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  • 1
    Electronic Resource
    Electronic Resource
    Prostaglandin A"2 and Δ^1^2-prostaglandin J"2 induce apoptosis in L1210 cells
    Amsterdam : Elsevier
    FEBS Letters 321 (1993), S. 209-214 
    Details
    ISSN: 0014-5793
    Keywords: Antiproliferative activity ; Apoptosis ; DNA fragmentation ; Δ^1^2-prostaglandin J"2
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(93)80110-G
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Induction of apoptosis and c-myc in L1210 lymphocytic leukemia cells by adenosine (1994)
    Springer
    Journal of biomedical science 1 (1994), S. 154-157 
    Details
    ISSN: 1423-0127
    Keywords: Adenosine ; Adenosine deaminase deficiency ; Apoptosis ; c-myc ; DNA fragmentation ; Proto-oncogene ; L1210 lymphocytic leukemia cells ; Severe combined immunodeficiency syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract High concentrations of adenosine (Ado), when added to L1210 lymphocytic leukemia cells, resulted in apoptosis or programmed cell death. The apoptotic process was accompanied by distinct morphological changes including chromatin condensation and blebbing of plasma membranes. Extensive DNA fragmentation was correlated with Ado concentrations. Furthermore, apoptosis in these cells was preceded by an early but transient expression of c-myc proto-oncogene, and was not influenced by homocysteine thiolactone added to the cells. Since severe combined immunodeficiency (SCID) is associated with a deficiency of adenosine deaminase, leading to defects in both cellular and humoral immunity, Ado-induced apoptosis may thus be a contributing factor in the pathology of SCID.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02253342
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Production of dense plasmas in a hypocycloidal pinch apparatus (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: A high-power pinch apparatus consisting of disk electrodes was developed, and diagnostic measurements to study its mechanism of dense plasma production have been made. The collapse fronts of the current sheets are well organized, and dense plasma foci are produced on the axis with radial stability in excess of 5 microsec. A plasma density greater than 10 to the 18th power per cu cm is determined with Stark broadening and CO2 laser absorption. Essentially complete absorption of a high-energy CO2 laser beam has been observed. A plasma temperature of approximately 1 keV is measured with differential transmission of soft X-rays through thin foils. The advantages of this apparatus over the coaxial plasma focus are improvements in (1) plasma volume, (2) stability, (3) containment time, (4) access to additional heating by laser or electron beams, and (5) the possibility of scaling up to a multiple array for high-power operation.
    Keywords: PLASMA PHYSICS
    Type: Physics of Fluids; 20; Feb. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Uranium plasma emission at gas-core reaction conditions (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The results of uranium plasma emission produced by two methods are reported. For the first method a ruby laser was focused on the surface of a pure U-238 sample to create a plasma plume with a peak plasma density of about 10 to the 20th power/cu cm and a temperature of about 38,600 K. The absolute intensity of the emitted radiation, covering the range from 300 to 7000 A was measured. For the second method, the uranium plasma was produced in a 20 kilovolt, 25 kilojoule plasma-focus device. The 2.5 MeV neutrons from the D-D reaction in the plasma focus are moderated by polyethylene and induce fissions in the U-235. Spectra of both uranium plasmas were obtained over the range from 30 to 9000 A. Because of the low fission yield the energy input due to fissions is very small compared to the total energy in the plasma.
    Keywords: PLASMA PHYSICS
    Type: Princeton Univ. Partially Ionized Plasmas, Including the 3rd Symp. on Uranium Plasmas; p 156-159
    Format: text
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  • 5
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    Absolute intensity of radiation emitted by uranium plasmas (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The absolute intensity of radiation emitted by fissioning and nonfissioning uranium plasmas in the spectral range from 350 nm to 1000 nm was measured. The plasma was produced in a plasma-focus apparatus and the plasma properties are simular to those anticipated for plasma-core nuclear reactors. The results are expected to contribute to the establishment of design criteria for the development of plasma-core reactors.
    Keywords: PLASMA PHYSICS
    Type: NASA-TM-X-71942
    Format: application/pdf
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  • 6
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    Dense plasma focus production in a hypocycloidal pinch (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A type of high-power pinch apparatus consisting of disk electrodes was developed, and diagnostic measurements to study its mechanism of dense plasma production were made. The collapse fronts of the current sheets are well organized, and dense plasma focuses are produced on the axis with radial stability in excess of 5 microns. A plasma density greater than 10 to the 18th power/cubic cm was determined with Stark broadening and CO2 laser absorption. A plasma temperature of approximately 1 keV was measured with differential transmission of soft X-rays through thin foils. Essentially complete absorption of a high-energy CO2 laser beam was observed. The advantages of this apparatus over the coaxial plasma focus are in (1) the plasma volume, (2) the stability, (3) the containment time, (4) the easy access to additional heating by laser or electron beams, and (5) the possibility of scaling up to a multiple array for high-power operation.
    Keywords: PLASMA PHYSICS
    Type: NASA-TN-D-8116 , L-10549
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Solar-driven liquid metal magnetohydrodynamic generator (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A solar oven heated by concentrated solar radiation as the heat source of a liquid metal magnetohydrodynamic (LMMHD) power generation system is proposed. The design allows the production of electric power in space, as well as on Earth, at high rates of efficiency. Two types of the solar oven suitable for the system are discussed.
    Keywords: PLASMA PHYSICS
    Type: NASA-TM-81965
    Format: application/pdf
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  • 8
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    Investigation of a staged plasma-focus apparatus (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A new staged plasma-focus geometry combining two Mather-type plasma-focus guns was constructed, and the current-sheet dynamics were investigated. The production of simultaneous pairs of plasma foci was achieved. The intensities of X-ray and fusion-neutron emission were measured and found to agree with the scaling law for a plasma focus. Advantages of this new geometry include the possibility of using plasma-focus type pinches in multiple arrays at power levels beyond the validity regime of the current scaling law for a single gun.
    Keywords: PLASMA PHYSICS
    Type: Plasma Physics; 20; Oct. 197
    Format: text
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  • 9
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    Space and time resolved emission of hard X-rays from a plasma focus (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The X-ray emission from focused plasmas was observed with an image converter camera in the streak and framing modes. Use of a very high gain image intensifier enabled weak hard X-ray emission (above 25 keV) to be recorded. The use of an admixture of higher atomic number into the deuterium was avoided, and the role of the vapor from the anode surface could be discerned. The recorded bremsstrahlung emission seemed to be from a metallic plasma of copper released from the anode surface by bombardment from an intense electron beam. The intensity of emission was determined by the density of copper and the density and energy of the electron beam. The main emission recorded occurred several 100 nsec after the focus was over, which implies that the electric fields driving the beam existed for this duration. It is suggested that the fields were created by annihilation of magnetic flux for a time much longer than the focus duration.
    Keywords: PLASMA PHYSICS
    Type: Plasma Physics; 20; Sept
    Format: text
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  • 10
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    Investigation of high energy radiation from a plasma focus (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Included are seventeen topics covering the experimental setup, diagnostics, analyses and various applications of the plasma focus. An invention, a hypocycloidal-pinch apparatus, is also included.
    Keywords: PLASMA PHYSICS
    Type: NASA-CR-146851
    Format: application/pdf
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