The so-called radiosterilization generally refers to cobalt-60.

This thing has a horrific property, nuclear radiation.

Contains two beams of gamma rays.

Lethal.

However, it is widely used in the sterilization of food and medicine.

It has one of the biggest advantages, it is very different from the general sterilization method, it is packaged and then sterilized.

There are many ways to store food, the traditional ones are smoking, pickling, and fermentation, so as to achieve the purpose of dehydration, deoxygenation, sterilization, etc.

The cleaner the bacteria are destroyed, the longer the food will last.

Radioactive sterilization is the most thorough of all sterilization methods.

The Karma ray can easily penetrate the raw material and deeply kill all kinds of harmful bacteria inside, and there is no radioactive residue.

Generally, high-temperature sterilized foods, such as ham sausages, ham, chicken, beef, and fish, can be stored for two or three months at room temperature, and they will not deteriorate at all, even if they are very good.

However, if it is applied to radiation sterilization, it can be stored for two or three years.

If vacuum deoxygenation packaging is used, the storage time can be longer.

Like Zhang Fei beef, pickled pepper and phoenix feet, ham, canned food, potato chips, and chocolate, as long as they are large manufacturers, they are basically sterilized with cobalt-60 radioactivity.

Another advantage is that it is cold-treated sterilized.

In modern food factories, the radiation sterilization room is usually connected to the production line, sterilized, soaked, pre-cooked, and sterilized at high temperature to produce finished products and package.

After packaging, the large and small plastic bags are sealed, the cans are sealed, and then through a bridge conveyor belt, enter the radiation sterilization room, and pass through.

The purpose of sterilization is achieved.

Gamma rays can easily penetrate large and small packages, bulk, liquids, solids, and even the product itself is ignored, and directly act on all microorganisms in the entire irradiation source, destroying the ribonucleic acid, proteins and enzymes of microorganisms, thereby killing microorganisms and playing a role in disinfection and sterilization.

And after this time, the effect is huge, like Fan Yang's persimmons only have a shelf life of half a year, if you go through it, plus vacuum packaging, you can keep it for two or three years casually, and you don't need to put it in the refrigerator.

With the scientific support of modern microorganisms, it can also be very purposeful to remove specific bacteria, and there is a very mature technology in the United States, such as potatoes, soybeans, garlic, and other agricultural products, which will germinate when stored at room temperature.

Give him a specific radiation.

It can inhibit germination.

This is closely related to microorganisms, and under modern technology, it is possible to specify a certain type of bacteria to achieve a certain purpose while retaining the beneficial ingredients.

If you fool around and don't have a specific purpose, you will get the canned fruit in again, and not only the bacteria will be gone, but the vitamins and various nutrients will also kill you.

The gains outweigh the losses.

Tang Yuncheng thought for a moment: "Which aspect do you refer to?"

Fan Yang only has a superficial understanding, and is not proficient, he sincerely asked for advice, so he replied honestly: "I don't understand either, are there many aspects?"

"It is widely used, equipment, drugs, food, we mainly study food microorganisms, and we are not very familiar with pharmacology and equipment. ”

"Food-wise. Fan Yang replied.

Three men and three women in the microbiology laboratory next to them were chatting on the side.

Hearing Fan Yang ask about radioactive sterilization, his eyes were quickly attracted.

"Oh, this aspect. ”

When it comes to his own major, Tang Yuncheng is still willing to answer, somewhat presence, and thinks about it for a while, but he doesn't know how to organize the language.

After thinking for a long time, Tang Yuncheng asked, "This aspect is too broad, can you ask a little more clearly?"

Fan Yang took a look.

This Tang Yuncheng is a sign of being unsociable, is he a nerd?

"I'm sorry, I didn't make it clear, I'm sorry, it's like this, in addition to the foreign trade company, I also invested in the construction of a persimmon processing factory, a fruit canning production line, I heard that there is a kind of radioactive sterilization, which can increase the shelf life several times, can be stored for two or three years, I want to consult. ”

"Oh. Tang Yuncheng nodded: "Then you are asking about food preservation?"

"It's not preservation, it's preservation. ”

"If you save it, this principle is not complicated, does your company have an irradiation room?"

Fan Yang also didn't know much about it, so he didn't know how to ask.

Picking his head, it seems that Tang Yuncheng is not a dry sales material.

Yang Mei next to her smiled and took over: "Manager Fan wants to understand the entire sterilization process and process, do you want to introduce this technology?"

Fan Yang slapped his palms: "Yes, that's what it means, Sister Yang can help introduce me?"

"Have you ever smoked bacon at home?"

"It's been smoked. ”

Yang Mei said: "Did your mother teach you how to smoke bacon?"

