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Abstract:In order to investigate the compatibility of the candidate structural materials with liquid metals, two kinds of ferritic/martensitic steels were chosen to contact with lead-bismuth eutectic in sealed quartz glass tubes. The corrosion process lasted for 500 h and 3000 h. Results showed that the oxidation layer and carbide dissolution layer on the two steels grew with contact time under oxygen unsaturated condition. Short-term corrosion behavior of SIMP showed better lead-bismuth eutectic corrosion resistance than T91 at 873 K.

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Two new xanthones, designated garcimangosxanthone F (1) and garcimangosxanthone G (2), were isolated from the EtOAc-soluble fraction of ethanolic extract from the pericarp of Garcinia mangostana. Their structures were established as 1,6,7-trihydroxy-5-(3-methylbut-2-enyl)-8-(3-hydroxy-3-methylbutyl)-6',6'-dimethylpyrano[2',3':3,2]xanthone and 1,6,7-trihydroxy-5-(3-methylbut-2-enyl)-8-(3-hydroxy-3-methylbutyl)-6',6'-dimethyl-4',5'-dihydropyrano[2',3':3,2]xanthone, respectively, on the basis of their 1D, 2D NMR and MS data interpretation.