Method for preparing polysaccharide selenium copper having bactericidal effect

A technology of polysaccharides and selenized polysaccharides, applied in botany equipment and methods, fungicides, chemicals for biological control, etc., can solve the problems of small safe dosage and toxic accumulation, and achieve low impact on the ecological environment and long-term effect Antibacterial effect, strong selective effect

Inactive Publication Date: 2017-12-12
WEIHAI WENXI BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two forms of selenium: inorganic selenium and organic selenium. Among them, the applica

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Example 1: Preparation of polysaccharide selenium copper complex

[0021] Take 100g of seaweed polysaccharide in a 10L reaction kettle, add 2L of water, stir to dissolve the polysaccharide completely, then add 80g of sodium selenite, stir evenly, add 10% citric acid solution until the pH of the reaction solution is 5.0, heat up to 70°C, and react After 4 hours, slowly add 10% GuSO at pH 5.0-7.0 4 Solution, until precipitation occurs, continue to stir at 70°C for 2 hours repeatedly. After the plate and frame filtration of the reaction solution, the filtrate was concentrated by nanofiltration to a solid content of about 10%, and spray-dried to obtain 173 g of polysaccharide selenium copper complex, which was a yellow-green powder, wherein the total sugar content was 46.2%, the selenium content was 11.0%, and the copper The content is 24.3%.

example 2

[0022] Example 2: Polysaccharide selenium copper inhibits the experiment of plant pathogenic fungus

[0023] Select apple ringworm, ginger anthracnose, jujube fruit rot and cucumber wilt, use the same concentration of copper sulfate and sodium selenite as the reference substance, and clear water as the blank control to carry out the plate antibacterial activity of polysaccharide selenium copper experiment. When the mass concentration is 0.1‰, its inhibitory effect on four plant pathogenic fungi is shown in the following table:

[0024] Pathogenic fungi

[0025] Copper sulfate, sodium selenite and polysaccharide selenium copper have all shown the inhibitory effect to these four kinds of plant pathogenic fungi, and the inhibitory effect of polysaccharide selenium copper is very obvious, is much higher than copper sulfate and sodium selenite. It shows that selenium copper sulfate has a good effect on inhibiting plant pathogenic fungi, and the effect is better than that...

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PUM

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Abstract

The invention relates to a method for preparing polysaccharide selenium copper having a bactericidal effect and belongs to the field of macromolecule complexation. Polysaccharide is co-heated with seleninic acid in a faintly acid aqueous solution to generate polysaccharide selenide; under neutral conditions, and the polysaccharide selenide and copper ions are processed through a co-heating method to prepare a polysaccharide selenium copper complex. The complex can be used as a food antimicrobial agent, a functional bio-fertilizer or a plant fungicide and have a bactericidal effect of selenium and copper, polysaccharide has effects of growth promotion, stress resistance, antivirus and property of film forming on plant surfaces, and the polysaccharide selenium copper can perform sterilization, prevent disease and promote crop growth.

Description

technical field [0001] The invention relates to a preparation method of a polysaccharide-selenium-copper complex, in particular to a preparation method of a polysaccharide-selenium-copper complex using polysaccharides, selenium and copper ions as raw materials, and belongs to the field of macromolecular complexes. Background technique [0002] As the environmental pollution caused by traditional chemical pesticides is becoming more and more serious, the target groups are gradually developing drug resistance, and the negative impact of pesticides on non-target groups, therefore, it is better to look for less impact on the ecological environment, strong selectivity, and safer for humans and animals. Biopesticides have become a hot spot in the field of pesticide research. Currently, the biopesticide products that have been successfully developed and widely used in the market are only effective against pests and diseases. They are generally safe for humans, livestock and various...

Claims

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Application Information

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IPC IPC(8): C08B37/00A01N55/02A01N43/16A01P21/00A01P3/00A23L3/3562A23L3/358C05F11/00
CPCC08B37/00A01N43/16A01N55/02A23L3/3562A23L3/358C05F11/00
Inventor 单俊伟台文静王海华郝晓晨但丽霞修玉飞
Owner WEIHAI WENXI BIOLOGICAL TECH CO LTD
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