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Charles Janet
Charles Janet (; 15 June 1849 – 7 February 1932) was a French engineer, company director, inventor and biologist. He is also known for his innovative ''left-step'' presentation of the periodic table of chemical elements. Life and work Janet graduated from the École des Mines and worked for some years in munitions. He then married the daughter of the owner of a manufacturing company and worked for it for the rest of his life, finding time for research in various branches of science. His collection of 40,000 fossils and other specimens was unfortunately dispersed after his death. His studies of the morphology of the head of ants, wasps and bees, and his micrographs were of remarkable quality. He also worked on plant biology and finally wrote a series of papers on evolution. He was a prolific inventor and designed much of his own equipment, including the formicarium, in which an ant colony is made visible by being formed between two panes of glass. In 1927 he turned his attention ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portrait De Charles Janet Vers 1925
A portrait is a painting, photograph, sculpture, or other artistic representation of a person, in which the face and its expressions are predominant. The intent is to display the likeness, personality, and even the mood of the person. For this reason, in photography a portrait is generally not a snapshot, but a composed image of a person in a still position. A portrait often shows a person looking directly at the painter or photographer, in order to most successfully engage the subject with the viewer. History Prehistorical portraiture Plastered human skulls were reconstructed human skulls that were made in the ancient Levant between 9000 and 6000 BC in the Pre-Pottery Neolithic B period. They represent some of the oldest forms of art in the Middle East and demonstrate that the prehistoric population took great care in burying their ancestors below their homes. The skulls denote some of the earliest sculptural examples of portraiture in the history of art. Historical portraitur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eric Scerri
Eric R. Scerri is a chemist, writer and philosopher of science of Maltese origin. He is a lecturer at the University of California, Los Angeles; and the founder and editor-in-chief of '' Foundations of Chemistry'', an international peer reviewed journal covering the history and philosophy of chemistry, and chemical education.Rocke A 2012,A place at the periodic table' ''The Times Higher Education Supplement,'' 15 AugustUCLA Department of Chemistry and Biochemistry 2013, 'Scerri, Eric R.', University of California. For current biographical information see the home page oEric Scerri/ref> He is a world authority on the history and philosophy of the periodic table and is the author and editor of several books in this and related fields.Sella A 2013,An elementary history lesson' ''New Scientist,'' 13 August Scerri was a participant in the 2014 PBS documentary film, '' The Mystery of Matter''. Scerri attended Walpole Grammar School in Ealing. He received his BSc from Westfield Colleg ... [...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] |
Verdon Gorge
The Verdon Gorge ( French: ''Gorges du Verdon'') is a river canyon located in the Provence-Alpes-Côte d'Azur region of Southeastern France. It is about 25 km (15.5 mi) long and up to 700 metres (0.4 mi) deep. It was formed by the Verdon River, which is named for its turquoise-green colour, one of the location's distinguishing characteristics. In between the towns of Castellane and Moustiers-Sainte-Marie, the river has cut a ravine to a depth of 700 meters through the limestone mass. At the end of the canyon, the Verdon flows into the artificial Lake of Sainte-Croix. The gorge is very popular with tourists, who can drive around its rim, rent kayaks to travel on the river, or hike. The limestone walls, which are several hundreds of metres high, attract many rock climbers. It is considered an outstanding destination for multi-pitch climbing, with 1,500 routes available ranging from 20 metres (65 feet) to over 400 metres (1,300 feet). History During the Triassic per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Société Entomologique De France
The Société entomologique de France, or French Entomological Society, is devoted to the study of insects. The society was founded in 1832 in Paris, France. The society was created by eighteen Parisian entomologists on January 31, 1832. The first (honorary) president was Pierre André Latreille (1762-1833) who was elected unanimously and established the goal of the society to contribute to and progress the development of entomology in all its aspects. The main publications of the society are ''Bulletin de la Société entomologique de France'', ''Annales de la Société entomologique de France Annals are a concise form of historical writing which record events chronologically, year by year. The equivalent word in Latin and French is ''annales'', which is used untranslated in English in various contexts. List of works with titles contai ...'' and, for a few years, ''L'Entomologiste, Revue d'Amateurs''. The library contains 15,000 volumes and 1,500 titles of old or current literat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidopterist
Lepidopterology ()) is a branch of entomology concerning the scientific study of moths and the three superfamilies of butterflies. Someone who studies in this field is a lepidopterist or, archaically, an aurelian. Origins Post-Renaissance, the rise of the "lepidopterist" can be attributed to the expanding interest in science, nature and the surroundings. When Linnaeus wrote the tenth edition of the '' Systema Naturae'' in 1758, there was already "a substantial body of published work on Lepidopteran natural history" (Kristensen, 1999). These included: * ''Insectorum sive Minimorum Animalium Theatrum'' – Thomas Mouffet (1634) * ''Metamorphosis Naturalis'' – Jan Goedart (1662–67 ) * ''Metamorphosis insectorum Surinamensium'' – Maria S. Merian (1705), whose work included illustrated accounts of European Lepidoptera * ''Historia Insectorum'' – John Ray (1710) * ''Papilionum Brittaniae icones'' – James Petiver (1717) History Scholars 1758–1900 was the era of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Alabama Press
