers Pittsburgh Sleep Quality Questionnaire scores and and Piper Fatigue Scale scores (p<0.05). Conclusion: It was seen that in the period of transition additional food, the mothers experience problems about the passing time, first foods and feeding method and this situation causes insomnia and fatigue. According to the results it could be recommended to development of training programs for the improvement of mothers' sleep quality and fatigue levels.
Źródło:
Progress in Health Sciences; 2018, 8(2); 25-32
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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