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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 35 (1957), S. 637-638 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Die vonMatthies an Kaninchenerythrocyten entdeckte Ausnutzung von Formaldehyd zur fermentativen Reduktion von Methämoglobin (HbIII) in roten Zellen wird an Erythrocyten menschlicher Neugeborener und Erwachsener bestätigt. Bei einer Formaldehydkonzentration von 5·10−3 mol geht die HbIII-Reduktion rascher vor sich als mit Glucose. Neugeborenen-Erythrocyten verhalten sich qualitativ wie die Erythrocyten von Erwachsenen. Quantitativ besteht eine Minderleistung, wie schon aus Untersuchungen mit Glucose und Lactat geläufig ist. In hypochromen Erythrocyten ist die HbIII-Rückbildung durch Formaldehyd wie die durch Glucose oder Lactat stark gesteigert. Die Steigerung geht weit über das hinaus, was aus der verringerten Hb-Beladung der Zellen erwartet werden könnte. Es wird auf die merkwürdige Tatsache aufmerksam gemacht, daß die überschießende Fermentaktivität in hypochromen Erythrocyten nur bei Prozessen gefunden wird, die mit einer Wasserstoffübertragung unter Vermittlung von Codehydrogenase I (DPN) verknüpft sind. Über Codehydrogenase II (TPN) ablaufende Prozesse zeigen diese Steigerung nicht.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric cardiology 6 (1985), S. 161-164 
    ISSN: 1432-1971
    Keywords: Cor triatriatum ; Primary pulmonary hypertension ; Echocardiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a 17-month-old boy with clinical signs of right heart failure, the diagnosis of primary pulmonary hypertension was made, based on cardiac catheterization findings with high pulmonary arterial pressure and normal pulmonary wedge pressure although two-dimensional echocardiography demonstrated a left atrial membrane. Postmortem examination confirmed a left atrial membrane (cor triatriatum), and the microscopic examination revealed the histological pattern of primary pulmonary hypertension. Due to reduced pulmonary blood flow, pulmonary venous obstruction was masked and could not be assessed by measuring pulmonary wedge pressure.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 34 (1956), S. 1292-1292 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 42 (1964), S. 853-856 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Previous methods of methemoglobin estimation produce information about methemoglobin content of total erythrocyte population. A new method for distinguishing methemoglobin from oxyhemoglobin in single red blood cells is presented; it allows to study the intracellular formation and reduction of methemoglobin under several conditions. The method is based on the inhibition of the peroxidative activity of methemoglobin by its conversion into cyanmethemoglobin. In a solution containing citric acid, ethanol and hydrogen peroxide cyanmethemoglobin is eluted from red cells of air dried blood smears while oxyhemoglobin remains within the cell. Mechanism and conditions for distinguishing the two hemoglobins are described. The investigation permits the conclusion that catalase and peroxidase have a different protective function on the peroxide denaturation of air dried hemoglobin.
