Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 58 (1980), S. 1037-1042 
    ISSN: 1432-1440
    Keywords: Uremic autonomic neuropathy ; Baroreflex ; Efferent sympathetic limb ; Circulatory regulation ; Urämische autonome Neuropathie ; Baroreflex ; Sympathicus ; Kreislaufregulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die urämische autonome Neuropathie führt zu Störungen der Funktion des Baroreflexes. Aus der Literatur geht hervor, daß die wesentlichen Defekte den afferenten Reflexbogen sowie den efferenten cardialen Vagus betreffen, während die sympathische Funktion des efferenten Schenkels intakt bleibt. Eigene Befunde, an chronischen Hämodialysepatienten während Orthostase und Volumenentzug erhoben, belegen ebenfalls eine qualitativ und quantitativ adäquate Antwort des efferenten Sympathicus sowie eine erhaltene Ansprechbarkeit der Rezeptoren des Endorgans. Die autonome Neuropathie disponiert zur symptomatischen Hypotension bei Volumenentzug während der Dialysebehandlung. Zusätzlich führt die Hämodialysebehandlung selbst zu einer noch ungeklärten Hemmung der sympathischen Reaktion auf Volumenentzug. Die autonome Neuropathie disponiert bei Volumenbelastung zur arteriellen Hypertonie.
    Notes: Summary Uremic autonomic neuropathy leads to impaired function of the baroreflex. The main defect, according to literature, is located in the afferent limb of the reflex arc and in the efferent cardiac vagus nerve, whereas the sympathetic part of the efferent arc is still intact. Own results, obtained in hemodialysis patients during orthostasis and volume removal induced sympathetic stimulation, showed a qualitatively and quantitatively adequate sympathetic response and also an adequate end organ receptor response. Autonomic nervous neuropathy predisposes to volume removal related symptomatic hypotension during hemodialysis treatment. In addition hemodialysis treatment per se induces a so far unexplained interference with sympathetic response to volume removal. The autonomic neuropathy also predisposes to development of hypertension in response to volume load.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 349 (1980), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 339 (1980), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    facet.materialart.
    Unknown
    Leiden : Periodicals Archive Online (PAO)
    Journal for the Study of Judaism in the Persian, Hellenistic, and Roman Period. 12 (1981) 110-112 
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1435-2451
    Keywords: Secondary hyperparathyroidism ; Total parathyroidectomy ; Autotransplantation ; Transplantation tumor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 41 Patienten mit chronisch globaler Niereninsuffizienz und sekundärem Hyperparathyreoidismus wurde eine totale Parathyreoidektomie und Autotransplantation von Epithelkörperchengewebe in die fistelfreie Unterarmmuskulatur durchgeführt. Innerhalb von 7–33 Monaten entwickelten 5 Patienten ein Transplantatrezidiv im Unterarm. Die morphologischen und klinischen Aspekte des Transplantathyperparathyreoidismus rücken die Regenerate im Unterarm in die Nachbarschaft eines malignen Wachstums. Bei Abwägung der Erfolge und der Risiken dieses Verfahrens nach 5jähriger Beobachtung kann die Autotransplantation beim sekundären Hyperparathyreoidismus nicht empfohlen werden. Ausschlaggebend ist die hierfür zwar morphologisch vorerst nicht nachgewiesene, aber durchaus vorstellbare Entwicklung eines Transplantatcarcinoms.
