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  • 1
    Electronic Resource
    Electronic Resource
    Hysteretic behavior of magnetic particles with dipole interaction (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5558-5560 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Energy barrier height and coercivity variation of a pair of interacting particles has been studied as a function of the bonding angle β for 0°≤β≤π/2 and applied field using the fixed step Monte Carlo simulation approach supplemented by the perturbation method. Coercivity Hc(β) of the system has local maxima at β=0 and π/2, and a global minimum at β(similar, equals)65°, and remains depressed compared to the noninteracting case for β≤30° at any temperature. The barrier height behaves similarly. Due to the random nature of distribution dipole interaction, on average, leads naturally to a reduction in coercivity and energy barrier height in comparison with the noninteracting case. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.369894
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of biquadratic exchange coupling on magnetoresistance and magnetization process in magnetic bilayer systems (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 4430-4432 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An improved model is proposed to deal with the magnetic bilayer systems taking into account the contribution of the anisotropy energy and biquadratic exchange coupling to elaborate on the evolution of the magnetoresistance (MR) ratio and magnetization process. The results indicate that the characteristic behavior of the MR ratio depends distinctly on both the biquadratic coupling constant and the layer thickness. The profile of the MR ratio was found to vary from an inverted bell shape to a concave pyramid with increasing biquadratic coupling strength, and decays sharply with the layer thickness. This model calculation helps us to provide a venue for further understanding the MR or giant magnetoresistance behavior of the magnetic multilayer system. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370364
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  • 3
    Electronic Resource
    Electronic Resource
    Identification of sporadic mutations in the helix initiation motif of keratin 6 in two pachyonychia congenita patients: further evidence for a mutational hot spot (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Experimental dermatology 8 (1999), S. 0 
    Details
    ISSN: 1600-0625
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Pachyonychia congenita (PC) is a rare, autosomal dominant, ectodermal dysplasia characterized most distinctly by the presence of symmetric nail hypertrophy. In the Jadassohn-Lewandowsky form, or PC-1, additional cutaneous manifestations may include palmoplantar hyperkeratosis, hyperhidrosis, follicular keratoses, and oral leukoker-atosis. Mutations have previously been identified in the 1A helix initiation motif of either keratin 6 or keratin 16 in patients with PC-1. In the current study, we have identified 2 sporadic, heterozygous mutations in the 1A helix region of the K6 isoform (K6a). The first mutation identified was a 3 base pair deletion (K6aΔ N171). The second mutation was a C-to-A transversion resulting in an amino acid substitution (K6a N171K). These data, in combination with previous reports, provide further evidence that this location is a mutational hot spot.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0625.1999.tb00357.x
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  • 4
    Electronic Resource
    Electronic Resource
    Serotoninergic mechanisms of beta-endorphin-induced hypothermia in rats (1979)
    Springer
    Pflügers Archiv 382 (1979), S. 87-90 
    Details
    ISSN: 1432-2013
    Keywords: Temperature regulation ; Beta-endorphin ; Hypothermia ; Serotonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of intraventricular administration of beta-endorphin on thermoregulatory responses of unanesthetized rats to different ambient temperatures (T a ) of 8, 22 and 30°C were assessed. Administration of beta-endorphin produced a fall in rectal temperature at bothT a 8 and 22°C. The hypothermia in response to beta-endorphin was brought about by both cutaneous vasodilation (as indicated by an increase in both the tail and the foot skin temperatures) and decreases in metabolic heat production. However, atT a 30°C, administration of beta-endorphin produced no change in rectal temperature or other thermoregulatory responses. Furthermore, the hypothermic effect induced by beta-endorphin was greatly attenuated by either the depletion of brain serotonin levels (with 5,6-dihydroxytryptamine andp-chlorophenylanine) or the blockade of opiate receptors (with naloxone). The data indicate that beta-endorphin leads to hypothermia in rats by increasing sensible heat loss and decreasing metabolic heat production, probably via the release of endogenous serotonin within brain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00585909
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of sodium acetylsalicylate on thermoregulatory responses of rats to different ambient temperatures (1978)
    Springer
    Pflügers Archiv 378 (1978), S. 181-184 
    Details
    ISSN: 1432-2013
