Basu basu no mi

El otro día escuché una discusión, yo no era parte activa de ella, tan solo escuchaba, en silencio. El tema era delicado, la discusión era acalorada y cuando yo pude dar mi opinión, las palabras se atascaron en mi garganta, porque era tanto lo que tenía que decir que no sabía por dónde empezar. Y el tiempo paso igual que mi oportunidad de hablar.

what will it be????
mine will be bari bari no mi/yomi yomi no mi/goro goro no mi/gura gura no mi/

Resulta que, mientras estábamos en el velorio de mi primo, quien se suicidó, un tipo pasó gritando frente a la casa "tan bonita que es la vida, ni loco me la quito". Para morir asesinado apenas 5 minutos después.
Aquí la versión larga. Mi primo, básicamente mi hermano, era una persona con problemas, que lamentablemente no recibió la ayuda que necesitaba, y al final se quitó la vida. Yo estaba destrozado, y evité estar en el velorio lo más que pude. Pues, mentras estaba frente a la casa pasó este individuo, quien era bastante conocido por consumir drogas, y gritó lo de que la vida es bonita entre otras tantas cosas. Lo que a mí más me molestó fue esa frase así que es la que mejor recuerdo. Y todo eso ocurrió mientras él se dirigía a comprar drogas en una casa a una cuadra de dónde nosotros estábamos.
Resulta que, cuando llegó a dónde vendían drogas, justo cuando él llegó, llegaron unas personas armadas a matar a otro de los que estaban adentro del lugar y, por cuestiones de la vida, mataron a otros 4 aparte del objetivo principal. Entre esos 4 estaba el sujeto en cuestión.
Todo esto ocurrió apenas a unos 5 minutos despues de soltar su frase, yo lo escuché decir esa barbaridad y también escuché los disparos, y me parece una de las mayores ironías que haya visto.

Lo malo de trabajar en una agencia de asistencia domiciliar es que soy yo mismo el que se encarga de todo el transporte de una casa a otra. Hoy no he tenido mucha suerte en este caso debido al accidente que ha ocurrido mientras viajaba entre casa. Es algo que se produce con mucha frecuencia, ya que a menudo frecuento los barrios menos desarrollado de mi ciudad y tienden a albergar industrias pesadas. Además, las carreteras no son de buena calidad, llenas de baches y objetos punzantes por todas partes. Odio que mi agencia no me ayude a reemplazar las llantas que he perdido durante toda mi estancia en el empleo, pero bueno, el dueño y mi jefa sí me habían avisado de esto antes de que firmara yo el contrato.
Desafortunadamente, mi marido no ha podido ayudarme porque estaba en el trabajo. Tampoco he podido contar con mi hermana ni con mi cuñada porque las dos estaban demasiado lejos del lugar en donde yo estaba. De todos modos, he tenido que conducir hasta el taller mecánico más próximo para que me hayan cambiado la llanta lo más rápido posible. Los mecánicos mexicanos me trataban bien y me han reemplazado la llanta dentro de veinte minutos, pero por desgracia, he necesitado reprogramar algunas citas con mis pacientes como consecuencia de la llanta punchada. Esto me ha hecho pensar en los beneficios de las otras agencias más establecidas desde hace mucho tiempo que ofrecen a sus empleados, como un coche de empresa que el trabajador necesita alquilar a la agencia.
En cualquier caso, estoy pensando en comprar llantas extras y ponerlas en el maletero a fin de que no sea necesario que vaya al taller mecánico siempre y cuando esto acontezca. La primera vez que esto pasó conmigo, estaba fuera y una comunidad desconocida me rodeaba en aquel momento. Yo tenía tanto miedo que casi abandoné mi coche porque hubo denuncias de delitos e informes de tiroteos en el mismo complejo residencial. Sin embargo, la adrenalina me empujó a arreglar el problema muy rápido. Mañana voy al vendedor de neumáticos de confianza que mi cuñada me había recomendado una vez para comprarme dos, o quizás tres, llantas extras.

Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium radioactively decays by emitting an alpha particle. The half-life of this decay varies between 159,200 and 4.5 billion years for different isotopes, making them useful for dating the age of the Earth. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.[6] Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons. However, because of the tiny concentrations found in nature, uranium needs to undergo enrichment so that enough uranium-235 is present. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is studied for future industrial use in nuclear technology. Uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons; uranium-235, and to a lesser degree uranium-233, have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating.[7][8]
The 1789 discovery of uranium in the mineral pitchblende is credited to Martin Heinrich Klaproth, who named the new element after the recently discovered planet Uranus. Eugène-Melchior Péligot was the first person to isolate the metal and its radioactive properties were discovered in 1896 by Henri Becquerel. Research by Otto Hahn, Lise Meitner, Enrico Fermi and others, such as J. Robert Oppenheimer starting in 1934 led to its use as a fuel in the nuclear power industry and in Little Boy, the first nuclear weapon used in war. An ensuing arms race during the Cold War between the United States and the Soviet Union produced tens of thousands of nuclear weapons that used uranium metal and uranium-derived plutonium-239. Dismantling of these weapons and related nuclear facilities is carried out within various nuclear disarmament programs and costs billions of dollars. Weapon-grade uranium obtained from nuclear weapons is diluted with uranium-238 and reused as fuel for nuclear reactors. The development and deployment of these nuclear reactors continue on a global base as they are powerful sources of CO2-free energy. Spent nuclear fuel forms radioactive waste, which mostly consists of uranium-238 and poses significant health threat and environmental impact. Uranium is a silvery white, weakly radioactive metal. It has a Mohs hardness of 6, sufficient to scratch glass and approximately equal to that of titanium, rhodium, manganese and niobium. It is malleable, ductile, slightly paramagnetic, strongly electropositive and a poor electrical conductor.[9][10] Uranium metal has a very high density of 19.1 g/cm3,[11] denser than lead (11.3 g/cm3),[12] but slightly less dense than tungsten and gold (19.3 g/cm3).[13][14]
Uranium metal reacts with almost all non-metal elements (with the exception of the noble gases) and their compounds, with reactivity increasing with temperature.[15] Hydrochloric and nitric acids dissolve uranium, but non-oxidizing acids other than hydrochloric acid attack the element very slowly.[9] When finely divided, it can react with cold water; in air, uranium metal becomes coated with a dark layer of uranium oxide.[10] Uranium in ores is extracted chemically and converted into uranium dioxide or other chemical forms usable in industry.
