共查询到19条相似文献,搜索用时 617 毫秒
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采用二-(2-乙基已基)琥珀酸酯磺酸钠(AOT)-异辛烷-氯化钾组成的反胶束体系萃取红芸豆蛋白(RKBP)。采用电导法考察AOT浓度对AOT-异辛烷-水反胶束体系含水量和临界增溶水量的影响,确定反胶束体系稳定的AOT浓度范围。采用单因素实验分别研究了AOT浓度、缓冲液pH、KCI浓度和萃取时间等因素对RKBP前萃率的影响,通过正交实验优化前萃条件。结果表明,不同AOT浓度对应的反胶束体系的临界含水量值(Wc)基本一致,反胶束体系能够增溶的水的体积随AOT浓度的增加而明显增大,反胶束体系稳定的AOT浓度上限值为2mol/L。正交优化获得反胶束法萃取RKBP的最佳前萃条件为:AOT浓度1.25mol/L,缓冲溶液pH7.5,KCl浓度0.05mol/L,萃取时间90min。在该最优工艺条件下,RKBP前萃率达到43.57%。 相似文献
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超声波辅助不同反胶束体系前萃7S和11S球蛋白的研究 总被引:1,自引:0,他引:1
主要研究了利用3种反胶束体系萃取7S、11S球蛋白,考查了缓冲溶液pH、WO、萃取温度、萃取时间等4因素对蛋白前萃率的影响规律,通过对3种反胶束体系提取7S、11S球蛋白的比较,筛选出最适于7S、11S蛋白的提取方法。在相同的条件下,AOT、CAB反胶束体系对大豆7S球蛋白的提取率一般高于对大豆11S球蛋白的提取率;而SDS反胶束体系对大豆7S球蛋白的提取率一般低于对11S球蛋白的提取率。为今后研究不同分子量大小的蛋白与反胶束"水池"微观结构相互关系的规律奠定基础。 相似文献
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两种反胶束体系对大豆蛋白前萃的比较研究 总被引:3,自引:0,他引:3
主要研究了以SDS/异辛烷/正辛醇反胶束体系萃取大豆蛋白的前萃过程,并分析了各因素对蛋白前萃率的影响,与AOT/异辛烷反胶束体系萃取大豆蛋白进行比较,SDS/异辛烷/正辛醇反胶束体系提取大豆蛋白的前萃率高于AOT/异辛烷反胶束体系。SDS/异辛烷/正辛醇反胶束体系萃取低温脱溶豆粕中蛋白质的最佳前萃工艺条件为:SDS浓度0.08 g/mL,加料量0.1000 g,反胶束溶液中含水量18,萃取时间30 m in,萃取温度40℃,增溶水pH 7,KC l浓度0.1 mol/L。 相似文献
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采用超声辅助2种反胶束体系萃取大豆油脂,分析超声波技术影响反胶束萃取大豆油脂的主要因素,并分析所得油脂的品质与之浸出法进行了对比.经试验研究得到,最佳的工艺条件为超声时间lh、超声温度60℃、超声功率300 W、全脂豆粉加入量为0.04 g/mL;2种不同反胶束体系萃取大豆油脂的萃取率差别不大,AOT反胶束法的前萃率为81.39%,AOT-Tween85反胶束法的前萃率为84.17%.反胶束萃取得到的油脂,酸价及过氧化值比浸出法要低;浸出法、AOT反胶束法、AOT-Tween85反胶束法3种方法提取的大豆油脂脂肪酸组成和含量基本相同,色泽、皂化值也基本相同,碘值稍有差异. 相似文献
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利用反胶束技术萃取大豆油,采用单因素试验和响应面试验优化大豆油中残留表面活性剂AOT的乙醇萃取法脱除工艺。结果表明:AOT脱除最佳工艺条件为乙醇体积分数60%、Na Cl浓度0.05 mol/L、p H 3.80、含油有机相与乙醇盐溶液体积比1∶3、振荡温度25℃,此时大豆油中AOT的残留率为0.062%。对反胶束萃取的大豆油与索氏抽提所得大豆油的品质进行对比发现,反胶束萃取油品质较好。 相似文献
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Functional and conformational characterisation of walnut protein obtained through AOT reverse micelles 下载免费PDF全文
Haifang Hu Yali Sun Xiaoyan Zhao Di Liu Lidan Fu Haitao Zhu 《International Journal of Food Science & Technology》2015,50(11):2351-2359
Walnut protein was extracted from defatted walnut flour by bis (2‐ethylhexyl) sodium sulfosuccinate (AOT) reverse micellar system and alkali solution with isoelectric precipitation. The functional and conformational characteristics of two proteins were investigated and compared. Walnut protein obtained through AOT reverse micelles was found to have higher extraction yield, solubility, emulsifying activity, foam capacities, water‐ and oil‐holding capacity compared to the protein from alkali solution along with isoelectric precipitation, while the surface hydrophobicity (H0), contents of disulphide bond (SS) and sulfhydryl group (SH) were relatively lower. The differences of H0, SS and SH contents could be due to the conformational changes of walnut proteins using two extraction methods. FTIR spectra and data showed that the reverse micelles caused the decrease in α‐helix, β‐sheet, random and β‐turn of walnut protein, the increase in the side‐chain structure content, which could be responsible for the modification of functional properties. 相似文献
