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首页> 美国卫生研究院文献>Journal of Food Science and Technology >Defatted coconut residue crude polysaccharides as potential prebiotics: study of their effects on proliferation and acidifying activity of probiotics in vitro
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Defatted coconut residue crude polysaccharides as potential prebiotics: study of their effects on proliferation and acidifying activity of probiotics in vitro

机译：脱脂的椰子残渣粗多糖作为潜在的益生元：其对益生菌体外增殖和酸化活性的影响研究

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This paper reports on the extraction, partial characterization and the potential application of crude polysaccharides from defatted coconut residue as a prebiotic. The coconut residue was defatted and extracted to obtain the crude polysaccharides and its physicochemical properties were determined. The crude polysaccharides were assessed for monosaccharide composition, total carbohydrate content, reducing sugar concentration and protein content determination. The functional group and structural elucidation of crude polysaccharides was also done using Fourier transform infrared spectra analysis. The product was then subjected to artificial human gastric juice treatment to determine digestibility. Finally, an in vitro proliferation and acid production by two probiotic bacteria namely Lactobacillus casei Shirota and Lactobacillus bulgaricus were included in this study. It was found that the defatted coconut residue contained ash (0.54%), moisture (55.42%), protein (1.69%), crude fat (17.26%) and carbohydrate (25.73%). The percentage of crude polysaccharides extracted was 0.73 ± 0.04. The two fractions of monosaccharides obtained were glucose and fructose. Total carbohydrate content of DCR was 13.35% (w/v). The quantitative value of the reducing sugars obtained was 20.71%. Protein content in the crude polysaccharides was 0.009% and the peaks which indicated the presence of protein were observed at around 1640 cm−1 (amide I) and 1530 cm−1 (amide II). DCR crude polysaccharides were highly resistant (88%) to hydrolysis when subjected to artificial human gastric juice. The product was found to markedly stimulate two tested probiotics to proliferate and produce organic acids. All the above findings are supportive of the fact that polysaccharides extracted from DCR, an industrial waste, have a vast potential to be exploited as novel prebiotics.Electronic supplementary materialThe online version of this article (doi:10.1007/s13197-016-2448-9) contains supplementary material, which is available to authorized users.
机译：本文报道了脱脂椰子渣中益生元粗多糖的提取，部分表征及其潜在应用。将椰子渣脱脂并提取以获得粗多糖，并测定其理化性质。评估粗多糖的单糖组成，总碳水化合物含量，还原糖浓度和蛋白质含量测定。还使用傅立叶变换红外光谱分析完成了粗多糖的官能团和结构解析。然后将产物进行人工人胃液处理以确定消化率。最后，这项研究包括了两种益生菌细菌干酪乳杆菌Shirota和保加利亚乳杆菌的体外增殖和产酸作用。发现脱脂的椰子残渣含有灰分（0.54％），水分（55.42％），蛋白质（1.69％），粗脂肪（17.26％）和碳水化合物（25.73％）。提取的粗多糖的百分比为0.73±0.04。获得的单糖的两个部分是葡萄糖和果糖。 DCR的总碳水化合物含量为13.35％（w / v）。得到的还原糖的定量值为20.71％。粗多糖中的蛋白质含量为0.009％，在1640cm -1 （酰胺I）和1530cm -1 （酰胺II）。 DCR粗多糖在经受人造人胃液时具有很高的抗水解性（88％）。发现该产品能明显刺激两种经过测试的益生菌增殖并产生有机酸。以上所有发现均支持从DCR（一种工业废料）中提取的多糖具有巨大的潜力，可被用作新型益生元。电子补充材料本文的在线版本（doi：10.1007 / s13197-016-2448-9） ）包含补充材料，授权用户可以使用。

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