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  • 1985-1989  (7)
  • 1
    Digitale Medien
    Digitale Medien
    Spatial Learning Potentiates the Stimulation of Phosphoinositide Hydrolysis by Excitatory Amino Acids in Rat Hippocampal Slices (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 51 (1988), S. 0 
    Details
    ISSN: 1471-4159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Abstract: Stimulation of phosphoinositide (PI) hydrolysis by excitatory amino acids (glutamate and ibotenate) or nor-epinephrine was potentiated in hippocampal slices from rats trained in an eight-arm radial maze, used as a test of spatial learning. No difference in basal or carbamylcho-line-stimulated PI hydrolysis was found between control and trained animals. An increased PI response to excitatory amino acids and norepinephrine was not found in hippocampal slices prepared from animals trained in a shock conditioning avoidance test. These results suggest a possible involvement of specific glutamate receptors coupled with PI hydrolysis in the synaptic mechanisms underlying formation and/or storage of spatial memory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1471-4159.1988.tb01804.x
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  • 2
    Digitale Medien
    Digitale Medien
    Behavioral Changes Induced by Neonatal Administration of TRH Antiserum (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 553 (1989), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1989.tb54526.x
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  • 3
    Digitale Medien
    Digitale Medien
    EFFECTS OF OPIATES AND OPIOIDS ON INTRAOCULAR PRESSURE OF RABBITS AND HUMANS (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 12 (1985), S. 0 
    Details
    ISSN: 1440-1681
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: 1. Acute intraocular injection of morphine or D-Ala-met-enkephalinamide (D-Ala-E) in rabbits caused a sustained decrease in intraocular pressure. Conjunctival instillation of naloxone solution prevented the lowering effect of morphine or D-Ala-E on intraocular pressure.2. Aqueous outflow facility appeared to be significantly higher in patients addicted to morphine or heroin than in healthy volunteers. Intraocular pressure was significantly lower in addicted patients than in control subjects. Conjunctival instillation of naloxone solution decreased aqueous outflow facility and increased intraocular pressure in addicted patients.3. Patients with chronic open angle glaucoma showed a significant decrease in intraocular pressure after conjunctival instillation of morphine solution.4. It is concluded that intraocular opiate receptors are involved in the regulation of intraocular pressure in animals and humans.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1440-1681.1985.tb02312.x
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  • 4
    Digitale Medien
    Digitale Medien
    Microwave emission above steady and moving sunspots (1987)
    Springer
    Solar physics 112 (1987), S. 89-105 
    Details
    ISSN: 1573-093X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Two-dimensional maps of radio brightness temperature and polarization, computed assuming thermal emission with free-free and gyroresonance absorption, are compared with observations of active region 2502, performed at Westerbork at λ = 6.16 cm during a period of 3 days in June 1980. The computation is done assuming a homogeneous model in the whole field of view (5′ × 5′) and a force-free extrapolation of the photospheric magnetic field observed at MSFC with a resolution of 2″.34. The mean results are the following: (a) A very good agreement is found above the large leading sunspot of the group, assuming a potential extrapolation of the magnetic field and a constant conductive flux in the transition region ranging from 2 × 106 to 107 erg cm−2s−1. (b) A strong radio source, associated with a new-born moving sunspot, cannot be ascribed to thermal emission. It is suggested that this source may be due to synchrotron radiation by mildly relativistic electrons accelerated by resistive instabilities occurring in the evolving magnetic configuration. An order-of-magnitude computation of the expected number of accelerated particles seems to confirm this hypothesis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00148490
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  • 5
    Digitale Medien
    Digitale Medien
    Ocular instillation of naloxone increases intraocular pressure in morphine-addicted patients: A possible test for detecting misuse of morphine (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 266-267 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Morphine addiction ; naloxone ; conjuctival instillation ; intraocular pressure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The effect of conjunctival instillation of naloxone on intraocular pressure has been examined in morphine-addicted patients as compared to non-addicted healthy volunteers. Morphine-addicted subjects showed a lower basal value of intraocular pressure as compared to the control volunteers. The instillation of naloxone caused a normalization of intraocular pressure to a level similar to that of control volunteers. This test seems to be a useful screening method for detecting morphine addiction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02002629
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  • 6
    Digitale Medien
    Digitale Medien
    Somatic growth in hypophysectomized pituitary-homografted rats is promoted by prolactin (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1442-1444 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Prolactin ; somatic growth ; hypophysectomy ; corticosterone ; pituitary hormones
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Hypophysectomized male rats bearing a homograft of two adenopituitaries under the kidney capsule showed a significant increase in b.wt as compared to hypophysectomized non-homografted animals. Radiommunoassay of growth hormone (GH), ACTH, α-MSH,β-endorphin and prolactin (PRL) revealed that only the latter was highly increased in the plasma of hypophysectomized homografted rats. These animals showed also increased levels of plasma corticosterone. However, daily injection of corticosterone failed to promote somatic growth in hypophysectomized non-homografted rats. These results suggest that PRL, and not other hormonal factors, promotes somatic growth in hypophysectomized homografted rats, and stress the concept that only PRL is secreted in significant amounts by pituitary homografts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01950025
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  • 7
    Digitale Medien
    Digitale Medien
    Unstable chromospheric dark features and type-III bursts association (1986)
    Springer
    Solar physics 103 (1986), S. 235-247 
    Details
    ISSN: 1573-093X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The temporal association between the kinematic parameters of chromospheric dark features (DF) and the production of radio type-III bursts is investigated during a period of five months. The Doppler shifts inside six different DF are measured by means of the Meudon Multichannel Subtracting Double Pass Spectrograph (MSDP) during periods of some minutes around 24 type-III bursts. The position of the radio bursts has been checked to be associated with the same active region observed by MSDP, by using the Nançay Radioheliograph. It appears that 23 out of 24 bursts take place when the DF is totally or predominantly blue-shifted. In 18 out of 21 cases, a maximum of the outward velocity is observed in the optical image closest in time to the radio burst. The following peculiarities are also shown by the analyzed DF: (a) All of them present a lengthened shape, in most cases pointing toward a sunspot: a bright region coinciding with a parasitic polarity is observed in between. (b) Horizontal velocities along the DF major axis are often observed, always in a direction opposite to the sunspots. This association is interpreted by assuming that a shock wave, generated by the moving chromospheric material, is able to accelerate coronal electrons (according to a mechanism proposed by Leroy and Mangeney, 1984) thus producing type-III bursts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00147827
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