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不同电解质溶液对反胶束萃取花生蛋白的影响研究 总被引:1,自引:1,他引:0
研究了KCl、NaCl、LiCl、MgCl2、NaNO3、KNO3、Na2SO4、MgSO4 8种不同的电解质对AOT/正己烷反胶束溶液萃取低温花生粕中花生蛋白的影响,对反胶束的含水量、蛋白质的提取率及通过SDS-PAGE电泳试验对蛋白质的亚基条带进行了比较。试验结果表明,电解质的种类会影响反胶束的含水量;阴离子与阳离子对反胶束溶液萃取大豆蛋白的前萃与后萃都有影响,电解质KCl和NaCl溶液所提取的蛋白质得率较高,分别为54.22%和50.19%;不同的电解质可以影响所得蛋白的亚基组成,可以用来分离不同的蛋白。 相似文献
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Fenglan Liu Xianchang Wang Xiaoyan Zhao Haifang Hu Fengliang Chen Yali Sun 《International Journal of Food Science & Technology》2014,49(2):626-633
The surface chemical composition and microstructure of walnut protein obtained through aqueous buffer and bis(2‐ethylhexyl) sodium sulfosuccinate (AOT) reverse micelles were determined by X‐ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The surfaces were characterised by XPS to monitor surface composition. The different components of C 1s, N 1s and O 1s peaks were provided precisely. By comparison with walnut protein surface from aqueous buffer, XPS analysis revealed that the O atomic percentage of walnut protein powder surface from AOT reverse micelles was higher, but the C and N atomic percentages were lower. The N/C ratio of the walnut protein powders using two extraction methods was similar, while significant difference was obtained in the O/N. The obtained results indicated that the reverse micelles could affect the C, O and N components on the surface of walnut protein powder. Protein microstructure after reverse micelle treatment showed many crystals. 相似文献
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Guanhao Bu Yingying Yang Fusheng Chen Zhixiong Liao Yanxiu Gao Hongshun Yang Runjie Li Kunlun Liu Junting Zhao 《International Journal of Food Science & Technology》2014,49(4):1079-1089
Reverse micelle extraction is a novel technology for the separation of plant components such as proteins and oil. In this study, sodium bis(2‐ethylhexyl) sulphosuccinate (AOT) reverse micelle system and AOT/Tween 85 reverse micelle system were used to extract soya bean protein and oil from soya bean flour. The physicochemical properties of the protein and oil extracted were investigated and compared with traditional extraction methods. The results showed that the efficiency of forward extraction of soya bean protein using an AOT/Tween 85 reverse micelle system was superior to that using an AOT reverse micelle system at the optimal extraction conditions. In addition, soya bean proteins extracted using reverse micelle extraction had no unordered structure under Fourier transform infrared spectroscopy. The acid and peroxide values of oil products from two reverse micelle extractions were lower than that from immersion. The results indicated that AOT/Tween 85 reverse micelle system is effective in extracting soya bean protein and oil. 相似文献
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新型反胶束系统增溶水的研究 总被引:4,自引:2,他引:2
研究了Tween,Span系列,Triton x-200,乳化剂OP,AOT,蔗糖酯溶解于异辛烷中的性质,在AOT/异辛烷体系中加入Twee-60:AOT为1时,增溶水从1.03(ml)增加到2.01,Tween-80:AOT为0.25时,增溶水理从1.03增加到1.21,W0值从24.3增加到28.5。 相似文献
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