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  • 1990-1994  (3)
  • 1965-1969  (11)
  • 1945-1949  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Energy levels in Ge74 from the reaction Ge73 (n, γ) Ge74 (1966)
    Springer
    The European physical journal 192 (1966), S. 423-438 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The level structure of Ge74 has been investigated at the Karlsruhe research reactor using thermal neutron capture in Ge73. Neutrons were monochromized by Bragg reflection from a lead single crystal. The target was Ge73 enriched to 86.1%. Precision measurements of the capture gamma-ray spectrum have been performed over the whole energy range by means of a 4 cm2×0.5 cm lithium-drifted germanium detector. 148 gamma transitions have been observed. Considerable aid in analysis of the level structure is provided by double and triple coincidence measurements with 4″ ∅ × 5″ NaI(Tl) detectors. Data were processed using the Karlsruhe Multiple Input Data Acquisition System (MIDAS). A level scheme of Ge74 is proposed involving 38 excited states in the energy range from 0 to 4400 keV. The neutron binding energy of Ge74 is determined to be 10202±10 keV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01325678
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A study of the radiation from Am241 (1965)
    Springer
    The European physical journal 186 (1965), S. 42-62 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The radiation from the alpha decay of Am241 has been investigated by studying the fine structure of the alpha spectrum and by performing alpha-gamma and gamma-gamma coincidence measurements. For the daughter nucleus Np237 a level scheme is proposed which comprises 21 excited states and 39 gamma transitions. Evidence was found for the existence of previously unknown gamma rays at (80), 82, 88, (90), 100, 150 (two transitions), 170, (~210), 295, (300), 360, 420, 460 and 690 keV, as well as for the probable occurrence of a new fine structure alpha group at 4754 keV corresponding to a level at 804 keV. For the alpha groups and for most of the gamma rays absolute intensities are given. For some transitions theK-conversion coefficients and multipolarities were determined. The results are discussed within the framework of the unified model. The level density agrees well with the predictions of the superfluid model and is approximately twice the density yielded fromNilsson's theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01383509
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  • 3
    Electronic Resource
    Electronic Resource
    Präzisionsmessung des Am241-Gammaspektrums (1966)
    Springer
    The European physical journal 194 (1966), S. 395-404 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Das beimα-Zerfall von Am241 auftretende Gammaspektrum wurde mit Hilfe eines 4 cm2× 0,5 cm Ge(Li)-Zählers untersucht. Durch Reduzierung der integralen Untergrundzählrate auf 11 Impulse/min wurde eine Nachweisgrenze von etwa 10−8 γ-Quanten proα-Teilchen erreicht. Gegenüber einer früheren Arbeit des Autors1 konnten 18 neue Übergänge im Tochterkern Np237 beobachtet werden. Die Ergebnisse bestätigen die Existenz folgender Bandenköpfe: 0 keV, 5/2+ [642]; 59,6 keV, 5/2− [523]; 267,4 keV, 3/2− 1/2 [530]; 333 keV, 1/2+ [400]; 358,8 keV, 3/2+ [651]; 441 keV, 3/2− [521]; 721,4keV,β- Vibration zu 5/2− [523]. Für alle beobachteten Linien werden absolute Intensitäten angegeben. Die Messung ermöglicht für mehrere Anregungszustände einen Vergleich der experimentellen reduzierten Übergangswahrscheinlichkeiten mit theoretischen Voraussagen. Offenbar wird auch das zweite Niveau derβ- Vibrationsbande entgegen theoretischen Erwartungen zur zugehörigen inneren Anregung überwiegend durch M1-Strahlung abgeregt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326282
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  • 4
    Electronic Resource
    Electronic Resource
    Neutron capture gamma ray investigation of Sr88 level structure (1966)
    Springer
    The European physical journal 194 (1966), S. 373-394 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The level structure of Sr88has been investigated at the Karlsruhe research reactor FR2 using thermal neutron capture in Sr87. A pure thermal neutron beam was obtained by Bragg reflection from a lead single crystal. The target was natural strontium which gives a cross section contribution of about 87% for the reaction Sr87(n,γ) Sr88. High resolution measurements of the capture gamma ray spectrum have been performed by means of a 4 cm2 × 0.5 cm lithium-drifted germanium diode. 146 gamma lines have been observed. Cascade relationships were studied by a double and triple coincidence apparatus containing 4″Ø × 5″ NaI(Tl) crystals and XP-1040 photomultipliers. In several cases coincident background was subtracted utilizing the doublewindow technique. By application of the triple sum coincidence method capture gammas from isotopes other than the investigated Sr88 nucleus could be eliminated. Several new levels were established. A transition scheme is proposed and discussed. The neutron binding energy of Sr88 is determined to be 11111±4 keV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326281
