Physical properties of an extracellular polysaccharide produced by Bacillus sp. CP912

Abstract

Aims: In this study, some physical properties of Bacillus sp. exo-polysaccharide were investigated. Methods and Results: An extracellular polysaccharide was purified by sequential precipitations after homogenization of the diluted culture supernatant of Bacillus sp. CP912. Its physical properties were examined such as lipid emulsifying effect on several vegetable oils and flocculating activity against the activated carbon suspension. The melting point and endothermic calories of the polysaccharide were 128AE7°C and 50AE864 kCal mol )1 , respectively. Its pyrolysis temperature was 284AE58°C. The polysaccharide showed high lipid emulsifying activity on oil-water emulsion, against olive, peanut, sunflower and corn oils. It exhibited high flocculating activity as well against activated carbon. Conclusions: The present findings suggest that the extracellular polysaccharide produced by Bacillus sp. CP912 has a great industrial potential because of its high lipid emulsifying and flocculating activity. Significance and Impact of the study: These data represent a novel Bacillus sp. extracellular polysaccharide possessing high emulsifying and flocculating effects.

Functional Characteristics of an Exopolysaccharide from Antarctic Yeast StrainCryptococcus LaurentiiAL62

“…Glucomannan was used in the laboratory production of creamy products tested for stability at different temperatures with a view to their application in the cosmetics industry (8). Similar results were obtained by Yun and Park (15), who showed that an extracellular polysaccharide synthesised by Bacilus sp. СР912 had a high emulsifying activity for oil/water emulsions with different vegetable oils.…”

“…In most of the experiments, the separated oil phase percentage was zero, whereas the intact emulsion percentage was 100 or close to this value. the lipid emulsifying effect of the synthesised ePS alone and in combination with the food additives was evaluated through the centrifugation test at a relatively low speed of 2 000×g for 5 min as described by Yun and Park (15), as percentage of the emulsion layer and the entire emulsion system. Fig.…”

Synthesis and Characterization of an Exopolysaccharide by Antarctic Yeast Strain Cryptococcus laurentii AL100

“…Yun and Park used an extracellular polysaccharide synthesized by Bacillus sp. to obtain emulsions which had a stronger emulsifying effect than those made with xanthan [26]. Therefore, it was necessary to study the effect of some hydrocolloids on the emulsifying and stabilizing properties of the investigated biopolymer.…”

“…Polysaccharides synthesized by microorganisms have been extensively applied as emulsifiers, stabilizers, binding and gelling agents, coagulants, thickeners, and suspending agents in different areas [23][24][25][26]. Little information on polysaccharides produced by psychrophilic yeast and their physicochemical properties is available in the literature [20,24].…”

Short-term evaluation of the photosynthetic activity of an alkaliphilic microalgae consortium in a novel tubular closed photobioreactor

“…The estimated OPR m a x was 83 mg L − 1 h − 1 or 51.5 μmol O 2 g −1 biomass min −1 ; its performance was comparable with photosynthetic activities of other non-extremophile microalgae strains. For example, the OPR for Chlorella vulgaris was 78 μmol O 2 g −1 biomass min −1 (Yun and Park 2003;Wang et al 2014) and 46 μmol O 2 g −1 biomass min −1 for Scenedesmus almeriensis (Costache et al 2013). …”