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A method for producing starch-zinc complex nutritional enhancer by using pulsed electric field

A nutrient enhancer and pulse electric field technology, applied in the field of modified starch, can solve the problems of long reaction time between starch and metal, high cost of enzymatic degradation, and easy falling off of zinc ions, so as to improve the efficiency of coordination reaction and reduce the activation energy of reaction , The effect of shortening the preparation time

Active Publication Date: 2019-10-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Zinc ions are easy to fall off during use;
[0008] (2) The cost of enzymatic degradation method is high, and process condition is complicated;
[0009] (3) The reaction time between starch and metal is long and the efficiency is low;
[0011] (5) This method has not been found to prepare slow-digestible starch

Method used

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  • A method for producing starch-zinc complex nutritional enhancer by using pulsed electric field
  • A method for producing starch-zinc complex nutritional enhancer by using pulsed electric field
  • A method for producing starch-zinc complex nutritional enhancer by using pulsed electric field

Examples

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Effect test

Embodiment 1

[0040] Rice starch and 0.02mol / L zinc acetate solution were configured as an emulsion with a concentration of 30% (w / v), mixed for 3 minutes, adjusted to pH 6.5 with sodium hydroxide solution, and chlorinated with 0.2mol / L Sodium adjusted the conductivity of the above solution to 0.5mS / cm, and then treated it with a pulsed electric field for 0.5 hours, wherein the pulsed electric field intensity was 4.0kV / cm, the pulse width was 40μs, and the flow rate was 100L / h, and it was washed with deionized water for several times until There is no free zinc, and finally washed with absolute ethanol, suction filtered, dried in an oven at 40°C, and then ground and dried at 80 mesh to obtain a starch-zinc complex nutrition enhancer with a zinc content of 140mg / g. The conversion rate was 40%, and the SDS was 57%, the data is shown in figure 1 , figure 1 Under the above conditions, the content of slowly digestible starch (SDS) in starch complexes under different pulse electric field intensi...

Embodiment 2

[0042] Potato starch and 2.0 mol / L zinc acetate solution were configured as an emulsion with a concentration of 10% (w / v), mixed for 3 minutes, adjusted to pH 7.0 with sodium hydroxide solution, and chlorinated with 0.3 mol / L Sodium adjusted the conductivity of the above solution to 1.0mS / cm, and then treated it with a pulsed electric field for 1.5 hours, wherein the pulsed electric field intensity was 6.0kV / cm, the pulse width was 40μs, and the flow rate was 200L / h, and it was washed with deionized water several times until There is no free zinc, finally washed with absolute ethanol, suction filtered, dried in an oven at 40°C, and then ground and dried at 60 mesh to obtain a starch-zinc complex nutrition enhancer with a zinc content of 220mg / g. The conversion rate is 78%, and the SDS is 60%, the data can be found in image 3 , image 3 Under the above conditions, the zinc content and conversion rate in the starch complex under different pulse electric field intensities.

Embodiment 3

[0044] Cornstarch and 2.0mol / L zinc acetate solution were configured as an emulsion with a concentration of 8% (w / v), mixed for 3 minutes, adjusted to pH 8.0 with sodium hydroxide solution, and chlorinated with 0.3mol / L Sodium adjusted the conductivity of the above solution to 2.0mS / cm, and then treated it with a pulsed electric field for 2.5 hours, wherein the pulsed electric field intensity was 6.0kV / cm, the pulse width was 40μs, and the flow rate was 100L / h, and it was washed with deionized water for several times until No free zinc exists, finally washed with absolute ethanol, suction filtered, dried in an oven at 40°C, then ground and dried at 80 mesh to obtain a starch-zinc complex nutritional enhancer with a zinc content of 230mg / g. The conversion rate is 80%, and the SDS is 62%, the data can be found in Figure 4 ,in Figure 4 Under the above conditions, the zinc content and conversion rate in the starch complex after different pulse electric field treatment times.

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Abstract

The invention discloses a method for producing a nutrient supplement namely a starch zinc complex compound through pulsed electric fields. The method comprises the following steps of (1) weighing starch raw materials, preparing the weighed starch raw materials and a zinc acetate salt solution into an emulsion of which the concentration is 5-30%w / v, and adjusting pH to 6-8; (2) adjusting the electrical conductivity of the emulsion obtained in the step (1) to 0.02-4.0mS / cm; (3) pumping the suspension treated in the step (2) into a pulsed electric field treatment room for pulse treatment, and guaranteeing the steady flow of the suspension; and (4) performing washing on the suspension treated in the step (3), performing drying, performing crushing, and performing screening so as to obtain the treated starch zinc complex compound. According to the method disclosed by the invention, the content and the conversion rate of metal in the starch zinc complex compound are increased, and besides, the content of slowly digestible starch in the complex compound is increased. The operation is simple, the treatment time is short, the cost is low, and the energy consumption is low.

Description

technical field [0001] The invention relates to a method for modifying starch, in particular to a method for producing a starch-zinc complex nutrition enhancer by using a pulse electric field. Background technique [0002] At present, more than 20 kinds of trace elements such as iodine, iron, copper, zinc, selenium, cobalt, chromium, manganese, etc. have been found and are necessary for the human body. The process aspect plays a very important role, and the lack of trace elements seriously affects human health. Zinc can promote growth and development, maintain normal sense of taste, smell, vision, participate in the regulation of the body's immune function, and accelerate the regeneration of wounded tissues. Zinc deficiency can cause loss of appetite, growth retardation, and stunted growth. Insufficient intake of zinc in children can lead to Developmental stagnation, mental retardation, and modern science has confirmed that the incidence of coronary heart disease is positiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L29/219A23L5/30
Inventor 韩忠曾新安洪静
Owner SOUTH CHINA UNIV OF TECH
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