Method of preparing ginkgo protein superfine powders

A technology of ultrafine powder and ginkgo, which is applied in the field of preparation of ginkgo protein ultrafine powder, which can solve the problems of low extraction rate of ginkgo oil and affect the deep processing of ginkgo, and achieve the effect of maintaining the original quality and original flavor, maintaining no denaturation, and increasing the extraction rate

Active Publication Date: 2011-03-09
上海地湾电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CO 2 Supercritical extraction technology is widely used in vegetable oils and plant extracts, domestic literature reports the use of CO 2 The supercritical extraction process extracts ginkgo oil, but if the ginkgo is crushed by ordinary machinery, and then CO 2 With supercritical extraction, the extraction rate of ginkgo oil is very low, and a large amount of ginkgo oil and phenolic acids still remain in the powder, which affects the further processing of ginkgo

Method used

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  • Method of preparing ginkgo protein superfine powders
  • Method of preparing ginkgo protein superfine powders
  • Method of preparing ginkgo protein superfine powders

Examples

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Effect test

Embodiment 1

[0068] A preparation method of ginkgo protein superfine powder, comprising the following steps:

[0069] The first step, low-temperature drying: Freeze-dry the freshly collected ginkgo in autumn at -10°C to -50°C, for example, the temperature is selected as -20°C, -30°C, -40°C, then remove the shell and underwear, and dry the nuts Pulverize, rapid infrared measurement, obtain ginkgo coarse powder with water content weight percentage less than 6%, particle size in 10 mesh-50 mesh,

[0070] The second step, low-temperature wall breaking: at a temperature lower than 10°C, for example, -3°C, -5°C, -15°C, 0°C, 2°C, 5°C, 8°C, 9°C, the ginkgo Coarse powder adopts jet-type low-temperature jet mill (available in the market, Zhejiang Fengli Equipment Co., Ltd. DFJ-15 type) to break the wall and pulverize to obtain ginkgo superfine powder, and the jet mill classification wheel frequency is 20-60Hz, such as being selected as 30Hz, 40Hz , 50Hz, air pressure 0.8-1.5MPa, such as 0.9MPa, 1.0...

Embodiment 2

[0079] A preparation method of ginkgo protein superfine powder, comprising the following steps:

[0080] (1) Low-temperature drying: Freeze-dry the ginkgo fruits collected fresh every autumn at -10°C to -50°C for 6-50 hours, crush the shells with mechanical rollers, remove the shells and underwear, and crush the nuts into ginkgo Coarse powder, water content <6%, particle size between 10 mesh and 50 mesh,

[0081] (2) Low-temperature wall breaking: the low-temperature dried ginkgo coarse powder is broken and pulverized by a spray-type low-temperature airflow mill, the airflow mill grading wheel frequency is 20-60Hz, the temperature is <10°C, the air pressure is 0.8-1.5MPa, and the feeding speed is 1kg / h-3kg / h, crushing time 5-50min, the particle size of ginkgo superfine powder is 1-25μm, and the wall breaking rate is greater than 98%.

[0082] (3) Low-temperature degreasing: use CO 2 Supercritical extraction, extraction pressure 10-30MPa, extraction temperature 25-50°C, extra...

Embodiment 3

[0089] The preparation of embodiment 3 ginkgo superfine powder

[0090] Collect seven varieties of ginkgo, including Dafozhi, Bianfozhi, Qixingguo, and longan, in Taixing, Jiangsu, remove the shells, and quickly measure the water content by infrared. The water content is between 50% and 65%. Quickly measure the water content to obtain dried ginkgo fruit with a water content of figure 2 .

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Abstract

The invention discloses a method of preparing ginkgo protein superfine powders, which comprises following steps: drying fresh gingko at low temperature, breaking wall by air flow at low temperature, degreasing at low temperature, salt dissolution and salting out, 10KD-30KD ultrafiltration membrane separation, DEAE-cellulose column separation, freeze drying, jet milling at low temperature and etc. The prepared ginkgo protein superfine powder has molecular weight of 17KD-20KD, water content less than 5%, total protein greater than 90%, particle size of 1-25 mum and wall-broken rate of 98%. The prepared gingko oil yield is significantly increased by 20%-35% with respect to that obtained in a conventional way of critical extraction.

Description

technical field [0001] The invention relates to the field of protein preparation and extraction, in particular to a preparation method of ginkgo protein superfine powder. Background technique [0002] Ginkgo ginkgo contains a variety of biologically active nutrients. Every 100 grams of dried fruit contains 134g of protein, 3g of fat, 712g of carbohydrates, 196mg of calcium, 02mg of carotene, 044mg of thiamine, 26mg of niacin, and a small amount of ginkgo Biopharmaceutical active substances such as flavonoids, bilobalin, bilobalide, etc. Li Shizhen's "Compendium of Materia Medica" contains: "Ginkgo cooked food warms the lungs and nourishes qi, calms asthma and cough, reduces stool, and stops white turbidity. Raw food reduces phlegm, disinfects and kills insects." Ginkgo has obvious effects of inhibiting the growth of Mycobacterium tuberculosis, anti-cancer, Aging, anti-fatigue, anti-hypoxia effects. Eating it nourishes the heart and nourishes qi, nourishes the kidneys and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K14/415A23J1/00A61P37/04
CPCY02P20/54
Inventor 王成章陈西娟叶建中陈虹霞马维新周彬程耀波
Owner 上海地湾电子科技有限公司
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