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Professor Indrawati Oey

Head of Department,
Professor

PhD (Leuven), MSc (Leuven), BSc (Bogor)

Indrawati Oey

Contact

Tel 479 8735 Ext 8735
Email indrawati.oey@otago.ac.nz
Office Hours 9am- 5pm (Mon-Fri)
Location Gregory 305

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About

Indra is the Food Science Head of Department. She is also actively involved in the teaching and supervising of our students.

Her research focuses on the development of smart processing strategies using conventional and advanced food technologies to create healthier food products with unique sensory characteristics. Understanding mechanisms and kinetics of enzymatic and chemical reactions during processing and shelf life is a pre-requisite to assure the quality of food products. Also understanding consumer perception and acceptance of food products and processing technologies used are essential to achieve sustainable production and marketability of food products.

Indra is a Professional member of the Institute of Food Technologists (IFT), United States and a Fellow at the New Zealand Institute of Food Science and Technology. She had been internationally elected as a member-at-large of the Executive Committee Board of Non-thermal Processing Division at the Institute of Food Technologists (IFT), United States (2012-2015). She was the Chair of Training and Development for European Project funded NovelQ project (2005-2008) and Secretary of the Otago/Southland Branch New Zealand Institute of Food Science and Technology (2012-2015). She is currently a Principal Investigator of the Riddet Institute CoRE.

Professor Oey is also a member of Food Waste Innovation, a University of Otago Research Theme which measures food waste, develops reduction strategies, applies innovative technology, and works to modify producer and consumer behaviour.

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Teaching

Course Co-ordinator

Contributor to

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Research

Research interests

  • Food enzymes
  • Conventional and advanced thermal food processing technologies
  • Non-thermal food processing technologies e.g. high (hydrostatic) pressure, pulsed electric field, cold plasma, pulsed light.
  • Kinetic modeling and process impact assessment
  • Postharvest Innovation
  • Bioavailability and bioactivity of secondary metabolites
  • Consumer perception
  • Technology transfer and dissemination to industrial food applications

Research Projects

  • 2015 – 2021 Theme Leader for “Adding Value to Primary Products” for Ag@Otago Research Theme, University of Otago.
  • 2015 – 2021 Research grant: MBIE funding for “Food Industry Enabling Technology” FIET Project. Hosted by Massey University. Six institutions involved, UoO, Auckland University, Massey University, Plant and Food Research, AgResearch and Riddet Institute.
  • 2015 – 2018 Research grant: CaRED programme funded by New Zealand Ministry of Foreign Affair and Trade on “Women Empowerment through Sustainable Fisheries Products Development in Timor District of East Nusa Tenggara”. Collaboration between University of Gadjah Madha, Indonesia and Department of Food Science, University of Otago. Website: http://oia.ugm.ac.id/about-cared/.
  • 2015 – 2018 Research grant: Zespri Innovation on Understanding the impacts of plant nutrition on the storage potential of Gold3 kiwifruit (Project number FP1615). Collaboration with Assoc. Prof. Burritt (Botany).
  • 2015 - 2016 Research grant: Cresswell Jackson New Zealand Wine Trust grant for study on the effect of leave plugging and PEF treatment on red and white wine grapes. Collaboration with Assoc. Prof. Burritt (Botany) and Assoc. Prof. Hoffman (Lincoln University).
  • 2013 - 2015 NZ-Germany Science & Technology Programme : “Smart food production through non-thermal processing of NZ fruit and vegetables”. Royal Society. Contract no. FRG13-10.
  • 2014 NZ-China Science & Technology Programme: Novel Technologies for Food Safety. MBIE.
  • 2014 - 2016 COST Action TD 1104: European network for development of electroporation-based technologies and treatments (EP4Bio2Med).
  • 2011 International Relation Funding for US-NZ Science and Technology Workshop for “Postharvest Innovation”, Ministry of Science and Innovation, New Zealand , Contract no: 57712.

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Postgraduate Supervision

Supervision topics

Please contact me for a list of topics or to discuss your ideas.

Current students

Amali Alahakoon (PhD), "Feasibility study of using pulsed electric field as a pretreatment to improve textural and other quality traits of sous vide meat."

