Chemical Composition and Biological Activities of Essential Oils from the Oleogum Resins of Three Endemic Soqotraen Boswellia Species
The chemical composition, antioxidant and anticholinesterase activity of three essential oils (EOs) obtained from the oleogum resin of three endemic Sqotraen Boswellia species, Boswellia socotrana…
Chemical Composition and Biological Activity of Essential Oil from Pulicaria undulata from Yemen
The essential oil showed moderate cytotoxic activity against MCF-7 breast tumor cells, with an IC50 of 64.6 ±13.7 μg/mL, and showed the strongest bactericidal activity against Staphylococcus aureus and methicillin-resistant S. aUREus, as well as Candida albicans.
Acetylcholinesterase inhibitors from the toadstool Cortinarius infractus.
Synthesis of fluorochromes and pigments in Malassezia furfur by use of tryptophan as the single nitrogen source
- P. Mayser, G. Wille, A. Imkampe, W. Thoma, N. Arnold, T. Monsees
- BiologyMycoses (Berlin)
- 1 September 1998
It is hypothesized that in pityriasis versicolor metabolic adaptation of Malassezia yeasts to altered nitrogen conditions on superficial skin might be of patho‐physiological importance, and Tryptophan as an inducer of pigmentogenesis probably accumulates during excessive sweating.
Helicascolide C, a new lactone from an Indonesian marine algicolous strain of Daldinia eschscholzii (Xylariaceae, Ascomycota)
Chemical Composition of the Essential Oil of Teucrium yemense Deflers
The chemical composition of the essential oil (EO) obtained by hydrodistillation from the leaves of Teucrium yemense Deflers was determined by GC-MS. Twelve compounds accounting to 77.7% of the total…
Composition of Essential Oil from Tagetes minuta and its Cytotoxic, Antioxidant and Antimicrobial Activities
- N. A. A. Ali, F. Sharopov, L. Wessjohann
- Chemistry, MedicineNatural Product Communications
- 1 February 2014
The essential oil from the leaves of Tagetes minuta L., growing wild in Yemen, was obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry, and the essential oil exhibited high activity against methicillin-resistant Staphylococcus aureus and remarkable antifungal activity against Candida albicans.
Structure and Absolute Configuration of Pseudohygrophorones A(12) and B(12), Alkyl Cyclohexenone Derivatives from Hygrophorus abieticola (Basidiomycetes).
- Alexander Otto, A. Porzel, Jürgen Schmidt, W. Brandt, L. Wessjohann, N. Arnold
- ChemistryJournal of Natural Products
- 22 January 2016
The isolated compounds 1-3 exhibited pronounced activity against phytopathogenic organisms and a clear distinction between the pseudohygrophorones (1 and 2) and hygrophorone B(12) (3).
Chemical Composition, Antimicrobial, Antioxidant and Cytotoxic Activity of Essential Oils of Plectranthus cylindraceus and Meriandra benghalensis from Yemen
The chemical composition, antimicrobial, antioxidant and cytotoxic activities of the essential oils isolated from the leaves of Plectranthus cylindraceus Hoechst. ex. Benth. (EOPC) and Meriandra…
Methylated derivatives of myricetin enhance life span in Caenorhabditis elegans dependent on the transcription factor DAF-16.
Findings suggest that methylation of myricetin increases the biofunctionality and free OH moieties in the B-ring are not necessary for the life span extending effect.