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ores | A Wisdom Archive on ores | | ores A selection of articles related to ores | |
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ores, Ore, Ore - Important ore minerals, Mineral resource classification, Economic geology
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| ARTICLES RELATED TO ores | | | |  ores: Encyclopedia II - Hydrogen - OccurrenceHydrogen is the most abundant element in the universe, making up 75% of normal matter by mass and over 90% by number of atoms. [4] This element is found in great abundance in stars and gas giant planets. However, it is very rare in the Earth's atmosphere (1 ppm by volume). Its scarcity is due to the fact that hydrogen is the lightest gas, allowing it to escape Earth's gravity. When compounds are included, though, hydrogen is the tenth most abu ...
See also:Hydrogen, Hydrogen - Basic features, Hydrogen - Applications, Hydrogen - History, Hydrogen - Electron energy levels, Hydrogen - Occurrence, Hydrogen - Compounds, Hydrogen - Forms, Hydrogen - Isotopes, Hydrogen - Biology Read more here: » Hydrogen: Encyclopedia II - Hydrogen - Occurrence |
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| | | | | | ores: Encyclopedia II - Iron - Isotopes Naturally occurring iron consists of four isotopes: 5.845% of radioactive 54Fe (half-life: >3.1E22 years), 91.754% of stable 56Fe, 2.119% of stable 57Fe and 0.282% of stable 58Fe. 60Fe is an extinct radionuclide of long half-life (1.5 million years). Much of the past work on measuring the isotopic composition of Fe has centered on determining 60Fe variations due to processes accompanying nucleosynthesis (i.e., mete ...
See also:Iron, Iron - Notable characteristics, Iron - Applications, Iron - History, Iron - Occurrence, Iron - Extraction from ore, Iron - Compounds, Iron - Isotopes, Iron - Biological role, Iron - Precautions Read more here: » Iron: Encyclopedia II - Iron - Isotopes |
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| | | | | ores: Encyclopedia II - Poverty in Africa - Overpopulation Persons with large families in Africa are often seen as well off. most of the elderly rely on their children for support. In addition, as much agriculture in Africa is labor-intensive, large numbers of children provide much needed labor for plowing, planting and harvesting.
However, like most places in the world, the real overpopulation is in urban areas, which have grown out of control since the trend towards ...
See also:Poverty in Africa, Poverty in Africa - Scope, Poverty in Africa - Overpopulation, Poverty in Africa - Mismanagement of land, Poverty in Africa - Loss of traditional land uses, Poverty in Africa - Misused Money, Poverty in Africa - Capital Flight, Poverty in Africa - Human Resources, Poverty in Africa - Disease, Poverty in Africa - Lack of Infrastructure, Poverty in Africa - Conflict, Poverty in Africa - External link Read more here: » Poverty in Africa: Encyclopedia II - Poverty in Africa - Overpopulation |
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| | | | | ores: Encyclopedia II - Poverty in Africa - Mismanagement of land Despite large amounts of arable land south of the Sahara Desert, small, individual land holding are rare. In many nations, land is subject to tribal ownership and in others most of the land is often in the hands descendants of European settlers in the late 19th century and early 20th century. For example, about 82% of the arable land in South Africa is owned by those of European descent. Many nations even lack a system of freehold landowning. In others, the laws prevent persons from disadvantaged groups from owning land at all. Although ofte ...
See also:Poverty in Africa, Poverty in Africa - Scope, Poverty in Africa - Overpopulation, Poverty in Africa - Mismanagement of land, Poverty in Africa - Loss of traditional land uses, Poverty in Africa - Misused Money, Poverty in Africa - Capital Flight, Poverty in Africa - Human Resources, Poverty in Africa - Disease, Poverty in Africa - Lack of Infrastructure, Poverty in Africa - Conflict, Poverty in Africa - External link Read more here: » Poverty in Africa: Encyclopedia II - Poverty in Africa - Mismanagement of land |
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| | | | | ores: Encyclopedia II - Poverty in Africa - Scope Poverty is the inability to attain a minimum standard of living. The World Bank defines absolute poverty as a condition of life so degraded by disease, illiteracy, malnutrition and squalour as to deny its victim basic human necessities.
There are certain factors which keep nations poor eg; lack of resources, limited education opportunities, a death of skills and economic, social and politi ...
See also:Poverty in Africa, Poverty in Africa - Scope, Poverty in Africa - Overpopulation, Poverty in Africa - Mismanagement of land, Poverty in Africa - Loss of traditional land uses, Poverty in Africa - Misused Money, Poverty in Africa - Capital Flight, Poverty in Africa - Human Resources, Poverty in Africa - Disease, Poverty in Africa - Lack of Infrastructure, Poverty in Africa - Conflict, Poverty in Africa - External link Read more here: » Poverty in Africa: Encyclopedia II - Poverty in Africa - Scope |
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| | | | | ores: Encyclopedia II - Zinc - History Zinc alloys have been used for centuries, as brass goods dating to 1000-1400 BC have been found in Palestine and zinc objects with 87% zinc have been found in prehistoric Transylvania. Because of the low boiling point and high chemical reactivity of this metal (isolated zinc would tend to go up the chimney rather than be captured), the true nature of this metal was not understood in ancient times.
