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  • 1990-1994  (6)
  • 1975-1979  (5)
  • 1915-1919  (1)
  • 1
    Digitale Medien
    Digitale Medien
    A Miniature Gamma Camera (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 720 (1994), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1994.tb30447.x
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  • 2
    Digitale Medien
    Digitale Medien
    Über die Bedeutung der Muchschen Granula für die Prognose der Lungentuberkulose (1918)
    Springer
    Lung 39 (1918), S. 37-44 
    Details
    ISSN: 1432-1750
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Zusammenfassung 1. Die Granula Muchs sind für eine günstige Prognosestellung bei der Lungentuberkulose nicht verwertbar. 2. Sie stehen in engem Abhängigkeitsverhältnis zu den säurefesten Tuberkelbazillen: ohne säurefeste Bazillen auch keine Muchschen Formen. Deshalb sind alle Fälle von Lungentuberkulose, bei denen Muchsche Formen gefunden werden, als offene und in prognostischer Hinsicht als vorsichtiger zu beurteilende Fälle anzusehen. 3. Die Granula Muchs können sich aus mehr als 5, bis zu 9 Körnern zusammensetzen, desgleichen können den säurefesten Tuberkelbazillen nach der Gram-Färbung mehr als 7, bis zu 9 Körner eingelagert sein. 4. Entstehung der Muchschen Formen scheint sowohl durch Austreten der Körner aus dem Bazillenleib, als auch durch sukzessiven Untergang des säurefesten Leibes möglich zu sein.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01869548
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  • 3
    Digitale Medien
    Digitale Medien
    The effect of ribonuclease on the replicative forms of Sindbis virus RNA (1979)
    Springer
    Archives of virology 60 (1979), S. 131-146 
    Details
    ISSN: 1432-8798
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Three species of double-stranded RNA, designated RF I, RF II, and RF III in order of decreasing size (25), are produced by ribonuclease treatment of extracts of chicken embryo cells infected for 6 hours with Sindbis virus. Only one class of replicative form RNA is present in extracts not treated with ribonuclease; this class contains some molecules which can be enzymatically cleaved to produce the other two replicative forms. At a low level of enzyme (0.001 µg/ml) the major species obtained was RF I, the replicative form of the genome. When the enzyme concentration was increased 10-, 100-, and 1000-fold, there was a progressive increase in the proportions of RF's II and III and a concomitant decrease in the proportion of RF I. The generation of RF's II and III by nuclease resulted in the ratio expected for these two species if they are produced by cleavage of RF I-like molecules. In preparations of isolated double-stranded RNA, only RF I and replicative intermediate RNA were present. Mild nuclease treatment of these preparations converted the replicative intermediates primarily to RF I. Higher enzyme levels generated greater proportions of RF II and RF III, but RF I-like molecules were the major source for these increased proportions. Treatment of the isolated naturally occurring replicative form with 0.01 µg of ribonuclease per ml cleaved some molecules migrating as RF I during gel electrophoresis into molecules which migrated as RF II and RF III.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01348029
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  • 4
    Digitale Medien
    Digitale Medien
    Artists' offspring (1992)
    [s.l.] : Nature Publishing Group
    Nature 356 (1992), S. 189-189 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] SIR - The possibility that artists have more sons than daughters is suggested by a count of the following sources: (1) those for whom the relevant information is included in Who's Who in Art, 24th edition1 (which covers artists, designers, craftsmen, critics, writers, teachers and curators); ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/356189b0
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  • 5
    Digitale Medien
    Digitale Medien
    Correlation of magnetic and optical structure in the barred spiral galaxy M83 (1991)
    [s.l.] : Nature Publishing Group
    Nature 352 (1991), S. 781-783 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The observations were made in spring 1990 using a new four-feed receiver system operating at 10.6 GHz and installed in the secondary focus of the 100-m telescope. The observational technique and data analysis used the multi-beam restoration technique8 and the software beam-switching mode9. Each ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/352781a0
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  • 6
    Digitale Medien
    Digitale Medien
    Offspring of scientists (1992)
    [s.l.] : Nature Publishing Group
    Nature 358 (1992), S. 617-617 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] SIR - R. C. Connolly1 comments that the sex ratio (proportion of the total population who are male) of 0.5278 among the offspring of artists2 may be linked to the size of the artists' families. Reviewing the data, I find an average of 2.333 children per artist in the group (of 1,489 artists), and ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/358617a0
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  • 7
    Digitale Medien
    Digitale Medien
    In-flight test of a continuous laser remote sensing system (1978)
    Springer
    Applied physics 15 (1978), S. 257-260 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 42.60 ; 07.62
