the interactions of β-lactoglobulin ab in the presence of cationic surfactants such as cetyltrimethylammonium bromide and cetyltrimethylammonium p-toluenesulfonate have been investigated using a variety of experimental techniques such as conductivity, uv-vis spectrophotometry and fluorimetry. the conductivity of surfactants aqueous solutions with β-lactoglobulin shows that the cmc of cationic s...

A new photo-switchable "on-off" host-guest system comprising cucurbit[7]uril (CB[7]) and a photoresponsive cinnamamide derivative (trans-(3-phenyl-acryloylamino)-acetic acid, E-1) is studied. The cinnamamide derivative and CB[7] forms a stable 1 : 1 host-guest complex (CB[7]·E-1) with a high binding constant (K = 2.1 × 10(4) M(-1)). Irradiation of UV light (300 nm) to an aqueous solution of CB[...

Cell culture studies have been performed to compare the mutagenic potential and the induction of sister chromatid exchanges for hematoporphyrin derivative photoradiation, ionizing radiation, and UV radiation. The mutation frequency in Chinese hamster ovary cells at the hypoxanthine-guanine phosphoribosyltransferase locus was measured using resistance to 6-thioguanine. Phenotypic expression time...

Rhodamine B is a synthetic dye that often misused as food coloring in crackers. consumption through can irritate the digestive tract, impair liver function, and cancer. The purpose of study was to determine content rhodamine This used quantitative method, purposive sampling employed technique. Method validation carried out against UV-Visible spectrophotometer testing Validation method produces ...

*Correspondence: T. D. Silva. Departamento de Farmácia. Faculdade de Ciências Biológicas e da Saúde. Universidade Federal dos Vales do Jequitinhonha e Mucuri, Campus JK. Rodovia MGT 367, Km 583, n° 5000, 39100-000, Diamantina, MG, Brasil. E-mail: [email protected] Development and validation of alternative methods by non-aqueous acid-base titration and derivative ultraviolet spectrophoto...