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4. Tom O'Callaghan

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Biography

Dr. Tom O’Callaghan is a lecturer in Food Science and Technology in the School of Food and Nutritional Sciences at UCC. Tom graduated from UCC with a BSc in Food Science in 2014 and PhD in Science in 2018. Tom carried out his PhD in Teagasc Moorepark Food Research Centre, examining the effects of cow feeding system on the quality and constituents of raw milk, dairy products and the rumen under the supervision of Prof. Catherine Stanton and Prof. Paul Ross. During his PhD Tom was the recipient of a Teagasc Overseas Training Award which facilitated him to conduct a portion of his studies at The Metabolomics Innovation Centre in the University of Alberta under the supervision of Prof. David Wishart. In 2017, Tom took up the role of permanent Research Officer responsible for dairy chemistry research with Teagasc, in the Dept of Food Chemistry and Technology. Tom’s research has focused on chemistry, nutrition and processing technologies across the supply chain, with particular emphasis on the effects of production practices, cow feeding systems and dairy processing technologies on the quality, nutritional and functional characteristics of milk and dairy products.In 2018, Tom became Principal Investigator and Co-Pilar lead with Food For Health Ireland and in 2019 an Academic Collaborator with VistaMilk, an SFI research centre.‍

Research Interests

Tom’s research has focused on chemistry, nutrition and processing technologies across the supply chain, with particular emphasis on the effects of production practices, cow feeding systems and dairy processing technologies on the quality, nutritional and functional characteristics of milk and dairy products.

Research Grants

	Project	Funding Body	Start Date	End Date	Award
	The fate of chlorate in dairy processes	Teagasc	01-OCT-17	30-SEP-21	€112,000.00
	Examining the impact of a typical Irish pasture dairy system on production, animal performance and rumen functionality	Teagasc	01-OCT-19	30-SEP-23	€127,500.00
	Comprehensive review of the advantages and disadvantages of pasture feeding	Department of Agriculture, Fisheries & Food (DAFF)	01-NOV-18	31-OCT-19	€67,000.00
	Understanding the fate of N-(n-butyl) thiophosphoric triamide (NBPT) and other inhibitors during milk processing	Department of Agriculture, Fisheries & Food (DAFF)	01-OCT-18	30-SEP-22	€112,500.00
	Food For Health Ireland 3: Grass Fed Pilar	Enterprise Ireland	01-OCT-19	30-NOV-24	€1,330,000.00
	Examination of the factors affecting the composition, quality and vitality of bovine colostrum	Teagasc	01-OCT-20	29-SEP-24	€96,000.00
	The Investigation of Milk Fat Depression in Dairy Cattle.	Teagasc	01-OCT-20	30-SEP-24	€88,000.00

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Publications

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Book Chapters

	Year	Publication
	(2020)	'Milk Fat: Chemical and Physical Modification' Hogan, S. A.,O’Callaghan, T. F.,McSweeney, Paul L. H.,Fox, Patrick F.,O'Mahony, James A. (2020) 'Milk Fat: Chemical and Physical Modification' In: Advanced Dairy Chemistry, Volume 2: Lipids. ChamCham: Springer International PublishingSpringer International Publishing.   [DOI] [Details]
	(2020)	'Rumen metabolomics a powerful tool for discovery and understanding of rumen functionality and health' Tom F. O'Callaghan, Eva Lewis (2020) 'Rumen metabolomics a powerful tool for discovery and understanding of rumen functionality and health' In: Dr Chris McSweeney and Prof. Roderick I. Mackie (eds). Improving rumen function. UK: Burleigh Dodds Science Publishing Limited.   [Details]
	(2019)	'Chapter 7 - Nutritional Aspects of Raw Milk: A Beneficial or Hazardous Food Choice' O’Callaghan, Tom F.,Sugrue, Ivan,Hill, Colin,Ross, R. Paul,Stanton, Catherine,Nero, Luís Augusto,De Carvalho, Antonio Fernandes (2019) 'Chapter 7 - Nutritional Aspects of Raw Milk: A Beneficial or Hazardous Food Choice' In: Raw Milk. Academic PressAcademic Press.   [DOI] [Details]