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract An airborne laser system for remote sensing has been developed and tested at flight altitudes from 500 to 1200 m. The system is based on two continuous-wave CO2 lasers (output 3 W), tunable to different wavelengths, and detects the laser radiation scattered back from earth by heterodyne reception. The feasibility of the heterodyne reception technique under aircraft environment conditions was demonstrated, and man-made SF6 clouds and different types of uncovered minerals were traced. The data obtained indicate that the measuring range of the system can be increased to satellite distance by using a larger telescope and a more powerful laser and by reducing the electrical bandwidth.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00896105
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  • 8
    Digitale Medien
    Digitale Medien
    Photofission of235U and238U at intermediate energies: absolute cross sections and fragment mass distributions (1994)
    Springer
    The European physical journal 350 (1994), S. 249-261 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.20.Dc ; 25.85.Jg ; 27.90.+b
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The total photofission cross section σγ,F for235U and238U has been measured in the energy range 50≤E γ≤800 MeV at the 855 MeV Mainz Microtron MAMI using energy and time tagged photons (Glasgow Tagger) and a 4π arrangement of position sensitive fragment detectors. Besides the absolute photofission cross section σγF , which almost completely exhausts the total photon absorption cross section for these nuclei, fragment mass distributions in this energy domain were determined via time of flight techniques (TOF). The results for the total photofission cross sections σγ,F normalized to the atomic numberA for both isotopes coincide, and agree in theΔ-resonance region, within the systematic errors, with the socalled“Universal Curve” σγ,T /A of the total photon absorption cross section σγ,T . At higher energies the cross sections exhibit a smooth behaviour. In particular, it is shown for the first time that there isno resonance-like shape near the D13 resonance (at ≈710 MeV) as observed for the free proton. This complete suppression of the D13 resonance in complex nuclei is not yet understood on a microscopic level. The fragment mass distributions show a predominantly mass symmetric fission. However, contributions from mass asymmetric fission at some photon energies may give a hint of an increased mass asymmetric fission after the onset of the pion and two pion channels.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01289589
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  • 9
    Digitale Medien
    Digitale Medien
    On the change of polarization of positive muons in alkali halides (1975)
    Springer
    The European physical journal 22 (1975), S. 109-115 
    Details
    ISSN: 1434-6036
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Positive muons implanted in nonconducting solids form with high probability hydrogenlike muonium atoms (µ + e −) with properties similar to those ofU 2-centers. The influence of superhyperfine interactions with neighbor nuclei on the evolution of the polarization of the muon is investigated theoretically. The resulting muon polarization in longitudinal magnetic fields is calculated for muonicU 2-centers in some alkali halides.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01322352
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  • 10
    Digitale Medien
    Digitale Medien
    Comparative analysis of intrathecal antibody synthesis and DNA amplification for the diagnosis of cytomegalovirus infection of the central nervous system in AIDS patients (1994)
    Springer
    Journal of neurology 241 (1994), S. 407-414 
    Details
    ISSN: 1432-1459
    Schlagwort(e): Cytomegalovirus ; Acquired immunodeficiency syndrome ; Recombinant phosphoprotein (pp150) ; Intrathecal antibody synthesis ; Polymerase chain reaction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We evaluated 49 paired cerebrospinal fluid (CSF) and serum samples of 35 patients infected with the human immunodeficiency virus type 1 (HIV-1) for laboratory evidence of cytomegalovirus (CMV) infection. The patients were grouped according to clinical criteria as probable CMV encephalitis/polyradiculomyelitis, CMV retinitis, cerebral toxoplasmosis, progressive multifocal leukoencephalopathy, HIV-1-related cognitive/motor complex, HIV-1-associated myelopathy, and other neurological diseases. Paired CSF and serum samples were analysed for CMV deoxyribonucleic acid (DNA) by polymerase chain reaction (PCR), quantitative intrathecal synthesis of immunoglobulin G (IgG) antibodies specific for recombinant phosphoprotein 150 (pp150) of CMV and CMV-specific serum IgM. Intrathecal synthesis of pp150-specific IgG was detected in 26% of patients (9/35), serum IgM was found in 23% of patients (8/35), and PCR of CSF was positive in 11% of patients (4/35). Detection of CMV-specific DNA in CSF preceded the intrathecal antibody synthesis in three patients for whom serial samples were available. PCR results of the CSF became negative in one patient with CMV polyradiculomyelitis after successful therapy with 9-[2-hydroxy-l(hydroxymethyl) ethoxymethyl] guanine (DHPG). PCR has a higher diagnostic specificity in the acute phase of CMV infection than intrathecal antibody synthesis. The serum IgM response to CMV cannot be used to monitor a compartmentalized immune response in the central nervous system while an intrathecal immune response seems to be associated with recovery either spontaneously or as a result of treatment.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00900957
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