The goal of this thesis has been to test Phoslock® as an artificial tracer that can be used as a time marker in the sediment. The application of Phoslock® is a method to restore a lake by removing phosphate from water. Phoslock® consists of bentonite and lanthanum. It was decided to test Phoslock® because …

In 1996 innovative, double major teacher education programs for Physics & Mathematics and Physics & Chemistry were initiated at the University of San Carlos in Cebu, Philippines. Both programs require 4 years of study. From the outset the focus was on making a difference in the quality of Science and …

This letter to the editor argues that the assumption of a single value for the acetate recovery factor in carbon-13 stable isotope research for different individuals, can lead to significant errors in the outcomes of substrate utilization measurements.

The data of this study indicate that the acetate recovery factor, used in stable isotope research, needs to be deteremined in every subject, under similar conditions as used for the tracer-derived determination of substrate oxidation.