Amino acids are the basic units of proteins and are essential organic compounds in life. There are about 500 different amino acids in nature, but among the amino acids that make up the proteins of living organisms, 20 are standard amino acids, which are connected in different sequences to form proteinaceous proteins that perform various physiological functions in living organisms. Amino Acids,Taurine,L-Tyrosine, Food additives Xi'an Day Natural Inc. , https://herb.dayqc.com
Amino acids can be divided into the following categories according to their location and function in proteins
1.Essential amino acids
9 amino acids that the body cannot synthesize by itself or the synthesis speed cannot meet the needs, and must be ingest through food, including lysine, tryptophan, phenylalanine, methionine, threonine, isoleucine, leucine, valine and histidine (infants also need histidine).
2.Non-essential amino acids
The human body can synthesize by itself and does not need to obtain directly from food, including glutamic acid, aspartate, alanine, serine, glycine, proline, cysteine, etc.
3.Conditional essential amino acids
Under specific conditions (such as disease, stress), the human body's synthetic ability is reduced, and additional supplements are needed, such as arginine, glutamine, etc.
Amino acids are also widely used in the field of skin care, as skin care ingredients, they mainly have the following effects
1.Moisturizing
Some amino acids such as glycine, alanine, etc. have good hygroscopic properties, which can help the skin retain moisture and enhance its moisturizing ability.
2.Repair
Such as arginine, glutamic acid, etc. participate in the repair and regeneration process of skin cells, promoting wound healing.
3.Anti-aging
Certain amino acids have antioxidant effects that can help fight free radical damage and slow down skin aging.
4.Cleansing
Amino acid surfactants, such as sodium lauryl sarcosine, are commonly used in cleansing products for sensitive skin due to their mild, non-irritating properties.
Therefore, amino acids are not only essential for human health, but also play an important role in beauty and skin care products.
Vaccination in the summer
In the hot season, when the environment is more humid and conducive to bacterial growth, strict sterilization is essential to prevent infections. Pathogenic bacteria such as *Staphylococcus* and *Escherichia coli* are commonly found in the feathers and skin of livestock and poultry, making them a frequent source of contamination. During vaccination, especially with injections, even small pinholes can lead to infections. Therefore, it's crucial to fully sterilize syringes before use and avoid reusing needles for multiple animals. A simple and effective method is boiling, which can kill most bacterial spores if maintained for 15–30 minutes.
Heat stress significantly weakens the immune response in animals, reducing the effectiveness of vaccines. If feeding or management practices are not adjusted, this can lead to vaccine failure. To combat this, it’s important to implement cooling measures during summer. This includes adjusting feed formulas, installing powerful exhaust fans, improving ventilation, and using water curtains. In emergencies, spraying cool water on animals and providing fresh, cool drinking water can help. Adding sodium bicarbonate, ammonium chloride, and vitamins—especially vitamin C and E—to the feed can enhance their ability to cope with heat stress, ensuring better vaccine performance.
When choosing an immunization method in summer, opt for less stressful options like drinking water vaccination. It's important to note that during high temperatures, the duration of water administration should not exceed two hours, as prolonged exposure may cause the attenuated vaccine to die, leading to ineffective immunity. The water volume must also be sufficient to ensure all animals have access. Additionally, adding interleukins and protective agents to the vaccine can improve its stability and immune response. While spray vaccination causes minimal stress, it requires precise equipment performance testing to maintain effectiveness.
Timing is also critical. Summer vaccinations should ideally be conducted during cooler periods, such as early morning or on cloudy days, to reduce heat exposure. Finally, the interval between vaccinations should not be too short. Repeated immunizations can over-stress the animals, weakening their immune system and increasing disease risk. It’s recommended to keep at least five days between doses, allowing the body time to recover and respond properly. Simplifying the vaccination schedule and avoiding unnecessary multiple shots is key to maintaining health and immunity in livestock.