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Peer Reviewed Journals

	Year	Publication
	(2020)	'Current knowledge on urease and nitrification inhibitors technology and their safety' Ray, Aishwarya,Nkwonta, Chikere,Forrestal, Patrick,Danaher, Martin,Richards, Karl,O’Callaghan, Tom,Hogan, Sean,Cummins, Enda (2020) 'Current knowledge on urease and nitrification inhibitors technology and their safety'. Reviews on Environmental Health,   [DOI] [Details]
	(2020)	'Changes to the Oligosaccharide Profile of Bovine Milk at the Onset of Lactation' Quinn, Erinn M.,O’Callaghan, Tom F.,Tobin, John T.,Murphy, John Paul,Sugrue, Katie,Slattery, Helen,O’Donovan, Michael,Hickey, Rita M. (2020) 'Changes to the Oligosaccharide Profile of Bovine Milk at the Onset of Lactation'. Dairy, 1 (3):284-296   [Details]
	(2020)	'A Cross-Cultural Evaluation of Liking and Perception of Salted Butter Produced from Different Feed Systems' C. Garvey, Emer,Sander, Thorsten,O’Callaghan, Tom F.,Drake, MaryAnne,Fox, Shelley,O’Sullivan, Maurice G.,Kerry, Joseph P.,Kilcawley, Kieran N. (2020) 'A Cross-Cultural Evaluation of Liking and Perception of Salted Butter Produced from Different Feed Systems'. Foods, 9 (12)   [Details]
	(2020)	'Raman spectroscopy: A rapid method to assess the effects of pasture feeding on the nutritional quality of butter' Gómez-Mascaraque, L. G.,Kilcawley, K.,Hennessy, D.,Tobin, J. T.,O'Callaghan, T. F. (2020) 'Raman spectroscopy: A rapid method to assess the effects of pasture feeding on the nutritional quality of butter'. Journal of Dairy Science,   [DOI] [Details]
	(2020)	'The bovine colostrum and milk metabolome at the onset of lactation as determined by 1H-NMR' O’Callaghan, Tom F.,O’Donovan, Michael,Murphy, John Paul,Sugrue, Katie,Tobin, John T.,McNamara, Aoife E.,Yin, Xiaofei,Sundaramoorthy, Geetha,Brennan, Lorraine (2020) 'The bovine colostrum and milk metabolome at the onset of lactation as determined by 1H-NMR'. International Dairy Journal,   [DOI] [Details]
	(2016)	'The gut microbiome as a virtual endocrine organ with implications for farm and domestic animal endocrinology' O'Callaghan, T. F.,Ross, R. P.,Stanton, C.,Clarke, G. (2016) 'The gut microbiome as a virtual endocrine organ with implications for farm and domestic animal endocrinology'. Domestic animal endocrinology, 56   [DOI] [Details]
	(2020)	'Evolution of the bovine milk fatty acid profile – From colostrum to milk five days post parturition' O'Callaghan, Tom F.,O'Donovan, Michael,Murphy, John P.,Sugrue, Katie,Mannion, David,McCarthy, William P.,Timlin, Mark,Kilcawley, Kieran N.,Hickey, Rita M.,Tobin, John T. (2020) 'Evolution of the bovine milk fatty acid profile – From colostrum to milk five days post parturition'. International Dairy Journal, 104   [DOI] [Details]
	(2020)	'The effects of sequential heat treatment on microbial reduction and spore inactivation during milk processing' Li, Fang,Hunt, Karen,Buggy, Aoife K.,Murphy, Kevin M.,Ho, Quang Tri,O'Callaghan, Tom F.,Butler, Francis,Jordan, Kieran,Tobin, John T. (2020) 'The effects of sequential heat treatment on microbial reduction and spore inactivation during milk processing'. International Dairy Journal, 104   [DOI] [Details]
	(2020)	'Effect of Diet on the Vitamin B Profile of Bovine Milk-Based Protein Ingredients' Magan, Jonathan B.,O’Callaghan, Tom F.,Zheng, Jiamin,Zhang, Lun,Mandal, Rupasri,Hennessy, Deirdre,Fenelon, Mark A.,Wishart, David S.,Kelly, Alan L.,McCarthy, Noel A. (2020) 'Effect of Diet on the Vitamin B Profile of Bovine Milk-Based Protein Ingredients'. Foods, 9 (5)   [Details]
	(2020)	'Effect of Pseudomonas fluorescens proteases on the quality of Cheddar cheese' Paludetti, Lizandra F.,O'Callaghan, Tom F.,Sheehan, Jeremiah J.,Gleeson, David,Kelly, Alan L. (2020) 'Effect of Pseudomonas fluorescens proteases on the quality of Cheddar cheese'. Journal of Dairy Science,   [DOI] [Details]
	(2020)	'Milk fat: opportunities, challenges and innovation' Mohan, Maneesha S.,O’Callaghan, Tom F.,Kelly, Phil,Hogan, Sean A. (2020) 'Milk fat: opportunities, challenges and innovation'. Critical reviews in food science and nutrition, :1-33   [DOI] [Details]
