After eating some dry food, we continued to chat.

Dr. Liu seemed to be very good at poison, and he talked happily.

"There are also some more common poisons, such as cationic cleaners, which are found in all kinds of medical, household and other cleaning agents, which are generally diluted to non-lethal doses, but are harmful to the elderly, children and the infirm...... Toxicity is grade 4 (very toxic) and is liquid in nature and can be absorbed by mouth or skin...... Symptoms are mainly destruction of tissues, damage to mucous membranes, dizziness, nausea, vomiting, hypotension, convulsions, coma, death...... But there are no obvious signs on the death report. The onset usually lasts from 10 minutes to 1 hour, and death occurs within 1-4 hours! The detoxification is done by circulating air, inducing vomiting, and neutralizing it with milk, activated carbon or plain soap before being absorbed by the tissues! Dr. Liu continued.

"Doctor, how do you remember so much knowledge?" I was amazed.

"Remember! In those hard training days, in addition to physical training such as fighting, I also have to memorize these professional knowledge every day! Not only to memorize, but also to learn and apply! Dr. Liu exclaimed.

"Then there's isopropyl alcohol, which is contained in alcohol, lotions, and can also be toxic in excess of alcoholic beverages, which is liquid at room temperature, but easily volatilized into a gas that can be swallowed or absorbed by the skin...... The symptoms are inhibition of the central nervous system leading to coma, and in severe cases, vomiting, decreased breathing, vomiting blood, excessive sweating, edema, and internal bleeding! The duration of the attack is usually 10-30 minutes, and food will delay the seizure. The methods of detoxification are: artificial respiration, gastric lavage, intravenous fluids...... It is important to note here that isopropyl alcohol has twice the negative effects of general alcoholism. Usually when you use alcohol to cool down, it can cause poisoning! Dr. Liu exclaimed.

"And then there's methanol – which is used in a lot in industry and is the culprit in the counterfeit wine case! A lot of people will drink fake wine, Gao Yue, you often see the news or hear some friends say that they have drunk fake bars! These companies that make fake wine are adding methanol! Its toxicity is grade 5 (extremely toxic), its nature is liquid at room temperature, volatile, and can be absorbed orally or by the skin. Symptoms after poisoning are damage to the liver, kidneys, heart, brain swelling, blindness, headache, vomiting, nausea, dilated pupils, coma in the chest, rapid drop in blood pressure, respiratory arrest and death. I've seen several people who died of methanol poisoning, and their bodies had their eyes destroyed...... "Dr. Liu said.

"yes...... I've heard before that some of my friends who have drunk fake wine have damaged their eyes, and some of them are even blind! It turns out that methanol is so harmful! I said out loud.

"Yes, so when you drink, you must smell it first, observe the color of the wine before drinking, and don't drink fake wine! After poisoning, the general incubation period is 12-48 hours, which is very troublesome! The method of detoxification: use of emetic within 2 hours, gastric lavage, and then oral or injection of ethanol. Physician Liu said.

"Another well-known is potassium permanganate, which is used in large quantities in aquariums and hospitals, as well as in school laboratories. The toxicity is level 5 (extremely toxic), and it is purple crystals in nature that are soluble and therefore can kill the person taking a bath. The symptoms of poisoning are corrosion and destruction of mucous membranes, severe burns, edema, failure of internal organs, bleeding, perforations, purple spots on the skin, which can easily lead to miscarriage. Attacks usually last 5 to 10 minutes. The way to detoxify is cleansing, surgical repair! I've come across a case of killing people with potassium permanganate in a bathtub before, it's horrible! That day, when I arrived at the scene, the corpse was already highly corroded, the smell was terrible, and several of the people from the criminal police team vomited...... The scene is unbelievable! Physician Liu said.

"Oh my God, so many cases...... Those who poisoned were very knowledgeable...... In fact, these criminals have quite high IQs...... "I sighed.

