Ah Chang was a little excited, holding the bottle and asking:

"Master, then let's OEM now and start using it."

Zhou Heng shook his head, "What's the hurry, first bring the staphylococcal medium cultivated before, and let's do an experiment." ”

Xiao Liuzi turned around and ran, and after a while, he brought in a few culture mediums, which were marked with the date and the patient's name, Zhou Heng picked it up and looked at it, and nodded slightly.

Raising his eyes and looking at Ah Chang, "Mark the medium with numbers, one to four, and then put four drops of penicillin on the first medium, eight drops on the second medium, sixteen drops on the third, and no drops on the fourth medium as a control sample, and compare them before dinner." ”

Ah Chang quickly wrote in his notebook that now he has developed the habit of making experimental records, needless to say, a few people moved, marked notes, used a simple straw to absorb penicillin, and opened the lid of all the culture media and started counting.

After a while, a few people did these things according to the content of the experiment, Zhou Heng motioned for them to put things down, what should they do, but Ah Chang still did not give up, chased after Zhou Heng and asked.

"Master, isn't there any disadvantage to penicillin, now that I see this medicine, it's perfect, I really can't believe it."

Zhou Heng looked at Ah Chang, this kid is really obsessed with pharmaceuticals, but the more this is the case, the easier it is to produce results, which is why Zhou Heng took him to the test.

There are still many drug trials that need to be carried out in the future, although he can propose the direction, but he does not know the real experimental procedures, so he must find someone who is very concerned about this matter to do.

Ah Chang is the most suitable candidate, although Zhang Ergou is from a humble background and does not have much literacy, he also has a very good feeling for medicine, the two of them have cultivated well, and they will definitely be the pillars of this regard in the future.

......

In the evening, Zhou Heng treated the last patient, and then he was ready to go upstairs.

Downstairs, Desheng went to Jining, and instantly felt that there were so many patients that it seemed that he couldn't finish it, Zhou Heng shook his neck, and was about to ask Ma Lingshan if there were any patients.

Ah Chang walked up to Zhou Heng with a serious face, with an anxious look on his face, interrupting the conversation between Zhou Heng and Ma Lingshan.

"Master, go to the laboratory and take a look, there seems to be something wrong with our culture media."

When Ma Lingshan heard this, he hurriedly asked Zhou Heng to go upstairs first, and said that he would take care of the remaining patients.

Zhou Heng followed Ah Chang and the three of them upstairs, the laboratory was already brightly lit, and when he walked to the test bench, the four culture mediums were lying quietly on the test bench.

Zhou Heng was a little puzzled, looked at Ah Chang with a serious face, and quickly picked up the culture medium and held a magnifying glass to observe.

First of all, the comparison between No. 1 and No. 4 was used, and the staphylococcal growth on No. 4 was very balanced, and even the trajectory formed by the smear could be clearly seen on it.

Lifting the No. 1 medium, shaking it slightly, you can see four very obvious dots, these four positions seem to have been harvested, those cocci are all shortened, just like the wheat straw cut in the ground left some neat stubble, but it is much shorter than the surroundings.

Zhou Heng didn't use a microscope, after all, such an observation was already very intuitive.

On medium No. 2, it is completely different, all the parts that drip penicillin have completely lost the cocci, but there is no contaminated part, and the cocci does not seem to have changed.

As for medium No. 3, there were almost no cocci in it, just a side façade with one or two plaques, which survived, and the rest disappeared completely.

Zhou Hai looked at Ah Chang, "Isn't this working?" Why are you calling me in a panic? ”

Ah Chang scratched his head, "After the master left, we secretly did two more comparative tests, using the remaining drugs in the streptomycin bottle to make three sets of comparisons, only thirteen culture mediums, that is, sixteen times the amount used, this result is too amazing." ”

Zhou Heng nodded, the spirit of this experiment is worth encouraging, you must know that there is a reference to get more accurate results, Zhou Heng patted Ah Chang on the shoulder.

