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  • 1
    Online Resource
    Online Resource
    Acoustical Imaging. (1995)
    New York, NY :Springer,
    Details
    Keywords: Acoustic imaging-Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (803 pages)
    Edition: 1st ed.
    ISBN: 9781461519430
    Series Statement: Acoustical Imaging Series ; v.21
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=6492876
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    The coexistence of pressure waves in the operation of quartz-crystal shear-wave sensors (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 2524-2532 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is demonstrated that an AT-cut quartz crystal driven in the thickness-shear-wave mode and typically used as a sensor to monitor the viscoelastic shear-wave properties of a fluid also produce longitudinal pressure waves. Unlike the shear wave, these waves are capable of long-range propagation through the fluid and of reflection at its boundaries, notably at an outer fluid–air interface. They introduce a component into the measured electrical impedance and resonance frequency shift of the crystal, which reflects the setting up of cyclic pressure-wave resonances in the fluid. This has important implications for the practical employment of these crystal as sensors. Under appropriate conditions, as demonstrated for water and n-octane, it is possible to determine the propagating properties of sound waves in a fluid simultaneously with the viscoelastic shear-wave properties. These experiments are supported by an analysis of the appropriate hydrodynamic equations for waves in the crystal–fluid system, which predicts electrical characteristics in close agreement with those found experimentally. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366990
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    THE BIOSYNTHESIS OF CHOLESTEROL AND OTHER STEROLS BY BRAIN TISSUE: DISTRIBUTION IN SUBCELLULAR FRACTIONS AS A FUNCTION OF TIME AFTER INJECTION OF [2-14C]MEVALONIC ACID, SODIUM [2-14C]ACETATE AND [U-14C]GLUCOSE INTO 15-DAY-OLD RATS (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 24 (1975), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The distribution of [14C]-labelled material into subcellular fractions of 15-day-old rat brain was studied at 2 and 24 h following intraperitoneal and intracerebral injection of [2-14C]sodium acetate, [U-14C]glucose and [2-14C]mevalonic acid respectively. The total quantity of labelled isoprenoids in the brain was, except for glucose, greater when the precursor was administered intracerebrally. The intraperitoneal route was more advantageous in the case of [U-14C]glucose. The subcellular distribution of both labelled total isoprenoid material and sterol was distinct for each labelled precursor. Intracerebrally injected [U-14C]glucose at both time periods studied suggested no dominance of labelling in any fraction. After intraperitoneal injection of [U-14C]glucose the microsomes were more prominently labelled. Both methods of administration of sodium [2-14C]acetate resulted in heavy labelling of the myelin fraction after 24 h. The total labelled isoprenoids resided mainly in the microsomes 24 h after injection of [2-14C]mevalonic acid. Labelled sterol was found to be localized more in the myelin and microsomal fractions for all three precursors than was the labelled total isoprenoids. Depending on the type of experiment to be conducted, each of these precursors can give different results, which must be interpreted accordingly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1975.tb07636.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    RATE OF STEROL FORMATION BY RAT BRAIN GLIA AND NEURONS IN VITRO AND IN VIVO (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 24 (1975), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The ability of 11-day-old rat glial and neuronal cells to biosynthesize sterol was studied as a function of time in vivo and in vitro. The in vitro experiments utilized [2-14C]mevalonic acid as precursor. Glial-enriched cell preparations demonstrated a greater ability to incorporate [2-14C]mevalonic acid into isoprenoid material than did neuronal-enriched preparations. Approximately 4 h were required for maximal uptake of labelled mevalonate by the glial preparations. Further metabolism of the isoprenoid material, involving squalene turnover and sterol demethylation, was still evident even after 15 h of incubation. In vivo, sterol biosynthesis was studied by intraperitoneal injection of sodium [2-14C]acetate and [U-14C]glucose, sacrifice of the animals at 2 or 24 h, subsequent isolation of glial- and neuronal-cell enriched fractions and analysis of labelled isoprenoid material. Glial-enriched fractions again contained the bulk of the labelled isoprenoid material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1975.tb07637.