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Suplemento al Centinela
Communication from Anastasio Sierra defending the right of Tamaulipas to be a state. This communication is written on the back of the document in the bottom right corner; this document is printed as a "Suplemento al Centinela."
Date:
February 7, 1824
Creator:
unknown
System:
The Portal to Texas History
[Clipping: Sweetwater Man Cited for Enviable War Work Record]
Reprint of an article published in the Sweetwater Daily Reporter about Sam Myres being honored by the U. S. Government due to the quality of his saddles that he made for the war, which were of such high quality that it made inspection unnecessary.
Date:
February 19, 1920
Creator:
Sweetwater Daily Reporter
System:
The Portal to Texas History
[Article over Refugee Physicians Reprinted from Modern Medicine]
Two articles detailing refugee physicians in America and the difficulties that arise for them and for the communities they try to integrate themselves in.
Date:
February 13, 1939
Creator:
Modern Medicine
System:
The Portal to Texas History
WASP_03-2016-015-210
Copies of three articles on thunderstorms as they relate to aviation by Robert N. Buck, taken from the magazine, Air Facts, and compiled by the contract pilot school at Avenger Field for the use of its students.
Date:
February 11, 1944
Creator:
Buck, Robert N.
System:
The Portal to Texas History
Degradation of Isotopic Lactate and Acetate
A scheme of glucose degradation has been validated by the use of intermediates of known isotopic composition. In this scheme: glucose {yields} lactic acid {yields} CO{sub 2} (C-3,4) + acetic acid {yields} CO{sub 2} (C-2,5) + acetone {yields} iodoform (C-1,6) + acetate (C-1,6; 2,5), it was found that (a) in the oxidation of lactic acid, approximately 4.7% of the acetic acid was oxidized to CO{sub 2}; and (b) under the conditions prescribed, BaCO{sub 3} from the degradation of Ba acetate contained approximately 1.5% of the activity of the methyl group.
Date:
February 24, 1948
Creator:
Aronoff, S.; Haas, V. A. & Fries, B. A.
System:
The UNT Digital Library
A Clinician's View of Medical Education
Article reprinted from the Texas State Journal of Medicine, discussing issues in medical education, such as a recent decline in applicants, teacher shortage, finances, and surgeon training.
Date:
February 1960
Creator:
Hartman, Albert W.
System:
The Portal to Texas History
Serology of Aerobic Aquatic Actinomycetes I. Factors Involved in Antiserum Production and In Vitro Antigen-Antibody Reactions
Article on the serology of aerobic aquatic actinomycetes and factors involved in antiserum production and in vitro antigen-antibody reactions.
Date:
February 23, 1962
Creator:
Guthrie, R. K.; Roach, A. W. & Ferguson, J. K.
System:
The UNT Digital Library
BETA-RAY SPECTROMETER WITH REDUCED SPHERICAL ABERRATION
Modern {beta}-ray spectrometers are based upon the concept, first introduced by Svartholm and Siegbahn in 1946, of focusing in both the radial and vertical directions. The theory of axially symmetric devices has been carefully studied by a large number of workers, culminating in the analysis, in 1956, of Lee-Whiting and Taylor. These last authors calculate aberrations through the sixth order and show that by appropriate choice of the magnetic field a spectrometer can be designed with a relatively large transmission and a high resolution. The acceptable transmission is remarkable because the second-order 'spherical' aberration in the median plane of the image cannot be made to vanish identically, and consequently the design is forced to a tall thin aperture (or a slightly less advantageous short wide aperture) which a priori would seem to imply a low transmission. It is the purpose of this communication to show that if the arbitrary restriction to axially symmetric fields is removed, then both the radial and the vertical contributions to the 'spherical' aberration can be made to vanish in second order. That azimuthally varying field (AVF) afford the freedom to accomplish this end may well be suspected in view of the technological revolution that the …
Date:
February 4, 1963
Creator:
Sessler, Andrew M.
System:
The UNT Digital Library
Serology of Aerobic Aquatic Actinomycetes
Article on the serology of aerobic aquatic actinomycetes.
