The separation technique of acidbase extraction was used to separate three unknown dye compounds that had different pH from the mixture. The identification of the unknown dyes compounds was performed based on the color of the dyes. Methyl Orange, a common dye, was synthesized and purified by recrystallization. The effectiveness of recrystallization was determined by calculating the percentage r...

A method for stably purifying a functional dye, phycocyanin from Spirulina platensis was developed by a hexane extraction process combined with high pressure. This was necessary because this dye is known to be very unstable during normal extraction processes. The purification yield of this method was estimated as 10.2%, whose value is 3%-5% higher than is the case from another conventional sep...

鈴木 守 ・新井 弘祐 Several investigators have used the extravasal leakage of the circulating dye as an indicator of the change in capillary permeability by measuring, for example, the mean diameter of the blueing (1-3), the visual grading of the blueing (4, 5) or size and inten sity of the staining (6-12). Studying the effects of organic solvents on the capillary permeability, one of the present autho...

Extraction of trace amounts of toxic heavy metals from complicated environmental matrixes is a  challenging task. The aim of this investigation is the comparison of the extraction efficiencies and other related experimental variables ( chemicals, effect of pH, potential interfering ions) on the determination of inorganic lead ( ) which is present in waste water of dye industries. Compared techn...


 Natural pigments extracted from plants are raised as a vital substitute to artificial dyes. The present study was conducted extract pigment Bistorta amplexicaule and evaluate its dyeing property, antimicrobial activity toxicity. extraction done by maceration sonication methods with 7.5% 5% yield, respectively. appeared bright- amber colored which used for fabrics food using traditional m...