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  • 1
    Electronic Resource
    Electronic Resource
    THERMOSTABLE POLYGALACTURONASE SECRETED BY Sclerotinia fructigena (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 40 (1975), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1975.tb02220.x
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  • 2
    Electronic Resource
    Electronic Resource
    Active sodium transport by mammalian urinary bladder (1975)
    [s.l.] : Nature Publishing Group
    Nature 253 (1975), S. 747-748 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sheets of rabbit urinary bladder were mounted in vitro between temperature-controlled (37 C) Plexiglass chambers with 2 cm2 exposed. The bathing solution was 110 mM NaCl, 7 mM KC1, 25 mM NaHCO3, 2 mM CaCl2, 2 mM MgSO4, 1.2 mM NaH2PO4, and 10 mM glucose, gassed with 5% CO2-95% O2 OH 7.4). Three ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/253747a0
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  • 3
    Electronic Resource
    Electronic Resource
    Hypothesis for origin of planktonic patchiness (1976)
    [s.l.] : Nature Publishing Group
    Nature 259 (1976), S. 659-659 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The results that we describe depend on two hypothesised properties of the full equations: an autocatalytic effect in phytoplankton density which is attributed to a reduced efficiency of herbivory as phytoplankton density increases (a Moiling8 Type 2 functional response), and differential dispersal ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/259659a0
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  • 4
    Electronic Resource
    Electronic Resource
    Comparison of the pharmacokinetics of intravenous dl-propranolol in borderline and permanent hypertension (1976)
    Springer
    European journal of clinical pharmacology 10 (1976), S. 387-393 
    Details
    ISSN: 1432-1041
    Keywords: Pharmacokinetics ; dl-propranolol ; borderline hypertensives ; permanent hypertensives ; cardiac output
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In borderline and permanent hypertensives after rapid i.v. injection of dl-propranolol 0.2 mg/kg plasma levels were measured and were fitted to a two-compartment open-model. In borderline patients, characterized by a high basal cardiac output (CO), plasma levels were always lower than in permanent hypertensives. The biological half-life was reduced and the central volume of distribution, volume of distribution at pseudo-equilibrium and total clearance (TC) were markedly increased. In the overall population, there was a significant positive correlation between CO and TC. Rapid achievement of a predetermined plateau in each group constituted experimental proof of the validity of the two-compartment open-model for kinetic analysis of propranolol i.v. If kinetic parameters from permanent hypertensives were applied to borderline hypertensives a lower plateau was obtained. Thus, in so far as β-blockade is related to plasma level of propranolol, an increased intravenous dose may be required in patients with high CO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00563074
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  • 5
    Electronic Resource
    Electronic Resource
    The mechanism of Na+ transport by rabbit urinary bladder (1976)
    Springer
    The journal of membrane biology 28 (1976), S. 41-70 
    Details
    ISSN: 1432-1424
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary The mechanism of Na+ transport in rabbit urinary bladder has been studied by microelectrode techniques. Of the three layers of epithelium, the apical layer contains virtually all the transepithelial resistance. There is radial cell-to-cell coupling within this layer, but there is no detectable transverse coupling between layers. Cell coupling is apparently interrupted by intracellular injection of depolarizing current. The cell interiors are electrically negative to the bathing solutions, but the apical membrane of the apical layer depolarizes with increasingI sc. Voltage scanning detects no current sinks at the cell junctions or elsewhere. The voltage-divider ratio, α, (ratio of resistance of apical cell membrane,R a, to basolateral cell membrane,R b) decreases from 30 to 0.5 with increasingI sc, because of the transportrelated conductance pathway in the apical membrane. Changes in effective transepithelial capacitance withI sc are predicted and possibly observed. The