The University of Alabama Press is a university press founded in 1945 and is the scholarly publishing arm of the University of Alabama. An editorial board composed of representatives from all doctoral degree granting public universities within Alabama oversees the publishing program. Projects are selected that support, extend, and preserve academic research. The Press also publishes books that foster an understanding of the history and culture of this state and region. The Press strives to publish works in a wide variety of formats such as print, electronic, and on-demand technologies to ensure that the works are widely available. As the only academic publisher for the state of Alabama, The University of Alabama Press has in the past undertaken publishing partnerships with such institutions as the Birmingham Museum of Art and Samford University, and The College of Agriculture, the Jule Collins Smith Museum of Fine Art, and the Pebble Hill Center for the Humanities at Auburn Univ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward G
Edward is an English given name. It is derived from the Anglo-Saxon name ''Ēadweard'', composed of the elements '' ēad'' "wealth, fortune; prosperous" and '' weard'' "guardian, protector”. History The name Edward was very popular in Anglo-Saxon England, but the rule of the Norman and Plantagenet dynasties had effectively ended its use amongst the upper classes. The popularity of the name was revived when Henry III named his firstborn son, the future Edward I, as part of his efforts to promote a cult around Edward the Confessor, for whom Henry had a deep admiration. Variant forms The name has been adopted in the Iberian peninsula since the 15th century, due to Edward, King of Portugal, whose mother was English. The Spanish/Portuguese forms of the name are Eduardo and Duarte. Other variant forms include French Édouard, Italian Edoardo and Odoardo, German, Dutch, Czech and Romanian Eduard and Scandinavian Edvard. Short forms include Ed, Eddy, Eddie, Ted, Teddy and Ned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Positron
The positron or antielectron is the antiparticle or the antimatter counterpart of the electron. It has an electric charge of +1 '' e'', a spin of 1/2 (the same as the electron), and the same mass as an electron. When a positron collides with an electron, annihilation occurs. If this collision occurs at low energies, it results in the production of two or more photons. Positrons can be created by positron emission radioactive decay (through weak interactions), or by pair production from a sufficiently energetic photon which is interacting with an atom in a material. History Theory In 1928, Paul Dirac published a paper proposing that electrons can have both a positive and negative charge. This paper introduced the Dirac equation, a unification of quantum mechanics, special relativity, and the then-new concept of electron spin to explain the Zeeman effect. The paper did not explicitly predict a new particle but did allow for electrons having either positive or negative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heavy Hydrogen
Deuterium (or hydrogen-2, symbol or deuterium, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium, or hydrogen-1). The nucleus of a deuterium atom, called a deuteron, contains one proton and one neutron, whereas the far more common protium has no neutrons in the nucleus. Deuterium has a natural abundance in Earth's oceans of about one atom of deuterium among all atoms of hydrogen (see heavy water). Thus deuterium accounts for approximately 0.0156% by number (0.0312% by mass) of all the naturally occurring hydrogen in the oceans, while protium accounts for more than 99.98%. The abundance of deuterium changes slightly from one kind of natural water to another (see Vienna Standard Mean Ocean Water). (Tritium is yet another hydrogen isotope, with two neutrons, that is far more rare and is radioactive.) The name ''deuterium'' is derived from the Greek , meaning "second", to denote the two particles composing the nucleus. Deuteriu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-matter
In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding particles in "ordinary" matter. Antimatter occurs in natural processes like cosmic ray collisions and some types of radioactive decay, but only a tiny fraction of these have successfully been bound together in experiments to form antiatoms. Minuscule numbers of antiparticles can be generated at particle accelerators; however, total artificial production has been only a few nanograms. No macroscopic amount of antimatter has ever been assembled due to the extreme cost and difficulty of production and handling. Theoretically, a particle and its antiparticle (for example, a proton and an antiproton) have the same mass, but opposite electric charge, and other differences in quantum numbers. A collision between any particle and its anti-particle partner leads to their mutual annihilation, giving rise to various proportions of intense photons (gamma rays), neutrinos, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discovery Of The Neutron
The discovery of the neutron and its properties was central to the extraordinary developments in atomic physics in the first half of the 20th century. Early in the century, Ernest Rutherford developed a crude model of the atom, based on the gold foil experiment of Hans Geiger and Ernest Marsden. In this model, atoms had their mass and positive electric charge concentrated in a very small nucleus. By 1920 chemical isotopes had been discovered, the atomic masses had been determined to be (approximately) integer multiples of the mass of the hydrogen atom, and the atomic number had been identified as the charge on the nucleus.Byrne, J. ''Neutrons, Nuclei, and Matter'', Dover Publications, Mineola, New York, 2011, Throughout the 1920s, the nucleus was viewed as composed of combinations of protons and electrons, the two elementary particles known at the time, but that model presented several experimental and theoretical contradictions. The essential nature of the atomic nucleus w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
