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  • 1
    Publication Date: 2002-03-01
    Print ISSN: 0040-4039
    Electronic ISSN: 1873-3581
    Topics: Chemistry and Pharmacology
    Published by Elsevier
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  • 2
    ISSN: 1573-0832
    Keywords: deoxynivalenol ; enzyme immunoassay ; feed ; maize ; mycotoxins ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Samples of wheat (n = 25) and maize (n = 30) for animal consumption, collected in 1997 after harvest from western Romania, were analyzed by enzyme immunoassays for mycotoxin contamination. Toxins analyses included deoxynivalenol (DON), 3-acetylDON, 15- acetylDON, fusarenone X (FX), T-2 Toxin (T-2), diacetoxyscirpenol (DAS), zearalenone (ZEA), fumonisin B1 (FB1), aflatoxin B1 (AFB1), ochratoxin A (OA), and citrinin (CT). DON and acetylDONs were the major contaminants in wheat (100%) and maize (46%). Median values for DON, 3-acetylDON, and 15-acetylDON were 880 μg kg-1, 66 μg kg- 1, and 150 μg kg-1 in wheat, and 890 μg kg-1, 180 μg kg-1, and 620 μg kg- 1 in maize, respectively. Additionally, 3,15-diacetylDON was detected in some samples by HPLC-EIA analysis. All samples were negative for FX (〈150 μg kg-1). T-2 was found in wheat (n = 6) and maize (n = 1) at levels between 13 and 63 μg kg- 1. DAS (2.6 μg kg-1) was found in one maize sample. ZEA occurred in all wheat and in four maize samples, median values were 10 μg kg-1 and 250 μg kg-1, respectively. One maize sample contained FB1 (140 μg kg-1). All samples were AFB1-negative (〈4 μg kg-1). OA was found in one wheat sample (37 μg kg- 1), CT was found in one maize sample (580 μg kg- 1). This first reported natural occurrence of a range of mycotoxins in Romanian feeding stuff shows that DON and acetyl DONs may be present at levels which may affect animal production.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 1753-1762 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dakin West Reaction, IV1). - Reaction of α-Amino Dicarboxylic Acids with Carboxylic Acid Anhydrides2)The Dakin West reaction of N-acylaspartic anhydrides yields furo[3,2-d]oxazoles 5 and 14, 2(5H)-furanones 8 or 6H-1,3-oxazin-6-ones 9, depending on the reaction conditions. N-Thiobenzoylaspartic acid is converted into 6H-1,3-thiazin-6-one (12) by treatment with acetic anhydride and 3-picoline. Glutamic acid gives 1,5-diacetyl-2-pyrrolidone (22) in high yield on warming with acetic anhydride and 4-(dimethylamino)pyridine. Possible mechanisms for the formation of the different products are discussed.
    Notes: N-Acylasparaginsäureanhydride liefern bei der Dakin-West-Reaktion je nach den Reaktionsbedingungen Furo[3,2-d]oxazole 5 und 14, 2(5H)-Furanone 8 oder 6H-1,3-Oxazin-6-one 9. Aus N-Thiobenzoylasparaginsäure, Acetanhydrid und 3-Picolin entsteht das 6H-1,3-Thiazin-6-on (12). Glutaminsäure wird von Acetanhydrid und 4-(Dimethylamino)pyridin in guter Ausbeute in 1,5-Diacetyl-2-pyrrolidon (22) übergeführt. Mechanismen für die Bildung der verschiedenen Produkte werden diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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