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The Eight New Synthetic Elements
In an early continuation of the investigation of the radioactive isotopes of element number 43 (technetium) Segre and Seaborg produced by the deuteron and neutron bombardment of molybdenum the isotope Tc{sup 99}, which they observed to decay by means of an isomeric transition with a half-life of 6.6 hours to a lower isomeric state with a half-life greater than 40 years. The upper isomeric state of this isotope was observed by Segre and C. S. Wu to be produced in the fission of uranium and more recently R. P. Schumann and also D. C. Lincoln and W. H Sullivan working on the Plutonium Project of the Manhattan District have independently observed the beta-particles of half-life about 10 years due to the lower isomeric state. Later work by E. E. Motta and G. E. Boyd sets a more accurate value of 9.4 x 10{sup 5} years for this half-life. Since this isotope is formed in rather large amounts, namely, a fission yield of 6.2%, in the slow neutron induced fission of uranium it is now possible to isolate technetium in weighable amounts and in rather substantial quantities. For example, a uranium pile operating at a power level of 10{sup 5} kw …
Date:
November 1, 1947
Creator:
Seaborg, Glenn T.
Object Type:
Article
System:
The UNT Digital Library
Phosphorus Turnover and Photosynthesis
The participation of phosphorus in biological oxidation-reduction reactions of the type found in glycolysis ADP + PO{sub 4}H{sup -} + 3-phosphoglyceraldehyde + DPN{sup +} = 3-phosphoglycerate{sup -} + 2H{sup +} + DPNH + ATP has suggested theories in which similar reactions are proposed for photosynthesis. In these theories the reducing power of photosynthesis is utilized not only for reduction of carbon dioxide but also, by means of coupled oxidations, for the generation of high-energy phosphate bonds, or in the last reference directly for the generation of high-energy phosphate. Since in these theories acyl phosphate is formed from inorganic phosphate, they are amenable to proof without isolation of particular intermediates, by means of radioactive phosphorus. It would be expected that the rate of conversion of inorganic phosphate to organic phosphate would be greater in light than in the dark. They have investigated this possibility under a variety of conditions and are unable to substantiate the theories.
Date:
November 1, 1947
Creator:
Aronoff, Sam & Calvin, Melvin
Object Type:
Report
System:
The UNT Digital Library
Diffraction Effects in Neutron Attenuation Measurements
All errors due to diffraction effects in a neutron attenuation experiment are computed. Also a special experiment to measure the forward intensity of diffracted neutrons from lead and copper is described, and the results given. These agree with the theoretical values.
Date:
November 1, 1947
Creator:
McMillan, E. M. & Sewell, D. C.
Object Type:
Report
System:
The UNT Digital Library
The El Reno Daily Tribune (El Reno, Okla.), Vol. 56, No. 215, Ed. 1 Monday, November 10, 1947
Daily newspaper from El Reno, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 10, 1947
Creator:
Dyer, Ray J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The El Reno Daily Tribune (El Reno, Okla.), Vol. 56, No. 230, Ed. 1 Thursday, November 27, 1947
Daily newspaper from El Reno, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 27, 1947
Creator:
Dyer, Ray J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The El Reno Daily Tribune (El Reno, Okla.), Vol. 56, No. 229, Ed. 1 Wednesday, November 26, 1947
Daily newspaper from El Reno, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 1947
Creator:
Dyer, Ray J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The El Reno Daily Tribune (El Reno, Okla.), Vol. 56, No. 218, Ed. 1 Thursday, November 13, 1947
Daily newspaper from El Reno, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 13, 1947
Creator:
Dyer, Ray J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The El Reno Daily Tribune (El Reno, Okla.), Vol. 56, No. 224, Ed. 1 Thursday, November 20, 1947
Daily newspaper from El Reno, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 20, 1947
Creator:
Dyer, Ray J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The El Reno Daily Tribune (El Reno, Okla.), Vol. 56, No. 220, Ed. 1 Sunday, November 16, 1947
Daily newspaper from El Reno, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 16, 1947
Creator:
Dyer, Ray J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[Telegram from Martin Neeb to George Beto, November 8, 1947]
Telegram from Professor Martin Neeb to George Beto explaining that Neeb has an engagement in Omaha, Nebraska, on December 14, 1947.
Date:
November 8, 1947
Creator:
Neeb, Martin J.
Object Type:
Text
System:
The Portal to Texas History
[Letter from George Beto to Jack Hixson, November 19, 1947]
Letter from George Beto to Jack Hixson regarding the order of steel lockers.
