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Xu Guangxian
Xu Guangxian (; November 7, 1920 – April 28, 2015), also known as Kwang-hsien Hsu, was a Chinese chemist. He was an academician of the Chinese Academy of Science who is respected for his contributions in both theoretical and experimental chemistry. He is a former president of the Chinese Chemical Society, and is known as "The Father of Chinese Rare Earths Chemistry". Early life and education Xu was born in Shaoxing, Zhejiang on November 7, 1920. He entered Hangzhou Advanced Industrial Vocational School in Zhejiang (now part of Zhejiang University of Technology). Due to the Anti-Japanese War, the students and faculty were relocated to an advanced industrial school in Ningbo, where Xu graduated in 1939. In 1940 Xu entered Jiaotong University in Shanghai (now known as Shanghai Jiao Tong University, SJTU). Again, there was disruption at the university because of the war. Xu received his B.Sc. in 1944. In 1945, Xu Guangxian worked as a teaching assistant at SJTU, with professor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shaoxing
Shaoxing (; ) is a prefecture-level city on the southern shore of Hangzhou Bay in northeastern Zhejiang province, China. It was formerly known as Kuaiji and Shanyin and abbreviated in Chinese as (''Yuè'') from the area's former inhabitants. Located on the south bank of the Qiantang River estuary, it borders Ningbo to the east, Taizhou to the southeast, Jinhua to the southwest, and Hangzhou to the west. As of the 2020 census, its population was 5,270,977 inhabitants among which, 2,958,643 (Keqiao, Yuecheng and Shangyu urban districts) lived in the built-up (or metro) area of Hangzhou-Shaoxing, with a total of 13,035,326 inhabitants. Notable residents of Shaoxing include Wang Xizhi, the parents of Zhou Enlai, Lu Xun, and Cai Yuanpei. It is also noted for Shaoxing wine, meigan cai, and stinky tofu, and was featured on ''A Bite of China''. Its local variety of Chinese opera sung in the local dialect and known as Yue opera is second in popularity only to Peking opera. In 2010, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York University
New York University (NYU) is a private research university in New York City. Chartered in 1831 by the New York State Legislature, NYU was founded by a group of New Yorkers led by then-Secretary of the Treasury Albert Gallatin. In 1832, the non-denominational all-male institution began its first classes near City Hall based on a curriculum focused on a secular education. The university moved in 1833 and has maintained its main campus in Greenwich Village surrounding Washington Square Park. Since then, the university has added an engineering school in Brooklyn's MetroTech Center and graduate schools throughout Manhattan. NYU has become the largest private university in the United States by enrollment, with a total of 51,848 enrolled students, including 26,733 undergraduate students and 25,115 graduate students, in 2019. NYU also receives the most applications of any private institution in the United States and admission is considered highly selective. NYU is organized int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Weapons
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions (thermonuclear bomb), producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter. The first test of a fission ("atomic") bomb released an amount of energy approximately equal to . The first thermonuclear ("hydrogen") bomb test released energy approximately equal to . Nuclear bombs have had yields between 10 tons TNT (the W54) and 50 megatons for the Tsar Bomba (see TNT equivalent). A thermonuclear weapon weighing as little as can release energy equal to more than . A nuclear device no larger than a conventional bomb can devastate an entire city by blast, fire, and radiation. Since they are weapons of mass destruction, the proliferation of nuclear weapons is a focus of international relations policy. Nuclear weapons have been deployed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiation Chemistry
Radiation chemistry is a subdivision of nuclear chemistry which is the study of the chemical effects of radiation on matter; this is very different from radiochemistry as no radioactivity needs to be present in the material which is being chemically changed by the radiation. An example is the conversion of water into hydrogen gas and hydrogen peroxide. Radiation interactions with matter As ionizing radiation moves through matter its energy is deposited through interactions with the electrons of the absorber. The result of an interaction between the radiation and the absorbing species is removal of an electron from an atom or molecular bond to form radicals and excited species. The radical species then proceed to react with each other or with other molecules in their vicinity. It is the reactions of the radical species that are responsible for the changes observed following irradiation of a chemical system. Charged radiation species (α and β particles) interact through Coulombic f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actinides
