중드 재니심지소향적지방 다시보기 1화-8화 한글 자막 완결 다운로드 중국드라마 1080P 2022
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Dec 9, 2022, 11:28:59 PM12/9/22
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중드 재니심지소향적지방 다시보기 1화-8화 한글 자막 완결 다운로드 중국드라마 1080P 2022<<
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Collagen proteins are classified into several types. A total of 28 types of collagen proteins have been discovered so far, and among them, 5 types are common in humans.[2] Depending on the type, it constitutes bone, skin, cartilage, or connective tissue [3]. Animal hides and fish scales are also made of collagen.
Collagen is generally insoluble in water, and when heated with acid or base treatment, it decomposes and turns into gelatin. Collagen and gelatin have a big difference in transparency, and since collagen is a protein capable of self-assembly, it forms a hydrogel in water. Gelatin mixed with impurities is called glue.[4]
3. Structure[edit]
It has a structure in which glycine, hydroxylysine, and hydroxyproline are repeated, and more than six types including type I, type II, and type V have been discovered.
A chain in which three types of amino acids are repeated is called an alpha chain, and a chain in which three strands of an alpha chain are wrapped is called a triple helix. In general, the complex structure of collagen is formed as these triple helices cross-link each other.
Although we do not know it well, collagen has a complex structure by self-assembly and plays a pivotal role in cell differentiation, attachment, and migration as well as a role as a structural support for living tissues. The unique chain structure made by collagen shows a nonlinear optical phenomenon called second harmonic generation. In fact, it played a huge role in the evolution of living things.
4. Misconceptions and facts[edit]
Since there are many advertisements for cosmetics or food containing collagen, it seems to be used for beauty or health food purposes. It is also used for sutures and tissue engineering scaffolds, and is also frequently used for animal cell culture in vitro.
Because collagen is a component of skin or cartilage, there is a story that eating or applying it is good for skin elasticity or bones, so many people enjoy collagen-rich foods such as chicken feet, chicken wings, crucibles, pork skin, pig's feet, etc., and are targeting collagen products. There are also many on the market. However, if you think about it generally, collagen is also a type of protein, and there is no way it can be absorbed through the skin or digestive system. Protein is usually a high molecular weight substance (molecular weight is not counted as kda for nothing), and collagen is also large in molecular size, so the skin cannot absorb it. In addition, when ingested, it is decomposed into amino acids by the action of various digestive enzymes in the digestive system, and there is no guarantee that amino acids absorbed in this way will be regenerated into collagen in the body. In other words, whether you eat collagen, soybeans, or milk, once you enter the body as protein, it is all broken down into amino acids. In addition, collagen is a major component of cartilage, various connective tissues, and intercellular matrix, and is present in more quantities than any other protein in the body. Therefore, there is no guarantee that the synthesized collagen will only go to the skin.
Even collagen has a larger molecular weight than normal protein, so it is not properly digested and absorbed by the body, and more than 90% is excreted as it is, and it cannot be considered a good protein source because it does not contain essential amino acids at all. Related articles Recently, fish collagen, which is said to have a much better absorption rate than meat collagen, is sold, but there is no guarantee that collagen from fish has a better absorption rate [5], and there is no clinical trial that actually has a better absorption rate. In fact, it's just a marketing ploy close to fraud.
Collagen is usually composed of glycine and two types of amino acids [6], so when you consume collagen, you are ingesting amino acids that are the raw material. All of the major amino acids are non-essential amino acids [7]. It is a story that the body will synthesize it on its own if it is ingested or lacking anyway. If you want to have nice skin, it is more effective to moisturize and block UV rays. If you eat about 10kg of pork rinds or pig's feet a day, your skin will feel firm and the oil will increase, making it feel like moist skin.
Collagen is generally insoluble in water, and when heated with acid or base treatment, it decomposes and turns into gelatin. Collagen and gelatin have a big difference in transparency, and since collagen is a protein capable of self-assembly, it forms a hydrogel in water. Gelatin mixed with impurities is called glue.[4]
3. Structure[edit]
It has a structure in which glycine, hydroxylysine, and hydroxyproline are repeated, and more than six types including type I, type II, and type V have been discovered.
A chain in which three types of amino acids are repeated is called an alpha chain, and a chain in which three strands of an alpha chain are wrapped is called a triple helix. In general, the complex structure of collagen is formed as these triple helices cross-link each other.
Although we do not know it well, collagen has a complex structure by self-assembly and plays a pivotal role in cell differentiation, attachment, and migration as well as a role as a structural support for living tissues. The unique chain structure made by collagen shows a nonlinear optical phenomenon called second harmonic generation. In fact, it played a huge role in the evolution of living things.
4. Misconceptions and facts[edit]
Since there are many advertisements for cosmetics or food containing collagen, it seems to be used for beauty or health food purposes. It is also used for sutures and tissue engineering scaffolds, and is also frequently used for animal cell culture in vitro.
Because collagen is a component of skin or cartilage, there is a story that eating or applying it is good for skin elasticity or bones, so many people enjoy collagen-rich foods such as chicken feet, chicken wings, crucibles, pork skin, pig's feet, etc., and are targeting collagen products. There are also many on the market. However, if you think about it generally, collagen is also a type of protein, and there is no way it can be absorbed through the skin or digestive system. Protein is usually a high molecular weight substance (molecular weight is not counted as kda for nothing), and collagen is also large in molecular size, so the skin cannot absorb it. In addition, when ingested, it is decomposed into amino acids by the action of various digestive enzymes in the digestive system, and there is no guarantee that amino acids absorbed in this way will be regenerated into collagen in the body. In other words, whether you eat collagen, soybeans, or milk, once you enter the body as protein, it is all broken down into amino acids. In addition, collagen is a major component of cartilage, various connective tissues, and intercellular matrix, and is present in more quantities than any other protein in the body. Therefore, there is no guarantee that the synthesized collagen will only go to the skin.
Even collagen has a larger molecular weight than normal protein, so it is not properly digested and absorbed by the body, and more than 90% is excreted as it is, and it cannot be considered a good protein source because it does not contain essential amino acids at all. Related articles Recently, fish collagen, which is said to have a much better absorption rate than meat collagen, is sold, but there is no guarantee that collagen from fish has a better absorption rate [5], and there is no clinical trial that actually has a better absorption rate. In fact, it's just a marketing ploy close to fraud.
Collagen is usually composed of glycine and two types of amino acids [6], so when you consume collagen, you are ingesting amino acids that are the raw material. All of the major amino acids are non-essential amino acids [7]. It is a story that the body will synthesize it on its own if it is ingested or lacking anyway. If you want to have nice skin, it is more effective to moisturize and block UV rays. If you eat about 10kg of pork rinds or pig's feet a day, your skin will feel firm and the oil will increase, making it feel like moist skin.
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