In the experiment investigating the effect of protein on the crystallization rate of calcium carbonate, why is the absorbance at 570 nm chosen for measurement?
This research paper could answer your question :
Synthesis of calcium carbonate nanocrystals and their potential application as vessels for drug delivery
https://doi.org/10.1063/1.4922570
Chewable calcium carbonate tablets showed a significantly (p < 0.05) better mean minimum absorption of calcium (25.6% in exp. I, 22.8% in exp. II) than calcium given in the form of a lactogluconate/carbonate effervescent tablet, (17%), but similar to calcium in a chloride solution (24.7%).
A simple demonstration of how a precipitate is evidence of a chemical reaction taking place is performed by mixing solutions of calcium chloride and sodium carbonate to form the precipitate calcium carbonate (CaCO3).
Calcium carbonate (CaCO3) is characterized by its flexible pore design and functional group modification, which meet the high capacity and targeting requirements of adsorption. Therefore, its charm of "small materials for great use" makes it a suitable candidate for adsorption.
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