introduction: during the last 3 decades, human is exposed to extremely low frequency electromagnetic fields (elf-emf) emitted by power lines and electronic devices. it is now well accepted that elf-emf are able to produce a variety of biological effects, although the molecular mechanism is unclear and controversial. investigation of different intensities effects of 50 hz elf-emf on cell morphol...

Background: Alteration in polymorphism of tissue collagens has been reported in association with some genetic and metabolic disorders. These alterations can be estimated quantitatively by measuring alpha-chain monomers derived from the polymeric form of collagens following treatment with sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). We studied the rate of placental colla...

OBJECTIVE A morphological and ultra-structural study of copper vapor laser (lambda = 510.6 nm) effects on enamel and dentine was performed to show the effects of this radiation. METHODS A total of 15 human molars were cut in half; 15 pieces were separated for irradiation on enamel and 15 for dentine. These two groups were further divided into five experimental groups, including a control grou...

The aim of this study is determination and separation of alteration zones using Concentration-Area (C-A) fractal model based on remote sensing data which has been extracted from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images. The studied area is on the SW part of Saveh, 1:250,000 geological map, which is located in Urumieh-Dokhtar magmatic belt, Central Iran. The ...