Uranium-235 was the first isotope that was found to be fissile. Other naturally occurring isotopes are fissionable, but not fissile. On bombardment with slow neutrons, its uranium-235 isotope will most of the time divide into two smaller nuclei, releasing nuclear binding energy and more neutrons. If too many of these neutrons are absorbed by other uranium-235 nuclei, a nuclear chain reaction occurs that results in a burst of heat or (in special circumstances) an explosion. In a nuclear reactor, such a chain reaction is slowed and controlled by a neutron poison, absorbing some of the free neutrons. Such neutron absorbent materials are often part of reactor control rods (see nuclear reactor physics for a description of this process of reactor control).
As little as 15 lb (6.8 kg) of uranium-235 can be used to make an atomic bomb.[16] The nuclear weapon detonated over Hiroshima, called Little Boy, relied on uranium fission. However, the first nuclear bomb (the Gadget used at Trinity) and the bomb that was detonated over Nagasaki (Fat Man) were both plutonium bombs.
Uranium metal has three allotropic forms:[17]
α (orthorhombic) stable up to 668 °C (1,234 °F). Orthorhombic, space group No. 63, Cmcm, lattice parameters a = 285.4 pm, b = 587 pm, c = 495.5 pm.[18] β (tetragonal) stable from 668 to 775 °C (1,234 to 1,427 °F). Tetragonal, space group P42/mnm, P42nm, or P4n2, lattice parameters a = 565.6 pm, b = c = 1075.9 pm.[18] γ (body-centered cubic) from 775 °C (1,427 °F) to melting point—this is the most malleable and ductile state. Body-centered cubic, lattice parameter a = 352.4 pm.[18]
The major application of uranium in the military sector is in high-density penetrators. This ammunition consists of depleted uranium (DU) alloyed with 1–2% other elements, such as titanium or molybdenum.[19] At high impact speed, the density, hardness, and pyrophoricity of the projectile enable the destruction of heavily armored targets. Tank armor and other removable vehicle armor can also be hardened with depleted uranium plates. The use of depleted uranium became politically and environmentally contentious after the use of such munitions by the US, UK and other countries during wars in the Persian Gulf and the Balkans raised questions concerning uranium compounds left in the soil[8][20][21][22] (see Gulf War syndrome).[16]
Depleted uranium is also used as a shielding material in some containers used to store and transport radioactive materials. While the metal itself is radioactive, its high density makes it more effective than lead in halting radiation from strong sources such as radium.[9] Other uses of depleted uranium include counterweights for aircraft control surfaces, as ballast for missile re-entry vehicles and as a shielding material.[10] Due to its high density, this material is found in inertial guidance systems and in gyroscopic compasses.[10] Depleted uranium is preferred over similarly dense metals due to its ability to be easily machined and cast as well as its relatively low cost.[23] The main risk of exposure to depleted uranium is chemical poisoning by uranium oxide rather than radioactivity (uranium being only a weak alpha emitter).
During the later stages of World War II, the entire Cold War, and to a lesser extent afterwards, uranium-235 has been used as the fissile explosive material to produce nuclear weapons. Initially, two major types of fission bombs were built: a relatively simple device that uses uranium-235 and a more complicated mechanism that uses plutonium-239 derived from uranium-238. Later, a much more complicated and far more powerful type of fission/fusion bomb (thermonuclear weapon) was built, that uses a plutonium-based device to cause a mixture of tritium and deuterium to undergo nuclear fusion. Such bombs are jacketed in a non-fissile (unenriched) uranium case, and they derive more than half their power from the fission of this material by fast neutrons from the nuclear fusion process.[24]
The main use of uranium in the civilian sector is to fuel nuclear power plants. One kilogram of uranium-235 can theoretically produce about 20 terajoules of energy (2×1013 joules), assuming complete fission; as much energy as 1.5 million kilograms (1,500 tonnes) of coal.[7]
Commercial nuclear power plants use fuel that is typically enriched to around 3% uranium-235.[7] The CANDU and Magnox designs are the only commercial reactors capable of using unenriched uranium fuel. Fuel used for United States Navy reactors is typically highly enriched in uranium-235 (the exact values are classified). In a breeder reactor, uranium-238 can also be converted into plutonium through the following reaction:[10]
Before (and, occasionally, after) the discovery of radioactivity, uranium was primarily used in small amounts for yellow glass and pottery glazes, such as uranium glass and in Fiestaware.[25]
The discovery and isolation of radium in uranium ore (pitchblende) by Marie Curie sparked the development of uranium mining to extract the radium, which was used to make glow-in-the-dark paints for clock and aircraft dials.[26][27] This left a prodigious quantity of uranium as a waste product, since it takes three tonnes of uranium to extract one gram of radium. This waste product was diverted to the glazing industry, making uranium glazes very inexpensive and abundant. Besides the pottery glazes, uranium tile glazes accounted for the bulk of the use, including common bathroom and kitchen tiles which can be produced in green, yellow, mauve, black, blue, red and other colors.
