Ch. Ender

Surface profiling of trace elements across pre-carious lesions in teeth

Abstract Measurements have been made of the surface distribution of trace elements across naturally occurring pre-carious lesions in human dental enamel, and the healthy enamel adjacent to the lesions. The dominant result of this study was the observation of a strong enhancement of fluorine within the lesion area. The fluorine concentration varied markedly within the lesion itself, showing fine structure at about 100 micron intervals.

Demonstration of polar zinc distribution in pollen tubes ofLilium longiflorum with the Heidelberg proton microprobe

SummaryThe zinc distribution in pollen tubes ofLilium longiflorum was analysed by proton-induced X-ray emission (PIXE) with the Heidelberg proton microprobe. A very high zinc concentration was measured in the pollen tube tip region.

Microprobe profiling of fluorine and other trace elements to large depths in teeth

Abstract Measurements have been made of the distribution of fluorine and a number of other trace elements across the entire thickness of the enamel layer of some well documented teeth, using the Heidelberg microprobe. The concentrations of F, Zn and Sr show characteristic trends over the enamel depth and a clearly defined transition in the concentrations of the elements is observed at the ameleodentin junction.

Identification of excited states in the N = Z nucleus 68 Se with cluster detectors

A first level scheme of

Picosecond lifetime measurement of neutron core-excited states in the N = 50 nucleus 95Rh

{}^{68}\mathrm{Se}

Transient field measurements on32S(21+) ions in Gd at the 1s electron Bohr velocity

with five states up to 4.2 MeV excitation energy and tentative spins

Trace Element Distribution at the Subcellular Level - Possible Correlation between Zinc and mRNA

{6}^{+}

Lifetime of the two-phonon vibrational state in232Th

and

Large oblate deformation of69Se proven by measured transition probability

{7}^{\ensuremath{-}}

Measurement and significance of [Gamma][sub [gamma]]/[Gamma] for the 7117-keV 4[sup +] level of [sup 18]O

has been established from \ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\gamma} coincidences measured with six EUROBALL Cluster detectors in close geometry. The level scheme is interpreted in comparison with neutron deficient nuclei of the