① Material density influence: steel balls, cast iron balls, alloy steel balls, etc. Different materials have different densities. The density of valve stainless steel ball steel is higher than that of cast iron, while alloy steel varies according to the density and content of the main alloy elements.

②The influence of the steel ball manufacturing method: the rolled and forged steel balls have a dense structure, so the density is high, and the structure of the cast steel ball, cast iron ball or cast alloy ball is not very dense, and even has pores, so the density is low some.

③The influence of steel ball metallographic structure: bearing stainless steel ball martensite, austenite, bainite, ferrite and other different crystal structures have different densities, which also have an impact on crystal fineness.

④The influence of chemical composition elements: the different chemical composition contained in the finished steel ball, such as iron, carbon, chromium, manganese, sulfur, phosphorus, etc., will affect the hardness and impact wear of the steel ball to varying degrees. Generally speaking, If the chromium content is large, the steel ball has high wear resistance.

 

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Supplementing carotene is something that our body must do every day. This is because when there is insufficient carotene in our body, our skin will become very rough, and the collagen in the body will be oxidized faster because Carotene has strong reducing properties and can prevent the collagen in the human body from being oxidized by free radicals.

What foods contain carotene

Many people mistakenly believe that only carrots are rich in carotene. In fact, in addition to carrots, there are other radish varieties that are also rich in carotene, such as white radish. As the saying goes, eating radish in winter matches ginseng, which shows that eating radish in winter is beneficial to the human body. Researchers pointed out that white radish contains protein, fat and rich calcium. In addition, it is also rich in vitamins and minerals. When eaten raw, its spicy ingredients can promote gastric juice secretion, thereby effectively adjusting gastrointestinal function.

carotene

The carotene contained in green radish is not as high as carrot and white radish, but the amylase, protein, potassium and other minerals contained in it are not comparable to other radish varieties. Chinese medicine pointed out that regular consumption of green radish has the effects of invigorating the spleen, reducing phlegm, diuresis, digestion, and dry mouth and tongue.

In addition to the rich carotene in these radishes, there are also dark green or red-yellow vegetables and fruits, such as broccoli, spinach, water spinach, sweet potatoes, mangoes, cantaloupe, apricots and melons. Generally speaking, the more Fruits or vegetables with strong colors have more β-carotene.

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1. Foods rich in carotene

Foods rich in carotene are carrots. Carrots are a kind of green food. Other vegetables and fruits are also rich in carotene. Especially some yellow, red, green and dark vegetables are rich in carotene. It is recommended that you eat broccoli, spinach, lettuce, sweet potatoes, rape, pumpkin and other foods in your daily life. Carotene manufacturers

Fruits can properly eat some mangoes, citrus, persimmons and other fruits. Such vegetables and fruits are rich in carotene. The carotene in animal foods is not particularly high, but you can also eat some milk appropriately. Products, appropriate to eat some egg foods, you can also eat some fish foods, which are rich in a small amount of carotene.

　　 2. Benefits of supplementing carotene

Carrot manufacturers

　　 The most effective benefit of daily supplementation of vitamins required by the body is that it can achieve the health benefits of a visual system, which can greatly reduce the chance of night blindness, and it can also effectively reduce the damage to the eyes caused by strong light.

At the same time, carotene can improve the activity of red blood cells in the body, remove excessive free radicals in the body, and delay the process of aging. Everyone can achieve a good carotene supplement by eating vegetables daily.

　　 3. The human body's daily carotene requirement

Although supplementing the carotene needed in the body has many benefits for the human body, it should not be supplemented in excess, otherwise it may bring a counterproductive effect to oneself. For the average person, supplementing 100 international units of carotene per day can be To maintain the normal operation of life activities, adults can achieve a good supplement effect by eating half a lemon or 1/2 carrot a day.

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We know how important it is to replenish vitamins in the body, but it is also necessary to add vitamins to skin care products. After modern technology and research and development, the role of vitamins in the skin is already in the eye. Let us take a look.

1. Vitamin B is added to skin care products and is divided into B3 and B5. Vitamin B3 is the nicotinamide we often hear. Its biggest effect is to inhibit the transfer of melanin to protein cells and reduce pigmentation. It can also help protein synthesis and enhance skin's water content. B5 is a commonly known Ubiquinol, commonly used in moisturizing products, as well as in antioxidant products.

