scholarly journals Human circadian variations

2021 ◽  
Vol 131 (16) ◽  
Author(s):  
Nicholas W. Gentry ◽  
Liza H. Ashbrook ◽  
Ying-Hui Fu ◽  
Louis J. Ptáček
Keyword(s):  
Circadian Variations

Circulating Activities During Constant Infusion of Heparin or a Low Molecular Weight Derivative (Enoxaparine): Failure to Demonstrate any Circadian Variations

1987 ◽  
Vol 58 (04) ◽  
pp. 1068-1072 ◽  
Author(s):  
P Toulon ◽  
J F Vitoux ◽  
C Leroy ◽  
T Lecomte ◽  
M Roncato ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Circadian Rhythm ◽  
Biological Activities ◽  
Constant Infusion ◽  
Low Molecular Weight ◽  
Circadian Variations ◽  
Heparin Cofactor Ii ◽  
Heparin Infusion ◽  
Chromogenic Assay ◽  
Heparin Affinity

SummaryWe compared in six patients successively treated with an unfractionated heparin (UFH) and a low molecular weight heparin (LMWH) the variations in plasma anti-Xa activity, measured in a chromogenic assay, during a 36 h constant infusion. The values varied in a wider range during UHF infusion, but remained in the therapeutic range except once in one patient. No circadian rhythm could be demonstrated in our six patients. LMWH infusion yielded very constant anti-Xa circulating activities. In both cases, there were no significant modifications of three proteins with high heparin affinity (antithrombin III, heparin cofactor II, histidine-rich glycoprotein).Our results suggest that the circadian rhythm of the biological activities previously observed in patients treated with constant heparin infusion using clotting method is due to other factors than heparin itself.

Circadian variations of serotonin in plasma and different brain regions of rats

2008 ◽  
Vol 317 (1-2) ◽  
pp. 105-111 ◽  
Author(s):  
Soledad Sánchez ◽  
Cristina Sánchez ◽  
Sergio D. Paredes ◽  
Javier Cubero ◽  
Ana B. Rodríguez ◽  
...  
Keyword(s):  
Brain Regions ◽  
Circadian Variations

Circadian Variations of Luteinizing Hormone Can Have Two Different Profiles in Adolescent Anovulation

1987 ◽  
Vol 65 (3) ◽  
pp. 488-493 ◽  
Author(s):  
ELEONORA PORCU ◽  
STEFANO VENTUROLI ◽  
OTELLO MAGRINI ◽  
ROBERTO BOLZANI ◽  
DANIELA GABBI ◽  
...  
Keyword(s):  
Luteinizing Hormone ◽  
Circadian Variations
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