Mild pressure induces rapid accumulation of neutral lipid (triacylglycerol) in Chlorella spp.

Praveenkumar, Ramasamy; Kim, Bohwa; Lee, Jiye; Vijayan, Durairaj; Lee, Kyubock; Nam, Bora; Jeon, Sang Goo; Kim, Dong‐Myung; Oh, You-Kwan

doi:10.1016/j.biortech.2016.09.025

Cited by 20 publications

(4 citation statements)

References 24 publications

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“…They observed a slight increase of Chlorella vulgaris under TiO 2 /UV-A conditions, though a high dosage of TiO 2 (0.1 g/L) and 2-day incubation were required. Praveenkumar et al [46] reported a new pressure-based stress method for induction of neutral lipid (e.g. TAG) of Chlorella spp.…”

Section: Established Chain Reaction Pathways Coupling the Reaction En...mentioning

confidence: 99%

Mechanisms of strengthening energy and mass transfer in microbial conversion of flue-gas-derived CO2 to biodiesel and biogas fuels

Cheng

Cen

2022

Carb Neutrality

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The goals of national energy security and sustainable development necessitate the role of renewable energy, of which biomass energy is an essential choice for realizing the strategic energy diversification and building a low-carbon energy system. Microbial conversion of flue-gas-derived CO2 for producing biodiesel and biogas has been considered a significant technology in new energy development. Microalgae carbon sequestration is a hot research direction for researchers. However, three fundamental problems relating to energy/mass transfer and conversion remain as follows: (1) contradictory relationship between high resistance of cell membrane micropores and high flux of flue-gas-derived CO2 limits mass transfer rate of CO2 molecules across cell membrane; (2) low biocatalytic activity of intracellular enzymes with high-concentration CO2 results in difficulties in directional carbon/hydrogen conversion; (3) competition between multiple intracellular reaction pathways and high energy barriers of target products hinder the desirable cascade energy transfer. Therefore, key scientific issues of microbial energy conversion lie in the understanding on directional carbon/hydrogen conversion and desirable cascade energy transfer. Multiple researches have established a theoretical foundation of microbial energy conversion which strengthens energy/mass transfer in microbial cells. The innovative results in previous studies have been obtained as follows: (1) Reveal mass transfer mechanism of vortex flow across cell membrane micropores. (2) Propose a strategy that directionally regulates enzyme activity. (3) Establish chain reaction pathways coupled with step changes.

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Section: Established Chain Reaction Pathways Coupling the Reaction En...mentioning

confidence: 99%

Mechanisms of strengthening energy and mass transfer in microbial conversion of flue-gas-derived CO2 to biodiesel and biogas fuels

Cheng

Cen

2022

Carb Neutrality

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“…Although Chlorella sp. KR-1 has been extensively studied due to its high biomass/lipid productivity and flue-gas tolerance [2,5,6,23], its lowered metabolic activities, especially at 40 • C, should be noticed. Interestingly, Chlorella sp.…”

Section: Outdoor Flue-gas Cultivation and High-temperature Tolerance mentioning

confidence: 99%

“…Meanwhile, Chlorella sp. KR-1, which has been extensively studied for its high lipid productivity and flue-gas tolerance, was maintained at the Korea Institute of Energy Research (KIER; Daejeon, Korea) [2,5,6,23,26,27]. The modified N8 medium used in this study was prepared and filter-sterilized through a 0.2 µm membrane, and its pH was adjusted to 6.5 [16].…”

Section: Microalgal Strains and Culture Mediummentioning

confidence: 99%

“…Microalgae have attracted much global attention for their potential as biodiesel feedstock [1,2]. This interest reflects not only microalgae's higher photosynthetic efficiency and lipid yield compared with conventional oil crops but also their ability to mitigate atmospheric CO 2 and to grow in non-arable land and a variety of wastewaters [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Prospecting for Oleaginous and Robust Chlorella spp. for Coal-Fired Flue-Gas-Mediated Biodiesel Production

et al. 2018

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Prospecting for robust and high-productivity strains is a strategically important step in the microalgal biodiesel process. In this study, 30 local strains of Chlorella were evaluated in photobioreactors for biodiesel production using coal-fired flue-gas. Three strains (M082, M134, and KR-1) were sequentially selected based on cell growth, lipid content, and fatty acid composition under autotrophic and mixotrophic conditions. Under autotrophic conditions, M082 and M134 showed comparable lipid contents (ca. 230 mg FAME [fatty acid methyl esters derived from microalgal lipids]/g cell) and productivities (ca. 40 mg FAME/L·d) versus a reference strain (KR-1) outdoors with actual flue-gas (CO2, 13%). Interestingly, under mixotrophic conditions, M082 demonstrated, along with maximal lipid content (397 mg FAME/g cell), good tolerance to high temperature (40 °C). Furthermore, the fatty acid methyl esters met important international standards under all of the tested culture conditions. Thus, it was concluded that M082 can be a feedstock of choice for coal-fired, flue-gas-mediated biodiesel production.

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Stress Response of Microalgae and Its Manipulation for Development of Robust Strains

Wan

Chen

Zhao

et al. 2019

Microalgae Biotechnology for Development of Biofuel and Wastewater Treatment

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Mild pressure induces rapid accumulation of neutral lipid (triacylglycerol) in Chlorella spp.

Cited by 20 publications

References 24 publications

Mechanisms of strengthening energy and mass transfer in microbial conversion of flue-gas-derived CO2 to biodiesel and biogas fuels

Mechanisms of strengthening energy and mass transfer in microbial conversion of flue-gas-derived CO2 to biodiesel and biogas fuels

Prospecting for Oleaginous and Robust Chlorella spp. for Coal-Fired Flue-Gas-Mediated Biodiesel Production

Stress Response of Microalgae and Its Manipulation for Development of Robust Strains

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