	(2020)	'Urease and Nitrification Inhibitors—As Mitigation Tools for Greenhouse Gas Emissions in Sustainable Dairy Systems: A Review' Byrne, Maria P.,Tobin, John T.,Forrestal, Patrick J.,Danaher, Martin,Nkwonta, Chikere G.,Richards, Karl,Cummins, Enda,Hogan, Sean A.,O’Callaghan, Tom F. (2020) 'Urease and Nitrification Inhibitors—As Mitigation Tools for Greenhouse Gas Emissions in Sustainable Dairy Systems: A Review'. Sustainability, 12 (15)   [Details]
	(2019)	'Influence of Supplemental Feed Choice for Pasture-Based Cows on the Fatty Acid and Volatile Profile of Milk' O’Callaghan, Tom F.,Mannion, David,Apopei, Diana,McCarthy, Noel A.,Hogan, Sean A.,Kilcawley, Kieran N.,Egan, Michael (2019) 'Influence of Supplemental Feed Choice for Pasture-Based Cows on the Fatty Acid and Volatile Profile of Milk'. Foods, 8 (4)   [Details]
	(2019)	'Impact of Bovine Diet on Metabolomic Profile of Skim Milk and Whey Protein Ingredients' Magan, Jonathan B.,O’Callaghan, Tom F.,Zheng, Jiamin,Zhang, Lun,Mandal, Rupasri,Hennessy, Deirdre,Fenelon, Mark A.,Wishart, David S.,Kelly, Alan L.,McCarthy, Noel A. (2019) 'Impact of Bovine Diet on Metabolomic Profile of Skim Milk and Whey Protein Ingredients'. Metabolites, 9 (12)   [Details]
	(2019)	'Dietary Compounds Influencing the Sensorial, Volatile and Phytochemical Properties of Bovine Milk' Clarke, Holly J.,Griffin, Carol,Rai, Dilip K.,O’Callaghan, Tom F.,O’Sullivan, Maurice G.,Kerry, Joseph P.,Kilcawley, Kieran N. (2019) 'Dietary Compounds Influencing the Sensorial, Volatile and Phytochemical Properties of Bovine Milk'. Molecules, 25 (1)   [Details]
	(2019)	'Physicochemical properties of whole milk powder derived from cows fed pasture or total mixed ration diets' Magan, Jonathan B.,Tobin, John T.,O'Callaghan, Tom F.,Kelly, Alan L.,Fenelon, Mark A.,Hennessy, Deirdre,McCarthy, Noel A. (2019) 'Physicochemical properties of whole milk powder derived from cows fed pasture or total mixed ration diets'. Journal of Dairy Science,   [DOI] [Details]
	(2019)	'Energy-dispersive X-ray fluorescence spectrometry as a tool for the rapid determination of the five major minerals (Na, Mg, K, P and Ca) in skim milk powder' McCarthy, William P,Daly, Karen,Fenelon, Anna,O'Connor, Christine,McCarthy, Noel A,Hogan, Sean A,Tobin, John T,O'Callaghan, Tom F (2019) 'Energy-dispersive X-ray fluorescence spectrometry as a tool for the rapid determination of the five major minerals (Na, Mg, K, P and Ca) in skim milk powder'. International Journal of Dairy Technology, n/a (n/a)   [DOI] [Details]
	(2019)	'The “Grass-Fed” Milk Story: Understanding the Impact of Pasture Feeding on the Composition and Quality of Bovine Milk' Alothman, Mohammad,Hogan, Sean A.,Hennessy, Deirdre,Dillon, Pat,Kilcawley, Kieran N.,O’Donovan, Michael,Tobin, John,Fenelon, Mark A.,O’Callaghan, Tom F. (2019) 'The “Grass-Fed” Milk Story: Understanding the Impact of Pasture Feeding on the Composition and Quality of Bovine Milk'. Foods, 8 (8)   [Details]
	(2019)	'The application of process analytical technologies (PAT) to the dairy industry for real time product characterization - process viscometry' O'Shea, Norah,O'Callaghan, Tom F.,Tobin, John T. (2019) 'The application of process analytical technologies (PAT) to the dairy industry for real time product characterization - process viscometry'. Innovative Food Science & Emerging Technologies,   [DOI] [Details]
	(2018)	'Effect of pH and heat treatment on viscosity and heat coagulation properties of milk protein concentrate' Ho, Quang Tri,Murphy, Kevin M.,Drapala, Kamil P.,O'Callaghan, Tom F.,Fenelon, Mark A.,O'Mahony, James A.,McCarthy, Noel A. (2018) 'Effect of pH and heat treatment on viscosity and heat coagulation properties of milk protein concentrate'. International Dairy Journal, 85 :219-224   [DOI] [Details]
	(2018)	'Pasture Feeding Changes the Bovine Rumen and Milk Metabolome' O’Callaghan, Tom,Vázquez-Fresno, Rosa,Serra-Cayuela, Arnau,Dong, Edison,Mandal, Rupasri,Hennessy, Deirdre,McAuliffe, Stephen,Dillon, Pat,Wishart, David,Stanton, Catherine,Ross, R. (2018) 'Pasture Feeding Changes the Bovine Rumen and Milk Metabolome'. Metabolites, 8 (2)   [DOI] [Details]
