[Objective] The aim was to investigate the effects of sound wave on propagation of Chlorella pyrenoidosa to explore the optimal frequency for Chlorella pyrenoidosa.[Method] In the research,Chlorella pyrenoidosa was cu...[Objective] The aim was to investigate the effects of sound wave on propagation of Chlorella pyrenoidosa to explore the optimal frequency for Chlorella pyrenoidosa.[Method] In the research,Chlorella pyrenoidosa was cultured for 7 d with sound waves at different frequencies and a control group was set to study effects of sound wave at different frequencies on growth of Chlorella pyrenoidosa.[Result] Growth of Chlorella pyrenoidosa was significantly improved by sound wave,especially for wave at 400 Hz.[Conclusion] Chlorella pyrenoidosa propagation would be promoted by sound wave at certain frequencies.展开更多
[Objective] This study aimed to gain better understanding of the effects of salt stress on photosynthesis of Spirulina platensis. [Method] A salt stress simulation experiment was carried out, in which Spirulina platen...[Objective] This study aimed to gain better understanding of the effects of salt stress on photosynthesis of Spirulina platensis. [Method] A salt stress simulation experiment was carried out, in which Spirulina platensis cells were incubated with different salt concentrations （0, 0.1, 0.3, 0.5, 0.8, and 1.0 mol/L of NaCI）. Subsequently, some photosynthesis-related parameters were determined after incubated at various NaCI concentrations for 24 h. [Result] Under our experimental conditions, chlorophyll, carotenoid, phycocyanin and allophycocyanin contents, and photosynthesis rate decreased with the increasing NaCI concentrations. Above the 0.5 mol/L Na- CI level, the detrimental effect of salt stress became more severe. [Conclusion] From the results obtained in this investigation, we can conclude that the decrease in chlorophyll, carotenoid, phycocyanin and allophycocyanin contents may be the most important reason causing the decline in photosynthsis rate which strongly affects the biomass yield of Spirulina platensis in outdoor cultivation展开更多
[Objective] This study aimed to seek the cultivation method for Spirulina with seawater. [Method] Spirulina was habituated culture progressively with prepared seawater acclimation solution. The morphological changes o...[Objective] This study aimed to seek the cultivation method for Spirulina with seawater. [Method] Spirulina was habituated culture progressively with prepared seawater acclimation solution. The morphological changes of Spirulina were observed and its biochemical indicators were measured. [Result] A new algae species was obtained, which had better stability and greater average length than Spirulina in fresh water. Compared with the Spirulina in fresh water, the new algae species showed no significant change in chlorophyll content, but a 62.8% increase in the concentration of phycocyanin. [Conclusion] The method could save resources and cost, which lays the foundation for large scale production and processing of Spirulina.展开更多
基金Supported by Zhejiang Major Science and Technology Program(2008C12056)Zhejiang Science Innovation Plan for Undergraduate(2011R415023)~~
文摘[Objective] The aim was to investigate the effects of sound wave on propagation of Chlorella pyrenoidosa to explore the optimal frequency for Chlorella pyrenoidosa.[Method] In the research,Chlorella pyrenoidosa was cultured for 7 d with sound waves at different frequencies and a control group was set to study effects of sound wave at different frequencies on growth of Chlorella pyrenoidosa.[Result] Growth of Chlorella pyrenoidosa was significantly improved by sound wave,especially for wave at 400 Hz.[Conclusion] Chlorella pyrenoidosa propagation would be promoted by sound wave at certain frequencies.
基金Supported by Project of Applied Basic Research from Sichuan Provincial Department of Science and Technology(2009JY0144)~~
文摘[Objective] This study aimed to gain better understanding of the effects of salt stress on photosynthesis of Spirulina platensis. [Method] A salt stress simulation experiment was carried out, in which Spirulina platensis cells were incubated with different salt concentrations （0, 0.1, 0.3, 0.5, 0.8, and 1.0 mol/L of NaCI）. Subsequently, some photosynthesis-related parameters were determined after incubated at various NaCI concentrations for 24 h. [Result] Under our experimental conditions, chlorophyll, carotenoid, phycocyanin and allophycocyanin contents, and photosynthesis rate decreased with the increasing NaCI concentrations. Above the 0.5 mol/L Na- CI level, the detrimental effect of salt stress became more severe. [Conclusion] From the results obtained in this investigation, we can conclude that the decrease in chlorophyll, carotenoid, phycocyanin and allophycocyanin contents may be the most important reason causing the decline in photosynthsis rate which strongly affects the biomass yield of Spirulina platensis in outdoor cultivation
文摘[Objective] This study aimed to seek the cultivation method for Spirulina with seawater. [Method] Spirulina was habituated culture progressively with prepared seawater acclimation solution. The morphological changes of Spirulina were observed and its biochemical indicators were measured. [Result] A new algae species was obtained, which had better stability and greater average length than Spirulina in fresh water. Compared with the Spirulina in fresh water, the new algae species showed no significant change in chlorophyll content, but a 62.8% increase in the concentration of phycocyanin. [Conclusion] The method could save resources and cost, which lays the foundation for large scale production and processing of Spirulina.