    Keywords: Temperature regulation ; Antipyretics ; Hypothermia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of intraperitoneal administration of sodium acetylsalicylate (aspirin) on thermoregulatory responses (Ta) of 15, 22 and 29°C were assessed. Intraperitoneal administration of aspirin produced dose-dependent hypothermia at both 15 and 22°C. The hypothermia was brought about by cutaneous vasodilation (as indicated by an increase of the tail and foot skin temperatures). However, in the heat (29°C), i. p. administration of the same amount of aspirin produced no change in rectal temperature, since the thermoregulatory responses were unaffected by aspirin application at this Ta. Thus it appears that aspirin increases heat loss and leads to hypothermia in rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00584454
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  • 6
    Electronic Resource
    Electronic Resource
    Haloperidol produces hypothermic effects in rats (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 1469-1470 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Intraperitoneal administration of either haloperidol or chlorpromazine produced hypothermia both in the cold (8° C) and at room temperature (22°C). The hypothermia was brought about both by a decrease in metabolic heat production and an increase in the cutaneous temperature of tail and foot skin. However, at a higher temperature (29°C), there were no changes in rectal temperature and other thermoregulatory responses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01962790
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of brain monoamine depletion on thermoregulation, active avoidance, and food and water intake in rats (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 756-757 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Intraventricular administration of 6-OHDA or 5,6-DHT suppressed food intake, whereas their effect on active avoidance produced a suppression with the former and an enhancement with the latter. The increased water intake was specifically associated with 5,6-DHT treatment in rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01947306
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of hypothalamic injections of 5,6-dihydroxytryptamine on thermoregulation in rats (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 359-361 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 5,6-Dihydroxytryptamine, a serotonin depletor, infused directly into the anterior hypothalamus of rat's brain, produced an increase in both heat production and heat loss (as indicated by changes in peripheral circulation) at temperatures of 8, 15 and 22°C. The rectal temperature of these treated rats remained constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01964352
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  • 9
    Electronic Resource
    Electronic Resource
    Suppression of natural killer cell activity in mouse spleen lymphocytes by several dopamine receptor antagonists (1995)
    Springer
    Cellular and molecular life sciences 51 (1995), S. 343-348 
    Details
    ISSN: 1420-9071
    Keywords: Dopamine ; neuroleptics ; natural killer cell ; spleen lymphocytes ; interferon ; interleukin-2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The effects of dopaminergic receptor inhibitors such as thiothixine (D1/D2), fluphenazine (D1/D2), trifluoperazine (D1/D2), pimozide (D2), flupenthixol (D1/D2), (+/−)-SKF 83566 (D1), and spiperone (D2) on splenic natural killer (NK) cell cytotoxic activities were assessed in vitro using mouse spleen lymphocytes or enriched NK cells. Both the activities of the splenic NK cell cytotoxicity and the effector-target cell conjugation were suppressed by thiothixine, fluphenazine, and trifluoperazine at concentrations from 2.64 to 14.78 μM. In addition, the augmentation of the cytolytic activity of NK cells induced by interferon-α or interleukin-2 was antagonized by pretreatment with these neuroleptic compounds. However, neither the splenic NK cell cytotoxicity nor the effector-target cell conjugation were affected by treatment with other neuroleptic compounds such as pimozide, flupenthixol, (+/−)-SKF 83566, and spiperone. Thus, it appears that neuroleptic compounds such as thiothixine, fluphenazine, and trifluoperazine may act through the mechanisms other than a dopaminergic pathway to affect the NK cell-target cell interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01928892
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of three inhibitors of nitric oxide synthase on host resistance to bacterial infection (1996)
    Springer
    Inflammation research 45 (1996), S. 109-112 
    Details
    ISSN: 1420-908X
    Keywords: NG-nitro-L-arginine-methyl-ester (L-NAME) ; NG-monomethyl-L-arginine (L-NMMA) ; N-iminoethyl-L-ornithine (L-NIO) ; Septic shock ; Survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To examine the effects of three nitric oxide synthase inhibitors on survival in a murine sepsis model.Design: Prospective randomized experimental trials.Setting: Laboratory.Subjects: Female Balb/c mice.Interventions:Escherichia coli (108 colony-formingunits/body) were injected into the peritoneal cavities of Balb/c mice. NG-nitro-L-arginine-methyl-ester, NG-monomethyl-L-arginine, or N-iminoethyl-L-ornithine was given at various concentrations, intraperitoneally, one hour before bacterial challenge.Measurements: One hundred and fifteen animals were observed for survival.Results: These inhibitors provided the mice no protection from the bacterial challenge. Notably, pretreatment with NG-nitro-L-arginine-methyl-ester (100 mg/kg i.p.) actually reduced survival time afterE. coli challenge.Conclusions: Inhibition of nitric oxide production improved neither the survival time nor rate in this murine sepsis model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265161
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