What does VC do? What does VC do

Are you talking about c I also just learned, mainly for. .NET development.

VC stands for vinylene carbonate, which is a refractory metal compound, which can improve the toughness of the material by adding an appropriate amount in the powder metallurgy production of cemented carbide. The addition of VC to the lithium-ion electrolyte can improve the film-forming characteristics of the negative electrode SEI film and improve the cycling performance of the battery.

In addition to being the main component in the alloy, VC is often added to the alloy as an additive component, and its main functions are: to reduce the sensitivity of the alloy properties to the sintering temperature and time, or to increase the range of sintering temperature and time that the alloy magnetic force (HC) and hardness (HRA) are qualified, and to inhibit the growth of carbide grains during sintering; Changing the phase composition and improving the heat resistance of the alloy can make the two-phase region of the WC-CO alloy widen and reduce the sensitivity of carbon to the effect of the alloy properties. Improve the wear of alloy crescent craters, reduce knife tumors, improve chip breaking performance, etc.

When VC is added as an additive component in the alloy, the amount of VC added should be different depending on the composition of different matrix alloys, due to the existence of VC, the compressibility performance of the alloy powder can be reduced, and with the increase of VC content, the density of the blank has a downward trend.

Another role of VC in alloys is in the form of inhibitors, which effectively prevent the growth of WC grains during the sintering process. Among the many inhibitors (CR3C2, NBC, TAC) in powder metallurgy, VC has the best inhibition effect.

1. Function: 1. Promote the biosynthesis of collagen. It is conducive to faster healing of tissue wounds.

2. Promote the metabolism of tyrosine and tryptophan in amino acids and prolong the life of the body.

3. Improve the utilization of iron, calcium and folic acid.

4. Improve the metabolism of fats and lipids, especially cholesterol, and prevent cardiovascular diseases.

5. Promote the growth of teeth and bones, and prevent gum bleeding.

6. Enhance the body's anti-stress ability and immunity to the external environment.

2. About VC

1. The structure of vitamin C is similar to glucose, it is a polyhydroxyl compound, and the two adjacent enol-type hydroxyl groups in the 2nd and 3rd positions of its molecule are easy to dissociate and release H+, so it has the nature of acid, also known as ascorbic acid. Vitamin C has strong reducing property and is easily oxidized to dehydrovitamin C, but its reaction is reversible, and ascorbic acid and dehydroascorbic acid have the same physiological function, but if dehydroascorbic acid continues to oxidize to form diketogulic acid, the reaction is irreversible and completely loses physiological efficacy.

2. Composition structure:

1) Vitamin C is an acidic polyhydroxyl compound containing 6 carbon atoms, the molecular formula is C6H8O6, and the molecular weight is:

2) There are two types of naturally occurring ascorbic acid, L type and D type, the latter of which is not biologically active. Vitamin C is a colorless and odorless flake crystal that is easily soluble in water and insoluble in organic solvents. It is stable in an acidic environment, and can promote oxidative damage when it encounters oxygen, heat, light, and alkaline substances in the air, especially in the presence of oxidase and trace copper, iron and other metal ions.

Oxidase is generally more abundant in vegetables, so vegetables are lost to varying degrees during storage. However, the bioflavonoids contained in some fruits can protect their stability.

3. The effect of vitamin C on plants.

1) Vitamin C is an antioxidant that helps plants resist drought, ozone and UV rays. Vitamin C protects plants from harmful *** in photosynthesis.

2) Vitamin C can resist scurbemia, so it is also called ascorbic acid. It is an important vitamin widely found in fresh fruits, vegetables and many organisms, and as a highly active substance, it participates in many metabolic processes. In recent years, in the research of free radical damage theories such as plant aging and abandonment, vitamin C, as one of the members of the corresponding protection system against free radical damage in living organisms, has attracted people's research interest.

Therefore, the determination of its content can be used as an important physiological index of anti-aging and anti-stress, and is of great significance for identifying the quality of fruit trees and selecting and breeding good varieties.

Vitamin C, also known as ascorbic acid, is a water-soluble vitamin. Of all vitamins, vitamin C is the most unstable. It is easy to be destroyed during storage, processing and cooking. It is also susceptible to oxidation and decomposition.

1. The main physiological functions of vitamin C.

1. Promote the biosynthesis of collagen. It is conducive to faster healing of tissue wounds.

2. Promote the metabolism of tyrosine and tryptophan in amino acids and prolong the life of the body.

3. Improve the utilization of iron, calcium and folic acid.

4. Improve the metabolism of fats and lipids, especially cholesterol, and prevent cardiovascular diseases.

5. Promote the growth of teeth and bones, and prevent gum bleeding.

6. Enhance the body's anti-stress ability and immunity to the external environment.

2. When vitamin C is deficient, its symptoms are:

1 Swollen and bleeding gums, ulcerated gums, loose teeth.

2. Skeletal deformity and easy fracture.

3. Wounds that are difficult to heal, etc. In addition, it causes scurvy and anemia.

4 Massive bleeding and heart failure, and in severe cases, there is a risk of sudden death.

5 Decline of muscle fibers, including myocardial decline.

Vitamin C, also known as ascorbic acid, is a water-soluble vitamin. Of all vitamins, vitamin C is the most unstable. It is easy to be destroyed during storage, processing and cooking. It is also susceptible to oxidation and decomposition.

Promotes collagen biosynthesis. It is conducive to faster healing of tissue wounds.

Promote the metabolism of tyrosine and tryptophan in amino acids and prolong the life of the body.

