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Arabitol

About: Arabitol is a research topic. Over the lifetime, 388 publications have been published within this topic receiving 8398 citations. The topic is also known as: D-(+)-Arabitol & D-arabitol.


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Journal ArticleDOI
TL;DR: The induction of thermotolerance in the biocontrol agent Candida sake CPA‐1 cells by mild heat treatments to enhanced survival of formulations using spray‐drying was examined.
Abstract: Aims: The objective of this study was to examine the induction of thermotolerance in the biocontrol agent Candida sake CPA-1 cells by mild heat treatments to enhanced survival of formulations using spray-drying. The possible role of heat-shock proteins (HSPs) biosynthesis in induced thermotolerance and the role of sugars and sugar alcohols were also determined. Methods and Results: Studies were conducted on C. sake cells grown in molasses medium and exposed to mild temperatures of 30 and 33°C during mid- (16 h), late-exponential (24 h), early- (30 h) and mid-stationary (36 h) growth phases. The effect on viability was determined both before and after spray-drying. Cycloheximide and chloramphenicol were used to examine the role of HSPs and HPLC was used to analyse the accumulation of sugar and sugar alcohols. The results indicate that both temperatures induced thermotolerance in cells of C. sake. Mild heat-adapted cells at 33°C in the early- or mid-stationary phases had survival values after spray-drying significantly higher (P ≤ 0·05) than nonadapted cells. However, viabilities were not high enough to be considered for commercial use with values up to 17%. HSPs were not implicated in thermotolerance acquired by mild heat-adapted cells as similar viabilities were obtained in the presence of protein inhibitors. Little change was observed in sugar and sugar alcohols with an increase in glucose and arabitol in some treatments. Conclusions: This study suggests that it is possible to induce thermotolerance in biocontrol yeasts such as C. sake. However, this does not improve survival of cells exposed to spray-drying sufficiently to consider this a suitable formulation method for this biocontrol agent. HSPs, sugars and sugar polyols were not directly responsible for induced thermotolerance in yeast cells. Significance and Impact of the Study: This type of information can be effectively applied to improve the viability of cells in the process of formulation.

47 citations

Journal ArticleDOI
TL;DR: Candida peltata NRRL Y-6888 to ferment xylose to xylitol was evaluated under different fermentation conditions such as pH, temperature, aeration, substrate concentration and in the presence of glucose, arabinose, ethanol, methanol and organic acids.
Abstract: NRRL Y-6888 to ferment xylose to xylitol was evaluated under different fermentation conditions such as pH, temperature, aeration, substrate concentration and in the presence of glucose, arabinose, ethanol, methanol and organic acids. Maximum xylitol yield of 0.56 g g−1 xylose was obtained when the yeast was cultivated at pH 6.0, 28°C and 200 rpm on 50 g L−1 xylose. The yeast produced ethanol (0.41 g g−1 in 40 h) from glucose (50 g L−1) and arabitol (0.55 g g−1 in 87 h) from arabinose (50 g L−1). It preferentially utilized glucose > xylose > arabinose from mixed substrates. Glucose (10 g L−1), ethanol (7.5 g L−1) and acetate (5 g L−1) inhibited xylitol production by 61, 84 and 68%, respectively. Arabinose (10 g L−1) had no inhibitory effect on xylitol production.

47 citations

Journal ArticleDOI
TL;DR: Polyols in the mycelia (or vegetative cells) of 27 species, including representatives from each of the major classes of fungi, were analyzed using thin-layer chromatography, paper electrophoresis, and gas chromatography to confirm that Oomycetes lack sugar alcohols.

47 citations

Journal ArticleDOI
TL;DR: In this article, the authors used NMR spectroscopy to study the patterns of accumulation of osmotically active internal solutes in five different fungi (Penicillium janczewskii, Eurotium chevalieri, Xeromyces bisporus and Wallemia sebi), and one non-xerophilic fungal species (P. digitatum).
Abstract: Summary: Natural-abundance 13C nuclear magnetic resonance spectroscopy was used to study the patterns of accumulation of osmotically active internal solutes in five different fungi. Four xerophilic fungi (Penicillium janczewskii, Eurotium chevalieri, Xeromyces bisporus and Wallemia sebi), and one non-xerophilic fungal species (P. digitatum) were grown at three different water activities (a w) on media containing sorbitol, glucose/fructose or NaCl as the controlling solute. Under all conditions studied, the major internal solutes detected in aqueous ethanol extracts of these fungi were simple polyhydric alcohols: glycerol, erythritol, arabitol and mannitol. The most important osmoregulatory solute accumulated by all species was glycerol. On the sorbitol and the glucose/fructose media, all five fungi were able to accumulate glycerol. However, when NaCl was used to control a w, only one species, W. sebi, was able to accumulate glycerol below 0.92 a w. Significant quantities of the controlling solutes were also present in the extracts. When intact mycelia of P. janczewskii were examined by NMR, resonances of all the major internal solutes were clearly discernible, although they were not as well resolved as those from the fungal extracts. Relaxation measurements showed that the solutes were relatively mobile inside the cells.

46 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20237
202223
202113
20207
201911
201813