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  • 1
    Electronic Resource
    Electronic Resource
    Aortic fibrous components in exercised rats (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 371-372 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In exercised female rats, the elastin content of the thoracic and abdominal aorta decreased by 4–8% (p〈0.05). The collagen content in the thoracic aorta, was unchanged but in the abdominal aorta was reduced by 5.2% (p〈0.05). These results are discussed in connection with physical training.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01963128
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  • 2
    Electronic Resource
    Electronic Resource
    Dopamine-β-hydroxylase activity in stroke-prone spontaneously hypertensive rats (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 305-306 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Dopamine-β-hydroxylase (DBH) activity was higher in the serum, the mesenteric artery and the cerebral cortex of 4-week-old stroke-prone spontaneously hypertensive rats (SHRSP), and lower in the nucleus tractus solitarii than it was in spontaneously hypertensive rats (SHR).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01923000
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  • 3
    Electronic Resource
    Electronic Resource
    On Macdonald's formula for the volume of a compact Lie group (1997)
    Springer
    Commentarii mathematici Helvetici 72 (1997), S. 660-662 
    Details
    ISSN: 1420-8946
    Keywords: Key words. Compact Lie group, Todd class.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract. We give a simple proof of Macdonald's formula for the volume of a compact Lie group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000140050040
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  • 4
    Electronic Resource
    Electronic Resource
    Central monoamines and the death process time (antemortem time) during asphyxia (1984)
    Springer
    International journal of legal medicine 93 (1984), S. 211-218 
    Details
    ISSN: 1437-1596
    Keywords: Monoamines, asphyxia ; Antemortal alternation, catecholamine and serotonin in mouse brain ; Ersticken, Konzentrationsänderung der Monoamine ; Monoamine, Verhalten bei Asphyxie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Die Konzentrationsänderung der Monoamine Norepinephrin (NE), Dopamin (DA) und Serotonin (5-HT) im Gehirn wurde während der akuten Asphyxie (Strangulation, Anoxie und Ertrinken) experimentell an Mäusen untersucht. In verschiedenen Versuchsgruppen wurde eine signifikante, lineare Abhängigkeit der Monoamin-Werte NE, DA, und 5-HT zur Länge des agonalen Stadiums beobachtet, wobei folgende Korrelationskoeffizienten errechnet wurden: r=0,50, 0,98, (P〈0,05) und 0,57. Hieraus wird geschlossen, daß die Konzentration des NE und 5-HT im Gehirn bei den asphyktischen Tieren zunimmt, die das 5-HT bei den Tieren unter Anoxie abfällt, hingegen einen etwa zweifachen Anstieg bei den Tieren aufweist, die ertranken. Darüber hinaus ließ sich eine Tendenz zu höheren DA-Werten feststellen, die in Abhängigkeit zur Länge der agonalen Phase steht.
    Notes: Summary The changes of the brain monoamines, norepinephrine (NE), dopamine (DA), and serotonin (5-HT), during acute asphyxia, caused by strangulation, anoxia, and drowning, were studied in the mouse. In several asphyxiated animal groups significant linear correlation was found between the level of monoamines, NE, DA, and 5-HT, and the death process times or antemortem times were r=0.50, 0.98 (P〈0.05), and 0.57, respectively. It is concluded that the level of brain NE and DA increased in the mouse that died of asphyxia, and the level of 5-HT showed only an apparent decrease in anoxia groups as compared with the control group and showed a twice as high increase in drowning groups. Especially, there was a tendency that the longer the death process times or antemortem times, the higher was the level of DA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00200452
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  • 5
    Electronic Resource
    Electronic Resource
    Cytomegalie der Kopfspeicheldrüsen bei SIDS (1988)
    Springer
    International journal of legal medicine 99 (1988), S. 281-289 
    Details
    ISSN: 1437-1596
    Keywords: Cytomegaly, SIDS ; SIDS, cytomegaly ; Cytomegalie, SIDS ; SIDS, Cytomegalie der Kopfspeicheldrüsen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Es erfolgte eine retrospektive mikromorphologische Analyse der Glandula parotis und/oder der Glandula submandibularis von 180 plötzlichen Kindstodesfällen in Berlin und 75 Fällen in Hamburg. Erfaßt wurden Fälle der letzten 10 Jahre mit einem Alter zwischen 2 Wochen und einem Lebensjahr. — Typische CMV-Einschlußkörper wurden im Berliner Material in 18 Fällen (10%; Mädchen mehr als Jungen) und im Hamburger Material in 6 Fällen (7%; Jungen mehr als Mädchen) diagnostiziert. Während die meisten SIDS-Fälle sich im zweiten und dritten Lebensmonat ereigneten, war bei den CMV-Infektionen kein Altersgipfel festzustellen. Virusmaterial war mit immunhistochemischen Unterschungen sowie in-situ-Hybridisierung auch in histologisch unauffälligen Zellen nachzuweisen. — Unter Berücksichtigung der bekannten klinischen und epidemiologischen Daten zur Cytomegalie stellt die Diagnose einer lokalisierten Infektion der Kopf-speicheldrüsen keine befriedigende Erklärung für den plötzlichen Tod der Säuglinge dar; diese Befunde sind jedoch besonders beachtenswert als Hinweis auf eine Schwäche des Immunsystems.
