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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 5020-5026 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einem unausgewählten Obduktionsgut wurde die spezielle und funktionelle Pathomorphologie der Epithelkörper untersucht und dazu bei 589 Sektionen 1637 Nebenschilddrüsen präpariert. Klinisch war bei keinem der Patienten ein primärer oder sekundärer Hyperparathyreoidismus diagnostiziert worden, nur in etwa 10 Fällen von Hämodialysepatienten war ein sekundärer Hyperparathyreoidismus bekannt. Bei etwa 33% der Sektionen wurden pathologische Veränderungen der Epithelkörper gefunden: 3 Hauptzellenadenome, 3 Adenome mit begleitender Hyperplasie der übrigen Drüsen, 12 primäre noduläre Hyperplasien, darunter 6 Mikroadenome und 146 Fälle mit sekundärer regulativer Hyperplasie der Nebenschilddrüsen. Weiterhin wurden bei der stufenweise histologischen Aufarbeitung der Drüsen cysten, eitrige Parathyreoiditiden, pseudolipomatöse Hyperplasien, Carcinommetastasen, hämorrhagische Infarzierungen und Amyloidablagerungen gesehen. Die auffallend große Gruppe der sekundären Hyperplasien (etwa 20% der Sektionen) wurde nach Gewicht und Cytologie der Drüsen in 3 Schweregrade eingeteilt. Die erste Gruppe (118 Fälle) war durch eine fehlende Altersinvolution und das Vorherrschen aktivierter Hauptzellen im Parenchym gekennzeichnet. Die statistische Auswertung der anderen Autopsiebefunde, insbesondere der Histomorphologie des Knochens, ließ erkennen, daß die Epithelkörper dieser Gruppe eine geringe Aktivitätssteigerung aufwiesen, die meistens mit pathologischen Nierenbefunden verknüpft war und im Knochen geringe Umbauvorgänge im Sinne eines regulativen Hyperparathyreoidismus zeigte. Die Mikroadenome ließen verschiedene Grade der endokrinen Aktivität erkennen, wie an den morphologischen Veränderungen des Skelettsystems festzustellen war und die ganz der unterschiedlichen Zellpopulation des Drüsenparenchyms (dunkle oder ruhende Hauptzellen bzw. aktivierte Hauptzellen und kleine wasserhelle Zellen) entsprachen. Der diffusen oder nodulären Hyperplasie oxyphiler (onkocytärer) Zellen konnte keine spezifische endokrine Funktion zugeordnet werden, außer ihr vermehrtes Vorkommen im Alter und bei allgemeiner Arteriosklerose, insbesondere bei weiblichen Patienten.
    Notes: Summary 1637 parathyroid gland dissections were performed on 589 unselected autopsy preparations in order to study both pathomorphology and functional aspects in an unseleeted group of patients. In no case had primary or tertiary hyperparathyroidism been suspected clinically; but in about 10 patients on chronic hemodialysis, a secondary hyperplasia of the glands was known. In about 33% of the cases pathological changes were observed: 3 chief cell adenomas, 3 adenomas combined with hyperplasia, 12 primary nodular hyperplasias including 6 microadenomas and 145 cases with secondary regulative hyperplasia. Cysts, purulent parathyroiditis, lipomatous pseudohyperplasia, metastases of carcinomas, hemorrhagic infarctions and amyloidosis were also detected in serial sections of the parathyroid glands. The remarkably large group of secondary hyperplasias (about 20%) was divided into 3 categories according to weight and cytology. The first category (118 cases) was characterized by a lack of the normal age-related involution of the parenchyma and prevalence of light (active) chief cells. Statistical evaluation of the other autopsy findings, histomorphology of the bone in particular, led to the conclusion that this group represented a slightly activated gland with possibly reversible hyperplasia, mostly connected with pathological alterations in the kidney and with minimal changes in bone morphology consistent with hyperparathyroidism. The microadenomas displayed different levels of endocrine activity as demonstrated by bone histology in accordance with the cytology of the adenomas (dark or resting chief cells versus active chief cells and waterclear cells). No specific alterations with respect to endocrine function could be attributed to diffuse and nodular hyperplasia of oxyphil (oncocytic) cells except their increase with age and arteriosclerosis, especially in women.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2307
