ELENI C. MAZARAKIOTI
@foodscitech.upatras.gr
Department of Food Science and Technology
University of Patras
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Anna-Akrivi Thomatou, Eleni C. Mazarakioti, Anastasios Zotos, Achilleas Kontogeorgos, Angelos Patakas, and Athanasios Ladavos
MDPI AG
There is a plethora of food products with geographical indications registered in the European Union without any study about their discrimination from other similar products. This is also the case for Greek currants. This paper aims to analyze if stable isotope analysis of C, N, and S could discriminate the Greek currants “Vositzza”, registered as a product of Protected Designation of Origin, from two other currants registered as products of Protected Geographical Indication coming from neighboring areas. The first results show that the stable isotope ratio of sulfur is not detectable due to the very low sulfur content in the samples, and the analysis should be based on the stable isotope ratios of carbon and nitrogen to discriminate these products. The mean value of δ15N (1.38‰) of PDO “Vostizza” currants is lower than that of currants grown outside the PDO zone (2.01‰), while the mean value of δ13C of PDO “Vostizza” currants is higher (−23.93‰) in comparison to that of currants grown outside the PDO zone (−24.83‰). Nevertheless, the results indicate that with only two isotopic ratios, discrimination could not be achieved, and further analysis is required.
George Tsirogiannis, Anastasios Zotos, Eleni C. Mazarakioti, Efthimios Kokkotos, Achilleas Kontogeorgos, Angelos Patakas, and Athanasios Ladavos
MDPI AG
In this study, we aimed to develop a sampling method that could be used in geographical discrimination studies of Protected Geographical Indication (PGI) dry beans (Phaseolus vulgaris L.) by considering the geoclimatic variability within the cultivation zone of the analyzed product. The Regional Unit of Kastoria in Greece, a major area of protected designation origin of pulse crops, was selected for detailed investigation. Meteorological data were collected from five weather stations in different subregions of Kastoria (Argos Orestiko, Kalochori, Lakkomata, Lithia, and Polykarpi), over a period of six years (2015 to 2020), along with data of soil texture. The collected data were analyzed in order to determine statistically significant differences among the subregions with regard to the aforementioned parameters. A seasonality pattern was observed for all subregions concerning the microclimate, which splits the data into two clusters. Moreover, a significant variation of the soil textures was revealed, frequently affecting farmers’ decision regarding agronomic practices, leading to the unique stable-isotope ratios and multi-elemental composition. This study guides the dry bean sample collection and will enable the designation of the boundaries of protected origin regions and enable future sampling schemes for stable-isotope and multi-elemental analysis.
Isabel Abánades Lázaro, Eleni C. Mazarakioti, Eduardo Andres-Garcia, Bruno J. C. Vieira, João C. Waerenborgh, Iñigo J. Vitórica-Yrezábal, Mónica Giménez-Marqués, and Guillermo Mínguez Espallargas
Royal Society of Chemistry (RSC)
Using the commercially available isonicotinic acid and iron, we report two ultramicroporous MOFs, denoted MUV-26.
Solène Delaporte, Isabel Abánades Lázaro, Javier López-Cabrelles, Eleni C. Mazarakioti, Sarah Chebourou, Iñigo J. Vitórica-Yrezábal, Mónica Giménez-Marqués, and Guillermo Mínguez Espallargas
Royal Society of Chemistry (RSC)
A family of robust and stable molybdenum-based metal–organic cages have been obtained based on the [Mo2O2(μ2-O)2]2+ secondary building unit.