    Notes: Summary The parotid gland and/or the submandibular gland in SIDS cases (180 from Berlin und 75 cases from Hamburg) were examined by means of HE staining, immunohistochemical analysis, in situ hybridization and electron microscopy. The SIDS cases were taken from the last 10 years; the age of the children ranged from 2 weeks to 1 year. Typical cytomegaly inclusion bodies were recognized in 10% (18 cases from Berlin; more girls than boys) and 7% (6 cases from Hamburg; more boys than girls). Our files indicate that the frequency of CMV infection was not age-dependent within the first 12 months of life. Using immunohistochemical analysis and in situ hybridization, virus substances were detected in cytomegal cells as well as in morphologically uninfected cells. The literature on the clinical and epidemiological aspects of cytomegaly indicates that a localized CMV infection of the salivary glands does not sufficiently explain the sudden death of these infants; however, it should be emphasized that cytomegaly can influence the immunological status of the organism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204439
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  • 6
    Electronic Resource
    Electronic Resource
    Reforming of hexane with Pt/zeolite catalysts (1997)
    Springer
    Catalysis letters 45 (1997), S. 107-112 
    Details
    ISSN: 1572-879X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Aromatization and isomerization of n- hexane catalyzed by Pt/zeolite were investigated. For Pt/K- β and Pt/K-mordenite as well as for Pt/K-L, the addition of KCl resulted in an increase in selectivity for benzene formation accompanied with a decrease in selectivity for hydroisomerization. A parallelism was found between changes in the benzene selectivity with the KCl addition and in the terminal cracking index. The treatment of Pt/K-FSM-16 with K2CO3 resulted in a decrease in cracking products and an increase in benzene selectivity. At 523 K, Pt/H- FSM-16 catalyst showed high selectivity for methylcyclopentane and cyclohexane. At 623 K, it showed high and durable isomerization activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019003325897
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  • 7
    Electronic Resource
    Electronic Resource
    Pig-skin epidermal calmodulin: Effects of antagonists of calmodulin on DNA synthesis of pig-skin epidermis (1985)
    Springer
    Archives of dermatological research 278 (1985), S. 133-137 
    Details
    ISSN: 1432-069X
    Keywords: Calmodulin ; Keratinocytes ; Epidermis ; DNA synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Although epidermal keratinocytes contain significant amounts of calmodulin, the exact role of calmodulin in epidermal biological activity remains to be determined. Pig-skin (epidermal) calmodulin was purified to homogeneity by DEAE/Sepharose- and phenothiazine-affinity-column chromatography. The characteristics of the purified calmodulin proved to be in good agreement with those of calmodulin obtained from other sources. Phenothiazines (trifluoperazine and chlorpromazine), mepacrine, propranolol, and colchicine inhibited the effect of the purified epidermal calmodulin on the calmodulin-deficient phosphodiesterase of bovine heart. These calmodulin antagonists all had inhibitory effects on the thymidine incorporation of pig-skin epidermal keratinocytes. These observations support the assumption that calmodulin might play an important role in epidermal keratinocyte proliferation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409220
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  • 8
    Electronic Resource
    Electronic Resource
    Experimental studies on the mechanism of ethanol formation in corpses (1988)
    Springer
    International journal of legal medicine 101 (1988), S. 21-26 
    Details
    ISSN: 1437-1596
    Keywords: Ethanol formation in corpses ; Ethanol and saprogens ; Ethanolneubildung in Leichen ; Stoffwechselvorgänge bei Ethanolneubildung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Um den Mechanismus der Neubildung von Ethanol im Leichnam zu erhellen, wurden verschiedene Versuche unternommen. In Blutproben, gelagert bei Raumtemperatur, war nur eine unerhebliche Produktion von Ethanol nachweisbar, auch nach Zusatz von Glukose fand sich nur wenig Ethanol. Bei zusätzlicher Beimengung von Fäulnisbakterien war eine erhebliche Ethanolproduktion feststellbar. Zu Blut-Leberhomogenaten wurden verschiedene Stoffe zugesetzt und die Proben im Brutschrank bei 37°C aufbewahrt. Unter täglichem Zusatz eines Antibiotikums wurde Ethanol kaum produziert. Unter täglichem Zusatz von ADH und NADH nahm die Menge des produzierten Ethanols mäßig zu. Bei einmaliger Zugabe von Acetaldehyd wurde am ersten Tag die Produktion von Ethanol zurückgehalten, zeigte jedoch ab dem zweiten Tag fortlaufend höhere Werte als die Kontrollen. Ähnliche Ergebnisse fanden sich nach einmaligem Zusatz von Brenztraubensäure. Pyrazol, Cyanamid und Disulfiram verhinderten die Produktion von Ethanol völlig. Aufgrund der Befunde ist anzunehmen, daß die Produktion von Ethanol im Leichnam durch Stoffwechselvorgänge zustande kommt, die den beim Lebenden entgegenerichtet sind, wobei Enzyme wie ADH, A1DH etc. von Fäulniserregern mitwirken, die Kohlenhydrate als Stoffwechselsubstrat benützen.