    Notes: Summary The results of clinical and morphologic studies performed in 41 patients with chronic, renal failure and secondary hyperparathyroidism, who had total parathyroidectomy and autotransplantation of parathyroid tissue into the forearm muscle are presented. In five cases, 7–33 months after autotransplantation we found transplantation tumors developing in the forearm. Explanted grafts showed invasive growth of parathyroid tissue in the adjacent structures, into the musculature and blood vessels. The increased incidence of mitosis otherwise seen as evidence of malignant neoplasia of parathyroid tumors, indicated atypical focal proliferation of the transplanted tissue. This is justification for not performing transplantations any more in the treatment of renal osteodystrophy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé La récidive de l'hyperparathyroïdisme après parathyroïdectomie (APTX) totale complétée par une auto-transplantation a déjà été rapportée; cependant aucune donnée à propos de l'intervalle de temps séparant la greffe de la récidive et à propos de la morphologie de la récidive n'a été fournie. Seul un cas d'hyperparathyroïdisme primitif après APTX a été bien analysé. Les auteurs ont pratiqué 42 auto-transplantations pour des malades présentant un hyperparathyroïdisme dû à une insuffisance rénale chronique. Le parenchyme parathyroïdien implanté a présenté une hyperplasie typique des cellules principales. Au cours de 4–33 mois, 6 sujets ont vu s'installer une récidive d'hyperparathyroïdisme (HPT) avec des niveaux sériques de iPTH plus élevés au niveau du sang veineux prélevé au niveau du bras siège de la greffe. Ces greffes durent être supprimées. Bien que seulement 20–40 mg de tissu parathyroïdien ait été implanté, le poids des greffons excisés variait de 0,9 à 3,1 grammes. Ces greffons furent examinés au microscope classique et au microscope électronique. La taille et le contenu en DNA des nucléi furent déterminés. Dans tous les cas, une prolifération invasive des cellules parathyroïdiennes au niveau du tissu conjonctif et des muscles fut constatée, et dans 2 cas des aspects mitotiques semblables à ceux caractérisant les néoformations malignes de la parathyroïde furent décelés. De ces constatations cliniques et morphologiques les auteurs tirent les conclusions suivantes: 1. Le traitement chirurgical de l'hyperparathyroïdisme d'origine rénale par parathyroïdectomie complétée par une auto-transplantation peut aboutir à une prolifération rapide du fragment de tissu parathyroïdien greifé. 2. En raison de ce caractère prolifératif, il existe un risque possible d'essaimage de tissu parathyroïdien auto-greffé. 3. L'ablation du greffon peut être difficile et conduire à des interventions chirurgicales répétées et considérables. 4. Devant ce phénomène dont le processus n'est pas parfaitement compris, il convient de préférer la parathyroïdectomie subtotale à la parathyroïdectomie totale avec auto-transplantation pour traiter l'hyperparathyroïdisme rénal.
    Abstract: Resumen La recurrencia del hiperparatiroidismo después de paratiroidectomía total y autotransplante ha sido informada previamente; sin embargo no se han suministrado datos relativos al lapso entre el transplante y la recaída, ni a la morfología. Sólo un caso con hiperparatiroidismo primario con autotransplante ha sido analizado en detalle. Hemos realizado el autotransplante en 42 patientes con hiperparatiroidismo debido a falla renal crónica. El tejido paratiroideo implantado exhibió típica hiperplasia de células principales. En el transcurso de 4 a 33 meses seis pacientes desarrollaron hiperparatiroidismo recurrente con demostración de altos niveles de hormona paratiroidea inmunoreactiva (iPTH) en la sangre venosa del brazo portador del transplante, y los transplantes tuvieron que ser removidos. En cuatro casos fue necesario realizar una segunda y hasta una tercera intervención operatoria antes de lograr la normalización de los niveles de iPTH. Aun cuando sólo se implantaron entre 20 y 40 mg de tejido paratiroideo, los transplantes resecados llegaron a pesar entre 0,9 y 3,1 gramos. Los transplantes removidos fueron examinados mediante microscopía de luz y electrónica, y el tamaño y contenido de DNA del núcleo fueron determinados. En la totalidad de los casos, el material explantado exhibió un definido patrón de crecimiento invasivo hacia los tejidos conectivos y músculos vecinos y en 2 casos se demostraron figuras mitósicas, un hallazgo que simula a una neoplasia maligna de la paratiroides. Con base en nuestras observaciones clínicas y morfológicas hemos formulado las siguientes conclusiones: 1. El tratamiento quirúrgico del hiperparatiroidismo renal por medio de la paratiroidectomía total y autotransplante, inesperadamente puede resultar en un crecimiento muy acelerado del tejido transplantado. 2. Debido al crecimiento invasivo, existe el peligro de una extensión incontrolada del tejido paratiroideo. 3. La remoción del transplante puede resultar difícil y puede necesitar cirugía extensa y repetida. 4. Antes de que este fenómeno pueda ser mejor comprendido, nos abstenemos de recomendar la paratiroidectomía total con autotransplante como alternativa a la paratiroidectomía subtotal en el tratamiento quirúrgico del hiperparatiroidismo renal.
