Effect of oxygen on the growth (yield) of Chlorella vulgaris期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

Effect of oxygen on the growth (yield) of Chlorella vulgaris

Authors:	Takahira Ogawa Takao Fujii Shuichi Aiba

Institution:	(1) Department of Fermentation Technology, Faculty of Engineering, Osaka University, Yamada-kami, Suita-shi, Osaka, Japan

Abstract:	The growth yield of Chlorella vulgaris, Y _kJ defined as g cells harvested per kJ of light energy absorbed by the cells, was assessed in a turbidostat culture by varying CO₂ and O₂ partial pressures ( $p_{{\text{CO}}_{\text{2}} }$ and $p_{{\text{O}}_{\text{2}} }$ ). The value of Y _kJ ranged from 3.1×10^-3 to 5.0×10^-3 g cells/kJ under light-limited conditions $p_{{\text{CO}}_{\text{2}} }$ = 1.02.4%, $p_{{\text{O}}_{\text{2}} }$ = 065%; total pressure of gas (composed of CO₂, O₂ and N₂)=1 atm]. In the light-limited environment, the algal specific growth rate deteriorated appreciably with the increase of $p_{{\text{O}}_{\text{2}} }$ . The deterioration accounts for the above range of Y _kJ observed. The growth inhibition due to oxygen that was defined by subtracting from 1.0 the ratio of at given values of $p_{{\text{O}}_{\text{2}} }$ to that at $p_{{\text{O}}_{\text{2}} }$ = 0% extended from 0.07–0.30 (7–30%). However, glycolate could not be detected in the turbidostat culture. Isotopic experiments on the specific rate of ¹⁴CO₂ uptake also revealed that the inhibition due to oxygen was from 22–38% when $p_{{\text{O}}_{\text{2}} }$ was varied from 0 to nearly 100%. These effects of oxygen were discussed, referring to the activity of ribulose-1,5-bisphosphate carboxylase that is inhibited competitively by oxygen.Non-Standard Abbreviations INH isonicotinic acid hydrazide - PPO 2,5-diphenyloxazole - DCMU 3-(-3,4-dichlorophenyl)-1,1-dimetylurea - CA carbonic anhydrase - RuP₂ ribulose-1,5-bisphosphate

Keywords:	Chlorella vulgaris Turbidostat culture Growth yield (Y _kJ) Oxygen inhibition in Chlorella growth RuP₂ carboxylase/oxygenase Carbonic anhydrase
本文献已被 SpringerLink 等数据库收录！

设为首页 | 免责声明 | 关于勤云 | 加入收藏