abstract aims: fluoride is one of the anions present in soil and water, and determining its level in drinking water is vital for preventing dental and bone diseases in societies. this research aimed to determine fluoride concentrations in drinking water sources of rural and urban areas of babol city, iran. instrument & methods: this descriptive cross-sectional study was conducted in babol city,...

background: geothermal waters could be suitable niches for thermophilic free living amoebae includ­ing naegleria and hartmannella . ardebil province, northwest iran is popular for having many hot springs for recreational and health purposes activity. the present research is the first molecular based investigation regarding the presence of naegleria and hartmannella in the hot springs of ardebil...

lies in their springs, which are usually hot and hold in solution large quantities of mineral organic and gaseous matters, to which for centuries their healing power has been ascribed. The modern view, however, tends to attribute the beneficial effects of these places to change of environment, rest, disciplined exercise, diet and habits of life, rather than to any special therapeutic power of t...

Trends in concentrations of nonpoint-source contaminants in wells, springs, and streams are related to the history of contamination in groundwater recharge and the age distribution in the groundwater discharge. The age distribution in discharge depends on the groundwater age distribution in the aquifer and the subset of flowpaths that are sampled by the discharge. Groundwater travel times from ...

It presents a systematic methodology to evaluate the reservoir characteristics of ChipilapaAhuachapan geothermal field through the highly diluted natural manifestations (springs and domestic wells) in its surroundings. The manifestations are classified in three main groups according to their mechanism of formation: high salinity water (HSW), medium salinity water (MSW), and Sulfated Water (SW)....

Thermophilic bacteria resembling Thermus aquaticus were isolated from hot water taken from domestic and commercial hot-water tanks. Cold water from the same locations never yielded thermophilic bacteria, suggesting that the bacteria were growing in the tanks. In contrast to the T. aquaticus isolates from hot springs, the present isolates were rarely pigmented. In general, the hotter sources mor...

Springs and spring runs represent a unique class of aquatic ecosystems typified by high water clarity and relatively constant water temperature and chemical conditions. Structurally, springs are best characterized by their basin morphometry (shape and volume), their position in the landscape, and their flora and fauna. A classic aquatic food web and biomass pyramid in spring ecosystems includes...