Effect of flashing light from blue light emitting diodes on cell growth and astaxanthin production of Haematococcus pluvialis
| Autor: | Shigeo Katoh, Reza Ranjbar, Kazumichi Shimahara, Tomohisa Katsuda, Keisuke Yamagami, Hironori Shiraishi |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Light Photobioreactor Bioengineering Xanthophylls Applied Microbiology and Biotechnology law.invention chemistry.chemical_compound Bioreactors Chlorophyta law Astaxanthin Botany Lighting Cell Proliferation Diode Blue light Haematococcus pluvialis biology business.industry Flashing biology.organism_classification Ray Culture Media chemistry Optoelectronics business Biotechnology Light-emitting diode |
| Zdroj: | Journal of Bioscience and Bioengineering. 102:442-446 |
| ISSN: | 1389-1723 |
| DOI: | 10.1263/jbb.102.442 |
| Popis: | To conserve energy in the production of astaxanthin by the green alga Haematococcus pluvialis, we utilized intermittent flashing light from blue light emitting diodes (LEDs) and investigated the effects of the incident light intensity (2-12 micromol m(-2) s(-1)), duty cycle (17-67%) and frequency (25-200 Hz) of flashing on the cell growth and astaxanthin production. In the above ranges, the final astaxanthin concentration under illumination by flashing light was significantly higher than that obtained under illumination with continuous light at the same incident intensity. For example, flashing light at an incident intensity of 8 micromol m(-2) s(-1) gave the same final astaxanthin concentration that was obtained under continuous light illumination at 12 micromol m(-2) s(-1), thus reducing energy consumption by 1/3. We therefore conclude that flashing light from blue LEDs is a promising illumination method for indoor algal cultivation using photobioreactors. |
| Databáze: | OpenAIRE |
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