Elemental concentrations in tree-rings from red and white oak trees at six sites across Southern Ontario, Canada, were assessed to determine whether they passively record changes in geochemical cycling in the presence of environmental stress. Periods of stress were defined as sustained periods with elevated delta(13)C values in tree-rings relative to atmospheric CO(2) during the same period. In...

toos fertile plain, located between two mountain ranges hezarmasjed and binalood, has attracted different ethnic groups through ages due to environmental conditions, and has provided a proper ground for human inhabitation and continuation of life since oldest times. discovery of handmade tools dated to lower paleolithic age in the middle of the plain and banks of kashaf river (kashaf rud), exis...

Meningococcal disease has historically been associated with military populations, particularly during periods of mobilization. Although the U.S. military has now been engaged in conflicts for nearly a decade, the incidence of meningococcal disease in the U.S. population as a whole has reached historic lows. Despite vaccination of all service members in basic military training, the risk of menin...

Isfahan is a historic city that has experienced several urban developments throughout its shining and glorious past. They began in Al-buyid and Seljuq periods, and continued through the Safavid urban evolution in the sixteenth century. Zayande-Rood is an important and effective natural element in the city's landscape and plan. This article reflects the conclusion of a historic study on revit...

BACKGROUND Schizophrenic patients are known to have difficulty processing emotions and to exhibit impairment in stimuli discrimination. However, there is limited knowledge regarding their physiological responsivity to auditory stimuli. OBJECTIVES The purpose of this study was to compare the respiratory effects of two types of auditory stimuli with emotional content, classical Turkish music (C...

OBJECTIVE This meta-analysis reviews rates of progression of diabetic retinopathy to proliferative diabetic retinopathy (PDR) and/or severe visual loss (SVL) and temporal trends. RESEARCH DESIGN AND METHODS This systematic literature review and meta-analysis of prospective studies assesses progression of retinopathy among diabetic patients without treatment for retinopathy at baseline. Studie...

The objective of this paper was to evaluate oxidative stress during different pregnancy stages in Lohi sheep reared Libya. Investigations were carried out on between 1.5 and 5 years age. A total 40 sub-grouped into various along with non-pregnant controls as follows: (n=10), early mid late (n=10). Blood samples collected from pregnant preserved at -20°C further used for evaluating the concentra...