Levente L. Diosady

Levente DiosadyProfessor Emeritus
Ph.D., P.Eng., C.Eng., CFS O.Ont., FCIC, FCIFST, FAOCS, FCAE, FIAFoST, FRSC, Professor of Food Engineering

Room: WB257 | Tel.: 416-978-4137 | Email: l.diosady@utoronto.ca

Principal Investigator, Food engineering laboratory and BioZone: Centre for Applied Bioscience and Bioengineering

Awards

  • Fellow of the International Academy of Food Science and Technology, 2012
  • Fellow of the American Oil Chemists’ Society, 2011
  • Fellow of the Canadian Institute of Food Science and Technology, 2009
  • Fellow of the Hungarian Academy of Engineering, 2009
  • Fellow of the Canadian Academy of Engineering, 2008
  • Fellow of the Chemical Institute of Canada, 1992
  • Queen’s Diamond Jubilee Medal, 2012
  • Babcock Hart Award of the Institute of Food Technologists and ILSI – To honor an IFT member who has attained distinction by contributions to food technology which result in improved public health through nutrition or more nutritious food, 2010
  • Elected to the Order of Ontario, 2010
  • K.Y. Lo Medal of the Engineering Institute of Canada, for significant engineering contributions at the international level, 2010
  • J. W. Eva Award for “outstanding service to the Canadian Institute of Food science and Technology through research and service”, 2007
  • Rakoczi Award for Hungarian education, 2006
    Archer Daniels Midland award of the American Oil Chemists’ Society for best paper published in processing,2006
  • Szent Laszlo Rend for Hungarian education, 2004
  • Elected to University of Toronto Engineering Alumni Hall of Distinction, 2004
    Distinguished Alumnae, University of Toronto Alumni, Department of Chemical Engineering and Applied Chemistry, 2004
  • Engineering Medal, Association of Professional Engineers of Ontario, for Research and Development, 2003
  • Top Ten Novel Products/Processes – Institute of Food Technology, 1989
  • Canada Award for Business Excellence, Inventions Category, through Innovations Foundation, University of Toronto), 1987

Memberships

Professional Engineers of Ontario
Canadian Institute of Food Science and Technology
Institute of Food Technology
American Oil Chemists’ Society
Canadian Society for Chemical Engineering
Chemical Institute of Canada
Hungarian-Canadian Engineers’ Association

Research Interests

Food Engineering

Food engineering applies the principles of chemical engineering and food chemistry to the large-scale processing of food. Foods must be nutritious, i.e., provide the essential nutrients for growth and health; they must be safe, free from dangerous micro-organisms and chemical contaminants; and, if they are to be consumed at all, they must be attractive in taste and appearance. Food engineers adapt the unit operations of traditional chemical engineering to the specific requirements of food processing. The aim of the food engineering program is to make it possible for well-trained chemical engineers to work in the food industry, the largest secondary manufacturing industry in Canada, with less on-the-job training and adaptation than is now required.

Fortified salt

One third of the world’s population is suffering from inadequate intake of micronutrients, which interferes with physical and mental development of children, results in reduced immunity to disease, reduced work capacity, increased blindness and mortality especially among women and children. We work with the Micronutrient Initiative and the Program for Appropriate Technologies for Health(PATH) in developing technologies for the introduction of micronutrients into food, for the prevention of micronutrient deficiency diseases. We have developed technology for the simultaneous fortification of salt with iron and iodine.  The process has been pilot tested in India, where more than 1 million children have been cured of anemia by school lunches cooked with double fortified salt. We are working on the triple fortification with iodine and iron in combination with folic acid, zinc or Vitamin A. We received a major grant from the Grand Challenges Canada, Saving Lives at Birth program for iron fortification of tea. The current research is focused on microencapsulation for the stabilization and controlled delivery of micronutrients and nutraceuticals for improving the nutritional value of foods in both the developing world and in Canada.

The second major research area is processing of vegetable oils. There is inevitable conflict between the use of agricultural products for food or fuel, and I consider it unethical to divert the supply of staple foods to fuel, when there is a real need for food in most of the world. My students and I developed a process for production of protein isolates from canola, rapeseed and mustard seed. These isolates have excellent food functionality and can replace expensive meat proteins in many processed foods. We are working on developing processes that will recover food grade protein, and high quality biodiesel from a number of oilseeds and algae, thus contributing both fuel and food from crops that are now unused, or have marginal utility. Our membrane-based processes offer an opportunity to recover minor components with nutraceutical or cancer preventative value from these oil sources.

Fats containing trans double bonds contribute to cardiovascular disease. We are developing novel catalytic processes that minimize the formation of trans double bonds but retain the desirable characteristics in the oil. Work on catalyst immobilization and investigation of homogeneous-heterogeneous mixed catalyst systems continues.

We are continuing the development of multi-component low nitrite, or nitrite free meat curing systems that reproduce the colour, flavour and oxidative stability of cured meat without the formation of carcinogenic nitrosamines.

A number of modern chemical engineering unit operations have special applications in food processing. While we have focused on using our expertise in membrane processes, we have worked with industrial partners in the monitoring, control and modeling of extrusion in systems including multiple-fortified, reconstituted rice grains.

Research programs leading to the Ph.D., M.A.Sc., and M.Eng. degrees are open to graduates in chemical engineering, food science, chemistry, and biochemistry.

Selected Publications

M.G. Venkatesh Mannar and L.L. Diosady “ Vitamin A fortification of oil” Chapter 22. Handbook of Food Fortification and Health – From concepts to public health applications Volume 1, Victor R. Preedy, R. Srirajaskanthan and V.B.Patel Ed. Springer Verlag London p. 275-292

Tabtabaei, S., V.M. Ataya Pulido and L.L. Diosady (2013). “Destabilization of Yellow Mustard Emulsion using Organic Solvents.” J Am Oil Chem Soc 90(5): 707-716

Tabtabaei, S., D.G.B. Boocock, and L.L. Diosady (2014). “The Production of Biodiesel Feedstock from Emulsions Produced by Aqueous Processing of Yellow Mustard.” J Am Oil Chem Soc, 91(7) 1268-82 (2014)

Li, O.Y., Dueik, V. and Diosady, L.L Microencapsulation of Vitamins, Minerals, and Nutraceuticals for Food Applications Microencapsulation in the Food Industry: A Practical Implementation Guide submitted Gaonkar Anilkumar Ed. Elsevier, 2013

Prapakornwiriya, N. and Diosady, L.L. Application of ion-exchange chromatography for purifiying sinapic acid from waste effluent of mustard protein isolation, J.Am.Oil Chem.Soc accepted Sept 30 2013

Li, Y.O., Dueik Gonzales V.P. and Diosady, L.L. Microencapsulation of Vitamins, Minerals, and Nutraceuticals for Food – Chapter 39 – A.G Gaonkar, N. Vasisht, A.R. Khare, R. Sobel (Eds): Microencapsulation in the Food Industry.