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  • 1
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 78 (1956), S. 725-728 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Rheumatologie 58 (1999), S. 277-282 
    ISSN: 0340-1855
    Keywords: Schlüsselwörter Rheumatoide Arthritis ; Handflexorensehnen ; Tenosynovialitis ; Läsion ; Ruptur ; Key words Rheumatoid arthritis ; hand flexor tendons ; tenosynovitis ; tendon lesion ; tendon rupture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Objectives: To assess complaints and clinical findings of rheumatoid hand flexor tendon disease in relationship to the anatomical site and the type of lesion in order to improve the diagnosis and enable early operative treatment with preservation of hand function. Methods: 123 patients of the hands of 78 patients (66 female, 12 male) with a mean age of 57 years were analyzed retrospectively. Preoperative complaints and clinical findings were recorded according to their frequency. Three different types of flexor tendon disease were distinguished intraoperatively: isolated tenosynovitis, tenosynovitis with tendon lesion, and complete tendon rupture. Results: 188 tendons showed isolated synovitis, 208 had a tendon lesion with synovitis, and 30 tendons a rupture. Tenosynovitis was found in the palm and wrist mainly. The 2nd, 3rd and 4th finger were most frequently involved. 81 tendon adhesions, 12 nodules, 63 superficial lesions and 52 defects were detected. These lesions were found mainly in the palm and the second and third ray. The profundus tendon was affected most often. Ruptures were detected most often in the wrist caused by bony spurs and tenosynovitis. A clinical difference between tenosynovitis with and without tendon lesion was not found. However, complaints and findings were different in the digit, palm, wrist and forearm. Ruptures had characteristic clinical findings. Conclusions: Rheumatoid flexor tendon disease is common. Tenosynovitis is often accompanied by tendon lesions. Ruptures occur as disease progresses. Exact assessment of complaints and clinical findings is mandatory to diagnose and localize flexor tendon disease. Early operative intervention helps to preserve the function of the hand.
    Notes: Zusammenfassung Ziele: Die Symptomatik der rheumatischen Handflexorensehnenerkrankung in Abhängigkeit vom Läsionsort und von der Art der Sehenaffektion festzustellen, um durch eine verbesserte klinische Diagnostik eine frühzeitige operative Therapie mit Erhalt der Handfunktion zu ermöglichen. Methoden: In einer retrospektiven Analyse wurden 123 Handoperationen von 78 Patienten (66 Frauen, 12 Männer) mit einem mittleren Alter von 57 Jahren ausgewertet. Die präoperativen Beschwerden und klinischen Befunde wurden nach der Frequenz in die Kategorien häufig, fakulativ und selten aufgeteilt. Intraoperativ wurden drei pathologisch-anatomische Ausprägungsformen der Sehnenerkrankung unterschieden: isolierte Tenosynovialitis, Tenosynovialitis mit Sehnenläsion und komplette Sehnenruptur. Ergebnisse: Intraoperativ wurde an 188 Sehnen eine isolierte Tenosynovialitis, an 208 Sehnen eine Tenosynovialitis mit Läsion und an 30 Sehnen eine Ruptur gefunden. Die Tenosynovialitiden waren vor allem palmar und karpal lokalisiert. Der 2., 3. und 4. Strahl wiesen den häufigsten Befall auf. Es bestanden 81 Adhäsionen, 12 Knoten, 63 Aufrauhungen und 52 Auffaserungen. Diese Läsionen waren vor allem palmar am 2. und 3. Strahl lokalisiert und betrafen häufiger die Sehnen des Flexor digitorum profundus als die des Superficialis. Sehnenrisse traten am häufigsten karpal auf. Ursachen waren 10 knöcherne Sporne und 20 Tenosynovialitiden. Eine klinische Differenzierungsmöglichkeit zwischen Tenosynovialitis mit und ohne Sehnenläsion ließ sich in dieser Untersuchung nicht finden. Beschwerden und Befunde unterschieden sich bei digitaler, palmarer, karpaler und antebrachialer Lokalisation der Erkrankung. Die Rupturen hatten eine typische klinische Symptomatik. Schlußfolgerungen: Die rheumatische Erkrankung des Flexorensehnen ist nicht selten. Dabei bestehen häufig neben entzündlichen Veränderungen bereits Sehnenläsionen. Bei weiterer Progredienz der Erkrankung treten Rupturen auf, die ossär oder entzündlich verursacht sein können. Die exakte Anamnese und körperliche Untersuchung ermöglichen es, die rheumatische Sehnenerkrankung zu diagnostizieren und Aussagen über die Lokalisation zu machen. Durch operative Therapie kann die Handfunktion erhalten werden.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 27 (1997), S. 0 
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1434-601X
    Keywords: PACS. 14.60.Cd Electrons and positrons – 23.20.Ra Internal pair production – 25.70.Bc Elastic and quasielastic scattering – 25.70.De Coulomb excitation – 25.70.Hi Transfer reactions – 29.30.Aj Charged particle spectrometers: electric and magnetic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We present new results from measurements and simulations of positron spectra, originating from 238U + 181Ta collisions at beam energies close to the Coulomb barrier. The measurements were performed using an improved experimental setup at the double-Orange spectrometer of GSI. Particular emphasis is put on the signature of positrons from Internal-Pair-Conversion (IPC) processes in the measured e+-energy spectra, following the de-excitation of electromagnetic transitions in the moving Ta-like nucleus. It is shown by Monte Carlo simulations that, for the chosen current sweeping procedure used in the present experiments, positron emission from discrete IPC transitions can lead to rather narrow line structures in the measured energy spectra. The measured positron spectra do not show evidence for line structures within the statistical accuracy achieved, although expected from the intensities of the observed γ-transitions ( E γ∼ 1250-1600 keV) and theoretical conversion coefficients. This is due to the reduced detection efficiency for IPC positrons, caused by the limited spatial and momentum acceptance of the spectrometer. A comparison with previous results, in which lines have been observed, is presented and the implications are discussed.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1434-601X
