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  • 1995-1999  (11)
  • 1999  (4)
  • 1996  (7)
  • 1
    Digitale Medien
    Digitale Medien
    Epitaxial HgBa2Ca2Cu3Oy films on SrTiO3 substrates prepared by spray pyrolysis technique (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 3423-3425 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: HgBa2Ca2Cu3Oy (Hg-1223) films with a thickness of 1–2 μm and Tc (zero)∼130 K have been fabricated by utilizing a spray pyrolysis technique. X-ray diffraction indicates that the films consist of predominantly Hg-1223 phase grains with c-axis orientation. Moreover, the oscillation photograph taken by a Weissenberg camera confirms that the film grains are in-plane aligned and epitaxially grown on SrTiO3. In electrical transport measurements, the as-fabricated film exhibits a Tc (zero) of 123 K, and a zero-field Jc of 3.7×105 A/cm2 at 77 K. Additional post-annealing at 320 °C for 50 h in flowing oxygen has improved the transport properties as Tc (zero)∼130 K and Jc∼4.4×105 A/cm2 (77 K, 0 T). © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.117280
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  • 2
    Digitale Medien
    Digitale Medien
    Bronchogenic squamous cell carcinomas with invasion along alveolar walls (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 29 (1996), S. 0 
    Details
    ISSN: 1365-2559
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: In bronchogenic squamous cell carcinoma, a growth pattern along the alveolar walls of the peripheral lung parenchyma is unusual. In order better to understand the way tumour cells invade the peripheral lung parenchyma, we studied two cases of squamous cell carcinoma with invasion along the alveolar walls (in 30% to 40% of the area surrounding the tumour). We used immunohistochemical staining with antibodies against pulmonary surfactant, apoproteins (PE-10) and collagen type IV, and electron microscopy. Tumour cells invading the peripheral lung tissue were located between one layer of type II alveolar epithelial cells and the basement membrane of the alveolar walls. These results suggest that the cells of a squamous carcinoma (unlike an adenocarcinoma) have the ability to spread along the basement membrane of the alveolar walls without destroying pre-existing normal peripheral lung parenchyma.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2559.1996.tb01420.x
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  • 3
    Digitale Medien
    Digitale Medien
    Acetabular labral tears: contrast-enhanced MR imaging under continuous leg traction (1996)
    Springer
    Skeletal radiology 25 (1996), S. 349-356 
    Details
    ISSN: 1432-2161
    Schlagwort(e): Key words Acetabular labrum ; Magnetic resonance imaging ; hip ; Gadolinium ; Traction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract  Objective. The objective of this study was to evaluate the effects of continuous leg traction on contrast-enhanced MR imaging of the hip joint and to determine whether MR imaging under these conditions is useful for demonstrating acetabular labral tears. Design and patients. Nineteen hips underwent MR imaging with a T1-weighted spin-echo sequence, followed by MR imaging under continuous leg traction after intravenous injection of gadolinium-DTPA. Joint fluid enhancement and labral contour detection were evaluated. Eleven hips had labral tears shown by conventional arthrography, arthroscopy and macroscopic surgical findings. Assessment of labral tears by MR imaging was correlated with the diagnosis based on these standard techniques. Results and conclusions. Joint fluid enhancement was obtained in all hips at 30 min after injection. Superior and inferior labral surfaces were completely delineated in 1 hip on the unenhanced MR images, and in 7 and 13 hips, respectively, on the enhanced images under traction. The enhanced images under traction depicted 9 of the 11 labral tears. Comparison between the unenhanced image and the enhanced image under traction avoided mistaking undercutting of the labrum for a tear in 4 hips. Contrast-enhanced MR imaging under traction was valuable for detecting labral tears non-invasively and without radiation. Follow-up examinations using this method in patients with acetabular dysplasia can help to clarify the natural course of labral disorders and enable better treatment planning.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002560050094
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  • 4
    Digitale Medien
    Digitale Medien
    MR arthrography of elbow: evaluation of the ulnar collateral ligament of elbow (1996)
    Springer
    Skeletal radiology 25 (1996), S. 629-634 
    Details
    ISSN: 1432-2161
    Schlagwort(e): Key words Elbow ; Ulnar collateral ligament ; Magnetic resonance imaging
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract  Objective. The purpose of this study was to evaluate ulnar collateral ligament (UCL) injury of the elbow in throwing athletes by MRI and MR arthrography. Design. Ten elbows of throwing athletes were examined on both plain MRI and MR saline arthrography and the injuries subsequently surgically proven. Spin-echo (SE) T1-weighted and fast SE T2-weighted coronal images were obtained. Results. The UCL was unclear in all ten cases on T1-weighted MRI. In five cases an avulsion fracture was also found on T1-weighted MRI. On T2-weighted MRI, abnormal high-intensity areas were identified in or around the UCL. On T2-weighted MR arthrography images, extracapsular high-intensity areas, which represent extracapsular leakage, were found in four of five cases with avulsion fracture. At surgery, all these four cases showed avulsion fractures with instability; the other case had a fracture but it was stable and adherent to the humerus. On T2-weighted MR arthrography images, an extracapsular high-intensity area was found in one of the five cases without avulsion fracture. At surgery this patient had a complete tear of the UCL itself. Conclusion. MR arthrography provided additional information for evaluating the degree of UCL injury.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002560050149
