نتایج جستجو برای: drinking water fluoride content

تعداد نتایج: 962794  

Journal: :Lancet 2000
S Hillier C Cooper S Kellingray G Russell H Hughes D Coggon

BACKGROUND Although the benefits of water fluoridation for dental health are widely accepted, concerns remain about possible adverse effects, particularly effects on bone. Several investigators have suggested increased rates of hip fracture in places with high concentrations of fluoride in drinking water, but this finding has not been consistent, possibly because of unrecognised confounding eff...

2012
Sutapa Chakrabarty

Drinking water is often the main source of fluoride intake by humans, especially in areas where their concentrations in groundwater and/or surface water is high. Endemic fluorosis is present in at least 20 states of India, affecting more than 65 million people including 6 million children. Fluoride ion (F) concentrations in India’s groundwater vary widely, ranging from 0.01 mg/L to 48 mg/L. Def...

Nouraddin Mousavinasab Zabihollah Yousefi, Zeinab Tahernezhad

The purpose of present study was to evaluate fluoride, nitrate, iron, manganese and total hardness in drinking water of wells and reservoirs in Fereidonkenar, Mazandaran, Northern Iran and compare the results with national and international standards. This cross-sectional descriptive study was carried out on data during five years from the spring of 2008 until the autumn of 2013. Studies were p...

2016
Ljuben Guguvcevski

Aim: The aim of this study was to determine the optimal concentration of fluoride in drinking water from 11 cities located on different sites throughout the Republic of Macedonia. Method:The optimal level of fluoride in drinking water is universally calculated by applying the equation of Galagan and Vermillion, which permits the calculation of water as a function of temperature. Results:The ann...

ژورنال: پژوهش در پزشکی 2013
دهقانی, منصوره, دوله, محمد, عظیمی, علی اکبر, نورمرادی, حشمت اله, هاشمی, حسن, وفایی, رضا,

Abstract Background: One of the most important components of community’s health is providing clean drinking water. The aim of this study is evaluation of the quality of inlet and outlet water from desalination plants in Qeshm obtained by reverse osmosis (RO) and Multistage flash (MSF) processes and to compare the outlet water quality with National and International standards of drinking wat...

Journal: :Environmental science 2022

Fluoride contamination has created a drinking water crisis globally.

Journal: :بهداشت و توسعه 0
منصوره دهقانی استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت و تغذیه، دانشگاه علوم پزشکی شیراز، شیراز، ایران محمد دوله کارشناس ارشد مهندسی محیط زیست، دانشگاه آزاد اسلامی بندرعباس، بندرعباس، ایران حسن هاشمی مربی، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی شهرکرد، شهرکرد، ایران نرگس شمس الدینی دانشجوی کارشناس ارشد، گروه مهندسی بهداشت محیط، دانشکده بهداشت و تغذیه، دانشگاه علوم پزشکی شیراز، شیراز، ایران mansoureh deghani assistant professor, department of environment health engineering, school of health and nutrition, shiraz university of medical sciences, shiraz ,iran mohammad doleh master of environment engineering, islamic azad university, bandar abbas branch, bandar abbas, iran

background: desalination plants have an important role in providing community drinking water. the increasing trend of water consumption and decrease of natural resources of fresh water make this role even more important. the aim of this study was to evaluate the quality of inlet and outlet water of desalination plants by reverse osmosis (ro) process in qeshm, iran and also to compare the qualit...

Journal: :Journal of Water Resource and Protection 2015

Journal: :Revista panamericana de salud publica = Pan American journal of public health 2000
R J Baez M X Baez T M Marthaler

This study evaluated urinary fluoride excretion by school children 4-6 years old who were living in a south Texas rural community that had concentrations of fluoride in drinking water supplies generally around the optimal level. We took supervised collections of urine samples in the morning and afternoon at school, and parents of the participating students collected nocturnal samples. We record...

2014
Yan Zhang Ji-Yeon Kim Orapin Horst Yukiko Nakano Li Zhu Ralf J. Radlanski Sunita Ho Pamela K. Den Besten

Dental fluorosis is characterized by subsurface hypomineralization and increased porosity of enamel, associated with a delay in the removal of enamel matrix proteins. To investigate the effects of fluoride on ameloblasts, A/J mice were given 50 ppm sodium fluoride in drinking water for four weeks, resulting serum fluoride levels of 4.5 µM, a four-fold increase over control mice with no fluoride...

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