Acid Digestion of Radioactive Combustible Wastes
KEYWORDS: radioactive combustible wasteswaste processingvolume reductionacid digestionion exchange resinsorganic waste materialshydrogen peroxide
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The Use of Tetravalent Sulfur in Molten Chloroaluminate Secondary Batteries
A new rechargeable cell Na/Na + ion in molten is described. This cell operates at temperatures in the range of 180°–250°C and has an open‐circuit voltage of 4.2V. The discharge process involves the reduction of tetravalent sulfur to the elemental state; sulfur can be further reduced to sulfide. The preferred sodium io…
Single crystal LaB6 electron gun for variably shaped electron beam optics
A single crystal LaB6 electron gun for variably shaped beams was developed. For the 50 A/cm2 density, 3 μm length maximum beam size, and 1 μA maximum beam current, the best electron gun characteristics were analysed. Optimum brightnesss is 2.5×105 A/cm2 sr. The product of crossover diameter and beam divergence semiang…
Entropy, enthalpy, and side-arm porphyrins. 2. Crystal and molecular structure of a 5-coordinate zinc porphyrin with a four-atom chain attaching the pyridyl ligand to the tetraphenylporphyrin
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEntropy, enthalpy, and side-arm porphyrins. 2. Crystal and molecular structure of a 5-coordinate zinc porphyrin with a four-atom chain attaching the pyridyl ligand to the tetraphenylporphyrinMichael A. Bobrik and F. Ann WalkerCite this: Inorg. Chem. 1980, 19, 11, 3383–3390Pu…
Infrared spectra of matrix-isolated uranium oxides. III. Low-frequency modes
Infrared absorption spectra between 50 and 350 cm−1 have been obtained of argon matrices containing UO3 and UO2. The frequencies of all three expected low-frequency vibrational modes of U16O3 have been identified and measured (±0.1 cm−1): ?3(A1)=186.2, ?5(B1)=211.6, and ?6(B2)=151.5 cm−1. The effects of 18O-substituti…
Crystal and molecular structure of cofacial dicopper hexyldiporphyrin-7
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of cofacial dicopper hexyldiporphyrin-7Marcos H. Hatada, A. Tulinsky, and C. K. ChangCite this: J. Am. Chem. Soc. 1980, 102, 23, 7115–7116Publication Date (Print):November 5, 1980Publication History Published online1 May 2002Published inissue…
Response of Catalyst Surface Concentrations to Forced Concentration Oscillations in the Gas Phase. The NO, CO, O 2 System over Pt-Alumina
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResponse of Catalyst Surface Concentrations to Forced Concentration Oscillations in the Gas Phase. The NO, CO, O2 System over Pt-AluminaL. Louis Hegedus, Charles C. Chang, David J. McEwen, and Elaine M. SloanCite this: Ind. Eng. Chem. Fundamen. 1980, 19, 4, 367–373Publicatio…
Molybdenum(V) tetraphenylporphyrin complexes revisited. Preparation and characterization of oxohydroxo(5,10,15,20-tetraphenylporphyrinato)molybdenum(V), O = Mo(TPP)OH
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolybdenum(V) tetraphenylporphyrin complexes revisited. Preparation and characterization of oxohydroxo(5,10,15,20-tetraphenylporphyrinato)molybdenum(V), O = Mo(TPP)OHHenry J. Ledon, Michel C. Bonnet, Yves Brigandat, and Francois VaresconCite this: Inorg. Chem. 1980, 19, 11,…
Some Observations on the Role of Inclusions in the Hydrogen Induced Blister Cracking of Linepipe Steels in Sulfide Environments
A scanning electron microscope investigation has been conducted on selected line-pipe steels that had been exposed to the hydrogen sulfide in the British Petroleum test. The results show that: (1) Hydrogen induced blister cracking initiates at elongated manganese sulfide inclusions confirming the findings of other wor…
Numerical Evaluation of the State of Cure in a Vulcanizing Rubber Article
Abstract In its present state this model should be effective as an aid in analyzing and optimizing cure cycles for vulcanizing articles. It is clearly necessary to have accurate thermo-physical data when simulating the SOC in thick articles. Additional improvements could be realized by more careful treatment of the he…
