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Now showing items 11-20 of 98
Goniospectrophotometric analysis of pressed PTFE powder for use as a primary transfer standard
(Optical Society of America, 1988-08-15)
n/a
Pressure effects on the photophysical properties of the platinum(II) dimer Pt2(POP)44- (POP = .mu.-.eta.2-H2P2O52-) and related d8-d8 dinuclear complexes in solution
(The American Chemical Society: Journal of Physical Chemistry, 1988-06-30)
The effect of hydrostatic pressure (0.1-300 MPa) upon phosphorescence lifetimes in fluid solution has been examined for four dinuclear d8-d8 transition-metal complexes: A, Pt2(POP)44- (POP = u-n2-H2P2O52-); B, Rh2(br)42+ ...
Mimicry of vertebrates: are the rules different?
(University of Chicago Press: American Naturalist, 1988-06)
Examples of mimicry among vertebrates are numerically fewer than examples involving insects. The relatively small number of species of vertebrates, compared with the number of species of insects, probably explains some of ...
Surface composition and distribution of fluorine in plasma-fluorinated polyimide
(The American Vacuum Society: Journal of Vacuum Science and Technology A: Vacuum, Surfaces, and Films, 1988-05)
Surface composition, fluorine distribution, and morphology were determined for polyimide films modified downstream from microwave plasmas containing CF4/O2. Complementary analytical techniques including x-ray photoelectron ...
Study of Schultz distribution to model polydispersity of microemulsion droplets
(American Chemical Society, 1988-03-24)
We have employed a histogram analysis method to study the spectra obtained by small-angle neutron scattering (SANS)
in order to investigate the size distribution of a model water-in-oil three-component microemulsion. It ...
Photoreactions of docosylcarbonyloctairidate(2-). Homolytic cleavage of an unsupported metal-metal bond linking two tetrahedral iridium carbonyl clusters
(The American Chemical Society: Inorganic Chemistry, 1988-02-28)
Magnetic field mapping
(Wiley: Magnetic Resonance in Medicine, 1988-02)
Homogeneous radiofrequency magnetic fields are necessary for production of high-quality magnetic images and for most forms of magnetic resonance spectroscopy. It is often convenient to map the radiofrequency homogeneity ...
Experimental demonstration of an electromagnetically pumped free-electron laser with a cyclotron-harmonic idler
(American Physical Society, 1988)
A three-wave, free-electron laser was operated with a powerful 8.4-GHz electromagnetic "pump"
wave replacing the usual magnetostatic wiggler. The presence of a uniform axial magnetic field Bo produced
cyclotron-harmonic ...
Synthesis and molecular structure of the eight-coordinate complex bis( 4-amino-N,N’-disalicylidene- 1,2-phenylenediaminato)zirconium( IV), a new reagent for preparing coordination polymers
(The American Chemical Society: Inorganic Chemistry, 1987-12-30)
The precursor complex bis(4-nitro-N,N’-disalicylidene- 1,2-phenylenediaminato)zirconium(IV);Zr(ndsp)2, was synthesized from the appropriate Schiff-base ligand and zirconium tetra-n-butoxide butanol complex (2:1, respectively) ...
The ecological cost of morphological specialization: feeding by a fossorial lizard
(Springer: Oecologia, 1987-08)
Head size and shape of reptiles may reflect selection for multiple uses. For example, sexual selection for large head size may enhance feeding efficiency. In contrast, morphological characteristics of the heads of fossorial ...