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  • 1
    Electronic Resource
    Electronic Resource
    Preparation and Characterization of Head-to-Head Polymers. 5. Head-to-Head Polystyrene (1977)
    s.l. : American Chemical Society
    Macromolecules 10 (1977), S. 1331-1339 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma60060a032
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison between the calculated and measured energy transfer rates of the 4S3/2 state in Er3+-doped fluorozirconate glasses (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 1900-1906 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The dependence of the fluorescence lifetime of the 4S3/2 state of the Er3+ ion on the ErF3 concentration was measured in fluorozirconate glasses at room temperature. Energy transfer rates were calculated from optical parameters assuming that the Er3+ ions in fluorozirconate glasses were dispersed as the cubic, bcc, or fcc structure, and were inserted into the rate equation. The dependence of the total transition rate of the 4S3/2 state of the Er3+ ion on the ErF3 concentration was calculated by using the rate equation and compared with the total transition rate measured by the lifetime experiment. Although many studies have reported the energy transfer rates in various rare-earth ions, the reliability of the calculated energy transfer rates has been hardly discussed. The energy transfer rate can be derived from the total transition rate. The energy transfer rate estimated from the rate equation calculation was compared with the energy transfer rate obtained from the lifetime measurement. It could be shown that the calculated energy transfer rate assuming that the Er3+ ions were dispersed as the cubic structure was closer to the measured energy transfer rate than that as the bcc and fcc structures. With increasing the ErF3 concentration, the calculated energy transfer rate when the Er3+ ions were dispersed as the cubic structure was comparable to the measured energy transfer rate. It was suggested that at the lower concentration of ErF3 (≤2 mol %), we needed to use the distance between Er3+ ions which was shorter than that as the cubic structure in the calculation of the energy transfer rate. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1303742
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  • 3
    Electronic Resource
    Electronic Resource
    Manometric and hormonal changes after distal partial gastrectomy (2000)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 14 (2000), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Alkaline oesophagitis attributable to duodenal mechanisms may induce oesophageal carcinogenesis in a rat reflux model. Aim: To investigate the mechanism of the regurgitation after distal partial gastrectomy. Methods: Oesophageal manometry was used in 16 patients before and after distal partial gastrectomy with reconstruction by Bilroth methods. Serum concentrations of four gastrointestinal hormones were measured by radioimmunoassay in 10 gastrectomy patients and nine healthy volunteers before and after a standardized meal. Results: The lower oesophageal sphincter pressure was reduced to 83% after surgery. The amplitude and duration of the peristaltic waves tended to be increased, and the velocity tended to be less after surgery (amplitude 120%, duration 114%, velocity 88%). Interrupted waves appeared more frequently after surgery. The manometric changes in gastrectomized patients are considered to be disadvantageous relative to regurgitation. After surgery, gastrin and pancreatic polypeptide were completely abolished postprandially, whereas cholecystokinin and neurotensin were significantly increased. Conclusion: The hormonal changes should have a suppressive effect on the lower oesophageal sphincter. Both the manometric and the hormonal changes may exacerbate reflux oesophagitis after distal partial gastrectomy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2036.2000.014s1166.x
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  • 4
    Electronic Resource
    Electronic Resource
    S-IV-05 
Study in Hybridized Tissue Engineered Trachea by Using Acellular Trachea Scaffold (2004)
    Oxford, UK; Malden, USA : Blackwell Science Inc
    Wound repair and regeneration 12 (2004), S. 0 
    Details
    ISSN: 1524-475X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aim: A method for preparing acellular trachea scaffold and its effectiveness were investigated by using rabbits and dogs Methods: The sacrificed dog or rabbit trachea was collected. The spiral stent of stainless steel was inserted in the obtained trachea. To remove all of cellular components in tissues, the trachea was rinsed with sterilized 0.5% Triton X-100 for 24 to 48 hours at ambient temperature and then for removing the detergents completely using fresh water. The acellular trachea obtained was lyophilized and sterilized by ethylene oxide gas. Before implantation, the lyophilized acellular trachea was soaked in phosphate buffered saline containing 0.5% gelatin and other adhesive molecules for 2 to 18 hours at 37 degree. After 15 mm of rabbit neck trachea was removed surgically under anesthesia, the same length of reengorged acellular rabbit trachea was implanted the removed region. In the case of dog, 50 mm of thoracic trachea was removed under the mechanical ventilation and then the same length of reengorged acellular trachea was implanted by technique of end to end anastomosis. The implanted trachea was rapped by omentum. The effectiveness of acellualr scaffold on implanted-animals was evaluated by endoscope finding. Results: 1) The rabbits implanted reengorged-acellular trachea survived for minimum 10 days and maximum 60 days. It was suggested that the cause of death was the infection of implantation region. 2) The dog implanted reengorged-acellular trachea survived for over 60 days at least. The cause of death was strangulated hernia. 3) The acellular trachea containing various growth factors or cultured with fibroblasts was not always effective. Discussion: It is not necessary for the animal implanted acellular trachea to be administered the immunodepressants such as the animal implanted cryopreserved trachea. From these results, the tissue engineered acellular trachea may be more effective than the cryopreserved trachea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1067-1927.2004.abstractm.x
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  • 5
    Electronic Resource
    Electronic Resource
    A new mode of X-ray bursts from MXB1730–335 (1980)
    [s.l.] : Nature Publishing Group
    Nature 283 (1980), S. 358-360 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The observation was carried out with an X-ray burst monitor which consists of two sets of rotating modulation collimators: two coarse modulation collimators (CMC 1,2) and a fine modulation collimator (FMC 1) with a field of view of 17.4 and 5.8 (FWHM), respectively. Positions of steady sources and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/283358a0
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  • 6
    Electronic Resource
    Electronic Resource
    Method of producing tissue sections from endometrial scrapings (2002)
    Oxford UK : Blackwell Science Ltd.