Date:
February 13, 1963
Creator:
Guthrie, R. K.; Roach, A. W. & Ferguson, J. K.
System:
The UNT Digital Library
OXYGEN-17 NMR SHIFTS CAUSED BY Cr$sup ++$ IN AQUEOUS SOLUTIONS
Cr{sup++} in solution produces a paramagnetic shift in the NMR absorption of 0{sup17} in C1O{sub4}{sup-}, as well as the expected paramagnetic shift for 0{sup17} in H{sub2}O. As the concentration of C1O{sub4}{sup-} increases, the shift in the H{sub2}O{sup17} absorption is diminished, and eventually changes sign. The effects are ascribed to preferential replacement by C1O{sub4}{sup-} of water molecules from the axial positions in the first coordination sphere about Gr{sup++}.
Date:
February 15, 1963
Creator:
Jackson, J.A.; Lemons, J.F. & Taube, H.
System:
The UNT Digital Library
Absolute Decay Rate from K<sub>2</sub><sup>0</sup>→π<sup>+</sup> + π<sup>-</sup> + π<sup>0</sup> and the barDELTA I over→bar = 1/2 Rule
In this letter the author describes a measurement of the absolute decay rate {Gamma}{sub 2}({+-}0) {approx_equal} {Gamma}(K{sub 2}{sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0}). The result is based on 16 events of the type {pi}{sup -} p {yields} {Lambda}K{sup 0} followed by {Lambda} {yields} p{pi}{sup -} and K{sub 2}{sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0}, and 2608 double-vec events {pi}{sup -} p {yields} {Lambda}K{sup 0} with {Lambda} {yields} p{pi}{sup -} and K{sub 1}{sup 0} {yields} {pi}{sup +}{pi}{sup -}.
Date:
February 4, 1964
Creator:
Stern, Donald; Binford, Thomas O.; Lind, V. Gordon; Anderson, Jared A.; Crawford, Jr, Frank S. & Golden, Robert L.
System:
The UNT Digital Library
An Automatic Lithium Drifting Apparatus for Silicon and Germanium Detectors
Drifting a thick lithium-drifted counter (silicon and germanium) is a time-consuming operation that frequently results in a poor device, owing to inadequate knowledge of progress of the drifting operation. The drifting apparatus described here automatically controls the temperature of the detector that is being drifted to maintain the leakage current at a preselected value. While drifting proceeds, a continuous measurement is made of the distance of the lithium-drifted region from the opposite face of the wafer. When the drifted region reaches 30 mil or less from the back of the wafer a meter indicates the thickness of the undrifted region and, when this thickness falls below a preselected value, the temperature of the detector is automatically reduced to room temperature. The need for constant supervision of the drifting operation is thereby eliminated, and reliance on theoretical drift-rate calculations to predict the drift-through time is avoided. The technique has been applied to the manufacture of lithium-drifted silicon detectors with excellent results. The application of the technique to lithium-drifted germanium {gamma} detectors is also discussed briefly.
Date:
February 8, 1964
Creator:
Goulding, Fred S. & Hansen, W. L.
System:
The UNT Digital Library
Planar Dynode Multipliers for High-Speed Counting
None
Date:
February 26, 1964
Creator:
Sapp, W. W. & Sternglass, E. J.
System:
The UNT Digital Library
HIGH-TEMPERATURE THERMOMETRY AT CANEL
None
Date:
February 1, 1965
Creator:
Bliss, P.
System:
The UNT Digital Library
PHOTOSENSITIZED IONIZATION OF ALKALI METAL VAPORS
The vapors of potassium, rubidium, and cesium have been photoionized with light absorbed in the discrete region of the atomic spectrum. The energy threshold for the ionization process has been determined and the ions produced identified by mobility measurements. The data give lower limits for the dissociation energies of K{sup +2}, Rb{sup +2} and Cs{sup +2}. Each of these molecular ions has a bond energy approximately 50% greater than that of the corresponding neutral molecule. In addition, lower limits for the electron affinities of the alkali atoms and approximate values for the mobilities of Rb{sup +} and Rb{sup +2} in rubidium vapor are given.
