Zobrazeno 1 - 10
of 292
pro vyhledávání: '"T.A. Geissman"'
Publikováno v:
Phytochemistry. 16:1177-1181
Thirty-six sesquiterpene lactones and related compounds were evaluated for antimicrobial activity against six strains of bacteria. The results obtained show that the beta unsubstituted cyclopentenone ring moiety contributes to moderate antimicrobial
Autor:
Thomas G. Waddell, Andrew T. McPhail, Key D. Onan, Lee Kuo-Hsiung, Toshiro Ibuka, T.A. Geissman
Publikováno v:
Tetrahedron Letters. 15:1149-1152
Autor:
T.A. Geissman, T. Saitoh
Publikováno v:
Phytochemistry. 11:1157-1160
Artemisia ludoviciana Nutt. ssp. albula (Woot.) Keck, a member of the vulgaris complex, contains a sesquiterpene lactone, ludalbin, which is 8-α-acetoxydouglanine.
Publikováno v:
Phytochemistry. 10:411-417
Three additional lactones, two of them new, have been isolated from extracts of Castela nicholsoni Hook. from which chaparrin, glaucarubol, glaucarubol 15-isovalerate and amarolide have previously been obtained. The structures and stereochemistry of
Autor:
Eugene C. Jorgensen, T.A. Geissman
Publikováno v:
Archives of Biochemistry and Biophysics. 54:72-82
Publikováno v:
Phytochemistry. 6:807-814
The formation of radioactive gibberellins from (−)kaurenol ((−)kaur-16-en-19-ol) in cultures of Gibberella fujikuroi has been found to resemble that from (−)kaurenoic acid. Evidence for an intermediate step in the pathway to gibberellic acid (G
Publikováno v:
Tetrahedron Letters. 10:1313-1316
Autor:
T.A. Geissman, M.A. Irwin
Publikováno v:
Phytochemistry. 12:849-852
Artemisia pygmaea Gray contains two sesquiterpene alcohols: the known cryptomeridiol (I) and pygmol (II), a new compound. No sesquiterpene lactones were found in the plant although other species of the section Tridentatae Rydb., with which A. pygmaea
Autor:
T.A. Geissman
Publikováno v:
Archives of Biochemistry and Biophysics. 60:21-26
1. 1. Normal and virus-infected peach and cherry leaves have been examined for their flavonoid constituents. Glycosides of kampferol and quercetin and esters of p -coumaric and caffeic acids were identified in peach leaves; p -coumaric acid was ident
Publikováno v:
Tetrahedron Letters. 7:1245-1249