Polymer composites of rigid and flexible molecules
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Synthesis, magnetic properties, and X-ray structure of catena-µ 3 -nitrato-O,O′,O″-[µ 3 -hydroxo-1-nitrato-1,2;1,3;2,3-tris(µ-pyrazolato-N,N′)-2,3-bis(pyrazole-N 2 )tricopper( II ) monohydrate]. An unusual chain of trinuclear copper clusters
An unusual trimeric CuII species of formula [Cu3(OH)(pz)3(Hpz)2(NO3)2]·H2O (Hpz = pyrazole) has been prepared from air oxidation of [Cu(Hpz)2(NO3)] in the presence of moisture. The X-ray structure of the oxidation product has been determined by single-crystal diffractometer techniques, and has been compared with a few…
Oxygen Transfer on Substituted ZrO2, Bi2 O 3, and CeO2 Electrolytes with Platinum Electrodes: II . A‐C Impedance Study
An equivalent electrical circuit that describes the electrode processes on different electrolytes, using porous Pt electrodes, is given. Diffusional processes are important and have to be presented by Warburg components in the circuit. The overall electrode process is rate limited by diffusion of atomic oxygen on the…
The Influence of an External Electric Field on the Structure of Chiral Sm C∗ Liquid Crystal
The mechanism of a field induced transition from helical Sm C∗ to Sm C structure in a DOBAMBC liquid crystal situated between two glass plates has been studied by optical methods. The important role of a regular system of twist disclination lines (dechiralization lines) in unwinding the helical structure by electric f…
Behavior of charge-transfer absorption upon passing through the neutral-ionic phase transition
The charge-transfer band is determined from reflectance measurements on single crystals of TTF-chloranil from 300 to 45 K, passing through the neutral-ionic phase transition at 84 K. As the temperature is decreased from 300 K toward the transition, hνCT decreases slowly from 0.66 to 0.55 eV, perhaps the lowest energy…
Relationship of two lacustrine ostracode species to solute composition and salinity: Implications for paleohydrochemistry
Research Article| August 01, 1983 Relationship of two lacustrine ostracode species to solute composition and salinity: Implications for paleohydrochemistry Richard M. Forester Richard M. Forester 1U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Author and Art…
Renormalization group theory of transport properties of polymer solutions. I. Dilute solutions
The (Gell–Mann–Low type) renormalization group theory is applied to frictional properties of dilute polymer solutions for the first time. The universal ratios such as Flory’s intrinsic viscosity constant, the Flory–Scheraga–Mandelkern parameter, etc., are estimated from the first order ε-expansion theory (ε=4−d, d bei…
Transformation behaviour of a Ti50Ni47Fe3alloy II. Subsequent premartensitic behaviour and the commensurate phase
A second ‘premartenaitic’ effect in a Ti50Ni47Fe3 alloy was found to occur approximately 12°C below the onset of the initial ‘normal-to-incommensurate’ transition described in the previous paper. This subsequent phase change involves a structural transition from a ‘distorted’ CsCl parent to a rhombohedral product, dur…
Numerical methods in heat transfer
Topics discussed in this book include modelling the effects of fire, ablation, heat flow in porous rock, thermal stress and dissolving coal. Alternative energy sources such as geothermal reservoirs and solar radiation are also discussed. Includes bibliographies at the end of the papers, a cited author index, and a sub…
Oxygen Transfer on Substituted ZrO2, Bi2 O 3, and CeO2 Electrolytes with Platinum Electrodes: I . Electrode Resistance by D‐C Polarization
The electrode behavior of Pt‐sputtered and PT‐gauze electrodes on ZrO 2 ‐ Y 2 O 3 , Bi 2 O 3 ‐ Er 2 O 3 , and CeO 2 ‐ Gd 2 O 3 solid electrolytes was investigated by means of d‐c measurements in the temperature region of 770–1050 K and in the oxygen partial pressure region of 10 − 5 – 1 atm O 2 using N 2 ‐ O 2 mixture…
