01429nas a2200145   4500008004100000245008000041210006900121260000800190300001400198490000700212520092400219100001601143700001501159856010901174       2016                        eng d00aDisinfection of water using vortex diode as hydrodynamic cavitation reactor0 aDisinfection of water using vortex diode as hydrodynamic cavitat  cAUG  a1867-18700 v283 aHydrodynamic cavitation offers distinct advantages for water disinfection and wastewater treatment particularly at large scales of operations. Vortex Diode is a fluidic device, which is conventionally used as a leaky non-return valve in nuclear industry. Recently this device was shown to be effective hydrodynamic cavitation device. In the present study, we have investigated use of cavitation in vortex diode for water disinfection application. Escherichia coli contaminated water is treated successfully using vortex diode. The operating parameters desirable for the disinfection are investigated. The performance is evaluated based on the reduction in the colony forming unit (CFU/mL) of E. coli count estimated by standard spread plate method. The presented results will be useful for identifying appropriate operating conditions for using vortex diode to effectively reduce the bacterial load and disinfect water.1 aGaikwad, V.1 aRanade, V.  uhttps://library.ncl.res.in/content/disinfection-water-using-vortex-diode-hydrodynamic-cavitation-reactor01797nas a2200157   4500008004100000245005900041210005900100260000800159300001200167490000700179520128400186100001601470700001601486700001501502856012201517       2016                        eng d00aEffect of orifice shape on water disinfection efficacy0 aEffect of orifice shape on water disinfection efficacy  cSEP  a765-7710 v353 aHydrodynamic cavitation offers distinct advantages for water disinfection and waste watei treatment particularly at large scales of operations. For applying hydrodynamic cavitation foi water disinfection/treatment, water stream to be treated is passed through a fluidic device ir which there exists a low pressure region. Cavities are generated in this region when the pressurt falls below vapour pressure (in absence of any dissolved gases). These cavities are then collapsec when they travel to regions of higher pressure and lead to very high shear, temperatures anc pressures in localized regions. These high pressure/temperature as well as high shear facilitati disinfection as well as reduction in chemical oxygen demand, colour and amonical nitrogen in the water. In this work, we have investigated hydrodynamic cavitation generated by five difieren orifices have been studied which have different shapes with same fractional open area and have tested their effectiveness for water disinfection. The efficacy of generated cavitation on wate disinfection was quantified based on measurements of non-pathogenic E. coli colony forminj units (CFU/mL). The presented results and analysis will be useful for designing hydrodynamii cavitation based systems for water disinfection1 aGaikwad, V.1 aGaikwad, S.1 aRanade, V.  uhttps://www.scopus.com/record/display.uri?eid=2-s2.0-85019205889&origin=inward&txGid=ce34b9a17392bdd05364dde2f57a1e5202018nas a2200145   4500008004100000245016100041210006900202260000800271520140300279100001501682700001501697700001501712700001701727856012801744       2018                        eng d00aReal-Time monitoring of biopharmaceutical crystallization: chord length distribution to crystal size distribution for lysozyme, rHu insulin, and vitamin B120 aRealTime monitoring of biopharmaceutical crystallization chord l  cDEC3 aThis investigation is focused on designing an effective strategy for the real-time monitoring of biopharmaceutical crystallization using focused beam reflectance measurement (FBRM). Lysozyme, rHu insulin, and vitamin B12 were selected as model biopharmaceutical molecules for the study. Under selected experimental conditions, lysozyme exhibits polymorphism with tetragonal and needle-shaped crystals, rHu insulin forms rhombohedral crystals, and vitamin B12 forms polyhedral-shaped crystals. Focused beam reflectance measurements were performed to obtain the real time chord length distribution (CLD) of crystals obtained using static and dynamic conditions. Mathematical models were developed for converting CLD data obtained using FBRM measurements into the useful crystal size distribution (CSD) data for low (tetragonal, rhombohedral and polyhedral) and high aspect ratio crystals (needle). For high-aspect-ratio crystals, both width-based and length-based models were developed for capturing the CSD. The model validation was performed by comparing the model CSD with the CSD obtained using microscopic image analysis. Developed models effectively capture the CSD for variable shape crystals of lysozyme, rHu insulin, and vitamin B12. It was demonstrated that in the case of high-aspect-ratio crystals, there is an intrinsic limitation in using FBRM for length-based crystal size measurement.1 aPandit, A.1 aKatkar, V.1 aRanade, V.1 aBhambure, R.  uhttps://library.ncl.res.in/content/real-time-monitoring-biopharmaceutical-crystallization-chord-length-distribution-crystal02328nas a2200157   4500008004100000245006600041210006600107260000800173300003200181490000800213520181200221100001302033700001402046700001502060856009502075       2019                        eng d00aKinetics of cinnamaldehyde hydrogenation in four phase system0 aKinetics of cinnamaldehyde hydrogenation in four phase system  cDEC  aArticle Number: UNSP 1205120 v3773 a<p>The kinetics of cinnamaldehyde hydrogenation in four phase system viz. gas (hydrogen)-liquid (cinnamaldehyde + toluene)-liquid (aqueous KOH)-solid (catalyst, 5% Pt/C), [GLLS] system has been studied in this work. As reported, addition of aqueous alkali in hydrogenation of unsaturated aldehydes like cinnamaldehyde shifts selectivity towards unsaturated alcohol, cinnamyl alcohol. The promotion action by alkali metals for improving selectivity towards cinnamyl alcohol involves changes in the adsorption mechanism of the cinnamaldehyde in a way that CO bond get preferentially hydrogenated. In cinnamaldehyde hydrogenation in presence of promoters two different catalytic sites can be considered, each for CO and CC bond hydrogenation. In accordance with this consideration and as demonstrated in various studies on hydrogenation of unsaturated aldehydes, further hydrogenation of intermediate-cinnamyl alcohol (CC bond hydrogenation) occurs on Pt only sites while cinnamaldehyde and intermediate hydrocinnamaldehyde (both involving CO bond hydrogenation) are hydrogenated on catalytic sites affected by promoters. This preferential adsorption and hydrogenation through CO bond leads to the increased selectivity of cinnamyl alcohol. Although, many authors have studied cinnamaldehyde hydrogenation using various promoters, there are very few reports on kinetics in which this two site approach behind promotion action has been considered. The effect of various operating parameters on the rates of hydrogenation was studied and the two site Langmuir-Hinshelwood type of kinetic model was used for evaluating the kinetic parameters by fitting experimental data. The thermodynamic model for estimating the solubility of hydrogen in the reaction mixture was incorporated with this kinetic model.</p>
1 aKhan, M.1 aJoshi, S.1 aRanade, V.  uhttps://library.ncl.res.in/content/kinetics-cinnamaldehyde-hydrogenation-four-phase-system