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  • 1
    Electronic Resource
    Electronic Resource
    Bildungsenthalpie von Uranpentachlorid (1971)
    Springer
    Monatshefte für Chemie 102 (1971), S. 924-927 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Standardbildungsenthalpie von UCl5 [ΔH B ,298/0 UCl5 (s)=−247,7±0,5 kcal/Mol (−1036,4±2,1 kJ/ Mol)] wurde bestimmt, indem man Uran mit gasförmigem Chlor in Gegenwart eines Überschusses an flüssigem Chlor bei 298° K zur Reaktion brachte.
    Notes: Abstract The standard enthalpy of formation of UCl5 has been determined as ΔH f ,298/0 UCl5 (s)=−247.7±0.5 kcal/mol (−1036.4±2.1 kJ/mol) by reacting uranium with chlorine gas in the presence of excess liquid chlorine at 298° K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01167276
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  • 2
    Electronic Resource
    Electronic Resource
    Konstitution und physikalische Eigenschaften von Äthern, 6. Mitt.: Über die Viskositäts-Temperatur-Abhängigkeit von Glykoläthern (1960)
    Springer
    Monatshefte für Chemie 91 (1960), S. 48-56 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Das Viskositäts-Temperatur-Verhalten von 45 gemischten Äthern des Glykols, Diglykols, Triglykols und Butandiols-(1,4) wird diskutiert. Innerhalb der homologen Reihen der Äther steigt die Viskosität, jedoch nimmt die Temperaturabhängigkeit ab, und zwar stärker als bei den Paraffinen vergleichbarer Kettenlänge (Tab. 1 und 2). Ausgehend von derUmstätter-Gleichung wird eine Form entwickelt, die die Berechnung der „Steilheit”n vereinfacht. Als zweite Kennzahl für das Viskositäts-Temperaturverhalten wird die Temperatur benutzt, für diev=1 cSt wird.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00903169
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  • 3
    Electronic Resource
    Electronic Resource
    Äther-Ester und Diäther von Äthylenglykolen (1968)
    Springer
    Monatshefte für Chemie 99 (1968), S. 652-657 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Für Untersuchungen über das Viskositäts- und Dichte-Temperatur-Verhalten und andere physikalische Eigenschaften wurden Äther-Ester und einige Diäther des Äthylenglykols synthetisiert. Die Verbindungen sind so ausgesucht, daß sie in einem experimentell leicht zugänglichen Temperaturbereich kinematische Viskositäten zwischen 1 und 15 cSt aufweisen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901216
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of dietary nicotine on the fall armyworm, Spodoptera frugiperda and its parasitoid, the ichneumonid wasp Hyposoter annulipes (1988)
    Springer
    Entomologia experimentalis et applicata 46 (1988), S. 227-232 
    Details
    ISSN: 1570-7458
    Keywords: tri-trophic level interactions ; nicotine ; alkaloid ; Hyposoter annulipes ; Hymenoptera ; Ichneumonidae ; fall armyworm ; Spodoptera frugiperda ; Lepidoptera ; Noctuidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des quantités croissantes de nicotine dans l'alimentation ont prolongé la durée du développement des chenilles saines, bien que l'effet ait chuté aux concentrations les plus élevées. Le sexe de la noctuelle n'a pas eu d'effet sur la durée du développement ou l'action de la nicotine. L'influence de la nicotine sur le poids des chrysalides est inhabituel, en ce sens que les chrysalides les plus lourdes ont été obtenues aux concentrations moyennes. Des hypothèses sont proposés sur l'origine de ce phénomène. La mortalité et la durée de développement de H. annulipes ont augmenté et le poids des adultes a diminué quand la concentration de l'aliment de l'hôte en nicotine s'est élevée. L'effet différente de la nicotine sur des générations successives a pu provenir de modifications de la toxicité de la nicotine en fonction de changements dans la qualité de l'aliment. Quoi qu'il en soit, l'augmentation de la concentration de la nicotine dans l'alimentation de l'hôte a eu un effet négatif cohérent sur la valeur adaptative de H. annulipes.
