Background: The healing aspects of natural sounds therapy including water sound are beginning to get a lot of interest in the medical fields. Numerous studies conducted on the value of natural sounds as a therapy for various psychological treatments. Objective: to observe the influence of water fountain melodies on anxiety level among the experimental groups before undergoing dental chec kup an...

background and aims. as a result of poor quality of public water supply in many countries, people have recently turned to bottled water consumption, the fluoride content of which is not generally consistent among different brands. this study sought to measure the fluoride concentration of public water supply in comparison with commercial brands of mineral bottled water available in tehran, iran...

drinking water quality can be deteriorated by microbial and toxic chemicals during transport, storage and handling before using by the consumer. this study was conducted to evaluate the microbial and physicochemical quality of drinking water from bottled water coolers.a total of 64 water samples, over a 5-month period in 2012-2013, were collected from free standing bottled water coolers and wat...

statement of the problem generally, the main source of fluoride intake is drinking water. excessive consumption of bottled water as a substitute or in addition to the tap water supply may have implications for safe fluoride supplementation. in this study, fluoride contents in six commercial brands of bottled water were measured materials and methods six different brands of bottled drinking wate...

background & aims of the study: drinking polluted water can transmit diseases, so potable water treatment is one of the most challenging and complex systems in countries. continuous monitoring for evaluation process in water treatment plant is important. this study aims to investigate performance evaluation of qom water treatment plant to remove turbidity and coliform in 2005 - 2014. materials ...

BACKGROUND A gastroenteritis outbreak was associated with playing in a norovirus-contaminated recreational fountain. OBJECTIVE AND STUDY DESIGN A retrospective cohort study was performed to estimate the magnitude of the outbreak and identify its source. Epidemiological investigation included standardized questionnaires about sex, age, school, class, risk exposures, and illness characteristics...

background existence of fluoride in drinking water above the permissible level causes human skeletal fluorosis. objectives electrocoagulation by iron and aluminum electrodes was proposed for removing fluoride from drinking water. materials and methods effects of different operating conditions such as treatment time, initial ph, applied voltage, type and number of electrodes, the spaces between ...

background: the human body gets fluorine from a variety of sources including food and water. this element is essential in order to prevent tooth decay. however, high concentrations of this element led to a lot of dental fluorosis and skeletal injuries. this study aimed to measure the concentration of fluoride in water and tea consumed in the city of qom. methods: the present study is cross-sect...