#头条创作挑战赛#
Although we talk less about poison in life
But in fact there is poison
Much more common than we think
First, let's talk about the classification of poisons
Poisons are broadly divided into two types
Biological and chemical poisons
The former is a chemical substance
Such as drugs, industrial poisons, military poisons, etc
The latter is further divided into animal poisons
Snake venom, puffer fish venom, etc
Its main components are proteins, alkaloids and other substances
and plant-based poisons
Such as bitter almonds, poisonous mushrooms, etc
In addition, poisons can be classified from different perspectives
There are tens of thousands of known poisons in the world
There are more than 10,000 poisons on the market alone
The concept of poison is relative
Whether a substance is toxic or not is related to the dose it enters the body
Some substances are drugs in small doses
In large doses, it is poisonous
For example, water is a nutrient that we can't live without
But a large amount of water enters the body for a short time
can cause water poisoning
Whether poisoning occurs after the poison enters the body
Depends on a variety of factors
Such as the toxicity and characteristics of poisons
The amount and time it enters the body
Individual differences in patients
Such as sensitivity and tolerance to poisons
Is the poison no longer poisonous or more poisonous after it expires?
Different types of poisons have different states after they expire
Biological poisons
In the case of strong acids, strong alkalis and high temperatures, etc
It loses its toxicity due to denaturation
After a long period of placement
Toxicity also decreases gradually
And chemical poisons
is synthetic
in its natural environment
It is not easy to deteriorate
Therefore, the efficacy of the drug is basically not affected
Even part of the poison after a long time of place
New chemicals are also produced
Resulting in more intense toxicity
The most common chemical poisons are pesticides
Although most of the pesticides nowadays are after their expiration date
The toxicity will gradually decrease
Some in case of improper preservation
It can also lead to a reduction in toxicity
Because most of the pesticides are used to prevent residues on the food
Toxicity decomposes gradually over time
But this reduction in toxicity is only for the insecticidal effect
And for the human body
It is still very toxic
Especially when it has just decomposed in water
and even its volatile gases
All have insecticidal effects
But there are exceptions
Arsenic trioxide, for example, is relatively stable
This name may not be familiar to you
I'll change the name, and you'll see
- Arsenic, crane top red
They do not deteriorate easily in the air
However, it will be slowly oxidized in an acidic environment
Arsenite is also formed when alkaline is encountered
It is also a toxic arsenic compound
But poison is also a double-edged sword
Some poisons can also be used to process food
For example, sulfur dioxide
Everyone has probably heard the same sentence
"Toxicity aside from the dose is a hooligan"
For sulfur dioxide
Although it is classified as a toxic substance
But in fact trace amounts of sulfur dioxide
It can be metabolized by the human body
If you can grasp the dosage
It can be done without harming the human body
Keep food fresh and bleached
Therefore, sulfur dioxide is recognized both at home and abroad
It is usually added to food in the form of sulfites
As a preservative and antioxidant
It's not just food
Even paper towels and other daily necessities
have their uses
But according to the regulations
Foods that use sulphur dioxide or sulfites
Must be indicated in the ingredient list
There is strict control over the dosage
However, there are some unscrupulous merchants
Buy sulphur dioxide yourself
And in the case of ignoring the dosage
Excessive use of sulphur dioxide
This results in excessive residue
This is indeed a danger to human health
In short, it doesn't matter if the poison is expired or overused
It is strictly forbidden to take them
There are pesticides at home
Keep out of reach of infants and toddlers
Prevent accidental ingestion
Okay, let's talk about it today
And what are the brain-opening questions
Feel free to ask questions in the comment area