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"Man muß nur das Material fragen" / "You just have to ask the material"
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Influence ot the curing temperatures on the evolution of the compression strength of concretes made with different typer of cements
In this paper we present the results obtained in the studies carried out on evolution of the compressive strength of identical concretes made with different types of cements based on the spanish standard UNE 80 301 when they are subjected to critical temperatures (5 °C and 35 °C), compared with the same concretes cure…
Editorial
Fachbücher / Reviews
Dynamisch-mechanische Tests (DMT) bei polymeren Werkstoffen / DMT of solid polymers
Titelei
Electrochromic Behavior of Nickel Oxide Electrodes: II . Identification of the Bleached State by Raman Spectroscopy and Nuclear Reactions
Three different types of nickel oxide electrochromic films are colored and bleached in 1 M KOH solution: porous NiO prepared by anodic oxidation of nickel, NiO ( OH ) x obtained by reactive evaporation, and Ni ( OH ) 2 cathodically deposited. Their crystallographic and chemical identification in the colored and bleach…
Is There a Growing Correlation Length near the Glass Transition?
We present the results of a molecular-dynamics study on a Lennard-Jones mixture. Measurements of density and bond-angle correlation functions show that the answer to the question posed in the title is NO. We also show that icosahedral order plays no special role in the glass transition, but that a normalized measure o…
Octahedral occupancy and the chemical composition of diagenetic (low-temperature) chlorites
Abstract The chemical composition of about 500 diagenetic chlorites, determined by electron microprobe, has been studied in six different sedimentary sequences spanning conditions from early diagenesis to low-grade metamorphism, in the temperature range 40–330°C. The range of Fe/(Fe + Mg) is almost complete and is pos…
1991 Whitney Award Lecture: Inhibitors—An Old Remedy for a New Challenge
This lecture initially presents the results of systematic research performed to interpret the mechanisms of corrosion inhibitors in various environments. The behavior of several series of S-containing and N-containing compounds has been investigated by radiochemical, electrochemical, gravimetric, and micrographical te…
The energetics and structure of nickel clusters: Size dependence
The energetics of nickel clusters over a broad size range are explored within the context of the many-body potentials obtained via the embedded atom method. Unconstrained local minimum energy configurations are found for single crystal clusters consisting of various truncations of the cube or octahedron, with and with…
The glass transition of organic liquids confined to small pores
The glass-transition temperatures, Tg, of organic liquids confined to small pores were studied by differential scanning calorimetry (DSC). The Tg was measured as a function of pore size in controlled pore glasses (CPG) having pore diameters in the range of 40–730 Å. The surface of the glass was treated with hexamethyl…
One-step synthesis of hyperbranched dendritic polyesters
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOne-step synthesis of hyperbranched dendritic polyestersC. J. Hawker, R. Lee, and J. M. J. FrechetCite this: J. Am. Chem. Soc. 1991, 113, 12, 4583–4588Publication Date (Print):June 1, 1991Publication History Published online1 May 2002Published inissue 1 June 1991https://pubs…
Hydrophobic effects on simple organic reactions in water
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrophobic effects on simple organic reactions in waterRonald BreslowCite this: Acc. Chem. Res. 1991, 24, 6, 159–164Publication Date (Print):June 1, 1991Publication History Published online1 May 2002Published inissue 1 June 1991https://pubs.acs.org/doi/10.1021/ar00006a001ht…
Transition from “Supercapacitor” to “Battery” Behavior in Electrochemical Energy Storage
The storage of electrochemical energy in battery, "supercapacitor," and double‐layer capacitor devices is considered. A comparison of the mechanisms and performance of such systems enables their essential features to be recognized and distinguished, and the conditions for transition between supercapacitor and "battery…