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Alfonso L. Herrera
Alfonso Luis Herrera (1868 – 1942) was a Mexican biologist, author, educator and founder of several institutions in Mexico City. He conducted research into the origin of life in an attempt to develop a new, experimental science which he called plasmogeny. Biography Herrera was born in Mexico City, the son of a well-known naturalist. He studied pharmacy at the National School of Medicine, graduating in 1889 by which time he had already published several papers in Zoology and Ornithology. He became a teacher at the National Preparatory School (''Escuela Nacional Preparatoria''), the Military School and the "Normal School for Teachers" (''Escuela Normal para Maestros'') in Mexico. He also helped to found the Botanical Garden of Chapultepec Park (1922), Mexico City Zoo (1923 - now called Chapultepec Zoo), and the Biological Institute of the University of Mexico. Herrera died in Mexico City in 1943. Ideas He developed an experimental science called plasmogeny, concerned with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexico City
Mexico City ( es, link=no, Ciudad de México, ; abbr.: CDMX; Nahuatl: ''Altepetl Mexico'') is the capital and largest city of Mexico, and the most populous city in North America. One of the world's alpha cities, it is located in the Valley of Mexico within the high Mexican central plateau, at an altitude of . The city has 16 boroughs or ''demarcaciones territoriales'', which are in turn divided into neighborhoods or ''colonias''. The 2020 population for the city proper was 9,209,944, with a land area of . According to the most recent definition agreed upon by the federal and state governments, the population of Greater Mexico City is 21,804,515, which makes it the sixth-largest metropolitan area in the world, the second-largest urban agglomeration in the Western Hemisphere (behind São Paulo, Brazil), and the largest Spanish language, Spanish-speaking city (city proper) in the world. Greater Mexico City has a gross domestic product, GDP of $411 billion in 2011, which makes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gasoline
Gasoline (; ) or petrol (; ) (see ) is a transparent, petroleum-derived flammable liquid that is used primarily as a fuel in most spark-ignited internal combustion engines (also known as petrol engines). It consists mostly of organic compounds obtained by the fractional distillation of petroleum, enhanced with a variety of additives. On average, U.S. refineries produce, from a barrel of crude oil, about 19 to 20 gallons of gasoline; 11 to 13 gallons of distillate fuel (most of which is sold as diesel fuel); and 3 to 4 gallons of jet fuel. The product ratio depends on the processing in an oil refinery and the crude oil assay. A barrel of oil is defined as holding 42 US gallons, which is about 159 liters or 35 imperial gallons. The characteristic of a particular gasoline blend to resist igniting too early (which causes knocking and reduces efficiency in reciprocating engines) is measured by its octane rating, which is produced in several grades. Tetraethyl lead and o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1942 Deaths
Year 194 ( CXCIV) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Septimius and Septimius (or, less frequently, year 947 ''Ab urbe condita''). The denomination 194 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 * Emperor Septimius Severus and Decimus Clodius Septimius Albinus Caesar become Roman Consuls. * Battle of Issus: Septimius Severus marches with his army (12 legions) to Cilicia, and defeats Pescennius Niger, Roman governor of Syria. Pescennius retreats to Antioch, and is executed by Severus' troops. * Septimius Severus besieges Byzantium (194–196); the city walls suffer extensive damage. Asia * Battle of Yan Province: Warlords Cao Cao and Lü Bu fight for control over Yan Province; the battle lasts for over 100 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientists From Mexico City
A scientist is a person who conducts scientific research to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. Though Thales (circa 624-545 BC) was arguably the first scientist for describing how cosmic events may be seen as natural, not necessarily caused by gods,Frank N. Magill''The Ancient World: Dictionary of World Biography'', Volume 1 Routledge, 2003 it was not until the 19th century that the term ''scientist'' came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833. In modern times, many scientists have advanced degrees in an area of science and pursue careers in various sectors of the economy such as academia, industry, government, and nonprofit environments.'''' History The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexican Biologists
Mexican may refer to: Mexico and its culture *Being related to, from, or connected to the country of Mexico, in North America ** People *** Mexicans, inhabitants of the country Mexico and their descendants *** Mexica, ancient indigenous people of the Valley of Mexico ** Being related to the State of Mexico, one of the 32 federal entities of Mexico ** Culture of Mexico *** Mexican cuisine *** historical synonym of Nahuatl, language of the Nahua people (including the Mexica) Arts and entertainment * "The Mexican" (short story), by Jack London * "The Mexican" (song), by the band Babe Ruth * Regional Mexican, a Latin music radio format Films * ''The Mexican'' (1918 film), a German silent film * ''The Mexican'' (1955 film), a Soviet film by Vladimir Kaplunovsky based on the Jack London story, starring Georgy Vitsin * ''The Mexican'', a 2001 American comedy film directed by Gore Verbinski, starring Brad Pitt and Julia Roberts Other uses * USS ''Mexican'' (ID-1655), United State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulphobes