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    THE BIOSYNTHESIS OF CHOLESTEROL AND OTHER STEROLS BY BRAIN TISSUE (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 19 (1972), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— The distribution of [14C]-labeIled material into subcellular fractions of 15-day-old rat brain was studied as a function of time after intracerebral injection of [2-14C]mevalonic acid. As previously shown for adult brain, the data indicated the microsomal fraction to be the site of sterol biosynthesis. The synaptosomal fraction exhibited a marked early uptake of [14C]-nonsaponifiable material. Total radioactivity in both myelin and myelin-like fractions remained low in comparison to that in the other subcellular fractions at all time periods examined. At 2 h after injection, labelled digitonin-precipitable material was demonstrable in all subcellular fractions. Examination of the [14C]-labelled nonsaponifiable material by thin-layer chromatography indicated the rapid appearance of labelled 4-desmethyl sterol in all subcellular fractions, with the most rapid appearance in the myelin fraction, followed in decreasing order by microsomal, synaptosomal, and mitochondrial fractions. Examination of [14C] digitonin-precipitable material from each fraction by the dibromide method demonstrated that although 4-desmethyl sterol appeared quickly, the formation of cholesterol was slow in all fractions, an effect that had been reported earlier for adult brain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1972.tb01258.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    THE BIOSYNTHESIS OF CHOLESTEROL AND OTHER STEROLS BY BRAIN TISSUE (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 19 (1972), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— The distribution of [14C]labelled material into subcellular fractions of 30-day-old rat brain was studied as a function of time, following intracerebral injection of [2-14C] mevalonic acid. As in the adult and 15-day-old brain, the microsomal fraction was indicated as the site of sterol synthesis. Unlike the 15-day-old animal, the myelin fraction from the 30-day-old rat was the predominately labelled fraction at 2 weeks after injection of the animal. Significant amounts of [14C]cholesterol were not present until about 4 h after injection. In order to ascertain whether different populations of cholesterol were being labelled, depending on the age of the animal injected, we compared the labelling of myelin and non-myelin components in animals injected at 15 or at 30 days of age, and sacrificed, respectively, from 14 to 29 days or from 1 to 28 days after injection. Our results indicated that there was an apparent shift of labelled sterol from non-myelin to myelin fractions at about 37–44 days of age.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1972.tb01414.x
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    THE BIOSYNTHESIS OF CHOLESTEROL AND OTHER STEROLS BY BRAIN TISSUE (1971)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 18 (1971), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— The distribution of 14C into several subcellular fractions of adult rat brain was studied as a function of time, following intracerebral injection of [2-14C]mevalonic acid. As expected from previous studies, the microsomal fraction was indicated as the site of sterol biosynthesis. The myelin fraction showed a marked and early uptake of I4C-labelled, digitonin-precipitable material. This was assumed to be a non-enzymic uptake of sterol intermediates. The mitochondrial fraction exhibited a rapid uptake of 14C-labelled, nonsaponifiable material, but a very slow accumulation of 14C-labelled, digitonin-precipitable product. Examination of the nonsaponifiable 14C-fractions by TLC showed a rapid appearance of labelled 4-desmethyl sterols in the microsomal fraction. The myelin fraction selectively retained 4,4′-dimethyl sterol but seemed to release this with time, possibly to be further metabolized by the microsomes. Examination of [14C]digitonin-precipitable material by the dibromide method showed that although labelled 4-desmethyl sterol appeared quite early, cholesterol itself was formed slowly in all fractions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1971.tb00011.x
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    VORTEX MOTION IN LOW-SPEED AERODYNAMICS (1968)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 154 (1968), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1968.tb15228.x
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Interruption and evaporation effects for the reaction of atomic hydrogen with solid olefins at 77.deg.K (1968)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 72 (1968), S. 3689-3692 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100856a064
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Mechanism of Oxidative Amine Dealkylation of Substituted N,N-Dimethylanilines by Cytochrome P-450: Application of Isotope Effect Profiles (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 3657-3664 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00118a001
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