Phase-matched high-order difference-frequency mixing in plasmas.
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Journal Article↗
Biomedical subjects
C Momma
Publications and source records attributed to C Momma.
Polarization-dependent high-order two-color mixing.
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Journal Article↗
Soft-x-ray lasing to the ground states in low-charged oxygen ions.
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Generation of short-pulse tunable xuv radiation by high-order frequency mixing.
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Liquid chromatographic determination of three sulfonamides in animal tissue and egg.
Sulfonamides are widely used as a feed additive in animal production in Japan. The present paper is a determination of 3 sulfonamides: sulfamethazine (SMZ), sulfamonomethoxine [SMX, 4-amino-N-(3-methoxypyrazinyl)-benzenesulfonamide], and sulfadimethoxine (SDX) in animal tissue and egg by liquid chromatography (LC). Tissues were extracted with acetonitrile and fat was removed by liquid/liquid partition. The sulfonamides were purified by an ODS cartridge column; then each compound was separated by an ODS LC column and detected at 268 nm. Quantification levels were 0.02 ppm for SMZ and SMX, and 0.04 ppm for SDX; detection limits were 0.01 ppm for SMZ and SMX, and 0.02 ppm for SDX. Calibration curves were linear between 2 and 40 ng for SMZ and SMX, and between 4 and 80 ng for SDX. Recoveries from muscle and egg samples spiked with 1-2 micrograms/10 g were 81-98%.
Animals↗