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

Investigation of antinutritive components in Hungarian potato cultivars depending on production technology

We have investigated the Total Glycoalcaloid (TGA), nitrite, and nitrate contents of some Hungarian and foreign potato cultivars in relation to the effect of different combination of fertilisers and green manure, late blight management strategies (none, programmed, or prediction based spraying), and irrigation regime for three years. The Hungarian cultivars have exotic potato species like S. acaule, S. demissum, S. stoloniferum, S. vernei, or S. tub. ssp. andigenum in their genetic background as sources of resistance genes. No effect of fertilisers or irrigation was found on the level of glycoalkaloids and nitrate contents, which were influenced mostly by the genotype and season. In conclusion, the absolute amount and the presence of different antinutritive components of potato tubers were influenced by the technology, genotype, and season in a complex manner. These results in general prove that ware potato production utilising intensive commercial agrotechnical practices and common cultivars is safe regarding the nitrate and TGA content of tubers

Celiac disease-specific prolamin peptide content of wheat relatives and wild species determined by ELISA assays and bioinformatics analyses

Enzyme-linked immunosorbent assays (ELISAs) are widely used to determine gluten contamination in gluten-free and low gluten food samples. ELISA assays developed using monoclonal antibodies against known toxic peptides have an advantage in the identification of toxic prolamin content in protein extracts of different food samples, as well as raw materials. R5 and G12 monoclonal antibodies specific for two known toxic peptides used in commercially available gluten ELISA assays were applied to test toxic peptide contents in wheat relatives and wild wheat species with different genome composition and complexity. Although the R5 peptide content showed some correlation with ploidy levels in Triticum species, there was a high variance among Aegilops species. Some of the analysed diploid Aegilops species showed extremely high R5 peptide contents. Based on the bioinformatics analyses, the R5 peptide was present in most of the sulphur rich prolamins in all the analysed species, whereas the G12 epitope was exclusively present in alpha gliadins. High variation was detected in the position and frequency of epitopes in sequences originating from the same species, thus highlighting the importance of genotypic variation within species. Identification of new prolamin alleles of wheat relatives and wild wheat species is of great importance in order to find germplasm for special end-use quality purposes as well as development of food with reduced toxicity

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

Comparative study of composition and technological quality of amaranth. I. Gross chemical composition, amino acid and mineral content

Eight groups of amaranth grain samples, belonging to the species Amaranthus cruentus and A. hypochondriacus , grown in Austria and Hungary were studied. Gross chemical composition, amino acid content and mineral composition of the whole grain were determined. The effect of heat treatment on amino acid content was also investigated. The range of concentration of main constituents of samples studied corresponded to the average data reported by other researchers. However, the relatively big difference between lowest (14.23%) and highest (17.40%) protein content suggests that genetic potential for increasing the protein content may be realized in breeding. Amino acid composition profile is generally closer to Leguminosae than to cereal grains except for sulphur containing amino acids being present in higher amount in amaranth than in legumes. The concentrations of minerals in seeds varied in a relatively wide range, and the micro-components, like Fe, Cu, Zn, were present in higher amount in amaranth seeds compared to the average values found in wheat. It was confirmed that heat treatment of amaranth grain (e.g. popping) might reduce the available lysine content. Contradictory data published in the literature may be explained by differences in initial sugar and moisture content of grain, which influence the rate of potential Maillard-reaction

Lab-on-a-chip technology in cereal science: Analytical properties and possible application areas

The utilisation of microchip capillary electrophoresis has the potential to improve the capability of high throughput sample analysis of biomolecules. The aim of this study was to review this capability for cereal protein analysis.The commercially available lab-on-a-chip (LOC) technology was characterised in the separation of total proteins extracted from whole wheat meals. Important analytical parameters (such as repeatability) of both qualitative (molecular size estimation) and quantitative (relative percentage of total protein) aspects of LOC data were determined and discussed in the light of the need of possible applications. It revealed that the LOC has very good repeatability and reproducibility parameters; however the non-globular structure of the proteins can highly affect the sizing accuracy. Among other applications, the profiles were found to be suitable for wheat cultivar identification and to monitor environment related alterations on protein composition.After a confirmation process the LOC can be an appropriate tool for fast protein profile screening in cereal science and technology in diverse applications, and it can complement the conventional methods of analysis