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- Publications
- Influence
Factors affecting secondary metabolite production in plants: volatile components and essential oils
- A. Figueiredo, J. Barroso, L. G. Pedro, J. Scheffer
- Chemistry
- 1 July 2008
The presence, yield and composition of secondary metabolites in plants, viz. the volatile components and those occurring in essential oils, can be affected in a number of ways, from their formation… Expand
Antimicrobial activities of essential oils
- A. Janssen, J. Scheffer, A. Svendsen
- Medicine
- Pharmaceutisch Weekblad
- 21 August 1987
The testing of essential oils for antimicrobial activities is reviewed with respect to various possible applications. Consideration is given to the screening for antimicrobially active oils or… Expand
Analytical Aspects of Phytotherapeutic Valerian Preparations
- R. Bos, H. J. Woerdenbag, +5 authors J. Scheffer
- Chemistry
- 1 May 1996
A high performance liquid chromatographic method combined with diode array detection is described by which the valerian constituents valtrate, isovaltrate, acevaltrate, didrovaltrate,… Expand
Hairy root cultures of Anethum graveolens (dill): establishment, growth, time-course study of their essential oil and its comparison with parent plant oils
- P. A. Santos, A. Figueiredo, +6 authors J. Scheffer
- Biology
- Biotechnology Letters
- 9 May 2002
Transformed root cultures of Anethum graveolens were induced by inoculation of aseptically grown seedlings with Agrobacterium rhizogenes carrying plasmid pRi 1855. The main component of the essential… Expand
Essential oils from seven populations of Juniperus brevifolia (Seub.) Antoine, an endemic species of the Azores.
- J. A. D. Silva, L. G. Pedro, +7 authors J. Scheffer
- Chemistry
- 2000
The composition of the essential oils isolated from twigs and from unripe berries of seven populations of Juniperus brevifolia (Seub.) Antoine, an endemic species of the Azorean archipelago, was… Expand
The essential oil of Ducrosia anethifolia (DC.) Boiss
- A. Janssen, J. Scheffer, A. Svendsen, Y. Aynehchi
- Chemistry, Medicine
- Pharmaceutisch Weekblad
- 1 August 1984
The essential oil from herb ofDucrosia anethifolia (DC.) Boiss., growing wild in Iran, was investigated by LSC, GLC and GC-MS. The oil consisted mainly of aliphatic compounds. α-Pinene, myrcene and… Expand
Composition of the essential oil of Ocimum canum grown in Rwanda
- L. Ntezurubanza, J. Scheffer, A. Looman
- Chemistry, Medicine
- Pharmaceutisch Weekblad
- 13 December 1985
The essential oil from leaves and flowers ofOcimum canum Sims, growing wild in Rwanda, was investigated by LSC, GLC and GC-MS. All samples were characterized by a high content of linalool (60–90%).… Expand
Composition of the essential oil of Hypericum foliosum Aiton from five Azorean islands
- Pedro A. Santos, A. Figueiredo, J. Barroso, L. G. Pedro, J. Scheffer
- Chemistry
- 1 September 1999
Eight collective samples of terminal cymose inflorescences of Hypericum foliosum Aiton were collected on five islands of the Azores (S. Jorge. S. Miguel, Pico, Terceira and Faial). The essential oils… Expand
Formation of aromatic intermediates in the biosynthesis of bitter acids in Humulus lupulus
- K. W. Zuurbier, S. Fung, J. Scheffer, R. Verpoorte
- Chemistry
- 1995
Abstract A new hypothesis concerning the formation of aromatic intermediates in the biosynthesis of hop bitter acids was tested. Two phloroglucinol derivatives,… Expand