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Konstantin Gedroits
Konstantin Kaetanovich Gedroits (Russian: Константин Каэтанович Гедройц; 25 March 1872 – 5 October 1932) was a Russians, Russian soil science, soil scientist of Lithuanian origins. He was a full member of the Academy of Sciences of the Soviet Union and a president of the International Union of Soil Sciences (1927–1930). Biography Gedroits belonged to the Lithuanian aristocratic Giedroyć family. He was born in Bessarabia, which was then part of the Russian Empire. He studied in Saint Petersburg, where he graduated from the Forest Institute in 1897 and from the Saint Petersburg Imperial University in 1903. After that he led the chemistry laboratory of the :ru:Почвенный институт имени В. В. Докучаева, Dokuchaev Soil Institute in Moscow (1915–17) and the Department of Soil Science of the Forest Institute in Saint Petersburg (1917–30). In 1929–30 he headed the Dokuchaev Soil Institute, and in 1927 was elected as pres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Russian Encyclopedia
The ''Great Russian Encyclopedia'' (GRE; russian: Большая российская энциклопедия, БРЭ, transliterated as ''Bolshaya rossiyskaya entsiklopediya'' or academically as ''Bolšaja rossijskaja enciklopedija'') is a universal Russian encyclopedia, completed in 36 volumes, published between 2004 and 2017 by Great Russian Encyclopedia, JSC (russian: Большая российская энциклопедия ПАО, transliterated as ''Bolshaya rossiyskaya entsiklopediya PAO''). It is released under the auspices of the Russian Academy of Sciences (RAS) after President Vladimir Putin signed a presidential decree №1156 in 2002. The complete edition was released by 2017. The chief editor of the encyclopedia is Yury Osipov, the president of the RAS. The editorial board has more than 80 RAS members, including the Nobel Prize laureates Zhores Alferov and Vitaly Ginzburg. The first, introductory volume, released in 2004, is dedicated to Russia. Thirty-fiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colloid
A colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance. Some definitions specify that the particles must be dispersed in a liquid, while others extend the definition to include substances like aerosols and gels. The term colloidal suspension refers unambiguously to the overall mixture (although a narrower sense of the word ''suspension'' is distinguished from colloids by larger particle size). A colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). The dispersed phase particles have a diameter of approximately 1 nanometre to 1 micrometre. Some colloids are translucent because of the Tyndall effect, which is the scattering of light by particles in the colloid. Other colloids may be opaque or have a slight color. Colloidal suspensions are the subject of interface and colloid science. This field of study was introduced in 1845 by Itali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologists From The Russian Empire
A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other terrestrial planets, as well as the processes that shape them. Geologists usually study geology, earth science, or geophysics, although backgrounds in physics, chemistry, biology, and other sciences are also useful. Field research (field work) is an important component of geology, although many subdisciplines incorporate laboratory and digitalized work. Geologists can be classified in a larger group of scientists, called geoscientists. Geologists work in the energy and mining sectors searching for natural resources such as petroleum, natural gas, precious and base metals. They are also in the forefront of preventing and mitigating damage from natural hazards and disasters such as earthquakes, volcanoes, tsunamis and landslides. Their studies are used to warn the general public of the occurrence of these events. Geologists are also important contributors to climate chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1872 Births
Year 187 ( CLXXXVII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Quintius and Aelianus (or, less frequently, year 940 '' Ab urbe condita''). The denomination 187 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Septimius Severus marries Julia Domna (age 17), a Syrian princess, at Lugdunum (modern-day Lyon). She is the youngest daughter of high-priest Julius Bassianus – a descendant of the Royal House of Emesa. Her elder sister is Julia Maesa. * Clodius Albinus defeats the Chatti, a highly organized German tribe that controlled the area that includes the Black Forest. By topic Religion * Olympianus succeeds Pertinax as bishop of Byzantium (until 198). Births * Cao Pi, Chinese emperor of the Cao Wei state (d. 226) * G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1932 Deaths
Year 193 ( CXCIII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Sosius and Ericius (or, less frequently, year 946 ''Ab urbe condita''). The denomination 193 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * January 1 – Year of the Five Emperors: The Roman Senate chooses Publius Helvius Pertinax, against his will, to succeed the late Commodus as Emperor. Pertinax is forced to reorganize the handling of finances, which were wrecked under Commodus, to reestablish discipline in the Roman army, and to suspend the food programs established by Trajan, provoking the ire of the Praetorian Guard. * March 28 – Pertinax is assassinated by members of the Praetorian Guard, who storm the imperial palace. The Empire is auctioned off ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Outstanding People Of Pridnestrovie