    Keywords: PACS:14.60.Cd Electrons and positrons – 23.20.Ra Internal pair production – 25.70.Bc Elastic and quasielastic scattering – 25.70.De Coulomb excitation – 25.70.Hi Transfer reaction – 29.30.Aj Charged-particle spectrometers: electric and magnetic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We present the results of a Doppler-shift correction to the measured e+e−–sum-energy spectra obtained from e+e−–coincidence measurements in 238U +206Pb and 238U +181Ta collisions at beam energies close to the Coulomb barrier, using an improved experimental setup at the double-Orange spectrometer of GSI. Internal-Pair-Conversion (IPC) e+e− pairs from discrete nuclear transitions of a moving emitter have been observed following Coulomb excitation of the 1.844 MeV (E1) transition in 206Pb and neutron transfer to the 1.770 MeV (M1) transition in 207Pb. In the collision system 238U +181Ta, IPC transitions were observed from the Ta-like as well as from the U-like nuclei. In all systems the Doppler-shift corrected e+e−–sum-energy spectra show weak lines at the energies expected from the corresponding γ–ray spectra with cross sections being consistent with the measured excitation cross sections of the γ lines and the theoretically predicted IPC coefficients. No other than IPC e+e−–sum-energy lines were found in the measured spectra. The transfer cross sections show a strong dependence on the distance of closest approach (Rmin), thus signaling also a strong dependence on the bombarding energy close to the Coulomb barrier.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1434-601X
    Keywords: PACS:14.60.Cd Electrons (including positrons) – 23.20.En Angular distributions and correlation measurements – 23.20.Ra Internal pair production – 29.25.Rm Sources of radioactive nuclei – 29.30.Aj Charged-particle spectrometers: electric and magnetic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We present the first energy and angle resolved measurements of e+e−-pairs emitted from heavy nuclei (Z≥ 40) at rest by internal pair conversion (IPC) of transitions with energies of less than 2 MeV as well as recent theoretical results using the DWBA method, which takes full account of relativistic effects, magnetic substates and finite size of the nucleus. The 1.76 MeV E0 transition in 90Zr (90Sr source) and the 1.77 MeV M1 transition in 207Pb (207Bi source) have been investigated experimentally using the essentially improved setup at the double-ORANGE β-spectrometer of GSI. The measurements prove the capability of the setup to cleanly identify the IPC pairs in the presence of five orders of magnitude higher β− and γ background from the same source and to yield essentially background-free sum spectra despite the large background. Using the ability of the ORANGE setup to directly determine the opening angle of the e+e−–pairs (Θe+e−), the angular correlation of the emitted pairs was measured within the range covered experimentally (40°≤Θe+e−≤ 180°). In the 90Zr case the correlation could be deduced for a wide range of energy differences E Δ of the pairs (−530 keV ≤E Δ≤ 530 keV). The 90Zr results are in good agreement with recent theory. The angular correlation deduced for the M1 transition in 207Pb is in strong disagreement with theoretical predictions derived within the Born approximation and shows almost isotropic character. This is again in agreement with the new theoretical results.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 225 (1968), S. 71-77 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1434-601X
    Keywords: 14.60.Cd ; 25.70.Cd ; 25.70.Ef
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present the results obtained from a series of ρ+ρ−-coincidence measurements in heavy-ion collisions using the double-Orangeβ-spectrometer at GSI. The collision systems U+U, U+Pb, and U+Ta were investigated at bombarding energies close to and slightly above (U+Ta) the Coulomb barrier. For all systems studied, very narrow (FWHM−20 keV) ρ+ρ− lines were observed in the sum-energy spectra, with kinetic energies ranging from ∼555 keV to ∼810 keV, superimposed on a continuous distribution mainly due to uncorrelated ρ+ρ− emission. Particularly in the U+Ta system, a pronounced sum-energy line appears at ∼634 keV, predominantly in deep-inelastic collisions. In some cases (e.g. U+Pb) the line characteristics is consistent with a two-body decay mode of an emitter which moves with the c.m. velocity of the colliding ions. However, other lines, and in particular the 634 keV line (U+Ta), exhibit a rather isotropical opening-angle distribution whereas their energy is unequally shared between positrons and electrons, thus being in clear disagreement with this scenario. In general, the data preclude an emission from the separated (moving) nuclei, and, in the latter cases, provide evidence that the e+e−-pair decay occurs in the vicinity of the Coulomb field of a third heavy (positively charged) partner having only a small transverse velocity (|v|⊥〈0.02c)
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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