	(2018)	'Effect of different forage types on the volatile and sensory properties of bovine milk' Faulkner, Hope,O'Callaghan, Tom F.,McAuliffe, Stephen,Hennessy, Deirdre,Stanton, Catherine,O'Sullivan, Maurice G.,Kerry, Joseph P.,Kilcawley, Kieran N. (2018) 'Effect of different forage types on the volatile and sensory properties of bovine milk'. Journal of Dairy Science, 101 (2):1034-1047   [DOI] [Details]
	(2018)	'Chlorate and Other Oxychlorine Contaminants Within the Dairy Supply Chain' McCarthy, William P.,O'Callaghan, Tom F.,Danahar, Martin,Gleeson, David,O'Connor, Christine,Fenelon, Mark A.,Tobin, John T. (2018) 'Chlorate and Other Oxychlorine Contaminants Within the Dairy Supply Chain'. Comprehensive Reviews in Food Science and Food Safety, 0 (0)   [DOI] [Details]
	(2017)	'Effect of pasture versus indoor feeding systems on quality characteristics, nutritional composition, and sensory and volatile properties of full-fat Cheddar cheese' O'Callaghan, Tom F.,Mannion, David T.,Hennessy, Deirdre,McAuliffe, Stephen,O'Sullivan, Maurice G.,Leeuwendaal, Natasha,Beresford, Tom P.,Dillon, Pat,Kilcawley, Kieran N.,Sheehan, Jeremiah J.,Ross, R. Paul,Stanton, Catherine (2017) 'Effect of pasture versus indoor feeding systems on quality characteristics, nutritional composition, and sensory and volatile properties of full-fat Cheddar cheese'. Journal of Dairy Science, 100 (8):6053-6073   [DOI] [Details]
	(2017)	'The Composition of Human Milk and Infant Faecal Microbiota Over the First Three Months of Life: A Pilot Study' Murphy, Kiera,Curley, David,O’Callaghan, Tom F.,O’Shea, Carol-Anne,Dempsey, Eugene M.,O’Toole, Paul W.,Ross, R. Paul,Ryan, C. Anthony,Stanton, Catherine (2017) 'The Composition of Human Milk and Infant Faecal Microbiota Over the First Three Months of Life: A Pilot Study'. Scientific Reports, 7   [DOI] [Details]
	(2017)	'Glycomacropeptide Sustains Microbiota Diversity and Promotes Specific Taxa in an Artificial Colon Model of Elderly Gut Microbiota' Ntemiri, Alexandra,Chonchúir, Fodhla Ní,O’Callaghan, Tom F.,Stanton, Catherine,Ross, R. Paul,O’Toole, Paul W. (2017) 'Glycomacropeptide Sustains Microbiota Diversity and Promotes Specific Taxa in an Artificial Colon Model of Elderly Gut Microbiota'. Journal of Agricultural and Food Chemistry, 65 (8):1836-1846   [DOI] [Details]
	(2016)	'Effect of pasture versus indoor feeding systems on raw milk composition and quality over an entire lactation' O’Callaghan, Tom F.,Hennessy, Deirdre,McAuliffe, Stephen,Kilcawley, Kieran N.,O’Donovan, Michael,Dillon, Pat,Ross, R. Paul,Stanton, Catherine (2016) 'Effect of pasture versus indoor feeding systems on raw milk composition and quality over an entire lactation'. Journal of Dairy Science, 99 (12):9424-9440   [DOI] [Details]
	(2016)	'Streptococcus thermophilus APC151 Strain Is Suitable for the Manufacture of Naturally GABA-Enriched Bioactive Yogurt' Linares,Daniel M.,O’Callaghan,Tom F.,O’Connor,Paula M.,Ross,R. P.,Stanton,Catherine (2016) 'Streptococcus thermophilus APC151 Strain Is Suitable for the Manufacture of Naturally GABA-Enriched Bioactive Yogurt'. Frontiers in Microbiology, 7 (1876)   [DOI] [Details]
	(2016)	'Quality characteristics, chemical composition, and sensory properties of butter from cows on pasture versus indoor feeding systems' O'Callaghan, Tom F.,Faulkner, Hope,McAuliffe, Stephen,O’Sullivan, Maurice G.,Hennessy, Deirdre,Dillon, Pat,Kilcawley, Kieran N.,Stanton, Catherine,Ross, R. Paul (2016) 'Quality characteristics, chemical composition, and sensory properties of butter from cows on pasture versus indoor feeding systems'. Journal of Dairy Science, 99 (12):9441-9460   [DOI] [Details]
	(2015)	'Use of ultrafiltration to prepare a novel permeate for application in the functionality testing of infant formula ingredients' Crowley, Shane V,O’Callaghan, Tom F,Kelly, Alan L,Fenelon, Mark A,O’Mahony, James A (2015) 'Use of ultrafiltration to prepare a novel permeate for application in the functionality testing of infant formula ingredients'. Separation and Purification Technology, 141 :294-300 [Details]