Improve the metabolism of fats and lipids, especially cholesterol, and prevent cardiovascular diseases.

Promotes the growth of teeth and bones and prevents gum bleeding.

Vitamin C is taken together with soy isoflavones, collagen, and propolis, which is effective for beauty and skin care.

English Name] Vitamin C, Ascorbic Acid 【Basic Knowledge】 Vitamin C, also known as ascorbic acid, is a water-soluble vitamin.

Of all vitamins, vitamin C is the most unstable. It is easy to be destroyed during storage, processing and cooking. It is also susceptible to oxidation and decomposition.

Water solubility】 Most animals can synthesize vitamin C on their own, but humans, apes, guinea pigs, etc. must ingest it from food; Vitamin C plays an important role in the formation of collagen. Collagen is an important substance for the development and repair of tissue cells, gums, blood vessels, bones, and teeth in the human body;

Aids in the absorption of iron in the body; The unit of measurement is milligrams (mg); In times of stress, the consumption of vitamin C accelerates. Vitamin C Vitamin C participates in the redox process in the body, promotes the growth and development of the human body, enhances the body's resistance to diseases, promotes the formation of collagen in the interstitium of cells, maintains the normal function of teeth, bones, blood vessels and muscles, and enhances the detoxification ability of the liver.

When vitamin C is lacking in the human body, symptoms such as bleeding gums, loose teeth, fragile bones, easy bleeding from mucous membranes and subcutaneous skin, and wounds that are not easy to heal will occur. In recent years, scientists have also discovered that vitamin C can prevent nitrite and secondary amines from combining in the stomach to form a carcinogen called deamine, thereby reducing the incidence of cancer.

VC has a whitening effect and can remove acne scars. Synthesis of collagen - to form an important matrix of cartilage, bone, tooth enamel and vascular epithelium. Fights free radicals, helps prevent cancer, lowers cholesterol, and prevents scurvy.

It also prevents sunburn and avoids the sequelae of excessive sun exposure.

VE is antioxidant.

Vitamin E has the most extensive effect in the human body, which is greater than any kind of nutrient, so it is known as the "guardian". It has good antioxidant properties in the body, i.e. reduces cell aging. Maintain the integrity of red blood cells, promote cell synthesis, anti-pollution, anti-infertility effects.

Lack of vitamin E can lead to atherosclerosis, blood anemia, cancer, cataract and other senile leg disease; Scarring is formed; It can make teeth yellow; Causes myopia; causes disability and mental retardation; Causes low sexual function in men; Enlarged prostate and so on.

Vitamin E is generally non-toxic. When taken in high doses (more than 1,200 IU per day), it can cause nausea, flatulence, diarrhea and the adverse effects of a pounding heart.

Increases elasticity, anti-fatigue, increases physical strength, promotes wound healing, enhances resistance, ascorbic acid, prevents pigmentation, helps iron absorption.

Vitamin C is a well-known vitamin"Stars"。Women love its whitening and pigmentation prevention functions;

Middle-aged and elderly people love its antioxidant, anti-aging, and cardiovascular disease prevention functions; Teenagers also love its ability to combat colds.

Collagen accounts for one-third of the total protein in the human body, and the shape is like jelly, which acts as a means of killing hundreds of millions of cells in the human body.

Bonded together to form tissues (**, blood vessel walls, cartilage, etc.). The"Jelly"Make the human body tissue rich in elastic quilts"Jelly"The surrounding cells form protection against viral invasion. c/q~wa?m

The walls of blood vessels are made up of that"Jelly"Glued. When vitamin C is adequate,"Jelly"It is elastic, and the blood vessels are like rubber bands, stretching freely; When vitamin C is deficient,"Jelly"Losing its elasticity, the blood vessels are like glass tubes, which rupture immediately when they are stretched.

**Red moles, in most cases, are caused by a lack of vitamin C, resulting in the rupture of the microvessels under the skin, and the blood flow to the outside of the blood vessels. Brushing bleeding is also due to the lack of vitamin C, resulting in brittle blood vessels in the gums, and when the blood vessels meet the external force of the toothbrush, they break on the spot, and blood flows from the blood vessels to the mouth.

2. Increase the elasticity is also caused by"Jelly"(collagen) binds ** cells. When vitamin C is sufficient, it is as elastic as a rubber band. 3. Prevent pigmentation.

The formation of melanin goes through a series of chemical reactions, and when vitamin C is added to the reaction process, the formation of melanin can be blocked. When vitamin C is deficient, the pigment granules will gradually increase, making the ** color darker. The particles continue to increase and will form pigmented spots.

Therefore, vitamin C is sufficient to effectively prevent new dark spots. 4. Prevention of arthritis The cartilage of the joints is also made of"Jelly"(collagen). When vitamin C is deficient, cartilage loses its elasticity and is prone to wear and tear, which can easily lead to arthritis.

5. Promote wound healing The scab that makes the wound heal is the role of vitamin C and collagen. When vitamin C is deficient, the ability to scab is weakened and wound healing is slow. Therefore, surgical patients must consume a lot of vitamin C.

6. Enhance immunity When bacteria and viruses invade the human body, they are eliminated"Aggressor"The protagonists are white blood cells. Vitamin C strengthens white blood cells"Combat capabilities"This view has long been confirmed by the medical community. When vitamin C is sufficient, it can prevent and treat various infectious diseases, such as infection, pneumonia, tuberculosis, prostatitis, hepatitis, etc.

It is believed in the literature that high doses of vitamin C** have significant effects on colds; It can also significantly reduce high blood pressure.