Prebiotics composition and application thereof
A prebiotic and composition technology, applied in the field of oligosaccharide nutritional compositions, can solve the problems of reducing the fermentation speed and fermentation capacity of short-chain oligosaccharides, and achieve the enhancement of immunity and comprehensive functions of the body, good health and growth, The effect of increasing the content
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Embodiment 1
[0030] Embodiment 1. Experimental purpose and materials.
[0031] The purpose of the experiment: To compare the prebiotic effects of the prebiotic combination of galacto-oligosaccharide, fructo-oligosaccharide and isomerized lactose fed to mice at different dosages. The infant formula milk powder without prebiotics was used as the control, and compared with breast milk Compare.
[0032] group
[0033] Among them, the infant formula milk powder without prebiotics was produced in Hebei Sanyuan Food Co., Ltd. on a pilot basis.
Embodiment 2
[0034] Embodiment 2, intestinal microorganism detection.
[0035] Before the end of each experimental period, fresh fecal samples were taken through the anus in the morning to detect the intestinal flora. The detection principle of this method is as follows:
[0036] 16S / 18S / ITS rDNA, the sequence includes conserved regions and hypervariable regions, among which the conserved regions have little difference among microbial species, and the hypervariable regions have genus or species specificity, and have certain differences with different genetic relationships. Therefore, 16S / 18S / ITSrDNA can be used to reveal the characteristic nucleic acid sequences of biological species, and is considered to be an indicator suitable for microbial phylogeny and taxonomic identification. Nowadays, 16S / 18S / ITS rDNA amplicon sequencing technology has become an important means to study the composition and structure of microbial communities in environmental samples.
[0037] 16S rDNA amplicon seq...
Embodiment 3
[0041] Example 3, detection of short-chain fatty acids.
[0042] Preparation of fecal samples: For the determination of SCFAs, 1 g of samples were thawed in ice water, diluted 10X in MilliQ, and homogenized for 10 minutes using a stomacher (IUL Instruments, Barcelona, Spain). 350 μL homogenized feces were mixed with 200 μl 5% (v / v) formic acid, 100 μL 1.25 g / L 2-ethylbutyric acid (Sigma-Aldrich, Zwijindrecht, Netherlands) and 350 μl MilliQ. Samples were centrifuged at 14,000 rpm for 5 minutes to remove large particles and supernatants were stored at -20°C. For FISH analysis and lactate measurement, samples were thawed in ice water, diluted 10X (w / v) in phosphate buffered saline, pH 7.4 (PBS) and homogenized for 10 minutes using a stomacher. Homogenized feces were stored at -20°C.
[0043] Short-chain fatty acid analysis: Quantitative determination of short-chain fatty acids (SCFA), formic acid, acetic acid, propionic acid, n-butyric acid, by a Marian 3800 gas chromatograph...
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