Materials Literature
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Solution properties of three manganese porphyrins, in monomeric form, were investigated. These were the 'picket-fence-like' porphyrin Mn(III)-alpha,alpha,alpha,beta- tetra-ortho(N-methylisonicotinamidophenyl)porphyrin (Mn(III)PFP) and two 'planar unhindered' porphyrins, the Mn(III)TMPyP (tetrakis (4-N-methylpyridyl)po…
Abstract not Available.
of its plateau-
Abstract Five vinylcatechol precursors have been synthesized by either alcohol dehydration or Wittig coupling techniques. Dehydration of the appropriate sec ‐phenethyl alcohol is the most efficient synthetic approach: the following monomers (yields) are reported: 5‐vinyl‐1,3‐benzodioxole, I (63%); 3,4‐dimethoxystyrene…
Accurate, O(5%) measurements of total-atom differential coherent-scattering cross sections of Sn and Pb within the range of scattering angles 10?(de60\ifmmode^\circ\else\textdegree\fi{} have been performed using 279.2and Comparison, with the predictions of Kissel, Pratt, and Roy and the various form-factor formulation…
In order to understand the hydrogen permeation phenomena in multiple metal layers, the time dependent permeation rates for duplex membranes of Cu–Ni and Cu–Fe have been systematically measured under hydrogen pressures from 103 to 105 Pa at temperatures from 500 to 1000 K, and the obtained results are compared with the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotocontrol of polypeptide membrane functions by cis-trans isomerization in side-chain azobenzene groupsTakatoshi Kinoshita, Morimasa Sato, Akira Takizawa, and Yoshiharu TsujitaCite this: Macromolecules 1986, 19, 1, 51–55Publication Date (Print):January 1, 1986Publication H…
Abstract Poly(4‐vinylbenzaldehyde)s ( 4 ) of known chain lengths and of narrow molecular weight distributions (M̄ w /M̄ n ≈ 1,1) were synthesized by means of anionic living polymerization of 1,3‐dimethyl‐2‐(4‐vinylphenyl)imidazolidine ( 1 ) with oligo[α‐methylstyryl]potassium ( 2 ) and subsequent acid hydrolysis to re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicroheterogeneous photooxidationD. C. Neckers and Jerzy. PaczkowskiCite this: J. Am. Chem. Soc. 1986, 108, 2, 291–292Publication Date (Print):January 1, 1986Publication History Published online1 May 2002Published inissue 1 January 1986https://pubs.acs.org/doi/10.1021/ja0026…
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Abstract A combined 13 C and 1 H NMR study on borate esters of a series of polyhydroxycarboxylates is presented. 13 C substituent effects upon borate ester formation, as obtained from a set of model compounds, established that borate esters of the threo ‐3,4‐diol functions of gluconate, glucarate, idarate and probably…
The thermal decomposition of solid sodium bicarbonate has been studied in the temperature range 360–500 K over a range of partial pressures of carbon dioxide. The effect of water vapour has also been studied. Above 440 K the reaction follows contracting-cube kinetics with an activation energy of 32 kJ mol–1 and a freq…
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Epiphytic diatoms on the natural seaweeds (seven brown-algae, two red-algae and one green alga) were fractionated by the five step separating treatments of shaking and rubbing. The order of adhesive strength of diatom species was determined from the recovery patterns of each diatom obtained through the five step separ…
The resistance of Type 304L SS to localized corrosion by aqueous chloride solutions is increased by addition of N‐lauroylsarcosine (NLS). The effects of N‐lauroylsarcosine concentration, chloride concentration, p H, and metal surface prepassivation on the efficiency of pitting inhibition were investigated. Linear curr…
A herringbone structure observed in an as arc-melted specimen was investigated using XRD, TEM and surface relief study. The specimen was cooled on a water cooled copper hearth and the grain size was approximately 1 mm. The results confirmed the crystal structure to be tetragonal (at=0.5100 and ct=0.5166 nm, c⁄a=1.0129…
A mullite powder was prepared from aluminum isopropoxide and methyl silicate by coprecipitation using a dilute ammonium aqueous solution. Properties and microstructure of fired bodies were examined. The results were compared with those from a sol mixture (SM) and oxide mixture (OX). The coprecipitated powder (Cp), the…
The mechanism for the dehydroxylation of Keokuk kaolinite, dickite, and nacrite (Al 2 Si 2 O 5 (OH) 4 ) was investigated in detail with the aid of powder X‐ray diffraction, the Rietveld method, and infrared spectroscopy. It was determined that these polymorphic clay minerals dehydroxylate via an inhomogeneous mechanis…
Microcellular polymer foams exhibit greatly improved mechanical properties compared to standard foams due to the formers' small bubble size. Typical microcellular foams have bubbles with diameters on the order of 10 microns and volume reductions of 30 to 40%. The presence of these bubbles acts to increase the impact s…
The dimeric copper(II) carboxylates [{Cu(O2CR)2(H2O)}2] and [{Cu(O2CR)2}2](R = Et or Prn) have been prepared and characterized by means of spectroscopic, magnetic, and thermogravimetric analyses. For [{Cu(O2CEt)2(H2O)}2] the crystal and molecular structure has also been determined. The crystals are monoclinic, space g…