Nusyana Cham Pi (PhD, Botany), "Understanding the impacts of plant nutrition on the storage potential of Gold3 kiwifruit."

Sheba Mae Duque (PhD), "Understanding the effects of pulsed electric field on oat (Avena sativa) properties."

Stephen Giteru (PhD). “Characterization of kafirin-polysaccharide edible coatings for delivery of bioactive compounds in spray coating food applications.”

Tingting (Lily) Liu (PhD), "The effect of PEF processing on plant structure."

Yafei Liu (PhD), "Effect of pulsed electric protein on protein based food products"

Hajar Mohamad (PhD), "Perceptions of weaning foods during pregnancy and after birth. A cross-cultural study of first time mothers."

Rajkumar Nandakumar (PhD), "Understanding the effect of Pulsed Electric Field treatment on secondary metabolite production in Allium cepa L. suspension cultures."

Claudia Philipp (PhD), "Physicochemical behaviour of starch-protein mixtures during low-moisture extrusion."

Abduh Setya (PhD), "Employment of Pulse Electric Field on the extraction of Polysaccharide from plant origin material"

Aswathi Soni (PhD), "Control of Bacillus spores in food."

Previous Students

Vidya Kethireddy (PhD), "Effect of pulsed electric field processing on yeast and wine production."

Pui Yee Lee (PhD 2015), "Chinese consumer perception on high hydrostatic pressure treated products."

Sze Ying Leong (PhD 2016), "Effect of pulsed electric field on release of phtochemicals from plant materials."

Farnaz Faridnia (PhD 2015), "Effect of pulsed electric field on meat and plant structure and quality."

Shahin Roohinejad (PhD 2014), "Development of stable and transparent microemulsion to extract bioacyibes from pulsed-electric field treated carrots."

Natasha Rodriquez (MSc - Human Nutrition), "Examining the health implications and substantiation of a health claim permitted by EFSA relating to the replacement of sucrose with fructose in commercially manufactured foods and beverages."

Pankaj Sharma (PhD 2014), "Structural and functional changes in the milk fat globule induced by heat and pulsed electric field treatment."

Raseetha Vani Siva Manikam (PhD 2013), "Feasibility of using combined proton transfer reaction mass spectrometry (PTR-MS) technique and biochemical analysis to assess the quality of broccoli florets during postharvest storage and minimal processing."

Kathryn Bradbury/Hunt (PhD 2012), "Monitoring the impact of a voluntary bread folic acid fortification programme on the folate status of New Zealand women of childbearing age."

International collaboration: Jomo Kenyatta University of Agriculture and Technology, Kenya.
Michael Maero Wawire (PhD 2013), "Optimization of nutritional and quality properties of African cowpea leaves (Vigna unguiculata) and other traditional African vegetables from farm to fork."

Fiona Zhang (MSc 2015) "Understanding Chinese consumer’s perception of freshness in orange juice."

Marcus Doo (Dafu Du) (MSc 2013) " Effect of pulsed electric field on carrots texture."

Sasha (Alexandra) Rozhkova (MSc - Botnay 2017), "Influence of field management and Pulsed Electric Field on the quality of New Zealand wine."

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Publications

Ma, Q., Hamid, N., Oey, I., Kantono, K., & Farouk, M. (2020). The impact of high-pressure processing on physicochemical properties and sensory characteristics of three different lamb meat cuts. Molecules, 25(11), 2665. doi: 10.3390/molecules25112665

Duque, S. M. M., Leong, S. Y., Agyei, D., Singh, J., Larsen, N., & Oey, I. (2020). Modifications in the physicochemical properties of flour “fractions” after Pulsed Electric Fields treatment of thermally processed oat. Innovative Food Science & Emerging Technologies. Advance online publication. doi: 10.1016/j.ifset.2020.102406

Leong, S. Y., Treadwell, M., Liu, T., Hochberg, M., Sack, M., Mueller, G., … Silcock, P., & Oey, I. (2020). Influence of Pulsed Electric Fields processing at high-intensity electric field strength on the relationship between anthocyanins composition and colour intensity of Merlot (Vitis vinifera L.) musts during cold maceration. Innovative Food Science & Emerging Technologies, 59, 102243. doi: 10.1016/j.ifset.2019.102243

