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Method for preparing oil rich in saturated and unsaturated fatty acids by using Penicillium ascidianum asc2-4

A technology of unsaturated fatty acid and sea squirt orange, applied in the field of biological extraction, can solve the problem of high content

Active Publication Date: 2021-06-25
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oil prepared by this method is only rich in unsaturated fatty acid oil, and the content of unsaturated fatty acid gamma-linolenic acid oil in the obtained oil is relatively high

Method used

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  • Method for preparing oil rich in saturated and unsaturated fatty acids by using Penicillium ascidianum asc2-4
  • Method for preparing oil rich in saturated and unsaturated fatty acids by using Penicillium ascidianum asc2-4
  • Method for preparing oil rich in saturated and unsaturated fatty acids by using Penicillium ascidianum asc2-4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0115] A method for preparing oil rich in saturated and unsaturated fatty acids by using Penicillium citrinum Asc2-4, comprising the following steps:

[0116] S1. Inoculate Penicillium citrinum Asc2-4 into the seed medium, and culture it in a shaker at 26°C and 200rpm for 3 days; the composition of the seed medium is: potato extract powder 8g / L, glucose 20g / L, sea essence salt 15g / L, ammonium sulfate 10g / L;

[0117] S2. inoculate the cultivated seeds in the fermentation medium, and ferment for 5 days in a shaker at 26° C. to obtain the Penicillium citrinum mycelium under the condition that the liquid loading is 40% of the volume of the culture vessel and the rotating speed is 220 rpm. The composition of the fermentation medium is: glucose 100g / L, potato 200g / L, sodium citrate 0.1g / L, sea essence salt 15g / L, peptone 0.5g / L, yeast extract 0.5g / L, KH 2 PO 4 4g / L, MgSO 4 150mg / L, FeCl 3 2.0μg / L; the mass ratio of yeast extract to peptone is 1:1;

[0118] S3. Extract oil by...

Embodiment 3

[0120] A method for preparing oil rich in saturated and unsaturated fatty acids by using Penicillium citrinum Asc2-4, comprising the following steps:

[0121] S1. Inoculate Penicillium citrinum Asc2-4 into the seed medium, and culture it in a shaker at 28°C and 180rpm for 2 days; the composition of the seed medium is: potato extract powder 6g / L, glucose 18g / L, sea essence salt 13g / L, ammonium sulfate 8g / L;

[0122] S2. inoculate the cultivated seeds in the fermentation medium, and ferment for 5 days in a shaker at 28° C. to obtain the Penicillium citrinum mycelium under the condition that the liquid loading is 40% of the volume of the culture vessel and the rotating speed is 180 rpm. The composition of the fermentation medium is: glucose 50g / L, potato 150g / L, sodium citrate 0.1g / L, sea essence 10g / L, peptone 0.1g / L, yeast extract 0.1g / L, KH 2 PO 4 2g / L, MgSO 4 50mg / L, FeCl 3 2.0μg / L; the mass ratio of yeast extract to peptone is 1:1;

[0123] S3. Extract oil by acid he...

Embodiment 4

[0125] A method for preparing oil rich in saturated and unsaturated fatty acids by using Penicillium citrinum Asc2-4, comprising the following steps:

[0126] S1. Inoculate Penicillium citrinum Asc2-4 into the seed medium, and culture it in a shaker at 28°C and 180rpm for 2 days; the composition of the seed medium is: potato extract powder 6g / L, glucose 18g / L, sea essence salt 13g / L, ammonium sulfate 8g / L;

[0127] S2. Inoculate the cultivated seeds in the fermentation medium, and ferment for 3 days in a shaker at 26° C. to obtain the Penicillium citrinum mycelium under the condition that the liquid loading is 80% of the volume of the culture vessel and the rotating speed is 180 rpm. The composition of the fermentation medium is: glucose 150g / L, potato 200g / L, sodium citrate 0.5g / L, sea essence 20g / L, peptone 1.5g / L, yeast extract 1.5g / L, KH 2 PO 4 6g / L, MgSO 4 150mg / L, FeCl 3 6μg / L; the mass ratio of yeast extract to peptone is 1:1;

[0128] S3. Extract oil by acid he...

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Abstract

The invention discloses a method for preparing oil rich in saturated and unsaturated fatty acids by utilizing Penicillium citrinum Asc2‑4. In the method, Penicillium citrinum Asc2‑4 is inoculated in the seed medium for shaker culture; the cultivated seeds are inoculated in the fermentation medium, and extracted after fermenting under suitable dissolved oxygen conditions; the composition of the fermentation medium is as follows: : Carbon source, potato, sodium citrate, sea essence salt, nitrogen source, KH 2 PO 4 , MgSO 4 and FeCl 3 . The present invention optimizes the culture medium and culture conditions of Penicillium citrinum Asc2-4, and prepares oil rich in saturated and unsaturated fatty acids at the same time. The content of oleic acid and linoleic acid accounts for 25% to 27% of the total oil mass, accounting for 46% to 54% of the mass of unsaturated fatty acids can produce functional oils rich in oleic acid and linoleic acid.

Description

technical field [0001] The invention belongs to the technical field of biological extraction. More specifically, it relates to a method for preparing oil rich in both saturated and unsaturated fatty acids by using Penicillium citrinum Asc2-4. Background technique [0002] Microbial oils are oils synthesized by microorganisms such as yeast, mold, bacteria, and algae using exogenous nutrients and stored in cells. Compared with the land, the ocean has the extreme characteristics of high salinity, high pressure and low oxygen, which form the unique oil production properties of marine fungi. [0003] Oleaginous fungi can generally use a variety of carbon sources to grow and accumulate oil. The type and concentration of carbon sources have an effect on the oil content and unsaturated components of oleaginous fungi. hen et al. studied that T.fermentans used pure glycerol to ferment oil production, and the biomass, oil yield and oil content were 4.0g / L, 1.4g / L and 35.0%, respecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/64C12N1/14C12R1/80
CPCC12N1/14C12P7/6409C12P7/6427
Inventor 雷晓凌罗正东聂芳红钟敏刘唤明
Owner GUANGDONG OCEAN UNIVERSITY