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  • 5
    Electronic Resource
    Electronic Resource
    Hydrothermal gas generation in a back-arc basin (1991)
    Springer
    Naturwissenschaften 78 (1991), S. 64-66 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01206256
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  • 6
    Electronic Resource
    Electronic Resource
    Combined raman elastic-backscatter LIDAR for vertical profiling of moisture, aerosol extinction, backscatter, and LIDAR ratio (1992)
    Springer
    Applied physics 55 (1992), S. 18-28 
    Details
    ISSN: 1432-0649
    Keywords: 42.68.Rp ; 93.85.+q ; 94.10.Gb ; 92.60.Jq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A combined Raman elastic-backscatter lidar has been developed. A XeCl excimer laser is used as the radiation source. Inelastic Raman backscatter signals are spectrally separated from the elastic signal with a filter or grating polychromator. Raman channels can be chosen to register signals from CO2, O2, N2, and H2O. Algorithms for the calculation of the water-vapor mixing ratio from the Raman signals and the particle extinction and backscatter coefficients from both elastic and inelastic backscatter signals are given. Nighttime measurements of the vertical humidity distribution up to the tropopause and of particle extinction, backscatter, and lidar ratio profiles in the boundary layer, in high-altitude water and ice clouds, and in the stratospheric aerosol layer are presented. Daytime boundary-layer measurements of moisture and particle extinction are made possible by the improved daylight suppression of the grating polychromator. Test measurements of the CO2 mixing ratio indicate the problems for the Raman lidar technique in monitoring other trace gases than water vapor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348608
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchungen über die feinere Plasmastruktur der Korpusschleimhaut während der Menstruation und in der Gravidität (1949)
    Springer
    Archives of gynecology and obstetrics 176 (1949), S. 399-406 
    Details
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung 1. Es wurde festgestellt, daß sowohl die Epithel-als auch die Stromazellen der funktionierenden Uterusschleimhaut eine gut ausgebildete Mitochondrienstruktur und ein entsprechend entwickeltes Binnennetz besitzen. 2. Die Mitochondrien sind während der Zyklusphase und in der Gravidität einer Veränderung unterworfen, welche sich in einer fortschreitenden körnigen Umwandlung äußert. Diese beginnt bei den Epithelzellen, abgesehen vom Menstruationszerfall, schon in der prägraviden Phase, während sie bei den Stromazellen erst im 5. Bis 6. Graviditätsmonat zu beobachten ist. 3. Die körnige Umwandlung ist als ein degenerativer Vorgang aufzufassen. 4. Das Binnennetz macht während der Zyklusphase und in der Gravidität ebenfalls Veränderungen durch. Diese bestehen, abgesehen vom Menstruationszerfall, bei den Epithelzellen bis zum 1.–2. Graviditätsmonat in einer langsam fortschreitenden hypertrophie- bzw. hyperplasieartigen Umwandlung mit daran anschließender allmählicher Degeneration. Die Stroma- bzw. Deciduazellen zeigen dagegen noch im 5.–6. Schwangerschaftsmonat eine im obigen Sinne äußerst stark entwickelte Binnennetzstruktur deren allmähliche Degeneration erst nach dem 6. Graviditätsmonat auftritt. 5. Die hypertrophie- bzw. hyperplasieartige Umwandlung des Binnennetzes wird als ein Zeichen erhöhter Zellfunktion aufgefaßt. 6. Das obenerwähnte unterschiedliche Verhalten der Mitochondrien und des Binnenapparates der Epithel- bzw. Stromazellen weist darauf hin, daß die Stromazellen während der Gestation eine wichtigere Rolle spielen als das Drüsenepithel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00981674
