Abstract:
:Sprague-Dawley male rats, maintained in a 14:10 h light:dark cycle were exposed for 30 days (starting at 56 days of age) to a 65 kV/m, 60 Hz electric field or to a sham field for 20 h/day beginning at dark onset. Pineal N-acetyltransferase (NAT), hydroxy-indole-o-methyl transferase (HIOMT), and melatonin as well as serum melatonin were assayed. Preliminary data on unexposed animals indicated that samples obtained 4 h into the dark period would reveal either a phase delay or depression in circadian melatonin synthesis and secretion. Exposure to electric fields for 30 days did not alter the expected nighttime increase in pineal NAT, HIOMT, or melatonin. Serum melatonin levels were also increased at night, but the electric field-exposed animals had lower levels than the sham-exposed animals. Concurrent exposure to red light and the electric field or exposure to the electric field at a different time of the day-night period did not reduce melatonin synthesis. These data do not support the hypothesis that chronic electric field exposure reduces pineal melatonin synthesis in young adult male rats. However, serum melatonin levels were reduced by electric field exposure, suggesting the possibility that degradation or tissue uptake of melatonin is stimulated by exposure to electric fields.
journal_name
Bioelectromagneticsjournal_title
Bioelectromagneticsauthors
Grota LJ,Reiter RJ,Keng P,Michaelson Sdoi
10.1002/bem.2250150506subject
Has Abstractpub_date
1994-01-01 00:00:00pages
427-37issue
5eissn
0197-8462issn
1521-186Xjournal_volume
15pub_type
杂志文章abstract::The aim of this study was to determine a current density threshold for exciting the motor cortex area of the brain. The current density threshold for excitation of nerve fibres (20 microm in diameter) found in the literature is approximately 1 A/m(2) at frequencies lower than 1 kHz. In consideration of a safety factor...
journal_title:Bioelectromagnetics
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250010203
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journal_title:Bioelectromagnetics
pub_type: 杂志文章,评审
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更新日期:1997-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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更新日期:2007-04-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250050202
更新日期:1984-01-01 00:00:00
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journal_title:Bioelectromagnetics
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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journal_title:Bioelectromagnetics
pub_type: 信件
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更新日期:2015-04-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.22107
更新日期:2018-05-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.10023
更新日期:2002-05-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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更新日期:2008-10-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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更新日期:2013-07-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.21819
更新日期:2014-02-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:
更新日期:1999-10-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250020310
更新日期:1981-01-01 00:00:00
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journal_title:Bioelectromagnetics
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更新日期:2009-10-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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更新日期:2005-05-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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更新日期:2016-02-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
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更新日期:1988-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250050212
更新日期:1984-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20145
更新日期:2005-12-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:
更新日期:1999-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/(sici)1521-186x(200004)21:3<197::aid-bem7>
更新日期:2000-04-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20568
更新日期:2010-07-01 00:00:00