The manufacture of brass was known to the Romans by about 30 BC, using a technique where calamine and copper were heated together in a cruc ...
See also:Zinc, Zinc - Notable characteristics, Zinc - Applications, Zinc - Popular misconceptions, Zinc - History, Zinc - Biological role, Zinc - Food Sources, Zinc - Zinc Deficiency, Zinc - Zinc Toxicity, Zinc - Psoriasis, Zinc - Immune System, Zinc - Abundance, Zinc - Zinc production, Zinc - Compounds, Zinc - Isotopes, Zinc - Precautions Read more here: » Zinc: Encyclopedia II - Zinc - History |
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| | | | | ores: Encyclopedia II - Zinc - Biological role Zinc is an essential element, necessary for sustaining all life. It is estimated that 3000 of the hundreds of thousands of proteins in the human body contain zinc.
Zinc - Food Sources.
The best and most abundant natural food source of zinc is oysters, although these bottom scavengers also accumulate toxic metals. Zinc is found in most animal proteins such as beef, pork and poultry. Other food sources of zinc include beans, nuts, whole grains, pumpkin seeds and sunflower seeds. Phytates, which are found in ...
See also:Zinc, Zinc - Notable characteristics, Zinc - Applications, Zinc - Popular misconceptions, Zinc - History, Zinc - Biological role, Zinc - Food Sources, Zinc - Zinc Deficiency, Zinc - Zinc Toxicity, Zinc - Psoriasis, Zinc - Immune System, Zinc - Abundance, Zinc - Zinc production, Zinc - Compounds, Zinc - Isotopes, Zinc - Precautions Read more here: » Zinc: Encyclopedia II - Zinc - Biological role |
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| | | | | ores: Encyclopedia II - Poverty in Africa - Loss of traditional land uses Until the late 19th century, Africa supported a wide variety of subsistence agricultural methods (herding, hunting, gathering, small-scale farming) together with the development of a few high-cost commodity crops (cloves, spices). However, the vagarities of 20th century life have often thrown traditional methods out of whack. For example, Africans have hunted large animals since the first modern humans appeared 50,000-250,000 years ago. However, most of the large wild animals left in Africa are found in nature reserves, which are now off lim ...
See also:Poverty in Africa, Poverty in Africa - Scope, Poverty in Africa - Overpopulation, Poverty in Africa - Mismanagement of land, Poverty in Africa - Loss of traditional land uses, Poverty in Africa - Misused Money, Poverty in Africa - Capital Flight, Poverty in Africa - Human Resources, Poverty in Africa - Disease, Poverty in Africa - Lack of Infrastructure, Poverty in Africa - Conflict, Poverty in Africa - External link Read more here: » Poverty in Africa: Encyclopedia II - Poverty in Africa - Loss of traditional land uses |
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| | | | | ores: Encyclopedia II - Reflection seismology - Environmental impact As with all human activities, reflection seismic experiments may impact the Earth's natural environment. On land, conducting a seismic survey may require the building of roads in order to transport equipment and personnel. Even if roads are not required, vegetation may need to be cleared for the deployment of geophones. If the survey is in a relatively undeveloped area, significant habitat disturbance may result. Many land crews now use helicopters instead of land vehicles in remote areas. Most countries require that seismic surveys are conducted according to ...
See also:Reflection seismology, Reflection seismology - Applications, Reflection seismology - Hydrocarbon exploration, Reflection seismology - Crustal studies, Reflection seismology - Outline of the method, Reflection seismology - Reflection experiments, Reflection seismology - Interpretation of reflections, Reflection seismology - Reflection and transmission, Reflection seismology - Environmental impact, Reflection seismology - History Read more here: » Reflection seismology: Encyclopedia II - Reflection seismology - Environmental impact |
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| | | | | ores: Encyclopedia II - Reflection seismology - Applications Reflection seismology is extensively used in exploration for hydrocarbons (i.e., petroleum , natural gas) and other resources as coal, ores and minerals, geothermal. Reflection seismology is also used for basic research into the nature and origin of the rocks making up the Earth's crust. Reflection Seismology is also used in shallow application for engineering, groundwater and environmental surveying. A method similar to reflection seismology which uses electromagnetic instead of elastic waves is known as ground penetrating radar or GPR. GPR is widely used for ...
See also:Reflection seismology, Reflection seismology - Applications, Reflection seismology - Hydrocarbon exploration, Reflection seismology - Crustal studies, Reflection seismology - Outline of the method, Reflection seismology - Reflection experiments, Reflection seismology - Interpretation of reflections, Reflection seismology - Reflection and transmission, Reflection seismology - Environmental impact, Reflection seismology - History Read more here: » Reflection seismology: Encyclopedia II - Reflection seismology - Applications |
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| | | | | ores: Encyclopedia II - Poverty in Africa - Lack of Infrastructure Clean, potable water is rare in most of Africa (even those parts outside the sub-Saharan region) despite the fact that the continent is crossed by several major rivers and contains some of the largest fresh water lakes in the world. However, many of the major population centres are on the coast, and few major cities have adequate sewage treatment systems. Although boiling water is a possibility, fuel for boiling is scarce as well. The problem is worst in Africa' ...
