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。
X-ray photoelectron spectroscopy (XPS) is used to characterize the surface region of a commercial Cu/ZnO/Al 2 O 3 (33/66/1 wt %) catalyst. A systematic study of the effects of oxidation, reduction, and the steam reformation of methanol on the oxidative state of the Cu component is presented. The Zn XPS features show n…
peer reviewed
Pitting corrosion of aluminum alloys is sensitive to the type of surface treatment used prior to a corrosion test. In particular, significant differences in the pitting behavior are observed between the as-received and etched surfaces of several wrought alloys. It is shown that the as-received surface is generally mor…
Using radiation inactivation we determined that p21 ras proteins exhibit an oligomeric target size when assayed both structurally and functionally. Similar target sizes of p21 in ras-transformed cells and in purified preparations of the protein suggested that its structure is homo-oligomeric. p21 monomers were destroy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlyceryl polyphosphazenes: synthesis, properties, and hydrolysisHarry R. Allcock and Sukky KwonCite this: Macromolecules 1988, 21, 7, 1980–1985Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https://pubs.acs.org…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new class of cation conductors: polyphosphazene sulfonatesS. Ganapathiappan, Kaimin Chen, and D. F. ShriverCite this: Macromolecules 1988, 21, 7, 2299–2301Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https:…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEstimation of the Rh-Rh bond dissociation energy in the (octaethylporphyrinato)rhodium(II) dimer by proton NMR line broadeningBradford B. Wayland, Virginia L. Coffin, and Maria D. FarnosCite this: Inorg. Chem. 1988, 27, 15, 2745–2747Publication Date (Print):July 1, 1988Publi…
Abstract A series of new bisbenzocyclobutene‐terminated aromatic imide monomers has been synthesized from the condensation reaction of 4‐aminobenzocyclobutene and the perspective dianhydride in refluxing acetic acid/toluene. The differential scanning calorimetric studies of the foregoing monomers indicated that polyme…
Abstract The mechanical properties of Si 3 N 4 based ceramic bodies are largely controlled by the phases formed on the grain boundaries during sintering. For this reason determination of the state and the chemical composition of the surface of the starting Si 3 N 4 powder is of prime theoretial and practical importanc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEmission characteristics and photostability of N,N'-bis(2,5-di-tertbutylphenyl)-3,4:9,10-perylenebis(dicarboximide)El Zeiny M. Ebeid, Samy A. El-Daly, and Heinz LanghalsCite this: J. Phys. Chem. 1988, 92, 15, 4565–4568Publication Date (Print):July 1, 1988Publication History…
Abstract Regionally extensive, fine-grained dolostones from the Mississippian Burlington-Keokuk Fm. comprise two major generations of dolomite that can be distinguished by their cathodoluminescence, chemical compositions, and times of formation. The petrography and geochemistry of glauconite, the predominant clay mine…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDye sensitization of van der Waals surfaces of tin disulfide photoanodesBruce A. ParkinsonCite this: Langmuir 1988, 4, 4, 967–976Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https://pubs.acs.org/doi/10.1021/l…
Abstract Primary nucleation of poly(vinylidene fluoride) (PVF 2 ) γ‐phase crystals from the melt is affected by the presence of an electric field. Crystallization under the electric field is studied by polarized optical microscopy, thermal analysis, and wide‐angle x‐ray diffraction. Preliminary results indicate that t…
The resonance Raman spectrum obtained from manganese containing argon matrices previously assigned to the dimer [M.Moskovits, D.P.DiLella, and W.Limm, J. Chem. Phys. 80, 626 (1984)] is shown to belong to a zero order D3h trimer subject to Jahn–Teller distortions. The actual resonance Raman spectra of the dimer in both…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel synthesis of aromatic polyamides by palladium-catalyzed polycondensation of aromatic dibromides, aromatic diamines, and carbon monoxideMasaru Yoneyama, Masaaki Kakimoto, and Yoshio ImaiCite this: Macromolecules 1988, 21, 7, 1908–1911Publication Date (Print):July 1, 198…
Abstract The relationships, between chemical structures of various aromatic polyimides and their thermal expansion coefficients, were investigated and the properties of low thermal expansion polyimides were elucidated. Such low values were observed for polyimides obtained from pyromellitic dianhydride or 3,3′,4,4′‐bip…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPathways for carboxylic acid decomposition on titaniaK. S. Kim and M. A. BarteauCite this: Langmuir 1988, 4, 4, 945–953Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https://pubs.acs.org/doi/10.1021/la00082a028…
Al-doped ZnO films were prepared by both RF planar magnetron and RF diode sputterings. The dependence of the ZnO film resistivity on both substrate position and Ar gas pressure was investigated. Energetic oxygen atoms (O atoms) bombarding the film were also observed by time-of-flight apparatus, and the correlation bet…
A density of states diagram for the mobility gap of a-Se is constructed by self-consistent analyses of time-resolved xerographic residual and dark depletion potentials in both undoped and halogen- and alkali-doped Se films. These are then combined with analyses of transient transport data to reveal additional features…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of organosilicon compounds. 240. Pentacoordinate allylsilicates: characterization and highly stereoselective reaction with aldehydesMitsuo. Kira, Kazuhiko. Sato, and Hideki. SakuraiCite this: J. Am. Chem. Soc. 1988, 110, 14, 4599–4602Publication Date (Print):July 1…