Date:
February 1, 1965
Creator:
Lee, Yuan-tseh & Mahan, Bruce H.
System:
The UNT Digital Library
SEARCH FOR MASSIVE PARTICLES PRODUCED IN INTERACTIONS AT 30 Bev
None
Date:
February 1, 1965
Creator:
Franzini, P.; Leontic, B.; Rahm, D.; Samios, N. & Schwartz, M.
System:
The UNT Digital Library
Fragment Anisotropies in Neutron-, Deuteron-, and Alpha-Particle-Induced Fission
None
Date:
February 22, 1965
Creator:
Leachman, R. B. & Blumberg, L.
System:
The UNT Digital Library
Localized Self-Consistent Field Orbitals in Atoms and Molecules
None
Date:
February 23, 1965
Creator:
Ruedenberg, Klaus
System:
The UNT Digital Library
ANALYSIS OF A DAMASCUS STEEL BY NEUTRON AND GAMMA ACTIVATION
None
Date:
February 25, 1965
Creator:
Voigt, A.F. & Abu-Samra, A.
System:
The UNT Digital Library
WAKE FIELDS OF A PULSE OF CHARGE MOVING IN A HIGHLY CONDUCTING PIPE OF CIRCULAR CROSS SECTION
Expressions are presented for the electric and magnetic fields due to a pulse of charge, which may be oscillating transversely while moving down an infinitely long highly conducting pipe of circular cross section. The expressions are evaluated at large distances from the pulse and the fields are shown to decrease algebraically in the distance behind the pulse. In the absence of transverse oscillations the longitudinal electric field varies as the inverse three-halves power of the distance; in the presence of oscillations the dominant field component is the transverse magnetic field, which decreases as the inverse one-half power. In the long-range limit the amplitude of the fields is proportional to the square root of the wall resistivity. The phase of the field associated with the oscillating pulse is shown to be the phase of the pulse at the time when it passed the point of observation.
Date:
February 28, 1966
Creator:
Morton, P. L.; Neil, V. K. & Sessler, A. M.
System:
The UNT Digital Library
Strength of the S-F Exchange Interaction in Rare Earth Intermetallics
None
Date:
February 2, 1967
Creator:
Barnes, R. G. & Jones, E. D.
System:
The UNT Digital Library
NOBELIUM: TRACER CHEMISTRY OF THE DIVALENT AND TRI-VALENTIONS
In the absence of oxidizing or reducing agents the chromatographic and coprecipitation behavior of element 102 is similar to that of the alkaline earth elements. After oxidation with ceric ions, the behavior is that expected of a trivalent actinide. The conclusion is that nobelium is the first actinide for which the +2 oxidation state is the most stable species in aqueous solution.
Date:
February 1, 1968
Creator:
Maly, Jaromir; Sikkeland, Torbjorn; Silva, Robert & Ghiorso, Albert.
System:
The UNT Digital Library
FAST BEAM CHOPPERS FOR THE ELECTRON-RING ACCELERATOR
Two beam choppers were constructed which produce an approximately square, 20-ns pulse of 3+-MeV electrons out of the best portion of the 300-ns Astron beam or an 8-{micro}s microwave electron linac beam for injection into the electron-ring accelerator (ERA) compressor. The choppers are impedance-matched traveling-wave devices which deflect the beam with equal strength electric and magnetic forces, and are powered with either three-electrode spark gaps or thyratrons and a 20-ns pulse line. The electron beam is biased out of the beam-transport system with a dc magnetic field, and switched into it with the chopper.
Date:
February 7, 1969
Creator:
Faltens, Andris & Kerns, Cordon.
System:
The UNT Digital Library
Excitation of a Closed Cylindrical Cavity by a Charged Ring Moving Along the Axis at Constant Velocity
None
Date:
February 10, 1969
Creator:
Levine, Barbara S. & Sessler, Andrew M.
System:
The UNT Digital Library