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  • 1
    Electronic Resource
    Electronic Resource
    Electron-Irradiaton Induced Defects in Fe-Doped Semi-Insulating InP (1995)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 196-201 (Nov. 1995), p. 1443-1448 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/01/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.196-201.1443.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Voltage-dependent K channels in protoplasts of trap-lobe cells ofDionaea muscipula (1987)
    Springer
    The journal of membrane biology 100 (1987), S. 73-81 
    Details
    ISSN: 1432-1424
    Keywords: Venus's-flytrap ; protoplast ; K+ current ; rectification ; single channel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary The outward rectification of the K+ current in mesophyll cell protoplasts from trap-lobes ofDionaea muscipula was studied with the patch-clamp technique. The rectification had instantaneous and time-dependent components. Changes in [K+] i strongly affected the conductance voltage relation of the plasma membrane while changes in [K+] o had little effect on the relation. Thus, the outward rectification depends on the membrane voltage and the concentration of intracellular K+. Corresponding single-channel activities were observed both in the intact membrane (cell-attached recording) and in excised patches. The single-channel conductance was about 3.3 pS with symmetrical solutions containing 30mm K+.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02209142
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of severe hemodilution on brain function and brain oxidative metabolism in the cat (1996)
    Springer
    Intensive care medicine 22 (1996), S. 47-51 
    Details
    ISSN: 1432-1238
    Keywords: Isovolemic hemodilution ; Brain tissue ATP ; Brain tissue pH ; Brain tissue lactate ; Cats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective It has been established that during constant presure arterio-venous bypass perfusion, brain metabolism gradually deteriorates in parallel with the declining hematocrit. However, whether this is due to a disturbance of flow regulation or to the decline in the oxygen-carrying capacity of the blood has not been documented. Therefore, intact animals were submitted to severe hemodilution to determine the threshold for the beginning of functional and biochemical impairment of the brain. Methods Six anesthetized and paralyzed adult mongrel cats were submitted to gradual isovolemic hemodilution by stepwise exchange of blood with Ringer lactate/dextran (1∶1) solution. Exchange of 80 ml/kg body weight resulted in a final hematocrit level ranging from 6.1% to 11%. Results Cerebral blood flow gradually increased during hemodilution, with a sharp rise to eight times the prehemodilution value when the hematocrit fell below 10%. The calculated oxygen delivery to the brain remained relatively unchanged. Hemodilution did not cause suppression of spontaneous ECoG or somatically evoked primary cortical potentials, even at the lowest hematocrit value of 6.1%. Brain tissue ATP and phosphocreatine content were largely maintained, although tissue lactate content was elevated (9.54±5.99 μmol/g). Conclusions The hemodynamically unimpaired healthy mammal is able to support a substantial degree of hemodilution without major functional or biochemical disturbance to the brain. The previously observed disturbances during prolonged bypass perfusion are, therefore, most probably due to the associated abnormalities of flow regulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01728330
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of extracorporeal life support on cerebral blood flow, metabolism and electrophysiology in normothermic cats (1995)
    Springer
    Intensive care medicine 21 (1995), S. 38-44 
    Details
    ISSN: 1432-1238
    Keywords: Cardiopulmonary bypass ; Extracorporeal circulation ; Cerebrovascular circulation ; Energy metabolism ; Electroencephalogram ; Evoked potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective Recently, extracorporeal life support (ECLS) by venoarterial bypass perfusion has been recommended for the treatment of refractory respiratory and/or cardiac failure but the safety of this application for the brain is not yet established. Therefore, the effects of normothermic ECLS on cerebral blood flow, metabolism and electrophysiology were studied in cats with total arrest of cardiopulmonary circulation. Design An extracorporeal circulation (ECC) system, consisting of a roller pump, a membrane oxygenator and a heat exchanger, was connected to the circulation of cat by cannulae inserted via the jugular vein and femoral vessels. After 2 h ECLS brains were frozen in situ and investigated for changes in regional metabolism. Measurements and results During 2 h ECC hematocrit declined from 37±7% to 21±10% (means±SD,p〈0.05), cerebral blood flow decreased to 73±14% of control (p〈0.05) and cerebral oxygen delivery to 46±13% of control (p〈0.05) although arterial blood pressure and bypass flow rate did not change. Plasma lactate increased from 0.8±0.3 to 9.2±4.2 μmol/ml (p〈0.05), and brain tissue lactate from 2.3±0.9 to 10.6±2.7 μmol/g (p〈0.05). Hematocrit correlated positively with cerebral oxygen delivery (r=0.86,p〈0.001). Conclusions These data demonstrate that ECLS is associated with reduced cerebral oxygen delivery and may cause brain hypoxia despite normal blood pressure. This complication may contribute to the high incidence of neurological disturbances after prolonged ECLS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02425152
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  • 5
    Electronic Resource
    Electronic Resource
    Morphology and magnetic properties of ultrafine ZnFe2O4 particles (1990)
    Springer
    Applied physics 50 (1990), S. 13-16 
    Details
    ISSN: 1432-0630
    Keywords: 75.50.-y ; 76.80.+y ; 61.50.-f
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Well-crystallized ultrafine ZnFe2O4 particles of several nanometers in size have been prepared by the coprecipitation method, and their particle morphology and magnetic properties, especially at low temperatures, examined. Room-temperature X-ray diffraction, transmission electron microscopy, magnetization measurements at various temperatures from 300 K to 4.2 K, and Mössbauer spectroscopy at various temperatures from 300 K to 4.2 K, and at 4.2 K with a longitudinal magnetic field of 16.4 kOe applied have been employed. The formation of short-range and long-range magnetic order in small ZnFe2O4 particles above and below approximately 30 K is discussed. Below 30 K, the appearance of spontaneous magnetization and its hysteretic property is confirmed for small ZnFe2O4 particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00323947
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  • 6
    Electronic Resource
    Electronic Resource
    X-ray scattering factor of a hydrogen atom in a hydrogen molecule (1963)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 16 (1963), S. 1061-1062 
    Details
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0365110X63002784
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  • 7
    Electronic Resource
    Electronic Resource
    Increase of the He^+ 468.6 nm emission from a hollow cathode discharge by restricting the inner cathode wall
    Amsterdam : Elsevier
    Physics Letters A 85 (1981), S. 436-438 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(81)90432-1
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  • 8
    Electronic Resource
    Electronic Resource
    A specialized transducing phage constructed from Bacillus subtilis phage φ105
    Amsterdam : Elsevier
    Gene 9 (1980), S. 115-126 
    Details
    ISSN: 0378-1119
    Keywords: Recombinant DNA ; cleavage map ; electron microscopy of heteroduplexes ; phage vector ; restriction endonucleases
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-1119(80)90170-5
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  • 9
    Electronic Resource
    Electronic Resource
    A method for preservation of bacteria and bacteriophages by drying in vacuo
    Amsterdam : Elsevier
    Cryobiology 10 (1973), S. 379-385 
    Details
    ISSN: 0011-2240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0011-2240(73)90062-X
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  • 10
    Electronic Resource
    Electronic Resource
    Mutational problem in preservation of bacteria (Escherichia coli) by L-drying
    Amsterdam : Elsevier
    Cryobiology 15 (1978), S. 692-693 
    Details
    ISSN: 0011-2240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0011-2240(78)90132-3
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