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1,6-Di-S-methyl-1,6-dithio-D-fructofuranose and its bis(S-oxide) and bis(S,S-dioxide) are described. On examination for sweetness, the oxygenated compounds were neutral but the parent compound was 15-20 times sweeter than sucrose, and 1',6'-di-S-methyl-1',6'-dithiosucrose was slightly less sweet than sucrose.
This paper combines incoming lines with 500kv GIS substation, considering the influence of the impulse voltage-second characteristics of insulator strings, the impulse corona of incoming lines, the impulse grounding resistance of tower and the position of lightning. ATP-EMTP simulation program is applied to analyze the lightning over-voltage of 500kv GIS… (More)
Application of 99% formic acid at 25 degrees formylates primary hydroxyl groups as shown by the easy formation of 6-O-formyl-D-glucopyranose and 6-O-formyl-D-fructofuranose, isolated as their tetra-acetates in yields of 77% and 31%, respectively. Likewise, D-glucitol gave the 2,3,4,5-tetra-O-acetyl-1,6-di-O-formyl derivative (84%) and methyl… (More)