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CYANAMIDE: A POSSIBLE KEY COMPOUND IN CHEMICAL EVOLUTION
The prebiotic synthesis of phosphorus-containing compounds--such as nucleotides and polynucleotides--would require both a geologically plausible source of the element and pathways for its incorporation into chemical systems on the primitive Earth. The mineral apatite, which is the only significant source of phosphate on Earth, has long been thought to be problematical in this respect due to its low solubility and reactivity. However, in the last decade or so, at least two pathways have been demonstrated which would circumvent these perceived problems. In addition, recent results would seem to suggest an additional, extraterrestrial source of reactive phosphorus. It appears that the 'phosphorus problem' is no longer the stumbling block which it was once thought to be.
Date:
May 1, 1964
Creator:
Steinman, Gary; Lemmon, Richard M. & Calvin, Melvin
System:
The UNT Digital Library
In-reactor corrosion: A paper presented at the 9th annual AEC Corrosion Symposium, Boston, Massachusetts, May 10--12, 1960
Object of this paper is to present preliminary results of experiments in Hanford in-reactor loops to determine if exposure to neutrons will increase corrosion rates of Al alloys, Zy-2, and 304 stainless steel. Results were negligible or no corrosion.
Date:
May 9, 1960
Creator:
Larrick, A. P.
System:
The UNT Digital Library
Isobaric-spin splitting of nuclear excitations
None
Date:
May 1, 1966
Creator:
Macfarlane, M H
System:
The UNT Digital Library
BINDING ENERGIES OF NUCLEAR TWO, THREE AND FOUR-BODY SYSTEMS
None
Date:
May 1, 1965
Creator:
Tang, Y.C.; Schmid, E.W. & Herndon, R.C.
System:
The UNT Digital Library
CONSIDERATIONS ON THE DISTRIBUTION OF IONS BETWEEN AN ORGANIC SOLUTION OF ALKYL-AMMONIUM SALTS AND AN AQUEOUS SOLUTION OF INORGANIC SALTS IN THE PRESENCE OF HOMOPOLYMERS AND HETEROPOLYMERS IN THE ORGANIC PHASE
None
Date:
May 1, 1966
Creator:
Scibona, G.
System:
The UNT Digital Library