Arcena, M. R., Kebede, B., Leong, S. Y., Silcock, P., & Oey, I. (2020). Feasibility of using integrated fingerprinting, profiling and chemometrics approach to understand (bio) chemical changes throughout commercial red winemaking: A case study on Merlot. Food Research International, 127, 108767. doi: 10.1016/j.foodres.2019.108767

Nanashima, N., Horie, K., Yamanouchi, K., Tomisawa, T., Kitajima, M., Oey, I., & Maeda, H. (2020). Blackcurrant (Ribes nigrum) extract prevents dyslipidemia and hepatic steatosis in ovariectomized rats. Nutrients, 12(5), 1541. doi: 10.3390/nu12051541

Edited Book - Research

Roohinejad, S., Greiner, R., Oey, I., & Wen, J. (Eds.). (2018). Emulsion-based systems for delivery of food active compounds: Formation, application, health and safety. Hoboken, NJ: Wiley, 294p. doi: 10.1002/9781119247159

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Chapter in Book - Research

Agyei, D., Akanbi, T. O., & Oey, I. (2019). Enzymes for use in functional foods. In M. Kuddus (Ed.), Enzymes in food biotechnology: Production, applications, and future prospects. (pp. 129-147). London, UK: Academic Press. doi: 10.1016/B978-0-12-813280-7.00009-8

Leong, S. Y., Duque, S. M., Abduh, S. B. M., & Oey, I. (2019). Carbohydrates. In F. J. Barba, J. M. A. Saraiva, G. Cravotto & J. M. Lorenzo (Eds.), Innovative thermal and non-thermal processing, bioaccessibility and bioavailability of nutrients and bioactive compounds. (pp. 171-206). Duxford, UK: Woodhead Publishing. doi: 10.1016/B978-0-12-814174-8.00006-8

Smetana, S., Terjung, N., Aganovic, K., Alahakoon, A. U., Oey, I., & Heinz, V. (2019). Emerging technologies of meat processing. In C. M. Galanakis (Ed.), Sustainable meat production and processing. (pp. 181-205). London, UK: Academic Press. doi: 10.1016/B978-0-12-814874-7.00010-9

Leong, S. Y., & Oey, I. (2018). Pulsed electric fields processing of plant-based foods: An overview. In G. Smithers (Ed.), Reference module in food science. Elsevier. doi: 10.1016/B978-0-08-100596-5.21653-3

Leong, S. Y., Burritt, D. J., & Oey, I. (2018). Utilising pulsed electric fields processing to modify the characteristics of plant-based foods. In G. Smithers (Ed.), Reference module in food science. Elsevier. doi: 10.1016/B978-0-08-100596-5.21347-4

Roohinejad, S., Oey, I., Everett, D. W., & Greiner, R. (2018). Microemulsions. In S. Roohinejad, R. Greiner, I. Oey & J. Wen (Eds.), Emulsion-based systems for delivery of food active compounds: Formation, application, health and safety. (pp. 231-262). Hoboken, NJ: John Wiley & Sons. doi: 10.1002/9781119247159.ch9

Oey, I., Faridnia, F., Roohinejad, S., Leong, S. Y., Lee, P. Y., & Kethireddy, V. (2017). High hydrostatic pressure processing at high temperature: Impact on quality attributes and future outlook from consumers' perspective. In A. K. Jaiswal (Ed.), Food processing technologies: Impact on product attributes. (pp. 309-372). Boca Raton, FL: CRC Press.

Leong, S. Y., & Oey, I. (2017). Measures of food quality. In G. W. Smithers (Ed.), Reference module in food science. Elsevier. doi: 10.1016/B978-0-08-100596-5.21140-2

Oey, I., Roohinejad, S., Leong, S. Y., Faridnia, F., Lee, P. Y., & Kethireddy, V. (2017). Pulsed electric field processing: Its technological opportunities and consumer perception. In A. K. Jaiswal (Ed.), Food processing technologies: Impact on product attributes. (pp. 447-516). Boca Raton, FL: CRC Press.

Poojary, M. M., Roohinejad, S., Barba, F. J., Koubaa, M., Puértolas, E., Jambrak, A. R., … Oey, I. (2017). Application of pulsed electric field treatment for food waste recovery operations. In D. Miklavcic (Ed.), Handbook of electroporation. Cham, Switzerland: Springer.

