The influence of poor solvent quality on fluid demixing of a model mixture of colloids and nonadsorbing polymers is investigated using density functional theory. The colloidal particles are modeled as hard spheres and the polymer coils as effective interpenetrating spheres that have hard interactions with the colloids. The solvent is modeled as a two-component mixture of a primary solvent, rega...

Drug solubility is one of the most significant physicochemical properties as it related to drug design, formulation, quantification, recrystallization, and other processes, so understanding crucial for pharmaceutical industry. In this context, research presents thermodynamic analysis sulfadiazine (SD) in cosolvent mixtures {acetonitrile + 1-propanol} at 9 temperatures (278.15 K–318.15 K), which...

The dynamics of dimethyl sulfoxide (DMSO)/water solutions with a wide range of water concentrations are studied using polarization selective infrared pump-probe experiments, two-dimensional infrared (2D IR) vibrational echo spectroscopy, optical heterodyne detected optical Kerr effect (OHD-OKE) experiments, and IR absorption spectroscopy. Vibrational population relaxation of the OD stretch of d...

Comparative study on organosolv pulping method have been done by using various mixtures of water and organic solvents as delignifying agents including ethylene glycol-water mixtures, ethanol-water mixtures and acetic acid-water mixtures to extract cellulose from agricultural crop biomass (Oil palm empty-fruit bunches-OPFB). The yield of organosolv pulping with ethylene glycol-water mixture, eth...

The enthalpies of solution of the cyclic ethers 1,4-dioxane, 12-crown-4 and 18-crown-6 in mixtures of ethanol and water have been measured within the whole mole fraction range at T = 298.15 K. The enthalpy of solvation has been calculated. In pure ethanol and pure water, the solvation enthalpy of the investigated cyclic ethers depends linearity on the number of -CH2CH2- groups in the cyclic eth...

Pyrene end-labeled double hydrophilic diblock copolymers, poly(N-isopropylacrylamide)-b-poly(oligo(ethylene glycol) methyl ether methacrylate) (Py-PNIPAM-b-POEGMA), were synthesized via consecutive reversible addition-fragmentation chain transfer polymerization using a pyrene-containing dithioester as the chain transfer agent. These diblock copolymers molecularly dissolve in pure methanol and w...

In this work, we study the use of supercritical fluid technology based on carbon dioxide to fractionate a complex carbohydrate mixture, which is a dairy-based prebiotic ingredient containing galacto-oligosaccharides (GOS) along with monosaccharides and disaccharides. The beneficial health effects of this commercial mixture, such as the improvement of the immune system, have been associated to i...

Snakehead fish extract has been recognized for its potential in healing postoperative wounds and burns. The contains albumin, which aids tissue formation processes. To create a high-quality wound drug, the needs to be formulated into concentrated form combined with solvent that can effectively dissolve active substances. Understanding solubility profile of composition is crucial this purpose. T...

The 3-methylindole (3MI) oxygenation sensitized by psoralen (PSO) has been investigated in 100%, 20% and 5% O 2 -saturated water/ dioxane (H 2 O/Dx) mixtures. The lowering of the O 2 * chemical rate when water (k chem 3MI = 1.4 109 M s) is replaced by deuterated water (k chem 3MI = 1.9 108 M s) suggests that hydrogen abstraction is involved in the rate determining step. A high dependence of the...