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  • 1
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary. While studying the lung function of pregnant women at term in four different postures, we were surprised to note marked cyclic accelerations in the heart rate in two-thirds of the women when in a standing position. The mean cycle length was 105 s (range: 1–4 min) and the amplitude had a mean of 27 beats/min (range: 9–51). Blood flow velocity measurements with ultrasound Doppler over the femoral vein showed that there was an intermittent reduction of flow during quiet standing. When the venous return ceased, maternal heart rate increased, cardiac output decreased and blood pressure fell. After the venous blood flow was restored, maternal heart rate, cardiac output and blood pressure returned to normal until the cycle started again. Concomitant with these maternal heart rate changes, different patterns of fetal heart rate were observed. About 70% of the fetuses showed reduction in the long-term variability, increase in fetal heart rate or periodic accelerations. Although no woman fainted during quiet standing, the maternal circulatory changes were consistent with those seen in the classical vena cava syndrome.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 19 (1983), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 17 (1983), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 231 (1981), S. 675-677 
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Mittels eines Fragebogens wurden 660 Diabetiker interviewt über Krankheits-Vorgeschichte und Krankheits-Verlauf. Internistische und ophthalmologische Befunde wurden erfaßt, die anläßlich eines Klinikaufenthaltes zur Stoffwechselkontrolle erhoben worden waren. Eine HNO-ärztliche Untersuchung einschließlich Gleichgewichts- und Hörtest wurde durchgeführt. Die Auswertung zeigte, daß der mittlere Hörverlust (median) für die einzelnen Typen des Diabetes nicht deutlich über die Altersnorm Gesunder (Spoor) hinausgeht (Abb. 1). Die Hypothese, das Ohr des Zuckerkranken altere vor, konnte statistisch nicht belegt werden. Der Versuch, durch Faktorenanalyse einzelner oder gruppierter Faktoren die besser Hörenden von den schlechter Hörenden zu trennen, ist bisher
    Notes: Summary It should be examined by this study, if there exists a form of hearing loss, which is typical for diabetes mellitus. 660 patients were interviewed by means of a questionaire with regard to case history and course of disease. Internal and ophthalmological findings have been registered, which were compiled during a clinical treatment for metabolic stabilisation. An ENT-examination was performed including vestibular and auditory tests. The evaluation of data showed that there was no median hearing loss, which could be attributed to the diabetic metabolic disorder. The hypothesis, that diabetes leads to a premature old age of hearing, could not be confirmed on a statistical base. The statistical analysis of separate factors of the diabetic disease, of vascular risks and of noise or ear infections leads till now to no results.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 34 (1983), S. 236-240 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Wir zeigen, daß die Existenz von Wellenzügen mit hohen Ausbreitungsgeschwindigkeiten bei verallgemeinerten Reaktions-Diffusions-Gleichungen leicht nachgewiesen werden kann, indem ein Satz von D. V. Anosov über die Existenz periodischer Lösungen von singulär gestörten Differentialgleichungssystemen verwendet wird.
    Notes: Abstract We show that the existence of wave trains with high velocity of generalized reaction-diffusion equations can be easily established by using a theorem of D. V. Anosov on the existence of periodic solutions of singularly perturbed differential systems.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric radiology 14 (1984), S. 400-403 
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract One hundred and ten children, ages 6 days to 14 years, were investigated for vesicoureteral reflux (VUR) using ultrasound before voiding cystourethrography (VCU). Sonographically a VUR was assumed if a retrovesical dilated ureter and/or an increase of the separation of the central renal echo complex (CRC) could be detected. By means of sonography VUR grades III and IV were seen in 100%, grade II in 84% of all cases. There was a false positive rate of 10%. Sonographic reflux study is a sensitive and specific screening and follow-up procedure for VUR.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 229 (1980), S. 107-114 
    ISSN: 1432-0711
    Keywords: Niedrig dosierte Kombinationspräparate ; Gonadotropine ; Follikuläre Aktivität ; LH-RH-Test ; Low-dosed combined OC ; Gonadotropins ; Follicular activity ; LH-RH-test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The effect of a new low-dosed combined oral contraceptive (OC) containing 37.5 μg ethinyl estradiol and 0.75 mg lynestrenol (Ovoresta M) upon gonadotropin release and follicular activity was studied in two groups of normally cyclic women. When the administration of the OC was started on day 1 of the cycle, the normal pattern of gonadotropin secretion was disrupted, and the midcycle LH and FSH peak was abolished. The mean level of LH and FSH was somewhat lower than in normal cycles, but the difference was not significant. In one case, serum estradiol rose to the level of the normal cycle indicating follicular activity. Even though there was a rise in serum estradiol to normal values when the OC was started on day 10 of the cycle (in 4/5), both the midcycle LH and FSH surge and ovulation were suppressed (in 3/4). The pituitary response to 100 μg LH-RH on day 21 was impaired. The LH-response correlated significantly with the serum estradiol concentration. In summary, the low-dosed OC exerts its effect by interfering with follicular ripening and inhibiting the preovulatory LH surge.
