Latest poll_ Biden leads Trump slightly

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According to a report by Singapore’s Lianhe Zaobao on March 21, there are still a few months before the 2024 U.S. presidential election. A number of polls show that Democratic President Biden’s approval rating is slightly ahead of former Republican President Trump.

Reported that Biden and Trump have recently locked in the Democratic and Republican presidential candidacies. If nothing unexpected, the two will face off again in the presidential election.

According to reports, according to the Economist Weekly poll average, as of March 19, Biden led Trump slightly (44%) with a 45% approval rating. At least three polls conducted in March showed Biden would defeat Trump in the November presidential election.

The report also said that Reuters Ipsos conducted a survey of 3356 registered voters from March 7 to 13. The poll results showed that Biden would receive 39% of the votes, and Trump’s vote rate would be 38%.

Another poll, conducted from March 9 to 12, showed Biden would receive 45% of the vote, compared with Trump’s 44%.

The report pointed out that a number of previous polls have shown that most Americans do not want to see Biden and Trump rematch.

French President Macron approves Prime Minister Attar_s resignation request

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Paris, July 16 (Reporter Qiao Benxiao) The French Presidential Palace issued an announcement on the 16th saying that President Macron approved Prime Minister Attar’s resignation request on the same day and asked the Attar government to continue to handle daily government affairs before the new government is established.

The French Constitution and laws have no relevant provisions on the time when the president appoints the prime minister. The presidential palace announcement called on all mainstream parties to work together to establish alliances to end the transition period as soon as possible. In an open letter, Macron had previously called for mainstream parties to engage in dialogue and said he would appoint a new prime minister based on mainstream consensus.

On the 7th of this month, France held the second round of voting in the National Assembly election. According to French political tradition, after the National Assembly election, the Prime Minister will submit his resignation to the President regardless of the election outcome. On the 8th, Atar submitted his resignation to Macron, but was asked to stay in office temporarily to ensure national stability.

France’s new National Assembly is scheduled to hold its first plenary session on the 18th of this month and will elect a new speaker. After Attar’s resignation is approved, members of the elected members of Attar’s government can concurrently serve in the National Assembly. Attar himself was also elected to parliament.

There are 61 women victims of South Korea_s second _Room N_ incident. The two main offenders graduated from Seoul National University

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The second Room N incident broke out at Seoul National University in South Korea. According to South Korean media reports on May 22, as of now, as many as 61 female victims have been confirmed, including 12 students at Seoul National University.

The Seoul Police Department has so far arrested five gang suspects, two of whom are graduates of Seoul National University. They are suspected of making and privately spreading them on the instant messaging software T from July 2021 to April this year. Pornographic photos or videos synthesized using deep counterfeiting technology.

According to the police, in the process of arresting the main offender Park, the private reporting group Tracking Group Sparks, which first reported the incident in Room N five years ago, provided decisive assistance. Yuan Enzhi, who was in the pursuit team, disguised himself as a male, entered the private live broadcast room to lurk for two years, and contacted Park. This year, he lured Park to meet offline to help the police successfully capture him.

Russian official_ US authorizes Ukraine to launch new attacks on Russian territory

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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)

Russia and Uzbekistan each hand over 95 detained military personnel to each other

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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)

The bombing of the Sudanese Presidential Palace caused a fire to the Old Republican Palace in the Presidential Palace

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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

Israeli army says operation Shifa hospital will not end until all Palestinian militants are captured

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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.

White House comments on Russia_s election_ disagree_ don_t care

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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)

Superspiral structure of DNA

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  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.

There are amino groups and carboxyl groups in protein molecules

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  (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.