Uranium was also used in photographic chemicals (especially uranium nitrate as a toner),[10] in lamp filaments for stage lighting bulbs,[28] to improve the appearance of dentures,[29] and in the leather and wood industries for stains and dyes. Uranium salts are mordants of silk or wool. Uranyl acetate and uranyl formate are used as electron-dense "stains" in transmission electron microscopy, to increase the contrast of biological specimens in ultrathin sections and in negative staining of viruses, isolated cell organelles and macromolecules.
The discovery of the radioactivity of uranium ushered in additional scientific and practical uses of the element. The long half-life of the isotope uranium-238 (4.47×109 years) makes it well-suited for use in estimating the age of the earliest igneous rocks and for other types of radiometric dating, including uranium–thorium dating, uranium–lead dating and uranium–uranium dating. Uranium metal is used for X-ray targets in the making of high-energy X-rays.[10]
The use of uranium in its natural oxide form dates back to at least the year 79 CE, when it was used in the Roman Empire to add a yellow color to ceramic glazes.[10] Yellow glass with 1% uranium oxide was found in a Roman villa on Cape Posillipo in the Bay of Naples, Italy, by R. T. Gunther of the University of Oxford in 1912.[30] Starting in the late Middle Ages, pitchblende was extracted from the Habsburg silver mines in Joachimsthal, Bohemia (now Jáchymov in the Czech Republic), and was used as a coloring agent in the local glassmaking industry.[31] In the early 19th century, the world's only known sources of uranium ore were these mines. Mining for uranium in the Ore Mountains ceased on the German side after the Cold War ended and SDAG Wismut was wound down. On the Czech side there were attempts during the uranium price bubble of 2007 to restart mining, but those were quickly abandoned following a fall in uranium prices.[32][33]
The discovery of the element is credited to the German chemist Martin Heinrich Klaproth. While he was working in his experimental laboratory in Berlin in 1789, Klaproth was able to precipitate a yellow compound (likely sodium diuranate) by dissolving pitchblende in nitric acid and neutralizing the solution with sodium hydroxide.[31] Klaproth assumed the yellow substance was the oxide of a yet-undiscovered element and heated it with charcoal to obtain a black powder, which he thought was the newly discovered metal itself (in fact, that powder was an oxide of uranium).[31][34] He named the newly discovered element after the planet Uranus (named after the primordial Greek god of the sky), which had been discovered eight years earlier by William Herschel.[35]
In 1841, Eugène-Melchior Péligot, Professor of Analytical Chemistry at the Conservatoire National des Arts et Métiers (Central School of Arts and Manufactures) in Paris, isolated the first sample of uranium metal by heating uranium tetrachloride with potassium.[31][36]
Henri Becquerel discovered radioactivity by using uranium in 1896.[15] Becquerel made the discovery in Paris by leaving a sample of a uranium salt, K2UO2(SO4)2 (potassium uranyl sulfate), on top of an unexposed photographic plate in a drawer and noting that the plate had become "fogged".[37] He determined that a form of invisible light or rays emitted by uranium had exposed the plate.
