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  • Artikel: DFG Deutsche Nationallizenzen  (20)
  • 1995-1999  (10)
  • 1985-1989  (5)
  • 1980-1984  (3)
  • 1965-1969  (2)
  • 11
    ISSN: 1432-0886
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The chromosomes of the diploid Hyla chrysoscelis and its tetraploid sibling species H. versicolor were studied with AgNO3 staining and in situ hybridization to determine the chromosome location of the 18S and 28S ribosomal RNA (rRNA) genes. A total of 236 Hyla chrysoscelis from 34 localities in 15 U.S. states and 100 H. versicolor from 15 localities in 12 states were examined. The rRNA gene sites were extremely variable in H. chrysoscelis, and also variable, but to a lesser extent, in H. versicolor. The most common rRNA gene site in both H. chrysoscelis and H. versicolor was on the short arm of chromosome 6. All of the rRNA gene locations seen in H. versicolor were also seen in H. chrysoscelis, supporting the hypothesis that the tetraploid H. versicolor arose from H. chrysoscelis. Although polymorphic rRNA gene sites in H. versicolor may reflect the positions of the rRNA genes in H. chrysoscelis ancestors, the origin of the extreme variability of such sites in H. chrysoscelis seems more obscure. Possible explanations include inversions, translocations, mobile genetic elements or a combination of some or all of these.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 12
    Digitale Medien
    Digitale Medien
    Springer
    European journal of clinical pharmacology 28 (1985), S. 135-138 
    ISSN: 1432-1041
    Schlagwort(e): hypertension ; cadralazine ; vasodilators ; chlorthalidone ; atenolol ; side-effects
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Summary The antihypertensive efficacy of a new long-lasting vasodilator, cadralazine, and the diuretic chlorthalidone have been compared in hypertensive patients receiving concurrent treatment with atenolol. After a 4-week run-in period with atenolol alone 100 mg/day, two groups of 10 patients whose diastolic blood pressure exceeded 100 mm Hg were given for a period of 65 days either cadralazine 15 mg/day or chlorthalidone 25 mg/day, according to a randomized, double-blind, between-patients design. Compared to atenolol alone, both cadralazine and chlorthalidone induced a statistically and clinically significant decrease in blood pressure. The antihypertensive effect did not differ significantly between groups. Good compensation of the atenolol-induced decrease in heart rate was obtained with cadralazine, whereas during atenolol + chlorthalidone treatment at times the standing heart rate was significantly lower than during treatment with atenolol + cadralazine. Side-effects, many of which were already present during atenolol treatment, occurred with a similar frequency in both groups. It is concluded that atenolol + cadralazine and atenolol + chlorthalidone are equally well tolerated, acceptable and effective in the treatment of hypertension, but that further studies are warranted to explore the potential haemodynamic advantages of the cadralazine + atenolol combination.
    Materialart: Digitale Medien
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  • 13
    ISSN: 1432-1203
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Genomic DNA from 49 Italian patients affected with severe haemophilia A was analysed by Southern blotting technique using a cDNA probe corresponding to exons 14–26 of coagulation factor VIII. No TaqI site mutation was observed in this sample. A partial deletion, eliminating exons 15–18 and spanning about 13 kb, was identified and characterized in one patient with anti-factor VIII antibodies.
    Materialart: Digitale Medien
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  • 14
    ISSN: 1439-0973
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Bei asymptomatischen, anti-HCV positiven Personen mit andauernd normalen oder leicht (das heißt ≤1,5 fach über der oberen Normgrenze) liegenden Serum ALT-Spiegeln wurden die HCV-RNA im Serum, Leberhistologie und das RIBA-II-Muster untersucht. Bei 22 asymptomatischen, anti-HCV positiven Personen (11 Männern und 11 Frauen im mittleren Alter von 40; Bereich 21–70 Jahren) wurde eine Leberbiopsie durchgeführt und HCV-RNA im Serum bestimmt. Der Nachweis von anti-HCV wurde mit ELISA-2 und RIBA-II-Tests geführt. Die HCV-RNA im Serum wurde mittels PCR bestimmt. Unsere Untersuchungen zeigten, 1.) daß 9/22 asymptomatischen, anti-HCV-positiven Personen histologische Zeichen einer chronischen Lebererkrankung mit fortbestehender HCV-Infektion hatten. 2.) Vier Personen hatten keine histologischen Zeichen einer chronischen Hepatitis und normale Serum-ALT-Spiegel trotz Nachweises von HCV-RNA im Serum. 3.) Die ALT-Spiegel im Serum unterschieden HCV-RNA positive Personen mit chronischer Hepatitis nicht von denjenigen ohne chronische Hepatitis. 4.) Bei anti-HCV positiven Personen mit normalen ALT-Spiegeln ist ein positiver RIBA-II Test nicht immer mit einer HCV-Virämie oder einer chronischen Hepatitis assoziiert. Bei unklarem RIBA-II-Muster bestanden häufig unspezifische Leberveränderungen oder ein normaler histologischer Befund. „Wirklich“ gesunde Träger von HCV (das heißt, Personen mit normalem Serum ALT-Spiegel, ohne histologische Zeichen einer chronischen Hepatitis trotz HCV Virämie) können folglich vorkommen.
