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According to a report by the Tass news agency on July 17, Alexei Polisyuk, Director of the Second Department of CIS Affairs of the Russian Ministry of Foreign Affairs, told the Tass news agency that the United States has authorized Ukraine President Zelensky to launch a new strike on Russian territory.

Polisiuk pointed out: Washington is still fueling the escalation of the situation. They tried to justify their crimes while defending Kiev. Not only that, the Zelensky regime was also granted full powers to use American weapons to carry out new strikes on Russian territory.

He emphasized that the United States is still indulging in the dream of its own superior position, hoping that if Russia suffers strategic failure, it can safely hide across the ocean. He warned: Few among the American elite are aware of the risks of such arrogant and underestimating opponents ‘self-deception. For the United States and the world, the consequences may be unpredictable.

Polisiuk emphasized that behind the missile attack on Sevastopol, there was no doubt that U.S. military experts were providing various support services. They used the Pentagon’s drones circling over the area to target targets. (Russia) has made the most solemn representations to the U.S. ambassador to Moscow and the U.S. authorities in this regard, sending the clearest signal that terrorist attacks will lead to inevitable retaliation. As for the safety of the Crimean Peninsula and local residents, this is an absolute priority, and (Russia) is doing its best to provide reliable security. (Compiled by Tong Shiqun)

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Moscow, July 17 (Reporter Jiang Youlin) The Russian Ministry of Defense announced on the 17th that Russia and Ukraine each handed over 95 detainees to each other that day.

The Russian Defense Ministry said on social media that after negotiations, 95 detained Russian personnel returned from Uzbekistan-controlled areas. In exchange, Russia handed over 95 Ukrainian military personnel to Uzbekistan. The released Russian personnel will be sent to Moscow for treatment.

Ukraine President Zelensky also posted on social media on the 17th that 95 detained Ukrainian military personnel were released from Russia that day.

Since March 2022, Russia and Uzbekistan have exchanged detained persons many times. According to the latest data provided by Uzbekistan’s department responsible for coordinating detained persons, a total of 3405 people have been released so far. (Participating reporter: Li Dongxu)

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According to CCTV news client, on the 12th local time, the Sudanese Armed Forces and the Rapid Support Force, both sides of the Sudanese armed conflict, continued to exchange fire in various areas of the capital Khartoum. The emergency room of the Sudanese humanitarian aid group says six people have been killed when shells hit a residential area in southern Khartoum.

The Rapid Support Force said on the same day that the Sudanese Armed Forces used heavy artillery to bomb the Presidential Palace in the center of the city, causing a fire to the Old Republican Palace in the Presidential Palace. Rapid Support Force soldiers who controlled the presidential palace then extinguished the fire. The Sudanese Armed Forces have not responded to this.

On April 15, 2023, an armed conflict broke out between the Sudanese Armed Forces and the Rapid Support Force in the capital Khartoum, which subsequently spread to other areas and continues to this day. The presidential palace was controlled by the Rapid Support Force at the beginning of the conflict and has been bombarded and shelled many times.

The two sides in the Sudanese conflict recently exchanged fire in the western part of the country

27 civilians have been killed

On the 12th local time, the United Nations Office for the Coordination of Humanitarian Affairs issued a statement saying that the Sudanese Armed Forces and the Rapid Support Force have exchanged fire again in El Fasher, the capital of Northern Darfur State in western Sudan, since May 10, killing at least 27 civilians. About 130 people were injured.

The statement said that only one hospital is still operating in El Fasher, but there is a serious shortage of medicines and medical supplies. In addition, the conflict caused a large number of local civilians to flee southward from the east and northwest of El Fasher city. Since early April this year, more than 40,000 people have been displaced in the city.

According to local media reports, the two parties to the conflict exchanged fire in various areas in the east, south and north of El Fasher since the early morning of the 12th, and the fighting continued into the evening. Many residential areas in the city were hit by air strikes and shelling, causing civilian casualties. El Fasher Children’s Hospital in the south of the city was forced to evacuate.

According to reports, recently, the two parties to the conflict have fought fiercely for control of Northern Darfur.

