Dissolved oxygen (DO) concentration is an important water-quality parameter, and its estimation very for aquatic ecosystems, drinking water resources, agro-industrial activities. In the presented study, a new support vector machine (SVM) method, which improved by hybrid firefly algorithm–particle swarm optimization (FFAPSO), proposed accurate of DO. Daily pH, temperature (T), electrical conduct...

OBJECTIVE To detect an outbreak-related source of Legionella, control the outbreak, and prevent additional Legionella infections from occurring. DESIGN AND SETTING Epidemiologic investigation of an acute outbreak of hospital-associated Legionnaires disease among outpatients and visitors to a Wisconsin hospital. PATIENTS Patients with laboratory-confirmed Legionnaires disease who resided in ...

Background and purpose: School, as a reliable place in educating students, has an important role in training. The aim of this study was the assessment of environmental health of primary schools in Norabad Mamasani city of Fars Province. Materials and Methods: In this analytical-descriptive and cross-sectional study, all of 26 primary schools in Norabad Mamasani city were surveyed by using cens...

Within this paper is presented information about current study of radon and radium analysis in self-bottled drinking water from the public fountain “Elixir” Moklište area, city Kavadarci. Obtained results for measurements, preventive method taken samples, ranged 3.40 up to 3.69 Bq·l–1, while values typical samples 2.60 3.62 Bq·l–1. Radon concentration measured obtained way showed lower than cor...

The application of intense ultrasound to a liquid-gas interface results in the formation of an ultrasonic fountain and generates both mist and vapor from the liquid. Here, the composition of the vapor and aerosol above an ultrasonic fountain is determined as a function of irradiation time and compared with the results of sparging for five different solutions. The experimental apparatus for dete...

abnormal fluoride levels in drinking water have been associated with adverse health effects. to determine the fluoride content of well waters in enugu, southeastern nigeria, water samples from 50 artisan wells chosen by multistage sampling procedure from the 5 zones of enugu municipality were analyzed in duplicates for their fluoride content. the zonal mean values were 0.60, 0.70, 0.62, 0.62, a...

The Holy Shrine of Imam RezaAS is one of the most important places in Iran in terms of religious and public beliefs. Huge volumes of pilgrims travel to the mentioned place, so the appropriated environmental and furniture design to increase the visitors' satisfaction is inevitable. In this regards, the main objective of this study is to identify an appropriated design for public water taps throu...

aims: bottled water is widely used in many countries and more than 100 different brands of bottled water are produced in iran. the aim of the present research was to assess the chemical compound of some iranian brands of bottled water and compare them with the mention information on their labels.     instrument & methods: this descriptive study was performed during march to december 2012 on the...

background: the existence of fluoride ion in potable water has distinctive effects on human health. fluoride is attracted by positively charged calcium in teeth and bones due to its strong electro-negativity which results in dental, skeletal, and non-skeletal forms of xuorosis and associated health complaints in children as well as adults. methods: water samples from groundwater used for drinki...