脱色树脂在木糖脱色中的应用

介绍了脱色树脂在木糖液中的脱色性能，同时提出了脱色树脂脱色的最佳工艺条件。并且脱色树脂应用于木糖液脱色，既简化了生产工艺，又降低了工人的劳动强度，具有较好的现实意义。     

树脂在中药多糖脱色工艺中的研究进展

树脂是一类有机单体加交联剂、致孔剂、分散剂等添加剂聚合而成的吸附剂,主要应用于分离纯化过程中的填料,具有稳定性好、操作简便、回收率高等特点.利用树脂对中药多糖进行脱色不仅可以提高脱色率还能增加多糖的保留率,因此,在多糖提取分离纯化中占有重要的地位,本文通过查阅文献,综述了不同类型大孔树脂在中药多糖脱色工艺中的研究进展,...     

甜菊糖苷提取中脱盐脱色树脂的选择及流速对收率的影响

甜菊糖苷的工业提取中,通常以三氯化铁或硫酸亚铁为絮凝剂,对提取液进行絮凝处理。为提高后续吸附树脂的吸附量,改善产品品质,在大孔吸附树脂吸附前,对絮凝液进行脱盐脱色是至关重要的。通过对阳离子树脂001×7、001×14.5、001×16,与阴离子树脂330和D941相互组合,考察了不同组合下脱盐脱色的效果,以及不同流速对甜菊糖苷收率的影响。结果表明,选用阳离子树脂001×14.5与阴离子树脂D941相组合进行脱盐脱色,效果较好,且甜菊糖苷收率可达96.46%;脱盐脱色流速控制在3～4BV/h最佳。     

菊芋菊糖活性炭脱色的工艺条件

对菊芋菊糖提取液活性炭脱色工艺条件进行了研究,比较了几种不同厂家生产的不同规格的活性炭对菊芋菊糖提取液的脱色效果. 结果表明,仅粉末状活性炭TS4具有脱色作用,且脱色效果显著. 通过单因素实验和正交实验确定的菊芋菊糖提取液活性炭TS4脱色的最佳工艺条件为活性炭用量5 g/L,脱色温度80℃,pH值6.0,时间30 min. 在此条件下,脱色率达82.6%,菊糖回收率可达93.4%.     

甜菊糖苷提取中脱盐脱色树脂的选择及流速对收率的影响

甜菊糖苷的工业提取中,通常以三氯化铁或硫酸亚铁为絮凝剂,对提取液进行絮凝处理,达到初步除杂的目的,从而人为引入了大量的铁离子和酸根离子。为提高后续吸附树脂的吸附量,改善产品品质,在大孔吸附树脂吸附前,对絮凝液进行脱盐脱色是至关重要的。对阳离子树脂001×7、001×14.5、001×16,与阴离子树脂330和D941相互组合,考察了不同组合下脱盐脱色的效果,以及不同流速对甜菊糖苷收率的影响。结果表明,选用阳离子树脂001×14.5与阴离子树脂D941相组合进行脱盐脱色,效果较好,且甜菊糖苷收率可达96.46%;脱盐脱色流速控制在3-4BV/h最佳。     

丙烯酸类树脂脱色性能的研究

利用胺解法对丙烯酸类树脂进行脱色性能的研究,结果发现,树脂的交换容量对丙烯酰胺阴离子交换树脂的脱色性能有较大影响,因此要想得到较好的脱色效果,必须保证树脂具有较高的交换容量.在4种功能基类型中,以四乙烯五胺的树脂脱色效果最好.     

大孔吸附树脂对维生素C脱色研究

通过比较树脂的脱色效果、脱色条件、树脂再生方法对多种树脂进行了筛选实验.结果显示,D 201吸附树脂脱色性能良好,再生使用次数多,回收率稳定,适合维生素C交换液的脱色,确定了最佳实验条件.与传统工艺相比,树脂脱色工艺具有生产简单、环境污染小等优点.     

菊粉生产新技术研究进展

菊粉因其在食品及生理上的功能特性,近些年来倍受关注.在西方发达国家已经得到广泛应用,国内逐渐兴起.本文综述了近几年来在菊粉生产技术方面的研究成果,包括新鲜菊芋的保藏方法、热水浸提工艺的优化、脱色过程的最新应用成果、浓缩过程的优化以及干燥方法的选择.简单介绍了菊粉的功能以及国内外加工的现状.     

大孔吸附树脂对维药恰麻古粗多糖脱色纯化工艺研究

采用响应面法优化大孔树脂对维药恰麻古粗多糖脱色纯化的工艺。以多糖保留率、脱色率、蛋白质脱除率的综合评分为考察指标,考察样品浓度、洗脱流速、上样量对脱色纯化的影响。结果表明,最优工艺条件为:样品浓度1%,洗脱流速3.6 BV/h,上样量0.75 BV。在此条件下,恰麻古粗多糖脱色纯化综合评分63.74,结果稳定可靠,重复性良好,简单可行,为恰麻古粗多糖进一步分离纯化及实际生产奠定基础。     

大孔吸附树脂对维药恰麻古粗多糖脱色纯化工艺研究

采用响应面法优化大孔树脂对维药恰麻古粗多糖脱色纯化的工艺。以多糖保留率、脱色率、蛋白质脱除率的综合评分为考察指标,考察样品浓度、洗脱流速、上样量对脱色纯化的影响。结果表明,最优工艺条件为:样品浓度1%,洗脱流速3.6 BV/h,上样量0.75 BV。在此条件下,恰麻古粗多糖脱色纯化综合评分63.74,结果稳定可靠,重复性良好,简单可行,为恰麻古粗多糖进一步分离纯化及实际生产奠定基础。     

