منابع مشابه
Origin and evolution of ore-forming fluids in the magnetite±apatite Lake Siah deposit (Bafq): Evidence of fluid inclusions and oxygen stable isotope
The Lake Siah magnetite ± apatite deposit is situated in the northeastern of Bafq and Central Iran tectonic zone. The host rock of deposit is composed from lower Cambrian volcano-sedimentary sequence that has exposed as caldera complex. The iron mineralization is as massive ore and includes magnetite and hematite which form with apatite, quartz and calcite gangue minerals. Based on fluid inclus...
متن کاملThe Effect of Oxygen Tension on the Oxygen Uptake of Lake Bacteria.
Many studies have been made on the influence of oxygen tension upon the growth and activity of various organisms (Amberson, 1928, Hyman, 1929), but relatively few measurements of oxygen consumption have been made. Although it is generally agreed that most bacteria have definite oxygen optima for multiplication and for certain physiological activities, no generalizations can be made from the fra...
متن کاملOxygen Absorption in Cooling Flows.
The inhomogeneous cooling flow scenario predicts the existence of large quantities of gas in massive elliptical galaxies, groups, and clusters that have cooled and dropped out of the flow. Using spatially resolved, deprojected X-ray spectra from the ROSAT PSPC, we have detected strong absorption over energies approximately 0.4-0.8 keV intrinsic to the central approximately 1&arcmin; of the gala...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
EFFECT OF DEPOSIT FEEDERS ON MIGRATION OF 13 7 Cs IN LAKE SEDIMENTS
IIlite clay particles with adsorbed 137Cs were added as a submillimeter layer to the surface of stir-clay sediments contained in rectangular Plexiglas ceils stored in a temperature-regulated aquarium, in order to tmee the effect of the ollgochaete, Tubifex tubifex, and the amphipod, Pontoporeia hoyi, on mass redistribution near the sedimentwater interface. A well-collimated NaI gamma detector s...
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ژورنال
عنوان ژورنال: Proceedings of the Imperial Academy
سال: 1934
ISSN: 0369-9846,1881-1140
DOI: 10.2183/pjab1912.10.236