    Notizen: Summary This study was designed to evaluate serum HCV-RNA, liver histology, and RIBA-II pattern in asymptomatic anti-HCV positive subjects with persistently normal or slightly (i.e. ≤1.5 times the upper limit of the normal range) elevated serum ALT levels. To this purpose, 22 asymptomatic anti-HCV positive subjects (11 men and 11 women, median age 40, range 21–70 years) underwent liver biopsy and determination of serum HCV-RNA. Positivity for anti-HCV was determined by ELISA-2 and by RIBA-II. Serum HCV-RNA was determined by PCR. Our data show that: 1) 9/22 symptom-free, anti-HCV positive subjects had histological features of chronic liver disease associated with ongoing HCV infection; 2) four subjects had no histological signs of chronic hepatitis and normal serum ALT levels despite positivity for serum HCV-RNA; 3) serum ALT levels did not discriminate HCV-RNA positive subjects with from those without chronic hepatitis; 4) in anti-HCV positive subjects with normal serum ALT levels, a positive RIBA-II pattern was not always predictive of HCV viraemia or chronic hepatitis while an indeterminate RIBA-II pattern was frequently associated with nonspecific liver changes or normal histology. In conclusion, based on these findings, “true” healthy carriers of HCV (i.e. subjects with normal serum ALT levels and no histological features of chronic hepatitis despite HCV viraemia) may exist.
    Materialart: Digitale Medien
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  • 15
    ISSN: 1573-675X
    Schlagwort(e): Apoptosis ; CD95 (Fas/APO-1) ; NF-κB/Rel ; T lymphocytes.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The activity of NF-κB/Rel transcription factors can inhibit the apoptosis induced by TNF, UV or cancer therapy drugs in a number of cell types, including human T lymphocytes. Furthermore, the NF-κB/Rel inducer, phorbol-12-myristate-13-acetate (PMA), has been reported to suppress the CD95-induced apoptosis of human T lymphocytes. To verify whether the survival-enhancing effect of PMA required NF-κB/Rel activity, we generated two Jurkat cell sublines (AL.7 and AL.8) transfected with a pCMV4-IκBα construct, and two (AL.3 and AL.5) with the void pCMV4 vector. Compared to wild type, AL.3 and AL.5 cells, the AL.7 and AL.8 sublines displayed markedly lower amounts of NF-κB/Rel nuclear complexes and a reduced expression of a κB-controlled CAT reporter gene after 1 and 4 h of incubation with PMA, respectively. All the five cell types displayed negligible levels of apoptosis when cultured with medium or PMA alone; when stimulated with the mAb CH-11, the AL.7 and AL.8 sublines displayed apoptotic responses only slightly (〈0.5 fold) higher than control cells. On the other hand, the salvage activity of PMA was partially impaired in the AL.7 and AL.8 sublines. PMA inhibited apoptosis by 〉85% in wild type, AL.3 and AL.5 cells and by 〈60% in the AL.7 and AL.8 sublines; the apoptosis percentages in the mAb CH-11 + PMA cultures of the IκBα-transfected cells were 〉4-fold higher than in control cells. We conclude that the inhibition of the CD95-induced apoptosis by PMA relies on both NF-κB/Rel-dependent and -independent mechanisms. The partial contribution of these nuclear factors to the suppression of apoptosis indicates that the NF-κB/Rel activity can influence the extent of the CD95-induced T cell death.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 16
    ISSN: 1573-2568
    Schlagwort(e): roxatidine ; ranitidine ; MKN 28 ; cell proliferation ; cell migration
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Gastric mucosal cell migration and proliferation are crucial events in the repair of gastric mucosal erosions. This study was designed to test the hypothesis that the H2 blockers roxatidine and ranitidine might stimulate migration and proliferation of gastric mucous cells derived from a human well-differentiated gastric adenocarcinoma cell line (MKN 28 cells)in vitro, in conditions independent of systemic factors and of acid inhibition. Confluent monolayers of MKN 28 cells were wounded with a razor blade and were then incubated with roxatidine or ranitidine. The number of cells migrating to the damaged area was determined 24 hr later. Cell proliferation was assessed by means of [3H]thymidine uptake and cell counts after incubation with roxatidine or ranitidine. Neither H2 antagonist significantly stimulated cell migration. On the other hand, cell proliferation was dose-dependently and significantly enhanced by incubation with roxatidine and ranitidine. Exogenous administration of TGF-α significantly stimulated MKN 28 cell division. However, incubation with roxatidine or ranitidine did not increase the steady-state mRNA expression of TGF-α or EGFR as assessed by northern blot analysis. Based on thesein vitro findings, we postulate that the ulcer healing effect of these H2 antagonistsin vivo might be due in part to stimulation of gastric mucosal cell proliferation.