Leong, S. Y., Liu, T., Oey, I., & Burritt, D. J. (2017). Ascorbic acid in processed plant-based foods. In M. A. Hossain, S. Munné-Bosch, D. J. Burritt, P. Diaz-Vivancos, M. Fujita & A. Lorence (Eds.), Ascorbic acid in plant growth, development and stress tolerance. (pp. 431-469). Cham, Switzerland: Springer. doi: 10.1007/978-3-319-74057-7_17

Rashidinejad, A., Bremer, P., Birch, J., & Oey, I. (2017). Nutrients in cheese and their effect on health and disease. In R. R. Watson, R. J. Collier & V. R. Preedy (Eds.), Nutrients in dairy and their implications for health and disease. (pp. 177-192). London, UK: Academic Press.

Leong, S. Y., & Oey, I. (2017). Berry juices. In I. Aguiló-Aguayo & L. Plaza (Eds.), Innovative technologies in beverage processing. (pp. 131-203). John Wiley & Sons.

Oey, I. (2016). Effects of high pressure on enzymes. In V. M. Balasubramaniam, G. V. Barbosa-Cánovas & H. L. M. Lelieveld (Eds.), High pressure processing of food: Principles, technology and applications. (pp. 391-431). New York: Springer. doi: 10.1007/978-1-4939-3234-4_19

Alahakoon, A. U., Faridnia, F., Bremer, P. J., Silcock, P., & Oey, I. (2016). Pulsed electric fields effects on meat tissue quality and functionality. In D. Miklavcic (Ed.), Handbook of electroporation. Springer. doi: 10.1007/978-3-319-26779-1_179-1

Oey, I., Faridnia, F., Leong, S. Y., Burritt, D. J., & Liu, T. (2016). Determination of pulsed electric fields effects on the structure of potato tubers. In D. Miklavcic (Ed.), Handbook of electroporation. Springer. doi: 10.1007/978-3-319-26779-1_151-1

Poojary, M. M., Roohinejad, S., Koubaa, M., Barba, F. J., Passamonti, P., Jambrak, A. R., Oey, I., & Greiner, R. (2016). Impact of pulsed electric fields on enzymes. In D. Miklavcic (Ed.), Handbook of electroporation. Springer. doi: 10.1007/978-3-319-26779-1_173-1

Bekhit, A. E.-D., & Oey, I. (2012). Kiwifruit. In M. Siddiq (Ed.), Tropical and subtropical fruits: Postharvest physiology, processing and packaging. (pp. 479-502). Ames, IA: Wiley-Blackwell.

Oey, I. (2010). Effect of novel food processing on fruit and vegetable enzymes. In A. Bayindirli (Ed.), Enzymes in fruit and vegetable processing: Chemistry and engineering applications. (pp. 245-312). Boca Raton, FL: CRC Press. doi: 10.1201/9781420094343-c10

Oey, I., Duvetter, T., Sila, D. N., van Eyelen, D., Van Loey, A., & Hendrickx, M. (2008). High pressure processing to optimise the quality of in-pack processed fruit and vegetables. In P. Richardson (Ed.), In-pack processed foods: Improving quality. (pp. 338-357). Cambridge, UK: Woodhead.

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Chapter in Book - Other

Roohinejad, S., Greiner, R., Oey, I., & Wen, J. (2018). Preface. In S. Roohinejad, R. Greiner, I. Oey & J. Wen (Eds.), Emulsion-based systems for delivery of food active compounds: Formation, application, health and safety. (pp. vii). Hoboken, NJ: Wiley. doi: 10.1002/9781119247159

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Journal - Research Article

Ma, Q., Hamid, N., Oey, I., Kantono, K., & Farouk, M. (2020). The impact of high-pressure processing on physicochemical properties and sensory characteristics of three different lamb meat cuts. Molecules, 25(11), 2665. doi: 10.3390/molecules25112665

Nanashima, N., Horie, K., Yamanouchi, K., Tomisawa, T., Kitajima, M., Oey, I., & Maeda, H. (2020). Blackcurrant (Ribes nigrum) extract prevents dyslipidemia and hepatic steatosis in ovariectomized rats. Nutrients, 12(5), 1541. doi: 10.3390/nu12051541

