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  • 1
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Antiproliferative activity ; Apoptosis ; DNA fragmentation ; Δ^1^2-prostaglandin J"2
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(93)80110-G
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 2
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Adenosine ; Adenosine deaminase deficiency ; Apoptosis ; c-myc ; DNA fragmentation ; Proto-oncogene ; L1210 lymphocytic leukemia cells ; Severe combined immunodeficiency syndrome
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02253342
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
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    Unbekannt
    Hard X-ray spectrum of a plasma focus (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Plasma focus hard X ray spectrum, using electron sensitive nuclear emulsions
    Schlagwort(e): PHYSICS, PLASMA
    Materialart: ; UG-REVUE(
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Neutron production mechanism in a plasma focus. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The neutrons emitted by a plasma focus were analyzed by using a time-of-flight method. Flight paths as large as 80 m were used to obtain better than 10% energy resolution. The energy spectrum of neutrons from d-d reactions in the plasma focus shows a sharp onset with average maximum energies of 2.8 and 3.2 MeV in the radial and the axial directions, respectively. The average half-width of the energy spectrum was 270 keV with a shot-to-shot variation between 150 and 400 keV. Simultaneous measurements in the axial and radial directions showed no appreciable difference in the half-widths and thus indicated randomly oriented ion velocities in the plasma. A converging ion model is described which is found to be in agreement with the measured quantities.
    Schlagwort(e): PHYSICS, PLASMA
    Materialart: Physics of Fluids; 14; Oct. 197
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
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    Anisotropy of the neutron fluence from a plasma focus. (1972)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The fluence of neutrons from a plasma focus was measured by gamma spectrometry of an activated silver target. This method results in a significant increase in accuracy over the beta-counting method. Multiple detectors were used in order to measure the anisotropy of the fluence of neutrons. The fluence was found to be concentrated in a cone with a half-angle of 30 deg about the axis, and to drop off rapidly outside of this cone; the anisotropy was found to depend upon the total yield of neutrons. This dependence was strongest on the axis. Neither the axial concentration of the fluence of neutrons nor its dependence on the total yield of neutrons is explained by any of the currently proposed models. Some other explanations, including the possibility of an axially distributed source, are considered.
    Schlagwort(e): PHYSICS, PLASMA
    Materialart: Physics of Fluids; 15; Dec. 197
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
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    Current sheet collapse in a plasma focus. (1972)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Collapse of the current sheets in a plasma focus has been recorded simultaneously through slits parallel and perpendicular to the symmetry axis in the streak mode. The dark period following the collapse is due to the plasma moving out of the field of view. Microdensitometric measurements of intensity variation also support this conclusion. A large anisotropy is also found in the x-ray radiation pattern. Effects of different vacuum vessels were investigated.
    Schlagwort(e): PHYSICS, PLASMA
    Materialart: Physics of Fluids; 15; Nov. 197
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 7
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    Cryogenic and thermal design for the Superfluid Helium On-Orbit Transfer (SHOOT) experiment (1988)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: The analysis and trade-offs of the external thermal design of the two 200-liter dewars required in the SHOOT experiment to extend space mission life by superfluid helium replenishment are discussed. Also considered are the support electronics and the optimization and prediction of the performance of the dewar and cryostat assemblies. Particular attention is given to the ground-hold and standby performance of the dewars, along with the temperature of the helium bath during high-flow-rate helium transfers.
    Schlagwort(e): ASTRONAUTICS (GENERAL)
    Materialart: Advances in cryogenic engineering.; Jun 14, 1987 - Jun 18, 1987; Saint Charles, IL; United States
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 8
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    Comparison of SIRTF dewar performance in the 900 km and 100,000 km orbits (1990)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Feasibility studies showed that the Space Infrared Telescope Facility (SIRTF) can be launched into a 100,000-km high earth orbit (HEO) using a Titan/Centaur launch vehicle. This paper compares the performance of an all-superfluid helium dewar system for SIRTF under conditions of the LEO (900-km) and the HEO missions. Results show that the SIRTF all-superfluid He dewar can achieve a 5-yr lifetime for the 100,000 km HEO mission, with 20 percent margin. Methods to achieve further enhancement of dewar lifetime for the HEO mission are suggested.
    Schlagwort(e): ASTRONAUTICS (GENERAL)
    Materialart: 1989 Cryogenic Engineering Conference; Jul 24, 1989 - Jul 28, 1989; Los Angeles, CA; United States
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
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    Pump performance requirement for the liquid helium orbital resupply tanker (1988)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: The Liquid Helium Orbital Resupply Tanker (currently renamed to Superfluid Helium Tanker) will greatly enhance the lifetime of the space missions which require superfluid helium. The Superfluid Helium Tanker pump performance requirement is driven by the superfluid helium replenishment needs of the Space Infrared Telescope Facility (SIRTF). SIRTF is one of the space missions which will require on-orbit superfluid helium resupply in the 1990s. The Superfluid Helium Tanker will carry at least 10,000 L of superfluid helium and provide a minimum pump head of 170 torr (0 to 200 L/h) to cool SIRTF from 150 to 2 K. When the SIRTF tank starts to collect liquid, a minimum flow rate of 300 L/h with a pump head of 60 torr is required to fill the 4000-liter tank.
    Schlagwort(e): ASTRONAUTICS (GENERAL)
    Materialart: Advances in cryogenic engineering.; Jun 14, 1987 - Jun 18, 1987; Saint Charles, IL; United States
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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