During World War I when the Central Powers suffered a shortage of molybdenum to make artillery gun barrels and high speed tool steels they routinely substituted ferrouranium alloys which present many of the same physical characteristics. When this practice became known in 1916 the USA government requested several prominent universities to research these uses for uranium and tools made with these formulas remained in use for several decades only ending when the Manhattan Project and the Cold War placed a large demand on uranium for fission research and weapon development.[38][39][40]
A team led by Enrico Fermi in 1934 observed that bombarding uranium with neutrons produces the emission of beta rays (electrons or positrons from the elements produced; see beta particle).[41] The fission products were at first mistaken for new elements with atomic numbers 93 and 94, which the Dean of the Faculty of Rome, Orso Mario Corbino, christened ausonium and hesperium, respectively.[42][43][44][45] The experiments leading to the discovery of uranium's ability to fission (break apart) into lighter elements and release binding energy were conducted by Otto Hahn and Fritz Strassmann[41] in Hahn's laboratory in Berlin. Lise Meitner and her nephew, the physicist Otto Robert Frisch, published the physical explanation in February 1939 and named the process "nuclear fission".[46] Soon after, Fermi hypothesized that the fission of uranium might release enough neutrons to sustain a fission reaction. Confirmation of this hypothesis came in 1939, and later work found that on average about 2.5 neutrons are released by each fission of the rare uranium isotope uranium-235.[41] Fermi urged Alfred O. C. Nier to separate uranium isotopes for determination of the fissile component, and on 29 February 1940, Nier used an instrument he built at the University of Minnesota to separate the world's first uranium-235 sample in the Tate Laboratory. After mailed to Columbia University's cyclotron, John Dunning confirmed the sample to be the isolated fissile material on 1 March.[47] Further work found that the far more common uranium-238 isotope can be transmuted into plutonium, which, like uranium-235, is also fissile by thermal neutrons. These discoveries led numerous countries to begin working on the development of nuclear weapons and nuclear power. Despite fission having been discovered in Germany, the Uranverein ("uranium club") Germany's wartime project to research nuclear power and/or weapons was hampered by limited resources, infighting, the exile or non-involvement of several prominent scientists in the field and several crucial mistakes such as failing to account for impurities in available graphite samples which made it appear less suitable as a neutron moderator than it is in reality. Germany's attempts to build a natural uranium / heavy water reactor had not come close to reaching criticality by the time the Americans reached Haigerloch, the site of the last German wartime reactor experiment.[48]
On 2 December 1942, as part of the Manhattan Project, another team led by Enrico Fermi was able to initiate the first artificial self-sustained nuclear chain reaction, Chicago Pile-1. An initial plan using enriched uranium-235 was abandoned as it was as yet unavailable in sufficient quantities.[49] Working in a lab below the stands of Stagg Field at the University of Chicago, the team created the conditions needed for such a reaction by piling together 360 tonnes of graphite, 53 tonnes of uranium oxide, and 5.5 tonnes of uranium metal, a majority of which was supplied by Westinghouse Lamp Plant in a makeshift production process.[41][50]
Two major types of atomic bombs were developed by the United States during World War II: a uranium-based device (codenamed "Little Boy") whose fissile material was highly enriched uranium, and a plutonium-based device (see Trinity test and "Fat Man") whose plutonium was derived from uranium-238. The uranium-based Little Boy device became the first nuclear weapon used in war when it was detonated over the Japanese city of Hiroshima on 6 August 1945. Exploding with a yield equivalent to 12,500 tonnes of trinitrotoluene, the blast and thermal wave of the bomb destroyed nearly 50,000 buildings and killed approximately 75,000 people (see Atomic bombings of Hiroshima and Nagasaki).[37] Initially it was believed that uranium was relatively rare, and that nuclear proliferation could be avoided by simply buying up all known uranium stocks, but within a decade large deposits of it were discovered in many places around the world.[51][52]
The X-10 Graphite Reactor at Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee, formerly known as the Clinton Pile and X-10 Pile, was the world's second artificial nuclear reactor (after Enrico Fermi's Chicago Pile) and was the first reactor designed and built for continuous operation. Argonne National Laboratory's Experimental Breeder Reactor I, located at the Atomic Energy Commission's National Reactor Testing Station near Arco, Idaho, became the first nuclear reactor to create electricity on 20 December 1951.[53] Initially, four 150-watt light bulbs were lit by the reactor, but improvements eventually enabled it to power the whole facility (later, the town of Arco became the first in the world to have all its electricity come from nuclear power generated by BORAX-III, another reactor designed and operated by Argonne National Laboratory).[54][55] The world's first commercial scale nuclear power station, Obninsk in the Soviet Union, began generation with its reactor AM-1 on 27 June 1954. Other early nuclear power plants were Calder Hall in England, which began generation on 17 October 1956,[56] and the Shippingport Atomic Power Station in Pennsylvania, which began on 26 May 1958. Nuclear power was used for the first time for propulsion by a submarine, the USS Nautilus, in 1954.[41][57]
