|
Soviet Scientists
Polymaths *Karl Ernst von Baer, polymath naturalist, formulated the geological Baer's law on river erosion and embryological Baer's laws, founder of the Russian Entomological Society, co-founder of the Russian Geographical Society *Alexander Borodin, chemist and composer, author of the famous opera ''Prince Igor'', discovered Borodin reaction, co-discovered Aldol reaction *Alexander Chizhevsky, interdisciplinary scientist, biophysicist, philosopher and artist, founder of heliobiology and modern air ionification, Russian cosmist *Johann Gottlieb Georgi, naturalist, chemist, mineralogist, ethnographer and explorer, the first to describe omul fish of Lake Baikal, Baikal, published the first full-scale work on ethnography of indigenous peoples of Russia *Mikhail Lomonosov, polymath scientist, artist and inventor; founder of the Moscow State University; proposed the law of conservation of matter; disproved the phlogiston theory; invented coaxial rotor and the first helicopter; invented ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voyages De La Commission Scientifique Du Nord, En Scandinavie, En Laponie, Au Spitzberg Et Aux Feröe - No-nb Digibok 2009040211001-118
Voyage(s) or The Voyage may refer to: Literature *''Voyage : A Novel of 1896'', Sterling Hayden * Voyage (novel), ''Voyage'' (novel), a 1996 science fiction novel by Stephen Baxter *''The Voyage'', Murray Bail * The Voyage (short story), "The Voyage" (short story), a 1921 story by Katherine Mansfield * "Voyage", a poem by Patti Smith from her 1996 book ''The Coral Sea (book), The Coral Sea'' * Voyages (poem), ''Voyages'' (poem), a 1926 poem by Hart Crane *Le Voyage, 1996 graphic novel, see Edmond Baudoin *Le Voyage, poem by Baudelaire Film and television * The Voyage (1921 film), ''The Voyage'' (1921 film), an Italian silent drama film * The Voyage (1974 film), ''The Voyage'' (1974 film), an Italian film * Voyage (2013 film), ''Voyage'' (2013 film), a Hong Kong film made mostly in English * Voyages (film), ''Voyages'' (film), a 1999 film directed by Emmanuel Finkiel * Voyage (1993 film), ''Voyage'' (1993 film), a 1993 American TV film directed by John Mackenzie * Voyage.tv, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omul
The omul, ''Coregonus migratorius'', also known as Baikal omul (), is a whitefish species of the salmon family endemic to Lake Baikal in Siberia, Russia. It is considered a delicacy and is the object of one of the largest commercial fisheries on Lake Baikal. Taxonomy The omul has traditionally been regarded as a subspecies of the Arctic cisco ''Coregonus autumnalis''. However, recent genetic studies have shown it actually belongs to the circumpolar ''Coregonus lavaretus- clupeaformis'' complex of lake whitefishes, which also has other members in Lake Baikal, and it is now considered its own species within '' Coregonus''. The four or five traditionally accepted subpopulations of omul within Lake Baikal are: North Baikal (северобайкальский), Selenga (селенгинский), Chivyrkui (чивыркуйский) and Posolsk (посольский). These vary in size, feeding behaviors and preferred spawning habitats. The extent of their reproductive isolation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organic Matter
Organic matter, organic material or natural organic matter is the large source of carbon-based compounds found within natural and engineered, terrestrial, and aquatic environments. It is matter composed of organic compounds that have come from the feces and remains of organisms such as plants and animals. Organic molecules can also be made by chemical reactions that do not involve life. Basic structures are created from cellulose, tannin, cutin, and lignin, along with other various proteins, lipids, and carbohydrates. Organic matter is very important in the movement of nutrients in the environment and plays a role in water retention on the surface of the planet. Formation Living organisms are composed of organic compounds. In life, they secrete or excrete organic material into their environment, shed body parts such as leaves and roots and after organisms die, their bodies are broken down by bacterial and fungal action. Larger molecules of organic matter can be formed from t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmosphere Of Venus
The atmosphere of Venus is the very dense layer of gases surrounding the planet Venus. Venus's atmosphere is composed of 96.5% carbon dioxide and 3.5% nitrogen, with other chemical compounds present only in trace amounts. It is much denser and hotter than atmosphere of Earth, that of Earth; the temperature at the surface is 740 Kelvin, K (467 °C, 872 °F), and the pressure is , roughly the pressure found under water on Earth. The atmosphere of Venus supports decks of opaque clouds of sulfuric acid that cover the entire planet, preventing optics, optical Earth-based and orbital observation of the surface. Information about surface topography has been obtained exclusively by radar imaging. Aside from the very surface layers, the atmosphere is in a state of vigorous circulation. The upper layer of troposphere exhibits a phenomenon of Atmospheric super-rotation, super-rotation, in which the atmosphere circles the planet in just four Earth days, much faster than the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Off-axis Reflecting Telescope
A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter objectives. Almost all of the major telescopes used in astronomy research are reflectors. Many variant forms are in use and some employ extra optical elements to improve image quality or place the image in a mechanically advantageous position. Since reflecting telescopes use mirrors, the design is sometimes referred to as a catoptric telescope. From the time of Newton to the 1800s, the mirror itself was made of metalusually speculum metal. This type included Newton's first designs and the largest telesco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Night Vision Telescope
Night vision is the ability to see in low-light conditions, either naturally with scotopic vision or through a night-vision device. Night vision requires both sufficient spectral range and sufficient intensity range. Humans have poor night vision compared to many animals such as cats, dogs, foxes and rabbits, in part because the human eye lacks a tapetum lucidum, tissue behind the retina that reflects light back through the retina thus increasing the light available to the photoreceptors. Types of ranges Spectral range Night-useful spectral range techniques can sense radiation that is invisible to a human observer. Human vision is confined to a small portion of the electromagnetic spectrum called visible light. Enhanced spectral range allows the viewer to take advantage of non-visible sources of electromagnetic radiation (such as near-infrared or ultraviolet radiation). Some animals such as the mantis shrimp and trout can see using much more of the infrared and/or ultraviolet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helicopter
