Properties of light aggregate concrete
No disponible
Materials Literature
文献浏览
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。
Dust nuisance licked by precipitator at leigh's plant
No disponible
Mechanization of the glass industry
No disponible
The new cement factory of Skanska Cementaktiebolaget
No disponible
The relation between strength and free water content of aerated concretes
Dust control
No disponible
Electron Bombardment Conductivity in Diamond. Part II
Previously published results of a study of electron bombardment conductivity in diamond have been revised by the use of an improved alternating field method of internal space-charge neutralization. In addition lower limits are set for the mobilities of electrons and positive holes at room temperature. Measurements hav…
Element 97
NGLE graphite crystals are known to be good conductors along the graphite planes and very poor ones across (ratio of resistivities 104 or higher. '} Coulson' and Wallace' have shown that a graphite crystal along the planes is a semiconductor with zero activation energy, the only difference with a metal consisting in a…
The Effect of Electronic Paramagnetism on Nuclear Magnetic Resonance Frequencies in Metals
Observations on the shifts of nuclear resonances in metals (Id {sup 7}, Na {sup 23}, Ou {sup 63}, Be {sup 9}, Fe {sup 207}, A1 {sup 27} and Oa {sup 69}) due to free electron paramagnetism; comparison with theoretical values.
The crystal structure of hollandite, the related manganese oxide minerals, and α-MnO2
Hollandite cryptomelane, coronadite and alpha-MnO 2 form an isostructural series of the general formula A 2-y B 8-z X 16 , A being large ions such as Ba 2+ , Pb 2+ , and K + , B small and medium-sized ions such as Mn 4+ , Fe 3+ , Mn 2+ , and X in the cases investigated O 2- and OH - ions. The unit cell, which contains…
Dependence of Elastic Properties of Vulcanized Rubber on the Degree of Cross-Linking
Abstract The results reported above demonstrate a progressive increase in the force of retraction τ at fixed elongation with increase in the fraction p of the structural units which are cross-linked from ρ=0.10×10 −2 to 3.0×10 −2 . Over this range, τ at 100 per cent elongation increases about thirteenfold. Swelling me…
A Microcalorimeter Suitable for Study of Easily Absorbed Nuclear Radiations
A microcalorimeter suitable for measuring the energy of easily absorbed nuclear radiations is described. The calorimeter is an isothermal type operating at the temperature of liquid nitrogen and using the rate of vaporization of nitrogen under constant pressure as a measure of the heat input. The calorimeter is fairly…
Carrier-Free Radioisotopes from Cyclotron Targets. VI. Preparation and Isolation of Ag105,106,111 from Palladium
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Herman R. Haymond, Kermit H. Larson, Roy D. Maxwell, Warren M. Garrison, Joseph G. Hamilton; Carr…
Degradation of Cellulose as Revealed Microscopically
Because natural cellulose is fundamentally fibrous, degradation—be it caused by chemical agents such as acids and alkalies, by physical agents such as grinding and ultrasonic vibration, or by biological agents such as molds and bacteria—proceeds in a manner which reflects this basic fibrillate structure. The dimension…
Effect of deuteration, oxidation, and hydrogen-bonding on the infrared spectrum of cellulose
Regenerated cellulose film s were immersed in heavy water (99 .58 % D 20 ) at temperatures up t o 52 C for a s long as 100 hours in an attempt to effect a substitution of D for the H in the OH groups of the ccllulose. The intensity of the OH vibration in t he 3-micron region of the spectrum of t he films decreased ver…
Über das Schmelz‐ und Erstarrungsbild des doppelt‐ternären Systemes (K2 · Na2 · Mg)(Cl2 · SO4)
Abstract Das System der doppelt‐ternären Salzgemische (K 2 · Na 2 · Mg) (Cl 2 · SO 4 ) im Gleichgewicht der möglichen Salze mit Schmelze stellt das Grenzsystem der wässerigen Salzlösung dar, wobei also Schmelze ohne Wasser an dem Auftreten von Flüssigem beteiligt ist. Das Zustandsbild ist, wie vom Verfasser vor Jahren…
TNT INTO PHLOROGLUCINOL
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTNT INTO PHLOROGLUCINOLM. L. Kastens and Julius F. KaplanCite this: Ind. Eng. Chem. 1950, 42, 3, 402–413Publication Date (Print):March 1, 1950Publication History Published online1 May 2002Published inissue 1 March 1950https://pubs.acs.org/doi/10.1021/ie50483a009https://doi.o…
The Vibrational Spectra of Molecules and Complex Ions in Crystals IV. Ammonium Bromide and Deutero-Ammonium Bromide
The infra-red spectra of thin non-scattering films of NH4Br and ND4Br were obtained at 28°C, −78°C and −190°C. The spectra of both compounds in Phase III are in agreement with the x-ray symmetry, D4h7. The torsional oscillation frequencies occur at 319 cm−1 and 230 cm−1 in NH4Br and ND4Br, respectively. The spectra of…
The Vibrational Spectra of Molecules and Complex Ions in Crystals III. Ammonium Chloride and Deutero-Ammonium Chloride
The infra-red spectra of thin non-scattering films of NH4Cl and ND4Cl were obtained at 28°, −78° and −190°C. A convenient low temperature transmission type cell usable for such films is described. No indication of fine structure due to free rotation of the NH4+ ions was found. Instead, evidence is presented for the ex…
Observations on the Thermal Expansion of Crystalline and Glassy Substances
The importance of the reversible thermal expansion of inorganic substances is recognized by metallurgists, glass technologists, and ceramists who deal with manufactured products that are subjected to temperature cycles in service. The temperature interval involved may be small, as in dental porcelain, or large, as in…