Prehistoric naturally occurring fission Main article: Natural nuclear fission reactor In 1972, the French physicist Francis Perrin discovered fifteen ancient and no longer active natural nuclear fission reactors in three separate ore deposits at the Oklo mine in Gabon, West Africa, collectively known as the Oklo Fossil Reactors. The ore deposit is 1.7 billion years old; then, uranium-235 constituted about 3% of the total uranium on Earth.[58] This is high enough to permit a sustained nuclear fission chain reaction to occur, provided other supporting conditions exist. The capacity of the surrounding sediment to contain the health-threatening nuclear waste products has been cited by the U.S. federal government as supporting evidence for the feasibility to store spent nuclear fuel at the Yucca Mountain nuclear waste repository.[58]
Above-ground nuclear tests by the Soviet Union and the United States in the 1950s and early 1960s and by France into the 1970s and 1980s[23] spread a significant amount of fallout from uranium daughter isotopes around the world.[59] Additional fallout and pollution occurred from several nuclear accidents.[60]
Uranium miners have a higher incidence of cancer. An excess risk of lung cancer among Navajo uranium miners, for example, has been documented and linked to their occupation.[61] The Radiation Exposure Compensation Act, a 1990 law in the US, required $100,000 in "compassion payments" to uranium miners diagnosed with cancer or other respiratory ailments.[62]
During the Cold War between the Soviet Union and the United States, huge stockpiles of uranium were amassed and tens of thousands of nuclear weapons were created using enriched uranium and plutonium made from uranium. After the break-up of the Soviet Union in 1991, an estimated 600 short tons (540 metric tons) of highly enriched weapons grade uranium (enough to make 40,000 nuclear warheads) had been stored in often inadequately guarded facilities in the Russian Federation and several other former Soviet states.[16] Police in Asia, Europe, and South America on at least 16 occasions from 1993 to 2005 have intercepted shipments of smuggled bomb-grade uranium or plutonium, most of which was from ex-Soviet sources.[16] From 1993 to 2005 the Material Protection, Control, and Accounting Program, operated by the federal government of the United States, spent approximately US $550 million to help safeguard uranium and plutonium stockpiles in Russia. This money was used for improvements and security enhancements at research and storage facilities.[16]
Safety of nuclear facilities in Russia has been significantly improved since the stabilization of political and economical turmoil of the early 1990s. For example, in 1993 there were 29 incidents ranking above level 1 on the International Nuclear Event Scale, and this number dropped under four per year in 1995–2003. The number of employers receiving annual radiation doses above 20 mSv, which is equivalent to a single full-body CT scan,[63] saw a strong decline around 2000. In November 2015, the Russian government approved a federal program for nuclear and radiation safety for 2016 to 2030 with a budget of 562 billion rubles (ca. 8 billion dollars). Its key issue is "the deferred liabilities accumulated during the 70 years of the nuclear industry, particularly during the time of the Soviet Union". Approximately 73% of the budget will be spent on decommissioning aged and obsolete nuclear reactors and nuclear facilities, especially those involved in state defense programs; 20% will go in processing and disposal of nuclear fuel and radioactive waste, and 5% into monitoring and ensuring of nuclear and radiation safety.[64]
Along with all elements having atomic weights higher than that of iron, uranium is only naturally formed by the r-process (rapid neutron capture) in supernovae and neutron star mergers.[65] Primordial thorium and uranium are only produced in the r-process, because the s-process (slow neutron capture) is too slow and cannot pass the gap of instability after bismuth.[66][67] Besides the two extant primordial uranium isotopes, 235U and 238U, the r-process also produced significant quantities of 236U, which has a shorter half-life and so is an extinct radionuclide, having long since decayed completely to 232Th. Uranium-236 was itself enriched by the decay of 244Pu, accounting for the observed higher-than-expected abundance of thorium and lower-than-expected abundance of uranium.[68] While the natural abundance of uranium has been supplemented by the decay of extinct 242Pu (half-life 0.375 million years) and 247Cm (half-life 16 million years), producing 238U and 235U respectively, this occurred to an almost negligible extent due to the shorter half-lives of these parents and their lower production than 236U and 244Pu, the parents of thorium: the 247Cm:235U ratio at the formation of the Solar System was (7.0±1.6)×10−5.[69]
Uranium is a naturally occurring element that can be found in low levels within all rock, soil, and water. Uranium is the 51st element in order of abundance in the Earth's crust. Uranium is also the highest-numbered element to be found naturally in significant quantities on Earth and is almost always found combined with other elements.[10] The decay of uranium, thorium, and potassium-40 in the Earth's mantle is thought to be the main source of heat[70][71] that keeps the Earth's outer core in the liquid state and drives mantle convection, which in turn drives plate tectonics.
Uranium's average concentration in the Earth's crust is (depending on the reference) 2 to 4 parts per million,[9][23] or about 40 times as abundant as silver.[15] The Earth's crust from the surface to 25 km (15 mi) down is calculated to contain 1017 kg (2×1017 lb) of uranium while the oceans may contain 1013 kg (2×1013 lb).[9] The concentration of uranium in soil ranges from 0.7 to 11 parts per million (up to 15 parts per million in farmland soil due to use of phosphate fertilizers),[72] and its concentration in sea water is 3 parts per billion.[23]
Uranium is more plentiful than antimony, tin, cadmium, mercury, or silver, and it is about as abundant as arsenic or molybdenum.[10][23] Uranium is found in hundreds of minerals, including uraninite (the most common uranium ore), carnotite, autunite, uranophane, torbernite, and coffinite.[10] Significant concentrations of uranium occur in some substances such as phosphate rock deposits, and minerals such as lignite, and monazite sands in uranium-rich ores[10] (it is recovered commercially from sources with as little as 0.1% uranium[15]).
