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Chromatographically pure chlorophyllide a and pheophorbide a were obtained from cultured algae by thin layer chromatography. After 7-10 cell divisions in the presence of 14C, the cells (and all inclusions) used for the study were uniformally labeled. Measurement of the optical densities and radioactivities of chlorophyll a and these other pigments permits(More)
The US Loran system is undergoing a modernization that will result in an enhanced or eLoran system. As a part of this modernization, three 5071A cesium clocks were installed at each transmitter, and state-of-the-art time and frequency clock measurement and control equipment was installed which uses GPS to steer the ensemble averaged Cs clocks to recover UTC(More)
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