Discovery of a Diatom That Oozes Oil

Vinayak, Vandana; Gordon, Richard; Gautam, Shristy; Rai, Anshuman

doi:10.1166/asl.2014.5591

Cited by 39 publications

(17 citation statements)

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“…Surface properties may prove important in secretion [ 138 ]. Very recently, Vinayak et al [ 109 ] reported that a small diatom strain (14–18 µm long and 6–7 µm width), Diadesmis confervaceae Kützing ( Figure 2 ), producing 14.6% lipid content, exudes lipid droplets into the culture medium. The mechanisms involved in oozing are not yet determined.…”

Section: Development Of Alternative Processes To Extract and Harvementioning

confidence: 99%

Diatom Milking: A Review and New Approaches

et al. 2015

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The rise of human populations and the growth of cities contribute to the depletion of natural resources, increase their cost, and create potential climatic changes. To overcome difficulties in supplying populations and reducing the resource cost, a search for alternative pharmaceutical, nanotechnology, and energy sources has begun. Among the alternative sources, microalgae are the most promising because they use carbon dioxide (CO2) to produce biomass and/or valuable compounds. Once produced, the biomass is ordinarily harvested and processed (downstream program). Drying, grinding, and extraction steps are destructive to the microalgal biomass that then needs to be renewed. The extraction and purification processes generate organic wastes and require substantial energy inputs. Altogether, it is urgent to develop alternative downstream processes. Among the possibilities, milking invokes the concept that the extraction should not kill the algal cells. Therefore, it does not require growing the algae anew. In this review, we discuss research on milking of diatoms. The main themes are (a) development of alternative methods to extract and harvest high added value compounds; (b) design of photobioreactors; (c) biodiversity and (d) stress physiology, illustrated with original results dealing with oleaginous diatoms.

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Section: Development Of Alternative Processes To Extract and Harvementioning

confidence: 99%

Diatom Milking: A Review and New Approaches

et al. 2015

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“…Interestingly, in this study tyrosine and tyrosine‐Zn II conjugates were incubated with diatom Nitzschia palea, which was cultured as per the standard lab procedure in a modified f/2 media . The cultured diatoms were sonicated and washed as described in published literature and used for the fabrication . The analysis of co‐incubated samples of Nitzschia palea with tyrosine and tyrosine‐Zn II conjugate revealed that deposition of tyrosine (Figure B&B’) and tyrosine‐ Zn II (Figure C&C’) over the surface ofdiatoms when analyzed under low vacuum SEM.…”

Section: Figurementioning

confidence: 78%

“…[42,56] The cultured diatoms were sonicated and washed as described in published literature and used for the fabrication. [57][58][59] The analysis of co-incubated samples of Nitzschia paleawith tyrosine and tyrosine-Zn II conjugate revealed that deposition of tyrosine ( Figure 3B&B') and tyrosine-Zn II (Figure 3C&C') over the surface ofdiatoms when analyzed under low vacuum SEM. The SEM images of treated diatoms can clearly be distinguished from the intact and untreated diatom ( Figure 3A&A').…”

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Biofabrication of Diatom Surface by Tyrosine‐Metal Complexes:Smart Microcontainers to Inhibit Bacterial Growth

et al. 2020

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This study explores the potential of a highly biocompatible golden brown algal cell, diatom, as a drug carrier to the bacterial cell. The strong interaction between diatom and bacteria that occur in the microenvironment, lead us to pave the way for exciting new directions where diatom can be used to address several bacterial infections. The surface of diatom frustules was modified with self‐assembled antibacterial aromatic amino acid conjugates, Tyr‐ZnII. Microscopy and spectroscopy observations confirmed the deposition of Tyr‐ZnII over diatom frustules. Diatoms can work as living microcontainers to store the toxic metal (drug) ions and therefore can be utilized as potential drug delivery agents to kill the clinically relevant bacteria. Due to antibacterial property of zinc ions, Tyr‐ZnII conjugates inhibits bacterial growth and diatom frustules were utilized as Tyr‐ZnII carrier for controlled release of zinc to the bacterial cell.

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“…9,10 In recent past we have identied a diatom strain Diadesmis confervacea which oozes high amount of oil via its naturally oozing properties on attaining maturity. 11 Though spontaneous oozing of oil greatly reduces effort to harvest oil using different techniques like pulse electric eld, ultrasonics and centrifugation but separation and collection of clean oil from PBRs is still a challenge. Harvesting oil from diatoms is a cumbersome process due to their rigid and tough silica cell walls.…”

Section: Introductionmentioning

confidence: 99%

TiO₂doped polydimethylsiloxane (PDMS) andLuffa cylindricabased photocatalytic nanosponge to absorb and desorb oil in diatom solar panels

et al. 2019

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Our previous report(s) demonstrated that piezoelectric disc fabricated diatom solar panels worked as micro resonating devices. Such devices have potential to harvest oils from living diatom cultures. However, it is observed that the collection and separation of oil from culture media using these devices are found to be difficult due to the presence of both living and dead diatom cells, which simultaneously get collected during this process. In this study we made a highly biocompatible nanosponge using TiO 2 nanoparticle doped polydimethylsiloxane (PDMS) and Luffa cylindrica. Such hybrid nanosponge selectively absorbs and desorbs oil on exposure to ultraviolet light. The fabricated PDMS-Luffa-TiO 2 nanosponge was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and atomic force microscopy to show the surface characteristics and affinity of nanoparticles to the membranous structure of PDMS-Luffa. A maximum 38% oil absorption was found in PDMS-Luffa-TiO 2 nanosponge which was almost double that of sponges made up of PDMS (19%), PDMS-Luffa (18%) and PDMS-TiO 2 coated (24%). Thus PDMS-Luffa-TiO 2 nanosponge serves as a selective and recyclable oil absorption membranous structure. Furthermore, this hybrid nanosponge exhibited excellent recyclability by repeated absorption-desorption processes on exposure to UV light.

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Discovery of a Diatom That Oozes Oil

Cited by 39 publications

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Diatom Milking: A Review and New Approaches

Diatom Milking: A Review and New Approaches

Biofabrication of Diatom Surface by Tyrosine‐Metal Complexes:Smart Microcontainers to Inhibit Bacterial Growth

TiO₂doped polydimethylsiloxane (PDMS) andLuffa cylindricabased photocatalytic nanosponge to absorb and desorb oil in diatom solar panels

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Discovery of a Diatom That Oozes Oil

Cited by 39 publications

References 0 publications

Diatom Milking: A Review and New Approaches

Diatom Milking: A Review and New Approaches

Biofabrication of Diatom Surface by Tyrosine‐Metal Complexes:Smart Microcontainers to Inhibit Bacterial Growth

TiO2doped polydimethylsiloxane (PDMS) andLuffa cylindricabased photocatalytic nanosponge to absorb and desorb oil in diatom solar panels

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TiO₂doped polydimethylsiloxane (PDMS) andLuffa cylindricabased photocatalytic nanosponge to absorb and desorb oil in diatom solar panels