"Wood has. ”

"Sister will teach you. ”

"Of course that's fine. ”

Yang Mei sneered: "It's not so simple, are you a child in the countryside? Wash the meat, wipe it clean, smear it with a layer of salt, and hang it up to dry." ”

Fan Yang was speechless.

"Why do you need to smear a lot of salt? It is to use salt to control the moisture in the fresh meat, change the composition of myoglobin, kill the active ingredients in the cell membrane, the cell loses its activity, and the myoglobin will not deteriorate, this is the first step, the second step, is through the osmotic pressure of salt, control the water in the cell, no water is not easy to breed bacteria, this is not enough, we also have to add a step of smoking, with high temperature to kill bacteria, which completes a most basic antiseptic measure. ”

"Applied to food hygiene, this is one of the traditional storage methods, manual drying, dehydrated storage, Manager Fan's food factory, is processing persimmons, right?"

"Yes, please advise. Fan Yang replied.

When it comes to professional things, Yangmei's face slowly became serious: "The traditional processing method of persimmon cake is natural air drying, why do you need to add salt when processing meat products? Because salt can produce enough osmotic pressure to help control the moisture in stem cells, while fruits do not need to, the sugar brought by the fruit can produce enough osmotic pressure, use the sun's ultraviolet rays to kill bacteria, accelerate air drying, you can achieve the purpose of preliminary preservation, this is also artificial drying, and you also have a fruit canning factory, right?"

"Yes. Fan Yang also put away his banter.

When Tang Yuncheng introduced, he called her an expert in food microbiology.

Fan Yang didn't dare to peep at all.

"And the storage method of canned fruit is different, but in general it is very simple, cleaning, peeling, removing the core, cutting into pieces, and then facing a problem, sterilization, although there are many commonly used sterilization methods, but in general there are only two differences, high temperature instantaneous sterilization, low temperature long-term sterilization, canned fruit is pasteurized, low temperature and long-term pre-cooking, the water temperature in the autoclave is controlled at about 60 degrees Celsius, killing bacteria at the same time, but also through continuous temperature, the fruit is cooked, killing the activity of cells, so that it will not deteriorate, adding sugar in the liquid of canned fruit, which is also to maintain osmotic pressure, osmotic pressure is enoughin order to continuously kill bacteria and maintain a good storage environment. ”

"The next step is to fill the can, it needs to be sealed, it needs osmotic pressure, but there must be a certain amount of space to maintain the concentration of oxygen at 5%, if it is higher than 5%, the aerobic bacteria on the food will multiply in large numbers, causing the food to spoil quickly, producing toxins such as nitrite, do you have a kimchi jar at home?" asked Yang Mei.

"Yes. ”

"Why can the vegetables in the kimchi jar be preserved for a long time? A good pot of kimchi can be kept for half a year, a year, the internal space of the kimchi jar is also such a structure, salt, can maintain sufficient osmotic pressure, change the protein structure, the existence of the mouth water, isolate the outside air, maintain the indoor environment, and maintain the oxygen concentration, which is another traditional preservation technology, enzyme tank storage technology. ”

"Thanks, but how to improve?" Fan Yang asked.

Yang Mei smiled: "You just consulted, and you haven't said the cost, it's very expensive to consult with me." ”

"No matter how expensive it is, I'm willing to do it. ”

Yang Ye said next to him: "We charge by the hour." ”

"Yes, money is not a problem, I'm afraid you won't accept it. ”

If he could hire the personnel of the Portland laboratory to guide him in sterilization and storage technology, Fan Yang would not blink an eye if he spent 180,000 yuan at a time.

"Hey, who's going to charge you money, I don't know who is in charge of the meal tonight. ”

"Haha, it's easy to do, tonight's bonfire dinner, I will roast the whole sheep. ”

"Hee-hee, then I'll be waiting for you to have a treat. ”

Yang Mei and the two girls next to her high-fived, and rubbed another big meal.

continued: "But these technologies are too traditional to be applied to industry, aren't you just asking about radiation sterilization? The three modern storage technologies, canning, deoxygenation, freezing, and the three major technologies, are all based on the level of radiation sterilization, which can help your enterprise, in terms of output, quality, and competitiveness, can improve a level, and it is also the only way for the development of large enterprises, but the investment is huge, to say a serious word, our laboratory is currently engaged in this research, and has mature technology, equipment, and introduction channels, which is really charged. ”

This is another layer of surprise.

Fan Yang just asked casually.

I didn't expect there to be a channel.

You must know that this has always been an embargo project of Western food companies against China.

The Chinese Academy of Sciences has been developing for many years, and the results can only be said to be average, and it is difficult for non-large enterprises to introduce.

The controls are also quite strict.

It's incredible.