"Let go of the test, these penicillins can also be purified, but the cost is too great, many people can't afford to use it, we need to consider a lot of problems, both effective, but also cheap, this mainly depends on mass production, otherwise although the medicine is good, the poor can't afford to use it, or it's useless. In addition, there is no shortcut to the boring research of medicine, and it needs to be worked on. ”

Ah Chang nodded, "Master, don't worry, we already know the steps of making this potion, and we will try to make some more later, and then change the nutrient solution of the previously cultivated flora and cultivate it, I think this medicine will be continuously supplied." ”

Zhou Heng thought for a moment, and his expression became solemn.

"The process of using this medicine requires a sensitization test, and I will write it down in a moment, and the first injection of the patient needs to be sensitized, that is, on the skin of the inch ruler, the needle is pierced into the epidermis, and a liquid the size of a grain of rice is pushed in, and the observation is carried out after a quarter of an hour, and it cannot be used for those who are red and swollen."

Ah Chang's eyes widened, "Allergies? ”

Zhou Heng nodded, "As for the factors, it is difficult to explain clearly in three or two sentences, for example, if a mosquito bites you, it will bulge a big bag there, especially after you scratch it." Some children, without scratching, will have blisters around the bite, or large pimples, which is actually a kind of allergic, allergic urticaria. ”

Xiao Liuzi nodded, "My little brother was like this when he was young, the mosquito took a bite, dozens of big bubbles all over his body, watery, and looked like he was about to break, and a few of us had nothing to do with a bite of rough skin and thick meat." ”

Zhou Heng nodded, "Yes, this is allergies, and allergies caused by drugs are sometimes life-threatening, so the allergy test must be carried out, go find a syringe, and let's try it first." ”

Xiao Liuzi didn't need to go into details, he hurriedly went, Zhang Ankang was not here today, Xiao Liuzi was a little excited, and he had already prepared syringes and needles.

Zhou Heng inhaled five milliliters of penicillin, pushed out all the liquid in the syringe, and then inhaled five milliliters of saline again.

Ah Chang rubbed his chin and calculated, and seemed to understand something in his eyes.

"I understand, it is to try with a very small amount, if there is a person with allergies, maybe a little contamination can cause a rash or hives, so that we know that he is allergic, so that we can change the dressing in time, or deal with it."

Zhou Heng snapped his fingers and looked at Ah Chang approvingly.

"Ah Chang is very right, that's what it means, but when this penicillin is used, it should be used on the principle of intramuscular injection in mild cases and intravenous thrust in severe cases, and then I will tell all the doctors about the use, dosage and principles, the only pity is that the patient with tetanus has been cured and discharged, when he came, it was a staphylococcal infection, which is the best test subject."

Ah Chang shook his body, and Xiao Liuzi raised his arm and approached Zhou Heng.

"Boss, use me as a test subject, I'm willing to try."

Zhou Heng glanced at him, "Forget it, I don't want to do this, come and stretch out my hand and call Ma Lingshan, Wang Sanshun, Qu Ziping, and Liu Xiu'er up, I'll give you a try, just to see how to do it." ”

Zhang Ergou hurriedly went to run errands and called people, Xiao Liuzi looked aggrieved, "I really want to be an experimental subject." ”

Zhou Heng glanced at him, "Actually, it is more suitable to find rabbits as experimental subjects, only if it is tested on animals, it can be used on human bodies." ”

Xiao Liuzi's face was instantly happy, and he approached Zhou Heng, gritted his teeth, and knocked hard.

"Boss, seeing my front teeth, what's the difference between this and a rabbit, you just treat me as a rabbit, right?"

Zhou Heng looked at the staircase weakly, who would save him at this time.

After a while, everyone came up, and at this time it was already dark outside, and they all thought that today's class was early, and they all held their own books, and when they saw these novel things in the laboratory, they all had curious looks on their faces.

Zhou Heng beckoned, motioning for everyone to come closer.

"The new drug penicillin has been developed, and the effect of the test is not bad, but this needs to be allergic and non-allergic before it can be injected.

Xiao Liuzi hurriedly stepped forward with his arm and looked at everyone gritting their teeth and smiling.

"The boss said that animal experiments are going to be conducted, and I am now a rabbit, come and prick me!"