Arcena, M. R., Kebede, B., Leong, S. Y., Silcock, P., & Oey, I. (2020). Feasibility of using integrated fingerprinting, profiling and chemometrics approach to understand (bio) chemical changes throughout commercial red winemaking: A case study on Merlot. Food Research International, 127, 108767. doi: 10.1016/j.foodres.2019.108767

Leong, S. Y., Treadwell, M., Liu, T., Hochberg, M., Sack, M., Mueller, G., … Silcock, P., & Oey, I. (2020). Influence of Pulsed Electric Fields processing at high-intensity electric field strength on the relationship between anthocyanins composition and colour intensity of Merlot (Vitis vinifera L.) musts during cold maceration. Innovative Food Science & Emerging Technologies, 59, 102243. doi: 10.1016/j.ifset.2019.102243

Duque, S. M. M., Leong, S. Y., Agyei, D., Singh, J., Larsen, N., & Oey, I. (2020). Modifications in the physicochemical properties of flour “fractions” after Pulsed Electric Fields treatment of thermally processed oat. Innovative Food Science & Emerging Technologies. Advance online publication. doi: 10.1016/j.ifset.2020.102406

Do, D. T., Singh, J., Oey, I., Singh, H., Yada, R. Y., & Frostad, J. M. (2020). A novel apparatus for time-lapse optical microscopy of gelatinisation and digestion of starch inside plant cells. Food Hydrocolloids, 104, 105551. doi: 10.1016/j.foodhyd.2019.105551

Giteru, S. G., Cridge, B., Oey, I., Ali, A., & Altermann, E. (2020). In-vitro degradation and toxicological assessment of pulsed electric fields crosslinked zein-chitosan-poly(vinyl alcohol) biopolymeric films. Food & Chemical Toxicology, 135, 111048. doi: 10.1016/j.fct.2019.111048

Cahayadi, J., Leong, S. Y., Oey, I., & Peng, M. (2020). Textural effects on perceived satiation and ad libitum intake of potato chips in males and females. Foods, 9(1), 85. doi: 10.3390/foods9010085

McIntyre, S. M., Ma, Q., Burritt, D. J., Oey, I., Gordon, K. C., & Fraser-Miller, S. J. (2020). Vibrational spectroscopy and chemometrics for quantifying key bioactive components of various plum cultivars grown in New Zealand. Journal of Raman Spectroscopy. Advance online publication. doi: 10.1002/jrs.5867

Kebede, B., Ting, V., Eyres, G., & Oey, I. (2020). Volatile changes during storage of shelf stable apple juice: Integrating GC-MS fingerprinting and chemometrics. Foods, 9(2), 165. doi: 10.3390/foods9020165

Arcena, M. R., Leong, S. Y., Hochberg, M., Sack, M., Mueller, G., Sigler, J., Silcock, P., Kebede, B., & Oey, I. (2020). Evolution of volatile and phenolic compounds during bottle storage of merlot wines vinified using pulsed electric fields-treated grapes. Foods, 9(4), 443. doi: 10.3390/foods9040443

Do, D. T., Singh, J., Oey, I., & Singh, H. (2020). Isolated potato parenchyma cells: Physico-chemical characteristics and gastro-small intestinal digestion in vitro. Food Hydrocolloids, 108, 105972. doi: 10.1016/j.foodhyd.2020.105972

Soni, A., Oey, I., Silcock, P., Ross, I. K., & Bremer, P. J. (2020). Effect of pulsed electric field with moderate heat (80°C) on inactivation, thermal resistance and differential gene expression in B. cereus spores. Journal of Food Processing & Preservation. Advance online publication. doi: 10.1111/jfpp.14503

Reynolds, A. N., Mann, J., Elbalshy, M., Mete, E., Robinson, C., Oey, I., Silcock, P., Downes, N., Perry, T., & Te Morenga, L. (2020). Wholegrain particle size influences postprandial glycemia in type 2 diabetes: A randomized crossover study comparing four wholegrain breads. Diabetes Care, 43, 476-479. doi: 10.2337/dc19-1466

