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Journal article
Chemical constituents from Penianthus camerounensis Dekker (Menispermaceae)
The phytochemical study of the roots, leaves and twigs of Penianthus camerounensis Dekker (Menispermaceae) has led to the isolation and the characterization of 20 compounds. A ceramide, camerounamide (1), and a furoclerodanediterpenoid, camerounin (2), have not been described previously, while the compounds xylopic acid (3), syringaresinol (4), iso-propylmethylcyclohexa-1,4-diol (5), 1-(28-hydroxyoctacosanoyl)glycerol... -
Journal article
Melanin Production Inhibitors from the West African Cassipourea congoensis
Cassipourea congoensis (syn. Cassipourea malosana) is used in African countries as a skin-lightening agent. Two previously unreported cycloartane triterpenoids, 26-hydroxy-3-keto-24-methylenecycloartan-30-oic acid 1 and 24-methylenecycloartan-3β,26,30-triol 2 along with the known mahuannin B 3, 7-methoxymahuannin B 4, 7-methoxygeranin A 5, methyl-3-(4-hydroxy-3-methoxyphenyl)-2E-propenoate, glycerol-1-alkanoate, (E)-3-(4-hydroxy-3-methoxyphenyl)prop-2-enal 6, (-)-syringaresinol 7, and stigmast-5-en-3-O-β-D-glucoside, were isolated from the... -
Journal article
The chemistry and biological activities of Citrus clementina Hort. Ex Tanaka (Rutaceae), a vegetatively propagated species
We report the chemistry and biological activities of a Cameroonian Citrus clementina Hort. Ex Tanaka, a vegetatively propagated species. The compounds isolated from this plant were determined to be the known 5-hydroxy-6,7,8,3’,4’-pentamethoxyflavone (1), tangerine (3), nobilletin (4), 5,7,8,4’-tetramethoxyflavone (5), citracridone I (6), 5-hydroxynoracronycine (7), citracridone III (8), xanthyletin (10), suberosin... -
Journal article
The chemistry of the West and Central African Penianthus zenkeri Diels (Menispermaceae)
A phytochemical investigation of the roots and twigs of Penianthus zenkeri Diels led to the identification of twenty four compounds including one previously undescribed C-28 ecdysteroid (1) and previously described phytosteroids (2–5, 20, 22, 23), phenolic compounds (6–8, 12), diterpenoids (9–11), alkaloids (13,14, 18, 19), a dipeptide (15), ursane type...Tabekoueng, Georges Bellier ; Akak, Carine Mvot ; Happi, Gervais Mouthé ; Langat, Moses K. ; Frese, Marcel …
Penianthuszenkeri, C-28 ecdysteroid, Zenkersterone, Rubrosterone, and Diterpenoids
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Journal article
First report of compounds from an Ancistrocarpus species: Triterpenoids from A. densispinosus Oliv. (Malvaceae)
The stem bark of Ancistrocarpus densispinosus Oliv. exhibited triterpenoids, including the rare fernane-type, fern-9(11)-ene-2α,3β-diol (1) a possible chemotaxonomically distinct biomolecule for the genus. Other triterpenoids that were isolated from this plant include the ursane-type ursolic acid (2) and corosolic acid (3), friedelane-type friedelin (4) and canophyllol (5), lupane-type lupeol (6),... -
Journal article
Comparative Plastid Genomics of Neotropical Bulbophyllum (Orchidaceae; Epidendroideae)
Pantropical Bulbophyllum, with ∼2,200 species, is one of the largest genera in Orchidaceae. Although phylogenetics and taxonomy of the ∼60 American species in the genus are generally well understood, some species complexes need more study to clearly delimit their component species and provide information about their evolutionary history. Previous research... -
Journal article
Two new species of Pittosporum (Pittosporaceae) for the Flora of Thailand
Two new species of Pittosporum (Pittosporaceae) are reported for Thailand. Pittosporum lacrymasepalum from Trat Province and P. maxwellii from Doi Inthanon, Chiang Mai Province are described and illustrated.Utteridge, Timothy M. A. ; Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, U.K.
taxonomy, Trat, Apiales, conservation assessment, and Doi Inthanon
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Journal article
Mapping mycological ignorance – checklists and diversity patterns of fungi known for West Africa
Scientific information about biodiversity distribution is indispensable for nature conservation and sustainable management of natural resources. For several groups of animals and plants, such data are available, but for fungi, especially in tropical regions like West Africa, they are mostly missing. Here, information for West African countries about species diversity... -
Journal article
The Egyptian Ascomycota 1: Genus Aspergillus
Since Pier Antonio Micheli described and published genus Aspergillus in Nova Plantarum Genera in 1729 the genus attracted an immense interest. The published Egyptian literature on the genus is scattered and fragmentary. By screening the available sources of information since 1921, it was possible to figure out a range of...Abdel-Azeem, Ahmed ; Abu-Elsaoud, Abdelghafar ; Darwish, Amira ; Balbool, Bassem ; Abo Nouh, Fatma …
check-list, Moubasher, Novel taxa, Biodiversity, Literature, Taxonomy, and Herbaria catalogues
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Journal article
Unambiguous identification of fungi: where do we stand and how accurate and precise is fungal DNA barcoding?
True fungi (Fungi) and fungus-like organisms (e.g. Mycetozoa, Oomycota) constitute the second largest group of organisms based on global richness estimates, with around 3 million predicted species. Compared to plants and animals, fungi have simple body plans with often morphologically and ecologically obscure structures. This poses challenges for accurate and...