Modern people's pursuit of food is no longer a simple taste. People put nutrition and health at the top of the list. The general trend is to choose fresh, high-protein, high-vitamin and high-fiber as the best choice. Nutritionists call it For the "new three high." High protein is a nutrient that maintains human organs. It usually accounts for about 30% of the diet; high vitamins can delay the aging of cells; high cellulose can help our intestinal motility and facilitate detoxification.
Protein - essential material for vitality
Proteins are important substances that make up the body's cells and tissues. Without protein, there is no life. The human body is made up of a myriad of cells, and every cell and all the important components of the body have a protein. The formation and repair of human tissue is the most important physiological function of proteins. Human cells need to be constantly updated, so a certain amount of protein must be taken every day as a "building material" to form and repair tissue. In addition to these, proteins are also making "contributions" in many areas, such as enzymes that help the various chemical reactions in the metabolism proceed smoothly, antibodies that resist the invasion of "outside enemies" to fight various bacteria and viruses, and those responsible for regulating various life activities. Many hormones are made up of proteins without exception. In short, from the elasticity of our skin to the luster of hair color; from the rhythm of the menstrual cycle to the transmission of genetic information between the mother and the child is inextricably linked with protein. Leaving protein, abundant energy and beautiful face will leave us.
There are thousands of proteins in the body, including numerous enzymes, hormones, and antibodies that humans rely on. These enzymes, hormones, and antibodies all consist of proteins. The basic unit that constitutes a protein is an amino acid. Whether we eat chicken or duck fish or broth tofu, these tiny amino acids can only be absorbed and used by the body. The combination of amino acids differs to form various types of proteins. There are an estimated 100,000 or more proteins in the human body. Therefore, the key to evaluating the nutritional value of protein depends on whether the amino acid composition and proportion of the protein is close to that of the body's own protein. The smaller the gap between the two, the amino acid and human body that the protein provides. The more you need, the closer you get to it, and the higher the nutritional value.
If we can find a protein food whose amino acid content and species are exactly the same as human protein, it is undoubtedly the best source of protein. It is a pity that we have not yet found such an "all-round master". But clever humans have long thought of the method of cracking: as long as we match protein foods containing different types of amino acids with each other, and let each of them “complement each other,†we can get sufficient protein nutrition. Therefore, as long as conditions permit, we should do our best. It may be diversified to arrange recipes.
Source of protein
Animal protein:
Livestock meat (such as pigs, cattle, sheep, etc.), poultry meat (such as chickens, ducks, geese, etc.), eggs (such as eggs, duck eggs, quail eggs, etc.), fish, shrimp, crabs, milk (milk, goat milk), Dairy products (cheese, cheese, etc.).
Best choice: eggs and milk
Reasons: The protein contained in eggs and milk is the best quality of all protein foods, the most easily digested, and the complete amino acids.
Plant protein:
Beans, dried fruits (eg sesame, walnuts, pine nuts, etc.), fungi
The best choice: soy products, fungi
Rationale: Compared to animal proteins, plant proteins contain factors that inhibit digestion and affect the absorption of proteins. But most of them are rich in protein, as much as 35%. It is very easy to be absorbed, it can also lower cholesterol, as well as anti-cancer and inhibit the growth of tumor cells, so it is a good vegetable protein food.
Protein, how much is it enough?
Protein can not be stored in the body, more than the body can not absorb. In the metabolic process, it will also produce an "amyloid protein" that will damage the normal tissues and organs, aggravate the burden on the liver and kidneys, cause adverse consequences for people with poor liver and kidney function, and increase the excretion of zinc. The result is that the body's immune system is low and may die due to protein poisoning.
Therefore, regardless of the source of protein, protein should not be eaten as a staple food but must be eaten as a food supplement. Nutrition experts advocate that the daily intake of protein should not be higher than 30% of the total calories of the day, nor should it be less than 15%.