An efficient, high conversion photoinduced emulsion polymerization. Magnetic field effects on polymerization efficiency and polymer molecular weight
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn efficient, high conversion photoinduced emulsion polymerization. Magnetic field effects on polymerization efficiency and polymer molecular weightNicholas J. Turro, Ming-Fea Chow, Chao-Jen Chung, and Chen-Ho TungCite this: J. Am. Chem. Soc. 1980, 102, 24, 7391–7393Publicat…
The Elastic Modulus and Fracture of Boron Carbide
Young's modulus at room temperature and the fracture surface energy, up to 1200°C, were determined for boron carbide specimens with 0 to 15% porosity. Sonic modulus measurements indicated that the Young's modulus decreased as porosity increased in a manner characteristic of the cylindrical pore model. The fracture sur…
Liming and Lime‐Phosphorus‐Zinc Interactions in Two Nigerian Ultisols: I. Interactions in the Soil
Abstract Interactions of lime, phosphorus (P), and zinc (Zn) in two coarse‐textured Ultisols from southeastern Nigeria were examined by means of factorial soil incubation and phosphate sorption experiments. In both soils, liming reduced exchangeable aluminum (Al) saturation from 45% to < 5% at pH 5.0 and soil solut…
Benzotriazole a corrosion inhibitor for antiques: Some practical surface chemistry
The structure and inhibitive properties of benzotriazole on copper, copper-based alloys, silver, and other metals.
Cellulosic Insulation Material I. Overall Degradation Kinetics and Reaction Heats
Kinetic studies on the thermal and oxidative decomposition of untreated cellulosic insulation have been carried out with thermal analytical techniques (TGA and DSC) to provide input parameters for smoldering studies of this material. In dry nitrogen, the weight loss proceeds in one overall step that follows a diffusio…
Excess entropies and related quantities in glass-forming liquids
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExcess entropies and related quantities in glass-forming liquidsV. P. PrivalkoCite this: J. Phys. Chem. 1980, 84, 24, 3307–3312Publication Date (Print):November 1, 1980Publication History Published online1 May 2002Published inissue 1 November 1980https://pubs.acs.org/doi/10.…
ENERGY TRANSFER FROM CAROTENOID POLYENES TO PORPHYRINS: A LIGHT‐HARVESTING ANTENNA
Abstract— Carotenoid to porphyrin singlet‐singlet energy transfer has been observed in a new covalently linked carotenoid‐porphyrin ester. Nuclear magnetic resonance studies reveal that the relatively high energy transfer efficiency (˜ 25%) is a result of a stacked conformation in which the 26 π electron carotenoid ch…
Magnetic properties of LaNi5and their variation with hydrogen absorption and desorption
The hydrogen storage compound LaNi 5 is an exchange-enhanced Pauli paramagnet with susceptibility chi (LaNi 5 )=4.6*10 -6 EMU g -1 . Hydrogen absorption leads to a decrease of the susceptibility of chi (LaNi 5 H 6.0 )=1.3*10 -6 EMU g -1 . This decrease is usually covered by a strong irreversible increase of surface ma…
PLANT ROOT GROWTH IN ACID ANDOSOLS FROM NORTHEASTERN JAPAN
Chemical and greenhouse studies were conducted to show that exchange acidity Y1, determined by titration of 125 ml of N KC1 soil extract (soil:N KC1 = 100:250) with 0.1 N NaOH, was a useful, realistic measure of aluminum toxicity potential in acid Andosols from northeastern Japan. Twenty-eight soil samples consisted o…
On the estimation of atomic charges by the X-ray method for some oxides and silicates
Based on accurate X-ray diffraction intensity data collected from spherically shaped single crystals, net atomic charges and electron density distributions have been studied for MnO, Mn2SiO4, Mg2Si2O6, LiAlSi2O6 and CaMgSi2O6. Examination of various procedures for determining atomic charges in a given structure has le…