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Bjorn Berendsen Linda Stolker Jacob de Jong Michel Nielen Enkhtuya Tserendorj Ruuragchas Sodnomdarjaa Andrew Cannavan Christopher Elliott 《Analytical and bioanalytical chemistry》2010,397(5):1955-1963
Chloramphenicol (CAP), a broad-spectrum antibiotic, was detected in several herb and grass samples from different geographic
origins. Due to its suspected carcinogenicity and linkages with the development of aplastic anemia in humans, CAP is banned
for use in food-producing animals in the European Union (EU) and many other countries. However, products of animal origin
originating from Asian countries entering the European market are still found noncompliant (containing CAP) on a regular basis,
even when there is no history of chloramphenicol use in these countries. A possible explanation for the continued detection
of these residues is the natural occurrence of CAP in plant material which is used as animal feed, with the consequent transfer
of the substance to the animal tissues. Approximately 110 samples were analyzed using liquid chromatography coupled with mass
spectrometric detection. In 26 samples, the presence of CAP was confirmed using the criteria for banned substances defined
by the EU. Among other plant materials, samples of the Artemisia family retrieved from Mongolia and from Utah, USA, and a
therapeutic herb mixture obtained from local stores in the Netherlands proved to contain CAP at levels ranging from 0.1 to
450 μg/kg. These findings may have a major impact in relation to international trade and safety to the consumer. The results
of this study demonstrate that noncompliant findings in animal-derived food products may in part be due to the natural occurrence
of chloramphenicol in plant material. This has implications for the application of current EU, USA, and other legislation
and the interpretation of analytical results with respect to the consideration of CAP as a xenobiotic veterinary drug residue
and the regulatory actions taken upon its detection in food. 相似文献
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In this paper, we establish several new Hilbert-type inequalities with a homogeneous kernel, involving arithmetic, geometric, and harmonic mean operators in both integral and discrete case. Such inequalities are derived by virtue of some recent results regarding general Hilbert-type inequalities and some well-known classical inequalities. We also prove that the constant factors appearing in established inequalities are the best possible. As an application, we consider some particular settings and compare our results with previously known from the literature. 相似文献
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Vandanjav Adiyasuren Tserendorj Batbold Yoshihiro Sawano 《Mediterranean Journal of Mathematics》2016,13(6):3837-3848
We present a multidimensional integral inequality related to the Hilbert-type inequality and the Carlson-type inequality. As an application, we obtain a sharper form of the Hilbert-type inequality. Carlson-type inequality is also considered. 相似文献
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