Physical and chemical properties of powder produced from spray drying of inulin component extracted from Jerusalem artichoke tuber powder

In this study, inulin was extracted from Jerusalem artichoke tuber (JAT) powder and then concentrated before spray drying. The aims of this study were to (1) determine the drying condition that provided high powder yield together with superior qualities of JAT inulin powder and (2) investigate the chemical and physical properties of inulin powder. The inulin extracts at different concentrations of 10, 20, and 30 °Brix were spray-dried and then compared. The spray drying experiments were conducted at the inlet/outlet air temperatures of 150/90, 170/90, and 190/90?°C for the chosen concentration of inulin extract. It appeared that spray drying of the 30 °Brix extract at the inlet/outlet drying air temperatures of 190/90?°C resulted in the highest value of powder recovery, bulk density, water solubility and the lowest moisture content and hygroscopicity in comparison with its counterparts. SEM micrographs showed that the powder produced by this condition was more stable and less sticky than others. The sugars, total fructo-oligosaccharides (1-kestose, nystose, and 1^F-β-fructofuranosyl nystose) and inulin-type fructans contents of powder were 12.88, 11.12, and 64.36?g/100?g of powder, respectively. The moisture sorption data and models developed in this work could be used for determining the suitable condition of surrounding air for inulin powder storage.     

Klebsiella pneumoniae发酵菊芋生产2,3-丁二醇的初步研究

对Klebsiella pneumoniae发酵菊芋块茎生产2,3-丁二醇进行了初步研究,通过摇瓶实验考察了不同碳源及培养基中微量元素对发酵的影响. 结果表明,菊芋是良好的发酵2,3-丁二醇的底物,以其为底物时产物浓度和生产强度比葡萄糖发酵提高了42%以上,培养基中不添加微量元素对菊芋发酵基本没有影响,因而可简化培养基成分以降低生产成本. 在发酵罐批式流加实验中,发酵56 h菊芋发酵的产物浓度和生产强度分别为81.47 g/L和1.45 g/(L×h),与葡萄糖发酵结果相当.     

菊芋对四川泡菜储藏期间品质变化影响的研究

菊芋富含氨基酸、糖分和维生素,多用来腌制咸菜或制成泡菜。以市售菊芋、白菜、萝b为原料在食盐浓度为6％、自然发酵条件下的含菊芋的泡菜和不含菊芋的泡菜进行比较实验,实验结果表明：添加菊芋对泡菜pH值、总酸度影响不大,明显增加了亚硝酸盐和氨态氮含量。     

自絮凝颗粒酵母发酵菊芋汁生产乙醇

分别采用分批和连续发酵方式,对自絮凝颗粒酵母Saccharomyces cerevisiae flo发酵菊芋汁生产乙醇的条件进行了优化. 与先酶解菊芋汁后再用自絮凝酵母发酵的分步糖化发酵相比,分批发酵过程中同时加入菊粉酶和自絮凝酵母的同步糖化发酵乙醇得率高,发酵时间短. 当菊芋汁总糖浓度分别为105和179 g/L时,同步糖化发酵的最高乙醇浓度达50和82.5 g/L,比分步糖化发酵高6.4%和13.8%. 在连续发酵过程中应用同步糖化发酵法,当稀释率为0.02 h-1时,乙醇浓度约为90 g/L时达到稳定状态,乙醇得率达到理论值的90%,生产强度达2.12 g/(L×h).     

菊芋的种植和开发利用

本文综述了一种优良能源作物菊芋的特点、种植和开发利用。期待对菊芋的进一步开发带来社会、环境和经济效益。     

菊芋的种植和开发利用

本文综述了一种优良能源作物菊芋的特点、种植和开发利用。期待对菊芋的进一步开发带来社会、环境和经济效益。     

Pure fructose syrup and ethanol production from high fructose corn syrup supplemented with Jerusalem artichoke juice

Saccharomyces cerevisiae ATCC 36859 preferentially consumes glucose from glucose–fructose mixtures. Synthetic media and complex media containing high fructose corn syrup supplemented with Jerusalem artichoke juice were used for the production of pure fructose syrup by the conversion of glucose to ethanol. Fructose was not converted in these processes. Increasing the concentration of Jerusalem artichoke juice increased the yields of ethanol and biomass and decreased the process time. A similar effect was obtained at a low juice concentration when a larger amount of biomass was used for the inoculum. The product from this process contained only fructose and ethanol. Use of food-grade materials results in a pure fructose syrup that is suitable for human consumption.     

盐析萃取菊芋发酵液中的2,3-丁二醇(英文)

The removal of solid impurities and separation of target products from a fermentation broth is becoming more tedious with the utilization of lignocelluloses as source of substrate.2,3-Butanediol,an important chemical used widely is also a main product of sugar-based fermentation carried out by Klebsiella pneumoniae.In this study,we investigated the use of salting-out extraction(SOE) that employed a K2HPO4/ethanol system consisting of 21% ethanol and 17% K2HPO4(mass fraction) to separate 2,3-butanediol from the viscous Jerusalem artichoke-based fermentation broth.After SOE,about 98% of solid matters was removed,and the viscosity decreased from 72.5 mPa s in the original fermentation broth to 4.4 mPa s in the top phase.The partition coefficient and yield of 2,3-butanediol reached 13.4 and 99%,respectively,and 89% of soluble proteins was removed from the broth.The results showed that SOE is an efficient way for isolating 2,3-BD from a highly viscous fermentation broth by removing much of the solid matters within the broth.