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Tomas Batuecas
Tomás Batuecas Marugán (1893–1972) was a Spanish chemist, most notable for his work on atomic weights of the elements. Batuecas was a professor of chemistry and vice-chancellor of the University of Santiago de Compostela. Life He graduated with honors from the Faculty of Sciences at the University of Salamanca in 1913 and in the same year began doctoral studies in Madrid under Blas Cabrera Felipe. In 1916, Batuecas studied in the University of Geneva with Philippe A. Guye where he was interested in density and compressibility of real gases. In Geneva he also met Enrique Moles Ormella, who became his long-standing research colleague. In 1917, he presented his doctoral thesis at the University of Madrid and then returned for a brief period to the University of Geneva to teach chemistry. On his return to the Complutense University of Madrid, he continued his work on properties of gases with Cabrera and Moles. In 1932, Batuecas joined the University of Santiago, where he remaine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aldeanueva Del Camino
Aldeanueva del Camino is a municipality located in the province of Cáceres, Extremadura, Spain. According to the 2006 census (INE INE, Ine or ine may refer to: Institutions * Institut für Nukleare Entsorgung, a German nuclear research center * Instituto Nacional de Estadística (other) * Instituto Nacional de Estatística (other) * Instituto Nacional Elec ...), the municipality has a population of 830 inhabitants. References Municipalities in the Province of Cáceres {{Extremadura-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atomic Weight
Relative atomic mass (symbol: ''A''; sometimes abbreviated RAM or r.a.m.), also known by the deprecated synonym atomic weight, is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant. The atomic mass constant (symbol: ''m'') is defined as being of the mass of a carbon-12 atom. Since both quantities in the ratio are masses, the resulting value is dimensionless; hence the value is said to be ''relative''. For a single given sample, the relative atomic mass of a given element is the weighted arithmetic mean of the masses of the individual atoms (including their isotopes) that are present in the sample. This quantity can vary substantially between samples because the sample's origin (and therefore its radioactive history or diffusion history) may have produced unique combinations of isotopic abundances. For example, due to a different mixture of stable carbon-12 and carbon-13 isoto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Salamanca Alumni
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. Universities typically offer both undergraduate and postgraduate programs. In the United States, the designation is reserved for colleges that have a graduate school. The word ''university'' is derived from the Latin ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". The first universities were created in Europe by Catholic Church monks. The University of Bologna (''Università di Bologna''), founded in 1088, is the first university in the sense of: *Being a high degree-awarding institute. *Having independence from the ecclesiastic schools, although conducted by both clergy and non-clergy. *Using the word ''universitas'' (which was coined at its foundation). *Issuing secular and non-secular degrees: grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spanish Chemists
Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Canada * Spanish River (other), the name of several rivers * Spanish Town, Jamaica Other uses * John J. Spanish (1922–2019), American politician * "Spanish" (song), a single by Craig David, 2003 See also * * * Español (other) * Spain (other) * España (other) * Espanola (other) * Hispania, the Roman and Greek name for the Iberian Peninsula * Hispanic, the people, nations, and cultures that have a historical link to Spain * Hispanic (other) * Hispanism * Spain (other) * National and regional identity in Spain * Culture of Spain * Spanish Fort (other) Spanish Fort or Old Spanish Fort may refer to: United States * Spanish Fort, Alabama, a city * Spanish Fort (Colorado ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1972 Deaths
Year 197 ( CXCVII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Magius and Rufinus (or, less frequently, year 950 '' Ab urbe condita''). The denomination 197 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 * February 19 – Battle of Lugdunum: Emperor Septimius Severus defeats the self-proclaimed emperor Clodius Albinus at Lugdunum (modern Lyon). Albinus commits suicide; legionaries sack the town. * Septimius Severus returns to Rome and has about 30 of Albinus's supporters in the Senate executed. After his victory he declares himself the adopted son of the late Marcus Aurelius. * Septimius Severus forms new naval units, manning all the triremes in Italy with heavily armed troops for war in the East. His soldiers embark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1893 Births
Events January–March * January 2 – Webb C. Ball introduces railroad chronometers, which become the general railroad timepiece standards in North America. * Mark Twain started writing Puddn'head Wilson. * January 6 – The Washington National Cathedral is chartered by Congress; the charter is signed by President Benjamin Harrison. * January 13 ** The Independent Labour Party of the United Kingdom has its first meeting. ** U.S. Marines from the ''USS Boston'' land in Honolulu, Hawaii, to prevent the queen from abrogating the Bayonet Constitution. * January 15 – The ''Telefon Hírmondó'' service starts with around 60 subscribers, in Budapest. * January 17 – Overthrow of the Kingdom of Hawaii: Lorrin A. Thurston and the Citizen's Committee of Public Safety in Hawaii, with the intervention of the United States Marine Corps, overthrow the government of Queen Liliuokalani. * January 21 ** The Cherry Sisters first perform in Marion, Iowa. ** The T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Union Of Pure And Applied Chemistry
