Determination of aflatoxin M1 in milk samples by an OWLS-based immunosensor

An immunoreaction-based method was investigated for the detection of aflatoxin M1 (AFM1), which is the hydroxylated metabolite of aflatoxin B1 (AFB1). This mycotoxin may be found in milk and milk products obtained from livestock that have ingested contaminated feed. Quantitative analysis of AFM1 was carried out using indirect (competitive) immunoassay method, which can be used for low weight molecules. The real-time measurement was done with Optical Waveguide Lightmode Spectroscopy (OWLS) technique. After the optimization of the chemical and biochemical parameters (determination of the optimal concentration of the immobilized AFM1-protein conjugate, determination of the AFM1 antibody content of the samples, etc.) real samples were also examined. Three kinds of milk sample preparation methods (filtration, centrifugation, size exclusion centrifugation) and two dilution rates (100 and 200 fold) were compared. The presented competitive immunoassay method showed the best results when 100 fold diluted filtered or centrifuged milk samples were examined. The dynamic measuring ranges for AFM1 were 0.001–0.1 ng ml−1 and 0.0005–0.01 ng ml−1, respectively

Book reviews

Foods, nutrients and food ingredients with authorised EU health claims. M.J. SADLER (Ed.). Woodhead Publishing is an imprint of Elsevier, Cambridge, UK, Waltham, US, Kidlington, UK, Series in Food Science, Technology and Nutrition: Number 263, 2014 ISBN 978-0-85709-842-9 (print), ISBN 978-0-85709-848-1 (e-book), 397 page

Book reviews

N.N. MISRA, O.K. SCHLÜTER and P.J. KULLEN (Eds): Cold plasma in food and agriculture. Fundamentals and applications. Elsevier Science Publishing Co Inc., 2016, 125 London Wall, London EC2Y 5AS, United Kingdom ISBN: 978-0-12-801365-6, 380 pages | K. KNOERZER, P. JULIANO and G. SMITHERS (Eds): Innovative food processing technologies. Extraction, separation, component modifi cation and process intensifi cation. Woodhead Publishing, The Offi cers’ Mess Business Centre, Royston Road, Duxford, CB22 4QH, UK, 50 Hampshire Street, 5th Floor, Cambridge, MA 02139, USA The Boulevard, Langford Lane, Kidlington, OX5 1GB, UK ISBN: 978-0-08-100294-0, 481 pages | R. CARLE and R.M. SCHWEIGGERT (Eds): Handbook on natural pigments in food and beverages. Industrial applications for improving food color. Woodhead Publishing Series in Food Science, Technology and Nutrition ,Vol. 295. Woodhead Publisher is an imprint of Elsevier, The Offi cers’ Mess Business Centre, Royston Road, Duxford, CB22 4QH. UK ISBN: 978-0-08-100371-8, 509 pages | J. SINGH and L. KAUR (Eds): Advances in potato chemistry and technology. Academic Press is an Imprint of Elsevier, London, San Diego, Cambridge, Oxford, 2nd edition, ISBN: 978-0-12-800002-1 (print), 725 page

Interfacial enzyme partitioning as a tool for constructing biosensors

To explore new possibilities of enzyme immobilization, we investigated bioactive layers prepared by a new procedure based on three-phase partitioning (TPP) of proteins. By this method a third phase or midlayer as a protein layer can be developed at the interface of a protein system containing two phases (organic solvent/aqueous salt solution). Proteins of meat origin partitioned together with bioselective material (e.g. an enzyme) after centrifugation resulted in excellent bioactive layers.In the newly developed sensor, glucose oxidase was immobilized in a layer, which was fixed on the surface of a platinum ring electrode. The biosensor was built in a flow injection analyzer (FIA) system, where the hydrogen peroxide generated during the enzymatic reactions was determined by an amperometric cell. The parameters for biochemical and electrochemical reactions (ion concentration and pH of buffer, flow rate) were optimized. The linear range of analysis by the newly developed sensor was from 0.5 to 10 mmol l–1 glucose. The biosensor could be used for more than 300 analysis