A sulphobe is a film composed of formaldehyde and thiocyanates alleged to have lifelike properties. Sulphobes were a subject in the researches of Alfonso L. Herrera, a biologist who studied the origin of life In biology, abiogenesis (from a- 'not' + Greek bios 'life' + genesis 'origin') or the origin of life is the natural process by which life has arisen from non-living matter, such as simple organic compounds. The prevailing scientific hypothes .... References Further reading * * Evolutionarily significant biological phenomena Evolutionary biology Origin of life {{chemistry-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lampropeltis Zonata
Zonata was a Swedish power metal band originating from Borås. They formed in 1998 and recorded three albums with label Century Media before calling a split up in 2003. Their lyrics draw heavily on mythology and life struggles. They are known by most for their heavy drums and cutting guitar riffs.Rivadavia, Eduardo"Zonata Biography" AllMusic AllMusic (previously known as All Music Guide and AMG) is an American online music database. It catalogs more than three million album entries and 30 million tracks, as well as information on musicians and bands. Initiated in 1991, the databas .... Retrieved 2013-08-07. Members Final lineup *Johannes Nyberg - vocals and keyboards *John Nyberg - guitar *Niclas Karlsson - guitar *Mattias Asplund - bass *Mikael Hornqvist - drums Former *Johan Elving - bass (1998–1999) *Daniel Dalhqvist - drums (1998) *Henrik Carlsson - guitar (1998–2000) The band broke up in 2003 when Johannes Nyberg and John Nyberg left the band. Discograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barisia
''Barisia'' is a genus of lizards in the family Anguidae. The genus is endemic to Mexico. Species The following species are recognized as being valid."''Barisia'' ". The Reptile Database. www.reptile-database.org. http://reptile-database.reptarium.cz/advanced_search?genus=Barisia&submit=Search *'' Barisia ciliaris'' – Sierra alligator lizard, imbricate alligator lizard *'' Barisia herrerae'' – Herrera's alligator lizard *'' Barisia imbricata'' – imbricate alligator lizard, transvolcanic alligator lizard *'' Barisia jonesi'' – imbricate alligator lizard *''Barisia levicollis'' – Chihuahuan alligator lizard *'' Barisia planifrons'' – Oaxaca alligator lizard *'' Barisia rudicollis'' – rough-necked alligator lizard ''Nota bene'': A binomial authority In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinosternon Herrerai
Herrera's mud turtle (''Kinosternon herrerai'') is a species of mud turtle in the family Kinosternidae. The species is endemic to Mexico. Etymology The specific name, ''herrerai'', is in honor of Mexican biologist Alfonso Luis Herrera. Life history Based on a 1988 study of a population near Rancho Nuevo in Tamaulipas, Mexico, the males of ''K. herrerai'' attain a larger size than females, with a proportionally smaller plastron, and narrower and shallower carapace. Symbionts reported include a balanomorph barnacle, leeches of the genus ''Phcobdelta'', and the filamentous green alga Basichdia. The food items identified indicate an omnivorous diet, with wild figs the major plant component, and several insect orders and millipedes represented. Courtship in ''K. herrerai'' agrees in most respects with courtship of other kinosternid species. Sexual maturity in females is apparently attained between 115 and 130 mm carapace length. Clutch size is estimated to range from 2-4. Seve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thiocyanate
Thiocyanate (also known as rhodanide) is the anion . It is the conjugate base of thiocyanic acid. Common derivatives include the colourless salts potassium thiocyanate and sodium thiocyanate. Mercury(II) thiocyanate was formerly used in pyrotechnics. Thiocyanate is analogous to the cyanate ion, , wherein oxygen is replaced by sulfur. is one of the pseudohalides, due to the similarity of its reactions to that of halide ions. Thiocyanate used to be known as rhodanide (from a Greek word for rose) because of the red colour of its complexes with iron. Thiocyanate is produced by the reaction of elemental sulfur or thiosulfate with cyanide: : 8 CN- + S8 -> 8 SCN- : CN- + S2O3^2- -> SCN- + SO3^2- The second reaction is catalyzed by thiosulfate sulfurtransferase, a hepatic mitochondrial enzyme, and by other sulfur transferases, which together are responsible for around 80% of cyanide metabolism in the body. Biological chemistry of thiocyanate in medicine Thiocyanate is known to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sodium Hydroxide
Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations and hydroxide anions . Sodium hydroxide is a highly caustic base and alkali that decomposes proteins at ordinary ambient temperatures and may cause severe chemical burns. It is highly soluble in water, and readily absorbs moisture and carbon dioxide from the air. It forms a series of hydrates . The monohydrate crystallizes from water solutions between 12.3 and 61.8 °C. The commercially available "sodium hydroxide" is often this monohydrate, and published data may refer to it instead of the anhydrous compound. As one of the simplest hydroxides, sodium hydroxide is frequently used alongside neutral water and acidic hydrochloric acid to demonstrate the pH scale to chemistry students. Sodium hydroxide is used in many industries: in the manufacture of pulp and paper, textiles, drinking water, soaps and deterge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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