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Patrick Silcock


Senior Research Fellow

Manager

Product Development Research Centre

BCApSc (Otago)

Pat Silcock

Contact

Tel 64 3 479 7564 Ext 7564
Email pat.silcock@otago.ac.nz
Location CSB 110

About

Pat is the manager of the Product Development Research Centre (PDRC). The Product Development Research Centre is part of the Department of Food Science at the University of Otago and offers commercially focused research and consultancy services. The Product Development Research Centre undertakes projects with industry (small – medium sized enterprises to multinational companies) and other universities and research institutes that apply food science and related scientific knowledge to enhance their products or processes, and to assist their businesses achieve a competitive edge. The Centre works collaboratively with Food Science academic staff and other staff throughout the University on a project-by-project basis.

Pat has strong links with food companies and companies aligned with the food industry. He has experience working with small to medium-size enterprises, cooperatives and multinational companies, working with companies based in New Zealand, Australia, South East Asia, China, USA and Europe.

His professional specialties are in the area of food chemistry, product development, shelf life extension and calculation, food spoilage and general food consultancy.

Research

Pat's research can be largely categorised into two main themes: food quality, and microbially-induced flavour generation. He is interested in using consumers to define the quality of food and also the relationship between quality, sensory characteristics, manufacturing process and food composition and structure. The microbially induced flavour generation theme examines the role of bacteria, yeast and mould on volatile generation in fermented foods (beer, wine, coffee…) and during food spoilage. Both themes involve the use of volatile characterisation and sensory methodologies to understand changes in the flavour perception of the foods.

Postgraduate Supervision

Pat supervises students in the areas of food quality, flavour science, sensory science and food spoilage

Current Students

Chai Chun (Marcus) Loi (PhD), "Emulsifier technology to enhance emulsion stability in milk coffee beverages."

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

Tobias Richter (PhD), "Hop aroma in beer - changes in the flavour profile associated with different yeast strains

Aswathi Soni (PhD), "Optimisation of technologies for extension of shelf life of liquid egg white."

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

Mina Tirgar (PhD),"A Novel System for Delivery of Encapsulated Flaxseed Oil as a Functional Powder by Spray Drying."

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

Mohsen Zareian (PhD),"Determination of the Volatile Organic Composition of Food Spoilage Bacteria."

Recent Students


Valentina Ting  (PhD 2015), "Real Time Monitoring of Volatile Organic Compound Release in Relation with Textural and Acoustic Characteristics in Apples."

Mario Fernandez Alduenda (PhD 2015), "Development of flavour in natural coffee."

Mohammad Alothman (PhD 2015), "Investigation of the Factors Which Limit the Shelf Life of Fresh Chilled Pasteurized Milk"

Claudia Schueuermann (PhD 2016), "Determination of the sources of compositional variation in Mount Difficulty pinot noir wines – A case study: from grape juice to wine."

Jun Niimi (2013), "Sensory crossmodal interactions in cheese."

Ofir Benjamin (2012), "Volatile release from emulsions"

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Publications

Asaduzzaman, M., Scampicchio, M., Biasioli, F., Bremer, P. J., & Silcock, P. (2019). Methanethiol formation during the photochemical oxidation of methionine‐riboflavin system. Flavour & Fragrance Journal. Advance online publication. doi: 10.1002/ffj.3536

Alahakoon, A. U., Oey, I., Bremer, P., & Silcock, P. (2019). Quality and safety considerations of incorporating post-PEF ageing into the pulsed electric fields and sous vide processing chain. Food & Bioprocess Technology, 12(5), 852-864. doi: 10.1007/s11947-019-02254-6

Zareian, M., Tybussek, T., Silcock, P., Bremer, P., Beauchamp, J., & Böhner, N. (2019). Interrelationship among myoglobin forms, lipid oxidation and protein carbonyls in minced pork packaged under modified atmosphere. Food Packaging & Shelf Life, 20, 100311. doi: 10.1016/j.fpsl.2019.100311

Chiang, J. H., Eyres, G. T., Silcock, P. J., Hardacre, A. K., & Parker, M. E. (2019). Changes in the physicochemical properties and flavour compounds of beef bone hydrolysates after Maillard reaction. Food Research International. Advance online publication. doi: 10.1016/j.foodres.2019.05.024

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

Chapter in Book - Research

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

Niimi, J., Overington, A. R., Silcock, P., Bremer, P. J., & Delahunty, C. M. (2015). Influence of cross-modal sensory interactions on cheese flavour intensity and character. In B. Guthrie, J. Beauchamp, A. Buettner & B. K. Lavine (Eds.), The chemical sensory informatics of food: Measurement, analysis, integration: ACS Symposium Series (Vol. 1191). (pp. 15-25). Washington, DC: American Chemical Society. doi: 10.1021/bk-2015-1191.ch002

Dufour, J.-P., Malcorps, P., & Silcock, P. J. (2003). Control of ester synthesis during brewery fermentation. In K. Smart (Ed.), Brewing yeast fermentation performance. (2nd ed.) (pp. 213-233). Oxford: Blackwell Science.

