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Unified Local Magnitude Scale for Earthquakes of South Balkan Area (2000)

Baba, A. B. ; Papadimitriou, E. E. ; Papazachos, B. C. ; [et al.]

Springer

Pure and applied geophysics 157 (2000), S. 765-783

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ISSN: 1420-9136

Keywords: Key Words: Local magnitudes, south Balkan area, b-value.

Source: Springer Online Journal Archives 1860-2000

Topics: Geosciences , Physics

Notes: Abstract —A homogeneous earthquake catalog spanning 1964–1995 for the southern Balkan area is presented, by expressing the size of the earthquakes in a unified local magnitude scale. The strategy followed to produce this catalog is also presented. Local magnitudes calculated by six Balkan seismological centers (ATH, THE, ISK, TIR, TTG, SKO) have been used in order to obtain relations between the estimated M L values from the Greek seismological centers (ATH and THE) and the remaining four Balkan stations. Since it was found that local magnitudes estimated by ATH and THE are almost identical, they have been used as one data set so as to correlate with the data of each one of the remaining four seismological stations. Based on the proposed relations, a unified local magnitude, M LGR, is given for each earthquake of the regional catalog. A published scaling relation between the M L values from ATH and THE networks and the corresponding seismic moment magnitude, M w , was used in combination with the above relations, in order to enable the conversion of any M L value from any station into M w . The catalog completeness has been checked and the b-value has been calculated for the complete data sample.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/PL00001117

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Selective reduction by isolation rearing of 5-HT1A receptor-mediated dopamine release in vivo in the frontal cortex of mice (2002)

Ago, Y. ; Sakaue, M. ; Baba, A. ; [et al.]

Oxford, UK : Blackwell Science Ltd

Journal of neurochemistry 83 (2002), S. 0

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ISSN: 1471-4159

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Medicine

Notes: Serotonin (5-HT)1A receptors modulate in vivo release of brain monoaminergic neurotransmitters which may be involved in isolation-induced aggressive behavior. The present study examined the effect of isolation rearing on the 5-HT1A receptor-mediated modulation of dopamine (DA), 5-HT and noradrenaline (NA) release in the frontal cortex of mice. The selective 5-HT1A receptor agonist (S)-5-{3-[(1,4-benzodioxan-2-ylmethyl)amino]propoxy}-1,3-benzodioxole HCl (MKC-242) increased the release of DA and NA and decreased the release of 5-HT in the frontal cortex of mice. The effect of MKC-242 on DA release was significantly less in isolation-reared mice than in group-reared mice, while effects of the drug on NA and 5-HT release did not differ between both groups. The effect of the other 5-HT1A receptor agonist 8-hydroxy-2-(di-n-propylamino)tetralin on cortical DA release was also less in isolation-reared mice than in group-reared mice, and that of the drug on cortical 5-HT release did not differ between both groups. In contrast to MKC-242-induced DA release, amphetamine-induced increase in cortical DA release in vivo was greater in isolation-reared mice. The present findings suggest that isolation rearing enhances the activity of cortical dopaminergic neurons and reduces selectively the 5-HT1A receptor-mediated release of DA in the cortex.