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Essential Oils as Allelochemicals and Their Potential Use as Bioherbicides (1999)

Dudai, N. ; Poljakoff-Mayber, A. ; Mayer, A. M. ; [et al.]

Springer

Journal of chemical ecology 25 (1999), S. 1079-1089

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ISSN: 1573-1561

Keywords: Allelochemicals ; carvacrol ; citral ; essential oils ; geranial ; herbicides ; inhibition of germination ; pulegone

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology

Notes: Abstract Essential oils were extracted from 32 aromatic plants and evaluated for allelopathic properties. The major components of the oils were identified by gas chromatography and GC-MS. Extracts from Origanum syriacum, Micromeria fruticosa, and Cymbopogon citratus were selected for further study. The germination of several species, including wheat, was strongly inhibited by essential oils when applied at 20–80 ppm. Essential oils mixed with the top 0.5 cm of soil inhibited germination of wheat and Amaranthus seeds. This effect depended on the type of soil. The possible use of essential oils as herbicides is discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1020881825669

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Problems of design and ecological considerations in mass culture of algae (1964)

Mayer, A. M. ; Zuri, U. ; Shain, Y. ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 6 (1964), S. 173-190

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ISSN: 0006-3592

Keywords: Chemistry ; Biochemistry and Biotechnology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology

Notes: A 2000 l. 1 m. deep mass culture of algae was operated with continuous stirring, as an open system. The system behaved as an ecological unit selecting the most favored species. The ecological conditions could be modified by stirring speed and pattern in the tank. Methods for improving yields and utilization of CO2 are described. Assessment of algal species for suitability in mass cultures is discussed. Yields obtained were 13 g. dry matter/sq. m. illuminated area/day.

Additional Material: 5 Ill.