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Panta Tutundžić
Panta S. Tutundžić (Belgrade, Kingdom of Serbia, 15 September 1900 - Belgrade, Yugoslavia. 21 August 1964) was a distinguished Serbian chemist professor and academic of SANU. Biography Panta Tutundžić attended elementary and realgymnasium in Belgrade. After two semesters of general grounding in science at the Department of Mechanical Engineering of the Technical University of Belgrade, he enrolled, in October 1920, at the Technische Hochschule in Berlin (now Technische Universität Berlin) with the main campus being located in the borough of Charlottenburg-Wilmersdorf. He graduated at this school at the beginning of 1925 and in the same year, after having defended his doctoral dissertation, he obtained the status of Doctor of Chemistry. He was a professor of physical chemistry and electrochemistry, at the Faculty of Technology, University of Belgrade, a corresponding member of SANU since 1958, and a full member since 1961. In the period from 1955 to 1962, he was the president ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belgrade
Belgrade is the Capital city, capital and List of cities in Serbia, largest city of Serbia. It is located at the confluence of the Sava and Danube rivers and at the crossroads of the Pannonian Basin, Pannonian Plain and the Balkan Peninsula. The population of the Belgrade metropolitan area is 1,685,563 according to the 2022 census. It is one of the Balkans#Urbanization, major cities of Southeast Europe and the List of cities and towns on the river Danube, third-most populous city on the river Danube. Belgrade is one of the List of oldest continuously inhabited cities, oldest continuously inhabited cities in Europe and the world. One of the most important prehistoric cultures of Europe, the Vinča culture, evolved within the Belgrade area in the 6th millennium BC. In antiquity, Thracians, Thraco-Dacians inhabited the region and, after 279 BC, Celts settled the city, naming it ''Singidunum, Singidūn''. It was Roman Serbia, conquered by the Romans under the reign of Augustus and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrochemistry
Electrochemistry is the branch of physical chemistry concerned with the relationship between Electric potential, electrical potential difference and identifiable chemical change. These reactions involve Electron, electrons moving via an electronically conducting phase (typically an external electrical circuit, but not necessarily, as in Electroless nickel-phosphorus plating, electroless plating) between electrodes separated by an ionically conducting and electronically insulating electrolyte (or ionic chemical species, species in a Solution (chemistry), solution). When a chemical reaction is driven by an electrical Voltage, potential difference, as in electrolysis, or if a potential difference results from a chemical reaction as in an electric battery or fuel cell, it is called an ''electrochemical'' reaction. Unlike in other chemical reactions, in electrochemical reactions electrons are not transferred directly between atoms, ions, or molecules, but via the aforementioned electron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1900 Births
As of March 1 ( O.S. February 17), when the Julian calendar acknowledged a leap day and the Gregorian calendar did not, the Julian calendar fell one day further behind, bringing the difference to 13 days until February 28 ( O.S. February 15), 2100. Summary Political and military The year 1900 was the end of the 19th century and the beginning of the 20th century. Two days into the new year, the U.S. Secretary of State John Hay announced the Open Door Policy regarding China, advocating for equal access for all nations to the Chinese market. The Galveston hurricane would become the deadliest natural disaster in United States history, killing between 6,000 and 12,000 people, mostly in and near Galveston, Texas, as well as leaving 10,000 people homeless, destroying 7,000 buildings of all kinds in Galveston. As of 2025, it remains the fourth deadliest Atlantic hurricane on record. An ongoing Boxer Rebellion in China escalates with multiple attacks by the Boxers on Chines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serbian Chemists
Serbian may refer to: * Pertaining to Serbia in Southeast Europe; in particular **Serbs, a South Slavic ethnic group native to the Balkans ** Serbian language ** Serbian culture **Demographics of Serbia, includes other ethnic groups within the country *Pertaining to other places **Serbia (other) **Sorbia (other) *Gabe Serbian (1977–2022), American musician See also * * * Sorbs * Old Serbian (other) Old Serbian may refer to: * someone or something related to the Old Serbia, a historical region * Old Serbian language, a general term for the pre-modern variants of Serbian language, including: ** the Serbian recension of Old Church Slavonic la ... {{Disambiguation Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Fischer Titration
In analytical chemistry, Karl Fischer titration is a classic titration method that uses coulometric or volumetric titration to determine trace amounts of water in a sample. It was invented in 1935 by the German chemist Karl Fischer. Today, the titration is done with an automated Karl Fischer titrator. Chemical principle The elementary reaction responsible for water quantification in the Karl Fischer titration is oxidation of sulfur dioxide () with iodine: : H2O + SO2 + I2 → SO3 + 2 HI This elementary reaction consumes exactly one molar equivalent of water vs. iodine. Iodine is added to the solution until it is present in excess, marking the end point of the titration, which can be detected by potentiometry. The reaction is run in an alcohol solution containing a base, which consumes the sulfur trioxide and hydroiodic acid produced. Coulometric titration The main compartment of the titration cell contains the anode solution plus the analyte. The anode solution consists of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permanganometry
