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仿刺参肠道多糖的纯化及理化分析 总被引:2,自引:0,他引:2
目的:对仿刺参肠道多糖进行纯化,并对纯化产物进行理化分析。方法:使用葡聚糖凝胶(G-100)层析柱分离出两种仿刺参肠道多糖,选取其中多糖A进行研究。使用葡聚糖凝胶(G-100)柱层析法和琼脂糖凝胶电泳法进行纯度检测,葡聚糖凝胶(G-200)柱层析测定分子质量,高效液相色谱法确定其单糖组分,并结合红外吸收光谱法与核磁共振对其结构进行初步检测。结果:实验所得纯化产物多糖A为均一组分,主要含有氨基糖醛酸、氨基半乳糖盐酸盐和岩藻糖3种单糖,并含有少量的氨基葡萄糖、半乳糖。其中岩藻糖有α和β两种构型,以α-岩藻糖硫酸酯残基、β-岩藻糖硫酸酯残基形式存在。分子质量约为18.8×104D。结论:该纯化产物多糖A为一种酸性多糖,推测其为硫酸软骨素类。 相似文献
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目的:以仿刺参纵肌多糖为对象,探讨其纯化方法,并对其抗氧化活性进行研究。方法:仿刺参纵肌经木瓜蛋白酶水解、三氯乙酸去蛋白、Sephacryl S-400凝胶柱层析,得到一种多糖,进行红外光谱、分子质量和硫酸基含量测定,并进行硫酸酯化及体外抗氧化实验。结果:红外光谱初步显示所得纯化多糖具有酸性糖胺聚糖结构,分子质量约为676kD,硫酸基含量为10.98%,取代度为0.285;硫酸酯化后硫酸基含量为17.43%,取代度为0.360;纯化多糖及酯化多糖都具有抗氧化活性。结论:仿刺参纵肌多糖随着硫酸基含量及取代度的提高,抗氧化活性逐渐增强。 相似文献
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目的:探究仿刺参卵多糖的结构及体外抗肿瘤活性。方法:通过酶解醇沉获得仿刺参卵粗多糖(polysaccharides from Apostichopus japonicus spawn,SPS);通过色谱柱纯化后进行理化性质分析;采用噻唑蓝法研究卵多糖对HeLa、HGC-27细胞的体外增殖抑制作用。结果:获得3 种不同多糖组分SPS-1、SPS-2、SPS-3,对干预的肿瘤细胞均有显著抑制作用。SPS-1抑制作用最强,对HeLa及HGC-27细胞的最高抑制率分别为98.04%、99.4%。结论:从仿刺参卵中分离出3 种多糖组分,均表现出一定的抑制肿瘤细胞增殖活性。 相似文献
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小根蒜多糖的提取纯化及其单糖组分的鉴定 总被引:1,自引:0,他引:1
对小根蒜汁液进行反复脱脂、除蛋白、去果胶、分级醇沉处理,并经过凝胶柱SephadexG-25、SephadexG-50进行纯化,得到了单一的小根蒜多糖。通过对小根蒜多糖酸水解液进行薄板层析(TLC)和液相色谱分析(HPLC),确定了其单糖组分主要为果糖和葡萄糖,比例为7.98:1。 相似文献
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茶叶多糖的提取纯化及其单糖组分的鉴定 总被引:11,自引:1,他引:11
研究了用水煮醇沉法提取茶叶多糖,用savage法除蛋白,苯酚-硫酸法测多糖含量,通过正交试验确定茶叶多糖的最佳提取条件;粗多糖经Sephadex-100柱层析纯化,得到精制茶叶多糖;薄层层析法鉴定单糖组分。结果表明:最佳提取条件为95℃,料液比1∶20(g:mL),提取时间2h,提取3次,茶叶多糖含量为35.92mg/g。茶叶多糖中含有2种不同的多糖,水解得到单糖D-半乳糖、D-甘露糖、D-葡萄糖、L-阿拉伯糖等。 相似文献
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山药多糖RDPS-Ⅰ组分的纯化及理化性质的研究 总被引:13,自引:0,他引:13
山药经水浸提分离,浸提液脱蛋白,透析,乙醇沉淀物经DEAE-52纤维素及Sephdex G-100色谱纯化得白色粉末状多糖RDPS-I.Sepharose CL-6B凝胶色谱分析表明RDPS-I为多糖纯品.定性化学反应表明RDPS-I不含核酸、蛋白质、酚类物质和糖醛酸,是一种非淀粉类中性纯粹多糖,比旋光度[α]22 D(H2O)为+188.4(c=0.8),特性粘度[η]为16.48×103(mL/g),相对分子质量为42 200,完全酸水解后纸层析及气相色谱分析确定RDPS-I的糖基组成为葡萄糖、甘露糖和半乳糖,摩尔比为10.370.11. 相似文献
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The effects of salt type and preheating temperature on the texture and quality of pickled cucumber were studied. Four types of salt were used: bay salt, purified salt, and 2 prepared salts, 1 containing the same amount of Ca2+ and Mg2+ as those of bay salt, and the other containing a 3‐fold higher concentration of Ca2+ and Mg2+ than bay salt. Two different temperatures were used for the salt solutions: 98 °C and 65 °C. All samples were fermented for 30 d at 25 °C. To evaluate the quality of the pickled cucumber with fermentation, the pH level, total acidity, alcohol insoluble solids, and mineral contents were analyzed. Texture and sensory evaluation as well as a microscopic observation were performed to observe the textural change of the pickled cucumber during fermentation. Pickled cucumbers with 98 °C of preheated brine showed better texture than the ones with 65 °C. The pickled cucumbers brined with prepared salt, 1 which had the same amount of Ca2+ and Mg2+ to bay salt, displayed the best result among the samples tested, in terms of sensory, textural, and physical properties. 相似文献
