In the present investigation, mixed-solvency approach has been applied for the enhancement of aqueous solubility of a poorly water- soluble drug, zaltoprofen (selected as a model drug), by making blends (keeping total concentrations 40% w/v, constant) of selected water-soluble substances from among the hydrotropes (urea, sodium benzoate, sodium citrate, nicotinamide); water-soluble solids (PEG-...

Objective: Methotrexate (MTX) is a folate antimetabolite used for the management of neoplastic diseases like leukemia and breast cancer, also in treatment psoriasis as well rheumatoid arthritis. The goal this research was to improving solubility dissolution profile methotrexate solid dispersion by using different polymers. Methods: A total six formulas were prepared solvent evaporation method p...

BACKGROUND PEG-based laxatives are considered today the gold standard for the treatment of constipation in children. PEG formulations differ in terms of composition of inactive ingredients which may have an impact on acceptance, compliance and adherence to treatment. We therefore compared the efficacy, tolerability, acceptance and compliance of a new PEG-only formulation compared to a reference...

The crystal structure of Ru(2, 2'-bipyridine)2(imidazole)(His83)azurin (RuAz) has been determined to 2.3 A -resolution by X-ray crystallography. The spectroscopic and thermodynamic properties of both the native protein and [Ru(2, 2'-bipyridine)2(imidazole)2]2+ are maintained in the modified protein. Dark-green RuAz crystals grown from PEG 4000, LiNO3, CuCl2 and Tris buffer are monoclinic, belon...

A novel poly(ethylene glycol) (PEG)-based block copolymer possessing a 4-vinylbenzylphosphonate repeating unit in another segment (PEG-block-poly(4-vinylbenzylphosphonate)) (PEG-b-PVBP) was designed and successfully synthesized. As a control, an end-functionalized PEG possessing a mono-phosphonate group (PEG-PO(3)H(2)) was also synthesized. The surface of near-infrared (NIR) phosphors (i.e., yt...

Benzopolysulfanes, 4-CH(3)(OCH(2)CH(2))(3)NHC(O)-C(6)H(4)-1,2-S(x) (x = 3-7 and 9) were synthesized with a PEG group attached through an amide bond and examined for water solubility, antitumor activity, and propensity to equilibrate and desulfurate. LCMS and HPLC data show the PEG pentasulfane ring structure predominates, and the tri-, tetra-, hexa-, hepta-, and nonasulfanes were present at ver...

The Leuconostoc species require sucrose in the culture medium as an inducer for the elaboration of glucosyltransferase (GTF) and glucans. Among all the reported putification methods, polyethylene glycol (PEG) is a effective and single step purification method for GTF from Leuconostoc mesenteroides. The extracellular GTFs from Leuconostoc mesenteroides L.m.28 and mutant Leuconostoc mesenteroides...

In the present work, we investigate ${\ensuremath{\eta}}_{c}K$, $J/\ensuremath{\psi}K$, ${\ensuremath{\eta}}_{c}{K}^{*}$, and $J/\ensuremath{\psi}{K}^{*}$ hidden-charm decay modes for $c\overline{c}s\overline{u}$ four-quark system in molecular compact tetraquark scenarios using quark-exchange model. Our theoretical results indicate that if newly observed states ${Z}_{cs}(3985)$ ${Z}_{cs}(4000)$...

In the present work, we investigate ${\ensuremath{\eta}}_{c}K$, $J/\ensuremath{\psi}K$, ${\ensuremath{\eta}}_{c}{K}^{*}$, and $J/\ensuremath{\psi}{K}^{*}$ hidden-charm decay modes for $c\overline{c}s\overline{u}$ four-quark system in molecular compact tetraquark scenarios using quark-exchange model. Our theoretical results indicate that if newly observed states ${Z}_{cs}(3985)$ ${Z}_{cs}(4000)$...