Permanganometry is one of the techniques used in chemical quantitative analysis. It is a redox titration that involves the use of permanganates to measure the amount of analyte present in unknown chemical samples. It involves two steps, namely the titration of the analyte with potassium permanganate solution and then the standardization of potassium permanganate solution with standard sodium oxalate solution. The titration involves volumetric manipulations to prepare the analyte solutions. Permanganometry allows the detection and estimation of the quantitative presence of various chemical species, such as iron(II), manganese(II), oxalate, nitrite, and hydrogen peroxide. Reaction Depending on the conditions in which the titration is performed, the manganese is reduced from an oxidation of +7 to +2, +4, or +6. In most cases, permanganometry is performed in a very acidic solution in which the following electrochemical reaction occurs: : + 8 H+ + 5 e− → Mn2+ + 4 H2O; ''E''° = ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iodometry
Iodometry, known as iodometric titration, is a method of volumetric chemical analysis, a redox titration where the appearance or disappearance of elementary iodine Iodine is a chemical element; it has symbol I and atomic number 53. The heaviest of the stable halogens, it exists at standard conditions as a semi-lustrous, non-metallic solid that melts to form a deep violet liquid at , and boils to a vi ... indicates the end point. Note that iodometry involves indirect titration of iodine liberated by reaction with the analyte, whereas iodimetry involves direct titration using iodine as the titrant. Redox titration using sodium thiosulphate, (usually) as a reducing agent is known as iodometric titration since it is used specifically to titrate iodine. The iodometric titration is a general method to determine the concentration of an oxidising agent in solution. In an iodometric titration, a starch solution is used as an indicator since it can absorb the that is released, v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris
Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of cities in the European Union by population within city limits, fourth-most populous city in the European Union and the List of cities proper by population density, 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, culture, Fashion capital, fashion, and gastronomy. Because of its leading role in the French art, arts and Science and technology in France, sciences and its early adoption of extensive street lighting, Paris became known as the City of Light in the 19th century. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an official estimated population of 12,271,794 inhabitants in January 2023, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charlottenburg-Wilmersdorf
Charlottenburg-Wilmersdorf () is the fourth borough of Berlin, formed in an administrative reform with effect from 1 January 2001, by merging the former boroughs of Charlottenburg and Wilmersdorf. Overview Charlottenburg-Wilmersdorf covers the western city centre of Berlin and the adjacent affluent suburbs. It borders on the Mitte borough in the east, on Tempelhof-Schöneberg in the southeast, Steglitz-Zehlendorf in the south, Spandau in the west and on Reinickendorf in the north. The district includes the inner city localities of Charlottenburg, Wilmersdorf and Halensee. After World War II and the city's division by the Berlin Wall, the area around Kurfürstendamm and Bahnhof Zoo was the centre of former West Berlin, with the Kaiser Wilhelm Memorial Church as its landmark. The Technische Universität Berlin, the Berlin University of the Arts (''Universität der Künste''), the Federal Institute for Risk Assessment (''Bundesinstitut für Risikobewertung''), the Deu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingdom Of Serbia
The Kingdom of Serbia was a country located in the Balkans which was created when the ruler of the Principality of Serbia, Milan I of Serbia, Milan I, was proclaimed king in 1882. Since 1817, the Principality was ruled by the Obrenović dynasty (replaced by the Karađorđević dynasty for a short time). The Principality, under the suzerainty of the Ottoman Empire, ''de facto'' achieved full independence when the very last Ottoman troops left Belgrade in 1867. The Treaty of Berlin (1878), Congress of Berlin in 1878 recognized the formal independence of the Principality of Serbia, and in its composition Nišava District, Nišava, Pirot District, Pirot, Toplica District, Toplica and Vranje districts entered the Southern and Eastern Serbia, South part of Serbia. In 1882, Serbia was elevated to the status of a kingdom, maintaining a foreign policy friendly to Austria-Hungary. Between 1912 and 1913, Serbia greatly enlarged its territory through engagement in the First Balkan War, Fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Technische Universität Berlin
(TU Berlin; also known as Berlin Institute of Technology and Technical University of Berlin, although officially the name should not be translated) is a public university, public research university located in Berlin, Germany. It was the first German university to adopt the name "Technische Universität" (university of technology). The university alumni and staff includes several United States National Academies, US National Academies members, two National Medal of Science laureates, the creator of the first fully functional programmable (electromechanical) computer, Konrad Zuse, and ten Nobel Prize laureates. TU Berlin is a member of TU9, an incorporated society of the largest and most notable German institutes of technology and of the Top International Managers in Engineering network, which allows for student exchanges between leading engineering schools. It belongs to the Conference of European Schools for Advanced Engineering Education and Research. The TU Berlin is home of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Technische Hochschule
A ''Technische Hochschule'' (, plural: ''Technische Hochschulen'', abbreviated ''TH'') is a type of university focusing on engineering sciences in Germany. Previously, it also existed in Austria, Switzerland, the Netherlands (), and Finland (, ). In the 1970s (in Germany) and the 1980s (in the Netherlands), the ''Technische Hochschule'' emerged into the (German) or (Dutch). Since 2009, several German universities of applied sciences were renamed as . Terminology In German-language countries, the term ''Hochschule'' is more general than ''Universität'' (plural: ''Universitäten'') and also encompasses universities which do not have the right to confer doctorates and habilitations, in contrast to ''Universitäten''. Today, ''Universitäten'' as well as other ''Hochschulen'' call themselves ''Technische Hochschule'' for historical reasons. However, a ''Technische Hochschule'' with the status of a ''Universität'' is regarded as a ''Technische Universität'' despite the name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