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目的 建立盐干海参的核酸提取及其分子鉴定方法。方法 选取5种盐干海参, 采用直接处理、洗涤处理和浸泡处理3种处理方式, 比较磁珠法和离心柱法两种核酸抽提方式的提取质量, 并采用聚合酶链式反应(polymerase chain reaction, PCR)法对提取的核酸进行分析确认。结果 同一种抽提方式不同海参处理组间核酸质量没有显著差异, 而两种抽提方式间核酸质量差异显著, 其中磁珠法提取的核酸得率高、纯度高, 而离心柱法提取的核酸得率及纯度均偏低。经PCR扩增验证, 磁珠法提取的核酸效果较佳。将扩增产物进行测序及系统进化分析发现5种海参实际种类与标注名称仿刺参存在较大差异。结论 盐干海参处理方式对核酸提取结果影响不大, 磁珠法提取核酸效果较好,单纯依靠COI和16S rRNA基因通用引物并不能对所有的海参种类进行鉴定。 相似文献
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采用30%、50%、70%、90%的乙醇回流提取芒果核多酚物质,把提取液浓缩浸膏,依次采用硅胶柱层析法、薄层色谱跟踪检测、红外光谱、核磁共振等方法进行检测分析。结果表明,30%和50%乙醇纯化物中主要成分是鞣酸,70%乙醇纯化物是鞣花酸,90%乙醇纯化物是蓖麻油酸,进一步的纯化单体分别为芥酸以及油酸甘油酯;抗氧化活性试验表明,芒果核多酚及其纯化物对羟基自由基(·OH)、DPPH自由基(DPPH·)清除作用明显,说明芒果核多酚具有很好的抗氧化活性,为芒果核的综合开发利用提供重要依据。 相似文献
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Ravi Harini;Venkatachalapathy Natarajan;C. K. Sunil; 《Journal of food science》2024,89(7):3995-4018
Sea cucumbers, members of the echinoderm class Holothuroidea, are marine invertebrates with ecological significance and substantial commercial value. With approximately 1700 species, these organisms contribute to marine ecosystems through nutrient cycling and face various threats, including overfishing and habitat loss. Despite their importance, they are extensively exploited for diverse applications, from seafood to pharmaceuticals. This study investigates sea cucumbers' nutritional profile and bioactive elements, emphasizing their role as sources of essential compounds with potential health benefits. The demand for sea cucumbers, especially in dried form, is significant, prompting exploration into various drying techniques. Examining the global trade in sea cucumbers highlights their economic importance and the conservation challenges they face. Conservation efforts, such as awareness campaigns and international collaboration, are evaluated as essential steps in combating illicit trade and promoting the sustainable stewardship of sea cucumber populations. 相似文献
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本文以加拿大红参(Parastichopus californicus)为原料,研究其最优酶解工艺。基本成分测定结果表明加拿大红参的蛋白质含量73.33%,脂肪0.97%,灰分23.85%,粘多糖1.68%。研究以多肽得率为指标确定了加拿大红参的最优酶解工艺,并估算了其酶解液多肽分子量分布。实验使用枯草杆菌中性蛋白酶与风味蛋白酶组成的复合酶对海参进行酶解,最优酶解工艺:酶解温度为55℃、p H为7.5、料液比1∶5(g/m L)、酶解时间为3 h、酶加量为1.05%,最优条件下,酶解液中多肽得率为13.99%,通过Sephadex G-50对加拿大红参酶解液多肽分子量分布范围进行估算,得出分子量分布为1133129457 u。 相似文献
