The present study investigates the gradual replacement of Ca2+ with Mg2+ ions in brushite (CaHPO4·2H2O). To date, this approach has not been systematically explored and may prove beneficial for production Ca1−xMgxHPO4·nH2O materials tailored properties which are suitable environmental medical applications. For their production, solutions sodium dihydrogen orthophosphate dehydrate, NaH2PO4·2H2O,...

An especially intriguing aspect of nutrients is their capacity to serve as signals. Nutrient signaling pathways play key roles in plant growth and development and can interact and overlap in interesting ways. In this issue, Riveras et al. (2015) report on two plant macronutrients, nitrate and calcium, and show how responses induced by nitrate depend in part on calcium signaling mechanisms. The ...

Hydroxyapatite (HAp) is a natural hard tissue constituent widely used for bone and tooth replacement engineering. In the present work, synthetic HAp was obtained from calcium nitrate tetrahydrate (Ca(NO3)2·4H2O) ammonium phosphate dibasic (NH4)2HPO4 following an optimized microwave assisted hydrothermal method. The effect of pH evaluated by addition hydroxide (NH4OH). Hence, different character...

for finding out the effect of nitrogen and calcium carbonate fertilizers on nitrate and nitrogen accumulation in aboveground biomass, calcium concentration and dry weight of leaves of satureja hortensis l., a factorial experiment was carried out based on randomized complete block design with three replications in karaj in 2008. the nitrogen fertilizer was in four levels (0, 50, 100 and 150 kg. ...

Calcium doped nickel ferrite powders have been prepared by sol-gel combustion technique. Metal nitrates, such as calcium nitrate, nickel nitrate and ferric nitrate, were used as the source materials and citric acid and polyvinyl alcohol were used as the burning agent and agglomeration reducing agent, respectively. The average crystallite size of the prepared ferrite was in the order of ~70- 92 ...

Calcium doped nickel ferrite powders have been prepared by sol-gel combustion technique. Metal nitrates, such as calcium nitrate, nickel nitrate and ferric nitrate, were used as the source materials and citric acid and polyvinyl alcohol were used as the burning agent and agglomeration reducing agent, respectively. The average crystallite size of the prepared ferrite was in the order of ~70- 92 ...

Calcium deficiency causes Endocarp Lesion disorder in pistachio nut. To investigate the effects of various calcium treatments on Endocarp Lesion disorder and some nut qualitative characteristics in Pistachio cv. Akbari, an experiment was done in completely randomized design with four treatments (1- control treatment, 2- calcium chelate foliar spray, 3- calcium nitrate and 4– calcium sulfate (gy...

to investigate the influence of salinity and calcium (ca) on some properties of plantago ovata, a pot factorialexperiment based on randomized complete block design with three replicates was conducted in jiroft, south of kermanprovince, iran. three salinity levels of 0, 100 and 200 mm nacl and ca levels of 0, 5 and 10 mm calcium nitrate wereapplied as the first and second factors, respectively. ...