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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Organometallics 14 (1995), S. 1850-1854 
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 68 (1946), S. 757-759 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0428
    Keywords: Keywords Rat ; energy metabolism ; NAD-redox state ; oxidative stress ; sorbitol dehydrogenase inhibitor ; streptozotocin-diabetes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Aims/hypothesis. Studies of the role of sorbitol dehydrogenase in nerve functional deficits induced by diabetes reported contradictory results. We evaluated whether sorbitol dehydrogenase inhibition reduces metabolic abnormalities and enhances oxidative stress characteristic of experimental diabetic neuropathy. Methods. Control and streptozotocin-diabetic rats were treated with or without sorbitol dehydrogenase inhibitor (SDI)-157 (100 mg · kg–1· day–1, in the drinking water, for 3 weeks). Sciatic nerve free mitochondrial (cristae and matrix) and cytosolic NAD+: NADH ratios were calculated from the β-hydroxybutyrate, glutamate and lactate dehydrogenase systems. Concentrations of metabolites, e. g. sorbitol pathway intermediates and variables of energy state were measured in individual nerves spectrofluorometrically by enzymatic procedures. Results. The flux through sorbitol dehydrogenase (manifested by nerve fructose concentrations) was inhibited by 53 % and 74 % in control and diabetic rats treated with SDI compared with untreated control and diabetic groups. Free NAD+:NADH ratios in mitochondrial cristae, matrix and cytosol were decreased in diabetic rats compared with controls and reduction in either of the three variables was not prevented by sorbitol dehydrogenase inhibitor. Phosphocreatine concentrations and phosphocreatine:creatine ratios were decreased in diabetic rats compared with controls and were further reduced by the inhibitor. Malondialdehyde plus 4-hydroxyalkenals concentration was increased and reduced gluthathione concentration was reduced in diabetic rats compared with the control group, and changes in both variables were further exacerbated by sorbitol dehydrogenase inhibitor. Neither NAD-redox and energy states nor lipid aldehyde and reduced gluthathione concentrations were affected by treatment with the inhibitor in control rats. Conclusion/interpretation. Inhibition of sorbitol dehydrogenase does not offer an effective approach for prevention of oxidation and metabolic imbalances in the peripheral nerve that is induced by diabetes and is adverse rather than beneficial. [Diabetologia (1999) 42: 1187–1194]
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 12 (1965), S. 175-178 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 47 (1969), S. 106-107 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The pineapple protease bromelin (E.C. 3.4.4.24) is inactivated by human serum and it is also eliminated from the blood after i.v. injection. After an oral dose of 50 mg/kg to volunteers no proteolytic activity and neither direct nor indirect activation of the fibrinolytic system can be detected in the blood. After intraduodenal application of 300 mg/kg to cats the proteolytic activity in the blood is less than 0.02% of the administered dose.
    Notes: Zusammenfassung Die Ananas-Protease Bromelin (E.C. 3.4.4.24) wird sowohl durch Humanserum inaktiviert als auch nach i.v. Injektion aus dem Blut eliminiert. Nach oraler Gabe von 50 mg/kg an Probanden kann keine proteolytische Aktivität im Blut und keine direkte oder indirekte Aktivierung des fibrinolytischen Systems nachgewiesen werden. Nach intraduodenaler Gabe von 300 mg/kg an Katzen ist die proteolytische Aktivität im Blut kleiner als 0,02% der Dosis.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 52 (1974), S. 384-393 
    ISSN: 1432-1440
    Keywords: Cell cycle ; ineffective cell renewal ; pulse-cytophotometry ; Feulgen-photometry ; 3H-Thymidine autoradiography ; chromosome analysis ; leukaemia ; panmyelopathy ; Zellcyclus ; ineffektive Zellneubildung ; Impulscytophotometrie ; Feulgen-Photometrie ; 3H-Thymidin-Autoradiographie ; Chromosomenanalyse ; Leukämie ; Panmyelopathie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der vorliegenden Arbeit werden die an 395 Proben von Blut und Knochenmark von 119 Patienten gewonnenen durchflußphotometrischen Nucleinsäurebestimmungen vorgelegt. Der Vergleich mit feulgenphotometrischen DNS-Untersuchungen zeigte nur in 3 von 35 Fällen einen allein methodisch erklärbaren Unterschied in den Ergebnissen. Bei 8 der Kranken mit Hämoblastose, bei denen erhöhte DNS-Werte Folge einer Hyperdiploidie sein könnten, wurde zweimal zusätzlich eine Stammlinie bei tetraploiden Werten gefunden, aber in keinem Fall Aneuploidien, die zwischen 2c und 4c liegende DNS-Werte erklären könnten. Die gewonnenen Ergebnisse quantitativer DNS-Untersuchungen können deshalb auch bei den Kranken mit Hämoblastosen nach dem Konzept G0, G1-S-(G2) gedeutet werden. Danach lassen sich Störungen des Zellcyclus sowohl im Übergang von G1 nach S, innerhalb der S-Phase wie in der G2-Phase erfassen. Wie bisher bereits angenommen, erfolgt eine Regulation vorwiegend durch eine Blockade des G1-S-Überganges. Die in 55 Fällen gleichzeitig durchgeführten3H-Thymidinautoradiographischen Untersuchungen gestatten bei dem statistischen Vergleich mit den durchflußphotometrisch gewonnenen Nucleinsäurebestimmungen die Annahme, daß eine ineffektive Zellneubildung durch ein Ausscheren von S-Phase-Zellen aus dem Cyclus erfolgt, und sowohl bei akuten Leukämien wie bei Panmyelopathien, wie in der untersuchten Gruppe der Anämien bei Urämie eine große Bedeutung hat. Eine ineffektive Blutzellneubildung durch Austritt aus dem Cyclus nach Beginn der DNS-Reduplikation scheint damit häufiger zu sein als bisher angenommen. Die Methode der durchflußphotometrischen Nucleinsäurebestimmung ist nicht geeignet, um bei niedrigem Anteil an S- und G2-Phase-Zellen Verschiebungen innerhalb der S-Phase auch unter Behandlung mit Cytostatika mit ausreichender Genauigkeit zu erkennen, da die Befunde durch die breite Streuung der DNS-Werte der G0/G1-Zellen überdeckt werden können.
