نتایج جستجو برای: ramsar
تعداد نتایج: 682 فیلتر نتایج به سال:
Abstract Eutrophication is a significant threat to surface water biodiversity worldwide, with excessive phosphorus concentrations being among the most common causes. Wetland ditches under these conditions shift from primarily submerged aquatic vegetation algae or duckweed dominance, leading shading and anoxic conditions. Phosphorus, both point (e.g. wastewater treatment works) diffuse (largely ...
Although there are substantial experimental, epidemiological and clinical evidences that high doses of ionizing radiation cause cancer and other detrimental biological effects, the health effects of human exposure to chronic low dose radiation exposures are still poorly known. People in some areas around the world live in dwellings with radiation and radon levels as much as more than 2...
Background: We intend to study the inhibitory effect of sulfur compound in Ramsar hot spring mineral on tumor-genesis ability of high natural background radiation. Objective: The radioprotective effect of sulfur compounds was previously shown on radiation-induced chromosomal aberration, micronuclei in mouse bone marrow cells and human peripheral lymphocyte. Ramsar is known for having the highe...
The coastal area of Ramsar in northern of Iran located in the province of Mazandaran has been known as the highest levels of natural radiation background in the world. The background radiation is mainly due to the presence of radioactive isotopes of the radium element and its decay products, which is brought to the surface by hot springs. In this study, the indoor gamma dose rate in Ramsar wa...
BACKGROUND Hormesis is defined as the bio-positive response of something which is bio-negative in high doses. In the present study, the effect of radiation hormesis was evaluated on the survival rate of immunosuppressed BALB/c mice by Cyclosporine A. MATERIAL AND METHODS We used 75 consanguine, male, BALB/c mice in this experiment. The first group received Technetium-99m and the second group ...
BACKGROUND Ramsar, a city in northern Iran, has areas with some of the highest recorded levels of natural radiation among inhabited areas measured on the earth. AIMS To determine whether short-term exposure to extremely high levels of natural radiation induce oxidative stress. MATERIALS AND METHODS In this study, 53 Wistar rats were randomly divided into five groups of 10-12 animals. Animal...
As a precious resource, wetlands support human life in various profound ways, either explicitly or implicitly. However, the values of have not been sufficiently recognized and greatly appreciated. Their management approaches are often sectoral, wise use is still more catchphrase than well-used practice. This paper presents cross-sectoral case study for evaluation primary practices Ramsar-regist...
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