Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
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…
Glasses were prepared over a wide range of composition in the system Li2O-B2O3 using a rapid quenching technique. The glass-forming region was extended up to the composition of 70mol% Li2O. Raman spectra of the glasses were measured; drastic spectral changes were observed in the glasses containing more than 50mol% Li2…
X-ray studies of orthorhombic- I tridymite, especially focussed on atomic mean-square displacements (m.s.d.'s) at 443, 493, 573, 653 and 693 K respectively, were carried out on the basis of the usual second-order refinement of the Dollase model. The m.s.d.'s for O are highly anisotropic, and large in the planes perpen…
Abstract Rubinrote Kristalle der Verbindung Na 5 FeS 4 lassen sich durch Umsetzung von Natriumsulfid mit Eisen und Schwefel bei 970 K darstellen. Röntgenographische Strukturuntersuchungen an einem Einkristall führten zu einer dem ternären Oxid Na 5 GaO 4 entsprechenden Atomanordnung [1]. Na 5 FeS 4 kristallisiert rhom…
The desmoplastic response to breast carcinoma is being studied. The stimulation of stromal cell proliferation by a preformed breast tumor matrix was shown. An additional mechanism for stimulating scleroprotein deposition is described here. On a per-cell basis, the synthesis of collagen and elastin was increased by 50%…
The unusual electrical properties of certain inorganic compounds which behave as quasi-one-dimensional metals are reviewed, with emphasis on the evidence which they provide for conduction by the cooperative mechanism, involving the motion of incommensurate charge-density waves (CDWs), first suggested by Frohlich (1954…
Particle-initiated breakdown characteristics in SF6 gas are investigated. Breakdown voltages are greatly influenced by particle diameter especially for AC voltages, and for very fine metallic wire particles are much higher than those for moderately thick ones. The breakdown stress of a gas gap is obtained as a functio…