diab_a_k

عبده كمال دياب حماية

استاذ - قسم الفيزياء

كلية العلوم

العنوان: جامعة سوهاج - كلية العلوم بسوهاج - قسم الفيزياء

29

إعجاب
8 3 10 13 2 8 775 302
109

أضيف حديثا
  • المقررات الدراسية 8
  • ملحقات المقررات الدراسية 3
  • واجبات المقررات الدراسية 10
  • المنشورات و المؤلفات 13
  • ساعات مكتبية 2
  • الاعلانات 8
  • عدد الملفات المرفوعه 5
  • كل التنزيلات 39

المنشورات و المؤلفات التي تحتوي علي الكلمة المفتاحية: crystal structure

Porous Fe2O3-ZrO2 and NiO-ZrO2 nanocomposites for catalytic N2O decomposition

2019-10-03 18:19:21 الكلمات المفتاحية N2O decomposition, Fe2O3-ZrO2, NiO-ZrO2, nanocomposites, crystal structure, Phase transformation,
Porous Fe2O3-ZrO2 and NiO-ZrO2 nanocomposites for catalytic N2O decomposition
Mesoporous Fe2O3-ZrO2 and NiO-ZrO2 nanocomposites with 10 and 20 wt% of Fe2O3 and NiO composition were prepared by modified sol-gel method. The physico-chemical characteristics of calcined nanocomposites were evaluated utilizing different techniques such as X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron spectroscopy, N2-physisorption, H2-temperature programed reduction, Fourier transformed infrared spectroscopy after pyridine adsorption and X-ray photoelectron spectroscopy. The ... إقراء المزيد

Influence of heat treatment on the magnetic and magnetocaloric properties in Nd0.6Sr0.4MnO3 compound

2018-10-31 00:33:56 الكلمات المفتاحية Magnetic materials, crystal structure, electrical properties, Phase transitions,
Influence of heat treatment on the magnetic and magnetocaloric properties in Nd0.6Sr0.4MnO3 compound
In the present investigation, the effect of annealing temperature on the structural, electrical transport and the magnetocaloric effect of Nd0.6Sr0.4MnO3manganites have been studied. Rietveld refinement of XRD data reveals that all samples are single phase with a space group (Pnma). Heat treatment enhances the grain size and decreases the porosity. All samples suffer Curie transition from ferromagnetic to paramagnetic. Magnetocaloric ... إقراء المزيد

Crystal structure of 1-[2-(4-nitrophenyl)-4,5-diphenyl-1H-imidazol-1-yl]propan-2-ol

2018-10-06 08:07:24 الكلمات المفتاحية crystal structure, Multi-substituted Imidazoles, hydrogen bonding., C—Hinter-actions,
Crystal structure of 1-[2-(4-nitrophenyl)-4,5-diphenyl-1H-imidazol-1-yl]propan-2-ol
The title compound, C24H21N3O3, crystallizes with two unique but closely r.m.s. overlay fit = 0.215 A˚) comparable molecules (1 and 2) in the asymmetric unit of the triclinic unit cell. In molecule 1, the dihedral angles between the central imidazlole ring and the benzene-ring substituents are 42.51 (9), 45.41 (9) and 56.92 (8), respectively. Comparable data for molecule 2 are ... إقراء المزيد

Crystal structure of 1-[2-(4-chlorophenyl)-4,5-diphenyl-1H-imidazol-1-yl]propan-2-ol

2018-10-06 08:11:32 الكلمات المفتاحية crystal structure, Multi-substituted Imidazoles, hydrogen bonding., C-H,
Crystal structure of 1-[2-(4-chlorophenyl)-4,5-diphenyl-1H-imidazol-1-yl]propan-2-ol
The title compound, C24H21ClN2O, crystallizes with two unique molecules in the asymmetric unit. In each molecule, the central imidazole ring is substituted at the 2-, 4- and 5-positions by benzene rings. The 2-substituted ring carries a Cl atom at the 4-position. One of the imidazole N atoms in each molecule has a propan-2-ol substituent. In the crystal, a series of ... إقراء المزيد