The actinide () or actinoid () series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. The actinide series derives its name from the first element in the series, actinium. The informal chemical symbol An is used in general discussions of actinide chemistry to refer to any actinide. The 1985 IUPAC ''Red Book'' recommends that ''actinoid'' be used rather than ''actinide'', since the suffix ''-ide'' normally indicates a negative ion. However, owing to widespread current use, ''actinide'' is still allowed. Since ''actinoid'' literally means ''actinium-like'' (cf. ''humanoid'' or ''android''), it has been argued for semantic reasons that actinium cannot logically be an actinoid, but IUPAC acknowledges its inclusion based on common usage. All the actinides are f-block elements, except the final one (lawrencium) which is a d-block element. Actinium has sometimes been considered d-block instead of lawrencium, but the clas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lanthanides
The lanthanide () or lanthanoid () series of chemical elements comprises the 15 metallic chemical elements with atomic numbers 57–71, from lanthanum through lutetium. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare-earth elements or rare-earth metals. The informal chemical symbol Ln is used in general discussions of lanthanide chemistry to refer to any lanthanide. All but one of the lanthanides are f-block elements, corresponding to the filling of the 4f electron shell. There is some dispute on whether lanthanum or lutetium is a d-block element, but lutetium is usually considered so by those who study the matter; it is included due to its chemical similarities with the other 14. All lanthanide elements form trivalent cations, Ln3+, whose chemistry is largely determined by the ionic radius, which decreases steadily from lanthanum to lutetium. These elements are called lanthanides because the elements in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peking University
Peking University (PKU; ) is a public research university in Beijing, China. The university is funded by the Ministry of Education. Peking University was established as the Imperial University of Peking in 1898 when it received its royal charter by the Guangxu Emperor. A successor of the older ''Guozijian'' Imperial College, the university's romanized name 'Peking' retains the older transliteration of 'Beijing' that has been superseded in most other contexts. Perennially ranked as one of the top academic institutions in China and the world; as of 2021 Peking University was ranked 16th globally and 1st in the Asia-Pacific & emerging countries by Times Higher Education, while as of 2022 it was ranked 12th globally and 1st in Asia by QS University Rankings. Throughout its history, Peking University has had an important role "at the center of major intellectual movements" in China. Abolished of its status as a royal institution after the fall of the Qing dynasty and the Xinhai R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean War
, date = {{Ubl, 25 June 1950 – 27 July 1953 (''de facto'')({{Age in years, months, weeks and days, month1=6, day1=25, year1=1950, month2=7, day2=27, year2=1953), 25 June 1950 – present (''de jure'')({{Age in years, months, weeks and days, month1=6, day1=25, year1=1950) , place = Korean Peninsula, Yellow Sea, Sea of Japan, Korea Strait, China–North Korea border , territory = Korean Demilitarized Zone established * North Korea gains the city of Kaesong, but loses a net total of {{Convert, 1506, sqmi, km2, abbr=on, order=flip, including the city of Sokcho, to South Korea. , result = Inconclusive , combatant1 = {{Flag, First Republic of Korea, name=South Korea, 1949, size=23px , combatant1a = {{Plainlist , * {{Flagicon, United Nations, size=23px United Nations Command, United Nations{{Refn , name = nbUNforces , group = lower-alpha , On 9 July 1951 troop constituents were: US: 70.4%, ROK: 23.3% other UNC: 6.3%{{Cite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Republic Of China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Civil War
The Chinese Civil War was fought between the Kuomintang-led government of the Republic of China and forces of the Chinese Communist Party, continuing intermittently since 1 August 1927 until 7 December 1949 with a Communist victory on mainland China. The war is generally divided into two phases with an interlude: from August 1927 to 1937, the KMT-CCP Alliance collapsed during the Northern Expedition, and the Nationalists controlled most of China. From 1937 to 1945, hostilities were mostly put on hold as the Second United Front fought the Japanese invasion of China with eventual help from the Allies of World War II, but even then co-operation between the KMT and CCP was minimal and armed clashes between them were common. Exacerbating the divisions within China further was that a puppet government, sponsored by Japan and nominally led by Wang Jingwei, was set up to nominally govern the parts of China under Japanese occupation. The civil war resumed as soon as it bec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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