"Can you still help me introduce equipment?" asked Fan Yang.

"You need to talk to Mr. Portland about that. Tang Yuncheng said beside him.

"Thank you, this is good news, bother Sister Yang to help me introduce it?" Fan Yang asked again.

"This is simple, what are the technical conditions for canning? A good low-oxygen environment, but also need enough osmotic pressure, but can not isolate oxygen, completely isolate oxygen, anaerobic bacteria will accelerate the reproduction, and even accelerate the decay, like a piece of bacon, a sausage, if you sterilize not thoroughly enough, rashly put into a sealed bag, vacuum packaging, its preservation time, it is better to be exposed to the air, do you know the canned luncheon meat?"

"Well, is this a radiation-sterilized product?" asked Fan Yang.

Yang Mei smiled: "Yes, low-oxygen, or oxygen-free canning, must be sterilized by radiation, using Y rays and β rays, adjusted to the appropriate dose, and radiation distance, range, only radioactive extinction, can completely kill all bacteria, including anaerobic bacteria." ”

"Oxygen removal packaging, which is the so-called vacuum packaging, is the same principle, it must be thoroughly sterilized, otherwise it will also spoil. ”

"And what about frozen packaging, you must know that the food in the refrigerator will deteriorate after a long time, the industrial freezing technology, called ultra-low temperature freezing technology, needs to be frozen at a low temperature of minus 40 degrees, fresh meat, can not be heat treated, only the use of radioactive sterilization, so that the processed meat products, in order to achieve the purpose of long-term preservation, processed chicken, beef, pork, fish products, can be preserved for decades. Yang Mei said.

"Decades?"

Not only Fan Yang, but also Zhao Guangming and others next to him, Lu Zhengshan, and Dajun all looked incredible, and their mouths opened into an O-shape.

"Decades, isn't that a zombie?" Zhao Guangming asked, licking his lips.

Kyoko Sugihara interjected next to him and said: "It's true, our country is the first to study ultra-low temperature freezing technology, military reserves can really be stored for decades, and ultra-low temperature liquid nitrogen freezing technology can freeze people with terminal illnesses, and when science develops in the future, they will wake up, heal again, and come back from the dead." ”

Sugihara Kyoko's words, Fan Yang listened to it okay.

After all, it is a person who has been born again.

But in this era, no one has written like this, even science fiction.

Pure cutting-edge knowledge.

"Can you live if you're dead?" isn't that immortal?" Zhao Guangming asked incredulously.

"Hmm. Sugihara Kyoko nodded, with a proud face: "Our country's science and technology are very powerful, the current disease cannot be treated, human tissue, the body, wait until the science and technology are reached in the future, and then wake up and re-treat." ”

This topic instantly detonated the atmosphere.

The crowd began to talk about it.

As for Fan Yang, he didn't expect that the frozen food had also been radiosterilized.

Zombie meat, Fan Yang knows, and knows quite a bit.

This chain is huge, and it can be called profiteering, because it is illegal.

It's all about smuggling.

The country of rice is the world's largest source of zombie meat.

During the Cold War, the United States did not know how many military reserve bases it had established, and a shelter kept thousands of people at every turn, and several years of drinking water, food and other reserves.

Changsha Customs has cracked a particularly large ZS frozen product case, seizing frozen beef, frozen duck neck, frozen chicken feet, etc., more than 800 tons, more than 10 million yuan.

When he was arrested, he was detained at customs for a few days.

At first, I didn't know what it was, but it was so stinky that the whole carriage vomited when I opened the door.

Looking at the production date of those outer packaging, the "meat age" is as long as thirty or forty years.

What else is 80 frozen meat, 70 frozen meat, older than the age of many people.

For a while, it caused an uproar in the country, and people were panicked.

But you also have to admire others for this freezing technology.

The quality of frozen meat for many years will be worse than that of fresh meat, but as long as there is no thawing during the freezing process, you cannot distinguish it in terms of appearance and taste.

However, the exception of smuggled meat, the transportation conditions are poor, and it is easy to breed all kinds of bacteria in the process of continuous thawing, and even start to rot and refreeze, and these meat products of unknown origin enter food stalls, restaurants, and even regular supermarkets through wholesale markets. With the rise of fresh e-commerce, some online platforms have also become its potential sales channels.

After marinating in soy sauce and seasoning with chili peppers, some of these meats are made into bagged cooked food, and some have evolved into "delicacies" on the table, which are difficult for consumers to distinguish between them.

There is also a pickled pepper phoenix claw, which is the "hardest hit area" for smuggling frozen products.

Especially those chicken feet that look chubby, white and tender, and look particularly good, are soaked in bleach agents such as hydrogen peroxide.

So it's better to eat less of these things.

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