ON THE TEST METHOD FOR RESISTANCE OF CONCRETE TO FREEZING AND THAWING
コンクリートの凍結融解試験方法の動向について述べている。本試験方法のJIS原案は, 日本の試験装置の現状を考慮してASTM C 666とほぼ同様の方法をとってはいるが, 細部については同一のデータが得られるように改められた。また参考試験として, 凍結融解後の長さ変化の測定が取り入れられている。
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Oxidative Hemoglobin Breakdown Induced by a Rubber Additive
An antioxidant commonly present in black rubber, N-isopropyl-N'-phenyl-p-phenylenediamine (IPPD) caused very rapid oxidation and denaturation of purified hemoglobin. In the red cells, the reaction resulted in the formation of Heinz bodies, a decrease in reduced glutathione concentration, and stimulation of the hexose…
Corrosion of Copper Tubes in Fresh Water
This paper reviews the corrosion problems of copper tube experienced in fresh water service. Following three distinct types of corrosion are discussed; (1) dissolution of copper, (2) pitting corrosion, and (3) erosion corrosion.Dissolved copper ion, which may cause green stains by forming insoluble cupric soap or acce…
Studies on the preparation and characterization of the Ce2(SO4)3 · 8(H, D)2O
Abstract Cerium Sulfate octohydrate crystals were crystallized from aqueous solutions under controlled conditions. The solubility measurements were carried out on temperatures between 10 and 80°. Thermoanalytical methods were applied for the study of the thermal behaviour of this compound. Raman spectra of polycrystal…
Electron–electron scattering and the transport properties of liquid potassium
We report the results and interpretation of precision measurements of the thermal conductivity, electrical resistivity, and thermopower of potassium made from just below the melting temperature, 335.5 K, to 700 K. It is found that the Lorenz function is approximately 10% below the Sommerfeld value in the solid state,…
Hydrogen Damage of Nickel-base Heat Resistant Alloys
The damage of nickel-base heat resistant alloys exposed to hydrogen at high temperature and pressure was investigated. Tested materials were mainly Inconel 600, Hastelloy X and nickel. Inconel 600 solution-treated exhibited embrittlement due to the occluded hydrogen. Hastelloy X solution-treated did not exhibit embrit…
Dissolution properties of salt forms of berberine.
The dissolution properties of hydrochloride, sulfate, and iodide salts of berberine were compared. The apparent solubility and dissolution rate of the hydrochloride salt were less than those of the sulfate salt in media resembling GI fluids with respect to pH. The common ion effect on the solubility of berberine hydro…
Guidelines for Corrosion Testing of Titanium
This paper presents guidelines for corrosion testing of titanium with respect to five general modes of corrosion failure that are known to titanium. These modes are general corrosion, crevice corrosion, hydrogen embrittlement, stress-corrosion cracking, and anodic breakdown pitting.
Infrared Emission Spectra of Molten Alkaline Metal Silicates
In order to obtain the vibrational spectra of molten silicates, infrared emission spectra of molten M2O·xSiO2 (M=Li, Na, K, and x=1 to 4 or 5) were measured in the range of wave numbers between 25000 and 400000 m−1 at temperatures 50 K higher than their liquidus.Transmission spectra in the molten state were derived fr…
On the Quantitative Analysis of O<SUP>0</SUP>, O<SUP>−</SUP> and O<SUP>2−</SUP> Ions in Binary Silicate by X-Ray Photoelectron Spectroscopy
Studies by X-ray photoelectron spectroscopy (XPS) have been carried out in order to make clear the structure of vitreous silicate. In a previous paper, three kinds of oxygen ions, i.e. O0, O− and O2−, were analyzed from the O1s XPS spectra for several compositions of lead silicate glass by using an electronic computer…
Enteromorpha, a Marine Alga in Kansas
Enteromorpha Link is primarily a marine genus that has been occasionally reported from inland salt springs and some inland lakes with high salt concentrations (Collins, 1909; Smith, 1950). In contrast to marine species, the mature thalli of most freshwater Enteromorpha consist of long, usually branched, hollow tubes w…
Recent Developments in Environmental Stress-Crack Resistance of Plastics
Plastics may be subjected to mild stress and strain without failure or they may be subjected to weak solvents or aqueous surfactants without failure, but when they are subjected to combination of these two types of variables they often suffer catastrophic brittle fracture. Such failure has been named environmental str…
Mechanical and Physical Properties of Irradiated Type 348 Stainless Steel
A Type 348 stainless steel in-pile tube irradiated to a fluence of 3 × 1022 neutrons/cm2 (E &gt; 1 MeV), 57 displacements per atom, was destructively examined. The service had resulted in a maximum total creep of 1.8 percent at the high fluence. The metal temperature ranged between 623 and 652 K, hence the thermal…
Environmental Cracking of High Strength Maraging Steels: Part I – Aqueous NaCl Solution
Four grades of high strength maraging steel were tested in air and aqueous solutions for susceptibility to stress corrosion cracking and hydrogen embrittlement. Electrochemical methods were used to characterize each alloy and to control the test conditions during slow strain rate tensile tests. Environment sensitive f…
19F nuclear relaxation in an ionic conductor : TlSn2F 5
We have studied the 19F NMR of the TlSn2F5 compound at various temperatures and frequencies. While the measured T1 shows a classical behaviour for T < 358 K, as is generally observed in ionic conductors, it undergoes a sudden increase at T ∼ 358 K corresponding to a change in the crystallographic space group. For high…
Surface modification of synthetic textiles
Conference International Conference on Surface and Colloid Science, International Conference on Surface and Colloid Science, ICSCS, Surface and Colloid Science, Fourth, Jerusalem, Israel, 1981-07-05–1981-07-10 Published Online: 2009-01-01 Published in Print: 1981-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
Recrystallization Temperatures of Dilute Copper Alloys
Effects of certain solute elements on the recrystallization temperature of copper have been studied by X-ray, micro-hardness and electrical resistivity measurements. Specimens of copper alloys containing solute elements of 0.01–0.3 at% were melted and cast in vacuo, and cold rolled to 90% reduction. The recrystallizat…
Stacking faults and twins in kyanite, Al2SiO5
Two types of twins are frequently found in naturally and experimentally deformed kyanite. Structural models based on periodic shears are proposed to account for these mechanical twins. The structure of kyanite is then regarded as layered, the limits of each layer being easy glide planes for dislocations. The shear pla…
Free Energy of Mixing in CaTiO3-Ti2O3-TiO2Melts by Mass Spectrometry
Thermodynamic activity measurements of the components in the CaTiO3-Ti2O3-TiO2 ternary system were performed by differential mass spectrometry at about 2150 K. Observed pressures for gaseous species Ca, TiO and TiO2 were used to calculate Ti, TiO, Ti2O3, TiO2 and CaTiO3 activities in the studied liquid mixtures. These…
Defect structure and the nature of the obstacles for dislocations in NaCl(Ca) crystals
Abstract On the basis of the investigation of the influence of Ca concentration on yield point at different strain rates it is revealed the nature of the obstacles for dislocations overcomed with and without thermal activation.