Book reviews

F. Á. Mohos: Confectionery and chocolate engineering – Principles and applications, Wiley Blackwell, Chichester, UK; Hoboken, US ISBN: 978-1-118-93977-2 | Food packaging. Nanotechnology in the agri-food industry, Vol. 7. A.M. GRUMEZESCU (Ed.) Elsevier Science Publishing Co Inc., 2017, 125 London Wall, London EC2Y 5AS, United Kingdom, ISBN: 978-0-12-804302-8, 796 pages | Food processing technology. Principles and practice. P.J. FELLOWS (Ed.) Woodhead Publishing, Cambridge, 2017, Series in Food Science, Technology and Nutrition, Fourth Edition ISBN: 978-0-08-101907-8, 1152 pages | Lactose-derived prebiotics – A process perspective A. ILLANES, C. GUERRERO, C. VERA, L. WILSON, R. CONEJEROS and F. SCOTT Academic Press is an imprint of Elsevier, London, UK, San Diego, USA, Cambridge, USA, Oxford, UK, 2016 ISBN: 978-0-12-802724-0 (print), 312 pages | Nanobiosensors A. GRUMEZESCU (Ed.) Nanotechnology in the Agri-Food Industry Vol. 8. Academic Press is an imprint of Elsevier, 125 London Wall, London EC2Y 5AS, United Kingdom ISBN: 978-0-12-804301-1, 926 pages | Sustainable protein sources S.R. NADATHUR, J.P.D. WANASUNDARA and L. SCANLIN (Eds) Academic Press is an imprint of Elsevier, London, UK, San Diego, USA, Cambridge, USA, Oxford, UK, 2016 ISBN: 978-0-12-802778-3 (print), 456 page

Effect of short-term storage on walnut fruit quality

Two Hungarian and two introduced walnut cultivars were examined as fresh samples and under storage. Some important compositional data were determined in order to evaluate the differences between the cultivars and the changes after storage. The cultivars’ oil contents were the same, but there was some difference in fatty acid composition; ‘Alsószentiváni 117’ had a higher mono-unsaturated fatty acid content than the others. Considering the oxidative stability, ‘Alsószentiváni 117’ contained good properties in all stages (induction time equals or higher than 10 h). Lower antioxidant capacity was measured in ‘Chandler’ samples compared to the others. ‘Alsószentiváni 117’ has higher α- and γ-tocopherol contents than the other cultivars studied. Two different drying methods were also compared in case of the Hungarian cultivars. The changes in compositional data showed no tendencies. We found that Hungarian cultivars were at least as valuable as the introduced ones

Book reviews

Nanoencapsulation technologies for the food and nutraceutical industries S.M. JAFARI (Ed.) Academic Press, Elsevier Science Publishing Co Inc., 2016, 125 London Wall, London EC2Y 5AS, United Kingdom, ISBN 978-0-12-809436-5, 610 pages | Food safety in the 21st century: Public health perspective (1st ed.) R. K. GUPTA, B. P. DUDEJA and A. S. MINHAS (Eds) Academic Press is an imprint of Elsevier, 125 London Wall, London EC2Y 5AS, United Kingdom ISBN: 978-0128017739, 624 pages | Molecular methods for the detection and characterization of foodborne and environmental pathogens R.K. GUPTA, B. P. DUDEJA and A. S. MINHAS (Eds) DEStech Publications, Inc. 439 North Duke Street, Lancaster, Pennsylvania 17602 U.S.A. ISBN No. 978-1-60595-079-2, 156 pages | Foodborne diseases 3rd edition C.E.R. DODD, T. ALDSWORTH, R.A. STEIN, D.O. CLIVER and H.P. RIEMANN (Eds) Academic Press is an imprint of Elsevier, London, UK, San Diego, USA, Cambridge, USA, Oxford, UK, 2016, ISBN: 978-0-12-385007-2 (print), 576 pages | The vitamins: Fundamental aspects in nutrition and health 5th edition G.F. COMBS and J.P. MCCLUNG (Eds) Academic Press is an imprint of Elsevier, London, UK, San Diego, USA, Cambridge, USA, Oxford, UK, 2016, ISBN: 978-0-12-802965-7, 628 page