My research activity focuses on applying mathematical modeling in chemical, biochemical and biological engineering, closing the gap between models and reality through regression analysis.
We present a new hybrid technique aimed to model the floc formation, growth and divers distributi... more We present a new hybrid technique aimed to model the floc formation, growth and divers distribution. Our approach is adapted from individual based modeling concepts, using the notion of fundamental building bloc the grid cell, defined as the lowest volume/surface of the ...
SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings
Fish oils with a high content of polyunsaturated fatty acids (PUFAs) are gaining increasing inter... more Fish oils with a high content of polyunsaturated fatty acids (PUFAs) are gaining increasing interest in the food and nutraceutical industry, due to their important functional properties for human beings� health improvement. The most important PUFAs have at least two double bonds placed on the carbon chain. These include ?-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahaxaneoic acid (DHA). Microencapsulation is a technique used to protect the bioactive compounds from oxidative damage, to ensure their controlled release and to activate the synergistic effect of the ingredients, if it exists. In this context, the microencapsulation process of fish oils rich in PUFAs using alginate was studied, in the presence and the absence of an ultrasonic (US) field. Both BoxBehnken design of experiment technique and the Response Surface Method were used, to investigate the influence of the process parameters and to optimize the operating conditions. The operating parameters under inve...
Calcium alginate (CaAlg) beads were prepared using ultrasound for use in the removal of lead from... more Calcium alginate (CaAlg) beads were prepared using ultrasound for use in the removal of lead from natural and wastewaters by ion exchange. Ultrasound was applied in a batch mode with an ultrasonic bath or in a flow mode using an ultrasonic clamp-on device. For comparison purposes the synthesis was performed in batch mode in the absence of the ultrasound. The beads prepared using ultrasound showed a greater ion exchange capability which could be ascribed to a larger specific surface area as a result of surface roughening induced by cavitation. Scanning Electron Microscopy (SEM) images revealed that the roughening was in the form of corrugation for the product with the best ion exchange capability obtained in the flow process where preformed CaAlg droplets were subjected to ultrasound during the setting process. These beads performed 11% better for lead removal than those synthesized in the absence of ultrasound.
We present a new hybrid technique aimed to model the floc formation, growth and divers distributi... more We present a new hybrid technique aimed to model the floc formation, growth and divers distribution. Our approach is adapted from individual based modeling concepts, using the notion of fundamental building bloc the grid cell, defined as the lowest volume/surface of the ...
SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings
Fish oils with a high content of polyunsaturated fatty acids (PUFAs) are gaining increasing inter... more Fish oils with a high content of polyunsaturated fatty acids (PUFAs) are gaining increasing interest in the food and nutraceutical industry, due to their important functional properties for human beings� health improvement. The most important PUFAs have at least two double bonds placed on the carbon chain. These include ?-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahaxaneoic acid (DHA). Microencapsulation is a technique used to protect the bioactive compounds from oxidative damage, to ensure their controlled release and to activate the synergistic effect of the ingredients, if it exists. In this context, the microencapsulation process of fish oils rich in PUFAs using alginate was studied, in the presence and the absence of an ultrasonic (US) field. Both BoxBehnken design of experiment technique and the Response Surface Method were used, to investigate the influence of the process parameters and to optimize the operating conditions. The operating parameters under inve...
Calcium alginate (CaAlg) beads were prepared using ultrasound for use in the removal of lead from... more Calcium alginate (CaAlg) beads were prepared using ultrasound for use in the removal of lead from natural and wastewaters by ion exchange. Ultrasound was applied in a batch mode with an ultrasonic bath or in a flow mode using an ultrasonic clamp-on device. For comparison purposes the synthesis was performed in batch mode in the absence of the ultrasound. The beads prepared using ultrasound showed a greater ion exchange capability which could be ascribed to a larger specific surface area as a result of surface roughening induced by cavitation. Scanning Electron Microscopy (SEM) images revealed that the roughening was in the form of corrugation for the product with the best ion exchange capability obtained in the flow process where preformed CaAlg droplets were subjected to ultrasound during the setting process. These beads performed 11% better for lead removal than those synthesized in the absence of ultrasound.
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Papers by Vasile Lavric