|
Bohumil Kučera (1874–1921)
Bohumil Kučera (March 22, 1874 in Semily – April 16, 1921 in Prague) was a Czech physicist. Biography Kučera studied physics at the Charles University in Prague and was the first scientist in Czech lands to examine the newly discovered effect of radioactivity. In 1912 he became professor of experimental physics at the university. He was the first to study droplets of mercury used as electrode (author of ''Zur Oberflächenspannung von polarisiertem Quecksilber'', 1903). His work was the basis for the discovery of polarography by Jaroslav Heyrovský. Kučera died prematurely due to his bohemian Bohemian or Bohemians may refer to: *Anything of or relating to Bohemia Beer * National Bohemian, a brand brewed by Pabst * Bohemian, a brand of beer brewed by Molson Coors Culture and arts * Bohemianism, an unconventional lifestyle, origin ... lifestyle. External links Very short biography (in Czech) 1874 births 1921 deaths People from Semily Czech physicists Charles Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bohumil Kučera (1874–1921)
Bohumil Kučera (March 22, 1874 in Semily – April 16, 1921 in Prague) was a Czech physicist. Biography Kučera studied physics at the Charles University in Prague and was the first scientist in Czech lands to examine the newly discovered effect of radioactivity. In 1912 he became professor of experimental physics at the university. He was the first to study droplets of mercury used as electrode (author of ''Zur Oberflächenspannung von polarisiertem Quecksilber'', 1903). His work was the basis for the discovery of polarography by Jaroslav Heyrovský. Kučera died prematurely due to his bohemian Bohemian or Bohemians may refer to: *Anything of or relating to Bohemia Beer * National Bohemian, a brand brewed by Pabst * Bohemian, a brand of beer brewed by Molson Coors Culture and arts * Bohemianism, an unconventional lifestyle, origin ... lifestyle. External links Very short biography (in Czech) 1874 births 1921 deaths People from Semily Czech physicists Charles Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semily
Semily (; german: Semil) is a town in the Liberec Region of the Czech Republic. It has about 8,100 inhabitants. Administrative parts Town parts of Bítouchov and Podmoklice and the village of Spálov are administrative parts of Semily. Geography Semily is located about southeast of Liberec. It lies on the confluence of rivers Jizera and its left tributary Oleška. There is a nature reserve called Jizera Valley. Most of the municipal territory lies in the Giant Mountains Foothills. In the southwest, it extends into the Ještěd–Kozákov Ridge. The highest peak of the territory is Medenec hill with an altitude of . History The first written mention of Semily is from 1352, when existence of a church is mentioned. In the middle of the 19th century, the settlement transformed into a wealthy town when the industrialization arrived and the development of rail transport occurred. Semily also profited from an advantageous location near the Jizera River. Demographics Sights The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prague
Prague ( ; cs, Praha ; german: Prag, ; la, Praga) is the capital and largest city in the Czech Republic, and the historical capital of Bohemia. On the Vltava river, Prague is home to about 1.3 million people. The city has a temperate oceanic climate, with relatively warm summers and chilly winters. Prague is a political, cultural, and economic hub of central Europe, with a rich history and Romanesque, Gothic, Renaissance and Baroque architectures. It was the capital of the Kingdom of Bohemia and residence of several Holy Roman Emperors, most notably Charles IV (r. 1346–1378). It was an important city to the Habsburg monarchy and Austro-Hungarian Empire. The city played major roles in the Bohemian and the Protestant Reformations, the Thirty Years' War and in 20th-century history as the capital of Czechoslovakia between the World Wars and the post-war Communist era. Prague is home to a number of well-known cultural attractions, many of which survived the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Czechs
The Czechs ( cs, Češi, ; singular Czech, masculine: ''Čech'' , singular feminine: ''Češka'' ), or the Czech people (), are a West Slavic ethnic group and a nation native to the Czech Republic in Central Europe, who share a common ancestry, culture, history, and the Czech language. Ethnic Czechs were called Bohemians in English until the early 20th century, referring to the former name of their country, Bohemia, which in turn was adapted from the late Iron Age tribe of Celtic Boii. During the Migration Period, West Slavic tribes settled in the area, "assimilated the remaining Celtic and Germanic populations", and formed a principality in the 9th century, which was initially part of Great Moravia, in form of Duchy of Bohemia and later Kingdom of Bohemia, the predecessors of the modern republic. The Czech diaspora is found in notable numbers in the United States, Canada, Israel, Austria, Germany, Slovakia, Ukraine, Switzerland, Italy, the United Kingdom, Australia, France, Russ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physicist
A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate causes of phenomena, and usually frame their understanding in mathematical terms. Physicists work across a wide range of research fields, spanning all length scales: from sub-atomic and particle physics, through biological physics, to cosmological length scales encompassing the universe as a whole. The field generally includes two types of physicists: experimental physicists who specialize in the observation of natural phenomena and the development and analysis of experiments, and theoretical physicists who specialize in mathematical modeling of physical systems to rationalize, explain and predict natural phenomena. Physicists can apply their knowledge towards solving practical problems or to developing new technologies (also known as applie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles University In Prague
Charles University ( cs, Univerzita Karlova, UK; la, Universitas Carolina; german: Karls-Universität), also known as Charles University in Prague or historically as the University of Prague ( la, Universitas Pragensis, links=no), is the oldest and largest university in the Czech Republic. It is one of the List of oldest universities in continuous operation, oldest universities in Europe in continuous operation. Today, the university consists of 17 faculties located in Prague, Hradec Králové, and Plzeň. Charles University belongs among the top three universities in Central and Eastern Europe. It is ranked around 200–300 in the world. History Medieval university (1349–1419) The establishment of a medieval university in Prague was inspired by Holy Roman Emperor Charles IV, Holy Roman Emperor, Charles IV. He asked his friend and ally, Pope Clement VI, to do so. On 26 January 1347 the pope issued the bull establishing a university in Prague, modeled on the University of Paris, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury (element)
