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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hon-Nami, Koyu |
| Description | Country affiliation: Japan Author Affiliation: Hon-Nami K ( Engineering R&D division, Tokyo Electric Power Co. Ltd., 1-1-3 Uchisaiwai-cho, Chiyoda-ku, 100-8560 Tokyo, Japan. koyu.honnami@tepco.co.jp) |
| Abstract | A unicellular marine green alga, Chlamydomonas perigranulata, was demonstrated to synthesize starch through photosynthesis, store it in a cell, and ferment it under anaerobic conditions in the dark to produce ethanol, 2,3-butanediol (butanediol), acetic acid, and carbon dioxide $(CO_{2}).$ Previous fermentation data of an algal biomass cultivated outdoors in a 50-L tubular photo-bioreactor showed good carbon (C) recovery in the fermentation balance, with a higher ratio to alcohols and, therefore, lower ratio to $CO_{2}$ in the C distribution of products than what would be expected from the embden-Myerhof-Parnas pathway. These findings led to a proposed concept for a $CO_{2}-ethanol$ conversion system (CDECS). The above data were evaluated in terms of hydrogen (H) recovery with the following results: C recovery at 105% was well balanced, although H recovery was as high as 139%, meaning an additional gain of H through fermentation. This finding was reproduced wholly in a set of experiments carried out in the same month of the following year, October, whereas another set of experiments was carried out in the following June provided ordinary fermentation results in terms of C and H recoveries with poor growth. Further analyses of these data revealed that butanediol is equal to ethanol as a product from a putative conversion system from $CO_{2}$ to the detected fermentation products, leading to the revision of the CDECS concept to a $CO_{2}-alcohol$ conversion system (CDACS). The relevance of the CDACS will be discussed in relation to the cultivation conditions employed by chance. |
| File Format | HTM / HTML |
| ISSN | 02732289 |
| Issue Number | 1-3 |
| Volume Number | 131 |
| e-ISSN | 15590291 |
| Journal | Applied Biochemistry and Biotechnology |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2006-03-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biochemistry Discipline Biotechnology Bioreactors Microbiology Carbon Dioxide Metabolism Chlamydomonas Ethanol Hydrogen Isolation & Purification Starch Animals Cell Culture Techniques Methods Fermentation Marine Biology Models, Biological Seawater Water Microbiology Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Molecular Biology Environmental Engineering Biochemistry Bioengineering Applied Microbiology and Biotechnology Biotechnology |
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