Phycology

Borowitzka, Michael A.

doi:10.1002/9780470015902.a0000334.pub3

Cited by 7 publications

(5 citation statements)

References 17 publications

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“…We have studied the centripetal focusing of gyrotactic microalgae around the axis of a ro- More in general, understanding the interplay between swimming and fluid transport is crucial to rationalize phytoplankton ecology [2,3] and also for industrial applications. For example, many (motile) microalgae are cultured in photobioreactors to be commercially used as nutrients, for biofuels production or for cosmetic industry [40]. As bioreactors work both in laminar and turbulent fluid motion [41], a better understanding the interaction between fluid motion and swimming is fundamental to optimize efficiency.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Centripetal focusing of gyrotactic phytoplankton

Cencini

Franchino

Santamaria³

et al. 2016

Journal of Theoretical Biology

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A suspension of gyrotactic microalgae Chlamydomonas augustae swimming in a cylindrical water vessel in solid-body rotation is studied. Our experiments show that swimming algae form an aggregate around the axis of rotation, whose intensity increases with the rotation speed. We explain this phenomenon by the centripetal orientation of the swimming direction towards the axis of rotation. This centripetal focusing is contrasted by diffusive fluxes due to stochastic reorientation of the cells. The competition of the two effects lead to a stationary distribution, which we analytically derive from a refined mathematical model of gyrotactic swimmers. The temporal evolution of the cell distribution, obtained via numerical simulations of the stochastic model, is in quantitative agreement with the experimental measurements in the range of parameters explored.

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Section: Conclusion and Discussionmentioning

confidence: 99%

Centripetal focusing of gyrotactic phytoplankton

Cencini

Franchino

Santamaria³

et al. 2016

Journal of Theoretical Biology

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“…1d). The proportional increase in intracellular glycerol in response to salinity has been widely reported in Dunaliella and assumed to be a major mechanism for maintaining intracellular osmotic pressure to counter increased extracellular osmolality (Ben-Amotz & Avron, 1981, 1990Borowitzka & Borowitzka, 1988).…”

Section: Discussionmentioning

confidence: 99%

Intracellular glycerol accumulation in light limitedDunaliella tertiolectaculture is determined by partitioning of glycerol across the cell membrane

Low

Chow

et al. 2014

FEMS Microbiol Lett

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Dunaliella accumulates intracellular glycerol to counterbalance the extracellular salinity. In N-limited chemostat cultures of D. tertiolecta, total glycerol production (sum of intracellular and extracellular) and intracellular glycerol content were proportional to the salinity of the culture medium. In the light-limited D. tertiolecta culture, total glycerol output (sum of intracellular and extracellular) was relatively constant at different salinities (0.5 and 2.0 M), while the intracellular glycerol content was proportional to the culture medium salinity, that is, the cells released less glycerol into the culture medium, rather than de novo synthesis of glycerol at high culture medium salinity. The study implies different regulatory mechanisms in the accumulation of intracellular glycerol in N-limited and light-limited D. tertiolecta in response to salinity.

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“…Algae are capable of surviving in a variety of aquatic and moist environments, including marine and freshwater habitats, as well as in soils, salt lakes, and hot springs [5]. Several microalgae species have been identified as potential candidates for large-scale cultivation, but there is still a lack of conclusive information obtained through commercial trials to assess the suitability of most of these species.…”

Section: Introductionmentioning

confidence: 99%

Review on Smart Algae Bio Panel and its Growth Forecasting Using Machine Learning

Husainy¹,

Chougule²,

Jadhav³

et al. 2022

ARME

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The world is facing major issues associated with the reliance on fossil fuels for energy supply, including rising prices, greenhouse gas emissions, and the risk of depletion. Various technologies have been developed for fixing carbon dioxide, which contributes to global warming. Biological fixation using photosynthetic microalgae cultured on a large scale is a promising method. In this method, carbon should be either wholly stored in the algal biomass or substituted for fossil fuel. Algal biomass can be degraded to carbon dioxide or methane, which is released to the atmosphere. The use of microalgae as a sustainable source of renewable energy and biofuels has garnered significant attention in recent years. One of the advantages of microalgae is their ability to accumulate high levels of lipids, making them a promising feedstock for biofuel production. Moreover, microalgae can be cultivated on non-arable land and can be grown using alternative water sources such as seawater, which further enhances their potential as a sustainable and environmentally friendly energy source. A photo bioreactor (PBR) is essential equipment for microalgal photosynthetic fixation of CO2. A PBR system implemented in a smart bio panel utilizes algae to trap sunlight energy and convert it into electricity, while also generating biomass as a by-product and acting as a CO2 scrubber. To make the system smart, machine learning algorithms were implemented to monitor and predict the growth rate of the algae Support Vector Machines (SVM) were used to predict the growth behavior of the microalgae, and the results showed that the SVM-based model can predict the growth rate of microalgae with a correlation coefficient of 90 percent. Microalgae biomass production heavily relies on photosynthesis, which only utilizes a small portion of the solar energy, mainly in the blue and red wavelengths. However, in traditional microalgae cultivation, the unused portion of the solar spectrum heats up the algae ponds and causes water evaporation, leading to increased salinity, especially in hot and semi-arid locations.

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Phycology

Cited by 7 publications

References 17 publications

Centripetal focusing of gyrotactic phytoplankton

Centripetal focusing of gyrotactic phytoplankton

Intracellular glycerol accumulation in light limitedDunaliella tertiolectaculture is determined by partitioning of glycerol across the cell membrane

Review on Smart Algae Bio Panel and its Growth Forecasting Using Machine Learning

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