Chapter 165 It is very important to study the preparation of various medicines carefully
Teacher Chen Feng praised: "Through everyone's answers, we can see that everyone has a certain degree of emergency awareness. Students, although we have all been genetically modified, there are still some stubborn viruses that we cannot completely eliminate."
"Although we rarely suffer from diseases such as colds, fever, cough, pneumonia, bronchitis, influenza, hand, foot and mouth disease, measles, chickenpox, rubella, scarlet fever, whooping cough, tuberculosis, otitis media, sinusitis, gastroenteritis, appendicitis, cholecystitis, myocarditis, nephritis, cystitis..." Teacher Chen Feng gave 500 examples.
"But once someone shows these symptoms, the situation can be very serious and can even be fatal. Therefore, it is crucial to carefully learn how to make various drugs, which can enable us to be prepared in emergency situations and save lives."
"Today we will study in depth the preparation of medical liquids. From basic glucose solution and normal saline to complex clindamycin phosphate injection, acyclovir injection, red poison injection, Xingnaojing injection, ambroxol injection, pantoprazole sodium injection, ligustrazine injection, thymosin injection, indomethacin injection, ganciclovir injection, ornidazole injection, gastrodin injection, breviscapine injection, famotidine injection, ginseng and wheat injection, shuxuening injection, safflower injection, astragalus injection, deer melon polypeptide injection..." The teacher gave more than 300 common examples.
"These are the more common ones. More of them will be sent to your light computers in the form of materials. I hope you will remember them carefully because they will be tested in the exam."
Reduning Injection is a good medicine that can clear away heat, detoxify, dispel wind and dredge collaterals. It is often used for high fever, slight aversion to wind and cold, headache and body pain, cough, yellow sputum and other symptoms caused by upper respiratory tract infection. Its subtlety lies in that it can effectively relieve the patient's discomfort and promote physical recovery.
After that, Teacher Chen Feng began to demonstrate the actual operation. "Let's take Reduning Injection as an example. First, prepare the necessary instruments and materials, including high-precision electronic scales, special stirring rods, sterile containers, etc." The teacher said as he skillfully picked up various instruments. His movements were smooth and flowing, as if he had already known every step by heart.
"If there is no suitable water source nearby, we can extract water from plants for distillation. For example, we can select water-rich Amethyst Cactus, Blue Dream Aloe, Brilliant Moon Agave, Starry Phoenix Fern, Spiritual Glory Calamus, Magic Light Green Radish, Green Shadow Lily, Brilliant Narcissus, Holy Begonia, and Brilliant Star Jasmine. Cut them open, collect the juice, and use a filter membrane for preliminary filtration."
Su Nian raised his hand and asked, "Teacher, in the initial filtration process, how do we determine whether the pore size of the filter membrane matches the characteristics of the juice to achieve the best filtration effect?"
Teacher Chen Feng smiled and replied: "This requires comprehensive consideration of the particle size, viscosity and characteristics of the ingredients in the juice. Generally speaking, for juices containing larger particles and higher viscosity, a filter membrane with a larger pore size should be selected to avoid clogging; while for juices with complex ingredients that require fine filtration, a filter membrane with a smaller pore size should be selected to ensure adequate filtration. At the same time, it is necessary to continuously optimize the selection through experiments and experience accumulation."
Zhao Yan then asked: "Teacher, how do you ensure the stability of temperature and pressure when the distillation apparatus is working? What impact might small fluctuations in temperature and pressure have on the distillation effect?"
The teacher patiently explained: "This requires the instrument itself to have a precise temperature control and pressure regulation system, and the relevant components must be carefully checked and calibrated in advance. Slight fluctuations in temperature and pressure may cause the purity of the distilled liquid to decrease, the content of active ingredients to be unstable, and may even cause some ingredients to decompose or deteriorate, thus affecting the quality and efficacy of the final product."
Cheng Yi also asked curiously: "What should we do if an unexpected situation occurs during the operation, such as a power outage? How can we ensure that the distillation process can be quickly resumed after the power is restored and that the product quality is not affected?"
"Not yet. Further testing and purification are needed to ensure that there are no impurities and microorganisms." The teacher answered seriously.
Zhang Kuang scratched his head: "Teacher, which of the two steps, detection and purification, is more prone to error? What is the acceptable range of error control in the detection and purification process?"
“Microscopic particle detectors and microbial analyzers are needed.”
Zhang Meng was not to be outdone: "Teacher, if you find that the purification effect is not good during the purification process, what may be the reasons? How can we reduce the risk of poor purification effect through preliminary preparations?"
The teacher said: "It may be due to damage to the purification membrane or saturation of the ion exchange column. In the early stage, we must strictly check the integrity of the purification membrane, regularly replace aging or damaged parts, and rationally plan the use frequency and regeneration cycle of the ion exchange column to reduce risks."
The students listened to the teacher's explanation attentively, nodded and took notes from time to time, and the whole class was immersed in a strong learning atmosphere.
After Teacher Chen Feng finished speaking, he began to perform more detailed operations. He first carefully poured the initially filtered plant juice into the new molecular distillation instrument, staring at the display screen on the instrument, and flexibly inputting various parameters on the operation panel with his fingers.
"Students, please watch out. We will first set the temperature to 120 degrees Celsius and adjust the pressure to 0.8 atmospheres. This number is a relatively ideal starting value obtained after many experiments, but it still needs to be fine-tuned according to the actual situation." Teacher Chen Feng explained while operating, his expression serious and focused, as if he was performing a delicate artistic creation.
As the instrument started up, a slight buzzing sound began to come from inside the distiller. In the transparent container, one could see the juice gradually churning and emitting wisps of hot steam.
"During this process, everyone should closely observe the changes in the juice and be careful not to let the temperature get too high, otherwise the effective ingredients in it will be destroyed." Teacher Chen Feng's eyes never left the distiller, and his eyes were full of caution and expectation.
After a while, water droplets began to condense on the condenser above the distiller and flowed slowly along the wall of the tube.
"This is the liquid formed by cooling the water vapor from the preliminary distillation, but it is not pure enough." Teacher Chen Feng picked up a clean container and collected the liquid.
Then, he poured the collected liquid into a device equipped with multiple layers of purification membranes. "These multiple layers of purification membranes can further filter out tiny impurities and residual harmful substances."
After this step, Teacher Chen Feng passed the liquid through an ion exchange column. "The ion exchange column can remove charged particles from the liquid, making the water purer."
After a series of complicated operations, we finally got a bottle of clear and transparent distilled water without any impurities.