Vitamins - "chargers" for body metabolism
Many years ago, people found that eating only polished white rice could suffer from a strange disease called "beriberi." People suffering from beriberi feel tired, arms and legs like a smash, and eventually lead to death. Later, people finally discovered that eating unpolished brown rice and fresh fruits and vegetables can cure the disease. But do not know why. Until the early 20th century, scientists finally discovered that vitamin B contained in brown rice and vitamin C contained in vegetables are the answers to the above questions. Since then, with the continuous deepening of research, people finally realized the importance of vitamins for health.
Vitamins are an essential organic compound in human metabolism. The human body is like an extremely complex chemical plant that constantly carries out various biochemical reactions. Its reaction is closely related to the catalytic action of the enzyme. Enzymes must produce activity and must have coenzymes. Many vitamins are known to be coenzymes of enzymes or constituent molecules of coenzymes. Therefore, vitamins are important substances for maintaining and regulating the normal metabolism of the body. It is believed that vitamins are present in human tissues in the form of "biologically active substances."
Medical masks are mostly made of one or more layers of nonwoven fabrics. The main production processes include meltblown, spunbond, hot air or needle punching. They are equivalent to resisting liquids, filtering particles and bacteria, and are a kind of medical protection. textile.
The medical mask is composed of a mask face and a tightening belt. The mask face is divided into inner, middle and outer layers. The inner layer is skin-friendly (general hygienic gauze or non-woven fabric), and the middle layer is an isolation filter layer (ultra-fine polypropylene Fiber melt-blown material layer), the outer layer is a special material antibacterial layer (non-woven fabric or ultra-thin polypropylene melt-blown material layer).
According to performance characteristics and scope of application, medical masks can be divided into: medical protective masks, medical surgical masks, ordinary medical masks.
1. Medical Protective Mask
Medical protective masks are suitable for the protection of airborne respiratory tract infectious diseases by medical staff and related staff. It is a close-fitting self-priming filter medical protection article with a high protection level, especially suitable for contact with airborne transmission during diagnostic activities Or worn by patients with respiratory infections transmitted by droplets at close range. It can filter the particles in the air, block droplets, blood, body fluids, secretion droplets, etc. It is a disposable product. Medical protective masks can prevent most pathogens such as bacteria and viruses. WHO recommends medical personnel to use protective masks against particles to prevent viral infections in hospital air. .
Medical protective masks comply with GB19083-2003 "Technical Requirements for Medical Protective Masks". Important technical indicators include non-oily particle filtration efficiency and airflow resistance. The specific indicators are as follows: [3]
1) Filtration efficiency: Under the condition of air flow (85 ± 2) L / min, the filtration efficiency of aerodynamic median diameter (0.24 ± 0.06) μm sodium chloride aerosol is not less than 95%, which is in accordance with N95 ( Or FFP2) and above. It can block infectious agents with a diameter of less than 5 μm transmitted by air or close contact with infectious agents transmitted by droplets.
2) Inhalation resistance: under the above flow conditions, the inhalation resistance does not exceed 343.2Pa (35mmH2O).
3) For the samples sprayed on the mask under the pressure of 10.9Kpa (80mmHg), no technical indicators such as penetration should appear on the inside of the mask.
4) The nose mask must be equipped with a nose clip, which is made of bendable plastic material and has a length> 8.5cm.
5) Synthetic blood is sprayed towards the mask sample at a pressure of 10.7kPa (80mmHg), there should be no penetration inside the mask.
2. Medical Surgical Mask
Medical surgical masks are suitable for the basic protection of medical staff or related personnel, as well as the protection against the spread of blood, body fluids and splashes during the invasive operation. The protection level is medium and has certain respiratory protection performance. It is mainly used in clean environments with a cleanliness level of less than 100,000, operating in the operating room, nursing patients with low immune function and performing body cavity puncture and other operations. Medical surgical masks can block most bacteria and some viruses, can prevent medical staff from being infected, and can also prevent the microorganisms carried by medical staff's breath from being directly discharged, posing a threat to patients undergoing surgery. Medical surgical masks require the filtration efficiency of bacteria to be above 95%. Disposable medical surgical masks should also be issued to suspicious respiratory patients to prevent the threat of infection to other hospital personnel and reduce the risk of cross-infection, but to avoid infections that are less effective than medical protective masks. .
