We present an investigation of Er photoluminescence in Y2O3 waveguides codoped with Eu . As a function of europium concentration we observe an increase in decay rate of the erbium I11/2 energy level and an increase of the ratio of photoluminescence emission from the I13/2 and I11/2 states. Using a rate equation model, we show that this is due to an energy transfer from the I11/2→I13/2 transitio...

Drought affects yield of peanut, but its effect on oleic and linoleic acids that influence its oil quality of peanut genotypes with different levels of drought resistance has not been clearly investigated. Therefore, the aims of this research were to determine whether soil water levels could affect oil quality by changes in fatty acid compositions of peanut, and to investigate the changes i...

The abundances of cosmic-ray helium isotopes between 0.2 and 3.7 GeV nucleon~1 were measured by the Isotope Matter Antimatter Experiment (IMAX) during a Ñight from Lynn Lake, Manitoba, Canada on 1992 July 16È17. The IMAX balloon-borne magnetic spectrometer realized a direct measurement of the charge, the velocity, and the rigidity of cosmic rays using plastic scintillators, a high-resolution ti...

There is evidence that alteration in plasma fatty acid composition may play a role in certain neurological disorders. This case control study was conducted to evaluate the association between plasma fatty acid levels and mental retardation in Korean children. Plasma phospholipid fatty acids, plasma lipids, dietary fatty acids and selected nutrients were measured in 31 mentally retarded boys (me...