Sol–gel technology and template synthesis in thin gelatin films

Gelatin as It Is: History and Modernity

“…The structure and properties of collagen and gelatin have been studied repeatedly over the past few decades; (see, in particular, [ 20 , 21 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 ]); the total number of works devoted to them is at least several thousan...…”

“…In addition, these cells, already filled with molecules of a chemical compound, retain a certain freedom of movement in space. One can try to estimate the size of such a cell [ 67 ]. Indeed, the volume of the polymeric gelatin layer (V e ) with an area of 1 cm 2 and a thickness of 20 µm is equal to (1.0 × 1.0 × 20 × 10 −4 ) cm 3 = 2.0 × 10 g/cm 3 , which is (0.5 × 2.0 × 10 −3 ) g = 1.0 × 10 −3 g. Since, as we mentioned earlier, the molecular mass of gelatin ( M Gel ) is ~(2.0–3.0) × 10 5 , the number of its molecules in a mass equal to 1.0 × 10 −3 g would be (1.0 × 10 −3 / M Gel ) × N A ) = (1.0 × 10 −3 / M Gel ) × 6.02 × 10 23 ) = (2.0–3.0) × 10 15 .…”

Elemental Silver Nanoparticles: Biosynthesis and Bio Applications

“…polypeptides. The dimensional structure, which is now well studied [195,196,197], and in this structure there are many cavities of nanoscale size, which can serve as a kind of molecular nanoreactors. The reduction reaction Ag(I)→Ag occurs namely in such cavities; in this case, some water-insoluble silver compound (AgCl, AgBr, Ag 4 [Fe(CN) 6 ] et al) immobilized in a gelatin mass acts as a silver-containing precursor.…”

“…Details of the production of Ag-NP using such a specific method were presented in [200,201]. The idea that in the specific conditions of chemical processes in the gelatin matrix, as well as due to the above-mentioned specific structure of the gelatin itself, nanoparticles of a wide variety of chemical compounds can be formed in it, was expressed in a number of earlier works, particular in reviews [195,196,197,202,203].…”

DFT OPBE/TZVP Сalculation of Molecular Structures of (5656) Macroheterocyclic Chelates of Double Charged 3d-Element Ions with 1,5,8,11-Tetraazacyclotetradecanetetrathione-2,3,9,10 and Its Dioxa- and Dithia Analogs

“…However, in the specific conditions that takes place during complexing in biopolymer-immobilized matrices, these reactions, in principle, would be able to be realized. [3,16] …”