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Conference Publications

	Year	Publication
	(2019)	THE NITROGEN CYCLE A MINI REVIEW Byrne, Maria P,Tobin, John T,Forrestal, Patrick,Richards, Karl,Danaher, Martin,Cummins, Enda,O’Callaghan, Tom F (2019) THE NITROGEN CYCLE A MINI REVIEW THE NITROGEN CYCLE A MINI REVIEW [Details]

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Thesis/Dissertation

	Year	Publication
	(2018)	Effect of cow feeding system on the quality and constituents of raw milk, dairy products and the rumen. Tom F. O'Callaghan (2018) Effect of cow feeding system on the quality and constituents of raw milk, dairy products and the rumen. Ireland: Thesis/Dissertation   [Details]

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Technical Publication

	Year	Publication
	(2020)	An overview of the A1/A2 milk hypothesis. Tom F. O'Callaghan (2020) An overview of the A1/A2 milk hypothesis. Ireland: Technical Publication   [Details]
	(2019)	Nutritional attributes of grass-fed dairy. Tom F. O’Callaghan (2019) Nutritional attributes of grass-fed dairy. Technical Publication   [Details]

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Professional Activities

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Honours and Awards

	Year	Title	Awarding Body
	2017	Teagasc Overseas Training Award	Teagasc
	2016	Teagasc PhD Walsh Fellowship	Teagasc

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Employment

	Employer	Position	From / To
	Teagasc	Research Officer (Permanent)	06-MAR-17 / 08-MAY-20

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Education

	Year	Institution	Qualification	Subject
	2014	University College Cork	B.Sc	Food Science
	2018	University College Cork	Ph.D	Science

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Journal Activities

	Journal	Role	To / From
	Foods	Referee	-
	Nutrients	Referee	-
	International Dairy Journal	Referee	-
	Journal Of Dairy Science	Referee	-

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Teaching Activities

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Teaching Interests

Dairy chemistry
Dairy processing
Food science and technology
Currently lecturing on modules 
FS2003 - Introductory Food Chemistry [Physical Chemistry]
FS2005 - Principles of Food Science and Technology
FS3010 - Science and Technology of Food Systems [A]
FS3015 - Dairy Processing and Preservation
FS3020 - Methods of Food Processing Analysis
FS3016 - Ingredient recovery from milk, whey and their co products
FS4022 - Topics in Food Science‍

Research Information

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Internal Collaborators

	Name	Institute	Country
	Prof. Alan Kelly	School of Food and Nutritional Sciences	IRELAND
	Dr. Seamus O'Mahony	School of Food and Nutritional Sciences	IRELAND

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External Collaborators

	Name	Organisation / Institute	Country
	Dr Noel McCarthy	Teagasc	IRELAND
	Prof. Todor Vasiljevic	Victoria University	AUSTRALIA
	Prof. Ian Givens	University of Reading	UNITED KINGDOM
	Prof. David Wishart	The Metabolomics Innovation Center	CANADA
	Prof. Lorraine Brennan	University College Dublin	IRELAND
	Dr Sean Hogan	Teagasc	IRELAND