Pesticide Residues and Their Metabolites in Grapes and Wines from Conventional and Organic Farming System

In this study, the occurrence of pesticide residues and their metabolites in grapes and wines was investigated. A targeted analysis of 406 pesticide residues in 49 wine and grape samples from organic and conventional production were performed using the QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) extraction method, followed by ultra-high-performance liquid chromatography coupled with tandem mass spectrometry. Multiple residues (>4 residues/sample) were detected in 22 tested samples. The most commonly detected residues were fungicides (e.g., boscalid) and insecticides (e.g., methoxyfenozide). An ultra-high-performance liquid chromatography–high resolution mass spectrometry method (UHPLC–(HR)MS) was used for screening of pesticide metabolites. We also provide a method and database for detecting pesticide metabolites (extending our previously published database to 49 metabolites originating from 25 pesticides). An introduced strategy of targeted screening of pesticide metabolites was applied for authentication of 27 organic grapes and wines. In total, 23 samples were free of quantifiable residues/detected metabolites or contained residues approved for organic production

Cranberries versus lingonberries: A challenging authentication of similar Vaccinium fruit

Due to unique phytochemicals contained, Vaccinum berries are known to have a number of positive health effects. In this context, lingonberries (Vaccinium vitis-idaea) are considered to be the most effective, thus finding many uses. Recently, fraud suspicion on lingonberries-based products has been reported, partial or even total replacement by less valued cranberries (Vaccinium macrocarpon) was found. In this study, metabolomic fingerprinting employing instrumental platform consisting of U-HPLC-HRMS/MS was investigated for discrimination between the two Vaccinum berries species. Methanolic extracts of 33 authentic samples from two harvest years were analyzed and chemometric evaluation was performed to identify significant marker compounds, their stability during drying process was assessed, too. The characteristic markers most contributing to berries classification were representatives of polyphenols and phospholipids. Peonidin 3-O-arabinoside and myricetin 3-O-glucoside, not occurring in lingonberries, enabled to discover the presence of cranberries in prepared admixtures down to 1% (w/w)

Concurrent bandgap narrowing and polarization enhancement in epitaxial ferroelectric nanofilms

| openaire: EC/FP7/307502/EU//E-CONTROLPeer reviewe

Pesticide residues in fresh and processed edible mushrooms from Czech markets

The occurrence of pesticide residues, their metabolites and degradation products in 49 edible mushrooms (fresh, dried, canned and frozen) was investigated. Using QuEChERS extraction, followed by liquid and gas chromatography coupled with tandem mass spectrometry, the samples collected from Czech markets were tested for 427 analytes. A total of 21 pesticide residues, their metabolites and pesticide synergists were found in quantifiable concentrations. The most frequently detected pesticide residues included prochloraz and its metabolites, metrafenone and carbendazim. Two mushroom samples were found to be in violation of the maximum residue level. In addition, the fate of 13 pesticides during the processing of fresh mushrooms was investigated. The processing factors calculated from the data ranged from 6.0 to 12.3 for drying and from 0.3 to 1.3 for deep-freezing. The results showed that most of the pesticide residues tested were stable under the conditions of mushroom processing.</p

Past in the Making

Historical revisionism, far from being restricted to small groups of ‘negationists,’ has galvanized debates in the realm of recent history. The studies in this book range from general accounts of the background of recent historical revisionism to focused analyses of particular debates or social-cultural phenomena in individual Central European countries, from Germany to Ukraine and Estonia. Where is the borderline between legitimate re-examination of historical interpretations and attempts to rewrite history in a politically motivated way that downgrades or denies essential historical facts? How do the traditional ‘national historical narratives’ react to the ‘spill-over’ of international and political controversies into their ‘sphere of influence’? Technological progress, along with the overall social and cultural decentralization shatters the old hierarchies of academic historical knowledge under the banner of culture of memory, and breeds an unequalled democratization in historical representation. This book offers a unique approach based on the provocative and instigating intersection of scholarly research, its political appropriations, and social reflection from a representative sample of Central and East European countries