tagliar ha scritto:Quindi dovrebbe essere un sale di rame di questo peptide, giusto?
penso di si.
[no linguaggio sms] tu che sei del campo, mi puoi dire cosa ne pensi di questa procedura che è alla base del peptide di rame "seconda generazione"? si crea secondo te un peptide con la seguente procedura ?
"This Example describes methods used in the preparation of the peptone-metal complexes having biological activities described further below.
Soybean peptone was obtained from Sigma Chemical Company, St. Louis, Mo. (type IV, number P 0521), as was cupric chloride hydrate (no. C 6641). Indium (III) chloride, 99% pure; tin (II) chloride, 99% pure; and tin (IV) chloride, 99% pure were obtained from Aldrich Chemical Company, Milwaukee, Wis.
Soybean peptones (enzymatic digests of soybean protein) were dissolved in warm water (40.degree. C.) at a concentration of 20% (weight/volume), then mixed with a aqueous solution of a metal salt (copper(II) chloride, tin(II) chloride, tin(IV) chloride, indium(III) chloride, or zinc(II) chloride) at a salt concentration of 20% (w/v). The amount of volume of salt solution added was that amount needed to induce a copious precipitate in the solution, or about 20 to 50% of the initial volume of soybean peptone, after the pH was adjusted with sodium hydroxide to induce maximum formation of precipitate (between 6.0 to 7.0). The precipitate contained substantial amounts of hydrophobic peptides, plus a small amount (3.8-4.2% by assay) of the metal salt complexed to the peptides.
The precipitates were removed by centrifugation at 10,000G for 20 minutes, then processed as a wet paste into further products. The sticky paste can be applied directly to the skin or is formulated into skin creams and lotions at concentrations of usually 5 to 20% (w/w) although higher concentration are also effective. "