There are extended wind-blown sand territories in the northeastern part of the Great Hungarian Plain. Wind-blown sand migration periods were distineuished by means of radiocarbon age determination of charcoal samples found in the same type of a thin soil layer of chernozem character in different sand dune exposures. The ages of the samples were determined by proportional counter, and are around 12 000 years BP. This thin fossil soil layer, which is regionally spread in the northeast Hungarian wind-blown sand areas, presents a chronological mark between the blown sand forms evolved in the last glacial period and in the Holocene.
Die Addition von Hydrogensulfid an die entsprechenden acetylierten Aldonitrile liefert in 63‐88%iger Ausbeute die Thioamide (I) bis (IV), von denen (I) mit dem Chlorid (V) bzw. (III) mit dem Bromid (VII) zu den Thiazolen (VI) (27%) bzw. (VIII) (23%) reagiert.
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