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Chapter in Book - Other

Han, J., Silcock, P., Bell, M., & Birch, J. (2011). Lipase-catalyzed production of biodiesel from tallow [Reprint from Journal of ASTM International (2010) 7(1). doi: 10.1520/STP49365S

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Journal - Research Article

Asaduzzaman, M., Scampicchio, M., Biasioli, F., Bremer, P. J., & Silcock, P. (2019). Methanethiol formation during the photochemical oxidation of methionine‐riboflavin system. Flavour & Fragrance Journal. Advance online publication. doi: 10.1002/ffj.3536

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

Chiang, J. H., Eyres, G. T., Silcock, P. J., Hardacre, A. K., & Parker, M. E. (2019). Changes in the physicochemical properties and flavour compounds of beef bone hydrolysates after Maillard reaction. Food Research International. Advance online publication. doi: 10.1016/j.foodres.2019.05.024

Zareian, M., Tybussek, T., Silcock, P., Bremer, P., Beauchamp, J., & Böhner, N. (2019). Interrelationship among myoglobin forms, lipid oxidation and protein carbonyls in minced pork packaged under modified atmosphere. Food Packaging & Shelf Life, 20, 100311. doi: 10.1016/j.fpsl.2019.100311

Alahakoon, A. U., Oey, I., Bremer, P., & Silcock, P. (2019). Quality and safety considerations of incorporating post-PEF ageing into the pulsed electric fields and sous vide processing chain. Food & Bioprocess Technology, 12(5), 852-864. doi: 10.1007/s11947-019-02254-6

Schuster, L., Franke, C., Silcock, P., Beauchamp, J., & Bremer, P. J. (2018). Development of a novel sample reuse approach to measure the impact of lean meat, bone and adipose tissue on the development of volatiles in vacuum-packed chilled lamb stored at 2 °C for 15 days. Meat Science. Advance online publication. doi: 10.1016/j.meatsci.2018.05.016

Liu, Y.-F., Oey, I., Bremer, P., Silcock, P., & Carne, A. (2018). Proteolytic pattern, protein breakdown and peptide production of ovomucin-depleted egg white processed with heat or pulsed electric fields at different pH. Food Research International, 108, 465-474. doi: 10.1016/j.foodres.2018.03.075

Soni, A., Oey, I., Silcock, P., & Bremer, P. J. (2018). Impact of temperature, nutrients, pH and cold storage on the germination, growth and resistance of Bacillus cereus spores in egg white. Food Research International, 106, 394-403. doi: 10.1016/j.foodres.2018.01.006

Philipp, C., Azad Emin, M., Buckrow, R., Silcock, P., & Oey, I. (2018). Pea protein-fortified extruded snacks: Linking melt viscosity and glass transition temperature with expansion behaviour. Journal of Food Engineering, 217, 93-100. doi: 10.1016/j.jfoodeng.2017.08.022

Soni, A., Oey, I., Silcock, P., Permina, E., & Bremer, P. J. (2018). 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. Advance online publication. doi: 10.1016/j.foodres.2018.08.076

Zareian, M., Silcock, P., & Bremer, P. (2018). Effect of medium compositions on microbially-mediated volatile organic compounds release profile. Journal of Applied Microbiology. Advance online publication. doi: 10.1111/jam.13908

Alahakoon, A. U., Oey, I., Bremer, P., & Silcock, P. (2018). Process optimisation of pulsed electric fields pre-treatment to reduce the sous vide processing time of beef briskets. International Journal of Food Science & Technology. Advance online publication. doi: 10.1111/ijfs.14002

Alothman, M., Lusk, K. A., Silcock, P. J., & Bremer, P. J. (2018). Relationship between total microbial numbers, volatile organic compound composition, and the sensory characteristics of whole fresh chilled pasteurized milk. Food Packaging & Shelf Life, 15, 69-75. doi: 10.1016/j.fpsl.2017.11.005

Soni, A., Oey, I., Silcock, P., Permina, E., & Bremer, P. J. (2018). Differential gene expression for investigation of the effect of germinants and heat activation to induce germination in Bacillus cereus spores. Food Research International. Advance online publication. doi: 10.1016/j.foodres.2018.12.041

Richter, T., Silcock, P., Algarra, A., Eyres, G. T., Capozzi, V., Bremer, P., & Biasioli, F. (2018). Evaluation of PTR-ToF-MS as a tool to track the behavior of hop-derived compounds during the fermentation of beer. Food Research International. Advance online publication. doi: 10.1016/j.foodres.2018.05.056