Crystal structure of N-[4-amino-5-cyano-6-(methylsulfanyl)pyridin-2-yl]-2-chloroacetamide

2018-09-10 13:09:36 الكلمات المفتاحية crystal structure, poly-functional pyridines, acetamide;, hydrogen bonding., 10.1107/S205698901500256X,
Crystal structure of N-[4-amino-5-cyano-6-(methylsulfanyl)pyridin-2-yl]-2-chloroacetamide
The title compound, C9H10N4OS0.5H2O, crystallizes with two independent molecules (A and B) in the asymmetric unit, together with a water molecule of crystallization. The acetamide moiety, which has an extended conformation, is inclined to the pyridine ring by 7.95 (16) in molecule A and by 1.77 (16) in molecule B. In the crystal, the A and B molecules are linked ... إقراء المزيد

Crystal structure of 4,6-diamino-2-(methylsulfanyl)pyridine-3-carbonitrile

2018-09-10 13:13:11 الكلمات المفتاحية 6-diamino-2-(methylsulfanyl), 4, multifunctional pyridines, crystal structure,
Crystal structure of 4,6-diamino-2-(methylsulfanyl)pyridine-3-carbonitrile
The title pyrimidine derivative, C7H8N4S, is essentially planar, with a maximum deviation of 0.029 (2) A ° from the mean plane of the non-H atoms. In the crystal, molecules are linked by an intermolecular bifurcated N—H N hydrogen bond between the cyano N atom and the two amino groups, an N—H N hydrogen bond between the two amino groups and ... إقراء المزيد

Crystal structute of 4,6-diamino-2-sulfanylidene-1,2-dihydropyridine-3-carbonitrile

2018-09-10 13:22:32 الكلمات المفتاحية polyfuntional pyridines, crystal structure,
Crystal structute of 4,6-diamino-2-sulfanylidene-1,2-dihydropyridine-3-carbonitrile
The title compound, C6H6N4S, crystallizes with two independent molecules, A and B, in the asymmetric unit. Both independent molecules are almost planar [maximum deviations of 0.068 (6) A ° in molecule A and 0.079 (6) A ° in molecule B]. In the crystal, molecules A and B are linked by N—H S, N—H N and C—H S hydrogen bonds, forming ... إقراء المزيد

Crystal structure of N-[4-amino-5-cyano-6-(methylsulfanyl)pyridin-2-yl]acetamide-hemihydrates

2018-09-10 13:32:04 الكلمات المفتاحية crystal structure,
Crystal structure of N-[4-amino-5-cyano-6-(methylsulfanyl)pyridin-2-yl]acetamide-hemihydrates
The title compound, C9H10N4OS0.5H2O, crystallizes with two independent molecules (A and B) in the asymmetric unit, together with a water molecule of crystallization. The acetamide moiety, which has an extended conformation, is inclined to the pyridine ring by 7.95 (16) in molecule A and by 1.77 (16) in molecule B. In the crystal, the A and B molecules are linked ... إقراء المزيد

Crystal structure of (E)-1-{[(3,5-di­methyl­phen­yl)imino]­meth­yl}naphthalen-2-ol

2018-09-11 16:08:09 الكلمات المفتاحية crystal structure, naphthalen-2-ol, imino, hydrogen bonding,
Crystal structure of (E)-1-{[(3,5-di­methyl­phen­yl)imino]­meth­yl}naphthalen-2-ol
The title compound, C19H17NO, has an _E_ conformation about the N=C bond. The mol­ecule is relatively planar, with the benzene ring and naphthalene ring plane being inclined to one another by 4.28 (10)°. There is an intra­molecular O-HN hydrogen bond generating an _S_(6) ring motif. In the crystal, mol­ecules are linked _via_ C-HO hydrogen bonds, forming chains propagating along [100]. ... إقراء المزيد

  • «
  • 1
  • »