The rubla ( ro, рублэ, rublă, , plural ruble; russian: wikt:рубль, рубль) is the currency of Transnistria and is divided into 100 ''kopecks''. It is also known as the rouble in Commonwealth English or ruble in American English. Since Transnistria is a polity with List of states with limited recognition#Non-UN member states recognised only by non-UN members, no credible international recognition and formally part of Moldova, its currency has no ISO 4217 code. However, unofficially some Transnistrian organisations, such as Agroprombank and Gazprombank (Transnistria), Gazprombank, used the code PRB, a code reserved for Puerto Rico (ISO 3166-1 country code "PR"). The Transnistrian Republican Bank sometimes uses the code RUP, a code reserved for Russia (ISO 3166-1 country code "RU"). First rubla (1994) Soviet banknotes were used in the Pridnestrovian Moldavian Republic after its formation in 1990. When the former Soviet republics began issuing their own currencies, Tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transnistria
Transnistria, officially the Pridnestrovian Moldavian Republic (PMR), is an unrecognised breakaway state that is internationally recognised as a part of Moldova. Transnistria controls most of the narrow strip of land between the Dniester river and the Moldovan–Ukrainian border, as well as some land on the other side of the river's bank. Its capital and largest city is Tiraspol. Transnistria has been recognised only by three other unrecognised or partially recognised breakaway states: Abkhazia, Artsakh and South Ossetia. Transnistria is officially designated by the Republic of Moldova as the Administrative-Territorial Units of the Left Bank of the Dniester ( ro, Unitățile Administrativ-Teritoriale din stînga Nistrului) or as ("Left Bank of the Dniester"). The Council of Europe considers the territory to be under military occupation by Russia. The region's origins can be traced to the Moldavian Autonomous Soviet Socialist Republic, which was formed in 1924 within th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transnistrian Republican Bank
The Transnistrian Republican Bank (russian: Приднестровский республиканский банк, Pridnestrovskiy respublikanskiy bank) is the central bank of Transnistria. It issues its own currency, the Transnistrian rubla and also a series of memorial gold and silver coins, among them ''The Outstanding People of Pridnestrovie''. In October 2006, the bank inaugurated a new headquarters of a size of in Tiraspol Tiraspol or Tirișpolea ( ro, Tiraspol, Moldovan Cyrillic: Тираспол, ; russian: Тира́споль, ; uk, Тирасполь, Tyraspol') is the capital of Transnistria (''de facto''), a breakaway state of Moldova, where it is the th .... Chairmen of the Pridnestrovian Republican Bank * Vyatcheslav Zagryadsky ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gypsum
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula . It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard or sidewalk chalk, and drywall. Alabaster, a fine-grained white or lightly tinted variety of gypsum, has been used for sculpture by many cultures including Ancient Egypt, Mesopotamia, Ancient Rome, the Byzantine Empire, and the Nottingham alabasters of Medieval England. Gypsum also crystallizes as translucent crystals of selenite. It forms as an evaporite mineral and as a hydration product of anhydrite. The Mohs scale of mineral hardness defines gypsum as hardness value 2 based on scratch hardness comparison. Etymology and history The word ''gypsum'' is derived from the Greek word (), "plaster". Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum (calcined gypsum) used for various purposes, this dehydrated gypsum became known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liming (soil)
Liming is the application (to soil) of calcium- (Ca) and magnesium (Mg)-rich materials in various forms, including marl, chalk, limestone, burnt lime or hydrated lime. In acid soils, these materials react as a base and neutralize soil acidity. This often improves plant growth and increases the activity of soil bacteria, but oversupply may result in harm to plant life. Liming can also improve aggregate stability on clay soils. For this purpose structure lime, products containing calcium oxide (CaO) or hydroxide (Ca(OH)2) in mixes with calcium carbonate (CaCO3), are often used. Structure liming can reduce losses of clay and nutrients from soil aggregates. The degree to which a given amount of lime per unit of soil volume will increase soil pH depends on the buffer capacity of the soil (this is generally related to soil cation exchange capacity or CEC). Soils with low CEC will usually show a more marked pH increase than soils with high CEC. But the low-CEC soils will witness more r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sodium
Sodium is a chemical element with the symbol Na (from Latin ''natrium'') and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23Na. The free metal does not occur in nature, and must be prepared from compounds. Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and halite (NaCl). Many salts of sodium are highly water-soluble: sodium ions have been leached by the action of water from the Earth's minerals over eons, and thus sodium and chlorine are the most common dissolved elements by weight in the oceans. Sodium was first isolated by Humphry Davy in 1807 by the electrolysis of sodium hydroxide. Among many other useful sodium compounds, sodium hydroxide (lye) is used in soap manufacture, and sodium chloride (edible salt) is a de-icing agent and a nutrient for animals including h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcium
Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust, and the third most abundant metal, after iron and aluminium. The most common calcium compound on Earth is calcium carbonate, found in limestone and the fossilised remnants of early sea life; gypsum, anhydrite, fluorite, and apatite are also sources of calcium. The name derives from Latin ''calx'' "lime", which was obtained from heating limestone. Some calcium compounds were known to the ancients, though their chemistry was unknown until the seventeenth century. Pure calcium was isolated in 1808 via electrolysis of its oxide by Humphry Davy, who named the element. Calcium compounds are widely used in many industries: in foods and pharma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