Some bacteria, such as Shewanella putrefaciens, Geobacter metallireducens and some strains of Burkholderia fungorum, use uranium for their growth and convert U(VI) to U(IV).[73][74] Recent research suggests that this pathway includes reduction of the soluble U(VI) via an intermediate U(V) pentavalent state.[75][76] Other organisms, such as the lichen Trapelia involuta or microorganisms such as the bacterium Citrobacter, can absorb concentrations of uranium that are up to 300 times the level of their environment.[77] Citrobacter species absorb uranyl ions when given glycerol phosphate (or other similar organic phosphates). After one day, one gram of bacteria can encrust themselves with nine grams of uranyl phosphate crystals; this creates the possibility that these organisms could be used in bioremediation to decontaminate uranium-polluted water.[31][78] The proteobacterium Geobacter has also been shown to bioremediate uranium in ground water.[79] The mycorrhizal fungus Glomus intraradices increases uranium content in the roots of its symbiotic plant.[80]
In nature, uranium(VI) forms highly soluble carbonate complexes at alkaline pH. This leads to an increase in mobility and availability of uranium to groundwater and soil from nuclear wastes which leads to health hazards. However, it is difficult to precipitate uranium as phosphate in the presence of excess carbonate at alkaline pH. A Sphingomonas sp. strain BSAR-1 has been found to express a high activity alkaline phosphatase (PhoK) that has been applied for bioprecipitation of uranium as uranyl phosphate species from alkaline solutions. The precipitation ability was enhanced by overexpressing PhoK protein in E. coli.[81]
Plants absorb some uranium from soil. Dry weight concentrations of uranium in plants range from 5 to 60 parts per billion, and ash from burnt wood can have concentrations up to 4 parts per million.[31] Dry weight concentrations of uranium in food plants are typically lower with one to two micrograms per day ingested through the food people eat.[31]
Production and mining Main article: Uranium mining Worldwide production of uranium in 2021 amounted to 48,332 tonnes, of which 21,819 t (45%) was mined in Kazakhstan. Other important urmom mining countries are Namibia (5,753 t), Canada (4,693 t), Australia (4,192 t), Uzbekistan (3,500 t), and Russia (2,635 t).[82]
Uranium ore is mined in several ways: by open pit, underground, in-situ leaching, and borehole mining (see uranium mining).[7] Low-grade uranium ore mined typically contains 0.01 to 0.25% uranium oxides. Extensive measures must be employed to extract the metal from its ore.[83] High-grade ores found in Athabasca Basin deposits in Saskatchewan, Canada can contain up to 23% uranium oxides on average.[84] Uranium ore is crushed and rendered into a fine powder and then leached with either an acid or alkali. The leachate is subjected to one of several sequences of precipitation, solvent extraction, and ion exchange. The resulting mixture, called yellowcake, contains at least 75% uranium oxides U3O8. Yellowcake is then calcined to remove impurities from the milling process before refining and conversion.[85]
Commercial-grade uranium can be produced through the reduction of uranium halides with alkali or alkaline earth metals.[10] Uranium metal can also be prepared through electrolysis of KUF 5 or UF 4, dissolved in molten calcium chloride (CaCl 2) and sodium chloride (NaCl) solution.[10] Very pure uranium is produced through the thermal decomposition of uranium halides on a hot filament.[10]
It is estimated that 6.1 million tonnes of uranium exists in ore reserves that are economically viable at US$130 per kg of uranium,[87] while 35 million tonnes are classed as mineral resources (reasonable prospects for eventual economic extraction).[88]
Australia has 28% of the world's known uranium ore reserves[87] and the world's largest single uranium deposit is located at the Olympic Dam Mine in South Australia.[89] There is a significant reserve of uranium in Bakouma, a sub-prefecture in the prefecture of Mbomou in the Central African Republic.[90]
Some uranium also originates from dismantled nuclear weapons.[91] For example, in 1993–2013 Russia supplied the United States with 15,000 tonnes of low-enriched uranium within the Megatons to Megawatts Program.[92]
An additional 4.6 billion tonnes of uranium are estimated to be dissolved in sea water (Japanese scientists in the 1980s showed that extraction of uranium from sea water using ion exchangers was technically feasible).[93][94] There have been experiments to extract uranium from sea water,[95] but the yield has been low due to the carbonate present in the water. In 2012, ORNL researchers announced the successful development of a new absorbent material dubbed HiCap which performs surface retention of solid or gas molecules, atoms or ions and also effectively removes toxic metals from water, according to results verified by researchers at Pacific Northwest National Laboratory.[96][97]
In 2005, ten countries accounted for the majority of the world's concentrated uranium oxides: Canada (27.9%), Australia (22.8%), Kazakhstan (10.5%), Russia (8.0%), Namibia (7.5%), Niger (7.4%), Uzbekistan (5.5%), the United States (2.5%), Argentina (2.1%) and Ukraine (1.9%).[99] In 2008 Kazakhstan was forecast to increase production and become the world's largest supplier of uranium by 2009.[100][101] The prediction came true, and Kazakhstan does dominate the world's uranium market since 2010. In 2021, its share was 45.1%, followed by Namibia (11.9%), Canada (9.7%), Australia (8.7%), Uzbekistan (7.2%), Niger (4.7%), Russia (5.5%), China (3.9%), India (1.3%), Ukraine (0.9%), and South Africa (0.8%), with a world total production of 48,332 tonnes.[82] Most of uranium was produced not by conventional underground mining of ores (29% of production), but by in situ leaching (66%).[82][102]
In the late 1960s, UN geologists also discovered major uranium deposits and other rare mineral reserves in Somalia. The find was the largest of its kind, with industry experts estimating the deposits at over 25% of the world's then known uranium reserves of 800,000 tons.[103]
The ultimate available supply is believed to be sufficient for at least the next 85 years,[88] although some studies indicate underinvestment in the late twentieth century may produce supply problems in the 21st century.[104] Uranium deposits seem to be log-normal distributed. There is a 300-fold increase in the amount of uranium recoverable for each tenfold decrease in ore grade.[105] In other words, there is little high grade ore and proportionately much more low grade ore available.
