Aqueous Gel Formation from Sodium Salts of Cellobiose Lipids

Imura, Tomohiro; Yamamoto, Shuhei; Yamashita, Chikako; Taira, Toshiaki; Minamikawa, Hiroyuki; Morita, Tomotake; Kitamoto, Daï

doi:10.5650/jos.ess14104

Cited by 18 publications

(15 citation statements)

References 19 publications

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“…The lowest surface tension value obtained for the crude biosurfactant produced by W. anomalus CCMA 0358 was similar to those reported for other biosurfactants produced by yeasts (between 30.3 and 35.9 mN/m) [5,6,8,19,20,27]. However, the cmc herein obtained was higher when compared with some values reported by other authors (0.02-0.366 mg/mL) [6,8,10,19,23], which may be due to differences in the purification processes.…”

Section: Critical Micelle Concentration (Cmc)supporting

confidence: 79%

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New glycolipid biosurfactants produced by the yeast strain Wickerhamomyces anomalus CCMA 0358

Souza

Gudiña

Azevedo

et al. 2017

Colloids and Surfaces B: Biointerfaces

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In this work, biosurfactant production by several yeast strains was evaluated using different culture media. The best results were obtained with the strain Wickerhamomyces anomalus CCMA 0358 growing in a culture medium containing glucose (1g/L) and olive oil (20g/L) as carbon sources. This strain produced 2.6g of biosurfactant per liter after 24h of growth. The crude biosurfactant reduced the surface tension of water to values around 31mN/m, and its critical micelle concentration was 0.9mg/mL. This biosurfactant was characterized through mass spectrometry (MS), and nuclear magnetic resonance (NMR) as a mixture of two different glycolipids, comprising a sugar moiety linked to one or three molecules of oleic acid. To the best of our knowledge, these biosurfactants are structurally different from those previously reported. Furthermore, the crude biosurfactant exhibited antimicrobial activity against several microorganisms, including the pathogens Candida albicans, Escherichia coli, Staphylococcus epidermidis and Streptococcus agalactiae, which opens the possibility for its use in several biomedical applications.

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Section: Critical Micelle Concentration (Cmc)supporting

confidence: 79%

“…Y. lipolytica and C. humicola strains have been previously reported as biosurfactant producers [4,27]. Regarding W. anomalus (formerly known as Pichia anomala), only the strain PY1 has been reported to produce biosurfactants [21].…”

Section: Screening Of Biosurfactant-producing Yeast Strainsmentioning

confidence: 99%

New glycolipid biosurfactants produced by the yeast strain Wickerhamomyces anomalus CCMA 0358

Souza

Gudiña

Azevedo

et al. 2017

Colloids and Surfaces B: Biointerfaces

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“…To the best of our knowledge, in the broader field of glycolipid biosurfactants, only cellobioselipids and non-acidic symmetrical sophorolipids were shown to have gelling properties. [39][40][41] If this compound could be expected to form a SAFiN hydrogel, which we show as the first result of this work, we also report an unprecedented role of the kinetics of pH variation to control the hydrogel homogeneity and to improve its mechanical properties. In contrast to the abundant literature on pH-driven LMWG hydrogels (often composed of Fmoc-derivatives), we show that both heterogeneous (through external HCl addition) and homogeneous (through internal GDL hydrolysis) acidification can induce the formation of homogeneous SAFiN hydrogels with comparable mechanical properties.…”

Section: Introductionsupporting

confidence: 61%

pH-Controlled Self-Assembled Fibrillar Network Hydrogels: Evidence of Kinetic Control of the Mechanical Properties

et al. 2019

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Control of the nucleation and growth process in self-assembled fibrillary networks (SAFiN) with the goal of preparing physical hydrogels from low molecular weight gelators (LMWG) is well-established but mainly for temperature-driven hydrogelators. In the presence of other stimuli, like pH, the fundamental knowledge behind gel formation still lacks. In particular, whether pH affects nucleation and growth of the fibers and how this aspect could be related to the stability of the hydrogel is still matter of debate. In this work, we establish a precise relationship between the pH change rate during the micelle-to-fiber transition, observed for stearic acid sophorolipids-a bolaform microbial glycolipidand supersaturation. We show that tough SAFiN hydrogels are obtained for slow pH change rates, when supersaturation is low, while weak gels, or even phase separation through powder precipitation, are obtained upon fast pH change. Interestingly, these results are independent of the pH change method, may it be through manual variation using HCl, or by using the internal hydrolysis of glucono-δ-lactone (GDL), the latter being currently acknowledged as a unique way to systematically obtain tough gel through internal pH change.

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“…The CL produced by Cryptococcus humicola are additives for the formulation of colloids applied in the food and cosmetics industries [ 119 ]. Sodium salts improves the aqueous solubility of CLs and favours the formation of gels in alcoholic solution (ethanol or 1,3-butanediol) [ 119 , 120 ]. CL from C. humicola , when added to poly (lactic acid) films, modifies the surface properties increasing, for example, its wettability [ 121 ].…”

Section: Structural Classes Properties and Applicationsmentioning

confidence: 99%

Fungal biosurfactants, from nature to biotechnological product: bioprospection, production and potential applications

Silva

Banat

Giachini

et al. 2021

Bioprocess Biosyst Eng

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Biosurfactants are in demand by the global market as natural commodities that can be added to commercial products or use in environmental applications. These biomolecules reduce the surface/interfacial tension between fluid phases and exhibit superior stability to chemical surfactants under different physico-chemical conditions. Biotechnological production of biosurfactants is still emerging. Fungi are promising producers of these molecules with unique chemical structures, such as sophorolipids, mannosylerythritol lipids, cellobiose lipids, xylolipids, polyol lipids and hydrophobins. In this review, we aimed to contextualize concepts related to fungal biosurfactant production and its application in industry and the environment. Concepts related to the thermodynamic and physico-chemical properties of biosurfactants are presented, which allows detailed analysis of their structural and application. Promising niches for isolating biosurfactant-producing fungi are presented, as well as screening methodologies are discussed. Finally, strategies related to process parameters and variables, simultaneous production, process optimization through statistical and genetic tools, downstream processing and some aspects of commercial products formulations are presented.

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Aqueous Gel Formation from Sodium Salts of Cellobiose Lipids

Cited by 18 publications

References 19 publications

New glycolipid biosurfactants produced by the yeast strain Wickerhamomyces anomalus CCMA 0358

New glycolipid biosurfactants produced by the yeast strain Wickerhamomyces anomalus CCMA 0358

pH-Controlled Self-Assembled Fibrillar Network Hydrogels: Evidence of Kinetic Control of the Mechanical Properties

Fungal biosurfactants, from nature to biotechnological product: bioprospection, production and potential applications

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