    Notes: Zusammenfassung Bei zwei Gruppen von Frauen mit normalem Zyklus wurde die Wirkung des neuen niedrig-dosierten Kombinationsprä parats Ovoresta M (37,5 μg Äthinyl Östradiol und 0,75 mg Lynöstrenol) auf die Gonadotropin-Freisetzung und die Follikel-Aktivität untersucht. Unter der Einnahme dieses Präparats vom 1. Zyklustag an war die Gonadotropin-Sekretion gestört und die präovulatorischen LH- und FSH-Gipfel waren unterdrückt. Im Durchschnitt waren die LH- und FSH-Spiegel etwas niedriger als im Normalzyklus; der Unterschied war jedoch nicht signifikant. In einem Fall stieg die Östradiol-Sekretion in Zyklusmitte wie in einem normalen Zyklus an, was auf eine Follikel-Aktivität schließen ließ. Obwohl ein Anstieg des Serum-Ö stradiols auf normale Werte beobachtet wurde, wenn mit der Einnahme des Präparats erst am Tag 10 des Zyklus begonnen wurde (bei 4/5), waren sowohl LH- und FSH-Gipfel als auch die Ovulation unterdrückt (bei 3/4). Die Hypophysen-Reaktion auf 100 μg LH-RH am Tag 21 war beeinträchtigt, wobei die LH-Freisetzung signifikant mit der Serumkonzentration des Östradiols korrelierte. Zusammenfassend läßt sich annehmen, daß niedrig-dosierte orale Kontrazeptiva durch Störung der Follikel-Reifung und Hemmung des präovulatorischen LH-Gipfels wirken.
    Type of Medium: Electronic Resource
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  • 8
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    Unknown
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 30:1 (1982) 126 
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  • 9
    ISSN: 1573-4978
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Free cytoplasmic 40S mRNP particles from rat liver were treated with EDTA and separated into two populations of RNP particles with sedimentation maxima of 20S and 35S, respectively. A characteristic set of distinct scRNAs is found for 20S and 35S RNP particles. The sequences of two of the most abundant scRNAs from 20S RNP particles with chain lengths of 104 (α1-RNA) and 124 (β1-RNA) nucleotides, respectively, are presented. α1-RNA shows a high sequence homology to the 3′-end of 18S rRNA. Since α1-RNA carries a cap, it cannot be a degradation product of 18S rRNA. The β1-RNA is strongly post-transcriptionally modified, but uncapped. When the individual scRNAs of 20S and 35S RNP particles isolated from preparative polyacrylamide gels were assayed for their capability to inhibit in vitro protein synthesis, several potent translational inhibitory RNAs were detected. Particularly, the scRNAs of 147, 203 and 263 nucleotide length associated with the 35S RNP particles turned out to be strong inhibitors of protein synthesis.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The cytoplasmic hydrogenase from Alcaligenes eutrophus (E.C.1.12.1.2.) was used to achieve continuous NADH regeneration. Cells were grown under heterotrophic conditions in a medium containing fructose and glycerol as carbon sources. A cell suspension with about 1 unit/ml activity was obtained. The enzyme was purified 20 fold with a 72 % yield and a final specific activity of 21 units/mg. The hydrogenase was covalently grafted onto corn stover particles for reactor application. The immobilized derivative shows a higher stability than the free enzyme. This hydrogenase preparation was used in combination with L-lactate dehydrogenase, to achieve the continuous reduction of pyruvate into lactate. For this purpose, both enzymes were simultaneously immobilized onto corn stover. Continuous NADH regeneration could thus be obtained over periods of time lasting over 45 hours, corresponding to 111 NADH regeneration cycles.
    Type of Medium: Electronic Resource
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