ABSTRACT
Double perovskite type compounds of the formula BaA'LaTeO6 (A' = Na, K, Rb) were synthesized by solid state route and their crystal structures were determined by Rietveld analysis using powder X-ray diffraction and neutron diffraction data. Na compound crystallizes in the monoclinic system with P21/n space group whereas, K and Rb compounds crystallize in Fm3m space group. All the three compounds show rock salt type ordering at B site. Crystal structure analysis shows that La ion occupies A site in Na compound whereas, it occupies B site in K and Rb compounds according to the general formula of AA'BB'O6 for a double perovskite type compound. Effect of this crystallographic site swapping of the La ion was also observed in the photoluminescence study by doping Eu(3+) in La(3+) site. The large decrease in the intensity of the electric dipole ((5)D0-(7)F2) transition in the Rb compound compared to the Na compound indicates that Eu(3+) ion resides in the centrosymmetric octahedral environment in the Rb compound.
Subject(s)
Diabetes Mellitus/physiopathology , Oxidative Stress/physiology , Reactive Oxygen Species/physiology , Diabetes Mellitus/etiology , Diabetes Mellitus/metabolism , Diabetic Angiopathies/etiology , Diabetic Angiopathies/physiopathology , Free Radicals/adverse effects , Humans , Lipid Peroxidation , Risk FactorsABSTRACT
This report supplies supportive data for the hypothesis that a high n-6/n-3 dietary fat ratio is a potent, negative variable in NIDDM. Further work is necessary to critically evaluate this hypothesis.
Subject(s)
Dietary Fats/administration & dosage , Fatty Acids, Omega-3/administration & dosage , Fatty Acids, Unsaturated/administration & dosage , Insulin Resistance , Insulin/pharmacology , Diabetes Mellitus, Type 1/physiopathology , Diabetes Mellitus, Type 2/physiopathology , Dietary Fats/pharmacology , Fatty Acids, Omega-3/pharmacology , Fatty Acids, Omega-6 , Fatty Acids, Unsaturated/pharmacology , Fish Oils/administration & dosage , Humans , IndiaSubject(s)
Diabetes Mellitus/epidemiology , Adult , Cholesterol, HDL/blood , Diabetes Mellitus/blood , Diabetes Mellitus, Type 2/blood , Diabetes Mellitus, Type 2/epidemiology , Humans , India/epidemiology , Prevalence , Rural Population , Socioeconomic Factors , Triglycerides/blood , Urban PopulationSubject(s)
Diabetes Mellitus, Type 2/epidemiology , Diabetic Retinopathy/epidemiology , Adult , Aged , Diabetes Mellitus, Type 2/complications , Diabetes Mellitus, Type 2/therapy , Diabetic Retinopathy/complications , Female , Humans , Hypertension/complications , Hypertension/epidemiology , India , Male , Middle AgedABSTRACT
The study analyzed the extent of tumor at autopsy in 25 patients with a brainstem glioma. Primary tumor in the pons comprised the majority of cases, followed by medulla and midbrain. Histologically, 48% of the tumors were glioblastoma multiforme. The tumor spread was found to be dependent on the site of origin and the grade. Pontine tumors involved the adjacent structures more extensively than the tumors of midbrain and medulla. Contiguous cephalad and caudad involvement was frequent with Grade III and Grade IV tumors. The extent of meningeal involvement was limited to those surrounding the main tumor mass. It is concluded that in the treatment of brainstem gliomas, irradiation through fields limited to the brainstem, adjoining temporal lobes, cerebellum, and proximal spinal cord would be adequate.
