Reactive Crystallization of Calcium Oxalate: Population Balance Modeling

Reactive crystallization of calcium oxalate has been studied to determine particle size distribution for calcium oxalate precipitation using population balance model with method of moments. The model is formulated and tested for single feed semi-batch reactive crystallization of calcium oxalate with reactants calcium chloride and sodium oxalate with literature data. The simulated results include local supersaturation distribution, number of particle distribution, mass of particle crystallized, particle size, nucleation and growth rate during the process. The model results are in good agreement with available experimental data from literature. This work is licensed under a Creative Commons Attribution 4.0 International License

Marketing Strategies Adopted by Software Companies in Vidharbha Region: A Review

Business organizations are constantly seeking ways to enhance their performances in order to compete actively and aggressively in the market. Profit-seeking organizations have long recognized the importance of creating value in the products and services they offer to the customers, all in the common objective to deliver commercial goods efficiently in order to keep the current customer-base satisfied. Aside from inculcating loyalty among the members of the clients and customers of a business organization, companies are likewise aware of the need to widen and extend the reach of the company’s products and services to new markets in order to increase its share on clients and customers. Marketing strategy has been a salient focus of academic inquiry since the 1980s. There are numerous definitions of marketing strategy in the literature and such definitions reflect different perspectives. The prime aim of this research is to Study the Marketing Strategies adopted by Software Companies in Vidharbha Region

Reactive Separation of Gallic Acid: Experimentation and Optimization Using Response Surface Methodology and Artificial Neural Network

Gallic acid is a major phenolic pollutant present in the wastewater generated from cork boiling, olive mill, and pharmaceutical industries. Experimental and statistical modelling using response surface methodology (RSM) and artificial neural network (ANN) were carried out for reactive separation of gallic acid from aqueous stream using tri-nbutyl phosphate (TBP) in hexanol. TBP has a more significant effect on extraction efficiency as compared to temperature and pH. The optimum conditions of 2.34 g L–1, 65.65 % v/v, 19 oC, and 1.8 of initial concentration of gallic acid, concentration of TBP, temperature, and pH, respectively, were obtained using RSM. Under optimum conditions, extraction efficiency of 99.45 % was obtained for gallic acid. The ANN and RSM results were compared with experimental unseen data. Error analysis suggested the better performance of ANN for extraction efficiency predictions

A study of Marketing Strategies Adopted by Software Companies in Vidharbha Region

In the current dynamic business environment, there is a growing quest for enhancing the business performance by the Business organizations to remain active and competitive in market. In this quest, even profit-seeking companies have recognized the importance of Value Addition in their offerings to customers to enhance their Customer Satisfaction and Customer Retention. Besides retaining the existing customers, even the importance of extending and widening the customer base, is being felt by the business organizations. Companies marketing strategy plays a vital role in this. Emerging new technologies and social media also influence the way companies do their marketing today. Different perspectives and definitions of marketing strategies are reflected in various literatures. The primary aim of this research paper is to “Study the Marketing Strategies adopted by Software Companies in Vidharbha Region”

Sixty Years of Feynman’s Prophecy

30-33The rapid and continuous growth of nanotechnology today was rightly predicted by Richard Feynman 60 years back

QSAR studies of phthalazinones: novel inhibitors of poly (ADP-ribose) polymerase

Over activation of poly (ADP-ribose) polymerase has been involved in the pathogenesis of several diseases including stroke, myocardial infarction, diabetes, shock, neurodegenerative disorder, allergy, and several other inflammatory processes. Owing to the dual response of PARP-1 to DNA damage and its involvement in cell death, pharmacological modulation of PARP-1 activity may constitute a useful tool to increase the activity of DNA-binding antitumor drugs. Quantitative structure activity relationship (QSAR) study vis-á-vis physicochemical parameters and forward feed neural network analysis for a series of phthalazinone derivatives as potent inhibitors of poly (ADP-ribose) polymerase was performed. The result of QSAR studies obtained allows us to recognize such physico-chemical parameters of phthalazinone derivatives which can be strictly related to the PARP- 1 inhibitory activity

The effect of vessel diameter on time dependent gas hold-up variations in highly viscous impeller agitated liquids

Time dependent gas hold-up generated in the 0.3 and 0.6 m diameter vessels using high viscosity castor oil and carboxy methyl cellulose (CMC) solution was compared on the basis of impeller speed (N) and gas velocity (V-G). Two types of hold-up were distinguished-the hold-up due to tiny bubbles (epsilon(ft)) and total hold-up (epsilon(f)), which included large and tiny bubbles. It was noted that vessel diameter (i.e. the scale of operation) significantly influences (i) the trends and the values of epsilon(f) and epsilon(ft), and (ii) the values of tau (a constant reflecting the time dependency of hold-up). The results showed that a scale independent correlation for gas hold-up of the form epsilon(f) or epsilon(ft) = A(N or P-G/V)(a) (V-G)(b), where "a" and "b" are positive constants is not appropriate for viscous liquids. This warrants further investigations into the effect of vessel diameter on gas hold-up in impeller agitated high viscosity liquids (mu or mu(a) > 0.4 Pa s). (C) 2003 Elsevier B.V. All rights reserved

Critical impeller speed for solid suspension in mechanically agitated three-phase reactors. 1. Experimental part

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