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Mosaic Gold
Mosaic gold or bronze powder refers to tin(IV) sulfide as used as a pigment in bronzing and gilding wood and metal work. It is obtained as a yellow scaly crystalline powder. The alchemists referred to it as aurum musivum, or aurum mosaicum. The term mosaic gold has also been used to refer to ormolu and to cut shapes of gold leaf, some darkened for contrast, arranged as a mosaic. The term bronze powder may also refer to powdered bronze alloy. A recipe for mosaic gold is already provided in the 3th century A.D. treatise ''Baopuzi'', composed by the Chinese alchemist Ge Hong. The earliest sources for its preparation in Europe, under the name ''porporina'' or ''purpurina'', are the late 13th-century North Italian '' Liber colorum secundum Magistrum Bernardum'' and Cennino Cennini's ''Libro dell'arte'' from the 1420s. Instructions became more widespread and varied thereafter, the around 1500 recipe collection '' Liber illuministarum'' from Tegernsee Abbey in Bavaria alone offering six ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giovanni Segantini - The Angel Of Life - Google Art Project
Giovanni may refer to: * Giovanni (name), an Italian male given name and surname * Giovanni (meteorology), a Web interface for users to analyze NASA's gridded data * ''Don Giovanni'', a 1787 opera by Wolfgang Amadeus Mozart, based on the legend of Don Juan * Giovanni (Pokémon), boss of Team Rocket in the fictional world of Pokémon * Giovanni (World of Darkness) ''Vampire: The Masquerade'' is a tabletop role-playing game (tabletop RPG), created by Mark Rein-Hagen and released in 1991 by White Wolf Publishing, as the first of several Storyteller System games for its World of Darkness setting line. I ..., a group of vampires in ''Vampire: The Masquerade/World of Darkness'' roleplay and video game * "Giovanni", a song by Band-Maid from the 2021 album ''Unseen World'' * ''Giovanni's Island'', a 2014 Japanese anime drama film * ''Giovanni's Room'', a 1956 novel by James Baldwin * Via Giovanni, places in Rome See also * * *Geovani *Giovanni Battista *San Giovanni (disambigu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tegernsee Abbey
Tegernsee Abbey ( German ''Kloster Tegernsee'' or ''Abtei Tegernsee'') is a former Benedictine monastery in the town and district of Tegernsee in Bavaria. Both the abbey and the town that grew up around it are named after the Tegernsee, the lake on the shores of which they are located. The name is from the Old High German ''tegarin seo'', meaning ''great lake''. Tegernsee Abbey, officially known as St. Quirinus Abbey for its patron saint St.Quirinus, was first built in the 8th century. Until 1803, it was the most important Benedictine community in Bavaria. Today, the monastery buildings are known as Tegernsee Castle (''Schloss Tegernsee'') and are in the possession of Prince Max, Duke in Bavaria, a member of the Wittelsbach family. The local Catholic parish church of Saint Quirinus is in the former abbey church. In addition to the private quarters of the ducal couple, the former abbey premises now accommodate the Tegernsee Grammar School (''Gymnasium Tegernsee'') and the well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tin(IV) Compounds
Tin is a chemical element; it has chemical symbol, symbol Sn () and atomic number 50. A silvery-colored metal, tin is soft enough to be cut with little force, and a bar of tin can be bent by hand with little effort. When bent, a bar of tin makes a sound, the so-called "tin cry", as a result of crystal twinning, twinning in tin crystals. Tin is a post-transition metal in Carbon group, group 14 of the periodic table of elements. It is obtained chiefly from the mineral cassiterite, which contains tin(IV) oxide, stannic oxide, . Tin shows a chemical similarity to both of its neighbors in group 14, germanium and lead, and has two main oxidation states, +2 and the slightly more stable +4. Tin is the 49th most abundance of the chemical elements, abundant element on Earth, making up 0.00022% of its crust, and with 10 stable isotopes, it has the largest number of stable isotopes in the periodic table, due to its magic number (physics), magic number of protons. It has two main allotrop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alchemical Substances
Alchemical Studies produced a number of substances, which were later classified as particular Chemical Compounds or mixture of compounds. Many of these terms were in common use into the 20th century. Metals and metalloids * Antimony/ – Sb * Bismuth () – Bi * Copper/ – associated with Venus. Cu * Gold/ – associated with the Sun. Au * Iron/ – associated with Mars. Fe * Lead/ – associated with Saturn. Pb * Quicksilver/ – associated with Mercury. Hg * Silver/ – associated with the Moon. Ag * Tin/ – associated with Jupiter. Sn Minerals, Stones, and Pigments * Bluestone – Mineral form of Copper(II) Sulfate Pentahydrate, also called Blue Vitriol. * Borax – Sodium Borate; was also used to refer to other related minerals. * Cadmia/Tuttia/Tutty – Probably Zinc Carbonate. * Calamine – Zinc Carbonate. * Calomel/Horn Quicksilver/Horn Mercury – Mercury(I) Chloride, a very poisonous purgative formed by subliming a mixture of Mercuric Chloride and Metallic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Visual Arts Materials
The visual system is the physiological basis of visual perception (the ability to detect and process light). The system detects, transduces and interprets information concerning light within the visible range to construct an image and build a mental model of the surrounding environment. The visual system is associated with the eye and functionally divided into the optical system (including cornea and lens) and the neural system (including the retina and visual cortex). The visual system performs a number of complex tasks based on the ''image forming'' functionality of the eye, including the formation of monocular images, the neural mechanisms underlying stereopsis and assessment of distances to (depth perception) and between objects, motion perception, pattern recognition, accurate motor coordination under visual guidance, and colour vision. Together, these facilitate higher order tasks, such as object identification. The neuropsychological side of visual information ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inorganic Pigments