"Yes, but ...... It's often a lot of secrets!! I always find something suspicious! Dr. Liu replied confidently.

I admired Dr. Liu more and more, and quickly asked him to tell him about the case just now.

Doctor Liu was unhurried and said that he would finish the knowledge of poison first.

"The most elegant poison is actually a plant! Do you know? Before the 19th century, more than 90% of poisoning cases were related to plants, but after the 19th century, the proportion dropped to 7%, mainly due to the rise of synthetic poisons. Because, since ancient times, the use of plants for poisoning has been considered an elegant way. There are mainly these types of plant poisoning: first, the rapid and lethal kind, there are Barbados nuts, jatropha nuts, medicinal fruits, laxative fruits...... These are toxic up to level 6 (highly toxic)! The nature of these plants is 15 feet tall, with lush foliage, yellow mucus, and small, hairy flowers...... The symptoms of poisoning are: dyspnea, sore throat, vomiting, diarrhea, drowsiness, leg cramps, the duration of the attack is usually 15-20 minutes; The only way to detoxify is gastric lavage. Note: The seeds are addictive and extremely dangerous! There is also belladonna, Barbados lily, toxicity is also level 6 (highly toxic), the plant is highly toxic, but it has a great role in medicine, mainly making atropine to stimulate the central nervous system, the flowers are dark blue-purple, and the berries are black-purple. The toxicity can be transmitted through the food chain. The main symptoms are: dilated pupils, increased heart rate, warm skin, dryness, dry mouth, loss of direction, hallucinations, decreased vision, increased sound of heartbeat, aggressive behavior, convulsions, coma, death. Attacks can last from a few hours to a few days, and the detoxification is done with mydriasis, gastric lavage, vomiting, ......," says Dr. Liu.

"There are also some highly poisonous plants, I'll give you an example, let's not talk about foreign ones, the plants that can be found in Asia, I will focus on them, such as the twin cypress, the toxicity is also level 6 (highly toxic), and all parts of it are poisonous! The symptoms of poisoning are dehydration, which makes the woman menstruate non-stop, convulsions, rotting skin blisters, gastritis, vomiting, coma, kidney failure...... Onset usually lasts from 10 hours to a few days after the breathlessness occurs. The way to detoxify is to drink milk and lavage the stomach...... There are also steppe saffron, colchicum, the toxicity is level 5 (extremely toxic), poisonous in all parts, especially bulbs, the symptoms of poisoning are burning in the throat, diarrhea, heart vascular collapse, rhapsody, sensory disorders, convulsions, muscle weakness, difficulty breathing, and even similar to arsenic poisoning, 50% of the poisoned people die! The onset time is generally 2-6 hours, death occurs within 2-3 days, and the poisoned person can stay awake until death! I have been exposed to this kind of poisoning before, and I can really stay awake, and the person who was poisoned can even solve math problems! This is also a very bizarre case, I'll tell you more about it another day! ”

"Prairie saffron, colchicum...... I've heard that after poisoning, how to solve it? I asked.

"The way to detoxify is to use activated carbon treatment, and there is gastric lavage." Dr. Liu replied.

"After being poisoned, can you still solve math problems? That's awesome, isn't it?! "I'm curious.

"yes...... It was an old professor in the mathematics department who had been poisoned by one of his students, and he was still able to go to class that afternoon after the poisoning...... At nine o'clock in the evening, it starts to fail! Dr. Liu recalled.

"What bird student? So vicious? I exclaimed.

"It seems that because the old professor failed a few courses, he had to retake them and didn't get enough credits, so he held a grudge! This kid thought that no one knew about secretly poisoning, but ...... But half a fingerprint was left at the bottom of the cup! Didn't I tell you about how to identify and extract fingerprints the other day? We relied on that half of the fingerprint to solve the case! Dr. Liu exclaimed.

"Huh? It is also narrow-minded and distorted psychology...... caused by the tragedy. I sighed.