Organic–inorganic hybrid polysilsesquioxane nanospheres as UVA/UVB absorber and fragrance carrier

Graphene Oxide Conjugated Magnetic Beads for RNA Extraction

“…[9] The aromatic ring of CÀCo fG Ow as found at 1620 cm À1 .T he bands at 1217 and 1040-1060 cm À1 indicated the presenceo f the epoxy (CÀOH)a nd alkoxy (CÀO) of GO, respectively, [9,10] while the spectra of the aminated silica-coated magnetic beads was obtained at 3000-3700, 2920, 2850, 1625, 1600, 1560, 1510, 1490, 1450, 1410, 1327, 1150,1 120 cm À1 which indicatest he presence of APTS on the surface of the beads. [11] A vibrational mode around 1625 and 1600 cm À1 represents the existence of an imine group produced by the oxidation of an amine bicarbonate salt. Also, the amine on the surface of the silica-coated magnetic beads can reactw ith CO 2 in the air to create the bicarbonate form,r esulting in the appearance of vibrational modes at 1560, 1490, and 1327 cm À1 .…”

“…[9] The shape bands at 2920 and 2850 cm À1 confirmed the presenceo fC ÀCa tt he sp 2 hybridization.T he free carbonyl groups (COOH)o fG Ow ere found in the 1720 (stretching of C=O) and 1360 cm À1 (stretching of CÀO) bands. [11] A vibrational mode around 1625 and 1600 cm À1 represents the existence of an imine group produced by the oxidation of an amine bicarbonate salt. [11] A vibrational mode around 1625 and 1600 cm À1 represents the existence of an imine group produced by the oxidation of an amine bicarbonate salt.…”

Fully-biobased UV-absorbing nanoparticles from ethyl cellulose and zein for environmentally friendly photoprotection

“…S11 †), where retention values were similar to synthetic UV lters physically encapsulated into nanoparticles developed for sunscreen applications. 13,36,37 The retention of p-coumaric acid could not be measured accurately via our spectrophotometric method because the molecule is prone to cis-trans isomerisation which changes the absorbance. 30 For these retention experiments the absorbance of 10 mL of the UV absorbing nanoparticles in dialysis tubing was measured at time intervals when sitting in a very large body of water (300 mL).…”

Nanodispersed UV blockers in skin-friendly silica vesicles with superior UV-attenuating efficiency

“…In another example, hybrid organosilica particles were prepared by incorporating UV absorptive chromophores in the network, 55 showing good UV absorbance compared to chromophore in true solution. 23 However, this method is not applicable to UV blockers incapable of crosslinking with silica precursors. To date, a facile method to achieve UV-attenuating efficiency of hydrophobic organic UV blockers comparable to that in true solution is still a 60 challenge.…”