Physiological Studies on Diurnal Biological Rhythms of Porphyra-II

Studies in Diurnal Rhythms Ii. Changes in the Physiological Responses of the Wood- Louse Oniscus Asellus to Environmental Stimuli

Studies in diurnal rhythms. I. Rhythmic behaviour in millipedes.

In recent years the phenomenon of 24 hr. periodicity in animals has attracted considerable attention. Diurnal rhythms have been reviewed by Welsh (1938), Park (1940) and Calhoun (1944), and present many interesting physiological and ecological problems. It is evident that they are common and manifest in diverse ways. Park, Lockett & Myers (1931), in a short study of nocturnal ecology among fore...

The Effects of Daily Rhythms on Sports Functions and Physiological Variables of Immune Elite Swimmers

Introduction Daily rhythm as one of the biological rhythms with a period of about 24 hours on various body systems and physiological responses affect on them. Body temperature is a fundamental variable as one of the specifications used daily rhythms The main purpose of this study was evaluating the effect of circadian rhythms on exercise performing and physiological variants of security system ...

Effects of Lycium barbarum. polysaccharide on type 2 diabetes mellitus rats by regulating biological rhythms

Objective(s): Type 2 diabetes mellitus (T2DM) is associated with circadian disruption. Our previous experimental results have showed that dietary Lycium barbarum. polysaccharide (LBP-4a) exhibited hypoglycemic and improving insulin resistance (IR) activities. This study was to explore the mechanisms of LBP-4a for improving hyperglycemia and IR by regulating biological rhythms in T2DM rats. Mat...

Hormonal influence on diurnal glycogen rhythms in rat skeletal muscles.

1. Normal, diabetic, and sympathectomized rats were killed at intervals during a 12 h light (6 a.m. to 6 p.m.)/12 h dark cycle to determine (1) the patterns of diurnal glycogen rhythms in skeletal muscle fibre types, and (2) if the absence of insulin or the catecholamines epinephrine and norepinephrine abolished these rhythms. 2. Normal rat muscles lost and restored 40-60% of their glycogen sto...