    Materialart: Digitale Medien
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  • 17
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 326 (1987), S. 335-336 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The production cross sections of7Li in its ground and first excited states have been measured at 14°, 120°, 150°, for the 742 MeV20Ne+60Ni reaction. Hauser-Feshbach calculations show that the backward angle data are consistent with an emission temperature greater than 6 MeV. This is in agreement with the values extracted from the slope of the energy spectra and indicates that the emitting source is equilibrated.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 18
    ISSN: 1434-601X
    Schlagwort(e): PACS: 25.70.-z Low and intermediate energy heavy-ion reactions – 24.30.Cz Giant resonances – 23.20.-g Electromagnetic transitions – 25.70.Lm Strongly damped collisions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: We report on the results obtained from the study of the 32S +74Ge deep inelastic reaction at incident energy E= 320 MeV. High-energy γ-rays were detected in an array of 6 seven-pack BaF2 clusters. Coincidence with complex fragments detected in 12 three-stage telescopes ensured the selection of peripheral reaction events. In order to investigate the pre-equilibrium dipole strength excitation two independent analyses were performed. In the first analysis the energy spectra of the γ-rays were evaluated in the statistical model framework while in the second one the γ-ray fragment angular correlation with respect to the nuclear spin vector of the composite system was studied. Both methods indicate the excitation of dipole strength in the highly deformed dinucleus and provide dipole resonance parameter sets that are in good agreement with each other.
    Materialart: Digitale Medien
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  • 19
    ISSN: 1573-0743
    Schlagwort(e): dobutamine stress echocardiography ; myocardial scintigraphy ; SPET ; Sestamibi ; pharmacological stress testing ; coronary artery disease
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background: Simultaneous dobutamine stress echocardiography (DSE) and99mTc-MIBI-SPET (DMS) for the evaluation of the presence and the extent of coronary artery disease (CAD) were assessed for a head to head comparison regarding the diagnostic accuracy of the two tests. Methods and Results: Forty-five consecutive patients (33 males and 12 females: 53±6.8 yr.) underwent exercise electrocardiography and simultaneous dobutamine stress echocardiography and MIBI-SPET imaging. Coronary angiography was performed in all patients (significant coronary stenosis 〉 50%). On the basis of the results of exercise electrocardiogram the pre-test probability for coronary artery disease (Diamond's algorithm) was low (45.6±12.7 %). The overall specificity, sensitivity and predictive accuracy of Echo-dobutamine stress test for diagnosis of the presence or absence of CAD were: specificity 82%, sensitivity 76%, diagnostic accuracy 80%, positive predictive value 90%, negative predictive value 40%. The overall specificity, sensitivity and predictive accuracy of MIBI-SPET-dobutamine test for diagnosis of the presence or absence of CAD were: specificity 86%, sensitivity 87%, diagnostic accuracy 84%, positive predictive value 97%, negative predictive value 54%. MIBI-SPET-dobutamine test showed a significantly higher sensitivity in comparison with ECHO-dobutamine test (P〈0.05). Conclusion: Both noninvasive methods for the detection of CAD showed a good diagnostic accuracy. Nevertheless the SPET model showed an higher sensitivity in comparison with DSE model, essentially in the presence of a lower extent of CAD and during submaximal test.
    Materialart: Digitale Medien
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  • 20
    Digitale Medien
    Digitale Medien
    Springer
    Journal of comparative physiology 169 (1999), S. 303-310 
    ISSN: 1432-136X
    Schlagwort(e): Key words Corticosterone ; Testosterone ; Food-stress ; Nest-bound chicks
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract In this study we examined hormonal responses of Black-legged Kittiwake (Rissatridactyla) chicks to experimental variations in energy content and nutritional quality (low or high lipid to protein ratio, LPR) of their food. Starting at the age of 10 days, chicks were fed either high or low LPR fish at 30, 50, 70 and 100% of ad libitum energy intake. After 20 days of treatment, chicks were exposed to a standardized acute handling and restraint stress protocol, where a baseline sample was taken immediately after taking a chick from the nest, and three additional blood samples were taken at intervals up to 50 min. Testosterone and corticosterone titres in plasma were measured via radioimmunoassay. We found that baseline testosterone levels were not significantly affected by the experimental treatments. Food-restricted chicks had elevated baseline and acute stress-induced levels of corticosterone compared to chicks fed ad libitum. An elevation of circulating levels of corticosterone in energetically stressed individuals was further magnified by low nutritional quality of food. Baseline and acute stress-induced corticosterone levels of chicks were negatively correlated with their fat reserves. We conclude that the physiological condition of Black-legged Kittiwake chicks can be assessed reliably by measuring circulating levels of corticosterone. We discuss short- and long-term effects of elevated corticosterone secretion in food-stressed nest-bound chicks.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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