Native methionine enkephalin and methionine enkephalin generated proteolytically from a larger peptide were both identified and quantified from bovine cornea by negative ion fast atom bombardment-mass spectrometry. The corneal peptides were purified initially be reverses-phase high performance liquid chromatography and identified tentatively by radioreceptor assay and/or radioimmunoassay.

Phosphatidylserine from human plasma was purified and identified by amino normal-phase and octadecylsilyl reversed-phase high-performance liquid chromatography, respectively. The two major molecular species within the human plasma phosphatidylserine, qualitatively determined by negative-ion fast atom bombardment mass spectrometry, are 1-stearoyl-2-oleoyl-sn-glycero-3-phosphoserine and 1-stearoy...

Absolute sputtering yields of liquid tin from 240 to 420 C due to irradiation by low-energy helium and deuterium have been measured. For ion energies ranging from 300 to 1000 eV, temperature enhancement of liquid tin sputtering was noted. These measurements were obtained by IIAX (the Ion-surface InterAction eXperiment) using a velocityfiltered ion beam at 45 incidence to sputter material from a...