A helicopter is a type of rotorcraft in which Lift (force), lift and thrust are supplied by horizontally spinning Helicopter rotor, rotors. This allows the helicopter to VTOL, take off and land vertically, to hover (helicopter), hover, and to fly forward, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of short take-off and landing (STOL) or short take-off and vertical landing (STOVL) aircraft cannot perform without a runway. The Focke-Wulf Fw 61 was the first successful, practical, and fully controllable helicopter in 1936, while in 1942, the Sikorsky R-4 became the first helicopter to reach full-scale mass production, production. Starting in 1939 and through 1943, Igor Sikorsky worked on the development of the Vought-Sikorsky VS-300, VS-300, which over four iterations, became the basis for modern helicopters with a single main rotor and a single tail rotor. Although most earlier ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coaxial Rotor
A coaxial-rotor aircraft is an aircraft whose rotors are mounted one above the other on concentric shafts, with the same axis of rotation, but turning in opposite directions ( contra-rotating). This rotor configuration is a feature of helicopters produced by the Russian Kamov helicopter design bureau. History The idea of coaxial rotors originates with Mikhail Lomonosov. He had developed a small helicopter model with coaxial rotors in July 1754 and demonstrated it to the Russian Academy of Sciences. In 1859, the British Patent Office awarded the first helicopter patent to Henry Bright for his coaxial design. From this point, coaxial helicopters developed into fully operational machines as we know them today. Two pioneering helicopters, the Corradino D'Ascanio-built "D'AT3" of 1930, and the generally more successful French mid-1930s '' Gyroplane Laboratoire'', both used coaxial rotor systems for flight. Design considerations Having two coaxial sets of rotors provides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phlogiston Theory
The phlogiston theory, a superseded scientific theory, postulated the existence of a fire-like element dubbed phlogiston () contained within combustible bodies and released during combustion. The name comes from the Ancient Greek (''burning up''), from (''flame''). The idea of a substance was first proposed in 1667 by Johann Joachim Becher and later put together more formally in 1697 by Georg Ernst Stahl. Phlogiston theory attempted to explain chemical processes such as combustion and rusting, now collectively known as oxidation. The theory was challenged by the concomitant mass increase and was abandoned before the end of the 18th century following experiments by Antoine Lavoisier in the 1770s and by other scientists. Phlogiston theory led to experiments that ultimately resulted in the identification (), and naming (1777), of oxygen by Joseph Priestley and Antoine Lavoisier, respectively. Theory Phlogiston theory states that ''phlogisticated'' substances contain phlo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conservation Of Matter
In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter the mass of the system must remain constant over time. The law implies that mass can neither be created nor destroyed, although it may be rearranged in space, or the entities associated with it may be changed in form. For example, in chemical reactions, the mass of the chemical components before the reaction is equal to the mass of the components after the reaction. Thus, during any chemical reaction and low-energy thermodynamic processes in an isolated system, the total mass of the reactants, or starting materials, must be equal to the mass of the products. The concept of mass conservation is widely used in many fields such as chemistry, mechanics, and fluid dynamics. Historically, mass conservation in chemical reactions was primarily demonstrated in the 17th century and finally confirmed by Antoine Lavoisier in the late 18th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moscow State University
Moscow State University (MSU), officially M. V. Lomonosov Moscow State University,. is a public university, public research university in Moscow, Russia. The university includes 15 research institutes, 43 faculties, more than 300 departments, and six branches. Alumni of the university include past leaders of the Soviet Union and other governments. As of 2019, 13 List of Nobel laureates, Nobel laureates, six Fields Medal winners, and one Turing Award winner were affiliated with the university. History Imperial Moscow University Ivan Shuvalov and Mikhail Lomonosov promoted the idea of a university in Moscow, and Elizabeth of Russia, Russian Empress Elizabeth decreed its establishment on . The first lectures were given on . Saint Petersburg State University and MSU each claim to be Russia's oldest university. Though Moscow State University was founded in 1755, St. Petersburg which has had a continuous existence as a "university" since 1819 sees itself as the successor of an a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikhail Lomonosov
Mikhail Vasilyevich Lomonosov (; , ; – ) was a Russian polymath, scientist and writer, who made important contributions to literature, education, and science. Among his discoveries were the atmosphere of Venus and the law of conservation of mass in chemical reactions. His spheres of science were natural science, chemistry, physics, mineralogy, history, art, philology, optical devices and others. The founder of modern geology,Vernadsky, V. (1911) Pamyati M.V. Lomonosova. Zaprosy zhizni, 5: 257-262 (in Russian) n memory of M.V. Lomonosov/ref> Lomonosov was also a poet and influenced the formation of the modern Russian literary language. Early life and family Lomonosov was born in the village of Mishaninskaya, later renamed Lomonosovo in his honor, in Archangelgorod Governorate, on an island not far from Kholmogory, in the far north of Russia. His father, Vasily Dorofeyevich Lomonosov, was a prosperous peasant fisherman turned ship owner, who amassed a small fortune trans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
