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1957 In Science
The year 1957 in science and technology involved some significant events, listed below. Astronomy and space exploration * October 4 – Launch of Sputnik 1, the first artificial satellite, by an R-7 Semyorka rocket from the Baikonur Cosmodrome near Tyuratam in the Kazakh Soviet Socialist Republic. * November 3 – Launch of Sputnik 2, with a dog called Laika on board, the first animal sent into orbit. There is no technology available to return it to Earth. * December 6 – The United States attempts launch of Vanguard TV3 which fails after just two seconds in the air. * Project Orion begins, a U.S. program to build a spacecraft powered by nuclear explosions. * Wilhelm Gliese publishes the first Gliese Catalogue of Nearby Stars. Biology * Dopamine is first identified in the human brain by Katharine Montagu. * The structure of myoglobin is determined (using x-ray crystallography) by John Kendrew and colleagues in England. * The discovery of Na+/K+-ATPase, the first antiporte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myoglobin
Myoglobin (symbol Mb or MB) is an iron- and oxygen-binding protein found in the cardiac and skeletal muscle, skeletal Muscle, muscle tissue of vertebrates in general and in almost all mammals. Myoglobin is distantly related to hemoglobin. Compared to hemoglobin, myoglobin has a higher affinity for oxygen and does not have cooperative binding with oxygen like hemoglobin does. Myoglobin consists of non-polar amino acids at the core of the globulin, where the heme group is non-covalently bounded with the surrounding polypeptide of myoglobin. In humans, myoglobin is found in the bloodstream only after Strain (injury), muscle injury. (Google books link is the 2008 edition) High concentrations of myoglobin in muscle cells allow organisms to hold their breath for a longer period of time. Diving mammals such as whales and seals have muscles with particularly high abundance of myoglobin. Myoglobin is found in Type I muscle, Type II A, and Type II B; although many older texts describe myo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tang Feifan
Tang Feifan (; July 23, 1897 – September 30, 1958) was a Chinese medical microbiologist best known for culturing the ''Chlamydia trachomatis'' agent in the yolk sacs of eggs. Tang was persecuted during the "Pulling Out Bourgeois White Flag Movement" and committed suicide in 1958. Biography Early life Tang was born Tang Ruizhao () in Tangjiaping Village of Liling, Hunan, on July 23, 1897, to a relatively poor gentry family, during the Qing Empire. He was the second of three children. He had a younger brother, Tang Qiufan (). His father Tang Luquan () taught at a family friend He Zhongshan's () old-style private school, in which Tang Feifan studied poetry, history, philosophy, mathematics, and natural science. His son, He Jian, became Tang Feifan's close friend. "Learning from the West with its advanced science and technology；Invigorating the Chinese nation", Tang had often heard the hometown folks talk about reform and revolution in his childhood. When China was often ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacterium
Bacteria (; : bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit the air, soil, water, acidic hot springs, radioactive waste, and the deep biosphere of Earth's crust. Bacteria play a vital role in many stages of the nutrient cycle by recycling nutrients and the fixation of nitrogen from the atmosphere. The nutrient cycle includes the decomposition of dead bodies; bacteria are responsible for the putrefaction stage in this process. In the biological communities surrounding hydrothermal vents and cold seeps, extremophile bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. Bacteria also live in mutualistic, commensal and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlamydia Trachomatis
''Chlamydia trachomatis'' () is a Gram-negative, Anaerobic organism, anaerobic bacterium responsible for Chlamydia infection, chlamydia and trachoma. ''C. trachomatis'' exists in two forms, an extracellular infectious elementary body (EB) and an intracellular non-infectious reticulate body (RB). The EB attaches to host cells and enter the cell using Effector (biology), effector proteins, where it transforms into the metabolically active RB. Inside the cell, RBs rapidly replicate before transitioning back to EBs, which are then released to infect new host cells. The earliest description of ''C. trachomatis'' was in 1907 by Stanislaus von Prowazek and Ludwig Halberstädter as a protozoan. It was later thought to be a virus due to its small size and inability to grow in laboratories. It was not until 1966 when it was discovered as a bacterium by Electron microscope, electron microscopy after its internal structures were visually observed. There are currently 18 Serotype, serovars of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ugeskrift For Læger
