Multiphonon orbit-lattice relaxation in LaBr sub 3, LaCl sub 3, and LaF sub 3.
Multiphonon orbit-lattice relaxation rates in lanthanum bromide, lanthanum chloride and lanthanum fluoride determined using transition energy gap
Moos, H. W.↗
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Multiphonon relaxation of near-infrared excited states of LaCl sub 3 -Dy super 3 super plus.
Multiphonon orbit-lattice relaxation of lower lying excited states of Dy doped lanthanum chloride investigated, using IR fluorescence and quantum counter techniques
RELAXATION TIME↗
Multiphonon Relaxation in Lacl sub 3 -Nd super 3 super plus
Multiphonon relaxation in neodymium doped lanthanum chloride, determining transition rates between stark levels with lifetime and quantum efficiency measurements
EMISSION SPECTRUM↗
Fluorescence decay of rare-earth ions in crystals.
Decay of fluorescent transitions excited by monochromatic radiations for most rare earths in hexagonal lanthanum chloride and other lattices
TRANSITION PROBABILITY↗
Averaging by relaxation and the dynamic Jahn-Teller effect
Strontium chloride lanthanum ion system with dynamic Jahn-Teller effect, indicating isotropic EPM spectrum resulting from averaging by relaxation
Boatner, L. A.↗
The role of calcium in growth induced by indole-3-acetic acid and gravity in the leaf-sheath pulvinus of oat (Avena sativa)
Leaf-sheath pulvini of excised segments from oat (Avena sativa L.) were induced to grow by treatment with 10 micromoles indole-3-acetic acid (IAA), gravistimulation, or both, and the effects of calcium, EGTA, and calcium channel blockers on growth were evaluated. Unilaterally applied calcium (10 mM CaCl2) significantly inhibited IAA-induced growth in upright pulvini but had no effect on growth induced by either gravity or gravity plus IAA. Calcium alone had no effect on upright pulvini. The calcium chelator EGTA alone (10 mM) stimulated growth in upright pulvini. However, EGTA had no effect on either IAA- or gravity-induced growth but slightly diminished growth in IAA-treated gravistimulated pulvini. The calcium channel blockers lanthanum chloride (25 mM), verapamil (2.5 mM), and nifedipine (2.5 mM) greatly inhibited growth as induced by IAA (> or = 50% inhibition) or IAA plus gravity (20% inhibition) but had no effect on gravistimulated pulvini. Combinations of channel blockers were similar in effect on IAA action as individual blockers. Since neither calcium ions nor EGTA significantly affected the graviresponse of pulvini, we conclude that apoplastic calcium is unimportant in leaf-sheath pulvinus gravitropism. The observation that calcium ions and calcium channel blockers inhibit IAA-induced growth, but have no effect on gravistimulated pulvini, further supports previous observations that gravistimulation alters the responsiveness of pulvini to IAA.
Non-NASA Center↗
Doped GdC1(sub 3) High Resolution Thermometers for Use Near to the Lambda Point
The superfluid transition of liquid He provides an excellent testing ground for renormalisation group theory predictions in non-equilibrium phase transitions.
temperature gadolinium chloride lanthanum chloride↗
Hyperfine structure and magnetic behavior of trivalent holmium in hexagonal LaCl sub 3.
Hyperfine structure and modified Zeeman effect in trivalent holmium in hexagonal lanthanum trichloride
SPECTRAL ANALYSIS↗
Electron paramagnetic resonance and spectroscopic study of LaC1 sub 3. Eu super 2 super plus and associated color centers.
Divalent Eu ion ground state splitting in C3h symmetry sites and associated color centers in EPR spectrum study of Eu ion doped lanthanum trichloride
ELECTRON PARAMAGNETIC RESONANCE↗
Effect of chloride incorporation on the crystallization of zirconium-barium-lanthanum-aluminum fluoride glass
One aspect of the influence of preparation procedure on the crystallization behavior of a zirconium-barium-lanthanum-aluminum fluoride glass was studied. The crystallization pattern of this glass may be affected by the chlorine concentration within it. In particular, when such glasses are heated at low temperatures, the alpha-Ba-Zr-F6 crystalline phase forms only in those glasses which contain chloride.
Neilson, G. F.↗