Cardiovascular Surveys in Areas with Different Water Supplies

Blood clotting and fibrinolysis in areas with different water supplies.

A sample of venous blood was taken from each subject. Some of this (5 ml) was mixed with fresh 3 * 8% sodium citrate, 9 : 1 volumes blood to citrate, spun immediately at 3,000 r.p.m. for 10 minutes in a MSE centrifuge and the plasma was separated and deep frozen immediately. Two millilitres of blood were mixed with 20J1 of Trasylol and allowed to clot overnight, and then the serum was separated...

Piped-Water Supplies in Rural Areas of the Mekong Delta, Vietnam: Water Quality and Household Perceptions

In the Mekong Delta (MD) in Vietnam, piped-water supply stations are being intensively built to reach the millennium development goal (MDG) to provide safe and clean drinking water resources to communities. However, studies focusing on the effectiveness of supply stations in reaching these goals are scarce to date. Water samples from 41 water supply stations in the MD were collected between Jun...

Bacterial nitrification in chloraminated water supplies.

Nitrifying bacteria were detected in 64% of samples collected from five chloraminated water supplies in South Australia and in 20.7% of samples that contained more than 5.0 mg of monochloramine per liter. Laboratory experiments confirmed that nitrifying bacteria are relatively resistant to the disinfectant. Increased numbers of the bacteria were associated with accelerated decays of monochloram...

Chemical contamination of water supplies.

Man-made organic chemicals have been found in drinking water for many years. Their numbers and varieties increase as our analytical capabilities improve. The identified chemicals comprise 10 to 20% of the total organic matter present. These are volatile or low molecular weight compounds which are easily identified. Many of them are carcinogenic or mutagenic. Chlorinated compounds have been foun...

Adding fluoride to water supplies.