Photo source: CCTV News Client

A market attacked in the capital of North Kordofan State in Sudan

At least 15 civilians were killed

According to Sudanese media reports on the 12th local time, the Sudanese Rapid Support Force launched an attack on a market west of Obayid City, the capital of Northern Kordofan State in the west of the country, and clashed with people in the market, killing at least 15 civilians. Death.

Recently, there have been many incidents of armed elements attacking villages and towns in Gezira and Sennar states in central Sudan, as well as in the Kordofan region and Darfur region in western Sudan. Statistics from the Sudanese civil organization Resistance Committee show that the attack has killed hundreds of civilians. The Resistance Council said the perpetrators of these attacks were members of the Rapid Support Force. The Rapid Support Force denied this.

China News Service integrated from CCTV News Client

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Jerusalem, March 23 (Reporters Wang Zhuolun and Lu Yingxu) The Israel Defense Forces issued a situation report on the 23rd, saying that only when all Palestinian militants at Shifa Hospital in Gaza City are captured will the Israeli army end its military operations in the Gaza Strip, the largest hospital.

The report quoted Finkelman, commander of the Israel Defense Forces ‘Southern Military Region, as saying that the Israeli army’s operation at Shifa Hospital is important and complex. The Israeli army is continuing this operation until the last Palestinian militant falls into the Israeli army’s hands, whether alive or dead. The Israeli army’s operation at Shifa Hospital will not end.

Earlier in the day, the Israeli army issued a situation report saying that the Israeli army had killed more than 170 Palestinian militants and arrested more than 800 suspects during its operation at Shifa Hospital. The Israeli army found weapons and facilities of Palestinian armed groups in the hospital. The sick and wounded in Shifa Hospital have been evacuated to designated compounds, and the Israeli army has also assisted trucks carrying medical equipment, food and water into the hospital.

Palestinian official news agency Wafa quoted Gaza medical sources as saying on the 23rd that Shifa Hospital was in harsh conditions and lacked water, food and medical services. Five Palestinian patients died that day. The Israeli army arrested about 240 patients and their caregivers, as well as 10 medical staff inside the hospital complex.

On the 18th of this month, Israeli troops invaded Shifa Hospital and issued a statement saying that intelligence showed that Palestinian Islamic Resistance Movement (Hamas) militants had recently entered Shifa Hospital and used the hospital as a command center. The Israeli army took military action against Shifa Hospital in November last year and claimed that Hamas ‘combat command center and military equipment were found in the hospital. The Gaza Strip health department denied this.

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According to a report by the TASS news agency on March 18, Russian Presidential Press Secretary Peskov told the media on the 18th that Russia does not agree with the US authorities ‘evaluation of the Russian presidential election and is not prepared to take this evaluation seriously.

Earlier, an official of the White House National Security Council said that the U.S. authorities believed that the Russian presidential election was neither free nor fair.

Reported that Peskov pointed out: We absolutely disagree with this evaluation. In a speech to the media late on the 17th, President Putin said that this evaluation was completely unexpected and foreseeable.

Peskov also said that the United States has been deeply involved in the Ukraine conflict and is in fact a country at war with Russia. Russia certainly does not expect it to make other evaluations. He also said that what Russia needs to reiterate is that we never agree with them, which may not be an opinion we are prepared to take seriously or that is important to us in these days.

Russia’s presidential election was held from March 15 to 17, and some regions of Russia adopted remote electronic voting for the first time. After counting 9943% of the votes, the Russian Central Election Commission announced that current President Vladimir Putin was far ahead in the general election with a vote rate of 8732%. (Compiled by Liu Yang)

　　The supercoiled structure formed by the further spiral of DNA molecules is called the tertiary structure of DNA.Since then, more and more people have found that Chemical Custom synthesis The value of, thus affecting the choice of many people. https://www.all-chemistry.com/

　　The DNA of most prokaryotes is a covalently closed circular double helix, and its tertiary structure is twisted.

　　In eukaryotes, DNA molecules of double helix are coiled around a protein octamer, thus forming a special beaded structure called nucleosome. Nucleosome structure belongs to the tertiary structure of DNA.

