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Effects of alginate gel on Rheological Properties of Hair-tail (Trichiurus lepturus) Surimi

Journal of Ocean University of China 2011年第2期10卷 191-196页

作者： XUE Yong LIU Xin ZHANG Lili LIN Dan XU Jiachao XUE Changhu College of Food Science and Engineering Ocean University of China Qingdao 266003 P.R. China

Effects of alginate gel at different concentrations on rheological properties of hair-tail (Trichiurus lepturus) surimi were investigated. alginate gel (1% - 3%) exhibited enhanced effects, especially when alginate gel concentration increased. The rheological properties of mixture samples were studied by the time sweep, frequency sweep and temperature sweep. The critical strain values of the mixture samples for the onset of non-linear viscoelasticity were about 5%. The storage modulus G' of the mixture samples increased with time for 4 h. The frequency sweep showed that G' was greater than G" for all the mixture gels with different alginate gel concentrations, and values of both n' and n" for all samples were low (gels. The values of storage modulus G' decreased during heating process and increased with decreasing temperature.

关键词： hair-tail surimi alginate gel rheological properties

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Survival of potential probiotic isolated from fermented tea leaf and encapsulated in multilayer beads stored in makiang(Cleistocalyx nervosum ***)juice

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Food Bioscience 2022年第6期50卷 389-395页

作者： Paramaporn Kerdsup Passarin Hattayapichat Juan L.Silva Sumate Tantratian Department of Food Technology Faculty of ScienceChulalongkorn UniversityBKK10330Thailand Program in Biotechnology Faculty of ScienceChulalongkorn UniversityBKK10330Thailand Department of Biotechnology and Agricultural Product Faculty of Agricultural Product Innovation and TechnologySrinakharinwirot UniversityNakhonnayok26120Thailand Department of Food Science Nutrition and Health PromotionMississippi State UniversityMS39762USA

Cleistocalyx nervosum *** juice or makiang juice has high content of acid and phenolic compounds which are detrimental to probiotic *** screening of potential probiotic with acid production and phenolic tolerant bacteria from fermented tea leaves revealed 5 isolates which were identified using 16s rRNA sequencing procedure and found similarity to the strain of Lactobacillus plantarum in GenBank database at 98–100%.The storage of 5 isolates and 6 probiotics in makiang juice for 24 h was indicated that *** MF105 and TISTR 2074 showed the least reduction of 30.10±1.25 and 61.41±2.37%,*** cultures were encapsulated in 2%alginate bead(Al),Al+single-layer of gelatin(ACG),and Al+double-layer of gelatin(ACGD).They were kept in makiang juice at 4°*** physico-chemical characteristics of beads in makiang juice illustrated that the accumulation of phenolic compounds was faster than the pH decreasing and caused initial reduction of bacterial *** ACGD beads absorbed slower and accumulated less amount of phenolic compounds than *** were the most effective in cell protection,the viability of encapsulated MF105 and TISTR2074 were prolonged to more than 7 and 4 days,*** adaptation in combination with encapsulation enhanced the survival of probiotic cell in sub-lethal stress *** had shown that increasing the coating layer provided a chance to improve lethality of probiotic bacteria.

关键词： Anthocyanin alginate gel Refrigeration temperature Adaptation

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Mercury removal and recovery by immobilized Bacillus megaterium MB1

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Frontiers of Chemical Science and Engineering 2012年第2期6卷 192-197页

作者： Meifang CHIEN Ryo NAKAHATA Tetsuya ONO Keisuke MIYAUCHI Ginro ENDO Faculty of Engineering Tohoku-Gakuin University Miyagi 985-8537 Japan

From several mercury removing microorgan- isms, we selected Bacillus megaterium MB 1, which is non- pathogenic, broad-spectrum mercury resistant, mercuric ion reducing, heat tolerant, and spore-forming, as a useful bacterium for bioremediation of mercury pollution. In this study, mercury removal performance of the immobilized B. megaterium MB1 was investigated to develop safe, efficient and stable catalytic bio-agent for mercury bioremediation. The results showed that the alginate gel immobilized B. megaterium MB 1 cells efficiently removed 80% of mercury from the solution containing 10mg/L mercuric chloride within 24 h. These cells still had high activity of mercury removal even after mercuric ion loading was repeated for nine times. The analysis of mercury contents of the alginate beads with and without immobilized B. megaterium MB1 suggested that a large portion of reduced metallic mercury was trapped in the gel beads. It was concluded that the alginate gel immobilized B. megaterium MB 1 cells have potential to remove and recover mercury from mercury-containing water.

关键词： mercury removal immobilized bacteria alginate gel bioremediation

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