What is the nature of snake venom?
Snake venom is a kind of toxic proteins and peptides secreted by poisonous snakes, which contains a variety of enzymes, and it is also a substance that causes toxic reactions after poisonous snakes bite people. Fresh snake venom is a slightly fishy egg white-like sticky liquid, yellow, light yellow, green, or even colorless. It is neutral or weakly acidic when fresh, and can become alkaline after a little longer, with a water content of 50%-75% and a specific gravity of 1.030-1.080. Fresh venom is easy to produce foam when it comes into contact with air, and it is easy to deteriorate and lose its toxicity when placed at room temperature for 24 hours. The venom can be kept in refrigerator for 15 ~ 30 days and stored at 40 ℃ for a long time. Snake venom after vacuum drying or freeze-drying can be stored at room temperature for 20 ~ 30 years, but the toxicity intensity and the activity of some enzymes will decrease in different degrees, and it can still dissolve in the presence of water. The toxicity of the snake disappeared after ultraviolet radiation and heating. On the contrary, strong acids, strong bases and heavy metal salts that can denaturalize protein precipitation can destroy snake venom. Snake venom is also easy to be decomposed and destroyed by oxidants, reductants and proteolytic enzymes, thus losing its virulence. Formaldehyde treatment can also lose its toxicity, but the antigen can still be retained.
- Prev
Enema therapy in the treatment of digestive system diseases in dogs
In the diagnosis and treatment of pets, the digestive system diseases of dogs are most encountered, and a simple enema method can be used to achieve good results. The scope of application of enema therapy in ① dogs with gastroenteritis symptoms such as upper vomiting and diarrhea, faeces with blood odor and so on, can be treated by enema therapy, excluding sparse feces, emptying intestines and rectal administration directly. When dry stool and difficult defecation occur in ② dogs, enema therapy can be used to soften feces and lubricate the intestines.
- Next
Seventeen ways to make rabbit hair grow.
1, each rabbit daily with 0.5 grams of sulfur, 1 gram of silkworm sand, 1 gram of Poria cocos, 0.1 grams of trace elements, mixed with feed, generally 7-10 days in advance of shearing. 2. After 1-2 days of shearing, each rabbit was intramuscularly injected with vitamin B12250 mg for 2-3 days, or compound vitamin B1 tablets (B13 mg, B21.5 mg, B60.2 mg, racemic calcium pantothenate 2 mg per tablet) were given intramuscularly for 2-3 days.
Related
- On the eggshell is a badge full of pride. British Poultry Egg Market and Consumer observation
- British study: 72% of Britons are willing to buy native eggs raised by insects
- Guidelines for friendly egg production revised the increase of space in chicken sheds can not be forced to change feathers and lay eggs.
- Risk of delay in customs clearance Australia suspends lobster exports to China
- Pig semen-the Vector of virus Transmission (4)
- Pig semen-the Vector of virus Transmission (3)
- Five common causes of difficult control of classical swine fever in clinic and their countermeasures
- Foot-and-mouth disease is the most effective way to prevent it!
- PED is the number one killer of piglets and has to be guarded against in autumn and winter.
- What is "yellow fat pig"? Have you ever heard the pig collector talk about "yellow fat pig"?