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为探究荠皮多糖在食品领域的应用潜力,利用X射线衍射光谱分析、热重分析、Zeta电位分析、乌氏粘度测定法、红外光谱法等方法研究纯化的荸荠皮多糖WVP-1和WVP-2的结晶性、稳定性、粘度等理化特性,并结合细胞抗氧化实验和AAPH诱导的红细胞溶血实验评估两种多糖的抗氧化活性。结果表明,WVP-1和WVP-2的结晶区域较少,主要以无定型态存在,玻璃化温度分别为61.30和69.50 ℃,热分解温度分别为290.50和308.50 ℃,Zeta电位分别为9.60和-18.50 mV,特性粘度分别为5.33×10-3和3.80×10-2 mL/mg,果胶类多糖WVP-2的酯化度为15.00%。此外,在62.5~1000 μg/mL浓度范围内,WVP-1和WVP-2能有效抑制AAPH诱发HepG2细胞内活性氧水平升高,也能有效保护红细胞免受AAPH攻击发生氧化溶血。综上所述,WVP-2比WVP-1具有更好的稳定性、粘度和和抗氧化活性,并且WVP-2属于低酯果胶,可作为食品添加剂和功能活性成分应用于食品领域。 相似文献
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Peter J. Bechtel Alexandra C. M. Oliveira Necla Demir Scott Smiley 《Food Science & Nutrition》2013,1(1):63-73
Giant red sea cucumbers, Parastichopus californicus, are commercially harvested in the U.S. Pacific Northwest; however, the nutritional and chemical properties of its edible muscle bands and body wall have not been fully elucidated. In particular are the fatty acid profiles of P. californicus tissues, which have not been documented. Sea cucumbers were delivered live and muscle bands and body wall freeze dried, vacuum packed, and stored at −30°C until analyzed. Proximate composition of freeze‐dried tissues varied greatly with muscle bands being composed of 68% protein, 12% ash, 9% carbohydrate, and 5% lipids, while the body wall was composed of 47% protein, 26% ash, 15% carbohydrate, and 8% lipids. The hydroxyproline, proline, and glycine contents of the body wall were much higher than those in muscle bands, consistent with the larger amount of connective tissue. Calcium, magnesium, sodium, and iron contents were higher in the body wall than those in muscle bands, whereas the opposite was observed for zinc content. Total long‐chain n‐3 fatty acid contents were 19% and 32% of total fatty acids in body wall and muscle bands, respectively. Muscle bands had higher content of eicosapentaenoic acid (20:5n‐3) than body wall at 22.6% and 12.3%, respectively. High content of arachidonic acid (20:4n‐6) was recorded in both body wall (7.1%) and muscle bands (9.9%). Overall, the fatty acid profiles of body wall and muscle bands of P. californicus resemble those described for other species; however, the distribution and occurrence of certain fatty acids is unique to P. californicus, being representative of the fatty acid composition of temperate‐polar marine organisms. The chemical characterization of freeze‐dried edible tissues from P. californicus demonstrated that these products have valuable nutritional properties. The body wall, a food product of lower market value than muscle bands, could be better utilized for nutraceutical and pharmaceutical applications. 相似文献
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对桦褐孔菌多糖的脱色方法和单糖的组成进行研究。首先考察活性炭粉、过氧化氢、壳聚糖、聚酰胺层析柱的脱色效果。经脱蛋白、脱色后的多糖进行1-苯基-3-甲基-5-吡唑啉酮衍生化,采用高效液相色谱法分析单糖组成。4 种脱色方法对桦褐孔菌多糖均有效果,活性炭和聚酰胺层析柱脱色效果明显优于过氧化氢和壳聚糖脱色法,聚酰胺层析柱脱色是较好的方法,其脱色率为89.3%、多糖保留率为91.7%。结果表明:桦褐孔菌多糖粗品主要由甘露糖、鼠李糖、葡萄糖、半乳糖、木糖和阿拉伯糖组成,其物质的量比为2.13∶1.36∶7.01∶2.98∶1∶1.78。 相似文献