Rice is a symbol for many Asians, especially in countries like China and Japan. In our traditional culture, rice symbolizes wealth and a good harvest.
The origin of rice can be traced back to 8000 BC to 2000 BC in the Yangtze River Basin and Yellow River Basin region of China, when people started to grow rice. The original rice was wild, and people gradually formed rice varieties suitable for human consumption through planting and selective breeding. According to research by archaeologists, as early as 5000 BC, the Chinese had already started using pottery to cook rice.
Over time, rice cultivation techniques gradually spread to other Asian countries such as Japan, Korean Peninsula, Vietnam, Thailand, etc. The spread of rice in Europe and America was brought by early explorers and settlers. In Europe, rice is mainly used for desserts and rice dishes, while in the Americas it is used as a staple food substitute.
Now, rice has become one of the most important foods in the world, and about 500 million tons of rice are produced and consumed in the world every year.
As a staple food, rice is very nutritious. Rice contains about 75% carbohydrates, mainly starch. Protein 7%-8% (mainly rice gluten, rice gelatin and globulin), fat 1.3%-1.8%, also rich in B vitamins and a large amount of trace elements.
Taking japonica rice as an example, every 100 grams of japonica rice contains:
Protein 6.7g
Fat 0.9g
Carbohydrates 77.6g
Crude fiber 0.3g
Calcium 7mg
Phosphorus 136mg
Iron 2.3mg
Vitamin B1 0.16mg
Vitamin B2 0.05mg
Niacin 1mg
Methionine 125mg
Valine 394mg
Leucine 610mg
Isoleucine 251mg
Threonine 280mg
Phenylalanine 394mg
Tryptophan 122mg
Lysine 255mg and other nutrients.
Rice is so nutritious that it is not only our daily ration, but also famous in the skin care industry. Among them, the rice peptide has natural moisturizing, whitening, anti-wrinkle, anti-oil, anti-acne, anti-freckle and other functions, and can be widely used in cosmetics, skin beautification, and hairdressing products.
In 1986, American biologist Dr. Cohen and Italian biochemist Dr. Levi won the Nobel Prize in Medicine for their discovery of active peptides that can repair damaged diseased cells, regulate cell life cycle, repair intercellular ion metabolism channels and the comprehensive regulation and promotion of the major systems of the human body.
Rice active peptides are obtained by hydrolyzing rice protein with amylase and complex protein acid, separated and purified by ion exchange chromatography, gel chromatography, high performance liquid chromatography and mass spectrometry, and then spray-dried. Rice active peptides with a molecular weight between 100Da and 1000Da have higher scavenging abilities for DPPH free radicals and hydroxyl free radicals, up to 46.76% and 68.23% respectively.
The research results showed that rice active peptide could effectively protect HUVEC cells from oxidative damage, improve the viability of HUVEC cells, and down-regulate the expression of apoptosis factor NF-kB protein. Exhibits good oxidation activity from cellular to molecular levels.
At the same time, the combination of collagen peptide and rice peptide has a more significant inhibitory effect on tyrosinase activity than collagen peptide and rice peptide alone, which can reduce the production of melanin to a certain extent and protect cells from oxidative stress damage, indicating that the combination of collagen peptide and rice peptide has a better whitening effect and has a certain synergistic effect.
The rice peptide prepared by enzymatic hydrolysis technology has a good scavenging effect on hydroxyl free radicals, superoxide anion free radicals and DPPH free radicals. Adding rice peptide to cosmetics, when the mass ratio is 4.0 g/kg, it can effectively reduce facial wrinkles and has a good anti-aging effect when used continuously for more than 4 weeks. It will have broad application prospects in anti-aging products in the future.
Post time: Mar-02-2020