Dr Terri Grassby
Lecturer in Food Science
BSc, PhD
Academic and research departments
Faculty of Health and Medical Sciences, Strategic Research Theme: Lifelong Health.Biography
I am a lecturer in food science in the department of Nutritional Sciences. My research interests are based on plant polysaccharides and their direct and indirect nutritional effects. I originally studied chemistry, but have gradually moved towards food science and nutrition, via plant biology.
Areas of specialism
Food Science; Dietary Fibre; Plant Polysaccharides
University roles and responsibilities
- Module Organiser, BMS2053 Food Analysis and Quality Control
- Module Organiser, BMS3059 Food: Chemistry, Functionality and Health Effects
My qualifications
2003
BSc Chemistry with Industrial Experience
University of Bristol
2008
PhD Biological Sciences
Institute of Food Research (now Quadram Institute Bioscience) & University of East Anglia
Affiliations and memberships
Royal Society of Chemistry
Member
Biochemical Society
Member
Higher Education Academy
Associate Fellow
Research
Research interests
My research interests are based on plant polysaccharides and their direct and indirect nutritional effects. I am applying this knowledge to a wide range of projects involving industrial and academic partners.
Research projects
The effects of almond nut consumption on emerging markers of cardiovascular and metabolic disease
Morbidity from cardiovascular disease (CVD) and diabetes is increasing, at huge cost to quality of life and national economies. Snack choices are one particular area of diet and lifestyle modification which has the potential to positively influence CVD risk by changing dietary patterns. previously shown to reduce some CVD risk factors when consumed at 50-60g per day. This proposal aims to provide mechanistic insights into the in adults at moderate risk of developing CVD.
In collaboration with King's College London, funded by the Almond Board of California.
Ostoeat - Improving the food-related quality of life of ileostomy patients
Ileostomy patients often experience discomfort when eating foods containing fibre. The relationship between the type of fibre that causes problems, and how it behaves during digestion has not been investigated systematically. This project aims to combine responses to an online questionnaire and lab-based analyses to underpin improved guidance to patients.
Particle sizing of masticated tree nuts - predicting lipid release
The release of starch and lipid from plant foods in the gut (bioaccessibility) plays an important role in influencing starch and lipid digestion, postprandial metabolism and gut hormone signalling. This project is aiming to validate the mathematical model developed within the BBSRC DRINC project in tree nuts other than almonds. Poor initial lipid bioaccessibility may explain their lower than expected metabolisable energy content.
Supervision
Postgraduate research supervision
Ndidi Ihekwaba:
Design of functional oligosaccharides as sucrose replacers
Postgraduate research supervision
Adenike Adewuni:
Resistant starch 5: amylose-lipid complexes
My teaching
I have taught food science to undergraduate students for the last 6 years, first at King's College London and now at the University of Surrey. I supervise undergraduate and postgraduate projects related to food science, often involving new product development. I am an Associate Fellow of the Higher Education Academy. To see me during office hours, please email me for an appointment.
Courses I teach on
Undergraduate
Postgraduate taught
My publications
Highlights
Analysis of starch amylolysis using plots of first-order kinetics
PJ Butterworth, FJ Warren, T Grassby, H Patel, PR Ellis
Carbohydrate Polymers (2012) 87(3), 2189-2197
Publications
Mandalari G, Grundy MM, Grassby T, Parker ML, Cross KL, Chessa S, Bisignano C, Barreca D, Bellocco E, Laganà G, Butterworth PJ, Faulks RM, Wilde PJ, Ellis PR, Waldron KW (2014)The effects of processing and mastication on almond lipid bioaccessibility using novel methods of in vitro digestion modelling and micro-structural analysis., In: Br J Nutr112(9)pp. 1521-1529
