Conclusions: Crystals forming mineral blocks of mostly compact matter are nucleated on organic substrates, with their growth controlled by the diffusion of building units through the virtually stagnant layer of interstitial fluid wetting the deposit surface. Preferentially formed precursors of hydroxyapatite, dicalcium, octacalcium and/or amorphous calcium phosphate, are in later stages of depo...

The calcium phosphate composite octacalcium / calcite was obtained at pH 5–7 from the CaCO 3 /Ca(H 2 PO 4 ) aqueous suspension in a galvanostatic mode current density of 20 mA/cm for min. Drying 80 °C without precipitate maturation stage led to powder formation consisting brushite, and small amount phosphate. Prolonged air months hydrolytic transformation brushite into stabilized by calcite. us...

The circadian rhythms of the calcium oxalate, calcium phosphate, and brushite saturation levels as estimated by the AP(CaOx), AP(CaP), and AP(Bru) indices (Tiselius), respectively, were studied in 5 healthy males on three different occasions. These indices were calculated from the data of urinary specimens collected in 2.5-hour fractions except during sleep. The calcium oxalate and brushite sat...

In conditions of fluctuating light, cyanobacteria thermally dissipate excess absorbed energy at the level of the phycobilisome, the light-collecting antenna. The photoactive Orange Carotenoid Protein (OCP) and Fluorescence Recovery Protein (FRP) have essential roles in this mechanism. Absorption of blue-green light converts the stable orange (inactive) OCP form found in darkness into a metastab...

Recently, calcification was observed on implanted intraocular lens (IOL) surfaces when viscoelastic substances were applied during surgery. To elucidate the mechanisms of mineral formation, the crystallization of calcium phosphates on IOL surfaces was studied in vitro with nanomolar sensitivity using a constant composition method. Three different commercial viscoelastic materials (Viscoat, OcuC...