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  • 1990-1994  (7)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Membrane-Associated Phospholipase D Activity in Rat Sciatic Nerve (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 57 (1991), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Rat sciatic nerve contains a membrane-bound phospholipase D that catalyzes the hydrolysis of exogenous phosphatidylcholine (PC) to phosphatidic acid (PA) and choline. The enzyme is associated with a particulate fraction consisting primarily of microsomes and myelin. This fraction also contains phosphatidate phosphohydrolase activity leading to the production of diacylglycerols (DAG). The phosphohydrolase activity can be completely inhibited by NaF. Hydrolysis of exogenous PC requires detergent and is linear up to about 40 μg of protein at a pH optimum of 6.5. In the absence of NaF, the sum of PA and DAG increases linearly for 40 min, whereas in its presence, PA production is linear for only 15 min. At optimum conditions, PC hydrolysis proceeds at 15 nmol/h/mg ot protein. Addition of increasing amounts of ethanol to the incubation system leads to the generation of increasing amounts of phosphatidylethanol, indicating transphosphatidylation activity. At an ethanol concentration of 0.4 M, phosphatidylethanol represents about one-half of the reaction products generated at approximately the same rate of enzymic activity observed in the absence of ethanol. Higher ethanol concentrations are inhibitory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1991.tb08310.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    An unusual presentation of cardiac tamponade (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 45 (1990), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A case of pericardial effusion with tamponade that presented as an acute abdomen is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1990.tb14279.x
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A Unified Description of the Kinetics of Hydrate Nucleation, Growth, and Decomposition (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 715 (1994), 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.1749-6632.1994.tb38843.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Gamma-radiolysis of KNO3 in double sulfates in solid state (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 178 (1994), S. 429-436 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Gamma-radiolysis of KNO3 in the matrix of some sulfates, viz. Na2SO4, K2SO4, KNaSO4, KNaSO4: Eu, KNaSO4: Ce, K3Na(SO4)2, K3Na(SO4)2: Eu and K3Na(SO4)2: Ce has been studied at an absorbed dose of 30 kGy.G(NO 2 − ) values calculated on the basis of electron fraction in all the sulfates are enhanced significantly. It is also affected by the nature of outer cation and the dopant lanthanide. Electron spin resonance (ESR) and thermoluminescence (TL) measurements show the formation of radical species SO 4 − , SO 3 − , O 3 − , O 2 − upon γ-irradiation. It is proposed that there radical species may transfer energy and interact with the radical species of nitrate (NO 3 2− , NO2, NO3 etc.) so as to enhance the decomposition. A possible mechanism has been proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039736
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Photochemical reduction of uranyl ion in nitric acid medium using a XeCl excimer laser (1992)
    Springer
    Journal of radioanalytical and nuclear chemistry 165 (1992), S. 255-261 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper describes the results of photoreduction of uranyl (UO2 2+) ion to U4+ in 0.2M HNO3 and ethanol using a 308 nm XeCl excimer laser. The effects of different concentrations of ethanol and the addition of sulfamic acid on the quantum yield for U4+ formation are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164764
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Dose determination by ESR in an accident, using cotton fabric (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 175 (1993), S. 17-24 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Accidental exposure dose assessment by electron spin resonance (ESR) technique from the free radicals generated in a cotton handkerchief has been attempted in this investigation. The cotton handkerchief, a common material carried by individuals, was taken as the medium for free radical estimation. About 55 mg of the irradiated piece of cloth was loaded into a quartz tube and the dose dependence of the ESR signal at g=2.0026 was measured at room temperature, using a Bruker ESP-300 ESR spectrometer in X-band (9.74 GHz). The intensity of this signal was found to be proportional to the dose in the range of 1–1000 Gy. The stability of the free radicals with time of storage was followed. Dependence of dose rate as well as the presence of water on the yield of free radicals were also investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02168363
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Role of radical ions in the thermally stimulated luminescence of uranium doped BaCO3 system (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 187 (1994), S. 123-129 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Electron paramagnetic resonance (EPR) studies of γ-irradiated uranium doped BaCO3 have shown the formation of CO3 −, CO2 −, O3 − and O2 − ions. Thermally stimulated luminescence (TSL) glow curves of the γ-irradiated samples in the 300–600 K range have exhibited an intense peak around 360 K and a weak one around 440 K. The trap parameters for these peaks have been determined from TSL data. Spectral studies of the glow have revealed emission around 566, 583 and 590 nm characteristic of the uranate ion. From studies on the thermal stabilities of the radical ions, it has been inferred that the glow peak around 360 K is associated with the thermal destruction of O2 − ion and the peak around 440 K is associated with the thermal destruction of CO3 − ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02162659
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    Paper (German National Licenses)
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