On the relationship between encapsulated ultrasound contrast agent and pressure.

Noninvasive measurement of pressure within the heart cavities and other internal organs (e.g., kidney, liver) has significant clinical value, but currently is not feasible.

Safety of community drinking-water and outbreaks of waterborne enteric disease: Israel, 1976-97.

Waterborne disease remains a major public health problem in many countries. We report findings on nearly three decades of waterborne disease in Israel and the part these diseases play in the total national burden of enteric disease. During the 1970s and 1980s, Israel's community water supplies were frequently of poor quality according to the microbiological standards at that time, and the country experienced many outbreaks of waterborne enteric disease.

Water quality, waterborne disease and enteric disease in Israel, 1976-92.

Israel experienced a large number of waterborne disease outbreaks between 1975 and 1985, followed by a steep decline in the period 1986-92. Large-scale community waterborne disease outbreaks occurred primarily in the late 1970s, and in 1985 (the Krayot, four small towns neighboring Haifa), but substantial outbreaks occurred as late as 1989, with 4 during 1986-90, and 1 during 1991-92. New water standards, including mandatory chlorination of all community water supplies, came into effect in late 1988.

Deterioration of Jerusalem limestone from air pollutants; field observations and laboratory simulation.

Samples of Jerusalem limestones were exposed to high levels of common air pollutants (SO2, NO) in the presence and absence of hydrocarbon, water vapor and ultra-violet light. After exposure, the outer layers were shaved off and analyzed for sulfate and nitrate. The results revealed that even after one day of exposure significant concentrations of CaSO4 and Ca(NO3)2 could be detected in the external 40 μm layers.