<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ankamwar, Balaprasad</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Morphology and polymorphic phase changes of calcium carbonate micro/nanocrystals using fruit extracts</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Nanoscience and Nanotechnology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Aragonite</style></keyword><keyword><style  face="normal" font="default" size="100%">Calcite</style></keyword><keyword><style  face="normal" font="default" size="100%">Emblica officinalis</style></keyword><keyword><style  face="normal" font="default" size="100%">Morphology Changes</style></keyword><keyword><style  face="normal" font="default" size="100%">Polymorphic Changes</style></keyword><keyword><style  face="normal" font="default" size="100%">Tamarindus indica</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">MAY</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">5</style></number><publisher><style face="normal" font="default" size="100%">AMER SCIENTIFIC PUBLISHERS</style></publisher><pub-location><style face="normal" font="default" size="100%">25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA</style></pub-location><volume><style face="normal" font="default" size="100%">11</style></volume><pages><style face="normal" font="default" size="100%">3997-4003</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This study reveals the morphology and polymorphic phase changes of calcium carbonate crystals into a mixture of calcite and aragonite micro/nanocrystals of interesting morphology at room temperature by a simple reaction with fruit extracts of Tamarindus indica and Emblica officinalis respectively by mixing CaCO(3) solutions with their corresponding extracts. The control experiments were carried out to establish the plausible role of tartaric acid from Tamarindus indica and ascorbic acid from Emblica officinalis in this regard. The quantitative determination of CaCO(3) phases was done based on the use of intensities obtained from corresponding XRD spectrum. The molar %. of aragonite was found to be more in case of TA and AA rather than TI and EO respectively, however the calcite was observed to be the predominant phase in all four reactions. Interestingly, the TI changes the rhombohedral morphology of calcite to elongated rods, whereas EO induces a great polymorphic phase change.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue><custom3><style face="normal" font="default" size="100%">&lt;p&gt;Foreign&lt;/p&gt;</style></custom3><custom4><style face="normal" font="default" size="100%">1.57</style></custom4></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Shirsath, S. R.</style></author><author><style face="normal" font="default" size="100%">Sonawane, S. H.</style></author><author><style face="normal" font="default" size="100%">Saini, D. R.</style></author><author><style face="normal" font="default" size="100%">Pandit, A. B.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Continuous precipitation of calcium carbonate using sonochemical reactor</style></title><secondary-title><style face="normal" font="default" size="100%">Ultrasonics Sonochemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Calcite</style></keyword><keyword><style  face="normal" font="default" size="100%">Crystal growth</style></keyword><keyword><style  face="normal" font="default" size="100%">Morphology</style></keyword><keyword><style  face="normal" font="default" size="100%">Nucleation</style></keyword><keyword><style  face="normal" font="default" size="100%">Particle size</style></keyword><keyword><style  face="normal" font="default" size="100%">Ultrasound</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2015</style></year><pub-dates><date><style  face="normal" font="default" size="100%">MAY</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">ELSEVIER SCIENCE BV</style></publisher><pub-location><style face="normal" font="default" size="100%">PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS</style></pub-location><volume><style face="normal" font="default" size="100%">24</style></volume><pages><style face="normal" font="default" size="100%">132-139</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;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.&lt;/p&gt;</style></abstract><custom3><style face="normal" font="default" size="100%">&lt;p&gt;Foreign&lt;/p&gt;</style></custom3><custom4><style face="normal" font="default" size="100%">4.556</style></custom4></record></records></xml>