2. Vitamin A is generally used in skin care products in three categories, vitamin A acid, A alcohol, A aldehyde and A ester. First, although vitamin A acid is the most powerful one, it is very irritating and sensitive. Sex is difficult to use in skin care products, generally used for medicinal purposes; while A alcohol is very effective in wrinkle removal and exfoliation, but it is easy to irritate the skin at higher concentrations and cannot be used together with whitening ingredients; Aldehyde is the closest component to A acid, and has good effects on acne and anti-aging. A ester is a very common ingredient in skin care products. Our common Estee Lauder's small brown bottle and L'Occitane's Helichrysum series. It contains this ingredient and is very effective against wrinkles.

3. We all know that the role of vitamin C is whitening, but in fact, the earliest vitamin C was developed to be anti-aging, because vitamin C has a good antioxidant effect, can help collagen production, and adds high concentration. Vitamin C products can reduce the oxidation of the skin.

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Astaxanthin is a carotenoid naturally found in shrimp, lobster, crab and squid. Because of its superior antioxidant properties, it is called the “king of carotenoids”. Among all animals, astaxanthin is the highest concentration found in the muscles of salmon, and scientists have concluded that astaxanthin helps to provide endurance to these animals that need to be countercurrent. For humans, the efficacy of astaxanthin is mainly concentrated on its strong antioxidant properties, and it has greatly improved the series of diseases caused by oxidative stress, such as diabetes and cerebral infarction. Compared to other antioxidants such as beta-carotene, zeaxanthin, vitamin E and selenium, astaxanthin never becomes an oxidant in the body.

Even for healthy people, astaxanthin can be taken as a health supplement for a long time, for the following reasons:
1. Astaxanthin can help relieve pain and inflammation
Astaxanthin is a potent anti-inflammatory and analgesic that reduces the inflammatory compounds of many chronic diseases. Although this is 100% natural, astaxanthin is like some prescription painkillers, without the risk of addiction, and does not produce gastrointestinal bleeding and heartburn. More specifically, astaxanthin's COX-2 (cyclooxygenase-2), like Celebrex, has a significant effect on reducing the pain caused by osteoarthritis, rheumatoid arthritis, acute pain and dysmenorrhea. .
Natural astaxanthin can not only affect the COX-2 pathway, but also inhibit serum nitric oxide, interleukin-1B, prostaglandin E2, C-reactive protein (CRP) and tumor necrosis factor-α (TNF-α), all of which have been prove. Natural astaxanthin has been found to reduce CRP levels by more than 20% in 8 weeks, and no prescription drug can do this. CRP levels are a key indicator of heart disease.

2. Astaxanthin helps fight fatigue
Astaxanthin can make people recover from sports injuries more quickly. Pure natural astaxanthin helps muscle recovery, better endurance, enhance physical strength and increase energy levels.

3. Astaxanthin is good for eye health
Astaxanthin can pass through many obstacles and act on the retina. Numerous clinical trials have shown that astaxanthin contributes to diabetic retinopathy, macular degeneration, eye fatigue and the like.

4. Astaxanthin cleans cells
Astaxanthin filters into every cell in the body. Its unique molecular lipophilicity and hydrophilicity allow it to span the entire cell, and when the astaxanthin molecule protects one end of the fat-soluble portion of the cell and protects the water-soluble portion of the cell simultaneously, you might think it is giving it to your cell. A full body hug!
A 2007 study analyzed several commonly used antioxidants and antioxidant capacity. The study found that astaxanthin is 6000 times stronger than vitamin C, 800 times stronger than coenzyme Q10, 550 times stronger than catechin in green tea, and 75 times stronger than lipoic acid.

5. Nourish skin and sun protection
Astaxanthin has been proven to protect the body's largest organs. Astaxanthin is excellent in improving the moisture content, smoothness, elasticity and reducing fine wrinkles and freckles of the skin. A trace amount of astaxanthin can absorb a lot of ultraviolet rays, like the most perfect natural sunscreen on the earth, like a natural anti-parasol covering the whole body, which can effectively prevent ultraviolet radiation, quench the free radicals caused by ultraviolet rays, and reduce ultraviolet rays on the skin. s damage.
Nowadays, astaxanthin is widely used in the field of beauty and skin care products. Assorted cosmetics brands in the world have added astaxanthin as a super antioxidant.

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