Possible Interaction: Nitrogen and Calcium Supplement

“There was no significant difference in the apparent absorption of calcium, so that overall calcium balance was -37 mg/day on the 12 g nitrogen diet , and significantly lower at -137 mg/day in subjects consuming the high protein diet.”

“A calcium supplement of 0.9 g for four subjects on the 12 g nitrogen diet caused an increase in urinary calcium from 68 to 160 mg/day.”

“During weight loss, nitrogen intake positively affects calcium balance and consequent preservation of bone mineral content.”

“A positive correlation between nitrogen and calcium AA as absolute values and alimentary intake was observed, while there was no correlation when AA were considered as per cent of the intake.”

“Statistically significant negative associations with calcium balance were found for nitrogen and for caffeine, but no effect could be found for phosphorus.”

“We therefore conclude that bulky substituents on the nitrogen atom increase calcium antagonistic activity in this series of compounds.”

“The modelling results reveal that the highest TN removal efficiency decreases from ca.”

“… nitrogen (N) addition resulted in surface soil acidification and decreased acid buffering capacity, increased the availability of carbon (C), … (S) and DTPA-extractable iron (Fe), manganese (Mn), and copper (Cu) contents, depleted the sum of base cations calcium (Ca), magnesium (Mg), potassium (K) and … diversity of soil microbial community.”

“ Ca metal atoms end-capping the nitrogen ends of two adjacent -CN groups lead to electride character while a Ca metal atom bonded directly to the COT ring leads to greater charge transfer.”

“ Nitrogen addition significantly decreased exchangeable Ca by up to 33% in large and small macroaggregates and exchangeable Mg by up to 27% in three aggregates but significantly increased extractable Fe, Mn and Cu concentrations (by up to 262%, 150%, and 55%, respectively) in all aggregate size classes.”