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  • 1
    Electronic Resource
    Electronic Resource
    Serumenzymspiegel alkalischer Dünndarmphosphatasen bei der Hyperthyreose (1973)
    Springer
    Journal of molecular medicine 51 (1973), S. 143-144 
    Details
    ISSN: 1432-1440
    Keywords: Intestinal alkaline phosphatase ; bone alkaline phosphatase ; hyperthyroidism ; Alkalische Dünndarmphosphatasen ; alkalische Knochenphosphatasen ; Hyperthyreose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Parallel zu tierexperimentellen Befunden, daß Thyroxingaben zu einer erhöhten Enzymkonzentration alkalischer Phosphatasen im Dünndarmgewebe führen, konnte im Serum von 50 hyperthyreoten Patienten eine Vermehrung intestinaler alkalischer Phosphatasen nachgewiesen werden. Damit tragen neben der deutlichen Zunahme von Isoenzymen ossären Ursprungs als Folge reaktiv gesteigerter Osteoblastentätigkeit auch intestinale alkalische Phosphatasen zu der bei einer Hyperthyreose häufig zu findenden Erhöhung der Serumgesamtaktivität bei. Die angeführten Befunde sollten daher für die differentialdiagnostische Wertung des klinisch-chemischen Parameters „Gesamtaktivität der alkalischen Phosphatase im Serum“ bei der Hyperthyreose berücksichtigt werden.
    Notes: Summary According to experimental results showing increased alkaline phosphatase concentrations in the small intestine of hyperthyroid rats, elevated intestinal alkaline phosphatase serum levels were observed in hyperthyroid patients with normal liver function. Therefore, an elevation of total serum alkaline phosphatase activity in hyperthyroidism is not only due to the main increase of bone phosphatase activity but also to an increase of intestinal alkaline phosphatase activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01483925
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  • 2
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    Die marxistisch-leninistische Wissenschaftstheorie benötigt ein interdisziplinäres Forschungskonzept (1973)
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 21:9 (1973) 1080 
    Details
    ISSN: 0012-1045
    Topics: Philosophy
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4085-1973-021-09-000006
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  • 3
    Electronic Resource
    Electronic Resource
    EVIDENCE FOR SEPARATE SYSTEMS FOR THE TRANSPORT OF NEUTRAL AND BASIC AMINO ACIDS ACROSS THE BLOOD-BRAIN BARRIER (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 effects of high circulating concentrations of several amino acids on the free amino acids of rat brain were measured, to see whether or not the results followed any consistent pattern. High circulating concentrations of large, neutral amino acids (phenylalanine, valine or isoleucine) caused significantly decreased values only of other large, neutral amino acids in the brains. High circulating concentrations of the basic amino acids lysine or arginine caused significantly decreased values only of each other. The data suggest that there are separate systems for the transport of neutral and basic amino acids across the blood-brain barrier. The effects of valine and lysine on the uptake by brain and the con-vulsant action of allylglycine (a neutral amino acid) were consistent with the concept of separate systems for the transport of amino acids across the blood-brain barrier. Valine inhibited the uptake by brain and the convulsant action of allylglycine in mice, but lysine did not. The data suggest that allylglycine and valine are transported into the brain by a common mechanism that does not transport lysine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1971.tb11991.x
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  • 4
    Electronic Resource
    Electronic Resource
    THE SUBCELLULAR LOCATION OF THE HIGHER ACETYLCHOLINE CONTENT IN RAT BRAIN FOUND AFTER KILLING BY THE NEAR-FREEZING METHOD AS COMPARED WITH DECAPITATION (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 23 (1974), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— We have confirmed the finding of Takahashi & Aprison (J. Neurochem.11, 887-898, 1964) that more acetylcholine is found in brains of rats killed by near-freezing compared to decapitation. The radioenzymic assays for acetylcholine and choline of Shea & Aprison (Analyt. Biochem.56, 165-177, 1973) and Goldberg & McCaman (J- Neurochem.20, 1 8, 1973) were used to measure both compounds and gave very similar results. The larger amount of ACh was observed both in powders of frozen rat brain and in homogenates prepared from animals killed by near-freezing. When subcellular fractionation of the homogenates was done in the presence of eserine, the larger amount of ACh was found in the soluble fraction (S2). These results indicated that with the near-freezing method, an extra amount of ACh is preserved in a form that is originally protected from acetylcholinesterase but that becomes esterase-sensitive on fractionation since no differences were observed in P1. P2 or S2 fractions when no eserine was present. The amounts of choline in homogenates and subcellular fractions were also measured after both methods of killing. Differences in the method of killing and postmortem changes which affect the choline values obtained are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1974.tb12221.x
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  • 5
    Electronic Resource
    Electronic Resource
    Viskosimeter für sehr geringe Flüssigkeitsmengen (1970)
    Springer
    Rheologica acta 9 (1970), S. 550-553 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Summary A viscometer for fluid quantities of less than 10 mm3 is described. For the measurements the fluid is brought between two transducers of PZT facing each other at a short distance. One transducer compresses the liquid layer periodically at a frequency of 30 Hz and thus enforces a predominantly radial alternating flow. The second transducer records the pressure within the film which is a measure of its viscosity.
