Apparatus for fine purification of inert gases from oxygen and water vapor

Atomic Energy ◽  
1960 ◽  
Vol 6 (3) ◽  
pp. 208-210
Author(s):  
N. S. Grachev ◽  
P. L. Kirillov
Keyword(s):  
Water Vapor ◽  
Inert Gases ◽  
Fine Purification

Transformations of neutral particles in the discharge plasma in inert gases with water vapor and deuterium

2018 ◽  
Vol 25 (8) ◽  
pp. 083517 ◽  
Author(s):  
A. V. Bernatskiy ◽  
I. V. Kochetov ◽  
V. N. Ochkin
Keyword(s):  
Water Vapor ◽  
Discharge Plasma ◽  
Inert Gases ◽  
Neutral Particles

scholarly journals Analysis of heat flow in a tube bank of a condenser considering the influence of air

2017 ◽  
Vol 38 (3) ◽  
pp. 119-134
Author(s):  
Magda Joachimiak ◽  
Damian Joachimiak ◽  
Piotr Krzyślak
Keyword(s):  
Water Vapor ◽  
Heat Flow ◽  
Thermal Cycle ◽  
Static Pressure ◽  
Inert Gases ◽  
Inert Gas ◽  
Vapor Flow ◽  
Vapor Mixture ◽  
Flow Conditions ◽  
Tube Bank

Abstract The pressure of wet water vapor inside a condenser has a great impact on the efficiency of thermal cycle. The value of this pressure depends on the mass share of inert gases (air). The knowledge of the spots where the air accumulates allows its effective extraction from the condenser, thus improving the conditions of condensation. The condensation of water vapor with the share of inert gas in a model tube bank of a condenser has been analyzed in this paper. The models include a static pressure loss of the water vapor/air mixture and the resultant changes in the water vapor parameters. The mass share of air in water vapor was calculated using the Dalton’s law. The model includes changes of flow and thermodynamic parameters based on the partial pressure of water vapor utilizing programmed water vapor tables. In the description of the conditions of condensation the Nusselts theory was applied. The model allows for a deterioration of the heat flow conditions resulting from the presence of air. The paper contains calculations of the water vapor flow with the initial mass share of air in the range 0.2 to 1%. The results of calculations clearly show a great impact of the share of air on the flow conditions and the deterioration of the conditions of condensation. The data obtained through the model for a given air/water vapor mixture velocity upstream of the tube bank allow for identification of the spots where the air accumulates.

The effect of water vapor and inert gases on the carbon-oxygen reaction

Carbon ◽  
1987 ◽  
Vol 25 (6) ◽  
pp. 783-789 ◽  
Author(s):  
S. Ahmed ◽  
M.H. Back
Keyword(s):  
Water Vapor ◽  
Inert Gases ◽  
Effect Of Water ◽  
Oxygen Reaction

Study of the glow discharge in inert gases with water vapor

2017 ◽  
Vol 44 (5) ◽  
pp. 147-150 ◽  
Author(s):  
A. V. Bernatskiy ◽  
V. N. Ochkin ◽  
I. V. Kochetov
Keyword(s):  
Water Vapor ◽  
Glow Discharge ◽  
Inert Gases

Biological method for fine purification of nitrogen and inert gases from O2 traces

1981 ◽  
Vol 68 (6) ◽  
pp. 329-330 ◽  
Author(s):  
B. B. Vartapetian ◽  
Y. S. Bobylev
Keyword(s):  
Inert Gases ◽  
Biological Method ◽  
Fine Purification

New Design for a Differentially Pumped Hydration Chamber for a Siemens IA

1971 ◽  
Vol 29 ◽  
pp. 44-45
Author(s):  
R. C. Moretz ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Electron Microscopy ◽  
Water Vapor ◽  
Electron Diffraction ◽  
Water Vapor Pressure ◽  
Biological Materials ◽  
Thin Membrane ◽  
Reliable System ◽  
System A ◽  
Water Films ◽  
Aperture Opening

Electron microscopy and diffraction of biological materials in the hydrated state requires the construction of a chamber in which the water vapor pressure can be maintained at saturation for a given specimen temperature, while minimally affecting the normal vacuum of the remainder of the microscope column. Initial studies with chambers closed by thin membrane windows showed that at the film thicknesses required for electron diffraction at 100 KV the window failure rate was too high to give a reliable system. A single stage, differentially pumped specimen hydration chamber was constructed, consisting of two apertures (70-100μ), which eliminated the necessity of thin membrane windows. This system was used to obtain electron diffraction and electron microscopy of water droplets and thin water films. However, a period of dehydration occurred during initial pumping of the microscope column. Although rehydration occurred within five minutes, biological materials were irreversibly damaged. Another limitation of this system was that the specimen grid was clamped between the apertures, thus limiting the yield of view to the aperture opening.

Hydration Chamber for Jeolco 200 Kv Microscope

1970 ◽  
Vol 28 ◽  
pp. 542-543
Author(s):  
V. R. Matricardi ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Electron Microscope ◽  
Water Vapor ◽  
Vapor Pressure ◽  
Pressure Gradient ◽  
Room Temperature ◽  
List Type ◽  
Type Number ◽  
Equilibrium Vapor Pressure

In order to observe room temperature hydrated specimens in an electron microscope, the following conditions should be satisfied: The specimen should be surrounded by water vapor as close as possible to the equilibrium vapor pressure corresponding to the temperature of the specimen.The specimen grid should be inserted, focused and photo graphed in the shortest possible time in order to minimize dehydration.The full area of the specimen grid should be visible in order to minimize the number of changes of specimen required.There should be no pressure gradient across the grid so that specimens can be straddled across holes.Leakage of water vapor to the column should be minimized.

Warm and freeze-fracture of cotton seed radicles

1987 ◽  
Vol 45 ◽  
pp. 984-985
Author(s):  
E. L. Vigil ◽  
E. F. Erbe
Keyword(s):  
Thin Film ◽  
Water Vapor ◽  
Fracture Surface ◽  
Membrane Structure ◽  
Room Temperature ◽  
Freeze Fracture ◽  
Longitudinal Axis ◽  
Fracture Plane ◽  
Cotton Seeds ◽  
Condensed Water

In cotton seeds the radicle has 12% moisture content which makes it possible to prepare freeze-fracture replicas without fixation or cryoprotection. For this study we have examined replicas of unfixed radicle tissue fractured at room temperature to obtain data on organelle and membrane structure.Excised radicles from seeds of cotton (Gossyplum hirsutum L. M-8) were fractured at room temperature along the longitudinal axis. The fracture was initiated by spliting the basal end of the excised radicle with a razor. This procedure produced a fracture through the tissue along an unknown fracture plane. The warm fractured radicle halves were placed on a thin film of 100% glycerol on a flat brass cap with fracture surface up. The cap was rapidly plunged into liquid nitrogen and transferred to a freeze- etch unit. The sample was etched for 3 min at -95°C to remove any condensed water vapor and then cooled to -150°C for platinum/carbon evaporation.

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