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Abstract Die stereoselektive Synthese der all‐ trans ‐7‐Alkylperhydro‐2‐phenanthrenole 15a – f in 11 Stufen und 28 flüssigkristalline Ester 16 von 15a – f werden beschrieben, daneben einige weitere Derivate der 7‐Alkylperhydro‐2‐phenanthrenole. Vom Ester 16ec wurde eine Röntgenstrukturanalyse durchgeführt.
Maleylpyruvate, the ring fission product of gentisic acid, was found to be isomerized to fumarylpyruvate without a requirement for glutathione by an enzyme activity found in cell extracts of m-hydroxybenzoate-grown Bacillus megaterium 410. The isomerization reaction was detected as a shift in the absorbance maximum fr…
The electrochromic properties of film electrodes of lutetium, erbium, gadolinium, and ytterbium diphthalocyanines in contact with ethylene glycol solutions have been studied. The stability of the electrochromic film under electrochemical cycling in this medium is at least three orders of magnitude better than that in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdiabatic photodehydroxylation of 9-phenylxanthen-9-ol. Observation of carbocation fluorescence in neutral aqueous solutionPeter Wan, Keith Yates, and Mary K. BoydCite this: J. Org. Chem. 1985, 50, 16, 2881–2886Publication Date (Print):August 1, 1985Publication History Publi…
The effect of phonon grain-boundary scattering on the lattice thermal conductivity λL of PbSnTe and PbGeTe has been investigated theoretically as a function of grain size and doping. It is concluded that for optimally doped thermoelectric material with a mean grain size of 0.5 μm, the reductions in λL of PbSnTe and Pb…
To investigate the content of amorphous forms of Fe, Al and Si in podzolic soils, the B horizons from 54 Humo-Ferric Podzols and 24 Eluviated Dystric Brunisols were sampled in northern Ontario. Dithionite-citrate-bicarbonate (DCB) Fe d and Al d , acid NH 4 -oxalate Fe o , Al o and Si o , Na-pyrophosphate Fe p , Al p a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and electronic properties of six-coordinate manganese(III) porphyrin cations. Crystal and molecular structure of bis(N,N-dimethylformamide)(tetraphenylporphinato)manganese(III) perchlorate, [MnIII TPP(DMF)2]+ClO4-Craig L. Hill and Michael M. WilliamsonCite this: I…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Stuart F. Cogan, Elizabeth J. Anderson, Timothy D. Plante, and R. David Rauh, "Electrochemical investigation of electrochromism in transparent conducti…
Abstract A linear lattice model without adjustable parameters provides an accurate description of the magnitude and temperature dependence of the thermal conductivity of K c of polyethylene crystals parallel (∥) and perpendicular (⟂) to the chain direction. The model shows that heat is transported principally by phono…
The mechanism of the breakdown occurring when a dc ramp voltage is applied to low-density polyethylene (LDPE) and silane cross-linked PE at high temperatures is discussed, using experimental results on the Young's modulus Y , high-field conduction and pre-breakdown currents. The electric strength F B of PE was found t…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of the chemical state of palladium in PdNa-X zeolite by electron spin resonance and x-ray photoelectron spectroscopyM. Narayana, J. Michalik, S. Contarini, and Larry KevanCite this: J. Phys. Chem. 1985, 89, 18, 3895–3899Publication Date (Print):August 1, 1985Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAxial-equatorial isomerism in the complexes M(CO)4(L) (M = Fe, Ru, Os; L = Group 15 ligand). Crystal structures of ax-Ru(CO)4(AsPh3), ax-Ru(CO)4(SbMe3), and eq-Os(CO)4(SbPh3)Lillian R. Martin, Frederick W. B. Einstein, and Roland K. PomeroyCite this: Inorg. Chem. 1985, 24, 1…
Cross sections for elastic scattering and excitation of the n=2 states of atomic hydrogen by electrons are computed for incident energies in the range from 12 to 54 eV. The calculations are based primarily on an 11-state expansion including seven pseudostates. Pseudothresholds and pseudoresonances are suppressed by ap…
A rat liver DNA helix-destabilizing protein (HDP) that has previously been proposed to play a role in transcription has been identified as M chain lactate dehydrogenase (LDH-5; L-lactate:NAD+ oxidoreductase, EC 1.1.1.27). Tryptic peptides accounting for 157 amino acids in the rat liver HDP have been characterized and…
Abstract Plasma polymerizations in five silicon compounds having chemical formula of (CH 3 ) 3 SiXSi(CH 3 ) 3 , X = none, CH 2 , NH, O, and S atoms, were investigated by elemental analysis, infrared spectroscopy, and ESCA. The chemical composition of polymers plasma‐polymerized was influenced by the X groups in (CH…
The isothermal permeation of oxygen through was studied at 960°–1450°C and oxygen pressures of 10 −3 to 1 atm on one side of the permeation cell and of 10 −6 –10 −4 atm on the other. In the steady state, the permeating flux was directly proportional to , where varied from 2.5 to 4.0. The value of depended on the micro…
Abstract The composition of myofiber types varies within thigh muscles of chickens. The present study was designed to determine whether or not myofiber types were distributed uniformly across the diameter of the thigh muscles of chickens. Cross sections from middle portions of muscles were used histochemically to exam…
Abstract Residual oil was obtained by waterflooding, under water‐wet conditions, in unconsolidated packs of glass spheres at low capillary numbers. Trapped oil blobs were mobilized in a sequence of decreasing size with subsequent increases in capillary number. The larger blobs, which extend over many adjacent pores, f…
Abstract An ultrahigh‐molecular‐weight polyethylene material covering a range of crystallinity from 42 to 79% increased in calorimetric crystallinity as a result of chain scission following ionizing irradiation. Carbonyl was formed by a diffusion‐limited reaction of oxygen with long‐lived free radicals. Trans ‐vinylen…