Ara
Toplam kayıt 178, listelenen: 161-170
Microstructural, thermal, and electrical properties of Bi1.7V0.3Sr2Ca2Ca3Ox glass-ceramic superconductor
(Wiley-V C H Verlag Gmbh, 2004)
A glass-ceramic Bi1.7V0.3Sr2Ca2Cu3Ox superconductor was prepared by the melt-quenching method. The compound was characterized by scanning electron microscopy, x-ray diffraction, differential thermal analysis, current-voltage ...
Application of the H-N method to the critical slab problem for reflecting boundary conditions
(Pergamon-Elsevier Science Ltd, 2004)
The recently developed H-N method is used to solve the critical slab problem for a slab which is surrounded by a reflector. In the special case: for R = 0 (the reflection coefficient) the problem reduces to the one under ...
Morphological changes in diseased cementum layers: A scanning electron microscopy study
(Springer, 2004)
The aim or this study was to compare the morphological changes that occurred in root cementum layers due to periodontal disease by using scanning electron microscopy (SEM). Ninety-two periodontally hopeless teeth extracted ...
Investigation of Al-O-Al sites in an Na-aluminosilicate glass
(Indian Academy Sciences, 2004)
This paper reports the presence of Al-O-Al linkages in an aluminosilicate glass where Si/Al = 1 by using 2D O-17 triple quantum MAS NMR technique (3Q MASNMR). The experiments were performed at external magnetic fields of ...
Phosphorus-nitrogen compounds. spiro- and crypta-phosphazene derivatives: synthesis and spectral investigations. Structure of butane- N, N'-bis(1,4-oxybenzyl)- spiro(propane-1,3-diamino)tetrachlorocyclo-2λ 5, 4λ 5, 6λ 5-triphosphazatriene. Part VII
(Elsevier, 2004)
The condensation reactions between trimer, N3P3Cl6, and diamines, 2 and 4 and {1-{N-[1-(2-hydroxynaphthylmethyl)aminomethylidene]}-2(1H)-naphthalenone, 3, yielded the new spiro-cyclic- (5 and 8) and the novel spiro-phosphazene ...
Reversible immobilization of tyrosinase onto polyethyleneimine-grafted and Cu(II) chelated poly(HEMA-co-GMA) reactive membranes
(Elsevier, 2004)
The present study describes the preparation of poly(HEMA-co-GMA) reactive membranes that were grafted with polyethylenimine (PEI) following UV photo-polymerization. The immobilization of tyrosinase was carried out via ...
Verbascum tuna-ekimii (Scrophulariaceae), a new species from Turkey
(Finnish Zoological Botanical Publishing Board, 2004)
Verbascum tuna-ekimii Karaveliogullari, Duran & Hamzaoglu sp. nova (sect. Bothrosperma) is described from E Anatolia in Turkey. It is related to and compared with V. laetum, from which it mainly differs in its leaves, ...
Dispersion-strengthening effect of Cu-based Mn, Al, and Zn rich alloys
(Elsevier Science Sa, 2004)
In this systematic study, dispersion-strengthening effect of the Cu-25.91Mn (wt.%), Cu-26.62Mn-8.99Al (wt.%), Cu-22.17Mn-12.32Zn (wt.%) ingot alloys have been investigated. Samples were homogenized at a high fixed temperature ...
Poly(styrene-hydroxyethyl methacrylate) monodisperse microspheres as specific sorbent in dye affinity adsorption of albumin
(Taylor & Francis Inc, 2004)
In this study, human serum albumin (HSA) adsorption properties of reactive green HE-4BD-attached monodisperse poly(styrene-2-hydroxyethyl methacrylate) [poly(St-HEMA)] microspheres were investigated. Poly(St-HEMA) microspheres ...
Phytosociological studies on salty steppe communities of Central Anatolia, Turkey
(Brill Academic Publishers, 2004)
The salty steppe vegetation of the Central Anatolian subregion of the Irano-Turanian phytogeographical region was examined synecologically and syntaxonomically. In the vegetation surrounding the salt lakes of this region, ...