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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 314 (1992), S. 450-454 
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0309-1651
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0309-1651
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Molecular and Cellular Cardiology 17 (1985), S. 1019-1022 
    ISSN: 0022-2828
    Keywords: Cardiac hypertrophy ; Hypertension ; Ventricular myosin
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 12 (1980), S. 95-96 
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0584
    Keywords: Stem cell concentration ; Bone marrow processing ; Marrow transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Enrichment of bone marrow (BM) aspirates is an important prerequisite prior to in vitro treatment or cryopreservation. In this regard, we have analyzed the results obtained on 190 BM processed by the following 5 techniques: HES sedimentation with centrifugation; COBE 2991 blood cell processor; Ficoll/hypaque (F/H) gradient centrifugation; Continuous flow cell separator (CS 3000 Fenwal); Semicontinuous blood cell separator (Dideco T 90). Each procedure was evaluated by measuring the recovery of nucleated marrow cells (NC), mononuclear cells (MNC), committed progenitor cells (CFUGM), the reduction of BM volume and the removal of red blood cells (RBC) and polymorphonuclear cells (PMN). The results of this comparative study show that F/H gradient on a COBE 2991 cell washer provides the most efficient system for purifying a MNC fraction (89% recovery) from unwanted cells (RBC 〈 2% and PMN 〈 2%) in a very small volume (98% reduction) with a good recovery of CFU-GM (80%).
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Neurological sciences 11 (1990), S. 303-305 
    ISSN: 1590-3478
    Keywords: Cluster headache ; head injury ; subdural hematoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Per quanto noto, una cefalea a grappolo non è mai stata riportata come secondaria ad ematoma sottodurale post-traumatico. Un uomo di 39 anni giungeva alla nostra osservazione con una sintomatologia tipo “cluster headache” a destra, a seguito di una trauma cranico in regione fronto-temporale dx, che avveniva circa 45 giorni prima della nostra osservazione. Una TAC cerebrale dimostrava la presenza di un ematoma cronico sottodurale fronto-temporale dx. Le correlazioni tra trauma cranico e cefalea a grappolo sono discusse, in rapporto all'utilità di eseguire una TAC cerebrale nei pazienti con cefalea a grappolo.
    Notes: Abstract This appears to be the first report of cluster-like headache secondary to posttraumatic subdural hematoma. A 39 year old man consulted us for cluster-like headache on the right side following an injury to the right frontotemporal region some 45 days before. A CT scan revealed a chronic subdural hematoma in the right frontotemporal region. We discuss the possibile relationship between the head injury and the headache and sugĝest the value of CT scanning in patients with cluster headache.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1435-1803
    Keywords: ventricular myosin ; pressure overload ; peptide mapping ; electrophoresis under nondenaturing conditions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Chronic pressure overload induces a redistribution in myosin isoenzymes as demonstrated by Ca++-activated ATPase activity, electrophoresis under non-denaturing conditions and immunohistochemistry. We compared, in two groups of renal hypertensive rats and control rats, the isoenzymic patterns obtained by electrophoresis under non-denaturing conditions with those observed after heavy chains digestion with S. Aureus V8 protease. In the hypertensive animals in which a shift towards the “slow” V2 and V3 isomyosins was evident, peptide mapping always gave origin to a band which was not present in the controls. Since we consider this peptide as a marker of the redistribution towards the “slow” isoforms, peptide mapping according to Cleveland appears to be a simple and useful method to assess differences in isomyosin composition, at least between hypertrophic pressure-overloaded and normal rat ventricles. Moreover, in our experience this technique is simple, the patterns obtained from highly purified substrates are very reproducible and the digestion allows easy and clear comparisons.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1435-1803
    Keywords: cardiac hypertrophy ; labetalol ; catecholamines ; spontaneously hypertensive turkeys ; ventricularmyosin pattern