    Keywords: Chronic renal insufficiency ; Hemodialysis ; Arteries ; Contracted kidneys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Arterienstrecken in geschrumpften Nieren von Patienten mit und ohne Hämodialysebehandlung wurden histologisch und morphometrisch untersucht, um die Wirkung der chronischen Hämodialyse auf die Nierengefäße bei chronischer Niereninsuffizienz zu erfassen. Die Dialysegruppe besteht aus 33 Patienten, von denen 28 Präparate aus beidseitigen Nephrektomien und 5 aus autopisch entnommenen Nieren untersucht wurden. Die Kontrollgruppe sind 21 Fälle von chronischer Niereninsuffizienz, die ohne Dialysebehandlung urämisch verstorben sind. Statistisch wurden zum einen die Meßwerte entsprechender Gefäßstrecken zwischen Dialyse- und Kontrollgruppe verglichen, zum andern eine Korrelationsmatrix nach dem sogenannten BMD- 03D-Programm aufgestellt, um die Einflüsse klinischer Befunde, wie bekannte Dauer der Nierenerkrankung und Niereninsuffizienz sowie Dauer und Höhe der Hypertonie auf die Nierengefäße für jede Patientengruppe getrennt zu berücksichtigen. Nach diesen Ergebnissen wird die Entwicklung einer Intimafibrose in den Arterien geschrumpfter Nieren durch die Hämodialysebehandlung entscheidend gefördert. Die Befunde werden durch eine zusätzliche Minderdurchblutung der geschrumpften Nieren während der Dialysezeit erklärt, weil es vergleichbare Beispiele in anderen Gefäßregionen gibt.
    Notes: Summary Histologic and morphologic methods were employed to study the influence of chronic hemodialysis on kidney vessels in chronic renal insufficiency. Arteries of contracted kidneys from patients with and without hemodialysis treatment were investigated. The dialysis group was made up of 33 patients, 28 having undergone bilateral nephrectomy and 5 having died. The control group consisted of 21 patients with chronic renal insufficiency, who died in uremic coma without prior hemodialysis. A statistical evaluation was done by comparing measurements from corresponding arteries in the dialysis- and control groups. The correlation pattern from a BMD 03D-program, in which each group was separately assessed for the possible influence of various clinical findings, was determined. Clinical influences taken into account included the course of the kidney disease, grade of renal insufficiency, duration and degree of hypertension as affecting the renal arteries. The statistical results showed that hemodialysis treatment, even taking clinical data into consideration, influenced the development of intimal fibrosis in the arteries of contracted kidneys in an increasing positive manner. Decreased perfusion of the kidneys during hemodialysis suggested as a possible cause. The examination of early lesions in renal arteries following short-term dialysis treatment lends support to this possibility. Here edema and proliferation of the intimal cells in the arteries, similar to that in vessels having a reduced blood flow, is observed.
    Type of Medium: Electronic Resource
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  • 4
    facet.materialart.
    Unknown
    London, etc. : Periodicals Archive Online (PAO)
    Slavonic and East European review. 52:129 (1974:Oct.) 635 
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 111 (1992), S. 66-69 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Man-made bone implant materials as substitutes for autogenic spongiosa transplantation are reviewed, specifically materials made from collagen. The intra- and extracellular biosynthesis of collagen is described. Manufacture, properties and indications of sterile Collagen-fleeceTM, a well proven surgical biomaterial prepared from porcine collagen, is presented. Further research led to the development of a new bone-replacement material called Collapat.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of porous materials 2 (1995), S. 331-339 
    ISSN: 1573-4854
    Keywords: zeolitic films ; pulsed laser deposition ; molecular recognition ; sensors ; membranes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Pulsed Laser Deposition is used to deposit zeolitic films onto a substrate. Using this technique, thin films are formed using both mordenite and faujasite targets. The target application for the films was the development of gas-selective sensors. These films are comprised of small crystallites embedded in an amorphous matrix. The amorphous material is microporous having pore sizes on the order of those in the parent zeolites. These pores are oriented perpendicular to the substrate. Pore orientation coupled with the high porosity provides a thin film with a potential for high gas throughputs. Quartz crystal microbalances coated with the material have been tested for gas uptake and have shown to discriminate between isomers of small molecules. Beyond sensors, the zeolitic films may hold promise for such applications as membranes.
    Type of Medium: Electronic Resource
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