Showing papers by "Pallu Reddanna published in 1981"
TL;DR: In general, acclimation to acidic pH seems to result in the elevation of the synthetic phase of hepatic carbohydrate metabolism, which is related to inhibited glycolysis with an onset of gluconeogenesis in fresh water fish.
Abstract: Fresh water fish, Tilapia mossambica (Peters), were exposed to various pH media. O2 consumption of the fish was suppressed in the pH media on either side of neutrality. Lethal limits of pH were det...
21 citations
TL;DR: The muscle metabolism was oriented towards conservation of carbohydrates and lesser production of organic acids on acclimation, as a possible metabolic adaptive mechanism of the fish, enabling them to counteract the effects of sublethal acid water.
Abstract: Freshwater fish, Tilapia mossambica (Peters), were subjected to acute exposure and acclimation to sublethal acid water (pH 4.0), and the muscle metabolism was investigated. Differential patterns of carbohydrate metabolism were witnessed in the red and white muscles in response to both acute exposure and acclimation. The glycogen content of red muscle was elevated whereas that of white muscle was depleted on acute exposure. But on acclimation, both the muscles had elevated glycogen content. The red muscle seems to mobilize carbohydrates into both hexose mono- and di-phosphate pathways, but white muscle does so only into the hexose monophosphate pathway on acclimation. In general, both the muscles exhibited suppressed glycolysis and elevated oxidative phase leading to elevated glycogen level. The muscle metabolism was oriented towards conservation of carbohydrates and lesser production of organic acids on acclimation, as a possible metabolic adaptive mechanism of the fish, enabling them to counteract the im...
7 citations
Journal Article•
TL;DR: In vivo electrical stimulations were applied to the gastrocnemius muscles of intact frogs for prolonged periods which lead to improved muscular efficiency and delayed onset of fatigue which was correlated to increased tissue contractile proteins and decreased collagen content.
Abstract: In vivo electrical stimulations were applied to the gastrocnemius muscles of intact frogs for prolonged periods which lead to improved muscular efficiency and delayed onset of fatigue. The muscular strength improvement was correlated to increased tissue contractile proteins and decreased collagen content. Elevated levels of muscular fuels, mitochondrial content, oxidative metabolism in the stimulated muscles were suggested to be responsible for the delayed onset of fatigue. In view in these characteristics regarding the improvement at physical and metabolic levels, the muscles exposed to chronic electrical stimulations were termed as trained muscles. The applicability of electrical stimulations to induce the training effects into the muscles in atrophic and dystrophic conditions to avert the muscle wastings was suggested.
4 citations
Journal Article•
TL;DR: The pattern of changes in the muscle chemical components on chronic exposure to repeated electrical stimulations suggested the onset of regulation on muscle metabolism leading to carbohydrate sparing process and muscular hypertrophy.
Abstract: Electrical stimulations of low voltage, frequency and short duration of time are suitable for amphibian muscle to induce localized muscular exercise in an intact animal. The pattern of changes in the muscle chemical components on chronic exposure to repeated electrical stimulations suggested the onset of regulation on muscle metabolism leading to carbohydrate sparing process and muscular hypertrophy. The applicability of this procedure to prevent the muscle wasting in atrophic and dystrophic muscles is suggested.
3 citations