It complies with YY0469-2004 "Technical Requirements for Medical Surgical Masks", and important technical indicators include filtration efficiency, bacterial filtration efficiency and respiratory resistance. The specific indicators are as follows:
1) Filtration efficiency: Under the condition of air flow (30 ± 2) L / min, the filtration efficiency of aerodynamic median diameter (0.24 ± 0.06) μm sodium chloride aerosol is not less than 30%.
2) Bacterial filtration efficiency: under specified conditions, the filtration efficiency of Staphylococcus aureus aerosol with an average particle diameter of (3 ± 0.3) μm is not less than 95%; the bacterial filtration rate should be ≥95%; the The filtration rate should be ≥30%.
3) Breathing resistance: Under the condition of filtration efficiency flow, the inhalation resistance does not exceed 49Pa, and the exhalation resistance does not exceed 29.4Pa. When the pressure difference △ P of gas exchange on both sides of the mask is 49Pa / cm, the gas flow rate should be ≥ 264mm / s.
4) Nose clips and mask straps: Nose clips should be provided on the mask. The nose clips are made of plastic materials and the length of the nose clip should be greater than 8.0cm. The mask band should be easy to wear and take, and the breaking strength at the connection point between each mask band and the mask body should be greater than 10N.
5) Synthetic blood penetration: After 2ml of synthetic blood is sprayed at the pressure of 16.0kPa (120mmHg) towards the outer side of the mask, no penetration should occur on the inner side of the mask.
6) Flame retardant performance: The mask material should be made of non-flammable materials, and the mask burns less than 5s after leaving the flame.
7) Residual amount of ethylene oxide: For masks sterilized by ethylene oxide, the residual amount of ethylene oxide should be less than 10μg / g.
8) Skin irritation: The primary irritation index of the mask material should be ≤0.4, and there should be no sensitization reaction.
9) Microbial indicators: total bacterial colonies ≤20CFU / g, and no coliform bacteria, Pseudomonas aeruginosa, Staphylococcus aureus, hemolytic streptococci and fungi shall be detected.
3. Ordinary medical mask
Ordinary medical masks are used to block spouts exhaled from the oral cavity and nasal cavity, and can be used for one-time hygiene care in ordinary medical environments with the lowest protection level. It is suitable for general hygiene care activities, such as sanitary cleaning, liquid distribution, cleaning bed units, etc., or the blocking or protection of particles other than pathogenic microorganisms such as pollen.
Conforms to the relevant registered product standard (YZB), generally lacks the filtration efficiency requirements for particles and bacteria, or the filtration efficiency requirements for particles and bacteria are lower than medical surgical masks and medical protective masks, only reaching 20.0% for 0.3μm diameter aerosol -25.0% protection effect, can not reach the filtration efficiency of particles and bacteria, can not effectively prevent pathogens from invading through the respiratory tract, can not be used for clinical invasive operations, nor can it protect particles and bacteria and viruses, only limited to dust particles Or aerosol plays a certain mechanical barrier.
Instructions:
1. Carefully cover the mouth and nose with a mask and fasten it to minimize the gap between the face and the mask;
2. Avoid touching the mask when using it-after touching the used mask, for example to remove or clean the mask, wash your hands with soap and water or use alcohol hand sanitizer;
3. After the mask is wet or contaminated with moisture, replace with a new clean and dry mask;
4. Do not reuse disposable masks. Disposable masks should be discarded after each use.
Medical Mask,Medical Surgical Mask,Disposable Medical Face Mask,Disposable Non Woven Mask
Guangzhou Aikangli Medical Technology Co., Ltd. , https://www.aikanli.com