Method for preparing pumpkin dietary fiber

A technology of dietary fiber and dietary fiber powder, applied in food preparation, food science, application and other directions, can solve the problems of food resource waste, decay and other problems, achieve high SDF content, improve functional properties, and increase the effect of SDF content

Inactive Publication Date: 2013-04-24
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, most pumpkins are planted in order to obtain pumpkin seeds, and only less than 30% of the pumpkin pulp is used for food processing and eating, and nearly 70% of the pulp has to be allowed to rot because it cannot be shipped out for sale and processing, resulting in an extreme shortage of food resources. What a waste, what a pity

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  • Method for preparing pumpkin dietary fiber
  • Method for preparing pumpkin dietary fiber
  • Method for preparing pumpkin dietary fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1Materials and reagents

[0033] Pumpkin (provided by Zhejiang Fulaisen Green Industry Group Company). Before use, peel and remove the flesh, cut into shreds and dry naturally, crush it mechanically, and screen the sample with 100 meshes for use.

[0034] Total dietary fiber determination kit (TDF 100A-1KT, purchased from Sigma-Aldrich), sodium nitrite, petroleum ether, sodium hydroxide, sodium carbonate, sulfuric acid, hydrochloric acid, phenolphthalein, citric acid, etc. are all analytically pure.

[0035] 2 Experimental equipment

[0036] Crusher, AL04 electronic balance, DELTA-320 pH meter, HH-2 water bath, ZHENGFCHEN double-layer constant temperature shaker, DHG-9240A blast drying oven, DL-5M centrifuge (with replacement rotor), 85-Z magnetic stirrer, T6 new century spectrophotometer, muffle furnace, digestion furnace, dietary fiber determination system (including CSF6, MULTISTIRRER6 and GDE enzyme digestion components, purchased from Italy VELP SCIENTIFICA Co.).

[0037] ...

Embodiment 2

[0073] Take 40g of pumpkin powder that has passed the 100-mesh sieve prepared by the method in Example 1, mix with 800g of water, extract at 40°C for 90min, centrifuge at 3000r / min for 30min, and obtain 230mL of supernatant for one extraction and after one extraction The filter residue after the primary extraction is extracted once again under the same conditions to obtain 210 mL of the secondary supernatant and the filter residue after the secondary extraction. The two supernatants are combined, and the supernatant 440mL is 10kD The polyethersulfone membrane was subjected to membrane filtration, and the concentrated solution that was not filtered through the membrane was collected to obtain 85 mL of concentrated solution for use. Other operations and conditions are the same as in Example 1, to obtain 25.67 g of pumpkin dietary fiber, total dietary fiber content of 84.26%, soluble dietary fiber content of 14.16%, and expansion force of 8.87 mL / g.

Embodiment 3

[0075] Take 40g of pumpkin powder that has passed the 100 mesh sieve prepared by the method in Example 1, mix with 2400g of water, extract at 40°C for 180min, centrifuge at 3000r / min for 30min, and obtain 840mL of supernatant for one extraction and after one extraction The filter residue after the primary extraction is extracted once again under the same conditions to obtain 780 mL of the secondary extraction supernatant and the filter residue after the secondary extraction. The two supernatants are combined to 1620 mL, and the supernatant is used Perform membrane filtration with a 10kD polyethersulfone membrane, and collect the concentrated solution that has not been filtered through the membrane to obtain 180 mL of concentrated solution for use. Other operations and conditions are the same as in Example 1, to obtain 27.87 g of pumpkin dietary fiber, 88.19% of total dietary fiber content, 16.12% of soluble dietary fiber content, and swelling power of 9.78 mL / g.

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Abstract

The invention discloses a method for preparing pumpkin dietary fiber. Pumpkin powder and water are mixed according to mass ratio of 1:20-60 and then extracted at the temperature of 40 DEG C for 90-180 minutes, and an ultra-filtration membrane of 10 kD is utilized to perform membrane filtration to supernatant to collect concentrated solution which is not filtered by the membrane. Filter residues are autoclaved for 10-40 minutes at the temperature of 40 DEG C and at 15-25 atmospheric pressure to obtain autoclaved filter residues, high pressure homogenization treatment is further performed to the autoclaved filter residues for 5-15 times at the high pressure of 6-12 MPa and at room temperature, each time requires 3-5 minutes, obtained homogeneous substance is mixed with the concentrated solution, and mixture is dried to obtain the pumpkin dietary fiber. A pumpkin dietary fiber product manufactured by the method contains more than 80% of total dietary fiber and more than15% of soluble dietary fiber (SDF), and has excellent water-holding capacity, expansibility, sodium nitrite adsorption performance and the like.

Description

(1) Technical field [0001] The invention relates to a method for preparing pumpkin dietary fiber. (2) Background technology [0002] Pumpkin, whose scientific name is Cucurbita moschata Duch, is also known as papaya and vegetable melon. It is an annual vine herb in the Cucurbitaceae and Cucurbita genus with white spots and pentagonal stalks. According to different traits, the cultivars are often divided into three categories: Chinese pumpkin (C.moschata Duch), Indian pumpkin (C.maxima Duch) and American pumpkin (C.pepo L.). Pumpkins are currently cultivated all over the world, with the largest cultivation area in Asia, followed by Europe and South America (Harry S.1989). Introduced in my country since the early Ming Dynasty, it has been planted from south to north, especially in North China, Northeast, Northwest, Central China, Southwest, Taiwan and other regions. [0003] Pumpkin has a well-developed root system, strong regeneration ability, strong drought resistance, rough cult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L1/212A23L1/308A23L19/00
Inventor 张拥军金晖郑龙华朱丽云
Owner CHINA JILIANG UNIV
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