    Notes: Abstract Experiments were conducted to determine the influence of nicotine (at a range of concentrations) in the food of an herbivorous host on the development, size and survival of its parasitoid. Fall armyworms, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) were reared on diets of 0, 0.025, 0.050 and 0.075% nicotine and exposed to parasitism by Hyposoter annulipes (Hymenoptera: Ichneumonidae). As nicotine concentration increased parasitoid mortality and development time increased and adult weight decreased. Development time, pupal weight and survival were recorded for unparasitized armyworms. Unparasitized fall armyworms showed lengthened development and higher mortality but pupal weights were greatest at intermediate nicotine concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364193
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  • 5
    Electronic Resource
    Electronic Resource
    2,6-Diamino-2,6-Didesoxy-D-Allose aus Glukosamin unter Verwendung einer Inversion mit Thionylchlorid (1964)
    Springer
    Naturwissenschaften 51 (1964), S. 509-510 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00632214
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of a Total Solar Eclipse on the Mesoscale Atmospheric Circulation over Europe – A Model Experiment (1999)
    Springer
    Meteorology and atmospheric physics 71 (1999), S. 229-242 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary ¶On August the 11th, 1999 Central Europe saw a spectacular astronomical event, a total solar eclipse. We present a model study concerning the meteorological effects of this eclipse in central Europe using the state-of-the-art limited area forecast model Deutschland-Modell DM from the German Weather Service DWD. Under typical summer radiation conditions very strong anomalies in the surface energy flux and temperature in screen height are simulated. The main temperature signal in the lower troposphere is delayed by about one hour with respect to the surface. Furthermore it is connected with a well defined dynamical signal which is reminiscent to a large scale land – sea circulation. The event could be used as a test case for mesoscale atmospheric models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007030050057
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  • 7
    Electronic Resource
    Electronic Resource
    Computers, policymaking, and reality (1971)
    Springer
    Policy sciences 2 (1971), S. 87-93 
    Details
    ISSN: 1573-0891
    Source: Springer Online Journal Archives 1860-2000
    Topics: Political Science , Economics
    Notes: Conclusion Dr. Bobrow's paper is a contribution to a body of literature distinguished by its paucity. As a contribution to current attempts to resurrect, rediscover, or spawn a new body of knowledge called the policy sciences, it is a useful foundation that should be built on through intensive, rigorous research into the likely role of the computer in improving the public policymaking processes. The paper raises indirectly a number of questions that could be researched profitably. These questions relate to: (1) the future effect of the computer on administrative responsibility, accountability, and responsiveness, assuming systems such as proposed by Bobrow are desirable and/or feasible. (2) the effect of the computer in improving the information at present available in different policymaking areas at different levels of government. (3) the relevance of contemporary computer education for policymakers in university programs aimed at training the new breed of policy analyst. (4) the cost-effectiveness of different variations on the theme proposed by Bobrow, including the viability of interactive versus noninteractive (or off-line) computer systems. The ball seems to be at the feet of the public policymaker and the educator to expand on Bobrow's theme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411216
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  • 8
    Electronic Resource
    Electronic Resource
    Alkaline inorganic pyrophosphatase and starch synthesis in amyloplasts (1986)
    Springer
    Planta 167 (1986), S. 140-145 
    Details
    ISSN: 1432-2048
    Keywords: Alkaline pyrophosphatase ; Amyloplast ; Arum (starch synthesis) ; Glycine (starch synthesis) ; Starch synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The aim of this work was to see if amyloplasts contained inorganic pyrophosphatase. Alkaline pyrophosphatase activity, largely dependant upon MgCl2 but not affected by 100 μM ammonium molybdate or 60–100 mM KCl, was demonstrated in exracts of developing and mature clubs of the spadix of Arum maculatum L. and of suspension cultures of Glycine max L., but not in extracts of the developing bulb of Allium cepa L. The maximum catalytic activity of alkaline pyrophosphatase in the above tissues showed a positive correlation with starch synthesis, and in the first two tissues was shown to exceed the activity of ADPglucose pyrophosphorylase. Of the alkaline pyrophosphatase activity in lysates of protoplasts of suspension cultures of Glycine max, 57% was latent. Density-gradient centrifugation of these lysates showed a close correlation between the distribution of alkaline pyrophosphatase and the plastid marker, nitrite reductase. It is suggested that much, if not all, of the alkaline pyrophosphatase in suspension cultures of Glycine max is located in the plastids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446381
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  • 9
    Electronic Resource
    Electronic Resource
    Löslichkeit (1932)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 90 (1932), S. 40-44 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01333541
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  • 10
    Electronic Resource
    Electronic Resource
    Colicin M is inactivated during import by its immunity protein (1996)
    Springer
    Molecular genetics and genomics 251 (1996), S. 388-396 
    Details
    ISSN: 1617-4623
    Keywords: Escherichia coli ; Colicin M ; Immunity ; Periplasm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Colicin M (Cma) displays a unique activity that interferes with murein and O-antigen biosynthesis through inhibition of lipid-carrier regeneration. Immunity is conferred by a specific immunity protein (Cmi) that inhibits the action of colicin M in the periplasm. The subcellular location of Cmi was determined by constructing hybrid proteins between Cmi and the TEM-β-lactamase (BlaM), which confers resistance to ampicillin only when it is translocated across the cytoplasmic membrane with the aid of Cmi. The smallest Cmi'-BlaM hybrid that conferred resistance to 50 μg/ml ampicillin contained 19 amino acid residues of Cmi; cells expressing Cmi'-BlaM with only five N-terminal Cmi residues were ampicillin sensitive. These results support a model in which the hydrophobic sequence of Cmi comprising residues 3–23 serves to translocate residues 24–117 of Cmi into the periplasm and anchors Cmi to the cytoplasmic membrane. Residues 8–23 are integrated in the cytoplasmic membrane and are not involved in Cma recognition. This model was further tested by replacing residues 1–23 of Cmi by the hydrophobic amino acid sequence 1–42 of the penicillin binding protein 3 (PBP3). In vivo, PBP3'-'Cmi was as active as Cmi, demonstrating that translocation and anchoring of Cmi is not sequence-specific. Substitution of the 23 N-terminal residues of Cmi by the cleavable signal peptide of BlaM resulted in an active BlaM'-'Cmi hybrid protein. The immunity conferred by BlaM'-'Cmi was high, but not as high as that associated with Cmi and PBP3'-'Cmi, demonstrating that soluble Cmi lacking its membrane anchor is still active, but immobilization in the cytoplasmic membrane, the target site of Cma, increases its efficiency. CmiΔ1-23 remained in the cytoplasm and conferred no immunity. We propose that the immunity protein inactivates colicin M in the periplasm before Cma can reach its target in the cytoplasmic membrane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02172531
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