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  • General Chemistry  (5)
  • Polymer and Materials Science  (5)
  • Biliary Excretion  (2)
  • Dineura virididorsata  (2)
  • Hymenoptera  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Reproductive behaviour of mated and virgin females of a solitary sawflyDineura virididorsata (1994)
    Springer
    Entomologia experimentalis et applicata 70 (1994), S. 83-90 
    Details
    ISSN: 1570-7458
    Schlagwort(e): Hymenoptera ; Symphyta ; Tenthredinidae ; Dineura virididorsata ; sawfly ; sex ratio ; oviposition behaviour ; mating behaviour
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Sex ratios of the arrhenotokous sawflyDineura virididorsata Retz. (Hymenoptera: Tenthredinidae) are variable among populations in the field, but are biased in favour of females. We have concluded elsewhere that the sex ratios of this species cannot be satisfactorily explained by any general sex ratio model that is available. Here we present data on the different behavioural traits that are relevant to interpretation of the evolution of female-biased sex ratios under local mate competition. We report on oviposition behaviour, mating behaviour and the patterns of movement of ovipositing virgin and mated females. Our results show that adult emergence is synchronous and females will mate daily with different males (in the laboratory, at least). This would decrease the relatedness of offspring should it also take place in the field. In addition, ovipositing females (mated and virgin) leave their site of release in a relatively short time and deposit few eggs relative to their capabilities, so siblings are unlikely to be clumped. The time that virgins spend in deposition of an egg is not different from that spent by mated females, so there is no differential ‘investment’ in this regard. These behavioural observations agree with our previous conclusion that the preconditions of current sex ratio theories are not met byD. virididorsata.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02380634
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  • 2
    Digitale Medien
    Digitale Medien
    Effect of nafenopin (SU-13, 437) on liver function (1975)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 290 (1975), S. 235-250 
    Details
    ISSN: 1432-1912
    Schlagwort(e): Nafenopin ; Biliary Excretion ; Hepatic Uptake ; Hypolipidemic Agents ; Dibromosulphthalein
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Rats treated with the hypolipidemic agent, nafenopin (SU-13, 437) exhibit a higher plasma retention and a markedly reduced biliary excretion of organic anions, such as sulfobromophthalein (BSP) and its dibromo analog (DBSP), indocyaninegreen (ICG), succinylsulfathiazole (SST) and polar metabolites of bilirubin and the carcinogens 7, 12-dimethylbenzanthracene (DMBA) and 3,4-benz-pyrene (BP), despite an increase in liver mass and a profound choleresis. However, taurocholate is not affected in this manner, which supports the idea of a transport mechanism for taurocholate that differs from that of other organic anions. A pharmacokinetic study was made for DBSP in vivo. After nafenopin treatment, primary hepatic uptake (k12) and transport from liver into bile (k23) are reduced in vivo. Infusion studies indicate that biliary transport maximum (Tm) for DBSP is also decreased although the calculated hepatic storage (S) is only moderately affected. In the isolated perfused liver, hepatic clearance and biliary excretion of BSP are reduced by two-thirds. The time course of anion tranport inhibition and the hepato-biliary disposition of 14C-nafenopin suggest a direct effect of the drug. The extra liver mass induced by nafenopin appears to be hypo- or nonfunctional with respect to hepatic transport of organic anions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00510553
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  • 3
    Digitale Medien
    Digitale Medien
    Effect of nafenopin (SU-13,437) on liver function (1975)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 290 (1975), S. 221-234 
    Details
    ISSN: 1432-1912
    Schlagwort(e): Biliary Excretion ; Choleresis ; Nafenopin Enterohepatic Circulation ; Pharmacokinetics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Administration of nafenopin (SU-13-437) to male rats for two days leads to a doubling of bile production and a 50% increase in liver weight. These two effects have been shown not to be directly interrelated. A marked decrease in biliary bile salt concentration suggests that the bile salt independent flow is stimulated. The extra bile produced is probably of canalicular origin since bile to plasma concentration ratios of erythritol are unchanged. At least three polar metabolites of nafenopin have been observed in rat bile. Obervations in rats with partial biliary fistulas indicate that the drug and its metabolites undergo extensive enterohepatic circulation. Our studies support the view that much of the enhanced bile flow is associated with the presence of nafenopin and/or its metabolites within the hepatobiliary system. However, the response is too extensive to be explained merely by osmotic choleresis. Induced structural changes in the liver may also account for some of this effect.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00510552
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  • 4
    Digitale Medien
    Digitale Medien
    Resource quality and spatial variation in sex ratios of a free-living solitary sawfly, Dineura virididorsata (Hym., Tenthredinidae) (1993)
    Springer
    Oecologia 96 (1993), S. 420-425 
