منابع مشابه
Hardness of drinking-water and cardiovascular disease.
In the past 10 years or so evidence has been accumulating about an environmental factor which appears to be influencing mortality in particular, cardiovascular mortality and this is the hardness of the drinking-water. There is an inverse association between indices of water hardness and cardiovascular death rates ; the softer the drinking-water the higher the death rates. This association has b...
متن کاملLimitation of hardness from thermal water by means of nanofiltration.
Geothermal conditions are extremely favourable in Hungary. Thermal water is accessible in 70% of the territory of the country, with a lowest temperature of 30°C. For energetic purposes, it can be utilized in two different ways: for supplying heat or generating electricity. In relation to utilization, one of the most serious problems derives from the chemical composition of thermal water. The pr...
متن کاملInvestigation acute toxicity some of heavy metals at different water hardness
All aquatic organisms are directly or indirectly affected by the physical characteristics of their environment, especially the chemical composition of the water. The high concentration levels, damage tissues and interfere with the normal growth and proliferation. The aim of this research was to Investigation acute toxicity of ZnSO4 and CuCl2 to Gambusia holbrooki ...
متن کاملInvestigation acute toxicity some of the heavy metals at different water hardness
All aquatic organisms are directly or indirectly affected by the physical characteristics of their environment, especially the chemical composition of the water. The high concentration levels, damage tissues and interfere with the normal growth and proliferation. The aim of this research was to Investigation acute toxicity of ZnSO4 and CuCl2 to Gambusia holbrooki ...
متن کاملClimate, Water Hardness and Coronary Heart Disease*7
GEOORAPIIIC variation in coronary heart disease mortality within the United States has been shown to be considerable [I]. These differences appear to be real, and not attribu~ble to varying patterns of medical practice or death ~~~~tion. Other workers [2-4] have shown that there are marked differences in coronary disease rates even within a given state. The reason behind these differences may b...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1881
ISSN: 0036-8733
DOI: 10.1038/scientificamerican08131881-4673asupp