Growth of gallium arsenide in a GaAs-AsCl3-H2 gas-transport system. 2. Growth mechanism

AbstractThe natural gas consumption of the operators connected to the gas transport system depends on the gas needs. As gas needs vary in time, the whole process of gas transportation is, therefore, nonstationary. The paper presents nonstationary simulations for a gas transportation network and highlights the parameters values (flows, pressures) that are necessary to assure the safety of the system.

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Asessment of corrosion fatigue strength of gas-transport system constructions under atmospheric forcing

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/698/2/022077 ◽

2019 ◽

Vol 698 ◽

pp. 022077

Author(s):

N Pirumyan ◽

M Stakyan

Keyword(s):

Fatigue Strength ◽

Transport System ◽

Corrosion Fatigue ◽

Gas Transport ◽

Atmospheric Forcing ◽

Corrosion Fatigue Strength

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Kinetics and growth mechanism of gallium arsenide crystals in gas-phase epitaxy

Soviet Physics Journal ◽

10.1007/bf00895762 ◽

1980 ◽

Vol 23 (1) ◽

pp. 13-24 ◽

Cited By ~ 1

Author(s):

L. G. Lavrent'eva

Keyword(s):

Gallium Arsenide ◽

Gas Phase ◽

Growth Mechanism

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The association of proton movement with galactose transport into subcellular membrane vesicles of Escherichia coli

Biochemical Journal ◽

10.1042/bj2100699 ◽

1983 ◽

Vol 210 (3) ◽

pp. 699-705 ◽

Cited By ~ 10

Author(s):

P Horne ◽

P J F Henderson

Keyword(s):

Escherichia Coli ◽

Transport System ◽

Direct Evidence ◽

Membrane Vesicles ◽

Protonmotive Force ◽

Ph Values ◽

Subcellular Membrane ◽

System 2 ◽

Galactose Transport ◽

Proton Movement

1. Subcellular membrane vesicles were prepared from a strain of Escherichia coli constitutive for the GalP galactose-transport system. 2. The addition of substrates of the GalP transport system to vesicle suspensions promoted alkaline pH changes, which provided direct evidence for the coupling of sugar and proton transport. 3. Respiration-energized galactose transport was progressively inhibited at pH values above 6.0, and was abolished by agents that render the membrane permeable to protons. 4. The combined effects of valinomycin, the nigericin-like compound A217 and pH on galactose transport suggested that both delta pH and delta psi components of the protonmotive force contributed to energization of galactose transport. 5. These results substantiate the conclusion that the GalP transport system operates by a chemiosmotic mechanism.

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2-Deoxy-d-galactose, a substrate for the galactose-transport system of Escherichia coli

Biochemical Journal ◽

10.1042/bj1680015 ◽

1977 ◽

Vol 168 (1) ◽

pp. 15-22 ◽

Cited By ~ 11

Author(s):

P J F Henderson ◽

R A Giddens

Keyword(s):

Escherichia Coli ◽

Transport System ◽

Transport Systems ◽

Mutual Inhibition ◽

E Coli ◽

System 2 ◽

Galactose Transport ◽

Proton Uptake ◽

Inhibition Studies ◽

Lactose Transport

The following observations showed that 2-deoxy-D-galactose is a useful tool for the isolation and elucidation of the activity of one system for galactose uptake into Escherichia coli. 1. 2-Deoxygalactose, which is not a substrate for growth of E. coli, was transported into strains of the organism induced for galactose transport. 2. By using appropriate mutants it was shown that 2-deoxygalactose is a much better substrate for the galactose-transport system than for the methyl galactoside-transport system. This was confirmed by the results of mutual inhibition studies with substrates of each transport system. 3. The glucose-, arabinose- or lactose-transport systems did not effect significant transport of 2-deoxygalactose. 4. Like other substrates of the galactose-transport system, 2-deoxygalactose promoted effective proton uptake into de-energized suspensions of appropriate E. coli strains. 5. The S183 series of E. coli mutants were found to contain a constitutive galactose-transport system, if 2-deoxygalactose transport is used as one criterion for such activity.

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