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  • 11
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 33 (1977), S. 319-321 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary During the hatching period, the Rohon-Beard cells of Salmo gairdneri showed definite structural maturity of their perikarya, which is in contrast to the amphibian species investigated, where neuronal maturation of the Rohon-Beard cells is finished only in later — posthatching — developmental stages.
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Mathematische Zeitschrift 30 (1929), S. 108-130 
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Mathematische Zeitschrift 26 (1927), S. 744-756 
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The authors report on the immuno electron microscopic demonstration of Concanavalin A-receptors on the erythrocyte membrane. Immuno freeze-etching studies evidenced a focal arrangement of Concanavalin A-receptors on intact erythrocytes as well as on erythrocyte ghosts. Obviously hemolysis by distilled water does not produce changes in the pattern of distribution of Concanavalin A-receptors whereas slight aggregation of plasma membrane intramembraneous particles occured. No unambigous spatial relationship between Concanavalin A-receptors and the plasma membrane intramembraneous particles (intrinsic proteins) of erythrocytes could be observed.
    Notes: Zusammenfassung Es wird über den immun-elektronenmikroskopischen Nachweis der Concanavalin A-Rezeptoren der Erythrozytenmembran berichtet. Die Immun-Gefrierätzungsuntersuchungen zeigten, daß die Concanavalin A-Rezeptoren sowohl der intakten Erythrozyten als auch der Erythrozytenschatten herdförmig verteilt sind. Die Aqua dest.-Hämolyse führt offenbar zu keiner Umverteilung der Concanavalin A-Rezeptoren, während eine geringfügige Aggregation der intramembranösen Partikeln der Plasmamembran eintrat. Eine eindeutige räumliche Beziehung der Concanavalin A-Rezeptoren zu den intramembranösen Partikeln (intrinsic proteins) der Plasmamembran der Erythrozyten konnte nicht beobachtet werden.
    Type of Medium: Electronic Resource
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  • 15
    ISSN: 1433-0385
    Keywords: Keywords: Pancreatic cancer – Portal vein resection – Intraportal endovascular ultrasound. ; Schlüsselwörter: Pankreascarcinom – Portalvenenresektion – endovasculärer Ultraschall.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. Die Tumorinfiltration der V. portae bei duktalen Adenocarcinomen des Pankreaskopfes gilt klassischerweise als Inoperabilitätskriterium. Trotz operationstechnischer Fortschritte auf dem Gebiet der Pfortaderresektion im Rahmen von Whipple-Operationen mit akzeptaler Letalität und Morbidität kann eine Gefäßresektion bei Infiltration nicht prinzipiell empfohlen werden. Problematisch ist vor allem die präoperative Sicherung einer eventuell vorliegenden Gefäßinfiltration, häufig sieht sich der Chirurg erst intraoperativ mit der Situation einer makroskopischen Pfortaderinfiltration bzw. Tumoradhärenz konfrontiert. Im Zeitraum von 1986 bis 1995 wurde an unserer Klinik bei 105 Patienten mit duktalem Adenocarcinom des Pankreaskopfes eine Whipple-Operation vorgenommen. In 8 Fällen erfolgte bei makroskopischer Tumorinfiltration bzw. Tumoradhärenz und unauffälliger präoperativer Diagnostik mittels indirekter Portographie und CT eine partielle Pfortaderresektion. In 4 der 8 Fälle fand sich eine tatsächliche, histologisch nachweisbare Infiltration der V. portae bis in die inneren Gefäßwandschichten, während die übrigen Fälle keine bzw. lediglich eine Adventitiainfiltration zeigten. Die Patienten ohne histologischen Nachweis einer tatsächlichen Gefäßinfiltration wiesen eine deutlich längere Überlebenszeit (27,75 Monate) gegenüber den Patienten mit histologischer Tumorinvasion in die V. portae (6,67 Monate) auf. Neuere Untersuchungen haben gezeigt, daß der endovasculäre, intraportale Ultraschall (IPEUS) einen deutlichen Informationsgewinn bezüglich der Frage einer vorliegenden Pfortaderinfiltration bieten kann. Auch wenn diese Untersuchung derzeit nicht als Standarddiagnostik gelten kann, so besteht die Möglichkeit, bei entsprechender Indikation hierdurch mit hoher Sensitivität und Spezifität eine tatsächliche Gefäßinfiltration zu erkennen. Kann mittels endovasculärem Ultraschall eine Tumorinfiltration in die V. portae ausgeschlossen werden, so zeigen unsere Ergebnisse, daß Patienten mit makroskopischer Tumoradhärenz tatsächlich von einer partiellen Pfortaderresektion profitieren.