Eleni C. Mazarakioti, Anastasios Zotos, Anna-Akrivi Thomatou, Achilleas Kontogeorgos, Angelos Patakas, and Athanasios Ladavos
MDPI AG
Fraudulent practices are the first and foremost concern of food industry, with significant consequences in economy and human’s health. The increasing demand for food has led to food fraud by replacing, mixing, blending, and mislabeling products attempting to increase the profits of producers and companies. Consequently, there was the rise of a multidisciplinary field which encompasses a large number of analytical techniques aiming to trace and authenticate the origins of agricultural products, food and beverages. Among the analytical strategies have been developed for the authentication of geographical origin of foodstuff, Inductively Coupled Plasma Mass Spectrometry (ICP-MS) increasingly dominates the field as a robust, accurate, and highly sensitive technique for determining the inorganic elements in food substances. Inorganic elements are well known for evaluating the nutritional composition of food products while it has been shown that they are considered as possible tracers for authenticating the geographical origin. This is based on the fact that the inorganic component of identical food type originating from different territories varies due to the diversity of matrix composition. The present systematic literature review focusing on gathering the research has been done up-to-date on authenticating the geographical origin of agricultural products and foods by utilizing the ICP-MS technique. The first part of the article is a tutorial about food safety/control and the fundaments of ICP-MS technique, while in the second part the total research review is discussed.
Anna-Akrivi Thomatou, Eleni Psarra, Eleni C. Mazarakioti, Katerina Katerinopoulou, Georgios Tsirogiannis, Anastasios Zotos, Achilleas Kontogeorgos, Angelos Patakas, and Athanasios Ladavos
MDPI AG
Consumers are increasingly interested in the geographical origin of the foodstuff they consume as an important characteristic of food authenticity and quality. To assure the authenticity of the geographical origin, various methods have been proposed. Stable isotope analysis is a method that has been extensively used for products such as wine, oil, meat, while only a few studies have been conducted for the discrimination of seafood origin and especially for mullet roes or bottarga products. Analysis of the stable isotopes of C, N and S of Bottarga samples from four different origins were carried out. The values of δ15N (5.45‰) and δ34S (4.66‰) for the Greek Bottarga Product named ‘Avgotaracho Messolongiou’, from Messolongi lagoon were lower than other areas while δ13C values were higher (−14.84‰). The first results show that the stable isotopes ratios of carbon, nitrogen and sulphur could be used to discriminate the Greek Protected Designations of Origin Bottarga product ‘Avgotaracho Messolongiou’ from other similar products.
George Tsirogiannis, Anna-Akrivi Thomatou, Eleni Psarra, Eleni C. Mazarakioti, Katerina Katerinopoulou, Anastasios Zotos, Achilleas Kontogeorgos, Angelos Patakas, and Athanasios Ladavos
MDPI AG
Consumers are increasingly interested in the geographical origin of foodstuff, as an important characteristic of food authenticity and quality. To assure the authenticity of the geographical origin, various methods have been proposed. Stable isotope analysis is a method that has been extensively used for products like wine, oil, and meat by using large datasets and analysis. On the other hand, only few studies have been conducted for the discrimination of seafood origin and especially for mullet roes or bottarga products, and even fewer investigate a small number of samples and datasets. Stable isotopes of Carbon (C), Nitrogen (N), and Sulfur (S) analysis of bottarga samples from four different origins were carried out. The first results show that the stable isotopes ratios of C, N, and S could be used to discriminate the Greek PDO Bottarga (Messolongi) from other similar products by using a probabilistic machine learning methodology. That could use limited sample data to fit/estimate their parameters, while, at the same time, being capable of describing accurately the population and discriminate individual samples regarding their origin.
Amy Trinh Pham, Parisa Abbasi, Gabriele Delle Monache, Eleni C. Mazarakioti, Jeremy M. Rawson, Theocharis C. Stamatatos, and Melanie Pilkington
Elsevier BV
Eleni C. Mazarakioti, Amaia Soto Beobide, Varvara Angelidou, Constantinos G. Efthymiou, Aris Terzis, Vassilis Psycharis, George A. Voyiatzis, and Spyros P. Perlepes
MDPI AG
The goal of this work is to model the nature of the chemical species [CdCl2(extractant)2] that are formed during the solvent (or liquid-liquid) extraction of the toxic cadmium(II) from chloride-containing aqueous media using hydrophobic 2-pyridyl ketoximes as extractants. Our coordination chemistry approach involves the study of the reactions between cadmium(II) chloride dihydrate and phenyl 2-pyridyl ketoxime (phpaoH) in water-containing acetone. The reactions have provided access to complexes [CdCl2(phpaoH)2]∙H2O (1∙H2O) and {[CdCl2(phpaoH)]}n (2); the solid-state structures of which have been determined by single-crystal X-ray crystallography. In both complexes, phpaoH behaves as an N,N’-bidentate chelating ligand. The complexes have been characterized by solid-state IR and Raman spectra, and by solution 1H NMR spectra. The preparation and characterization of 1∙H2O provide strong evidence for the existence of the species [CdCl2(extractant)2] that have been proposed to be formed during the liquid-liquid extraction process of Cd(II), allowing the efficient transfer of the toxic metal ion from the aqueous phase into the organic phase.
