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研制板蓝根多糖胶冻,并对其品质进行评价。以模拟板蓝根制药残渣为原料,用水浸提板蓝根多糖,制备板蓝根多糖胶冻,浸提温度95℃,在特定料液比下浸提3次,每次浸提时间2h,提取的多糖液经过滤、离心后加入适量的卡拉胶溶液,再辅以果汁粉、绵白糖、柠檬酸、香精、色素等制成溶胶,室温胶凝后制得板蓝根多糖胶冻。结果表明,在板蓝根多糖提取液(18.9mg/mL)与卡拉胶溶液(20mg/mL)体积比3:7、绵白糖加量30mg/mL、果汁粉加量45mg/mL、柠檬酸加量0.6mg/mL时口感最佳(色素和香精的加入视需要而定),板蓝根多糖胶冻冻体均匀、色美味佳,其内聚性、黏附性、胶黏性、咀嚼性、弹性和硬度等力学性质能很好地满足食用需要。加入2.0mg/mL山梨酸钾并经高压蒸汽灭菌后,保质期可达5个月以上。利用板蓝根制药残渣提取多糖、制备胶冻是开发多糖保健食品的较好途径。 相似文献
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板蓝根多糖提取工艺的研究 总被引:1,自引:0,他引:1
从板蓝根中提取多糖,并用苯酚-硫酸测定其含量。方法:运用正交设计选取微波法和超声法的最佳工艺条件,用均匀设计选取渗漉法的最佳工艺条件,比较三种方法在最佳工艺条件下的得率。结果:超声法、微波法、渗漉法提取板蓝根多糖的得率分别为5.72%、6.24%、4、42%。微波法和超声法适合于板蓝根多糖的提取。 相似文献
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本文综述了多糖含量测定方法,主要包括化学法、气相色谱法、液相色谱法、阴离子交换色谱- 脉冲安培检测、体积排除色谱、薄层色谱法、毛细管电泳法、红外光谱法等,这些方法可为多糖含量测定提供一定的参考,并为多糖的更深入研究提供部分理论基础。 相似文献
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油枣多糖的酶法提取及其对多糖分子量分布的影响 总被引:3,自引:0,他引:3
本实验用正交试验法优化了油枣多糖的纤维素酶法提取工艺,同时采用分级醇沉和分步醇沉的方法探讨了热水提取与酶法提取的多糖分子量分布。结果表明,纤维素酶法提取油枣多糖的最佳提取条件为:pH4.5,提取温度60℃,酶添加量0.02%,提取时间2h;热水提取与酶法提取的多糖分子量分布无明显差异。 相似文献
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运用聚乙烯乙二醇(PEG)和二甲基亚砜(DMSO)共同诱导融合的方法,成功获得芥蓝与菘蓝原生质体融合的再生愈伤。利用9对SRAP随机引物对亲本和再生愈伤DNA进行扩增以鉴别再生愈伤的基因组成,结果表明:在再生愈伤的DNA条带中,与供体菘蓝相同的带占93.07%~94.16%,与受体芥蓝相同的条带占70.24%~75.78%,并有少量新增带和缺失带出现,再生愈伤的DNA带型为双亲的叠加,为真正的族间杂种愈伤。类平均法(UPGMA)聚类分析表明,5个杂种愈伤明显聚在一起,其遗传组成十分相似,与菘蓝的遗传关系较近,而与芥蓝的遗传关系稍远。 相似文献
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Carola I. Gosch Tanja Haase Bernhard A. Wolf Werner‐Michael Kulicke 《Starch - St?rke》2002,54(9):375-384
By the use of continuous polymer fractionation (CPF) the initial polymer can be separated into fractions of different molar masses, which makes it possible to obtain hydroxyethyl starch (HES) fractions tailor‐made for specific application. Two samples of HES (HES A and HES B) were fractionated by means of CPF. By size‐exclusion chromatography‐multi‐angle laser light‐scattering‐differential refractive index (SEC/ MALLS/DRI) measurements it was shown that CPF is able to remove the low‐molarmass components and to adjust the samples to various desired molar masses with lower polydispersities than the original samples. In terms of the weight‐average mean molar mass MW , the sol fractions have smaller molar masses than the starting sample, whilst the gel fractions have higher molar masses. Furthermore the radius of gyration RG could be determined for the initial sample HES B with 19.7 and 19.4 nm and also for some of its fractions. However, no general RG—MW relationship could be established for the HES samples fractionated using CPF. This is probably due to the complex branched structure of amylopectin. MW and MW/Mn of the six fractions obtained from HES A with MW = 161, 000 g/mol and MW/Mn = 4.7 ranged from 19, 000 to 362, 000 g/mol with MW/Mn from 1.8 to 3.1. The molar masses of the four fractions obtained from HES B with MW = 460, 000 g/mol and MW/Mn = 6.0 were between 18, 000 and 680, 000 g/mol with MW/Mn from 1.7 to 4.8 or between 202, 000 and 1, 005, 000 g/mol with MW/Mn from 2.7 to 4.7 depending on fractionation strategy. 相似文献
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研究大蒜多糖的分子质量分布,探索获得适宜于结构研究的不同分子质量分布的大蒜多糖样品的方法。利用不同体积量的丙酮和乙醇为沉淀剂,得到一系列不同分子质量的大蒜多糖样品,并利用基质辅助激光解析电离飞行时间质谱(MALDI-TOF-MS)法测定各样品的分子质量分布。结果表明,不同体积量的丙酮与乙醇分解沉淀所获得的样品中都含有低聚糖和多糖,糖的分子质量分布在362~2811u 之间;丙酮对大蒜多糖的沉淀能力比乙醇好,3 倍体积丙酮的多糖提取液所获得样品中低聚糖的含量高于4 倍体积的乙醇。因此,通过调整丙酮或乙醇的的比例可得到不同分子质量分布的大蒜寡糖、多糖。 相似文献
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M Sala 《Journal of the science of food and agriculture》2000,80(13):1887-1894
Changes in the amount, chemical composition and morphology of epicuticular wax in relation to rindstaining and peel pitting of Fortune mandarin fruits from trees grafted on different rootstocks and growing in different locations in the citrus area of Valencia (Spain) were studied. The epicuticular wax amount was higher on fruits from the north quadrant of the tree and was more influenced by the orchard location than by the tree rootstock. The main constituent classes of the epicuticular wax were alkanes > esters > ketones > aldehydes > fatty acids > primary alcohols > triterpenes. In the north quadrant of the tree the alkane and ester content in the wax of fruits from an orchard with fruits not rindstained in recent years was higher and the ketone and fatty acid content was lower than in fruits from an orchard with fruits rindstained in recent years. The epicuticular wax of Fortune mandarin peel had an amorphous structure in which crystalline plates and platelets were inserted. The wax layer was more damaged in fruits from the rindstained orchard. The results obtained suggest (a) that damage to the epicuticular wax structure may be a factor that can influence rindstaining and peel pitting of Fortune mandarin fruits but is not a determining factor, and (b) that wax yield is not related to rindstaining and peel pitting of Fortune mandarin fruits. © 2000 Society of Chemical Industry 相似文献