transepithelial resistance,R t, has been resolved intoR a, Rb, and the junctional resistance,R j, by four different methods: cable analysis, resistance of uncoupled cells, measurements of pairs of (R t, α) values in the same bladder at different transport rates, and the relation betweenR t andI sc and between α andI sc.R j proves to be effectively infinite (nominally 300 kΩ μF) and independent ofI sc, andR a decreases from 154 to 4 kΩ μF with increasingI sc. In the resulting model of Na+ transport in “tight” epithelia, the apical membrane contains an amiloride-inhibited and Ca++-inhibited conductance pathway for Na+ entry; the basolateral membrane contains a Na+−K+-activated ATPase that extrudes Na+; intracellular (Na+) may exert negative feedback on apical membrane conductance; and aldosterone acts to stimulate Na+ entry at the apical membrane via the amiloride-sensitive pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01869690
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  • 6
    Electronic Resource
    Electronic Resource
    Na+ transport by rabbit urinary bladder, a tight epithelium (1976)
    Springer
    The journal of membrane biology 28 (1976), S. 1-40 
    Details
    ISSN: 1432-1424
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary By in vitro experiments on rabbit bladder, we reassessed the traditional view that mammalian urinary bladder lacks ion transport mechanisms. Since the ratio of actual-to-nominal membrane area in folded epithelia is variable and hard to estimate, we normalized membrane properties to apical membrane capacitance rather than to nominal area (probably 1 μF ∼ 1 cm2 actual area). A new mounting technique that virtually eliminates edge damage yielded resistances up to 78,000 ΩμF for rabbit bladder, and resistances for amphibian skin and bladder much higher than those usually reported. This technique made it possible to observe a transport-related conductance pathway, and a close correlation between transepithelial conductance (G) and short-circuit current (I sc) in these tight epithelia.G andI sc were increased by mucosal (Na+) [I sc∼0 when (Na+)∼0], aldosterone, serosal (HCO 3 − ) and high mucosal (H+); were decreased by amiloride, mucosal (Ca++), ouabain, metabolic inhibitors and serosal (H+); and were unaffected by (Cl−) and little affected by antidiuretic hormone (ADH). Physiological variation in the rabbits' dietary Na+ intake caused variations in bladderG andI sc similar to those caused by the expectedin vivo changes in aldosterone levels. The relation betweenG andI sc was the same whether defined by diet changes, natural variation among individual rabbits, or most of the above agents. A method was developed for separately resolving conductances of junctions, basolateral cell membrane, and apical cell membrane from thisG−I sc relation. Net Na+ flux equalledI sc. Net Cl− flux was zero on short circuit and equalled only 25% of net Na+ flux in open circuit. Bladder membrane fragments contained a Na+−K+-activated, ouabain-inhibited ATPase. The physiological significance of Na+ absorption against steep gradients in rabbit bladder may be to maintain kidney-generated ion gradients during bladder storage of urine, especially when the animal is Na+-depleted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01869689
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  • 7
    Electronic Resource
    Electronic Resource
    Der feste Zustand - Eine Einführung in die Festkörperchemie anhand sieben ausgewählter Beispiele. Von W. J. Moore. Friedr. Vieweg & Sohn Verlagsges. mbH, Braunschweig 1977. VIII, 164 S., 76 Abb., brosch. DM 22,80 (1978)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 12 (1978), S. 64-64 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19780120208
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  • 8
    Electronic Resource
    Electronic Resource
    Formation of Mn4+ centers in MgO powder due to nitrobenzene treatment in liquid phase (1979)
    Springer
    Reaction kinetics and catalysis letters 10 (1979), S. 347-351 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Методом ЭПР спектроскопии исследован порошок MgO, активированный в вакууме при 400°C, и пропитанныи нитробензолом. Было установлено, что образование центров mn4+ является результатом перехода электронов между нитробензолом и центрами примеси. По сравнению с методом парофазного контакта катализатора с нитробензолом, жидкофазное пропитывание дает гораздо меньшую концентрацию радикала-аниона нитробензола.