The International Union of Pure and Applied Chemistry (IUPAC ) is an international federation of National Adhering Organizations working for the advancement of the chemical sciences, especially by developing nomenclature and terminology. It is a member of the International Science Council (ISC). IUPAC is registered in Zürich, Switzerland, and the administrative office, known as the "IUPAC Secretariat", is in Research Triangle Park, North Carolina, United States. This administrative office is headed by IUPAC's executive director, currently Lynn Soby. IUPAC was established in 1919 as the successor of the International Congress of Applied Chemistry for the advancement of chemistry. Its members, the National Adhering Organizations, can be national chemistry societies, national academies of sciences, or other bodies representing chemists. There are fifty-four National Adhering Organizations and three Associate National Adhering Organizations. IUPAC's Inter-divisional Committee on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commission On Isotopic Abundances And Atomic Weights
The Commission on Isotopic Abundances and Atomic Weights (CIAAW) is an international scientific committee of the International Union of Pure and Applied Chemistry (IUPAC) under its Division of Inorganic Chemistry. Since 1899, it is entrusted with periodic critical evaluation of atomic weights of chemical elements and other cognate data, such as the isotopic composition of elements. The biennial CIAAW Standard Atomic Weights are accepted as the authoritative source in science and appear worldwide on the periodic table wall charts. The use of CIAAW Standard Atomic Weights is also required legally, for example, in calculation of calorific value of natural gas (ISO 6976:1995), or in gravimetric preparation of primary reference standards in gas analysis (ISO 6142:2006). In addition, until 2019 the definition of kelvin, the SI unit for thermodynamic temperature, made direct reference to the isotopic composition of oxygen and hydrogen as recommended by CIAAW. The latest CIAAW report ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon-12
Carbon-12 (12C) is the most abundant of the two stable isotopes of carbon (carbon-13 being the other), amounting to 98.93% of element carbon on Earth; its abundance is due to the triple-alpha process by which it is created in stars. Carbon-12 is of particular importance in its use as the standard from which atomic masses of all nuclides are measured, thus, its atomic mass is exactly 12 daltons by definition. Carbon-12 is composed of 6 protons, 6 neutrons, and 6 electrons. History Before 1959, both the IUPAP and IUPAC used oxygen to define the mole; the chemists defining the mole as the number of atoms of oxygen which had mass 16 g, the physicists using a similar definition but with the oxygen-16 isotope only. The two organizations agreed in 1959/60 to define the mole as follows. ''Mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 12 gram of carbon 12; its symbol is "mol".'' This was adopted by the CIPM (Inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X-ray Crystallography
X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles and intensities of these diffracted beams, a crystallographer can produce a three-dimensional picture of the density of electrons within the crystal. From this electron density, the mean positions of the atoms in the crystal can be determined, as well as their chemical bonds, their crystallographic disorder, and various other information. Since many materials can form crystals—such as salts, metals, minerals, semiconductors, as well as various inorganic, organic, and biological molecules—X-ray crystallography has been fundamental in the development of many scientific fields. In its first decades of use, this method determined the size of atoms, the lengths and types of chemical bonds, and the atomic-scale differences among various mat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enrique Moles Ormella
Enrique Moles Ormella (26 August 1883 – 30 March 1953) was a Spanish pharmacist, physicist, and chemist, most notable for his work on atomic weights of the elements. Enrique Moles is considered one of the foremost Spanish chemists of his time. Life Early life Enrique Moles was born on 26 August 1883 in Vila de Gràcia near Barcelona to Pedro Moles Alrich and Maria Ormella Figuerola, both of which died while he was still infant. Studies Moles obtained the bachelor's degree from Colegio Iberico in Barcelona, and in 1900 he entered to study pharmacy at the Complutense University of Madrid. In 1906 he obtained the Doctor of Pharmacy. In 1909 Moles went to study in the University of Munich and in 1910 he attended the University of Leipzig to work on determination of atomic weights under Dr. K. Drucker. In 1916, Moles studied with Prof. Philippe A. Guye at the University of Geneva to establish the atomic weight of bromine, and he received the degree Doctor of Physics from the Univer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santiago De Compostela
Santiago de Compostela is the capital of the autonomous community of Galicia, in northwestern Spain. The city has its origin in the shrine of Saint James the Great, now the Cathedral of Santiago de Compostela, as the destination of the Way of St. James, a leading Catholic pilgrimage route since the 9th century. In 1985, the city's Old Town was designated a UNESCO World Heritage Site. Santiago de Compostela has a very mild climate for its latitude with heavy winter rainfall courtesy of its relative proximity to the prevailing winds from Atlantic low-pressure systems. Toponym ''Santiago'' is the local Galician evolution of Vulgar Latin ''Sanctus Iacobus'' " Saint James". According to legend, ''Compostela'' derives from the Latin ''Campus Stellae'' (i.e., "field of the star"); it seems unlikely, however, that this phrase could have yielded the modern ''Compostela'' under normal evolution from Latin to Medieval Galician. Other etymologies derive the name from Latin ''compositum'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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