Schueuermann, C., Silcock, P., & Bremer, P. (2018). Front-face fluorescence spectroscopy in combination with parallel factor analysis for profiling for clonal and vineyard site differences in commercially produced Pinot Noir grape juices and wines. Journal of Food Composition & Analysis, 66, 30-38. doi: 10.1016/j.jfca.2017.11.005

Alahakoon, A. U., Oey, I., Bremer, P., & Silcock, P. (2018). Optimisation of sous vide processing parameters for pulsed electric fields treated beef briskets. Food & Bioprocess Technology. Advance online publication. doi: 10.1007/s11947-018-2155-9

Zareian, M., Böhner, N., Loos, H. M., Silcock, P., Bremer, P., & Beauchamp, J. (2018). Evaluation of volatile organic compound release in modified atmosphere-packaged minced raw pork in relation to shelf-life. Food Packaging & Shelf Life, 18, 51-61. doi: 10.1016/j.fpsl.2018.08.001

Richter, T. M., Bremer, P. J., Silcock, P., & Laing, R. M. (2018). Textile binding and release of body odor compounds measured by proton transfer reaction – mass spectrometry. Textile Research Journal, 88(22), 2559-2567. doi: 10.1177/0040517517725126

Schueuermann, C., Bremer, P., & Silcock, P. (2017). PTR-MS volatile profiling of Pinot Noir wines for the investigation of differences based on vineyard site. Journal of Mass Spectrometry, 52(9), 625-631. doi: 10.1002/jms.3956

Alothman, M., Lusk, K. A., Silcock, P. J., & Bremer, P. J. (2017). Comparing PTR-MS profile of milk inoculated with pure or mixed cultures of spoilage bacteria. Food Microbiology, 64, 155-163. doi: 10.1016/j.fm.2017.01.001

Liu, Y.-F., Oey, I., Bremer, P., Carne, A., & Silcock, P. (2017). Effects of pH, temperature and pulsed electric fields on the turbidity and protein aggregation of ovomucin-depleted egg white. Food Research International, 91, 161-170. doi: 10.1016/j.foodres.2016.12.005

Liu, Y.-F., Oey, I., Bremer, P., Silcock, P., & Carne, A. (2017). In vitro peptic digestion of ovomucin-depleted egg white affected by pH, temperature and pulsed electric fields. Food Chemistry, 231, 165-174. doi: 10.1016/j.foodchem.2017.03.136

Philipp, C., Buckow, R., Silcock, P., & Oey, I. (2017). Instrumental and sensory properties of pea protein-fortified extruded rice snacks. Food Research International, 102, 658-665. doi: 10.1016/j.foodres.2017.09.048

Richter, T. M., Eyres, G. T., Silcock, P., & Bremer, P. J. (2017). Comparison of four extraction methods for analysis of volatile hop-derived aroma compounds in beer. Journal of Separation Science, 40(22), 4366-4376. doi: 10.1002/jssc.201700676

Tirgar, M., Silcock, P., Carne, A., & Birch, E. J. (2017). Effect of extraction method on functional properties of flaxseed protein concentrates. Food Chemistry, 215, 417-424. doi: 10.1016/j.foodchem.2016.08.002

Alahakoon, A. U., Oey, I., Silcock, P., & Bremer, P. (2017). Understanding the effect of pulsed electric fields on thermostability of connective tissue isolated from beef pectoralis muscle using a model system. Food Research International, 100(2), 261-267. doi: 10.1016/j.foodres.2017.08.025

Philipp, C., Oey, I., Silcock, P., Beck, S. M., & Buckow, R. (2017). Impact of protein content on physical and micro-structural properties of extruded rice starch-pea protein snacks. Journal of Food Engineering, 212, 165-173. doi: 10.1016/j.jfoodeng.2017.05.024

Peng, M., Hautus, M. J., Oey, I., & Silcock, P. (2016). Is there a generalized sweetness sensitivity for an individual? A psychophysical investigation of inter-individual differences in detectability and discriminability for sucrose and fructose. Physiology & Behavior, 165, 239-248. doi: 10.1016/j.physbeh.2016.08.004

Niimi, J., Overington, A. R., Silcock, P., Bremer, P. J., & Delahunty, C. M. (2016). Cross-modal taste and aroma interactions: Cheese flavour perception and changes in flavour character in multicomponent mixtures. Food Quality & Preference, 48, 70-80. doi: 10.1016/j.foodqual.2015.08.011

Soni, A., Oey, I., Silcock, P., & Bremer, P. (2016). Bacillus spores in the food industry: A review on resistance and response to novel inactivation technologies. Comprehensive Reviews in Food Science & Food Safety, 15(6), 1139-1148. doi: 10.1111/1541-4337.12231

