Melanin mediated synthesis of gold nanoparticles by Yarrowia lipolytica

Apte, Mugdha; Girme, Gauri; Nair, Resmi V.; Bankar, Ashok; Kumar, Anuj; Zinjarde, Smita

doi:10.1016/j.matlet.2012.12.087

Cited by 43 publications

(21 citation statements)

References 29 publications

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“…A tropical marine isolate of Y. lipolytica has been reported to mediate the synthesis of gold nanoparticles (Agnihotri et al 2009; Apte et al 2013). Some strains of this yeast are also psychrotrophic in nature (Ross and Morris 1965; Margesin et al 2003) Psychrophiles and psychrotrophs are an important group of microorganisms that have several important applications (Feller and Gerday 2003; Bankar et al 2009; Sa´nchez et al 2009).…”

Section: Discussionmentioning

confidence: 99%

“…The melanin was extracted by following the standard procedure described earlier (Ito et al 2007 Apte et al 2013). Briefly, yeast cells were grown at 20°C for 72 h and the biomass was harvested by centrifugation (8000 × g , 15 min, 10°C).…”

Section: Methodsmentioning

confidence: 99%

“…The brown color is due to a pigment, melanin (Carreira et al 2001). It is a well-known fact that fungal melanins have strong anti-oxidant properties that protect them from radiation, high temperature, free radical attack and metals (Fogarty and Tobin 1996 Apte et al 2013). …”

Section: Introductionmentioning

confidence: 99%

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Psychrotrophic yeast Yarrowia lipolytica NCYC 789 mediates the synthesis of antimicrobial silver nanoparticles via cell-associated melanin

et al. 2013

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A psychrotrophic marine strain of the ascomycetous yeast Yarrowia lipolytica (NCYC 789) synthesized silver nanoparticles (AgNPs) in a cell-associated manner. These nanostructures were characterized by UV-Visible spectroscopy and scanning electron microscope-energy dispersive spectrometer (SEM-EDS) analysis. The brown pigment (melanin) involved in metal-interactions was obtained from the cells. This extracted pigment also mediated the synthesis of silver nanoparticles that were characterized by a variety of analytical techniques. The melanin-derived nanoparticles displayed antibiofilm activity. This paper thus reports the synthesis of AgNPs by the biotechnologically important yeast Y. lipolytica; proposes a possible mechanism involved in the synthetic process and describes the use of the bio-inspired nanoparticles as antibiofilm agents.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Psychrotrophic yeast Yarrowia lipolytica NCYC 789 mediates the synthesis of antimicrobial silver nanoparticles via cell-associated melanin

et al. 2013

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“…Using different biological substances such as algae [161], fungi [162,163], plant extracts [164][165][166][167][168], bacteria [169][170][171], yeast [172][173][174][175] and marine sponge [176] have been used to synthesise two metallic nanoparticles, which are silver (Ag) and/or gold (Au). Thakkar et al [177] established in their work the need for eco-friendly metallic nanoparticle synthesis, vis-à-vis energy saving, poisonous gas reduction and decline in the usage of toxic compounds.…”

Section: Methods Of Preparation Of Nanoparticles and Nanofluidsmentioning

confidence: 99%

The Viscosity of Nanofluids: A Review of the Theoretical, Empirical, and Numerical Models

Meyer

Adio

Sharifpur

et al. 2015

Heat Transfer Engineering

206

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The enhanced thermal characteristics of nanofluids have made it one of the fastest-growing research areas in the last decade. Numerous researches have shown the merits of nanofluids in heat transfer equipment. However, one of the problems is the increase in viscosity due to the suspension of nanoparticles. This viscosity increase is not desirable in the industry, especially when it involves flow, such as in heat exchanger or micro-channel applications INTRODUCTIONColloidal suspension dates back to Maxwell's study in 1873 [1]. Though the idea behind his study was vivid, the imposed problems were too enormous for profitable engineering solutions [2]. In 1995, Choi [3] came up with a pioneering idea based on Maxwell's study and suspended ultrafine particles (nanoparticles) in conventional heat transfer fluids. His invention has opened up a myriad of opportunities in research and development. Nanofluids descriptively are colloidal suspensions containing metallic (Ag, Au, Al, Cu, Ni, etc.), non-metallic (single-and multi-wall carbon nanotube (SWCNT and MWCNT), Si, Graphene, etc.), metallic oxide (Al2O3, CuO, NiO2,TiO2, etc.) and oxides of non-metals (SiO2, SiC, MgO, CaCO3, etc.) nanoparticles suspended in conventional heat transfer fluids such as water, engine oil, ethylene glycol, transformer oil, gear oil or mixture of two or more heat transfer fluids [2,3]. When compared with previous microparticle suspensions in conventional heat transfer fluids, it is a special type of fluid with numerous applications potentials because of its enhanced thermal conductivity, stability and homogeneity [3,4]. Microscale particles in suspensions lead to abrasion, clogging of flow paths, pressure drop and high pumping power requirements, therefore, its sustainability was impossible. Besides, nanofluids can reduce the pumping power in engineering equipment significantly and do not pose the problem of clogging and abrasion of equipment flow paths [5][6][7][8]. Therefore, the design and engineering of physical systems are now being tailored towards using nanofluid as working fluid.The impact of colloidal suspension cuts across the fields of science, biological science, medical, pharmaceutical and engineering. In the context of sustainable energy development and thermal management, nanofluids are becoming more and more significant as the need for efficient thermal management is of paramount importance. Moreover, the level of miniaturisation of devices today as technology advances is overwhelming. Devices such as microprocessors, microelectromechanical systems (MEMS), nanoelectromechanical systems (NEMS), microchannels and lab-on-chips come with high-density heat flux that needs quick heat removal for 3 efficient performance, stability and durability, which, from all indications, could be provided by nanofluids for now [9][10][11][12]. The following are also emerging areas of applications of nanoparticles and nanofluids: (i) they could be useful in medicine in the targeted treatment of malignant cells without damaging healthy tis...

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“…A nanotechnology study reported melanin as a mediator in the synthesis of gold nanoparticles (AuNP) by the yeast Yarrowia lipolytica [ 67 ]. Melanin is a pigment associated with the yeast.…”

Section: Melanin In Nanosize For the Skinmentioning

confidence: 99%