    Notes: Summary The authors discuss the results of the pulse-cytophotometric nucleic acid analysis obtained in 395 tests of blood and bone marrow from 119 patients. Compared with Feulgen-photometric DNA investigations, a difference was found in only 3 of 35 cases. This difference may be attributed to the various methods applied. In the study of the chromosomes, an additional stem-line with tetraploid values was seen twice in eight cases of haemoblastosis. In these cases the increased DNA values might be a consequence of hyperdiploid cells. In no case however were any aneuploid cells observed which could be responsible for DNA values between 2c and 4c. Therefore, the results of quantitative DNA analysis can be adscribed also to patients with haemoblastosis according to the concept G0, G1-S-(G2). Disturbances of the cell cycle can by these means be registered in the transitional period from G1 to S, as well as within the S-phase and the G2-phase. We found that a regulation mainly occurs by blocking the transitional period from G1 to S. 553H-thymidin-autoradiographic investigations were made concomitantly on the same material and the results statistically compared with nucleic acid analysis carried out by means of cytophotometry. According to our results we assume that an ineffective cell- renewal results from S-phase cells out of the cycle. This fact has been observed with acute leukaemia as well as with panmyelophthisis and with the tested groups of anaemia caused by uraemia. We suppose that an ineffective renewal of blood cells by out-of-cycle cells after the beginning of the DNA reduplication is probably more frequent than assumed until now. It has to be said however that the pulse-cytophotometric nucleic acid analysis is not a method suitable for the very exact diagnosis of the shifting within the S-phase in cases with a low part of S- and G2-phase cells, because the diagnosis could be veiled by a large dispersion of the DNA-values of G0/G1 cells.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1440
    Keywords: Creatine kinase, isoenzymes ; Creatin kinase, isoenzyme-MB ; Antibodies, inhibiting ; Kinetic enzyme activity determination ; Myocardial infarction ; Creatinkinase-Isoenzyme ; Creatinkinase-Isoenzym MB ; Antikörper, inhibierende ; Enzymaktivitäts-Bestimmung, kinetische ; Myokardinfarkt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über eine neue Methode zur quantitativen Bestimmung der Creatinkinase MB-Aktivität im Serum berichtet. Die Methode beruht auf einer direkten Messung der Aktivität der Creatin-kinase-Untereinheit B nach Hemmung der Aktivität der Creatinkinase-Untereinheit M durch inhibierende Antikörper und benötigt zur Durchführung 15 min. Bei allen 83 untersuchten Patienten mit klinisch gesichertem Myokardinfarkt konnten zwischen der 6. und 28. Stunde nach Infarkteintritt Creatinkinase MB-Aktivität gemessen werden. Der Creatinkinase MB-Anteil zum Zeitpunkt der höchsten Creatinkinase-Gesamtaktivität betrug 6–17%, im Mittel 8%. Diese Methode ermöglicht daher in der Notfalldiagnostik eine Differentialdiagnose unklarer Creatinkinase-Gesamtaktivitäts-Erhöhungen.
    Notes: Summary A new method for the determination of creatine kinase-MB activity in the serum is presented. The principle of this method is the direct measurement of the activity of creatine kinase M subunits by inhibiting antibodies. The total test procedure takes 15 min. In the sera of all the 83 patients tested, who have clinically proven myocard infarction, creatine kinase-MB activity can be measured between the 6th and 28th hour after infarction. At the time of maximum total creatine kinase activity the percentage of creatine kinase-MB activity is between 6 and 17%, the mean value being 8%. In cases of emergency this method can be used for the differential diagnosis of elevated total creatine kinase activities of unknown origin.
    Type of Medium: Electronic Resource
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