    Notes: Zusammenfassung Es werden Methode, Bedingungen und Mechanismus der Differenzierung von Methämoglobin und Oxyhämoglobin in einzelnen Erythrocyten auf dem Objektträger beschrieben. Das Prinzip der Methode beruht auf der Hemmung der peroxydatischen Aktivität von Methämoglobin nach Umwandlung des Blutfarbstoffs in Cyanhämiglobin. Methämoglobin wird in dieser Form durch eine bestimmt zusammengesetzte Lösung aus den Zellen herausgelöst, während Oxyhämoglobin in den Erythrocyten bleibt und durch Anfärben sichtbar gemacht werden kann. Aus den Untersuchungen läßt sich folgern, daß Katalase und Hämoglobin als Peroxydase hinsichtlich der Schutzwirkung gegenüber der Peroxyddenaturierung von luftgetrocknetem Blutfarbstoff qualitativ unterschiedlich wirksam sind.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 45 (1967), S. 1193-1200 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Hematological data and results of hemoglobin analysis are presented from the first observation of an α-thalassemia in a German family. The propositus is an 8 year old, mentally retarded girl, with hypochromic microcytic anemia, target cells and several erythrocytes with HbH inclusion bodies. Hemoglobin electrophoresis revealed 5,6% Hb Bart's, trace amounts of HbH, and 3,3% HbF unequally distributed among the red blood cells. Hb Bart's was identified by starch gel electrophoresis at pH 7,0, by alkalidenaturation, ultraviolet-spectrum and heat denaturation. The mother of the propositus had an α-thalassemia trait as demonstrated by a microcytic hypochromic anemia and a few red cells containing HbH inclusion bodies, while the father and his three children from another mating showed no evidence for α-thalassemia trait. The mother's mother is most likely an α-thalassemia gen carrier. Quantitative calculations give evidence that not only is α-chain synthesis suppressed in the propositus, but alsoβ-chain synthesis, assuming that HbH disease with persistence of high amounts of Hb Bart's is a special form in the heterogenous α-thalassemia syndrome.
    Notes: Zusammenfassung Es wird über die erste deutsche Familie mit α-Thalassämie berichtet, wobei ein fast 8jähriges Mädel in der 3. Generation an einer HbH-Krankheit mit Persistenz von Hb Bart's erkrankt ist. In Übereinstimmung mit anderen Untersuchungen läßt sich aus der Familienkonstellation albeiten, daß die HbH-Krankheit durch Kombination von einem „aktiven“ mit einem zweiten, aber „stummen“ α-Thalassämie-Gen entsteht. Aus den quantitativen Verhältnissen der Polypeptidketten zueinander wird die Möglichkeit diskutiert, ob nicht die α-Thalässämie mit Persistenz von Hb Bart's eine Sonderform der HbH-Krankheit darstellt, bei der gleichzeitig auch die Synthese derβ-Ketten gehemmt ist.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 50 (1972), S. 907-909 
    ISSN: 1432-1440
    Keywords: Hb Wien ; Properties ; Hb Wien-Eigenschaften
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Hb Wien besitzt als elektrophoretisch schnell wanderndes instabiles Hämoglobin im Vergleich zu manchen anderen instabilen Varianten einige abweichende Eigenschaften. Diese bestehen in kaum erhöhter Spontanoxydation und einem praktisch normalen Methämoglobinspektrum. Die in der Cyanmethämoglobinform nicht vom HbA1 abweichende Hitzeempfindlichkeit ist wahrscheinlich auf den stabilisierenden Effekt der Ligandenbildung mit Cyanid zurückzuführen. Das fetale Hämoglobin entspricht quantitativ und in der intracellulären Verteilung anderen bei instabilen Varianten mitgeteilten Befunden. Das HbA2 ist normal.
    Notes: Summary Report on some properties of “Hb Wien”, a fast moving, unstable hemoglobin first described in 1966 by Kleihauer, Betke and Pietschmann. The methemoglobin spectrum is only slightly different from HbA1; methemoglobin formation resembles that of normal hemoglobin. On heat denaturation (phosphate buffered cyanmethemoglobin) Hb Wien is as stable as HbA1 indicating the stabilizing effect of ligand binding with cyanide. HbA2 was within normal limits.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 44 (1957), S. 308-309 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 188-189 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] 0-05 ml. of a 1'25 per cent solution of sodium nitrite is pipetted into a small test-tube. The tube is flushed with pure nitrogen and stoppered with a rubber cap. Five drops (about O'l ml.) of a citrated sample of the blood in question are added by a syringe which is inserted into the cap with a ...
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 1196-1197 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The results were relatively poor. Much better results were obtained, however, with the following elution procedure : (1) To heparinized or citrated blood 1/50 vol. of a 0.4 M solution of potassium cyanide is added. Thin blood smears are prepared. (2) The air-dried smears are immersed into the ...
    Type of Medium: Electronic Resource
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