Ting, V. J. L., Romano, A., Soukoulis, C., Silcock, P., Bremer, P. J., Cappellin, L., & Biasioli, F. (2016). Investigating the in-vitro and in-vivo flavour release from 21 fresh-cut apples. Food Chemistry, 212, 543-551. doi: 10.1016/j.foodchem.2016.05.116

Schueuermann, C., Khakimov, B., Engelsen, S. B., Bremer, P., & Silcock, P. (2016). GC-MS metabolite profiling of extreme southern Pinot noir wines: Effects of vintage, barrel maturation and fermentation dominate over vineyard site and clone selection. Journal of Agricultural & Food Chemistry, 64(11), 2342-2351. doi: 10.1021/acs.jafc.5b05861

Ting, V. J. L., Romano, A., Silcock, P., Bremer, P. J., Corollaro, M. L., Soukoulis, C., … Biasioli, F. (2015). Apple flavor: Linking sensory perception to volatile release and textural properties. Journal of Sensory Studies, 30(3), 195-210. doi: 10.1111/joss.12151

Niimi, J., Eddy, A. I., Overington, A. R., Silcock, P., Bremer, P. J., & Delahunty, C. M. (2015). Sensory interactions between cheese aroma and taste. Journal of Sensory Studies, 30(3), 247-257. doi: 10.1111/joss.12155

Rostás, M., Cripps, M. G., & Silcock, P. (2015). Aboveground endophyte affects root volatile emission and host plant selection of a belowground insect. Oecologia, 177(2), 487-497. doi: 10.1007/s00442-014-3104-6

Yao, L., Laing, R. M., Bremer, P. J., Silcock, P. J., & Leus, M. J. (2015). Measuring textile adsorption of body odor compounds using proton-transfer-reaction mass spectrometry. Textile Research Journal, 85(17), 1817-1826. doi: 10.1177/0040517515576325

Beauchamp, J., Zardin, E., Silcock, P., & Bremer, P. J. (2014). Monitoring photooxidation-induced dynamic changes in the volatile composition of extended shelf life bovine milk by PTR-MS. Journal of Mass Spectrometry, 49(9), 952-958. doi: 10.1002/jms.3430

Benjamin, O., Silcock, P., Beauchamp, J., Buettner, A., & Everett, D. W. (2014). Emulsifying properties of legume proteins compared to β-lactoglobulin and Tween 20 and the volatile release from oil-in-water emulsions. Journal of Food Science, 79(10), E2014-E2022. doi: 10.1111/1750-3841.12593

Niimi, J., Eddy, A. I., Overington, A. R., Heenan, S. P., Silcock, P., Bremer, P. J., & Delahunty, C. M. (2014). Aroma-taste interactions between a model cheese aroma and five basic tastes in solution. Food Quality & Preference, 31, 1-9. doi: 10.1016/j.foodqual.2013.05.017

Niimi, J., Eddy, A. I., Overington, A. R., Silcock, P., Bremer, P. J., & Delahunty, C. M. (2014). Cross-modal interaction between cheese taste and aroma. International Dairy Journal, 39(2), 222-228. doi: 10.1016/j.idairyj.2014.07.002

Silcock, P., Alothman, M., Zardin, E., Heenan, S., Siefarth, C., Bremer, P. J., & Beauchamp, J. (2014). Microbially induced changes in the volatile constituents of fresh chilled pasteurised milk during storage. Food Packaging & Shelf Life, 2(2), 81-90. doi: 10.1016/j.fpsl.2014.08.002

Benjamin, O., Silcock, P., Beauchamp, J., Buettner, A., & Everett, D. W. (2013). Volatile release and structural stability of β-lactoglobulin primary and multilayer emulsions under simulated oral conditions. Food Chemistry, 140(1-2), 124-134. doi: 10.1016/j.foodchem.2013.02.043

Niimi, J., Eddy, A. I., Overington, A. R., Heenan, S. P., Silcock, P., Bremer, P. J., & Delahunty, C. M. (2013). Cheddar cheese taste can be reconstructed in solution using basic tastes. International Dairy Journal, 34(1), 116-124. doi: 10.1016/j.idairyj.2013.08.003

Joyce, N. I., Eady, C. C., Silcock, P., Perry, N. B., & van Klink, J. W. (2013). Fast phenotyping of LFS-silenced (tearless) onions by desorption electrospray ionization mass spectrometry (DESI-MS). Journal of Agricultural & Food Chemistry, 61(7), 1449-1456. doi: 10.1021/jf304444s

Verachia, W., Niven, B., Then, S., Brennan, N., Silcock, P., & Bremer, P. J. (2012). Determination of the similarity between gonads recovered from single sea urchins (Evechinus chloroticus) compared to the similarity of gonads recovered from different urchins. LWT, 49(1), 102-107. doi: 10.1016/j.lwt.2012.04.020

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