نتایج جستجو برای: chemical analysis methods
تعداد نتایج: 4382170 فیلتر نتایج به سال:
in the present work, the quantum theoretical calculations of the molecular structure of the 1-(1, 3-benzothiazol-2-yl)-3-(thiophene-5-carbonyl) thiourea has been predicted and are evaluated using density functional theory (dft) in gas phase. the geometry of the title compound was optimized by b3lyp/6-311+g and b3lyp/6-311+g* methods and the experimental geometrical parameters of the title compo...
conclusions perceived social support is the most important factor that influences health-promoting behaviors. increasing social support by enhancing self-efficacy and decreasing perceived barriers can improve health-promoting behaviors among veterans. background health-promoting behaviors can enhance physical and mental health among individuals with disability, particularly veterans. objectives...
Abstract When a free nucleus absorbs or emits gamma ray, it recoils to conserve energy, just like gun after shooting bullet. Nuclei bound crystal lattice energy when they absorb emit rays from nuclear transition as are fixed so their movement is restricted. This restriction recoilless resonance fluorescence—the Mössbauer effect. The transmitted through sample reveals its electronic and molecula...
nanocrystalline particles of cerium oxide (ceo2) have been prepared by the chemical precipitation method using cerium nitrate and urea with a molar ratio of 1:2. the results revealed that the formation of ceo2 fine particles is influenced by molar ratio of metal nitrates to fuel. well faceted ceo2 nanoparticles, were synthesized by thermal-assisted dissociation method at reflux temperature in a...
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