Parisa Abbasi, Angeliki A. Athanasopoulou, Eleni C. Mazarakioti, Kevin J. Gagnon, Simon J. Teat, Albert Escuer, Melanie Pilkington, and Theocharis C. Stamatatos
Royal Society of Chemistry (RSC)
A {Ni8} cluster with trapezoidal prismatic topology was prepared via the click reaction between MeCN and N3− ions.
Julia Mayans, Angeliki A. Athanasopoulou, Amy Trinh Pham, Mercè Font-Bardia, Eleni C. Mazarakioti, Melanie Pilkington, Theocharis C. Stamatatos, and Albert Escuer
Royal Society of Chemistry (RSC)
Unprecedented homometallic NiII cubanes have been prepared from chiral ligands. Their structures have been correlated with their magnetic properties.
Dimitris I. Alexandropoulos, Eleni C. Mazarakioti, Sergio A. Corrales, Jacob T. Bryant, Lev V. Gasparov, Christos Lampropoulos, and Theocharis C. Stamatatos
Elsevier BV
Eleni C. Mazarakioti, Jeffery Regier, Luís Cunha-Silva, Wolfgang Wernsdorfer, Melanie Pilkington, Jinkui Tang, and Theocharis C. Stamatatos
American Chemical Society (ACS)
The introduction of the Schiff base ligand N-salicylidene-2-amino-5-chlorobenzoic acid (sacbH2) in 4f-metal chemistry has afforded a new dinuclear complex, [Dy2(NO3)4(sacbH)2(H2O)2(MeCN)2] (1), with the metal ions adopting a rare spherical tricapped trigonal prismatic coordination geometry. The deprotonated phenoxido O atoms of the organic chelate occupy the axial triangular faces of the prism and were found to be very close to the main anisotropy axes of the two DyIII ions. As a result, the {DyIII2} compound exhibits frequency- and temperature-dependent out-of-phase ac signals below ∼25 K in the absence of a static dc field, yielding an energy barrier of 109.3(1) K for the reversal of magnetization. Fast and efficient quantum tunneling of magnetization, attributed to the strong tails of signals below ∼15 K, was suppressed through the application of a small dc field, yielding entirely visible χM″ signals below 27 K. Single-crystal magnetic hysteresis studies confirmed the single-molecule magnet (SMM) behavior of 1; the hysteresis loops appear at temperatures below ∼5 K, which is one of the highest blocking temperatures in the field of 4f-SMMs to date. This joint magneto-structural and ab initio study demonstrates the ability of more common coordination numbers (i.e., 9), but with rare coordination geometries (i.e., spherical tricapped trigonal prismatic), to promote axiality that enhances the molecular anisotropy and subsequently the magnetization dynamics of the system.
Eleni C. Mazarakioti, Luís Cunha-Silva, Vlasoula Bekiari, Albert Escuer, and Theocharis C. Stamatatos
Royal Society of Chemistry (RSC)
The employment of N-salicylidene-o-aminophenol in 4f-metal chemistry has led to a family of {Ln7} clusters with a new core topology, SMM behavior and ligand-centered emissions.
Eleni C. Mazarakioti, Katye M. Poole, Luis Cunha-Silva, George Christou, and Theocharis C. Stamatatos
Royal Society of Chemistry (RSC)
A new family of emissive Ln7 clusters with ideal D3h metal-centered trigonal prismatic topology and SMM behavior has been obtained.
Dimitris I. Alexandropoulos, Eleni C. Mazarakioti, Simon J. Teat, and Theocharis C. Stamatatos
Elsevier BV