Natural vanillin (4-hydroxy-3-methoxybenzaldehyde) produced from vanilla beans and other naturals is one of the most common flavour chemicals widely used in a broad range of flavours. In present work,vanilla beans are permeabilized by aqueous hydrotrope solutions followed by extraction and solubilization of vanillin into the hydrotrope solutions of nicotinamide, sodium salicylate, resorcinol and citric acid. The influence of a wide range of hydrotrope concentrations (0-3.0 mol/L) and different system temperatures (303-333 K) on the solubility of vanillin has been studied. The solubility of vanillin increases with increase in hydrotrope concentration and also with system temperature and nicotinamide were found to be effective for the selective extraction of vanillin with a recovery of 85 % from the aqueous solution of hydrotropes with high purity. The process was further optimized with respect to concentration of hydrotropes and temperature of extraction. A minimum hydrotrope concentration was found essential to show a significant increase in the solubility for vanillin + water system. Consequent to the increase in the solubility of vanillin, the mass transfer coefficient was also found to increase with increase in hydrotrope concentration at 303 K. The enhancement factor, which is the ratio of the value in the presence and absence of a hydrotrope, is reported for both solubility and mass transfer coefficient of vanillin. The Setschenow constant, Ks, a measure of the effectiveness of a hydrotrope, was determined for each case.

The aqueous solubilities of m/p-aminoacetophenone in different concentrations (0-3.0 mol/L) of hydrotropes such as diethyl nicotinamide, sodium pseudocumene sulfonate and sodium thiocyanate solutions at different system temperatures (303K to 333K) were studied. The percentage extraction (%E) of m- aminoacetophenone from m/p-aminoacetophenone mixture increases with increase in hydrotrope concentration. A Minimum Hydrotrope Concentration (MHC) in the aqueous phase was required to initiate the significance of the %E of m-aminoacetophenone. Percentage extraction (%E) is the ratio of moles of m-aminoacetophenone extracted in presence and absence of a hydrotrope. The sensitivity and feasibility of the proposed process are examined by carrying out solubilization and equilibrium precipitation experiments with the mixtures of various compositions. The effectiveness of hydrotropes was measured in terms of Setschenow constant Ks. The extraction data are also fitted in a polynomial equation as the function of hydrotrope concentration. The solubilized material can be recovered by dilution with water.

The world is moving towards hygienic and there is a need for hygienic products in modern lifestyle. It is an opportunity to grow the textile market by meeting the expectation through textile products finished with antimicrobial properties. Multidrug-resistant organisms are increasingly implicated in acute and chronic wound infections, thus compromising the chance of therapeutic options. This paper focuses on a wound dressing with extract from natural sources of neem leaves and turmeric. The efficacy of the product was evaluated by various physical and biochemical tests.

Abstract:The aqueous solubilities of m/p -amino nitrobenzene in different concentrations (0-3.0 mol/L) of hydrotropes such as sodium benzoate, sodium saccharin, dimethyl benzamide at different system temperatures (303 K to 333 K) were studied. The percentage extraction (%E) of m-amino nitrobenzene from m/p -amino nitrobenzene mixture increases with an increase in hydrotrope concentration. A minimum hydrotrope concentration (MHC) in the aqueous phase was required to initiate the significance of the %E of m-amino nitrobenzene. Percentage extraction (%E) is the ratio of moles of m -amino nitrobenzene extracted in presence and absence of a hydrotrope. The sensitivity and feasibility of the proposed process are examined by carrying out solubilization and equilibrium precipitation experiments with the mixtures of various compositions. The effectiveness of hydrotropes was measured in terms of Setschenow constant Ks and reported for all hydrotropes used in this study and determination of aggregation behavior of all hydrotropes were also studied.

The aqueous solubilit ies of m/p-amino nitrobenzene in d ifferent concentrations (0-3.0 mo l/ L) of hydrotropes such as sodium benzoate, Sodiu m saccharin, dimethyl benzamide at different system temperatures (303K to 333K) were studied. The percentage extraction (%E) o f m-amino nitrobenzene fro m m/p-amino nitrobenzene mixture increases with an increase in hydrotrope concentration. A Minimu m Hydrotrope Concentration (MHC) in the aqueous phase was required to initiate the significance of the %E of m-amino nitrobenzene. Percentage extraction (%E) is the ratio of mo les of m-amino nitrobenzene extracted in presence and absence of a hydrotrope. The sensitivity and feasibility of the proposed process are examined by carrying out solubilization and equilibriu m precipitation experiments with the mixtu res of various compositions. The effectiveness of hydrotropes was measured in terms of Setschenow constant Ks and reported for all hydrotropes used in this study and determination of aggregation behavior of all hydrotropes were also studied. Cost effective and eco friendly techniques of removal of less soluble compoments.