    Notes: Zusammenfassung Es wird ein Viskosimeter für Flüssigkeitsmengen von weniger als 10 mm3 beschrieben. Zur Messung wird die Flüssigkeit zwischen zwei sich in geringem Abstand parallel gegenüberstehende Bleizirkontitanatwandler gebracht. Durch den einen Wandler wird die Flüssigkeitsschicht bei einer Frequenz von 30 Hz periodisch zusammengedrückt und damit eine überwiegend radiale Wechselströmung erzwungen. Der zweite Wandler mißt den Druck in der Schicht, der ein Maß für die Viskosität ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01985466
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of wind shear on atmospheric wave instabilities revealed by FM/CW radar observations (1973)
    Springer
    Boundary layer meteorology 4 (1973), S. 113-131 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract An FM/CW radar sounding system designed and built by one of us (Richter, 1969) reveals atmospheric wave structure in unparalleled detail. The most outstanding features evident in the record are; internal gravity waves; features resembling Kelvin/Helmholtz instability structures; and multiple layering, often with lamina only a few meters thick. This paper shows a variety of atmospheric structural patterns and compares them with several hypothetical models of internal waves to obtain more insight into the atmospheric processes at work. Special attention is given to the distribution of the Richardson number in trapped and untrapped gravity waves. It is proposed that the multiple layers result from untrapped internal gravity waves whose propagation vector is directed nearly vertically within very stable height regions. It is argued that the layers are caused by dynamic instability resulting from reduction in the Richardson number due to wave induced shear and to some background wind shear when the amplitude-to-wavelength ratio grows during propagation into thermally stable height regions of the atmosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265227
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  • 7
    Electronic Resource
    Electronic Resource
    New developments in FM-CW radar sounding (1973)
    Springer
    Boundary layer meteorology 4 (1973), S. 179-199 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Simultaneous lidar and FM-CW (frequency modulated-continuous wave) radar observations are presented and both common and different features observed with the two remote sensors are described. Among the common features are Kelvin-Helmholtz (K-H) waves and turbulent structures. The potential of the FM-CW radar as a meteorological tool for aiding fog dissipation forecasts is illustrated. The data also indicate that the radar often detects echoes from height regions which coincide with cloud tops. A new FM-CW radar sounder is described which incorporates scanning capability and which is fully mobile. Examples of recent observations are presented illustrating the capabilities of this second generation radar sounder. Future applications of the FM-CW radar sounder, such as investigations of the exact nature of the mechanism responsible for the radar returns, require accurate calibration of the radar sounder. It is shown that resolution and sensitivity of a linear frequency-modulated FM-CW radar depend on the time delay of the signal. Range dependency on resolution and sensitivity is calculated for various periodic and stochastic perturbations in a linear modulation and good agreement is found between calculated and measured values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265231
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  • 8
    Electronic Resource
    Electronic Resource
    Remote sensing of the ocean (1973)
    Springer
    Boundary layer meteorology 5 (1973), S. 201-209 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02188320
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  • 9
    Electronic Resource
    Electronic Resource
    Some observations on the mechanism of action of retarders in rubber vulcanization. A new class of retarder (1972)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 16 (1972), S. 2647-2655 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Attempts have been made to demonstrate the involvement of free radicals in the benzthiazolesulfenamide-accelerated vulcanization of natural rubber. Free radicals were only detected by ESR in reaction mixtures containing the retarder N-nitrosodiphenylamine (NDPA). In addition, NDPA was the only compound found, from the vulcanization accelerator and retarders tested, to affect the free-radical polymerization of methyl methacrylate. A purely ionic mechanism for sulfur vulcanization of natural rubber accelerated by benzthiazolesulfenamide derivatives has therefore been assumed and used to help in the design of new vulcanization retarders. A new class of retarder has been discovered, consisting of hydrocarbylthio derivatives of trisalkylsulfonyl methane. These retarders are believed to be the first vulcanization retarders to act by cleavage of a carbon-sulfur bond.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1972.070161017
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