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Multivariate statistical analysis of aerosol immission data — An exemplary investigation on the North Frisian island of Pellworm (1994)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 350 (1994), S. 614-619 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Element concentrations of 23 elements in different particle size fractions of aerosol samples from the island of Pellworm in the German Bight were analyzed by the help of total reflection X-ray fluorescence analysis. These immission data were investigated with multivariate statistical methods. Multivariate correlation analysis, as a newer chemometric method, demonstrates the autocorrelation of the immission state for different particle size fractions of dustlike aerosols. The immission of smaller particles is more strongly autocorrelated than that of larger particles. The factor analysis of each particle size fraction allows the extraction of two pollution factors for each fraction. The weights of these factors, anthropogenic and sea spray, change with size. The anthropogenic factor is more highly weighed for smaller particles, the sea spray factor is stronger in larger particles. The dependence of factor scores for smaller particles on wind direction indicates the sources of the extracted factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00323513
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  • 9
    Electronic Resource
    Electronic Resource
    Die Perfusion homologer Nieren mit Nucleinsäuren des Empfängers (1968)
    Springer
    Langenbeck's archives of surgery 322 (1968), S. 1163-1168 
    Details
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über 24 homologe Nierentransplantationen bei Hunden berichtet, bei welchen die Nieren mit Nucleinsäuren des Empfängers perfundiert wurden. Kurz vor der Transplantation wurden DNS oder RNS aus der Milz des Empfängers extrahiert. Mit dieser Methode konnte eine Überlebenszeit der Hunde bis zu 30 Tagen ohne immunosuppressive Therapie erreicht werden. Um die Aufnahme von DNS und RNS sowie deren Lokalisation zu objektivieren, wurden Rattennieren mit radioaktiv-markierten Nucleinsäuren perfundiert. Eine Markierung von 80–100% fand sich ausnahmslos in den Tubulus-Epithelzellen, nicht jedoch in den Glomerula oder Gefäßendothelien. Nach Perfusion mit DNS wiesen 50% der Tubulus-Zellen eine deutliche Anreicherung der Radioaktivität im Bereich des Zellkernes auf.
    Notes: Summary This is a report on 24 homologous kidney transplantations in dogs whereby the kidneys were perfused with nucleic acids of the recipient. Shortly before the transplantation DNA or RNA were extracted from the spleen of the recipient. Through the use of this method it was possible to achieve a survival period for the dogs of up to 30 days without any immunosuppressive therapy. To be able to determine the take-up of DNA and RNA and their localization objectively, the kidneys of rats were perfused with radioactively labeled nuclei cacids. A 80–100% density of tracer elements was found exclusively in the tubular epithelial cells, not however in the glomerula or vascular endothelium. After perfusion with DNA about 50% of the tubular cells showed a marked increase of radioactivity in the area of the cell nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02454021
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  • 10
    Electronic Resource
    Electronic Resource
    111. Die Bestimmung des Lysozyms im Serum und Urin nach Nierentransplantation (1969)
    Springer
    Langenbeck's archives of surgery 325 (1969), S. 719-725 
    Details
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Lysozym, ein Ferment, das vermehrt in den Lysosomen der Tubuluszellen der Niere lokalisiert ist, kann schon bei leichter Tubulusschädi-gung erhöht im Serum und Urin nachgewiesen werden. Die spektrophotometrische Bestimmung im klinischen Routinebetrieb ist einfach, schnell und zuverlässig. Nach 46 Nierentransplantationen beim Hund und 4 beim Menschen wurden die Lysozymwerte mit den Kreatinin- und Harnstoff-N-Werten verglichen. Aufgrund des Lysozymanstieges im Urin konnte durchschnittlich 2 Tage früher der Verdacht auf eine Abstoßungskrise geäußert werden als mit den bisherigen Methoden. Die Bestimmung des Urin- und Serumlysozyms darf als nierenspezifisch angesehen werden und kann als Routinemethode nach einer Nierentransplantation empfohlen werden.
    Notes: Summary Lysozyme, an enzyme which is found extensively in the lysosomes of the renal tubular cells, can be shown to be increased in serum and urine even in only mild tubular damage. Spectrophotometric determination in everyday clinical routine is simple, rapid and reliable. After 46 kidney transplants in dogs and 4 in humans, the lysozyme-levels were compared with the urea-N-levels and the creatinine-levels. On the basis of the lysozyme increase in the urine, suspicion of a rejection-crisis could be asserted on average 2 days earlier than by previous methods. The determining of urine- and serum-lysozyme may be regarded as specific to the kidney and can be recommended as a routine test after a kidney transplant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01256002
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