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Germanium-enriched yeast and preparation method thereof

A yeast and dry yeast technology, applied in biochemical equipment and methods, food preparation, microorganism-based methods, etc., can solve the problems of difficult industrial production, high organic germanium content, short production cycle, etc. The effect of high organic germanium content and low cost

Inactive Publication Date: 2010-05-19
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to overcome the technical defects and technical problems of low germanium-enrichment amount of existing yeast, long fermentation period, high cost, and difficulty in industrial production, and provide a germanium-enrichment method for yeast, which is not carried out in the yeast culture process. Instead, germanium-rich yeast is directly produced by dry yeast, which has a short production cycle, low cost, and high content of organic germanium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Concrete operation steps of the present invention are as follows:

[0027] Take the waste dry yeast from the brewery, and pass through 80 mesh sieve to remove impurities;

[0028] Add 10g germanium dioxide (GeO2) in 50ml distilled water, after fully dissolving, use

[0029] The pH value of potassium hydroxide adjusted germanium solution is 5.8;

[0030] (3) Add the germanium solution into the dry yeast sieved in step (1) according to the ratio of 50ml germanium solution: 1000g dry yeast;

[0031] (4) Extrude the dry yeast added with germanium solution in step (3) with an extrusion blasting machine. The extrusion blasting machine can be SPJ-40 extrusion blasting machine, manufactured by Shaanxi Deai Food Co., Ltd. or Huanan Agricultural Developed by the Laboratory of Medium and Low Temperature Processing of Food at the University. The puffing condition is:

[0032] Expansion temperature: 130°C

[0033] Feed rate: 250g / min

[0034] Screw speed: 20Hz

[0035] Water ...

Embodiment 2

[0040] Concrete operation steps of the present invention are as follows:

[0041] (1) Get beer waste yeast, sieve to remove impurities; present embodiment preferably crosses 80 mesh sieves;

[0042] (2) add 8g germanium dioxide (GeO2) in 50ml distilled water, after fully dissolving, adjust the pH value of germanium solution with sodium hydroxide to be 5.0;

[0043] (3) Add the germanium solution into the dry yeast sieved in step (1) according to the ratio of 100ml germanium solution: 1000g dry yeast;

[0044] (4) The dry yeast added with germanium solution in step (3) is extruded with an extrusion blasting machine, and the extruded conditions are:

[0045] Expansion temperature: 125°C

[0046] Feed rate: 200g / min

[0047] Screw speed: 15Hz

[0048] Water supply: 5g / 100g dry yeast

[0049] (5) The yeast after puffing is washed three times with pure water, and centrifuged at 3500r / min for 15min;

[0050] (6) After washing and centrifuging, the precipitate was dried at 50° ...

Embodiment 3

[0053] Concrete operation steps of the present invention are as follows:

[0054] (1) Take the waste beer yeast, and pass through 80 mesh sieves to remove impurities; (depending on the yeast, other purpose sieves can also be used);

[0055] (2) add 16g germanium dioxide (GeO2) in 50ml distilled water, after fully dissolving, adjust the pH value of germanium solution with sodium hydroxide to be 7.0;

[0056] (3) Add the germanium solution into the dry yeast sieved in step (1) according to the ratio of 60ml germanium solution: 1000g dry yeast;

[0057] (4) The dry yeast added with the germanium solution in step (3) is expanded with an extrusion blasting machine SPJ-40, and the expansion conditions are:

[0058] Expansion temperature: 140°C

[0059] Feed rate: 300g / min

[0060] Screw speed: 30Hz

[0061] Water supply: 80g / 100g dry yeast

[0062] (5) The yeast after puffing is washed three times with pure water, and centrifuged at 3500r / min for 15min;

[0063] (6) After wash...

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Abstract

The invention discloses germanium-enriched yeast and a preparation method thereof. The germanium-enriched yeast is characterized by adding inorganic germanium solution in the process of crushing the wall of dried yeast by extrusion swelling by using an extrusion spray exploding machine and chelating the inorganic germanium solution with the yeast content to prepare the germanium-enriched yeast. The invention is simple in technology, convenient in operation, good in continuity, large in treatment capacity and easy to realize industrialization. The obtained yeast is high in content of organic germanium, stable in quality, safe and basically invariant in active components. The invention can be applied to comprehensive utilization of waste saccharomyces cerevisiae, thus changing wastes into valuables, reducing environmental pollution, increasing the added value of products and increasing the economic benefits of beer enterprises.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to a germanium-enriching method for yeast and its application. Background technique [0002] Germanium is a highly biologically active trace element. The wide range of pharmacological effects and therapeutic potential of germanium compounds are inseparable from the element germanium. The biological effects of germanium are mainly manifested in the promotion of cell growth and metabolism, immune regulation, free radical scavenging, anti-mutation, oxygen enrichment, and mutual antagonism with other elements. [0003] Since the content of germanium in natural foods is generally low, inorganic germanium is highly toxic and basically has no physiological function. Although chemically synthesized organic germanium has low toxicity, there are still many doubts about its safety in food. The biological conversion of inorganic germanium into a form similar to naturally oc...

Claims

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Application Information

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IPC IPC(8): C12N1/18C12N1/16A23L1/30C12R1/865C12R1/85A23L33/14A23L33/165
Inventor 杜冰黄继红杨公明李燕杰江东文夏雨袁根良
Owner SOUTH CHINA AGRI UNIV
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