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Method for preparing galactomannan from Trigonella foenum-graecum
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A technology of galactomannan and mannanase, which is applied in the direction of fermentation and the like, can solve the problems such as being unable to meet the requirements of rapid dissolution and increasing viscosity, etc.
Active Publication Date: 2021-09-10
承德康尔润食品有限公司
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The whole dissolving time of the galactomannan glue made is 25min, and the viscosity of 1% glue solution reaches 350mPa.s (170s -1 ), although the solubility of galactomannan gums from other plant species has improved, it still cannot meet people's requirements for rapid dissolution and increased viscosity
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Embodiment 1
[0024] One of the following steps from a method for preparing fenugreek galactomannan of:
[0025] (1) for peeling fenugreek, then add 3% water quenching 10min;
[0026] (2) peeling the quenched after crushing fenugreek, through 25 mesh screen; and then into a sand mill sanded through a 60 mesh sieve;
[0027] Water (3) added in step (2) 5 times the mass of material, uniformly mixed to prepare an aqueous solution, was added and mannanase galactosidase, hydrolysis, enzymatic hydrolyzate prepared; the amount of mannanase per gram of step (2) of the mixed material 150U; a-galactosidase is added in an amount per gram of step (2) of the mixed material 80U; the hydrolysis temperature is 45 ℃, 3H hydrolysis time;
[0028] (4) a boiling water bath in step (3) Preparation of the inactivated enzyme solution was cooled to room temperature, filtered, decolorized with charcoal, and concentrated to give a syrup;
[0029] (5) Step (4) Preparation of the syrup was dried in vacuo to obtain a galac...
Embodiment 2
[0032] In order to increase the viscosity of galactomannan and dissolved in water while reducing the time to reach maximum viscosity, the inventors try to use other plant seeds containing galactomannan together with fenugreek extract, the mass ratio of 1: 1, Experimental Methods As in Example 1, selected plants include Ceibo, cassia, wood lattice, Hu beans, pepper hemp, Crotalaria, Zenia, Sesbania; configuration of sample solution concentration of 1%, a measurement sample was dissolved in water to a maximum viscosity time and viscosity, measurement results are figure 1 with figure 2 .
[0033] Depend on figure 1 with figure 2 Visible, samples were extracted together with fenugreek Holi beans dissolve the shortest time to reach maximum viscosity in water, viscosity maximum.
[0035] Selection and fenugreek Hu beans as a raw material were extracted, and Exploration fenugreek Hu beans with optimum ratio, the amount of mass set in fenugreek and Hu bean ratio of 1: 3,1: 2,1: 1,2: 1,3: 1,4: 1,5: 1,6: 1, the same method as experimental Example 1; after the extraction is complete, the configuration of the sample solution concentration of 1%, a measurement sample is dissolved and the time to reach maximum viscosity viscosity in water results are image 3 with Figure 4 .
[0036] Depend on image 3 with Figure 4 Seen, the mass ratio of fenugreek Hu beans is 3: 1, the maximum viscosity of the sample was dissolved in water and the shortest time, the maximum viscosity.
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Abstract
The invention discloses a method for preparing galactomannan from Trigonella foenum-graecum. The method comprises the following steps: firstly, peeling Trigonella foenum-graecum and Gleditsia heterophylla, then adding water for conditioning, mixing and crushing; then feeding into a sand mill for sanding; adding water, uniformly mixing to prepare an aqueous solution, then adding mannase and galactosidase, and hydrolyzing to prepare an enzymatic hydrolysate; and finally, inactivating the enzymatic hydrolysate, cooling to room temperature, filtering, decolorizing, concentrating to obtain syrup, and performing vacuum drying to obtain the galactomannan. The Trigonella foenum-graecum and Gleditsia heterophylla are jointly used as extraction raw materials for preparing the galactomannan, compared with galactomannan obtained by Trigonella foenum-graecum alone, the galactomannan prepared in the invention is better in solubility and higher in viscosity, mannase and galactosidase are adopted for micro-fermentation, part of galactomannan is decomposed into mannanoligosaccharide, and the prepared galactomannan is more easily absorbed and utilized by a human body.
Description
Technical field [0001] The present invention belongs to the technical field of natural food additives, particularly relates to a process for the preparation of the galactomannan of fenugreek from. Background technique [0002] It is a galactomannan polysaccharide comprising mannose backbone with galactose side groups, which linearly (1-4) - β-D mannose backbone connected to their connecting point is connected to the 6-α- type D-galactose polysaccharides, i.e., α-D-pyran-1-6- type couplinggalactose. Galactomannan from fenugreek gum, guar gum, locust bean gum and tara gum, galactomannan different plant sources have different degree of branching. [0003] Fenugreek (Latin name: Trigonella foenum-graecum L.), is a genus of leguminous fenugreek fenugreek of the study said. Annual herb, 30-80 cm high, root, stem erect three pinnate compound leaves, petioles spreading, April-July flowering, fruiting period from July to September. Fenugreek as starting material can be galactomannan, pat...
Claims
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