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Echinacea standardization: analytical methods for phenolic compounds and typical levels in medicinal species.
A proposed standard extraction and HPLC analysis method has been used to measure typical levels of various phenolic compounds in the medicinally used Echinacea species. Chicoric acid was the mainExpand
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Essential oils from dalmatian sage (Salvia officinalis l.): variations among individuals, plant parts, seasons, and sites.
The factors affecting oil yield and quality of essential oils from Dalmatian sage (Salvia officinalis L.) are analyzed. Distillations of oils from individual plants and GC analyses revealed theExpand
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Extraction of phenolics and essential oil from dried sage (Salvia officinalis) using ethanol–water mixtures
Abstract Effects of particle size, temperature, contact time, solvent-to-sage ratio and the ethanol–water ratio on the extraction of the active compounds rosmarinic acid, carnosic compounds andExpand
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Essential oils from New Zealand manuka: triketone and other chemotypes of Leptospermum scoparium.
The triketone chemotype of manuka, Leptospermum scoparium (Myrtaceae), is commercially important because of its antimicrobial activity. Oils from 36 individual plants on the East Cape of New ZealandExpand
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Essential oils from New Zealand manuka and kanuka: Chemotaxonomy of Leptospermum
Standardized steam distillation and GC analytical methods for oils from manuka, Leptospermum scoparium, are described. These methods were used to analyse two oils from each of 15 L. scopariumExpand
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Alkamide levels in Echinacea purpurea: a rapid analytical method revealing differences among roots, rhizomes, stems, leaves and flowers.
A rapid extraction, clean-up, and RPLC procedure suitable for routine quantitative analyses of alkamide levels in Echinacea purpurea extracts is described. The 13C-NMR spectra of the main diene-diyneExpand
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Antiviral and antitumor agents from a new zealand sponge mycale sp 2. structures and solution conformations of mycalamides a and b
Mycalamide B has been found to occur with mycalamide A in a New Zealand sponge of the genus Mycale. Both are potent antiviral and antitumor agents. The solution conformations of mycalamide A haveExpand
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Seasonal variation in essential oil yield and composition from naturalized thymus vulgaris L. in New Zealand
The seasonal variation in essential oil yield and composition from naturalized Thymus vulgaris L. in Central Otago, New Zealand, is reported. Essential oil yield (l/ha), from replicated, pilot-scaleExpand
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