Showing papers on "Deposition (chemistry) published in 1974"

Deposition and Corrosion in Gas Turbines

Abstract: (1974). Deposition and Corrosion in Gas Turbines. British Corrosion Journal: Vol. 9, No. 1, pp. 2-3.

Continental pleistocene climatic variations from speleothem age and isotopic data.

Abstract: Speleothems from continental North American caves have been dated by means of the 230Th/234U method. Oxygen isotopic variations in the dated samples and phases of speleothem deposition can be interpreted in terms of climatic change. A glacial chronology constructed from the age and isotopic data lends support to the astronomical theory of climatic change.

Method of treatment of calcium disorders using aminoalkane-diophosphonic acids

Abstract: A method for the treatment of diseases relating to the abnormal deposition or dissolution of difficultly soluble calcium salts in the body or mouths of warm-blooded animals which consists of administering orally, parenterally or topically to said warm-blooded animals, a safe but effective amount of at least one pharmacologically acceptable aminoalkane diphosphonic acid derivative or a water-soluble salt thereof.

Intersection Point Deposition on Alluvial Fans: An Australian Example

Abstract: Intersection point deposits occur at the point where the bed of a trench in an alluvial fan merges with the surface of the fan. Such deposition is generally highly periodic, and consequently observations of contemporary deposition are few. Intersection point deposition occurred in January, 1972 on alluvial fans which flank the Lake George scarp. The observations of eyewitnesses indicate that the deposition was the result of a high intensity rainstorm, during which 132 mm of rain was recorded in a little less than 2 hours. Flow in the gullies and on the area of intersection point deposition began as clearwater with low sediment concentration, quickly changed to a turbid flow of mud slurries, and returned to clearwater at the end of the storm. Sieve lobes were formed at an early stage in the deposition, and they consist of the coarsest material available. Each lobe lies just downstream from an intersection point. Sediment transported from the channel after a sieve lobe had been deposited was bifurcated to either side of the lobe. Sieve lobes have only developed in very poorly sorted deposits, and, as a result, there was no bifurcation in well sorted intersection point deposits. There is evidence of similar intersection point deposition prior to that of 1972. On the large alluvial fans the gullies have been lengthening, and periodic intersection point deposition has occurred throughout the period of lengthening. The gullies are incising the fans.

Cainozoic lacustrine stromatolites from hominid-bearing sediments East of Lake Rudolf, Kenya

Abstract: A new occurrence of algal stromatolites from Plio-Pleistocene lacustrine littoral sediments in the Eastern Rift, Kenya is described. These biolithites provide criteria for the interpretation of the environment of deposition of many of the hominids so far collected in the East Rudolf area.

Antarctic glacial history from analyses of ice-rafted deposits in marine sediments: new model and initial tests.

Abstract: Contrasts between the latitudinal distributions of ice-rafted debris deposited in deep-sea sediments during Pleistocene glacial and interglacial periods are predicted by a new model. The model requires the existence of a restricted zone where rates of deposition of ice-rafted debris are essentially independent of glacial-interglacial cycles. Initial tests and published results show that the concept is valid in the Southern Ocean and that it provides a new means of diagnosing major migrations of climatic zones.

Increasing carbohydrate deposition in plants with N-phosphono-methylglycine and derivatives thereof

Abstract: N-phosphonomethylglycine and derivatives thereof useful to increase the carbohydrate deposition in plants.

Calcium deposition in the myxomycete Didymium squamulosum.

Abstract: The deposition of calcium carbonate crystals by the myxomycete Didymium squamulosum during sporulation has been related to mitochondrial electron-dense granules which were determined, by X-ray micr...

Electrolytic burnished gold bath with higher rate of deposition

Abstract: There is provided an electrolytic gold bath for the deposition of thicker, bright gold coatings at high rates of deposition. The bath contains a heterocyclic azohydrocarbon sulfonic acid or salt thereof, e.g. pyridine sulfonic acid.

Oxygen uptake of obliquely deposited Ge films

Abstract: Germanium films, which were obliquely deposited in relatively high pressures of oxygen, were studied with TEM and ESCA. TEM photomicrographs of the films show that large elongated clusters appear as the pressure of oxygen during film deposition increases. The number of these clusters increases as the deposition angle (the angle between the source flux and the substrate plane) decreases. ESCA results indicate that the films consist primarily of Ge and HCl‐soluble GeO2. The amount of oxygen uptake in the films increases as the pressure of oxygen during deposition increases and/or as the deposition angle decreases. These results are important to the understanding of the anomalous photovoltaic effect.

The Absorption of Low Concentrations of Sulphur Dioxide into Aqueous Solutions

Abstract: The rate of deposition of gas-phase SO 2 to a variety of aqueous solutions has been measured. The deposition rate is unaffected by relative humidity. Some salts may cause a 3-fold decrease in deposition rate as the ionic strength changes from 0.1 M to 0.8 M. Solution pH has the greatest influence causing a change from gas-phase diffusion control to solution phase diffusion control of deposition between pH 4 and pH 2. Indirect evidence has been obtained that suggests that the catalysis of SO 2 oxidation in solution by Mn(II) ions is slow with respect to SO 2 diffusion into solution. The practical implications of these results are discussed. DOI: 10.1111/j.2153-3490.1974.tb01977.x

Method of treatment of calcium disorders using phosphonoalkane-polycarboxylic acids

Abstract: A method for the treatment of diseases relating to the abnormal deposition or dissolution of difficutly soluble calcium salts in the body of warm-blooded animals which consists of administering orally, parenterally or topically to said warm-blooded animals, a safe but effective amount of at least one pharmacologically acceptable phosphonoalkane-polycarboxylic acid and water-soluble salts thereof.