scholarly journals Two-phase equilibrium and molecular hydrogen formation in damped Lyman-alpha systems

2002 ◽  
Vol 389 (2) ◽  
pp. 393-404 ◽  
Author(s):  
H. Liszt
Keyword(s):  
Phase Equilibrium ◽  
Molecular Hydrogen ◽  
Hydrogen Formation ◽  
Two Phase ◽  
Lyman Alpha ◽  
Damped Lyman Alpha Systems

scholarly journals The Star Formation History of Damped Lyman-Alpha Systems

2005 ◽  
Vol 13 ◽  
pp. 572-577
Author(s):  
Arthur M. Wolfe
Keyword(s):  
Star Formation ◽  
Star Formation History ◽  
Heating Rates ◽  
Two Phase ◽  
Lyman Alpha ◽  
Lyman Break Galaxies ◽  
Formation History ◽  
Phase Medium ◽  
History Of ◽  
Damped Lyman Alpha Systems

AbstractThe C II* technique for measuring star formation rates (SFRs) in damped Lya systems (DLAs) is described. We measure cooling rates of the gas from the strength of C II* 1335.7 absorption lines, and infer heating rates by assuming the gas is heated by the grain photoelectric mechanism. Since the heating rates depend on the intensity of FUV radiation, we deduce the SFRs per unit area, which are comparable to the value in the Milky Way disk. From DLA statistics we obtain the SFRs per unit comoving volume at z=[1.6,4.5], which are similar to the rates in Lyman Break Galaxies. Implications such as the presence of a two-phase medium, metal production, and feedback processes are described. The model is tested and found to be consistent with observations.

Phase Equilibrium of Mg-Nd-Zn System near Mg-Nd Side at 400°C

2016 ◽  
Vol 873 ◽  
pp. 18-22
Author(s):  
Ming Li Huang ◽  
Xue Shen ◽  
Hong Xiao Li
Keyword(s):  
Solid Solution ◽  
Phase Equilibrium ◽  
Ternary Isothermal Section ◽  
Phase Region ◽  
X Ray Diffraction ◽  
Maximum Solubility ◽  
Two Phase ◽  
Solubility Range ◽  
Three Phase ◽  
Equilibrium Alloys

The equilibrium alloys closed to Mg-Nd side in the Mg-rich corner of the Mg-Zn-Nd system at 400°C have been investigated by scanning electron microscopy, electron probe microanalysis and X-ray diffraction. The binary solid solutions Mg12Nd and Mg3Nd with the solubility of Zn have been identified. The maximum solubility of Zn in Mg12Nd is 4.8at%, and Mg12Nd phase can be in equilibrium with Mg solid solution. However, only when the solubility range of Zn in 26at%~32.2at%, Mg3Nd can be in two-phase equilibrium with Mg solid solution. As the results, two two-phase regions as Mg+Mg12Nd and Mg+Mg3Nd and a three-phase region as Mg+Mg12Nd+Mg3Nd in Mg-Nd-Zn ternary isothermal section at 400°C have been identified.

scholarly journals EFFECTS OF VARYING THE THREE-BODY MOLECULAR HYDROGEN FORMATION RATE IN PRIMORDIAL STAR FORMATION

2010 ◽  
Vol 726 (1) ◽  
pp. 55 ◽  
Author(s):  
Matthew J. Turk ◽  
Paul Clark ◽  
S. C. O. Glover ◽  
T. H. Greif ◽  
Tom Abel ◽  
...  
Keyword(s):  
Star Formation ◽  
Molecular Hydrogen ◽  
Formation Rate ◽  
Hydrogen Formation ◽  
Three Body

scholarly journals Molecular Hydrogen Formation by Escherichia Coli Hydrogenase 3 during Fermentation of Glucose at Slightly Acidic pH

2011 ◽  
Vol 100 (3) ◽  
pp. 488a
Author(s):  
Anna Poladyan ◽  
Anna Poghosyan ◽  
Karen Trchounian ◽  
Armen Trchounian
Keyword(s):  
Escherichia Coli ◽  
Molecular Hydrogen ◽  
Acidic Ph ◽  
Hydrogen Formation ◽  
Hydrogenase 3

scholarly journals Two-phase equilibrium in binary and ternary systems II. The system methane-ethylene III. The system methane-ethane-ethylene

1940 ◽  
Vol 176 (964) ◽  
pp. 140-152 ◽  
Keyword(s):  
Phase Equilibrium ◽  
Ternary System ◽  
Binary Systems ◽  
Ternary Systems ◽  
Two Phase ◽  
Composition Diagram ◽  
Wide Range ◽  
Binary And Ternary Systems

The liquid-vapour equilibrium of the system methane-ethylene has been determined at 0, -42 , -78, -88 and -104° C over a wide range of pressures and the results are shown on a pressure-composition-temperature diagram and by a series of pressure-composition curves. The liquid-vapour equilibrium of the ternary system methane-ethane-ethylene has been determined at -104, -78 and 0° C. Values for the two binary systems methane-ethane and methane-ethylene and for the ternary system methane-ethane-ethylene are shown on a composite pressure-composition diagram.

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