Biodegradation of oily sludge in Kuwait soil.

Soil microorganisms were not inhibited by mixing oily sludge in soil up to 8.7% (w/w) oil (15% sludge). Adding NH 4 (+) and phosphate increased microbial activity.

Physiologic changes during CO2 and N2O pneumoperitoneum in diagnostic laparoscopy. A comparative study.

The aim of this work was to study the cardiovascular effects, the acid-base balance in serum electrolytes and chlorides in 50 patients during diagnostic laparoscopy, comparing the use of CO2 and N2O for pneumoperitoneum. The CO2 group showed a significant decrease in pH, a significant increase in pCO2 and a significant decrease in pO2, while the changes in HCO3 and base change were insignificant. In the N2O group, the changes in pH, pCO2, pO2, HCO 3 and base excess were statistically insignificant.