Calcined uranium yellowcake, as produced in many large mills, contains a distribution of uranium oxidation species in various forms ranging from most oxidized to least oxidized. Particles with short residence times in a calciner will generally be less oxidized than those with long retention times or particles recovered in the stack scrubber. Uranium content is usually referenced to U 3O 8, which dates to the days of the Manhattan Project when U 3O 8 was used as an analytical chemistry reporting standard.[106]
Phase relationships in the uranium-oxygen system are complex. The most important oxidation states of uranium are uranium(IV) and uranium(VI), and their two corresponding oxides are, respectively, uranium dioxide (UO 2) and uranium trioxide (UO 3).[107] Other uranium oxides such as uranium monoxide (UO), diuranium pentoxide (U 2O 5), and uranium peroxide (UO 4·2H 2O) also exist.
The most common forms of uranium oxide are triuranium octoxide (U 3O 8) and UO 2.[108] Both oxide forms are solids that have low solubility in water and are relatively stable over a wide range of environmental conditions. Triuranium octoxide is (depending on conditions) the most stable compound of uranium and is the form most commonly found in nature. Uranium dioxide is the form in which uranium is most commonly used as a nuclear reactor fuel.[108] At ambient temperatures, UO 2 will gradually convert to U 3O 8. Because of their stability, uranium oxides are generally considered the preferred chemical form for storage or disposal.[108]
Salts of many oxidation states of uranium are water-soluble and may be studied in aqueous solutions. The most common ionic forms are U3+ (brown-red), U4+ (green), UO+ 2 (unstable), and UO2+ 2 (yellow), for U(III), U(IV), U(V), and U(VI), respectively.[109] A few solid and semi-metallic compounds such as UO and US exist for the formal oxidation state uranium(II), but no simple ions are known to exist in solution for that state. Ions of U3+ liberate hydrogen from water and are therefore considered to be highly unstable. The UO2+ 2 ion represents the uranium(VI) state and is known to form compounds such as uranyl carbonate, uranyl chloride and uranyl sulfate. UO2+ 2 also forms complexes with various organic chelating agents, the most commonly encountered of which is uranyl acetate.[109]
Unlike the uranyl salts of uranium and polyatomic ion uranium-oxide cationic forms, the uranates, salts containing a polyatomic uranium-oxide anion, are generally not water-soluble.
Carbonates The interactions of carbonate anions with uranium(VI) cause the Pourbaix diagram to change greatly when the medium is changed from water to a carbonate containing solution. While the vast majority of carbonates are insoluble in water (students are often taught that all carbonates other than those of alkali metals are insoluble in water), uranium carbonates are often soluble in water. This is because a U(VI) cation is able to bind two terminal oxides and three or more carbonates to form anionic complexes.
Effects of pH The uranium fraction diagrams in the presence of carbonate illustrate this further: when the pH of a uranium(VI) solution increases, the uranium is converted to a hydrated uranium oxide hydroxide and at high pHs it becomes an anionic hydroxide complex.
When carbonate is added, uranium is converted to a series of carbonate complexes if the pH is increased. One effect of these reactions is increased solubility of uranium in the pH range 6 to 8, a fact that has a direct bearing on the long term stability of spent uranium dioxide nuclear fuels.
Hydrides, carbides and nitrides Uranium metal heated to 250 to 300 °C (482 to 572 °F) reacts with hydrogen to form uranium hydride. Even higher temperatures will reversibly remove the hydrogen. This property makes uranium hydrides convenient starting materials to create reactive uranium powder along with various uranium carbide, nitride, and halide compounds.[111] Two crystal modifications of uranium hydride exist: an α form that is obtained at low temperatures and a β form that is created when the formation temperature is above 250 °C.[111]
Uranium carbides and uranium nitrides are both relatively inert semimetallic compounds that are minimally soluble in acids, react with water, and can ignite in air to form U 3O 8.[111] Carbides of uranium include uranium monocarbide (UC), uranium dicarbide (UC 2), and diuranium tricarbide (U 2C 3). Both UC and UC 2 are formed by adding carbon to molten uranium or by exposing the metal to carbon monoxide at high temperatures. Stable below 1800 °C, U 2C 3 is prepared by subjecting a heated mixture of UC and UC 2 to mechanical stress.[112] Uranium nitrides obtained by direct exposure of the metal to nitrogen include uranium mononitride (UN), uranium dinitride (UN 2), and diuranium trinitride (U 2N 3).[112]

Hello again, Ive done the captain of the Card Pirates (Formely the Risky Pirates) Otex D. Ray, this is the first mate of the crew.
Name: Charlotte Loas
Role: First Mate and Cook
Epithet: "Heart Stealer"
Devil Fruit: Hito Hito no Mi Model: Muma / Human Human Frui Model: Succubus
Haki: Armament & Adv. Observation
Haki Capabilities: Adv. Armament & Conquerors
Combat Style: Loas isn't much of a fighter but she will always fight if needed. She is more of a recon and silent fighter going in through people's dreams. She uses her Hybrid form to fight most of the time. She flies around with her wings and will use her enhanced speed and strength to attack. Her main combat stratagy is to wear her opponet down since she has enhanced stamina.
Description: Loas is a beutiful 28 year old woman who stands at a height of 6'10. She has a decent physique and decently flexible. Thanks to her fruit she has perfect skin. Her hair is short and a shiny white. Her eyes are a red with heart pupils thanks to her fruit. She has horns, wings, and a tail, since she stays in her hybrid form as it takes no energy to be in the hybrid form. She wears a black suit coat over a red shirt. She also wears a black skirt and red stockings.
