Characterization of yeast cells as a microencapsulation wall material by Fourier-transform infrared spectroscopy

Shi, Gaoquan; Rao, Liqun; Xie, Qingji; Li, Jun; Li, Benxiang; Xiong, Xingyao

doi:10.1016/j.vibspec.2010.04.007

Cited by 36 publications

(19 citation statements)

References 37 publications

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“…Both hydrophobic and hydrophilic food components and pharmaceutical substances can be encapsulated in yeast cells. The whole cells or cell walls of Saccharomyces cerevisiae (baker's and brewer's yeast) were mainly used in yeast encapsulation . The present process generally includes the mixing of the yeast cells (alive, plasmolysed or non‐plasmolysed, wet or dried) with the active agent in water or water/organic solvent solution, followed by stirring for several hours at a controlled temperature .…”

Section: Introductionmentioning

confidence: 99%

“…The whole cells or cell walls of Saccharomyces cerevisiae (baker's and brewer's yeast) were mainly used in yeast encapsulation. 11,12,14 The present process generally includes the mixing of the yeast cells (alive, plasmolysed or non-plasmolysed, wet or dried) with the active agent in water or water/organic solvent solution, followed by stirring for several hours at a controlled temperature. 12 This technology has been applied for the encapsulation of various compounds, such as curcumin, chlorogenic acid, fish oil, resveratrol, enzymes and limonene.…”

Section: Introductionmentioning

confidence: 99%

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Characterization and oxidative stability of purslane seed oil microencapsulated in yeast cells biocapsules

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization and oxidative stability of purslane seed oil microencapsulated in yeast cells biocapsules

et al. 2017

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“…The peaks 1026-1029 cm -1 were attributed to (C-O-C) -polysaccharides or (C-O), which are not found in the PF residue spectra (Labuto et al, 2015). For the FR, it is possible to observe the band at 1723 cm -1 , indicating the presence of lipids and fatty acids (C=O) -ester (Shi et al, 2010). According to Shi et al (2010) this is due to the depletion of the highly dense structure of the cell walls.…”

Section: Characterization Of Yb After Fenton Degradationmentioning

confidence: 93%

“…For the FR, it is possible to observe the band at 1723 cm -1 , indicating the presence of lipids and fatty acids (C=O) -ester (Shi et al, 2010). According to Shi et al (2010) this is due to the depletion of the highly dense structure of the cell walls. The most noticeable feature is the strong intensity of the band at 1026 cm -1 , assignable to (C-O-C) -polysaccharides or (C-O), indicating similarity with YB.…”

Section: Characterization Of Yb After Fenton Degradationmentioning

confidence: 98%

Efficient degradation of solid yeast biomass from ethanol industry by Fenton and UV-Fenton processes applying multivariate analysis

Labuto

Silva

et al. 2017

Rev. ambiente água

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Organic agro-industrial residues have been successfully used as biosorbents and promoting new uses from agricultural wastes benefits the economy. However, the allocation of a solid waste biosorbent after the sorption of contaminants has limited their effective application on a large scale as an alternative treatment of water and wastewaters. One solution could be degradation to convert the biosorbent material and adsorbed organic contaminants into environmental friendly compounds suitable for discharge. This study used an experimental design to evaluate the Fenton degradation of yeast biomass (YB) from the alcohol industry as a potential biosorbent. The efficiency of degradation was monitored according to the degraded mass (DM) and total organic carbon (TOC) remaining in the solution. The ANOVA showed an error of 9.7% for the effects and the media of interaction for the employed model for DM. Conducting the experiments with the best-predicted conditions (60 min, 25 g of YB, pH 3, 8,000 mg L-1 H2O2 and 40 mg L-1 Fe2+) with 30 W UV irradiation resulted in a YB reduction of 72 ± 2% with a TOC of 30 ± 2%. This suggests that an advanced oxidative process is an alternative for degradation of a biosorbent after sorption.

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“…All the materials for yeast culture were purchased from Dingguo Biochemical Ltd. (Beijing, China). The yeast strain used in this study was S. cerevisiae (ATCC code 9804) and incubated with a procedure reported previously (Shi et al 2010). Chitosan (degree of deacetylation 90%, MW 15 kD) was obtained from Kayon Biological Technol.…”

Section: Methodsmentioning

confidence: 99%

Chemical treatment and chitosan coating of yeast cells to improve the encapsulation and controlled release of bovine serum albumin

Shi

Liu

et al. 2016

Artificial Cells, Nanomedicine, and Biotechnology

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We investigate the encapsulation of bovine serum albumin (BSA) in chemical-treated and chitosan-coated yeast cells, Saccharomyces cerevisiae (S. cerevisiae), for the controlled release of BSA. The chemical treatment can sufficiently enlarge the small-sized cell-wall cavities and/or break the integrity for the entrance of BSA to the interior of yeast cells, and the additional chitosan coating can well prevent the rapid release of encapsulated BSA from the yeast-derived microcapsules. The sodium hydroxide pretreated S. cerevisiae gives a maximum encapsulation yield of (10.1 ± 0.2)% for BSA. An additional coating of S. cerevisiae with chitosan can reduce the initial burst release of BSA and extend the release period from 24 h in the chitosan-free case to 48 h in phosphate buffer at pH 7.4. The prepared microcapsules can well keep the shapes and sizes of yeast cells and thus show uniform sizes of 3.85 ± 0.81 μm. The encapsulated BSA well retains its pristine ultraviolet spectroscopic and chromatographic behaviors. The present microencapsulation protocol has the advantages of convenient and mild operation, high encapsulation efficiency, and organic solvent-free nature, which is of reference value for establishing high-performance controllable biomacromolecule-delivery systems.

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Characterization of yeast cells as a microencapsulation wall material by Fourier-transform infrared spectroscopy

Cited by 36 publications

References 37 publications

Characterization and oxidative stability of purslane seed oil microencapsulated in yeast cells biocapsules

Characterization and oxidative stability of purslane seed oil microencapsulated in yeast cells biocapsules

Efficient degradation of solid yeast biomass from ethanol industry by Fenton and UV-Fenton processes applying multivariate analysis

Chemical treatment and chitosan coating of yeast cells to improve the encapsulation and controlled release of bovine serum albumin

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