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In most animal species, left ventricular hypertrophy due to pressure overload is associated with an advantageous increase of the “slow” V3 isomyosin. In contrast, in spontaneously hypertensive turkeys, the development of left ventricular hypertrophy is associated with the synthesis of a “fast” V1-like isomyosin, with high incidence of cardiac failure. This could be related to the high catecholamine levels found in these animals. This is why we studied the ventricular myosin pattern after lowering of blood pressure and regression of cardiac hypertrophy obtained by means of labetalol, an α- and β-blocking drug which inhibits the effects of catecholamines. From the 2nd to the 32nd week of age, 22 turkeys were treated with increasing doses of p.o. labetalol (from 20 to 35 mg/kg body weight daily) and 16 other turkeys were given daily p.o. placebo. Blood pressure and heart rate were periodically measured by an indirect method. After sacrifice, the degree of cardiac hypertrophy was evaluated by the biventricular weight to body weight ratio, ventricular myosin was purified, Ca++-activated ATPase activity assessed, and ventricular myosin pattern was determined by two-dimensional gel electrophoresis of myosin heavy chains. Plasma and cardiac catecholamines were measured by high performance liquid chromatography. Throughout the study period, blood pressure and heart rate were significantly reduced in the labetalol-treated animals as compared to the untreated ones. At the end of the study period, the ventricular mass was significantly lower in the labetalol group. Nevertheless, no differences were obscrved in ventricular myosin pattern and Ca++-activated ATPase activity levels between the two groups. In the labetalol group, an increase in plasma catecholamines and only a slight, but not significant, increase in cardiac catecholamines was found. These data indicate that in spontancously hypertensive turkeys, the synthesis of the “fast” V1-like isomyosin is not influenced by known pathophysiological stimuli like blood pressure, cardiac hypertrophy and catecholamines.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Herzschrittmachertherapie & Elektrophysiologie 9 (1998), S. 147-154 
    ISSN: 1435-1544
    Keywords: Schlüsselwörter Arrhythmogene rechtsventrikuläre Kardiomyopathie ; Molekularbiologie ; Pathologie ; Plötzlicher Herztod ; ventrikuläre Arrhythmien ; Key words Arrhythmogenic right ventricular cardiomyopathy ; molecular biology ; pathology ; sudden death ; ventricular arrhythmias
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a primary heart muscle disease characterized by progressive myocardial atrophy of the right ventricle, with massive fibro-fatty replacement accounting for ventricular electrical instability at risk of severe arrhythmias or even cardiac arrest. The disease was found to be the major cause of sudden death in the young and athlete in the Veneto region, Italy. A familial occurrence with autosomal dominant inheritance was then discovered and the prevalence estimated to be higher than 1 in 5000. Linkage analysis allowed to identify four loci, two mapping to chromosome 14, one to chromosome 1 and one to chromosome 2, suggesting genetic and clinical heterogeneity. The specific gene defects as well as the defective coded proteins have not yet been identified. ARVC was recently included among the cardiomyopathies in the revised WHO classification. Both the etiology and pathogenesis of the disease are still unknown. In particular, the mechanisms leading to progressive loss of myocardium and fibro-fatty replacement are speculative. According to the frequent finding of inflammatory infiltrates at histology, an inflammatory theory has been advanced and infective, toxic or immune mechanisms have been postulated. Recently, myocyte programmed cell death (apoptosis) has been demonstrated both in autoptic and bioptic material, suggesting that recurrent bouts of apoptosis may destroy the myocardium, which is then replaced by fibro-fatty tissue. This evidence may open new avenues not only to understand the disease but also to conceive new diagnostic and therapeutic strategies.
    Notes: Zusammenfassung Die arrhythmogene rechtsventrikuläre Kardiomyopathie stellt eine primäre Herzmuskelerkrankung mit progredienter Atrophie rechtsventrikulären Myokards und massiver fibrolipomatöser Infiltration, die für eine elektrische Instabilität mit dem Risiko schwerwiegender ventrikulärer Arrhythmien bis hin zum plötzlichen Herztod verantwortlich ist, dar. In Venetien, Italien, ist diese Erkrankung die wichtigste Ursache des plötzlichen Herztodes bei jungen Menschen und Sportlern. Eine familiäre Disposition mit autosomal-dominantem Erbgang wurde beschrieben, die Prävalenz der Erkrankung wird auf 1:5000 geschätzt. Mit Hilfe von Kopplungsanalysen konnten zwei Gendefekte auf Chromosom 14 und jeweils ein Defekt auf Chromosom 1 und 2 identifiziert werden. Somit ist von genetischer und klinischer Heterogenität des Krankheitsbildes bei bislang noch unbekannten Kandidatengenen auszugehen. Erst kürzlich wurde die arrhythmogene rechtsventrikuläre Kardiomyopathie in die Gruppe der Kardiomyopathien nach der WHO-Klassifikation aufgenommen. Sowohl die Ätiologie als auch die Pathogenese der Erkrankung bleiben unklar. Anhand häufig nachweisbarer entzündlicher Infiltrate wurden infektiöse, toxische oder immunologische Mechanismen postuliert. Darüber hinaus konnte der programmierte myokardiale Zelltod (=Apoptose) in autoptischem und bioptischem Material nachgewiesen werden, so daß es naheliegend erscheint, daß Schübe von Apoptose zur Zerstörung des Myokards, das nachfolgend durch Fett und Bindegewebe ersetzt wird, führen. Diese Erkenntnisse mögen zum Verständnis und zur Entwicklung therapeutischer Ansätze beitragen.
    Type of Medium: Electronic Resource
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