Photoelectrochromic Behavior of Prussian Blue‐Modified TiO2 Electrodes
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Materials Literature
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IRT versus Conventional Equating Methods: A Comparative Study of Scale Stability
Nancy S. Petersen, Linda L. Cook, Martha L. Stocking, IRT versus Conventional Equating Methods: A Comparative Study of Scale Stability, Journal of Educational Statistics, Vol. 8, No. 2 (Summer, 1983), pp. 137-156
Photoreduction of polymolybdates(VI) in aqueous solutions containing acetic acid
Polymolybdates(VI) have been photochemically reduced to Mov in aqueous solutions containing acetic acid. Carbon dioxide, methane, and succinic acid were isolated as decomposition products of the acetic acid but the quantum yield of their formation was ca. 20 times smaller than that of Mov formation. E.s.r, spin-trappi…
Mechanisms of the Microbial Corrosion of Aluminum Alloys
Pitting potential was used recently to asses the aggressiveness of the biological species in the microbial corrosion of aluminum alloys in fuel-water systems. This parameter is analyzed here in relation to the electrolyte composition of the medium, especially with reference to chloride, nitrate, and phosphate levels.…
New Liquid Crystal Materials; Physical Properties and Performance in Displays for Automobile, High Information Density and Guest-host Applications
Four novel liquid crystal classes are presented, namely bi-, tri-, and tetracyclic ethanes, pyridazines, and tetracyclic chloro-diesters. Each class exhibits distinct physical characteristics, such as low viscosities η − 12 cP, low elastic ratios k33/k11 ∼ 1, large mesomorphic ranges −40°C. 250°C, large negative diele…
Spin Equilibria in Some New cis-Diisothiocyanato Iron(II) Complexes with Tetradentate Ligands of the Tris(2-pyridylmethyl)amine Type.
Les etats de spin de plusieurs complexes de fer(II) ont ete caracterises a partir de la variation de la susceptibilite magnetique entre 4 et 300 K
Additivity of simultaneous masking
Simultaneous masking functions (signal level at threshold versus masker level) were obtained for equally intense maskers presented individually and in pairs. The signal was a 2.0-kHz sinusoid. The pairs of maskers were (1) two sinusoids with frequencies 1.9 and 2.1 kHz, (2) two narrow bands of noise (50 Hz wide) cente…
The influence of thermal properties on the glass transition temperature in styrene/divinylbenzene network–diluent systems
Abstract The depression of glass transition temperature in polystyrene and styrene/divinylbenzene networks, by the addition of ethylbenzene, ethyl acetate, and m ‐diethylbenzene, respectively, has been investigated by differential scanning calorimetry. The predictive quality of the Couchman–Karasz treatment for the co…
The inelastic scattering matrix element and its application to electron energy loss spectroscopy
Using a simple hydrogenic scattering model, the matrix element with full phase information is derived for the ejection of K-shell electrons from atoms by an energetic electron beam. The scattering kinematics are defined and polar diagrams of the angular dependence of the ejected electron intensity are presented. The e…
Excitation-energy dependence of the photoluminescence total-light decay in arsenic chalcogenides
Previous measurements of transient photoluminescence (PL) in a-As2S3 have indicated that the PL spectrum is extremely sensitive to the excitation photon energy. In the present paper we show that this sensitivity is also manifest in the total-light decay (TLD), the spectrally integrated PL intensity as a function of ti…
Nitrogen Ceramics: Liquid Phase Sintering
The role of a minor silicate eutectic liquid phase as a transport medium in sintering hot–pressed silicon nitride (β Si3N4) ceramics was identified in the 1970s. A similar mechanism is applicable to hot–pressed Si–Al–O–N ceramic alloys which offer an advantage in control of the final liquid volume and hence in superio…
Neutral-ionic transitions in organic mixed-stack compounds
Torrance et al. have made the interesting observation that several mixed-stack organic compounds undergo transitions from neutral states to ionic states as the temperature or pressure is varied. We examine a simple model of such transitions including Coulomb interaction and hybridization of neutral and ionic states. I…
Studies on the constituents of asclepiadaceae plants. LVI. Isolation of new antitumor-active glycosides from Dregea volubilis (L.) Benth.
Seven new glycosides were isolated from the stem of Dregea volubilis (L.) BENTH. The structures of dregeosides Ap1 (1), Ao1 (2), Aa1 (3), A11 (4), C11 (5), Ka1 (6), and Ka1 (7) were deduced on the basis of chemical and spectral evidence as drevogenin A 3-O-3-O-methyl-6-deoxy-β-D-allopyranosyl-(1→4)-β-D-oleandropyranos…
Intraarterial Cis -Platinum Chemotherapy for Patients with Primary and Metastatic Brain Tumors
A total of 49 patients were treated using intraarterial cis-platinum infusions at a dose of 100 mg/m2. The patients were separated into three groups. There were 13 patients with metastatic tumors, 10 with recurrent malignant gliomas, and 22 patients with high-grade gliomas who received intraarterial cis-platinum as pa…
Olefin epoxidation by a mono-oxygenase model. Effect of site isolation
Anchoring of (tetraphenylporphinato)manganese(III) acetate to a rigid polymer support considerably enhances the rate of cyclohexene epoxidation by this catalyst.
Processing Ternary Sulfide Ceramics: Powder Preparation, Sintering, and Hot‐Pressing
Ceramic processing of various AB 2 S 4 sulfides with the Th 3 P 4 , CaFe 2 O 4 , and spinel structure types was investigated. These refractory sulfides show good sinterability when fired in flowing H 2 S. They can be densified by a combination of hot‐pressing and hot isostatic pressing into theoretically dense ceramic…
Molten Carbonate Fuel Cell Performance Model
A two‐dimensional numerical model is developed to simulate nonisothermal performance of molten carbonate fuel cells. The model takes account of gas stream utilization due to electrochemical reaction, conductive heat transfer between cell hardware and gas streams, energy transfer accompanying mass addition to the bulk…
An Application of Pure Titanium to the Metal Porcelain System
The purpose of this study is to investigate the feasibility of pure titanium to the metal-porcelain system.Since thermal expansion coefficient of pure titanium was 9.41×10-6/°C (100-400°C) and was considerably smaller than those of the conventional alloys for porcelain, a porcelain having the thermal expansion coeffic…
What is a Metal?
A survey is given of simple predictive models and operational definitions of the metallic state. The purpose of this work is to highlight the essential features of electron localization versus itinerancy in both crystalline and disordered materials. Particular attention is given to systems that not only extend to the…
Both-faces hindered porphyrins. Part 1. Synthesis and characterization of basket-handle porphyrins and their iron complexes
The synthesis of the ‘both-faces’ hindered porphyrins using two different methods is reported. These so-called ‘basket-handle’ porphyrins (BHP) are derived from 5,10,15,20-tetraphenylporphyrin in which two opposite phenyl groups are bridged by alkylene or arylene-p-bisalkylene chains. In addition to the desired compou…