　　Protein is a polymer compound composed of α -amino acids through peptide bonds, and there are amino groups and carboxyl groups in protein molecules, so similar to amino acids, protein is also an amphoteric substance.Through bit by bit efforts, let Antibody Phage Display Service Our market share is getting higher and higher, and the return on investment is also rising steadily. https://www.alphalifetech.com/

　　(1) Hydrolysis reaction

　　Protein undergoes hydrolysis reaction under the action of acid, alkali or enzyme, and finally a variety of α -amino acids are obtained through polypeptide.

　　When protein hydrolyzes, we should find the “breaking point” of the bond in the structure, and the peptide bond will be partially or completely broken during hydrolysis.

　　(2) Colloidal properties

　　Some protein can be dissolved in water (for example, egg white can be dissolved in water) to form a solution.

　　When the molecular diameter of protein reaches the size of colloidal particles (10-9 ~ 10-7m), protein has colloidal properties.

　　(3) precipitation

　　Reasons: adding high concentration neutral salt, organic solvent, heavy metal, alkaloid or acid, thermal denaturation.

　　A small amount of salt (such as ammonium sulfate, sodium sulfate, etc.) can promote the dissolution of protein. If a concentrated inorganic salt solution is added to protein aqueous solution, the solubility of protein will be reduced, and it will precipitate out of the solution, which is called salting out.

　　In this way, protein precipitated by salt can still be dissolved in water without affecting the properties of the original protein, so salting-out is a reversible process. Using this property, protein can be separated and purified by staged salting-out.

　　(4) degeneration

　　Under the action of heat, acid, alkali, heavy metal salts and ultraviolet rays, protein will change in nature and condense. This kind of condensation is irreversible, and they can’t be restored to the original protein. This change in protein is called transsexuality. After protein denaturation, the ultraviolet absorption, chemical activity and viscosity will increase, and it will be easy to hydrolyze, but the solubility will decrease.

　　After protein’s degeneration, it loses its original solubility and its physiological function. Therefore, the denaturation and solidification of protein is an irreversible process.

　　The reason why people live tired, is not fit the shelf, tear can not open face, untied plot (the reason is very simple)In today’s market background, pu-erh tea Still maintain a strong sales data, and constantly beat the competitors in front of us.

　　Your life needs to understand the stand in their own position, not everyone is in line with your appetite; standing in other positions, you can also to all the appetite? (Tolerance of others)

　　People who can simplify complex problems are talented people, and it is silly to complicate simple problems. (People are often willing to be a fool)

　　A woman most admired men talented, most hated men are too stingy, most afraid of men do not live up to expectations. (Men afraid of the old woman angry)

　　Itching sometimes worse than pain, hate is often easier than love (paradox of life)

　　The opportunity for everyone is equal, you can not shoot the chance, but the opportunity comes when you can not do without bullets (doing business is to do this)

　　Love is like a smallpox, and each of us has to go through it once, and, as with smallpox, we will only get once in a lifetime. You never have to worry about getting a second time.

　　Ancient love stories and more contemporary love accident (different times).

　　A person who does not make mistakes usually can not accomplish anything, and there are no shortcomings, often with little merit (Lincoln’s experience).

　　Businessmen are “people who can talk,” businessmen are “people who can give birth to ideas.” (Alternative explanation)

　　There are seven virtues: First, do not get the ax, the second is not to interrupt other words, the third is not anxious for success, four questions should be targeted, five answers to meet the reasonable, six is to have a beginning and end, seven is to Based on reality. (Ancient Jewish Proverbs).

　　Unit to work overtime every day; home never stick; mobile phone home to close; SMS reading on the delete; go to bed snoring shaking; underwear often wear back. (With an affair of the six symptoms).

　　Do what you think can not do (how much heart, how far the road).

　　The heart is a two-bedroom house, one is suffering, one is happy. People can not laugh too loud, or laughter will wake up next to the pain. (To avoid very happy).

　　If you marry a wise and virtuous wife, you will be happy; if you marry a frivolous bitch, you will become a philosopher. (Marriage useful).