    Notes: Abstract. Tumor invasion of the portal vein by ductal adenocarcinoma of the pancreatic head is classically known as a criterion for inoperability. Despite improvement in operation techniques for portal vein resection during Whipple's procedure and acceptable mortality and morbidity, in the case of uncertain tumor infiltration vascular resection cannot be recommended in general. The problem is the preoperative detection of tumor infiltration of the portal vein. Often the surgeon is confronted with unsuspected macroscopic portal vein infiltration or tumor adhesion during the operation. Between 1986 and 1995 105 patients underwent Whipple's procedure for ductal adenocarcinoma of the pancreatic head in our department. In eight of these cases partial portal vein resection was performed because of macroscopic tumor infiltration or tumor adhesion. In all eight cases the preoperative diagnostic procedures with CT and portography did not show any suspicion of tumor infiltration. In four of the eight cases histological tumor infiltration of all vascular layers was found. In the others we found no or only adventitial tumor invasion. The patients without tumor infiltration of the portal vein showed a survival time after surgery of 27.78 months in contrast to 6.67 months in the group with histologically proven tumor infiltration. Endovascular, intraportal ultrasound (IPEUS), a new diagnostic procedure, can give helpful information regarding portal vein involvement. Although the IPEUS is not a standard diagnostic procedure it was shown to detect portal vein infiltration with high sensitivity and specificity. Our results indicate that in such cases where portal vein infiltration has been excluded by IPEUS, patients with macroscopic tumor adhesion do benefit from partial portal vein resection.
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 374 (1977), S. 27-44 
    ISSN: 1432-2307
    Keywords: Coronary artery aneurysms ; Mucocutaneous lymph node syndrome ; Kawasaki's disease ; Infantile polyarteritis nodosa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In recent years large numbers of the so-called “mucocutaneous lymph node syndrome” or “Kawasaki's disease” have been described by Japanese workers, but instances of this disorder are only now being reported as isolated cases by European or North American physicians. The disease has, therefore, been considered to be a new entity. One of its most striking features is the development of aneurysms of the coronary arteries in infants or children, which may lead to sudden death. Aneurysms of the coronary arteries in childhood are rare, and hence it was considered relevant to report six such cases, and to examine their possible relationship to Kawasaki's disease. The pathological changes underlying the latter disorder are not well known; they are considered to be indistinguishable from infantile polyarteritis nodosa. A diagnosis of polyarteritis nodosa was also thought to be most likely to apply in the cases presented here, particularly in view of the frequency with which aneurysms of the coronary arteries have been found in this disorder. In the absence of valid pathological distinctions between Kawasaki's disease and infantile polyarteritis nodosa, the question arises whether these entities are, in fact, different, and whether Kawasaki's disease is the new entity it is assumed to be.
    Type of Medium: Electronic Resource
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  • 17
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    Unknown
    New York : Periodicals Archive Online (PAO)
    Current history and Forum. 31:2 (1929:Nov.) 279 
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  • 18
    facet.materialart.
    Unknown
    New York : Periodicals Archive Online (PAO)
    Current history and Forum. 31:2 (1929:Nov.) 279 
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 59 (1979), S. 177-187 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The central nervous systems of web-building spiders (Araneidae, Agelenidae) and hunting spiders (Lycosidase, Salticidae) were tested for non-specific and specific phosphatases. Acid phosphatase exhibited weakly to moderately positive reactions in the neuronal cell bodies and in the neuropile fibre mass of all species investigated. Alkaline phosphatase could only be demonstrated in the external and internal neural lamellae of the brain and ventral cord of several specimens of the araneid species investigated. Tests for thiamine pyrophosphatase were negative with both the lead and calciumcobalt methods. Distinctive positive reactions for adenosine triphosphatase were visible in the nervous system of all the species used, being especially strong in the optic ganglia of the hunting spiders. The demonstration of adenosine triphosphatase was only possible when applying the calcium-cobalt method after Padykula and Herman, while the lead method after Wachstein and Meisel did not produce any staining reaction at all. Controls of the histochemical reaction showed that the enzyme was activated by Ca2+ and inhibited by sulphydryl destroying reagents (e.g. PCMB), but was insensitive to ouabain. It could be probably classified as a mitochondrial proton-translocating adenosine triphosphatase.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 128 (1978), S. 247-259 
    ISSN: 1432-1076
    Keywords: Umbilical artery ; Birth ; Neonatal ; Blood vessel ; Structure ; Closure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The structure of the fully-patent umbilical artery and rearrangement of its structural elements with postnatal closure were examined in 10 centimeter long umbilical cord segments which were double-clamped at different time intervals after delivery. The fully-patent umbilical artery consists of two main layers: an outer layer of circularly arranged smooth muscle cells and an inner layer which shows rather irregularly and loosely arranged cells embedded in abundant metachromatic ground substance. No predominantly longitudinal arrangements of cells and fibers reported by earlier investigators could be identified in the inner layer. Closure of the umbilical arteries is initiated by numerous localized contractions which are mainly formed by muscle cells of the outer circular layer. Ultimate closure of larger segments of the umbilical arteries is also mainly produced by contractions of the outer layer. In contrast, the inner layer (which is rich in ground substance) seems to serve mainly as a plastic tissue which can easily be shifted in an axial direction and then folded into the narrowing lumen to complete closure. Electron microscopy reveals that the cells of this layer represent rather poorly differentiated smooth muscle cells which contain only a few tiny myofilaments and can therefore hardly contribute actively to the process of closure.
    Type of Medium: Electronic Resource
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