Date:
November 19, 1947
Creator:
Beto, George John, 1916-1991
Object Type:
Letter
System:
The Portal to Texas History
[Letter from Paul Schulz to George Beto, November 6, 1947]
Letter from Paul Schulz apologizing to George Beto for being unable attend the dedication of a student center at Lutheran Concordia College of Texas.
Date:
November 6, 1947
Creator:
Schulz, Paul
Object Type:
Letter
System:
The Portal to Texas History
[Letter from F. H. Stelzer to George Beto, November 26, 1947]
Letter from Reverend F. H. Stelzer to George Beto regarding an upcoming meeting and funding issues.
Date:
November 26, 1947
Creator:
Stelzer, F. H.
Object Type:
Letter
System:
The Portal to Texas History
[Letter from Paul Schulz to the Boards of Control of the Colleges and Seminaries of the Evangelical Lutheran Synod, November 19, 1947]
Letter from Paul Schultz to the Boards of Control of the Colleges and Seminaries of the Evangelical Lutheran Synod regarding misunderstandings concerning hiring new instructors and building funds.
Date:
November 19, 1947
Creator:
Schulz, Paul
Object Type:
Letter
System:
The Portal to Texas History
[Letter from F. H. Stelzer to Lutheran Concordia College Board of Directors, November 7, 1947]
Letter from F. H. Stelzer to the Lutheran Concordia College Board of Directors thanking them for granting some requests but expressing disappointment for the denial of funding to enlarge a garage and storage building.
Date:
November 7, 1947
Creator:
Stelzer, F. H.
Object Type:
Letter
System:
The Portal to Texas History
[Letter from Harry Williams to George Beto, November 11, 1947]
Letter from Harry C. Kirby to George Beto regarding an order for folding bleachers.
Date:
November 28, 1947
Creator:
Kirby, Harry C.
Object Type:
Letter
System:
The Portal to Texas History
The Denison Press (Denison, Tex.), Vol. 19, No. 20, Ed. 1 Friday, November 7, 1947
Weekly newspaper from Denison, Texas that includes local, state and national news along with advertising.
Date:
November 7, 1947
Creator:
Anderson, LeRoy M.
Object Type:
Newspaper
System:
The Portal to Texas History
The Denison Press (Denison, Tex.), Vol. 19, No. 23, Ed. 1 Friday, November 28, 1947
Weekly newspaper from Denison, Texas that includes local, state and national news along with advertising.
Date:
November 28, 1947
Creator:
Anderson, LeRoy M.
Object Type:
Newspaper
System:
The Portal to Texas History
The Shamrock Texan (Shamrock, Tex.), Vol. 44, No. 29, Ed. 1 Thursday, November 20, 1947
Weekly newspaper from Shamrock, Texas that includes local, state, and national news along with advertising.
Date:
November 20, 1947
Creator:
Montgomery, Arval
Object Type:
Newspaper
System:
The Portal to Texas History
The Shamrock Texan (Shamrock, Tex.), Vol. 44, No. 30, Ed. 1 Thursday, November 27, 1947
Weekly newspaper from Shamrock, Texas that includes local, state, and national news along with advertising.
Date:
November 27, 1947
Creator:
Montgomery, Arval
Object Type:
Newspaper
System:
The Portal to Texas History
The Denison Press (Denison, Tex.), Vol. 19, No. 21, Ed. 1 Friday, November 14, 1947
Weekly newspaper from Denison, Texas that includes local, state and national news along with advertising.
Date:
November 14, 1947
Creator:
Anderson, LeRoy M.
Object Type:
Newspaper
System:
The Portal to Texas History
The Shamrock Texan (Shamrock, Tex.), Vol. 44, No. 27, Ed. 1 Thursday, November 6, 1947
Weekly newspaper from Shamrock, Texas that includes local, state, and national news along with advertising.
Date:
November 6, 1947
Creator:
Montgomery, Arval
Object Type:
Newspaper
System:
The Portal to Texas History
The Shamrock Texan (Shamrock, Tex.), Vol. 44, No. 28, Ed. 1 Thursday, November 13, 1947
Weekly newspaper from Shamrock, Texas that includes local, state, and national news along with advertising.
Date:
November 13, 1947
Creator:
Montgomery, Arval
Object Type:
Newspaper
System:
The Portal to Texas History
The Denison Press (Denison, Tex.), Vol. 19, No. 22, Ed. 1 Friday, November 21, 1947
Weekly newspaper from Denison, Texas that includes local, state and national news along with advertising.
Date:
November 21, 1947
Creator:
Anderson, LeRoy M.
Object Type:
Newspaper
System:
The Portal to Texas History