Lixia Fan

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Two novel cyclic hexapeptides, designated NW-G10 (1) and NW-G11 (2), were isolated from the fermentation broth of Streptomyces alboflavus 313. Their relative structures were elucidated on the basis of extensive spectroscopic analysis, and the absolute configurations of several constituent amino acids were determined by Marfey’s method. NW-G10 (1) and NW-G11(More)
S.M. Lee proposed the conjecture: for any n > 1 and any permutation f in S(n), the permutation graph P (P n , f) is graceful. For any integer n > 1 and permutation f in S(n), we discuss the gracefulness of the permutation graph P (P n , f) if f = l−1 k=0 (m + 2k, m + 2k + 1), and l−1 k=0 (m + 4k, m + 4k + 2)(m + 4k + 1, m + 4k + 3) for any positive integers(More)
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