Some biological aspects of semen were investigated in the Persian sturgeon, Acipenser persicus, by determination of seminal plasma indices (ionic composition and osmolality), sperm density and their relationships with sperm motility. The osmolality of seminal plasma ranged from 42.00 to 111.00 mOsmol Kg-1. The concentrations of Sodium (Na+), Potassium (K+), Chloride (Cl-), Calcium (Ca2+) and Ma...

BACKGROUND AND PURPOSE High intakes of calcium, potassium, and magnesium have been hypothesized to reduce risks of cardiovascular disease, but only a few prospective studies have examined intakes of these cations in relation to risk of stroke. METHODS In 1980, 85 764 women in the Nurses' Health Study cohort, aged 34 to 59 years and free of diagnosed cardiovascular disease and cancer, complete...

The development of electrical excitability involves complex coordinated changes in ion channel activity. Part of this coordination appears to be due to the fact that the expression of some channels is dependent on electrical activity mediated by other channel types. For example, we have previously shown that normal potassium current development in embryonic skeletal muscle cells of the frog Xen...

This study aims to determine the levels of macro minerals such as potassium, calcium, sodium, and magnesium in fresh noni fruit. The sample fruit was destructed, then quantitative analysis were performed using atomic absorption spectrophotometry (AAS) at a wavelength 766.5 nm for potassium; 422.7 calcium; 589.0 sodium; 285.2 magnesium. advantages this method are selective sensitive. average % r...

An intermediate conductance calcium-activated potassium channel, hIK1, was cloned from human pancreas. The predicted amino acid sequence is related to, but distinct from, the small conductance calcium-activated potassium channel subfamily, which is approximately 50% conserved. hIK1 mRNA was detected in peripheral tissues but not in brain. Expression of hIK1 in Xenopus oocytes gave rise to inwar...

The movements of calcium in muscle have been followed during contraction and contracture to test the hypothesis that the release of calcium from the surface of the muscle membrane during stimulation initiates the contractile mechanism. Nitrate ion increases the calcium influx during a single twitch and during potassium contracture, and also increases the tension developed. The increased entry o...

slices showed an extrusion of 5 mmoles calcium per kg dry weight that was completed after 6 min, while potassium accumulation showed a lag period of about 15 min. Similar results were obtained from livers of rats of different strains and from livers of goose, opossum, and baboon. Slices of 5123tc extruded 16 mmoles calcium per kg dry weight during about 10 min, the initial rate being about five...

The present study was undertaken to the effect of different minerals on infertility in cows (n=885) belonging Northern Western Himalayan regions state. Cows suffering from types such as endometritis, anestrus, silent estrus and showing metestrual bleeding were evaluated compared with normal cyclic pregnant cows. Minerals calcium, phosphorous, magnesium, copper, zinc, sodium, potassium. levels c...

results no significant changes were observed in serum potassium, phosphorus and calcium levels at the end of the passive exercise program compared to the baseline. however, phosphorus levels were significantly decreased in the active exercise program (p < 0.05). moreover, the mean diastolic blood pressure was significantly decreased after the passive exercise (p = 0.039). passive exercise did n...