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  • 5
    Digitale Medien
    Digitale Medien
    Detection of molecular gas in the quasar BR1202 – 0725 at redshift z = 4.69 (1996)
    [s.l.] : Nature Publishing Group
    Nature 382 (1996), S. 426-428 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] BR1202 - 0725 was found in an optical multi-colour based search15 and is the third-highest-redshift quasar known to date. Subsequent submillimetre observations16'17 revealed significant dust thermal emission towards this object. The amount of dust was estimated to be 109M(: assuming a dust ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/382426a0
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  • 6
    Digitale Medien
    Digitale Medien
    Plexiform schwannoma of the foot (1999)
    Springer
    European radiology 9 (1999), S. 1653-1655 
    Details
    ISSN: 1432-1084
    Schlagwort(e): Key words: Plexiform schwannoma ; Soft tissue tumor ; Plexiform neurofibroma ; CT ; MR imaging
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract. The present report describes a plexiform schwannoma involving the subcutis of the foot in an 8-year-old boy. Gross findings revealed thin fibrous septa in a multilobulated tumor that was partly separated into free body-like nodules in the subcutis. Preoperative CT and MRI failed to delineate this multinodular architecture or free bodies. This is a case presentation including the CT and MR findings associated with plexiform schwannoma.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003300050904
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  • 7
    Digitale Medien
    Digitale Medien
    Fission fragment configurations at the scission point of233U,235U and239Pu(nth,f) (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 117-122 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract In order to estimate the deformation rate of fission fragment at the scission point for thermal neutron-induced fission of233,235U and239Pu, double-velocity and double-energy measurements were carried out. As the result of the estimation of the deformation rate, two types of scission point configurations were found. One type is composed of deformed light and heavy fragments, and the other type is a combination of deformed light and spherical heavy fragments. Mass and total kinetic energy distributions were sorted in two distributions by means of the type of configuration.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02349541
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  • 8
    Digitale Medien
    Digitale Medien
    Negative pion transfer process in a hydrogen-containing gas mixture (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 159-163 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract Annihilation γ-rays of π0 and pionic X-rays were measured in the gas mixtures of H2+Z and CH4+Z systems (Z=He, Ne, Ar and Kr). Pion capture probability of hydrogen atom was obtained from the annihilation γ-ray counts and the capture probability of Z atom was obtained from the pionic X-ray intensities. Transfer rates were determined from the data based on a combined large mesomolecular model. The transfer rates obtained were smaller than the systematics of the Russian group. Difference in the transfer rate between the gas and the liquid phases was found by a comparison of the present results with our previous ones.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02349549
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  • 9
    Digitale Medien
    Digitale Medien
    Two deformation paths in fission of light actinides (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 97-101 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract The correlation among the fission threshold energy, the scission configuration and the mass yield distribution has been studied in proton-induced fission of light actinides. It was found that there exist at least two fission paths from the threshold region to the scission. The elongated scission configuration is related with the fission process that goes over a higher threshold energy and results in a symmetric mass division mode, while the compact scission configuration with the process that experiences a lower threshold and ends up with an asymmetric mass division mode.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02349537
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  • 10
    Digitale Medien
    Digitale Medien
    Mild synthesis of a CuSr2(Y, Ca) Cu2O y superconductor using a sol-gel method (1996)
    Springer
    Journal of materials science 31 (1996), S. 6501-6506 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract A CuSr2(Y, Ca) Cu2O y superconductor was obtained under atmospheric pressure using a sol-gel method. A material including this superconductive phase showed diamagnetic behaviour from 45 K and a drastic decrease of resistance from 51 K. It was found from X-ray diffraction and high-resolution transmission electron microscopy studies that the superconductive crystal has a tetragonal symmetry of a=0.382 nm and c=1.129 nm, and no superstructural ordering was found. However, we cannot completely rule out the possibility of carbon contamination on copper sites. It has been demonstrated that the sol-gel method is a promising route to synthesize high pressure phases of cuprate superconductors.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00356254
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