Electromechanical properties of high- coupling (1-xi)Pb(Zn1/3Nb2/3)O3-xiPbTiO3 single crystals for sound projectors.

Isothermal weak field frequency sweeps were conducted over the temperature range 30 to 140 degrees C on multidomain, oriented, and poled (1-x)Pb(Zn(1/3)Nb(2/3))O(3)-xPbTiO(3) (PZN-PT) single crystals with x = 0.045, 0.06, 0.

Mechanical and electromechanical properties of PMNT single crystals for naval sonar transducers.

PMNT single crystals in the relaxor-ferroelectric lead magnesium niobate (PMN)-lead titanate (PT) system provide significant advantage for underwater sonar transducers. Compared to lead zirconate titanate (PZT) ceramics, the large electromechanical coupling factor provides significant increases in transducer bandwidth. The superior strain energy density generates higher source level across the band, and the lower Young's modulus allows considerably smaller transducers.

Rhodium dimers with 2,2-dimethyl-1,3-diisocyano and bis(diphenylphosphino)methane bridging ligands.

Four rhodium dimers have been synthesized with a bridging diisocyanide ligand, dmb (2,2-dimethyl-1,3-diisocyanopropane): [Rh2(dmb)4](BPh4)2, [Rh2(dmb)4Cl2]Cl2, [Rh2(dmb)4I2](PF6)2, and [Rh2(dmb)2(dppm)2](BPh4)2 (dppm = bis(diphenylphosphino)methane). The complexes have been characterized by elemental analysis and mass spectrometry, as well as UV-visible, IR, and 1H NMR spectroscopies. X-ray crystal structures of the rhodium(I) complexes, [Rh2(dmb)4](BPh4)2 .

Improving patient access and choice: Assisted Bibliotherapy for mild to moderate stress/anxiety in primary care.

Current traditional methods of mental healthcare service delivery, based on 'specialists' providing 'outpatient appointments' for formal therapy, are often inappropriate for the needs of patients in primary care. The estimated numbers of adults with mental health problems are immense, and it is this, combined with Department of Health initiatives aimed at improving choice and access, which make it essential that new ways of delivering services are explored. This trial examines the use of an assisted self-help treatment package for mild to moderate stress/anxiety [Assisted Bibliotherapy (AB)] with an adult clinical population referred by their general practitioner.

Helix-helix interconversion rates of short 13C-labeled helical peptides as measured by dynamic NMR spectroscopy.

The rates at which a peptide hexamer and a peptide octamer interconvert between left- and right-handed helical forms in CD2Cl2 solution have been characterized by 13C dynamic NMR (DNMR) spectroscopy. The peptide esters studied are Fmoc-(Aib)n-OtBu (n = 6 and 8), where Fmoc is 9-fluorenylmethyoxycarbonyl and Aib is the strongly helix-forming residue alpha-aminoisobutyric acid. Because the Aib residue is itself achiral, homooligomers of this residue form a 50/50 mixture of enantiomeric 3(10)-helices in solution.