    Notes: Summary Various in vitro experiments were performed for the purpose of clarifying the mechanism of ethanol production in corpses. Whereas a negligible quantity of ethanol was produced in the blood alone, which was left at room temperature, the quantity of ethanol was slightly increased by addition of glucose to the blood. When saprogens were further added, the quantity was markedly increased. Various materials were added to blood-liver homogenates as specimens, and the mixtures were stored in an incubator at 37°C. As a result of the addition of an antibiotic to the mixture every day, there was hardly any production of ethanol. When alcohol dehydrogenase (ADH) and reduced nicotinamide adenine dinucleotide (NADH) were added, ethanol production was slightly increased. When acetaldehyde was added first, ethanol production was inhibited the next day, but on and after day 2, the quantity of ethanol was more than that in the control material. When pyruvic acid was added first, the results were similar to the above. Pyrazole, cyanamide, and disulfiram completely inhibited the production of ethanol. Ethanol production in corpses is believed to take place through a pathway opposite to that of ethanol metabolism in the living body, under the influence of ADH, ALDH, etc., in saprogens using carbohydrates as substrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00205320
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  • 9
    Electronic Resource
    Electronic Resource
    Should aphids attract or repel ants? Effect of rival aphids and extrafloral nectaries on ant–aphid interactions (2000)
    Springer
    Population ecology 42 (2000), S. 171-178 
    Details
    ISSN: 1437-5613
    Keywords: Key words Interspecific relationships ; Indirect interactions ; Mutualism ; Competition ; Honeydew ; Extrafloral nectary ; Myrmecophily
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Among plants and herbivores, two types of conflicts occur in relation to mutualism with ants: one is competition for ant mutualism among myrmecophilous herbivores and plants, and the other is the conflict whether to attract or repel ants between myrmecophiles and nonmyrmecophiles that are damaged by ants. We investigated the extent to which two species of aphids (Megoura crassicauda and Aphis craccivora) and extrafloral nectaries on their host plant (Vicia faba var. minor) interact with one another for their relationships with ants. We designed an experiment where ants can choose to visit seedlings colonized by (1) M. crassicauda, (2) A. cracivora, (3) both aphid species, or (4) neither aphid species. Ants preferred A. craccivora to extrafloral nectaries and avoided tending M. crassicauda. We also analyzed the population growth of each aphid when it coexists with (1) ants, (2) the other aphid species, (3) ants and the other aphid species, or (4) neither of them. Under ant-free conditions, we detected an exploitative competition between the two aphid species. The ants had no significant effect on the population of A. craccivora, whereas they had negative effects on the population growth of M. crassicauda by attacking some individuals. When both aphids coexisted, M. crassicauda suffered ant attack more intensely because A. craccivora attracted more ants than extrafloral nectaries despite ant-repelling by M. crassicauda. On the other hand, the ants benefited A. craccivora by eliminating its competitor. To avoid ant attack, aphids may have been selected either to be more attractive to ants than other sympatric sugar sources or to repel the ants attracted to them. We hypothesize that competition among sympatric sugar sources including rival aphids and extrafloral nectaries is a factor restricting aphids to be myrmecophilous.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00011996
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  • 10
    Electronic Resource
    Electronic Resource
    Reduced superoxide dismutase activity in UVB-induced hyperproliferative pig epidermis (1991)
    Springer
    Archives of dermatological research 283 (1991), S. 317-320 
    Details
    ISSN: 1432-069X
    Keywords: Superoxide dismutase ; UVB irradiation ; Epidermis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Decreased superoxide dismutase (SOD) activity has been reported in various hyperproliferative keratinocytes. In order to elucidate the relationship between epidermal SOD activity and keratinocyte proliferation, we employed in vivo UVB irradiation. Following UVB irradiation at twice the minimum erythema dose, pig epidermis revealed an initial decrease in thymidine incorporation and mitotic counts for at least 48 h, followed by a marked increase, the peak of which was observed at 96 h after irradiation, and a return to basal levels by 5–7 days. The SOD activity remained constant during the initial 48 h and then decreased to about 50% at 96 h, mainly due to a decresed Cu,Zn-SOD activity. Our results indicate that the increased keratinocyte proliferation induced by UVB irradiation is accompanied by a decrease in SOD activity, and that this decrease is mainly due to a decreased Cu,Zn-SOD activity. No alteration in SOD activity was noted during the initial hypoproliferative phase following irradiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00376620
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