The present invention also provides a convenient method of producing zinc pyrrolidonecarboxylate dihydrate with higher optical purity, a higher yield, and better solution property by adding a zinc salt to an aqueous medium containing a salt of pyrrolidonecarboxylic acid as a starting material and ...
It's a synergistic association of two great things: Zinc and L-PCA. TheZincpart is there to helpnormalize sebum productionandlimit the proliferation of evil acne-causing bacteria.L-PCAstands for pyrrolidone carboxylic acid and it's a key molecule in the skin that helps with processes ofhydrati...
the solubility of zinc salts is usually low, making it difficult to add zinc compounds to cosmetics, and difficult for the effects of zinc compounds to manifest. We paid close attention to pyrrolidone carboxylic acid (PCA), which is an organic acid, as a counter for the formation of zinc s...
Zinc-PCA is a trace element but differs from zinc. PCA standsfor Pyrrolidone carboxylic acid. Zinc PCA (or “zinc salt”) has been shown to be very effective for treating pimples, breakouts. It can help to reduce redness and sebum secretion and supports the general healing process of the s...
Synthesis and optical properties of nanocrystalline ZnO powders by a simple method using zinc acetate dihydrate and poly(vinyl pyrrolidone) This paper reports the synthesis and characterization of nanocrystalline ZnO powders by a simple method using zinc acetate dihydrate and polyvinyl pyrrolid... S ...
(1,5-PD, 96%), poly(vinyl pyrrolidone) (PVP,Mw = 55,000), copper(II) acetylacetonate (Cu(acac)2, ≥ 99.95%), titanium (IV) oxide (P25, TiO2, 99.5%), sodium carbonate (Na2CO3, ≥ 99.0%), and perchloric acid (HClO4, 60%) were purchased from Sigma-Aldrich and used ...
1103, M.W. 10,000 and EMA Grade 61, and 1:1 copolymers of acrylic acid with methyl or hydroxyethyl methacrylate, methyl or ethyl acrylate, isobutyl vinyl ether or N-vinyl-2-pyrrolidone. Suitable generally, are polymerized olefinically or ethylenically unsaturated carboxylic acids containing an ...
An efficient semi-organic nonlinear optical bis (4-acetylanilinium) tetrachloridozincate [(C8H10NO)2 ZnCl4] (B4ATCZ) single crystal was synthesized and suc
polyethyl (or propyl)ene glycols, alkylaryl or fatty alcohol polyglycol ethers, fatty acid polyglycol esters, polyvinyl-pyrrolidones or amphoteric hydroxyethylation products, with benzoylacetonitrile, benzal- or benzoyl-acetone, acetophenone, 3-acetyl- or acetyl-pyridine or m-hydroxybenzaldehyde; thio ...
(meth)acrylamide, N-methoxymethyl(meth)acrylamide, N-butoxymethyl(meth)acrylamide, N,N-dimethyl(meth)acrylamide, N,N-dimethylaminopropyl(meth)acrylamide, and N,N-dimethylaminoethyl(meth)acrylamide; aromatic nitrogen-containing monomers such as 2-vinylpyridine, 1-vinyl-2-pyrrolidone, and 4-...