A study was performed to determine groundwater fluoride concentration of Posht-e-Kooh-eDashtestan area located in southern Iran. Groundwater samples were collected from 26 wells, 4 springs, during dry and wet seasons. Fluoride concentration was determined in the water samples using SPADNS method. The results showed that fluoride concentrations are above the World Health Organization (WHO) maxim...

protecting the environment is becoming one of the most important concerns of the developed and developing countries. reclamation of msw landfills, which are sources of many pollutants including leachate and greenhouse gases, would be very valuable in saving the resources and reducing the pollution scale. in the current article the potential for use of reclaimed waste in rdf production has been ...

to identify arbuscular mycorrhiza fungi (amf) associated with crataegus pontica c. koch, 54 soil samples were collected from the rhizosphere of this plant in ilam province, western iran. isolation of mycorrhizal spores was conducted by wet sieving followed by centrifuge. amf were identified based on morphological characteristics of spores. in this study, 13 species of amf belonging to five gene...

in this research by taking advantage of degradtion model ina grid system an area of 9222 km in eastern part of tehran province including eslam shahr , rey , varamin , damavand , and firooz kooh were studied . the results show that 43.8 % of the area , due to its natural condition , is not suitable for development. the rest of the area ( 42.5) due to the degradation caused by man's activiti...

The reactivity of the Cu(II) complex N,N’-bis(pyridin-2-ylmethylene)propane-1,3-diamine (py2pn), [Cu(py2pn)(ClO4)2], toward O2.− and H2O2 has been examined. reacts with fast second order kinetics, kMcF=4.05×106 M−1 s−1, employing Cu(II)/Cu(I) couple proved by spectroscopic detection reduced form at low temperature. At −40 °C in DMF, reaction H2O2/Et3N yields an stable end-on Cu(II)-hydroperoxid...

Pronatura Península de Yucatán, A.C. Calle 17 #188a x 10, Col. García Ginerés, Mérida, Yucatán 97070, México, e-mail . Anthropology Department, Peace College, 15 Peace St., Raleigh, NC 27604, USA. School of Biological and Earth Sciences, John Moores University, Byrom St., Liverpool L3 3AF, UK. Psychology Department, Chester College of Higher Education, Parkgate Rd., Ches...

kooh-e khajeh (kajeh mountain), with 120m height and 2-2.5km in diameter, is located at hamoon lake like an island. since the archaic era, due to its specific geopolitical location, religious sacredness, and the natural beauty especially at the times of water-richness at hamoon, this place caused the formation of settlements. based on an intensive archaeological survey conducted in this region...