Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthetic and structural studies of sapphyrin, a 22-.pi.-electron pentapyrrolic "expanded porphyrin"Jonathan L. Sessler, Michael J. Cyr, Vincent Lynch, Ellen McGhee, and James A. IbersCite this: J. Am. Chem. Soc. 1990, 112, 7, 2810–2813Publication Date (Print):March 1, 1990P…
Laser granulometry is a rapid method for determination of particle size distribution in both dry and wet phases. The present paper, diffraction technique by laser beams is an application to the granulometric studies of pozzolanic materials in suspension. Theses granulometric analysis are compared to those obtained wit…
This article studies the influence of addition of different quantities of slag and compares this with the addition of fine particled silica sand. The mortar samples (1:3) of 1 x 1 x 6 cm —prepared with a sulphate-resistent portland cement, mixed with a selected slag and with silica sand were subjected to the action of…
The results of a series of laboratory tests, carried out on the bioclastic limestone used in the construction of the Murcia cathedral, are presented in this paper in order to evaluate the efficiency of certain treatment products, that eventually could be applied to that stone for improving their state of conservation.…
Important factors of deterioration which contribute significately to the worrying state of degradation of the petreous materials in the Cathedral of Seville, essentially those used for ornamental objects, are those of anthropogenic nature which through corrosion mechanisms (chemical deterioration) determine the main m…
Cast duplex stainless steels of CF3, CF8, and CF8M grades, containing a wide range of chemical composition and ferrite content, were aged in the laboratory at 270–450°C to evaluate the kinetics and mechanisms of thermal aging embrittlement. Also, CF8 and CF8A steels were obtained from components of boiling and pressur…
Abstract An overview of the importance of and methods available for heat storage in the form of sensible and latent heat is followed by a discussion of the advantages and disadvantages of reversible thermochemical energy storage compared to conventional energy sources such as fuels, i.e. irreversible chemical energy c…
Abstract The classification and nomenclature of chlorites have been critically reviewed. A new classification based on the unified projection system of chemical composition has been proposed in which for the first time all trioctahedral, di-trioctahedral and dioctahedral species are included. The chemical composition…
The degradation of A1N powder in excess H 2 O at room temperature for up to 24 h was investigated. Samples were characterized by various techniques (IR; XRD; SEM; XPS; C, H, N analysis; surface area, particle size, and weight change measurements). The reaction rate was found to be significant, with 80% of the A1N bein…
Abstract It has been found that by taking transforms of both Gaussian and Lorentzian line shapes into polynomial representations, it is possible in many instances to determine peak position, peak intensity and the full‐width at half‐maximum (FWHM) from wide‐scan XPS spectra that have a low number of data points per el…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural changes associated with the spin transition in bis(isothiocyanato)bis(1,10-phenanthroline)iron: a single-crystal x-ray investigationBernard Gallois, Jose Antonio Real, Christian Hauw, and Jacqueline ZarembowitchCite this: Inorg. Chem. 1990, 29, 6, 1152–1158Publica…
Fracture toughness, K IC , of a single‐phase commercial lead zirconate titanate (PZT) ceramic (Zr/Ti=0.54/0.46) of tetragonal structure ( c/a =1.019) was measured using the single edge notched beam method above and below the Curie temperature. Domain switching (poling) under electrical and mechanical loading was exami…
In recent years, adipocytes obtained by suction-assisted lipectomy have been used for implantation by injection methods. This study is designed to assess the appearance of suctioned and excised adipose tissue and its survival after being injected or implanted into different tissues (0.5 cc into the rectus muscle and 0…
Electrical discharges that do not completely bridge the electrodes are called partial discharges. Although small, these discharges have been known for more than fifty years to cause progressive deterioration. Since 1945 the use of new high voltage dielectrics has required the use of sophisticated detection techniques.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymorphism in melt crystallized syndiotactic polystyrene samplesGaetano Guerra, Vincenzo M. Vitagliano, Claudio De Rosa, Vittorio Petraccone, and Paolo CorradiniCite this: Macromolecules 1990, 23, 5, 1539–1544Publication Date (Print):March 1, 1990Publication History Publis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of di-disubstituted phthalocyaninesJoseph G. Young and William OnyebuaguCite this: J. Org. Chem. 1990, 55, 7, 2155–2159Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue 1 March 1990https://pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopy studies of solvated metal atom dispersed catalysts. Monometallic iron and bimetallic iron-cobalt particles on aluminaBeng Jit Tan, Kenneth J. Klabunde, and Peter M. A. SherwoodCite this: Chem. Mater. 1990, 2, 2, 186–191Publication Date (Print…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of self-doped conducting polyanilineJiang Yue and Arthur J. EpsteinCite this: J. Am. Chem. Soc. 1990, 112, 7, 2800–2801Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue 1 March 1990https://pubs.acs.org/doi/10.1021…