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Antioxidant and application thereof

An antioxidant, chlorella technology, applied in the field of glycobiology, to prevent enzymatic oxidative browning of food, a wide range of sources, and enhance the effect of anti-oxidation

Active Publication Date: 2014-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing studies have shown that the water-soluble polysaccharides of Chlorella have good anti-oxidation and anti-aging effects, but there is no report on the polysaccharides in the residual algae residue after oil production of Chlorella

Method used

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  • Antioxidant and application thereof
  • Antioxidant and application thereof
  • Antioxidant and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 plant cell antioxidant experiment one

[0027] (1) Plant seed soaking experiment: using wheat Xinong "9871" for antioxidant experiment:

[0028] a) Wrap the wheat seeds with plump seeds and uniform size in gauze respectively, and wash them with running water for 10 minutes to remove impurities on the surface of the seeds and substances that prevent germination.

[0029] b) Soak the seeds in ethanol with a mass concentration of 75% for 5 minutes to remove protein and lipids on the surface of the seeds, and at the same time disinfect the surface of the seeds to prevent mold contamination.

[0030] c) at 5, 50, 200 μg·mL -1 The chlorella algae residue polysaccharide solution and deionized water were used to soak the sterilized seeds respectively, and soaked for 10 hours at room temperature.

[0031] d) Put the swollen seeds after immersion into a petri dish with 2 layers of filter paper on the bottom for culture, put about 30 seeds in each petri dish, do thr...

Embodiment 2

[0034] Embodiment 2 plant cell antioxidant experiment two

[0035] (1) Plant spraying culture: using Arabidopsis thaliana for antioxidant experiments:

[0036] a) Arabidopsis thaliana seeds were taken out from the refrigerator at 4°C and put into a 2ml centrifuge tube and added with sterile water;

[0037] b) Then planted in the soil, covered with plastic wrap and placed in an incubator (light-to-dark ratio 12 / 12, temperature 22±2°C).

[0038] c) About 4 days germinate and uncover the film, 21 days or so can grow 2 true leaves (related to the light time), spray 3 times on 31, 33, 35 days, the concentration is 0, 5, 50, 200μg·mL -1 Test polysaccharides, take samples and conduct experiments on the 38th day.

[0039] (2) Preparation of antioxidant enzymes in Arabidopsis cells: refer to "Preparation of antioxidant enzymes in wheat cells".

[0040] (3) Determination of enzyme activity: the same operation as described in "Plant Cell Antioxidation Experiment 1".

[0041] (4) Result...

Embodiment 3

[0043] Embodiment 3 in vitro antioxidant experiment

[0044] (1) Determination of reducing power: take a certain concentration of chlorella algal residue polysaccharide solution 1mL and 1mL0.2mol L -1 Phosphate buffer solution of pH 6.6 was mixed evenly, then 1 mL of 0.1% potassium ferricyanide was added, and the solution was bathed in water at 50°C for 20 min. After the reaction was completed, it was rapidly cooled, and the reaction was terminated with 1ml of 10% TCA. Take 2ml of this reaction solution, add 2ml of distilled water and 0.8ml of 0.1% FeCl 3 Mix well, and measure the absorbance value A of the mixture at 700 nm after 10 min. Use 1ml of distilled water instead of the sample as a blank control, and use 90μg·mL -1 Vc was used as a positive control. Three parallel samples were made for each sample, and the average value was taken. A 700 The larger the value, the stronger the reducing power of the sample. Measurement results such as figure 2 Shown: figure 2 ...

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Abstract

The invention relates to an antioxidant and application thereof, and relates to application of chlorella polysaccharides in preparation of plant green pesticides and food additives. The chlorella polysaccharides are a group of polysaccharides with a molecular weight of 10.6-13.6kDa, and are prepared from water-insoluble chlorella part (algal residue) by enzymolysis, deproteinization and alcohol precipitation, and the monosaccharide is mainly composed of glucose, galactose, arabinose, fucose and rhamnose. The chlorella polysaccharides can significantly improve plant cell antioxidase (SOD, POD and CAT) (superoxide dismutase, peroxidase and catalase) and in-vitro hydroxyl free radical clearance rate, reducing power, DPPH (1,1-diphenyl-2-picrylhydrazyl radical) clearance rate and other activity, and can be used as a plant growth regulator and a natural food additive.

Description

technical field [0001] The invention relates to the research on the biological activity of polysaccharides, studies in detail the biological activity and application of a water-insoluble polysaccharide in marine algae, and belongs to the field of glycobiology. Background technique [0002] Existing research results have shown that biotic and abiotic stresses can cause stress responses in plants, such as disease resistance, cold resistance, drought resistance and oxidation resistance. Among them, the oxidation reaction in higher plants is mainly manifested in the generation of reactive oxygen species ROS (reactive oxygen species), and the main species are superoxide anion (O 2 - ), singlet oxygen ( 1 o 2 ), hydroxyl radicals (HO ), hydrogen peroxide (H 2 o 2 )Wait. These ROS in the natural state are the second messengers of plant growth and development and environmental stress, which can cause physiological effects such as cytoprotective response, seed germination, root...

Claims

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Application Information

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IPC IPC(8): A01N43/16A01P21/00C08B37/00A23L3/3562
Inventor 杜昱光陈玮刘启顺彭强孟彦羽拓亚琴
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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