An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemistry''. Inorganic compounds comprise most of the Earth's crust, although the compositions of the deep mantle remain active areas of investigation. All allotropes (structurally different pure forms of an element) and some simple carbon compounds are often considered inorganic. Examples include the allotropes of carbon (graphite, diamond, buckminsterfullerene, graphene, etc.), carbon monoxide , carbon dioxide , carbides, and salts of inorganic anions such as carbonates, cyanides, cyanates, thiocyanates, isothiocyanates, etc. Many of these are normal parts of mostly organic systems, including organisms; describing a chemical as inorganic does not necessarily mean that it cannot occur within living things. History Friedrich Wöhler's conv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Inorganic Pigments
The following list includes commercially or artistically important inorganic pigments of natural and synthetic origin.. Purple pigments Aluminosilicate pigments * Ultramarine violet (): a synthetic or naturally occurring sulfur containing silicate mineral. Copper pigments * Han purple: BaCuSi2O6. Cobalt pigments * Cobalt violet (): Co3(PO4)2. Manganese pigments * Manganese violet: NH4MnP2O7 () manganic ammonium pyrophosphate. Blue pigments Aluminosilicate pigments * Ultramarine (): a synthetic or naturally occurring sulfur containing silicate mineral - (generalized formula) * Persian blue: made by grinding up the mineral Lapis lazuli. The most important mineral component of lapis lazuli is lazurite (25% to 40%), a feldspathoid silicate mineral with the formula . Cobalt pigments *Cobalt blue (): cobalt(II) aluminate. * Cerulean blue (): cobalt(II) stannate. * Cerium uranium blue Iron pigments * Prussian blue (): a synthetic inert pigment made of iron and cyanide: C18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convulsion
A convulsion is a medical condition where the body muscles contract and relax rapidly and repeatedly, resulting in uncontrolled shaking. Because epileptic seizures typically include convulsions, the term ''convulsion'' is often used as a synonym for ''seizure''. However, not all epileptic seizures result in convulsions, and not all convulsions are caused by epileptic seizures. Non-epileptic convulsions have no relation with epilepsy, and are caused by non-epileptic seizures. Convulsions can be caused by epilepsy, infections (including a severe form of listeriosis which is caused by eating food contaminated by Listeria monocytogenes), brain trauma, or other medical conditions. They can also occur from an electric shock or improperly enriched air for scuba diving. The word ''fit'' is sometimes used to mean a convulsion or epileptic seizure. Signs and symptoms A person having a convulsion may experience several different symptoms, such as a brief blackout, confusion, drooling, l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrass
A matrass (mod. Latin ''matracium''), also known as a bolthead, is a glass vessel with a round or oval body and a long narrow neck, used in chemistry as a digester or distiller. The Florence flask is frequently used for this purpose. The word is possibly identical with the old name ''matrass'' ( Fr. ''materas, matelas''), meaning the bolt or quarrel of a crossbow. If so, some identity of shape is the reason for the application of the word. Another connection is suggested with the Arabic ''matra'', a leather bottle. References * See also * Laboratory flask Laboratory flasks are vessels or containers that fall into the category of laboratory equipment known as glassware. In laboratory and other scientific settings, they are usually referred to simply as flasks. Flasks come in a number of shapes an ... External links * {{Cite web , url=https://mhs.web.ox.ac.uk/collections-online#/item/hsm-catalogue-7293 , title=Matrass or Bolt-Head Distillation Apparatus, Early 19th Century , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sublimation (physics)
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. The verb form of sublimation is ''sublime'', or less preferably, ''sublimate''. ''Sublimate'' also refers to the product obtained by sublimation. The point at which sublimation occurs rapidly (for further details, see below) is called critical sublimation point, or simply sublimation point. Notable examples include sublimation of dry ice at room temperature and atmospheric pressure, and that of solid iodine with heating. The reverse process of sublimation is ''deposition'' (also called ''desublimation''), in which a substance passes directly from a gas to a solid phase, without passing through the liquid state. Technically, all solids may sublime, though most sublime at extremely low rates that are hardly detectable under usual conditions. At normal pressures, most chemical compounds and elements possess three different states at different ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur
Sulfur ( American spelling and the preferred IUPAC name) or sulphur ( Commonwealth spelling) is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with the chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most abundant element by mass in the universe and the fifth most common on Earth. Though sometimes found in pure, native form, sulfur on Earth usually occurs as sulfide and sulfate minerals. Being abundant in native form, sulfur was known in ancient times, being mentioned for its uses in ancient India, ancient Greece, China, and ancient Egypt. Historically and in literature sulfur is also called brimstone, which means "burning stone". Almost all elemental sulfur is produced as a byproduct of removing sulfur-containing contaminants from natural gas and petroleum.. Downloahere Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sal Ammoniac
Salammoniac, also sal ammoniac or salmiac, is a rare naturally occurring mineral composed of ammonium chloride, NH4Cl. It forms colorless, white, or yellow-brown crystals in the Cubic (crystal system), isometric-hexoctahedral class. It has very poor Cleavage (crystal), cleavage and is brittle to conchoidal fracture. It is quite soft, with a Mohs hardness of 1.5 to 2, and it has a low specific gravity of 1.5. It is water-soluble. Salammoniac is also the archaism, archaic name for the chemical compound ammonium chloride. History Pliny the Elder, Pliny, in Book XXXI of his ''Natural History (Pliny), Natural History'', refers to a salt produced in the Roman province of Crete and Cyrenaica, Cyrenaica named ''hammoniacum'', so called because of its proximity to the nearby Temple of Amun, Jupiter Amun (Greek language, Greek Ἄμμων ''Ammon''). However, the description Pliny gives of the salt does not conform to the properties of ammonium chloride. According to Herbert Hoover, Herb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