    Details
    ISSN: 1432-1939
    Schlagwort(e): Biased sex ratios ; Dineura virididorsata ; Sex-related survival ; Local mate competition ; Foliage quality
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The sex ratio in final-instar larvae of a birch-feeding, free-living solitary sawfly, Dineura virididorsata, was investigated in Finnish Lapland. The prepupal proportion of females, pooled over ten sites, was 56%, and at four individual sites the sex ratio was significantly female-biased. Larval survival from egg to prepupae did not differ between the sexes. This suggests a femalebiased primary sex ratio in the field. The sex ratio varied among the sites but not among host trees within sites. Contrary to previous results with hymenopterans, we did not find that differences in the sex ratio depended on forage quality: site-specific or tree-specific sex ratios did not correlate with the average prepupal weight. A literature search indicated that female-biased sex ratios are also common in other free-living sawflies. We are unable to explain sex ratios of Dineura virididorsata or other free-living sawflies with existing general models.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00317514
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  • 5
    Digitale Medien
    Digitale Medien
    Unisexual broods and sex ratios in a polyembryonic encyrtid parasitoid (Copidosoma sp.: Hymenoptera) (1992)
    Springer
    Oecologia 89 (1992), S. 147-149 
    Details
    ISSN: 1432-1939
    Schlagwort(e): Sex ratio ; Polyembryony ; Hymenoptera ; Parasitoid ; Copidosoma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary We examined brood sex ratios of an undetermined species of Copidosoma. Most broods (65%) were unisexual, with a greater proportion of female broods. Some mixed broods contained extremely small proportions of wasps of the opposite sex. Our results imply that the female-biased sex rations in this species cannot be explained by local mate competition theory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00319027
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  • 6
    Digitale Medien
    Digitale Medien
    Kathodische Korrosion von Blei im Erdboden (1969)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 578-583 
    Details
    ISSN: 0947-5117
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Beschreibung / Inhaltsverzeichnis: Cathodic corrosion of lead in the soilCathodic corrosion of lead in the soil can be expected in exceptional cases only. The corrosion found on a particular lead cable could be simulated in the laboratory. It could be confirmed, that  -  probably by decomposition of primary lead hydride  -  metallic lead is deposited below layers of Ca and Mg compounds already at potentials below -1,7 V. A special switching method was developed to account for breakthrough polarisation.
    Notizen: Kathodische Korrosion von Blei im Boden ist grundsätzlich nur in Ausnahmefällen zu erwarten. Diese an einem Kabel gefundene Korrosion wurde im Laboratorium nachgebildet. Hierbei konnte bestätigt werden, daß unter Deckschichten aus Calcium- und Magnesiumverbindungen bei Potentialen schon unter -1,7 V metallisches, Blei abgeschieden wurde, wahrscheinlich durch Zersetzung von primär entstandenem Bleihydrid. Für derartige Untersuchungen wurde eine spezielle Schaltmethode entwickelt, bei welcher auch die Durchtrittspolarisation berücksichtigt wird.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/maco.19690200704
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  • 7
    Digitale Medien
    Digitale Medien
    Kunststoffe im Automobilbau - Anwendung und Wiederverwertung (1991)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 22 (1991), S. 275-278 
    Details
    ISSN: 0933-5137
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/mawe.19910220710
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  • 8
    Digitale Medien
    Digitale Medien
    Untersuchung von vinylpyridiniumverbindungen IV.III. I. MIELKE und H. RINGSDORF, Makromol. Chem. 142 (1970) 319. Polyreaktionen von 2-vinylpyridiniumsalzen (1971)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 149 (1971), S. 295-301 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1971.021490124
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  • 9
    Digitale Medien
    Digitale Medien
    Optisch aktives 2-Phenyl-3,4-dimethyl-morpholin (1956)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 68 (1956), S. 181-182 
    Details
    ISSN: 0044-8249
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/ange.19560680508
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  • 10
    Digitale Medien
    Digitale Medien
    Gewässerschutz in der BASF AG, Ludwigshafen (1978)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 50 (1978), S. 510-518 
    Details
    ISSN: 0009-286X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Waste water purification at BASF, Ludwigshafen/Rh. The manifold problems encountered in the field of waste water treatment in the chemical industry are considered, together with the tasks involved, possible solutions, and costs incurred, for the example of BASF AG in Ludwigshafen. This example is particularly interesting because it shows how the waste water problems of a chemical factory that has been in existence for over a centurvey could be solved in the course of a ten-year plan. Twenty years after the inception of this plan, costs and success can now be quantified.
    Zusätzliches Material: 13 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cite.330500705
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