Mercury is a chemical element with the symbol Hg and atomic number 80. It is also known as quicksilver and was formerly named hydrargyrum ( ) from the Greek words, ''hydor'' (water) and ''argyros'' (silver). A heavy, silvery d-block A block of the periodic table is a set of elements unified by the atomic orbitals their valence electrons or vacancies lie in. The term appears to have been first used by Charles Janet. Each block is named after its characteristic orbital: s-blo ... element, mercury is the only metallic element that is known to be liquid at standard temperature and pressure; the only other element that is liquid under these conditions is the halogen bromine, though metals such as caesium, gallium, and rubidium melt just above room temperature. Mercury occurs in deposits throughout the world mostly as cinnabar (mercuric sulfide). The red pigment vermilion is obtained by Mill (grinding), grinding natural cinnabar or synthetic mercuric sulfide. Mercury is used in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrode
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air). Electrodes are essential parts of batteries that can consist of a variety of materials depending on the type of battery. The electrophore, invented by Johan Wilcke, was an early version of an electrode used to study static electricity. Anode and cathode in electrochemical cells Electrodes are an essential part of any battery. The first electrochemical battery made was devised by Alessandro Volta and was aptly named the Voltaic cell. This battery consisted of a stack of copper and zinc electrodes separated by brine-soaked paper disks. Due to fluctuation in the voltage provided by the voltaic cell it wasn't very practical. The first practical battery was invented in 1839 and named the Daniell cell after John Frederic Daniell. Still making use of the zinc–copper electrode combination. Since then many more batteries have be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polarography
Polarography is a type of voltammetry where the working electrode is a dropping mercury electrode (DME) or a static mercury drop electrode (SMDE), which are useful for their wide cathodic ranges and renewable surfaces. It was invented in 1922 by Czechs, Czech chemist Jaroslav Heyrovský, for which he won the Nobel prize in 1959. The main advantages of mercury as electrode material are as follows: 1) a large voltage window: ca. from +0.2 V to -1.8 V vs reversible hydrogen electrode (RHE). Hg electrode is particularly well-suited for studying electroreduction reactions. 2) very reproducible electrode surface, since mercury is liquid. 3) very easy cleaning of the electrode surface by making a new drop of mercury from a large Hg pool connected by a glass capillary. Polarography played a major role as an experimental tool in the advancement of both Analytical Chemistry and Electrochemistry until the 1970s, when it was supplanted by other methods, that did not require the use of mercury ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jaroslav Heyrovský
Jaroslav Heyrovský () (December 20, 1890 – March 27, 1967) was a Czech chemist and inventor. Heyrovský was the inventor of the polarographic method, father of the electroanalytical method, and recipient of the Nobel Prize in 1959 for his discovery and development of the polarographic methods of analysis. His main field of work was polarography. Life and work Jaroslav Heyrovský was born in Prague on December 20, 1890, the fifth child of Leopold Heyrovský, Professor of Roman Law at the Charles University in Prague, and his wife Clara, née Hanl von Kirchtreu. He obtained his early education at secondary school until 1909 when he began his study of chemistry, physics, and mathematics at the Charles University in Prague. From 1910 to 1914 he continued his studies at University College London, under Professors Sir William Ramsay, W. C. McC. Lewis, and F. G. Donnan, taking his B.Sc. degree in 1913. He was particularly interested in working with Professor Donnan, on electr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bohemianism
Bohemianism is the practice of an unconventional lifestyle, often in the company of like-minded people and with few permanent ties. It involves musical, artistic, literary, or spiritual pursuits. In this context, bohemians may be wanderers, adventurers, or vagabonds. Bohemian is a 19th-century historical and literary topos that places the milieu of young metropolitan artists and intellectuals—particularly those of the Latin Quarter in Paris—in a context of poverty, hunger, appreciation of friendship, idealization of art and contempt for money. Based on this topos, the most diverse real-world subcultures are often referred to as "bohemian" in a figurative sense, especially (but by no means exclusively) if they show traits of a precariat. This use of the word in the English language was imported from French ''La bohème'' in the mid-19th century and was used to describe the non-traditional lifestyles of artists, writers, journalists, musicians, and actors in major European c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1874 Births
Events January–March * January 1 – New York City annexes The Bronx. * January 2 – Ignacio María González becomes head of state of the Dominican Republic for the first time. * January 3 – Third Carlist War – Battle of Caspe: Campaigning on the Ebro in Aragon for the Spanish Republican Government, Colonel Eulogio Despujol surprises a Carlist force under Manuel Marco de Bello at Caspe, northeast of Alcañiz. In a brilliant action the Carlists are routed, losing 200 prisoners and 80 horses, while Despujol is promoted to Brigadier and becomes Conde de Caspe. * January 20 – The Pangkor Treaty (also known as the Pangkor Engagement), by which the British extended their control over first the Sultanate of Perak, and later the other independent Malay States, is signed. * January 23 **Alfred, Duke of Saxe-Coburg and Gotha, Prince Alfred, Duke of Edinburgh, second son of Queen Victoria, marries Grand Duchess Maria Alexandrovna of Russia, only daug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Bohumil Kučera (1874–1921)")
.jpg "Click for more on -> Bohemianism")