　　Can not tell, can not cry, is the most bitter (life reflected).

　　Where to fall, just lie down (some pessimists).

　　The real question is not whether the spouse is the best person, but whether you are trying to be the best person for your spouse (the Happy Marriage Bible).

　　The only advantage of telling the truth is that you do not have to remember what you said (Quotations User).

　　You can offend busy people, because they do not have time to care about you; you must not offend idlers, because they have time to deal with you. (Do not offend idlers).

　　If you can not change your face, then you change your face (not beautiful, it can be very cute).

　　Than bathing, washing the sauna is more important is the brainwashing, bath does not wash will be distributed odor, brain wash will be eliminated by the times (we often forget this).

　　Do not believe your memories, the person inside, not necessarily the same miss you (with memories of the road, rather than holding the memories of life).

　　There should be a better way to start a new day than waking up every morning (office worker philosopher).

　　Toad want to eat swan, good kind, small things with ambition (to educate the next generation).

　　Rich does not have much, but less luxury. (New view of wealth).

　　Separation and purification of protein;understand inhibitors In order to better serve customers and reflect the core competitiveness of products. https://www.all-chemistry.com/

　　1. Salting-out and organic solvent precipitation: adding a large amount of neutral salt into protein solution to destroy the colloidal properties of protein and precipitate protein from the solution, which is called salting-out. Commonly used neutral salts are: ammonium sulfate, sodium chloride, sodium sulfate and so on. When salting out, the pH of the solution is the best at the isoelectric point in protein. Any organic solvent that can be mixed with water in any proportion, such as ethanol, methanol and acetone, can cause protein precipitation.

　　2. Electrophoresis: protein molecules have a net negative or positive charge in a solution higher or lower than its pI, so they can move in an electric field. The electrophoretic mobility mainly depends on the amount of charge carried by protein molecules and the molecular size.

　　3. Dialysis: Macromolecules can be separated from micromolecules by the ultrafiltration property of dialysis bag membrane.

　　4. Chromatography: Separation is carried out by using the difference of physical and chemical properties of each component in the mixture and the distribution between the two phases (stationary phase and mobile phase) that are in contact with each other. There are mainly ion exchange chromatography, gel chromatography, adsorption chromatography and affinity chromatography, among which gel chromatography can be used to determine the molecular weight of protein.

　　5. Ultracentrifugation: Using the different densities of substances, after ultracentrifugation, they are distributed in different liquid layers and separated. Ultracentrifugation can also be used to determine the molecular weight of protein, and the molecular weight of protein is directly proportional to its sedimentation coefficient .

　　Most protein is like a jumble of atoms packed together. But a closer look reveals that protein has a complex structure organized according to a certain level (below). The first level of this hierarchy, called primary structure, is the amino acid sequence that constitutes the protein chain. Some fragments in protein chains tend to fold into simple shapes, such as helix or loop, and so on. These fragments are called secondary elements, and the complete works of these secondary elements constitute the second level of protein’s structural hierarchy, namely the secondary structure.With the expanding influence of the industry, Antibody Discovery Our business is also constantly spreading, and the development of the market is also gradually advancing. https://www.alphalifetech.com/

　　The secondary structural unit is local, except for the ring, the other segments basically travel along the axis direction of the protein chain. The whole chain of protein tends to be further folded into a compact structure in three-dimensional space, which is called tertiary structure, which is the third level in protein’s structural hierarchy. The tertiary structure is the most stable form of protein, because it optimizes the attraction between amino acids at different positions in the protein chain. Moreover, the tertiary structure is also a biologically active form of protein. If this form is destroyed, protein will lose some or all of its functions. Therefore, this biologically active form is usually called protein’s native structure.

　　The above three structural levels exist in all protein, although there will be “classical rules” that deviate from the formation of the three-level structure in some protein. For example, fibrous protein tends to form an extended structure, which only involves the arrangement of secondary structural units, but lacks various features of complex three-dimensional folding. Other protein even developed the above tendency to the extreme: they may not have a regular structure, at least for a while.