Three- and four-co-ordinate, hydrocarbon-soluble-aryloxides of scandium, yttrium, and the lanthanoids; X-ray crystal structure of tris(2,6-di-t-butyl-4-methylphenoxo)scandium
Five new classes of crystalline, hydrocarbon-soluble group 3A metal (M) aryloxides are reported: [M(OAr)3], (1), [M(L)(OAr)3][L = tetrahydrofuran (thf) or P(O)Ph3], [M(OAr)2(µ-OAr)2Na(thf)2], Li[Yb(Cl)(OAr)3], and [{Y(Cl)(OAr)(µ-OAr)}2](Ar = C6H2Me-4-But2-2,6), ranging for (1) from M3+ being the 3d°, 4d°, to the 4fn(n…
Collective effects in a random-site electric dipole system: KTaO3: Li
Li, substituting for K in KTa${\mathrm{O}}_{3}$, creates a local electric dipole, due to its off-center position with respect to the cubic site. We have studied such crystals with different amounts of Li (and in a few cases also doped with Nb, substituting for Ta) by nuclear magnetic resonance, dielectric relaxation,…
The dielectric behaviour of condensed matter and its many-body interpretation
The dielectric properties of condensed matter do not in general follow the Debye model so that, to account for the actual behaviour in solids, distributions of relaxation times have been postulated. It is shown that the frequency response of all solids has common features which can be generalized to give a correct pic…
Standards for nanosecond fluorescence decay time measurements
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStandards for nanosecond fluorescence decay time measurementsRoger A. Lampert, Leslie A. Chewter, David. Phillips, Desmond V. O'Connor, Anthony J. Roberts, and Stephen R. MeechCite this: Anal. Chem. 1983, 55, 1, 68–73Publication Date (Print):January 1, 1983Publication Histor…
Evidence for a Peierls transition in the blue bronzes K0.30MoO 3 and Rb0.30MoO3
X-ray diffuse scattering studies of the quasi one-dimensional blue bronzes K0.30MoO3 and Rb0.30MoO3 show that the metal insulator phase transition observed at Tc = 180 K is accompanied by a periodic lattice distortion. Analysis of the diffuse scattering observed well above Tc shows that the lattice instability involve…
Soil Properties in a Mesquite‐Dominated Sonoran Desert Ecosystem
Abstract Soil was collected in 30‐cm depth increments to 90 cm from beneath Prosopis glandulosa Torr. var. glandulosa (L. Benson) M. C. Jtn. (mesquite) and from the nonvegetated area between mesquite trees in a phreatophytic stand in the Sonoran Desert of southern California. Total N, NO ‐ 3 ‐N, NH + 4 ‐N, organic C,…
Conformational flexibility in a small globular hormone: X‐ray analysis of avian pancreatic polypeptide at 0.98‐Å resolution
Abstract The 36‐amino acid avian pancreatic polypeptide has been studied by x‐ray analysis at 0.98‐Å resolution and refined using a restrained least‐squares technique to an agreement factor of 15.6%. The polypeptide, which has a compact globular structure with a hydrophobic core, comprises a polyproline–like helix (re…
Ferroelectric Liquid Crystal Electro-Optics Using the Surface Stabilized Structure
The strong linear coupling of the director ň to electric field E in ferroelectric liquid crystals can be utilized to perform high-speed electro-optic switching suitable for device applications. In this article we summarize the current understanding of the high-speed, bistable, threshold-sensitive electro-optic effects…
Observations on the Diatom Genus Donkinia Ralfs in Pritchard II. Frustular Studies and Intraspecific Variation
Article Observations on the Diatom Genus Donkinia Ralfs in Pritchard II. Frustular Studies and Intraspecific Variation was published on January 1, 1983 in the journal Botanica Marina (volume 26, issue 12).
Formation of a novel type of adduct between an NADH model and carbonyl compounds by photosensitization using Ru(bpy)32+1
Reactions photosensibilisees par Ru(bpy) 3 2+ du benzyl-1 dihydro-1,4 nicotinamide avec divers composes carbonyles aromatiques conduisant a des composes d'addition 1:1 de structure nicotinamide substitue en 4. Rendements moderes. Reduction nulle ou faible en alcools correspondants. Avec la carbonyle-2,2'-bis pyridine…