    Notes: Abstract MgO powders activated in vacuo at 400°C and impregnated with nitrobenzene were investigated by ESR spectroscopy. The formation of Mn4+ centers due to electron transfer between nitrobenzene and impurity centers was established. Liquid impregnation yields substantially fewer nitrobenzene anion radicals than vapor-contact between the catalyst and nitrobenzene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02075322
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  • 9
    Electronic Resource
    Electronic Resource
    Über Alkalimetall-Suboxide. VII. Das metallreichste Cäsiumoxid - Cs7O (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 422 (1976), S. 208-218 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Alkali Metal Suboxides. VII. The Caesium Oxide with the Highest Metal Content, CS7OPreparation, crystal growth and X-ray investigations with modified Guinier technique and single crystal diffractometer between 0° and -170°C are reported for the compound Cs7O. A simple nitrogen evaporator is described.  -  The structure of Cs7O corresponds to the formula [Cs11O3]Cs10. Single crystal investigations at -20 and -l70°C lead to nearly identical atomic distances within the “ionic cluster” Cs11O3, whereas distances between these clusters and within the oxygen free parts of the structure vary as in metallic caesium.
    Notes: Präparation, Einkristallzüchtung und röntgenographische Untersuchungen von Cs7O (modifizierte Guinier-Technik und Diffraktometer-Untersuchungen zwischen 0° und -170°C unter Verwendung eines einfachen N2-Verdampfers) werden beschrieben.  -  Der Aufbau von Cs7O entspricht der Formel [Cs11O3]Cs10. Strukturuntersuchungen bei -20 und -170°C ergeben konstante Atomabstände innerhalb der „ionischen Inseln“ Cs11O3. Die Abstandsänderungen zwischen diesen Gruppen und innerhalb der sauerstofffreien Teilstruktur entsprechen denen im metallischen Cäsium.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764220303
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  • 10
    Electronic Resource
    Electronic Resource
    Der elektrische Widerstand von metallreichen Rubidium- und Cäsium-Oxiden (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 447 (1978), S. 29-46 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Electrical Resistance of Rubidium and Caesium Oxides with High Metal ContentElectrical conductivities of Cs and Rb suboxides have been measured in the temperature range between 1.6 K and 350 K by means of a contactless eddy current method. The specific conductivities of the Cs compounds (Cs7O, Cs11O3) and the Rb compounds (Rb6O, Rb9O2) are found to be reduced by 60% and 40%, respectively, as compared to the elements Cs and Rb. Measurements on heterogeneous sample show an influence of grain boundaries only at oxygen contents higher than 13 at.-%. Metastable systems obtained by quenching of the melts exhibit interesting electrical properties. Samples of the composition CsxO (4 〈 x 〈 6) and RbxO (x ∼ 7) are easily obtained as amorphous metals. The irreversible temperature behaviour of the electrical resistivity is indicative of the complex ordering process leading to the crystalline phases.
    Notes: Mit Hilfe kontaktloser Induktionsmessungen werden die elektrischen Leitfähigkeiten von Cs- und Rb-Suboxiden bei Temperaturen zwischen 1,6 K und 350 K ermittelt. Im Vergleich zu den Elementen Cs und Rb werden um etwa 60% bzw. 40% verminderte spezifische Leitfähigkeiten für die Cs-Verbindungen (Cs7O, Cs11O3) bzw. die Rb-Verbindungen (Rb6O, Rb9O2) gefunden. Bei Messungen an heterogenen Gemengen machen sich die Korngrenzenbeiträge nur bei Sauerstoffgehalten oberhalb etwa 13 At.-% störend bemerkbar. Von besonderem Interesse sind die Messungen an metastabilen Systemen, die durch Abschrecken erhalten werden. Proben der Zusammensetzung CsxO (4 〈 x 〈 6) und RbxO (x ∼ 7) können leicht als amorphe Metalle erhalten werden. Der komplexe Ordnungsvorgang zu den kristallisierten Phasen drückt sich deutlich im (irreversiblen) Temperaturverlauf des elektrischen Widerstandes aus.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784470103
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