    Cytopathology 13 (2002), S. 0 
    Details
    ISSN: 1365-2303
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Method of producing tissue sections from endometrial scrapings Endometrial cytology is important not only for observing cytological findings, but also for assessing histological architecture. Therefore, we attempted to produce a histological preparation from the sample using an automatic fixation apparatus (ACF 1000) which employs a membrane filter method.After observation of the cytological features, the cover slip was removed and a paraffin-embedded section was prepared.Producing a histological section from a cytological specimen prepared with the ACF 1000 apparatus was more useful and easier than with the techniques described to date. Peelability of the cell was avoided by using a silane-coated membrane filter. Observation of the same cell cluster as that observed in the cytological sample was also facilitated in the histological section by this technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2303.2002.00364.x
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  • 7
    Electronic Resource
    Electronic Resource
    Alterations in the collagen framework of osteoarthritic cartilage and subchondral bone (1981)
    Springer
    International orthopaedics 5 (1981), S. 47-52 
    Details
    ISSN: 1432-5195
    Keywords: Osteoarthritis ; Collagen framework ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Des prélèvements obtenus à partir de genoux humains arthrosiques et de genoux de chien porteurs de lésions arthrosiques expérimentales ont permis l'étude de la charpente de collagène du cartilage articulaire et de l'os sous-chondral, par microscopie conventionnelle et par microscopie électronique. Dans les lésions dégénératives, les fibrilles de collagène du cartilage ont une orientation radiale, alors qu'elles sont habituellement groupées en faisceaux. En cas de lésions étendues, le cartilage présente souvent des clivages ou des fissures menant jusqu'aux couches calcifiées. Les fibrilles de collagène du cartilage arthrosique se fondent dans la plaque osseuse souschondrale, rendant la jonction ostéo-cartilagineuse irrégulière ou mal définie. L'orientation trabéculaire de l'os sous-chondral se modifie en fonction de l'altération du cartilage articulaire. Ces modifications réactionnelles montrent que, même au niveau ultrastructural, l'architecture de l'os sous-chondral reflète la dégénérescence cartilagineuse.
    Notes: Summary Specimens obtained from human osteoarthritic knee joints and dog knees with experimentally induced osteoarthritis were used to study the collagenous framework of articular cartilage and subchondral bone in relation to osteoarthritic changes using scanning electron microscopy and light microscopy. Degenerative articular cartilage in osteoarthritic joints showed radial orientation of the collagen fibrils, which were usually discernible as fibrillar bundle formations. Cartilage with extensive lesions often showed cleavages or fissures down to the calcified layer. The cartilagenous collagen fibrils in osteoarthritic specimens merged into the subchondral bone plate making the tidemark and the osteochondral junction irregular or obscure. The trabecular orientation of subchondral bone changed with alteration in the articular cartilage and with reactive changes in the subchondral bone, showing the effect of cartilaginous degeneration on its ultrastructure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00286099
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  • 8
    Electronic Resource
    Electronic Resource
    Spin-down episode of the X-ray pulsar Vela X-1 (1981)
    [s.l.] : Nature Publishing Group
    Nature 290 (1981), S. 572-573 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We observed Vela X-l in 8.1-21.8 March (UT) 1979 and in 5.2-24.0 March (UT) 1980 from Hakucho, with its spin axis detectors in the energy range 1-22 keV. The binary period, the duration of eclipse, the pulse profile and its energy dependence are in good agreement with earlier results. The X-ray ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/290572a0
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  • 9
    Electronic Resource
    Electronic Resource
    Clinical pathology of malignant meningiomas (1984)
    Springer
    Acta neurochirurgica 73 (1984), S. 179-191 
    Details
    ISSN: 0942-0940
    Keywords: Meningioma ; malignant tumour ; papillary meningioma ; anaplastic meningioma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Nineteen cases of malignant meningiomas-seven haemangiopericytic, two papillary and ten of the anaplastic type-were examined clinicopathologically. These were ten male and nine female patients and eleven of these received reoperation for recurrence. Tumours of the hemangiopericytic type had similar angiographic and macrooscopic features and malignant characteristics were found microscopically in some tumours. There were intratumoral cysts in both cases of the papillary type and these tumours had a high cellularity, an increased number of mitosis, haemorrhage and partially haemangiopericytic patterns. Six cases of the anaplastic type had changed from a benign type at recurrence and those tumours had variable features radiographically and macroscopically. Lack of typical arrangement, a large number of mitoses, increased cellularity, focal necrosis, brain infiltration, pleomorphism and anaplasia were found histologically. Four cases of the anaplastic type were diagnosed at the first operation and these tumours had apparently similar angiographic and macroscopic features, but with variable organoid structures and malignant forms, microscopically. Electron microscopic features are also described. In malignant meningiomas, the recurrence rate was high even in cases of total removal. The outcome for these patients was good in the papillary type, relatively good in the haemangiopericytic type and poor in the anaplastic type. From these results therapeutic indications are also suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01400851
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  • 10
    Electronic Resource
    Electronic Resource
    Characteristic findings of metrizamide CT cisternography in epidermoids (1984)
    Springer
    Acta neurochirurgica 73 (1984), S. 207-211 
    Details
    ISSN: 0942-0940
    Keywords: Epidermoid ; computed tomography ; CT cisternography ; metrizamide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The characteristic findings of metrizamide CT cisternography in two cases of epidermoid are reported. The main finding was a “cauliflower-like” appearance and was thought to be caused by the irregular interstices of epidermoids. Metrizamide CT cisternography may be helpful in making a diagnosis of an epidermoid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01400854
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