Results 131 to 140 of about 516,815 (304)

The influence of season, photoperiod, and pineal melatonin on immune function. [PDF]

open access: yes, 1995
In addition to the well-documented seasonal cycles of mating and birth, there are also significant seasonal cycles of illness and death among many animal populations.
Demas, G   +3 more
core   +1 more source

Microstructure and morphoquantitative study of pineal gland in santa ines sheep [PDF]

open access: yes, 2011
O presente estudo avaliou os aspectos morfoquantitativos e qualitativos da glândula pineal em fêmeas de ovinos da raça Santa Inês em atividade reprodutiva e anestro fisiológico. Foram utilizados sete ovinos, fêmeas e adultas, coletados em frigoríficos da
Benedicto, Hildebrando Gomes   +5 more
core  

A brief review about melatonin, a pineal hormone

open access: yesArchives of Endocrinology and Metabolism, 2018
Melatonin is a ubiquitous molecule in nature, being locally synthesized in several cells and tissues, besides being a hormone that is centrally produced in the pineal gland of vertebrates, particularly in mammals.
F. G. do Amaral, J. Cipolla-Neto
semanticscholar   +1 more source

Photoperiodism as a Modifier of Effect of Extremely Low-Frequency Electromagnetic Field on Morphological Properties of Pineal Gland

open access: yesBiomolecules & Biomedicine, 2006
The aim of our study was to determine, using histological and stereological methods, whether photoperiodism has any impact on the effects that chronic (three-month long) exposure to LF-EMF (50Hz) has on morphological characteristics on rat's pineal ...
Tamara Lukač   +4 more
doaj   +1 more source

Molecular rhythms in the pineal gland

open access: yesCurrent Opinion in Neurobiology, 1998
Recent findings have clarified the mechanisms regulating the night- and pineal-specific transcription of serotonin N-acetyltransferase, the rate-limiting enzyme in melatonin formation. Norepinephrine, acting via beta-adrenoceptors and cAMP at night, stimulates the cAMP response element binding protein, which turns on the transcription of N ...
Solomon H. Snyder   +2 more
openaire   +3 more sources

Systematic identification of rhythmic genes reveals camk1gb as a new element in the circadian clockwork.

open access: yesPLoS Genetics, 2012
A wide variety of biochemical, physiological, and molecular processes are known to have daily rhythms driven by an endogenous circadian clock. While extensive research has greatly improved our understanding of the molecular mechanisms that constitute the
Adi Tovin   +12 more
doaj   +1 more source

The role of melatonin and the pineal gland in the photoperiodic control of reproduction and smoltification in Salmonid fish [PDF]

open access: yes, 1996
The timing of seasonal events in salmonids is thought to be controlled by endogenous circannual rhythm(s) which are entrained by the seasonally-changing daylength.
Porter, Mark
core  

MORPHO-FUNCTIONAL CHARACTERISTICS OF THE PINEAL GLAND AT THE SIMULATION LAUNDRY LIGHTING COVERAGE AND ACUTE STRESS

open access: yesКубанский научный медицинский вестник, 2014
Conduct a study on the morpho-functional features of the pineal gland at the simulation laundry lighting and acute stress. It was determined that in the peripheral regions of the pineal gland conditions develop functional activity, as indicated by ...
V. V. Pshychenko
doaj  

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