Duque, S. M. M., Leong, S. Y., Agyei, D., Singh, J., Larsen, N., & Oey, I. (2020). Understanding the impact of Pulsed Electric Fields treatment on the thermal and pasting properties of raw and thermally processed oat flours. Food Research International, 129, 108839. doi: 10.1016/j.foodres.2019.108839

Giteru, S. G., Ali, M. A., & Oey, I. (2020). Optimisation of pulsed electric fields processing parameters for developing biodegradable films using zein, chitosan and poly(vinyl alcohol). Innovative Food Science & Emerging Technologies, 60, 102287. doi: 10.1016/j.ifset.2020.102287

Soni, A., Oey, I., Silcock, P., Permina, E., & Bremer, P. J. (2019). Differential gene expression for investigation of the effect of germinants and heat activation to induce germination in Bacillus cereus spores. Food Research International, 119, 462-468. doi: 10.1016/j.foodres.2018.12.041

Tantamacharik, T., Leong, S. Y., Leus, M. J., Eyres, G. T., Burritt, D. J., & Oey, I. (2019). Structural changes induced by pulsed electric fields increase the concentration of volatiles released in red onion (Allium cepa L. var. Red Pearl) bulbs. Foods, 8(9), 368. doi: 10.3390/foods8090368

Do, D. T., Singh, J., Oey, I., & Singh, H. (2019). Modulating effect of cotyledon cell microstructure on in vitro digestion of starch in legumes. Food Hydrocolloids, 96, 112-122. doi: 10.1016/j.foodhyd.2019.04.063

Soni, A., Oey, I., Silcock, P., Permina, E., & Bremer, P. J. (2019). Effect of cold storage and different ions on the thermal resistance of B. cereus NZAS01 spores: Analysis of differential gene expression and ion exchange. Food Research International, 116, 578-585. doi: 10.1016/j.foodres.2018.08.076

Liu, Y.-F., Oey, I., Bremer, P., Silcock, P., Carne, A., & McConnell, M. (2019). Pulsed electric fields treatment at different pH enhances the antioxidant and anti-inflammatory activity of ovomucin-depleted egg white. Food Chemistry, 276, 164-173. doi: 10.1016/j.foodchem.2018.10.009

Alahakoon, A. U., Oey, I., Bremer, P., & Silcock, P. (2019). Process optimisation of pulsed electric fields pre-treatment to reduce the sous vide processing time of beef briskets. International Journal of Food Science & Technology, 54, 823-834. doi: 10.1111/ijfs.14002

Abduh, S. B. M., Leong, S. Y., Agyei, D., & Oey, I. (2019). Understanding the properties of starch in potatoes (Solanum tuberosum var. Agria) after being treated with pulsed electric field processing. Foods, 8(5), 159. doi: 10.3390/foods8050159

Giteru, S. G., Ali, M. A., & Oey, I. (2019). Solvent strength and biopolymer blending effects on physicochemical properties of zein-chitosan-polyvinyl alcohol composite films. Food Hydrocolloids, 87, 270-286. doi: 10.1016/j.foodhyd.2018.08.006

Mohamad, H., Mirosa, M., Bremer, P., & Oey, I. (2019). A qualitative study of Malaysian parents’ purchase intention of functional weaning foods using the theory of planned behavior. Journal of Food Products Marketing, 25(2), 187-206. doi: 10.1080/10454446.2018.1512919

Liu, T., Burritt, D. J., & Oey, I. (2019). Understanding the effect of pulsed electric fields on multilayered solid plant foods: Bunching onions (Allium fistulosum) as a model system. Food Research International, 120, 560-567. doi: 10.1016/j.foodres.2018.11.006

Luo, Q., Hamid, N., Oey, I., Leong, S. Y., Kantono, K., Alfaro, A., & Lu, J. (2019). Physicochemical changes in New Zealand abalone (Haliotis iris) with varying pulsed electric field (PEF) processing and heat treatments. LWT, 115, 108438. doi: 10.1016/j.lwt.2019.108438

Ji, D., Oey, I., & Agyei, D. (2019). Purification, characterization and thermal inactivation kinetics of β-galactosidase from Lactobacillus leichmannii 313. LWT, 116, 108545. doi: 10.1016/j.lwt.2019.108545

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