    Notes: Abstract Recurrence of hyperparathyroidism (HPT) following total parathyroidectomy and autotransplantation (APTX) has been reported before. However, no data about the time interval between grafting and relapse and about morphology were given. Only 1 case of primary hyperparathyroidism with APTX has been extensively analyzed. We have performed autotransplantation in 42 patients with HPT due to chronic renal failure. Implanted parathyroid tissue showed typical chief cell hyperplasia. Within 4–33 months, 6 patients developed recurrent HPT with serum iPTH levels being highest in venous blood of the grafted arm. Grafts had to be removed. Although only 20–40 mg of parathyroid tissue had been implanted, removed grafts weighed from 0.9 to 3.1 g. Explanted grafts were examined by light and electron microscopy. The size and DNA content of nuclei were determined. In all cases the explanted material showed a distinct invasive growth into the adjacent connective tissue and muscles and in 2 cases mitotic figures were demonstrated, a finding resembling malignant neoplasia of the parathyroid. From our clinical and morphological observations we draw the following conclusions: 1. Surgical treatment of renal hyperparathyroidism by PTX + Auto-TX unforeseeably may result in very accelerated growth of grafted tissue. 2. Because of invasive growth there exists the risk of uncontrolled spread of parathyroid tissue. 3. Graft removal may turn out to be difficult and possibly necessitate repeated and extensive surgery. 4. Before the observed phenomenon is totally understood, we no longer recommend PTX + Auto-TX as an alternative to subtotal PTX in the surgical treatment of renal hyperparathyroidism.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Oecologia 45 (1980), S. 390-395 
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Seasonal changes in the Crassulacean Acid Metabolism (CAM) activity and growth characteristics of Opuntia humifusa Raf. were examined under midwest climatic conditions. Twenty-four hour studies were done at monthly intervals for two years, with diurnal changes in transpiration, gas exchange, and titratable acidity monitored under natural conditions. CAM activity was observed only from April to September, but occurred regardless of changes in temperature or precipitation. The maximum rate of dark CO2 uptake occurred in May, while greatest acid fluctuations coincided with flowering, new growth, and high tissue water content in June. In spite of conditions favorable for CAM, acidification and rate of dark CO2 assimilation decreased progressively through September as stem water content dropped and shoot production ceased. No CAM was evident during sub-zero winter months and tissue water content decreased to only 65% (Ψ〈-20 bars). Winter survival of plants in test plots was found to be affected by the amount of water received the preceding growing season; the driest group showing the lowest mortality rate. Although spring and autumn were considered periods likely to exhibit CAM, it was not observed during those months just prior to or immediately following winter (Oct. and March). Acid fluctuations were minimal with CO2 being taken up during the day and released at night, indicating some degree of flexibility in the CAM activity of Opuntia humifusa.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary It is shown for some examples that the quantitative interpretation of depth profiles obtained by emission spectrometry with glow discharge excitation (GDOS) seems to be possible by comparative measurements with independent methods, by “extrapolation” of GDOS-results for the bulk, and by investigating commercial reference materials. A high reproducibility of the depth profile measurements was obtained by reducing some effects caused by the electrical power supply, uncontrolled sample temperature, and the influence of air. It could be shown by this method of depth profile analysis that it is possible to give quantitative details (in mg/m2) about the various alloying elements in different layers of the steel surface.
    Notes: Zusammenfassung An einigen Beispielen wird gezeigt, daß mit der Glimmlampenspektrometrie (GDOS) erhaltene Tiefenprofile durch Vergleichsmessungen mit anderen Verfahren (Ionenätzen; chemisches Lösen), durch „Extrapolation“ der an der Probenmatrix erhaltenen Ergebnisse und die Untersuchung von Referenzproben quantitativ interpretierbar sind. Eine hohe Reproduzierbarkeit der Tiefenprofilmessungen wurde durch eine Änderung der Regelkonstanten bei der elektrischen Versorgung der Anregungsquelle, eine Verminderung des Luftzutritts in den Kathodenraum und die Konstanthaltung der Probentemperatur erreicht. Es konnte gezeigt werden, daß diese Tiefenprofilmessungen Angaben über die in verschiedenen Tiefen vorliegenden Anteile der Legierungselemente und der Stahlbegleiter in mg/m2 erlauben.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...