Personality: Loas is a kind, clumsy, caring, and seductive. She doesnt alwasy mean to be suductive but it just kind of happens thanks to her fruit. She puts her heart and soul into her cooking and will do anything her captain asks of her. Overall, she is a great person to be friends with.
Goals: Her only goal is to server the person who saved her life to the end.
Backstory / Before Joining the Crew: Charolotte Loas is one of the many children that Charlotte Linlin, but unlike the rest of her children she sold of Loas to a pirate who payed with a hefty amount of food. This happened when she was only six years old. One year later the man had put her on a slave auction on the Sabaody Archipelago, being one of the Four Emporers' child, she sold for a hefty amount to a Celestial Dragon. After another 19 years she was forced to eat a devil fruit, unknown to her owner, was a Mythical Zoan. While being forced to carry her owner she ran into Otex D. Ray. The celestial dragon on her had just gotten off to buy something from a store. Ray decided that he would save the much older woman and keep her safe.
Extra Info: Loas despises her mother wishes to kill her. Loas actually likes to note every thing she sees in a notebook. She tears her stockings when nervous.
​
That was the First Mate / Navigator of the Card pirates I'll start posting one of the crewmates every day tomorrow will be the navigator.

Hola ¿alguien que me pueda ayudar con una duda de Figma? Estoy en mi primer curso y realmente no entiendo cómo corregir algunas cosas 😅 gracias 🙋🏻‍♀️

No sé en qué momento todo ha empeorado, o quizás es mi percepción, pero siento que no se puede vivir tranquilamente, bueno, nunca se ha podido, pero ahora está a niveles que antes no. Hace medio mes secuestraron al hijo de un compañero, luego asesinaron a la novia de otro compañero, en mi colonia se mantiene asaltando a la gente que está en el turno nocturno de la maquila, no sé ustedes, pero esta de la verga que se mate uno trabajando para que unos huelles atenten contra tu integridad para quitarte lo que te ha costado meses desvelarte o estar en putiza. Luego, hace medio año matarón a un wey a tres calles de mi casa, a otro lo intentaron matar un mes antes de eso. Si eres adolescente los bullies te hacen la vida imposible. Sí estudias, te espera un salario pedorro, sino estudias te espera un salario pedorro. Con el mínimo no alcanza para mantener un carro, y luego el pinchi camión pasa bien tarde, se va lento, va lleno, te va a cobrar 15 varos, que si tienes que agarrar cuatro camiones se van ahí 60 varos, la comida está bien cara, por lo que tienes que cargar lonchera en el camión, que quieres ir de viajé de vacaciones dentro del estado te detienen los soldados con tennis, que si quieres salir de vacaciones a un lugar del país tienes que endeudarte, las casas que muchos acompletan con infonavit está en los puntos más violentos de la ciudad, que si te compras un terreno te llevara años pagarlo. Neta, de donde agarran ganas para seguir continuando, digo, no pienso en el suicidio, pero si esta del verga vivir con todo el desmadre de allá afuera.

Hace un par de semanas corté con mi novia y la semana pasada me dijo que ya no quería saber nada de mi, la extraño demasiado y quisiera hablar con ella pero no sé si debo o no. Ayuda!!!

Me distancia de mi mejor amiga de años en la secundaria y aveces charlábamos, me ayudo a entrar a la prepa y me empecé a ir con ella en la misma ruta para ir cotorreando y haci hasta llegar a 3ro de prepa, me di cuenta que me gustaba pero jamás tuve el coraje para decírselo y en una ocasión comentó que le gustaba un chico de su mismo salón pero que tenía una reputación de infiel. También me comentó que había alguien que le estaba tirando la onda y que eran novios y me lo quería presentar, ese día caminando me quedé callado todo el camino sin saber que decir ni que pensar un nuevo sentimiento se apoderaba de mi y no entendía que era lo que sucedía conmigo. Yo le dije que no me presentará por que Mejores amigos y novios es muy infrecuente que se hagan amigos, me pidió una explicación y le dije eso y " normal mente la o el mejor [email protected] si consigue [email protected], la relación de mejor amigo cambia y ya no es como antes.
1ra parte de 3.

Solamente 3 oraciones y ya está. Voy a empezar a cambiar mi rutina nocturna entonces no tengo tiempo ahora para escribir mucho desde que dormiré en una hora y necesito meditar. Nunca he visto demasiada lluvia en México hasta el día de hoy, me sorprendió mucho porque sentía como un país de sol. Tuve un día muy productivo también, estoy muy agradecido por eso. Hasta mañana.

Buenas noches. Pido perdón de antemano si no estoy publicando en el lugar correcto pero me pareció lo más adecuado. Estaba pensando en vender mi PC y no se cuánto puedo sacar por ella. Paso características
Amd r5 2600x Xfx RX 580 8gb Motherboard MSI x470 Gaming plus 2x4 vengeance 2666mhz SSD 256gb Samsung Evo Disco HDD 1TB Fuente de poder Evga bronce 600W
Muchas gracias de antemano.

Buenas,lo que pasa es que tengo 15 años y mis papás no me dejan hacer piercings pero hasta donde tengo entendido ¿no me estarían vulnerando el derecho al libre desarrollo de la personalidad? No sé si solo pienso eso por mi ignorancia