ectopic cervical thymus (ect) is an essentially benign condition that is identified during the development of the thymus, and is rare among the adult population. thymic hyperplasia is another thymus-associated condition, which is known to occur secondary to hyperthyroidism. a 39-year-old woman with hyperthyroidism presented with an enlarging submandibular mass, which was diagnosed as a benign h...

calixarenes are a readily available and important class of macrocycles in supramolecularchemistry. calixarenes have generated considerable interest due to their basket shaped structureand as useful building blocks to synthesize selective receptors for the guest species, notably alkali,alkaline earth, lanthanide and transition metal cations. in this work studied on the complexingproperties of a ...

hartree-fock (hf) and density functional theory (dft) methods employed to study the effect of conformational change on the 13c chemical shifts of 6-mono axial and equatorial substituted and 6,7-di axial-axial, equatorial-equatorial and axial-equatorial substitutedderivatives of 5,6,7,8-tetrahydrodibenzo[a,c]cyclo-octene. the geometry of the conformers have been optimized in the gas phase employ...

Perchloryl derivatives, especially aromatic ones have some explosive character and decompose explosively when they are initiated. In the present study, ortho, meta para nitro isomers of perchlorylbenzene been considered within framework density functional theory at level B3LYP/6-311++G(d,p). The results indicated that electronically stable such isomer is more than others whereas ortho least all...

Comparison of NMR chemical shift files can provide the researcher with valuable insights. For example, a comparison of NMR chemical shifts obtained for the same protein at various temperatures can provide insights into the protein's thermal stability (Roder, 1989). Also, shift comparisons of a large protein subjected to various detergents can show whether protein tertiary structure is disrupted...