Grassby T, Jay AJ, Merali Z, Parker ML, Parr AJ, Faulds CB, Waldron KW (2013)Compositional analysis of Chinese water chestnut (Eleocharis dulcis) cell-wall material from parenchyma, epidermis, and subepidermal tissues., In: J Agric Food Chem61(40)pp. 9680-9688
Knudsen GM, Nielsen MB, Grassby T, Danino-Appleton V, Thomsen LE, Colquhoun IJ, Brocklehurst TF, Olsen JE, Hinton JC (2012)A third mode of surface-associated growth: immobilization of Salmonella enterica serovar Typhimurium modulates the RpoS-directed transcriptional programme., In: Environ Microbiol14(8)pp. 1855-1875
Grassby T, Edwards CH, Grundy M, Ellis PR (2013)Functional Components and Mechanisms of Action of ‘Dietary Fibre’ in the Upper Gastrointestinal Tract: Implications for Health, In: Harding SE (eds.), Stability of Complex Carbohydrate Structures Biofuels, Foods, Vaccines and Shipwrecks(4)pp. 36-55 Royal Society of Chemistry
Butterworth PJ, Warren FJ, Grassby T, Patel H, Ellis PR (2011)Analysis of starch amylolysis using plots for first-order kinetics, In: Carbohydrate Polymers87(3)pp. 2189-2197 Elsevier
Parker M, Grundy M, Grassby Terri, Smeriglio A, Bisignano C, Raciti R, Trombetta D, Baer D, Wilde P, Mandalari G (2018)Understanding the Effect of Particle Size and Processing on Almond Lipid Bioaccessibility through Microstructural Analysis: From Mastication to Faecal Collection, In: Nutrients10(2)213 MDPI
Grassby Terri, Shen Y, Wagner L, Beckett S, Hall W, Berry S (2016)Predicting Initial Lipid Release from Masticated Tree Nuts Using Mathematical Modelling, In: FASEB Journal30(Sup 1)405.6 Federation of American Society of Experimental Biology
Grassby Terri, Wagner L, Beckett S, Hall W, Berry S (2015)Predicting initial lipid release from masticated cashews and walnuts using mathematical modelling, In: Annals of Nutrition and Metabolism67(Sup 1) Karger Publishers
Edwards CH, Grundy MM, Grassby T, Vasilopoulou D, Frost GS, Butterworth PJ, Berry SE, Sanderson J, Ellis PR (2015)Manipulation of starch bioaccessibility in wheat endosperm to regulate starch digestion, postprandial glycemia, insulinemia, and gut hormone responses: a randomized controlled trial in healthy ileostomy participants., In: Am J Clin Nutr102(4)pp. 791-800
Grassby T, Picout DR, Mandalari G, Faulks RM, Kendall CWC, Rich GT, Wickham MSJ, Lapsley K, Ellis PR (2014)Modelling of nutrient bioaccessibility in almond seeds based on the fracture properties of their cell walls, In: FOOD & FUNCTION5(12)pp. 3096-3106 ROYAL SOC CHEMISTRY
Grundy MM, Grassby T, Mandalari G, Waldron KW, Butterworth PJ, Berry SE, Ellis PR (2015)Effect of mastication on lipid bioaccessibility of almonds in a randomized human study and its implications for digestion kinetics, metabolizable energy, and postprandial lipemia., In: Am J Clin Nutr101(1)pp. 25-33
Ellis P, Grundy M, Grassby Terri, Mandalari G, Faulks R, Berry S, Waldron K, Butterworth P (2012)The role of dietary fiber in regulating lipid bioaccessibility of almonds during mastication, In: The FASEB Journal26(Sup 1) Federation of American Society of Experimental Biology
Butterworth P, Warren F, Edwards C, Grassby Terri, Patel H, Ellis P (2012)How analysis of data from alpha-amylase catalysed starch digestibility performed in vitro contributes to an understanding of rates and extent of digestion starchy foods, In: FASEB Journal26(Sup 1) Federation of American Society of Experimental Biology
Grassby Terri, Mandalari G, Grundy MM-L, Edwards CH, Bisignano C, Trombetta D, Smeriglio A, Chessa S, Ray S, Sanderson J, Berry SB, Ellis PR, Waldron KW (2017)In vitro and in vivo modeling of lipid bioaccessibility and digestion from almond muffins: The importance of the cell-wall barrier mechanism, In: Journal of Functional Foods37pp. 263-271 Elsevier
Lovegrove A, Edwards CH, De Noni I, Patel H, El SN, Grassby T, Zielke C, Ulmius M, Nilsson L, Butterworth PJ, Ellis PR, Shewry PR (2015)Role of Polysaccharides in Food, Digestion and Health., In: Critical reviews in food science and nutrition57(2)pp. 237-253 Taylor & Francis