''Ugeskrift for Læger'' (English: ''Weekly Journal for Physicians'') is a Danish medical journal published every Monday. It is written in Danish, and publishes original research Research is creative and systematic work undertaken to increase the stock of knowledge. It involves the collection, organization, and analysis of evidence to increase understanding of a topic, characterized by a particular attentiveness to ..., news, debate, job ads, etc. The journal was established in 1839 and has been available online since 1999. External links * (in Danish) Publications established in 1839 Weekly journals General medical journals Danish-language journals {{general-medical-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biochimica Et Biophysica Acta
''Biochimica et Biophysica Acta'' (''BBA'') is a peer review, peer-reviewed scientific journal in the field of biochemistry and biophysics that was established in 1947. The journal is published by Elsevier with a total of 100 annual issues in ten specialised sections. History Early years ''Biochimica et Biophysica Acta'' was first published in 1947 and was the first international journal to be devoted to the joint fields of biochemistry and biophysics.A short history of Elsevier (Elsevier; 2005) (accessed 12 December 2008) Published by Elsevier in cooperation with John Wiley & Sons, Interscience, it was the first international journal to be launched by Elsevier. The journal first made a profit in 1951 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aarhus University
Aarhus University (, abbreviated AU) is a public research university. Its main campus is located in Aarhus, Denmark. It is the second largest and second oldest university in Denmark. The university is part of the Coimbra Group, the Guild, and Utrecht Network of European universities and is a member of the European University Association. The university was founded in 1928 in Aarhus, Denmark. It comprises five faculties, Arts, Natural Sciences, Technical Sciences, Health, and Business and Social Sciences, and a total of twenty-seven departments. It is home to over thirty internationally recognised research centres, including fifteen centres of excellence funded by the Danish National Research Foundation. The university's alumni include Bjarne Stroustrup, the inventor of programming language C++; Queen Margrethe II of Denmark; King Frederik X of Denmark; and Anders Fogh Rasmussen, former prime minister of Denmark and secretary general of NATO. Nobel Laureate Jens Christi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jens Christian Skou
Jens Christian Skou (; 8 October 1918 – 28 May 2018) was a Danish biochemist and Nobel laureate. Early life Skou was born in Lemvig, Denmark to a wealthy family. His father Magnus Martinus Skou was a timber and coal merchant. His mother Ane-Margrethe Skou took over the company after the death of his father. At the age of 15, Skou entered a boarding school in Haslev, Zealand. He graduated in medicine from the University of Copenhagen in 1944 and received his doctorate in 1954. He began working at the Aarhus University in 1947 and was appointed professor of biophysics in 1977. He retired from the Aarhus University in 1988, but kept offices at the Department of Physiology (today part of the Department of Biomedicine). Career In 1997 he received the Nobel Prize in Chemistry (together with Paul D. Boyer and John E. Walker) for his discovery of Na+,K+-ATPase, making him, at the time of his death, the latest Danish Nobel laureate and the first at Aarhus University. Skou had t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enzyme
An enzyme () is a protein that acts as a biological catalyst by accelerating chemical reactions. The molecules upon which enzymes may act are called substrate (chemistry), substrates, and the enzyme converts the substrates into different molecules known as product (chemistry), products. Almost all metabolism, metabolic processes in the cell (biology), cell need enzyme catalysis in order to occur at rates fast enough to sustain life. Metabolic pathways depend upon enzymes to catalyze individual steps. The study of enzymes is called ''enzymology'' and the field of pseudoenzyme, pseudoenzyme analysis recognizes that during evolution, some enzymes have lost the ability to carry out biological catalysis, which is often reflected in their amino acid sequences and unusual 'pseudocatalytic' properties. Enzymes are known to catalyze more than 5,000 biochemical reaction types. Other biocatalysts include Ribozyme, catalytic RNA molecules, also called ribozymes. They are sometimes descr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antiporter
An antiporter (also called exchanger or counter-transporter) is an integral membrane protein that uses secondary active transport to move two or more molecules in opposite directions across a phospholipid membrane. It is a type of cotransporter, which means that uses the Exergonic reaction, energetically favorable movement of one molecule down its electrochemical gradient to power the Endergonic reaction, energetically unfavorable movement of another molecule up its electrochemical gradient. This is in contrast to symporters, which are another type of cotransporter that moves two or more ions in the same direction, and primary active transport, which is directly powered by Adenosine triphosphate, ATP. Transport may involve one or more of each type of solute. For example, the Sodium-calcium exchanger, Na+/Ca2+ exchanger, found in the plasma membrane of many cells, moves three sodium ions in one direction, and one calcium ion in the other. As with sodium in this example, antiport ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
