IMEKO Event Proceedings Search

   

Page 316 of 977 Results 3151 - 3160 of 9762

Fabjola Bilo, Laura Borgese, Rogerta Dalipi, Annalisa Zacco, Elza Bontempi, Laura E. Depero
A Smart Sample Preparation Method For Chocolate Analysis

Fast, simple and reliable methods are necessary for quality control of food sample that will guarantee the food safety and human health. Total reflection X-Ray Fluorescence (TXRF) spectroscopy is suitable for elemental analysis of food, since it provides simultaneous multielemental identification in a wide dynamic range of concentration. Moreover, TXRF is successfully applied for sample screening. This study proposes a new approach of sample preparation procedure developed by Smart Store for elemental chemical analysis of foods by means of TXRF. The method consists in sandwiching the chocolate sample into two polymeric foils, free from heavy metals content, allowing to protect it from external contamination, to avoid any material loss and to store it for further investigations. After preparation, the samples can be directly analysed. Furthermore, in this work the total solubilisation of the samples by microwave acid digestion was performed. Quantitative analysis by means of internal standard addition was performed for all samples. Good agreement results was achieved for both sample preparation procedures.

Roberto Piro, Emanuele Sangiorgi
Nutritional Mineral in Foods by TXRF: an easy, fast and reliable approach for food characterization

The mineral nutritional values of foods is an important aspect that should be considered (especially the intake for iron, calcium, potassium, manganese, copper, chromium and zinc) to obtain a correct balanced diet, that is essential to maintaining good health. In the literature there are many information on mineral content of different foods, but due to the high analytical costs of traditional methods (AAS, ICP-MS) in the real world, only few data are routinely produced. The use of an alternative cheap analytical technique as TXRF can help to overcome this knowledge gaps.

Emanuele Sangiorgi, Roberto Piro
TXRF Analysis of Food and Beverages: the IZSLER experience

TXRF (Total X-Ray Reflection Fluorescence) is a simple and fast method to analyse element. Different types of food and beverages were analysed with TXRF to verify the concentration of some elements and to point out possibly differences of composition. Encouraging results were obtained in combination to multivariate analysis of data too.

Finizia Russo, Vittoria Lombardi, Carmina Viola, Maria Carmela Polese, Elena Coccia, Marina Paolucci, Ettore Varricchio
Use of Polyphenols Extracted by Olive Mill Wastewater as Dietary Supplements in Pig: Effects on Gut Associated Lymphoid Tissue, Blood Leukocytes and Alveolar Macrophages

The polyphenols are able to reduce the amount of free radicals and stimulate the immune response. In this study, polyphenols extracted from olive mill wastewaters, were fed to pigs for three months. Morphological, inflammation and immunological parameters were evaluated. Historical samples of gastrointestial tracts were analyzed for immunodetection of cyclooxygenase-2; superoxide anion production in primary cell cultures of blood leukocytes and alveolar macrophages was measured.

Maria Carmela Polese, Finizia Russo, Carmina Viola, Elena Coccia, Marina Paolucci, Ettore Varricchio
Use of Polyphenols Extracted by Olive Mill Wastewater as Dietary Supplements in Pig: Effects on Meat Storage and Quality

The oil industry, which is one of the leading agro-industrial sectors in the Mediterranean area and Campania Region, generates large amounts of olive mill wastewaters (OMWW) characterized by the presence of phenolic compounds which slow down its biodegradation.

Elena Coccia, Lucia Parrillo, Carmina Viola, Finizia Russo, Maria Carmela Polese, Ettore Varricchio, Marina Paolucci
Use of Polyphenols Extracted from Agricultural Waste By-Product as Dietary Supplement in Aquaculture

Agricultural waste by-product are a rich source of biomolecules with antimicrobial, immunostimulant, anti-tumoral and anti-oxidants properties. The use of polyphenols extracted from these by-products as dietary supplements in animal feed may improve the health of animals thus limiting the use of antibiotics. We used the polyphenols extracted from the skin of chestnuts, of which Campania is the main producer, in order to evaluate a possible immunostimulant activity on leucocytes isolated from blood and GALT of the rainbow trout Oncorhynchus mykiss.

Michelangelo Pascale, Angelo Visconti, Annalisa De Girolamo, Veronica M.T. Lattanzio, Vincenzo Lippolis
Development and Validation of Analytical Methods for the Determination of Mycotoxins in Food

For enforcement purposes and for reliable surveillance programs, the availability of validated methods for determining food contaminants with performance characteristics that meet certain minimum criteria is mandatory. A brief overview of recent activities carried out at the Institute of Sciences of Food production, National Research Council of Italy (ISPA-CNR) on the development and validation of analytical methods for the determination of mycotoxins in food is presented.

Luana Bontempo, Luca Ziller, Federica Camin
Reference Materials and Calibration for Stable Isotope Ratio Analysis in Food

The stable isotope ratios of the five bio elements carbon, nitrogen, hydrogen, oxygen and sulphur have frequently been used in the last few decades to determine the authenticity and traceability of many food commodities. In this paper, issues regarding calibration, suitable reference materials and correct methods to obtain reliable results with this potentially powerful technique are critically discussed and commented.

Ekaterina Epova, Sylvain Bérail, Bernard Médina, Julien Barre
Potential of Multi-Element Isotopic Approach for Geographical Origin Discrimination of Tea

The determination of strontium and lead isotope abundance ratios by MC-ICP-MS (multicollection inductively coupled plasma mass spectrometry) has been applied to 28 authentic teas from various origin. A noticeably different value of 87Sr/86Sr has been obtained for Japanese tea. A distinctive trend of Pb-isotope ratios has been observed for the different geographic regions of sample origin. The combination of isotopic and elemental concentrations tremendously increases the discrimination possibilities compared to a single isotopic or elemental system.

Anja Mahne Opatic, Marijan Necemer, Sonja Lojen
Determination of The Geographical Origin of Slovenian Potato and Garlic, Based on Stable Isotope and Elemental Analyses-Preliminary Results

In this study, the applicability of stable isotope (δ13C, δ15N, δ34S, δ18O) and multi-element (K, P, S, Cl, Ca, Si, Zn, Br, Rb, Sr, Ti) data for determining the geographical origin of Slovenian organic garlic (Allium sativum L.) and potato (Solanum tuberosum L.) was examined. The discriminant analysis (DA) of obtained data suggested a distinction of four macroregions (the Alpine, the Dinaric, the Mediterranean and the Pannonian). The most significant parameters for separation were δ13C, δ34S, Zn, P and Cl in garlic and δ13C, δ18O, δ34S, K, Cl and Ca in potato.

Page 316 of 977 Results 3151 - 3160 of 9762