02133nas a2200253   4500008004100000022001400041245007700055210006900132260007300201300001200274490000700286520130200293653001201595653001901607653001501626653001501641653001801656653001501674100002101689700002101710700001801731700001901749856011101768       2015                        eng d  a1350-417700aContinuous precipitation of calcium carbonate using sonochemical reactor0 aContinuous precipitation of calcium carbonate using sonochemical  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a132-1390 v243 a<p>The continuous production of calcium carbonate (CaCO3) by precipitation method at room temperature was carried out in a stirred reactor under ultrasonic environment and was compared with the conventional stirring method. The effect of various operating parameters such as Ca(OH)(2) slurry concentration, CO2 flow rate and Ca(OH)(2) slurry flow rate on the particle size of CaCO3 was investigated. The calcium carbonate particles were characterized by Fourier transform infrared (FTIR), wide angle X-ray diffraction (WXRD) and particle size. The morphology was studied by using scanning electron microscopic (SEM) images. The particle size obtained in the presence of ultrasonic environment was found to be smaller as compared to conventional stirring method. The particle size is found to be reduced with an increase in the concentrations of Ca(OH)(2) and increased with increasing CO2 flow rate for both the methods. The slurry flow rate had a major effect on the particle size and the particle size decreased with increased slurry flow rate. Only calcite phase of CaCO3 was predominantly present as confirmed by the characterization techniques for both the preparation methods. In most of the cases rhombohedral calcite particles were observed. (C) 2014 Elsevier B.V. All rights reserved.</p>10aCalcite10aCrystal growth10aMorphology10aNucleation10aParticle size10aUltrasound1 aShirsath, S., R.1 aSonawane, S., H.1 aSaini, D., R.1 aPandit, A., B.  uhttps://library.ncl.res.in/content/continuous-precipitation-calcium-carbonate-using-sonochemical-reactor-002574nas a2200373   4500008004100000022001400041245014200055210006900197260000800266490000700274520138700281653001501668653001501683653002401698653001101722653001601733653002601749653001301775653001401788653001801802653002101820653001701841653002301858653002801881653002801909653001501937100002101952700001801973700002001991700002102011700001802032700001902050856013102069       2017                        eng d  a1350-417700aIntensification of extraction of curcumin from Curcuma amada using ultrasound assisted approach: Effect of different operating parameters0 aIntensification of extraction of curcumin from Curcuma amada usi  cSEP0 v383 a<p><span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; background-color: rgb(248, 248, 248);">Curcumin, a dietary phytochemical, has been extracted from rhizomes of Curcuma amada using ultrasound assisted extraction (UAE) and the results compared with the conventional extraction approach to establish the process intensification benefits. The effect of operating parameters such as type of solvent, extraction time, extraction temperature, solid to solvent ratio, particle size and ultrasonic power on the extraction yield have been investigated in details for the approach UAE. The maximum extraction yield as 72% was obtained in 1 h under optimized conditions of 35 degrees C temperature, solid to solvent ratio of 1:25, particle size of 0.09 mm, ultrasonic power of 250 W and ultrasound frequency of 22 kHz with ethanol as the solvent. The obtained yield was significantly higher as compared to the batch extraction where only about 62% yield was achieved in 8 h of treatment. Peleg's model was used to describe the kinetics of UAE and the model showed a good agreement with the experimental results. Overall, ultrasound has been established to be a green process for extraction of curcumin with benefits of reduction in time as compared to batch extraction and the operating temperature as compared to Soxhlet extraction.</span></p>10aAcrylamide10aCavitation10aCurcumin Extraction10aDesign10aEnhancement10aFunctionalized Silica10akinetics10aMicrowave10aNanoparticles10aNatural-products10aOptimization10aPhenolic-compounds10aProcess Intensification10aSolid-liquid Extraction10aUltrasound1 aShirsath, S., R.1 aSable, S., S.1 aGaikwad, S., G.1 aSonawane, S., H.1 aSaini, D., R.1 aGogate, P., R.  uhttps://library.ncl.res.in/content/intensification-extraction-curcumin-curcuma-amada-using-ultrasound-assisted-approach-effect