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Microalgae have already been investigated as a potential resource for biofuel in many reports. In this study, the effect of phosphorus concentration on lipid content was analyzed using the freshwater microalga Chlorella sp as a model. In addition, the carbohydrate and protein content were also analyzed in order to investigate the variations of biochemical… (More)
The growth characteristics of microalgae under different light conditions (continuous or intermittent) are essential information for photobioreactor design and operation. In this study, we constructed a thin-layer (10mm) flat plate photobioreactor device with a light/dark (L/D) alternation system to investigate the growth of Spirulina platensis under two… (More)
Nannochloropsis sp. was grown under mixotrophic conditions with 30 mM glucose as carbon source, reaching 507 mg dry wt l−1 after 8 d. This was 1.4-fold of that obtained under photoautotrophic conditions. Under mixotrophic and photoautotrophic cultivations, the net photosynthetic rate of Nannochloropsis sp. did not change but the respiratory rate increased… (More)
Nisin production in batch culture and fed-batch cultures (sucrose feeding rates were 6, 7, 8, and 10 g l(-1) h(-1), respectively) by Lactococcus lactis subsp. lactis ATCC 11454 was investigated. Nisin production showed primary metabolite kinetics, and could be improved apparently by altering the feeding strategy. The nisin titer reached its maximum, 4,185… (More)
The specific growth rate, cell final yields and extracellar carbonic anhydrase activity of the red tide alga Skeletonema costatum increased with increasing concentrations of Zn2+ from 0 to 12 pM, but decreased when Zn2+ was over 24 pM. However, cells grown under high concentrations of Zn2+ had higher activities of intracellular carbonic anhydrase than those… (More)
Nisin production was improved under nutritional limitation in fed-batch culture of Lactococcus lactis. Nisin titre reached 3887 IU ml−1 by a slow feeding of sucrose and 4131 IU ml−1 by slow feeding of nitrogen source, which were, respectively, 64% and 74% above the values in batch culture.
Nisin production by Lactococcus lactis subsp. lactisin fed-batch culture was doubled by using a pH feed-back controlled method. Sucrose concentration was controlled at 10 g l−1 giving 5010 IU nisin ml−1 compared to 2660 IU nisin ml−1 in batch culture.
—We demonstrate an error-free four-user 10-Gb/s/user optical code-division multiple-access network testbed employing the spectral phase encoded time spreading technique and nonlinear thresholding. The experiments successfully overcome multiuser interference , resulting in error-free operation.
−11), significant per-user power penalty reduction, and the elimination of a bit-error-rate noise floor. The testbed also applies bandwidth suppression within the encoders and decoders, yielding a 52% increase in spectral efficiency.