Method for preparing maize germ powder rich in gamma-aminobutyric acid

A technology of corn germ powder and aminobutyric acid is applied in the field of corn deep processing, which can solve the problems of unrecoverable germ protein and waste of high-quality resources, and achieve the effect of increasing nutrients and efficacy and avoiding waste.

Inactive Publication Date: 2009-07-22
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method improves the oil yield, the germ protein that accounts for 20% of the total protein content in corn germ cannot be recovered, and the deoiled corn germ cake can only be used as feed, resulting in a waste of a large amount of high-quality resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 20kg of dry-processed corn germ and break it into 40-80 mesh powder, add 80L of n-hexane, stir for 1 hour at a temperature of 30°C and a stirring speed of 50 rpm, and perform the first degreasing deal with. Add 80 L of n-hexane again, stir for 1 hour at a temperature of 35° C. and a stirring speed of 50 rpm, and perform a second degreasing treatment. The twice defatted corn germ was collected by filtration. The defatted corn germ was then desolvated under reduced pressure at 30° C. for 6 hours to obtain 10.5 kg of defatted corn germ powder.

[0022] Weigh 10 kg of the above-mentioned defatted corn germ powder, add 600 L of phosphate buffer solution with a concentration of 0.06 mmol / L and a pH of 5.7 as the enrichment solution, and stir and react for 4 hours at 38°C with a stirring speed of 50 rpm. Set of gamma-aminobutyric acid. The above-mentioned corn germ after degreasing and enriching γ-aminobutyric acid was further ground with a colloid mill, and spray-dri...

Embodiment 2

[0025] Weigh 20kg of dry-processed corn germ and break it into 40-80 mesh powder, add 100L of n-hexane, stir for 2 hours at a temperature of 40°C and a stirring speed of 10 rpm for the first degreasing treatment . Add 100 L of n-hexane again, and stir for 2 hours at a temperature of 50° C. and a stirring speed of 10 rpm for a second degreasing treatment. The defatted corn germ was collected by filtration. The defatted corn germ was then desolvated under reduced pressure at 50° C. for 5 hours to obtain 10.2 kg of defatted corn germ powder.

[0026] Weigh 10 kg of the above-mentioned defatted corn germ powder, add 200 L of phosphate buffer solution with a concentration of 0.06 mol / L and add 13.3 g of calcium chloride (equivalent to 0.6 mmol / L of calcium chloride) to form a mixed solution with a pH of 5.7 The enrichment solution was stirred and reacted at 40°C and 10 rpm for 6 hours to enrich γ-aminobutyric acid. The degreased and enriched γ-aminobutyric acid corn germ was fur...

Embodiment 3

[0029] Weigh 20kg of dry-processed corn germ and break it into 40-80 mesh powder, add 120L of n-hexane, stir for 0.5 hours at a temperature of 50°C and a stirring speed of 100 rpm for the first degreasing treatment . Add 120 L of n-hexane again, and stir for 0.5 hour at a temperature of 40° C. and a stirring speed of 100 rpm for the second degreasing treatment. The defatted corn germ was collected by filtration. The defatted corn germ was then desolvated under reduced pressure at 40° C. for 4 hours to obtain 10.4 kg of defatted corn germ powder.

[0030]Take above-mentioned defatted corn germ powder 10kg, add by adding 0.22kg L-glutamic acid, 0.9g vitamin B6 (corresponding to the vitamin B6 of 0.02mmol / g L-glutamic acid) in 400L 0.08mol / L phosphate buffer solution and 2.44g of calcium chloride (calcium chloride equivalent to 0.1mmol / g L-glutamic acid) to form a mixed solution with a pH of 5.7 as the enrichment solution, and stirred and reacted at 50 rpm at 42°C for 8 hours t...

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PUM

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Abstract

The invention discloses a method for preparing corn germ flour abundantly containing gamma-propalanine. The method aims to provide the method for preparing the corn germ flour abundantly containing the gamma-propalanine and overall nutritive elements of corn germ. The corn germ obtained through the processing of corn flour by a wet method is subjected to degreasing twice; the degreased corn germ is subjected to solvent removal at reduced pressure; the degreased corn germ flour is soaked in an enrichment solution; the rich gamma-propalanine is stirred; the enrichment solution is a phosphate solution, or a mixed solution prepared by adding calcium chloride to a phosphate buffering solution, or the mixed solution prepared by adding L- glutamic acid, vitamin B6 and the calcium chloride to the phosphate buffering solution; and a product is ground and dried to prepare the corn germ flour abundantly containing the gamma-propalanine. Based on keeping original nutritive compositions, mixture ratio and utilization efficiency, the corn germ flour increases the nutritive compositions and efficacy of GABA and provides novel health-care food with overall nutrition for people.

Description

technical field [0001] The invention belongs to the field of corn deep processing, and more specifically relates to a preparation method of corn germ powder rich in γ-aminobutyric acid. Background technique [0002] γ-Aminobutyric acid (GABA) is a non-protein amino acid, which has two sources, one is naturally present in animals and plants, and the other is glutamic acid through the action of glutamic acid decarboxylase (GAD). transformed. With the deepening of people's research, its role in health care has been gradually recognized by people, and it has become a new type of functional food factor. At present, people's research on GABA is mainly reflected in how to enrich more GABA in raw materials, but not enough attention is paid to the role of nutritional components in raw materials in terms of health care during enrichment. Due to the lack of research on the content of glutamic acid in corn germ, in recent years, many researchers in Japan and my country have mostly car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/305A23L1/10A23L7/20A23L33/175
Inventor 李楠王玲玲
Owner TIANJIN UNIV OF COMMERCE
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