Bibliothek

feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Artikel: DFG Deutsche Nationallizenzen  (32)
  • 1995-1999  (15)
  • 1980-1984  (16)
  • 1930-1934  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology and Plant Molecular Biology 47 (1996), S. 509-540 
    ISSN: 1040-2519
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Biologie
    Notizen: Abstract Plant gene responses to changing carbohydrate status can vary markedly. Some genes are induced, some are repressed, and others are minimally affected. As in microorganisms, sugar-sensitive plant genes are part of an ancient system of cellular adjustment to critical nutrient availability. However, in multicellular plants, sugar-regulated expression also provides a mechanism for control of resource distribution among tissues and organs. Carbohydrate depletion upregulates genes for photosynthesis, remobilization, and export, while decreasing mRNAs for storage and utilization. Abundant sugar levels exert opposite effects through a combination of gene repression and induction. Long-term changes in metabolic activity, resource partitioning, and plant form result. Sensitivity of carbohydrate-responsive gene expression to environmental and developmental signals further enhances its potential to aid acclimation. The review addresses the above from molecular to whole-plant levels and considers emerging models for sensing and transducing carbohydrate signals to responsive genes.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    facet.materialart.
    Unbekannt
    Leiden : Periodicals Archive Online (PAO)
    Journal for the Study of Judaism in the Persian, Hellenistic, and Roman Period. 12 (1981) 110-112 
    ISSN: 0047-2212
    Thema: Geschichte , Theologie und Religionswissenschaft
    Notizen: Reviews
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Digitale Medien
    Digitale Medien
    Oxford BSL : Blackwell Science
    Alimentary pharmacology & therapeutics 11 (1997), S. 0 
    ISSN: 1365-2036
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background: Ranitidine hydrochloride (Zantac) is one of the most extensively studied and widely used drugs of all time. This has provided an excellent opportunity to define its safety profile. Methods: Data from 189 controlled clinical trials in which more than 26000 patients received daily doses of ranitidine for 4 weeks or more were reviewed. More than 80% of patients were treated with up to 300 mg ranitidine daily; the remaining patients received doses of up to 1200 mg daily. Eighty-seven trials were placebo controlled. Analyses of post-marketing surveillance and a database of all spontaneously reported adverse events were also evaluated. Results: Overall in the clinical trial programme adverse events were reported by 20% of those receiving ranitidine compared with 27% of those receiving placebo. The pattern of events was similar in all treatment groups with no evidence of dose-related toxicity in regimens encompassing an eightfold range of therapeutic doses. Similarly in a programme of studies designed to evaluate a dose of ranitidine of 75  mg for non-prescription (over-the-counter) use in the treatment of heartburn, ranitidine was not associated with an adverse event profile distinct from that of placebo. Analysis of spontaneously reported adverse event data allowed identification of rare idiosyncratic events. Conclusions: Review of data from a large population of controlled clinical trials with analyses of postmarketing surveillance studies and spontaneously reported adverse events confirmed the excellent safety profile of ranitidine.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    ISSN: 1600-5740
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 6
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 339 (1980), S. 0 
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 7
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 349 (1980), S. 0 
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 8
    ISSN: 1432-2323
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: 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.
    Kurzfassung: 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.
    Notizen: 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.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Oecologia 45 (1980), S. 390-395 
    ISSN: 1432-1939
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: 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.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 10
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 290 (1933), S. 167-176 
    ISSN: 1432-2307
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Zusammenfassung In 15 von 46 mit virulenten Pneumokokken infizierten Tieren wird 4–48 Stunden nach der Infektion eine Glomerulitis beobachtet. Diese Glomerulitis entspricht in den wesentlichen Kennzeichen der akuten Glomerulonephritis des Menschen bei 9 Kaninchen: sie ist streng diffus, besteht vorwiegend aus einer proliferativen Endothelreaktion, die Zeichen von Zellschädigung fehlen. Anzeichen einer der produktiven Glomerulusveränderung voraufgehenden Durchblutungsstörung der Glomeruli fehlen. Bei 6 Kaninchen findet sich dieselbe Veränderung beschränkt auf wenige Schlingen weniger Glomeruli. Die erhobenen Befunde deuten darauf hin, daß die akute diffuse Glomerulonephritis des Kaninchens aufzufassen ist als eine primäre Endothelreaktion, die, ausgelöst durch direkte Einwirkung auf die Kapillarendothelien, sich in kurzer Zeit über die Capillaren aller Glomeruli ausbreitet und ihrerseits zu Zustandsänderungen im und später zu Obliteration des Capillarraumes führt.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...