See also:Poverty in Africa, Poverty in Africa - Scope, Poverty in Africa - Overpopulation, Poverty in Africa - Mismanagement of land, Poverty in Africa - Loss of traditional land uses, Poverty in Africa - Misused Money, Poverty in Africa - Capital Flight, Poverty in Africa - Human Resources, Poverty in Africa - Disease, Poverty in Africa - Lack of Infrastructure, Poverty in Africa - Conflict, Poverty in Africa - External link Read more here: » Poverty in Africa: Encyclopedia II - Poverty in Africa - Lack of Infrastructure |
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| | | | | ores: Encyclopedia II - Poverty in Africa - Human Resources The availability of cheap labor has often perpetuated policies that encourage poor agricultural and industrial practices, leaving Africa further and further behind. For example, author P.J. O'Rourke noted on his trip to Tanzania for his book Eat the Rich that gravel was produced with manual labor (by pounding rocks with tools), where in almost everywhere else in the world machines did the same work far more cheaply and efficiently. He used Tanzania as an example of a nation with superb natural resources that nev ...
See also:Poverty in Africa, Poverty in Africa - Scope, Poverty in Africa - Overpopulation, Poverty in Africa - Mismanagement of land, Poverty in Africa - Loss of traditional land uses, Poverty in Africa - Misused Money, Poverty in Africa - Capital Flight, Poverty in Africa - Human Resources, Poverty in Africa - Disease, Poverty in Africa - Lack of Infrastructure, Poverty in Africa - Conflict, Poverty in Africa - External link Read more here: » Poverty in Africa: Encyclopedia II - Poverty in Africa - Human Resources |
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| | | | | ores: Encyclopedia II - Poverty in Africa - Capital Flight This has been a problem since the very beginning of Europan colonization, and in many ways the problem has become worse. Because most African nations are heavily in debt, most export income generated by these nations goes out in the form of interest payments. In addition, many assets within Africa are owned by foreign interests, and money earned by those assets (particularly oil) is often sent directly out of the country. However, nationalization of assets has not always ensured prosperity. When Egypt nationalized the Suez Canal in the late ...
See also:Poverty in Africa, Poverty in Africa - Scope, Poverty in Africa - Overpopulation, Poverty in Africa - Mismanagement of land, Poverty in Africa - Loss of traditional land uses, Poverty in Africa - Misused Money, Poverty in Africa - Capital Flight, Poverty in Africa - Human Resources, Poverty in Africa - Disease, Poverty in Africa - Lack of Infrastructure, Poverty in Africa - Conflict, Poverty in Africa - External link Read more here: » Poverty in Africa: Encyclopedia II - Poverty in Africa - Capital Flight |
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| | | | | ores: Encyclopedia II - Reflection seismology - History Reflections of waves generated by earthquakes have been observed on seismograms since the beginning of modern seismology. Seismologists have been able to develop familiar models of the Earth's interior in part by observing these reflections from major boundaries deep within the earth. However, the history of the use of human-generated seismic waves to map in detail the geology of the Earth's crust is largely tied to commercial ...
See also:Reflection seismology, Reflection seismology - Applications, Reflection seismology - Hydrocarbon exploration, Reflection seismology - Crustal studies, Reflection seismology - Outline of the method, Reflection seismology - Reflection experiments, Reflection seismology - Interpretation of reflections, Reflection seismology - Reflection and transmission, Reflection seismology - Environmental impact, Reflection seismology - History Read more here: » Reflection seismology: Encyclopedia II - Reflection seismology - History |
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| | | | | ores: Encyclopedia II - Mission San Juan Capistrano - The return of the swallows Father O'Sullivan made note of the birds' annual habit of nesting beneath the Mission's eaves and archways, from Spring through Fall, during his two decades in residence. On March 13, 1939, a popular radio program was broadcast live from the Mission grounds, announcing the swallows' return. Composer Leon René was so inspired by the event that he penned the song When the Swallows Come Back to Capistrano in tribute. During its initial release the song spent several weeks atop the Your Hit Parade charts. The song has been recorded by suc ...
See also:Mission San Juan Capistrano, Mission San Juan Capistrano - Mission history, Mission San Juan Capistrano - The Spanish Mission Era 1776 – 1820, Mission San Juan Capistrano - The Mexican Rancho Era 1821 – 1847, Mission San Juan Capistrano - California Statehood 1850 – 1900, Mission San Juan Capistrano - The 20th Century and beyond 1901 – present, Mission San Juan Capistrano - Mission industries, Mission San Juan Capistrano - The Mission bells, Mission San Juan Capistrano - The return of the swallows, Mission San Juan Capistrano - Historic designations Read more here: » Mission San Juan Capistrano: Encyclopedia II - Mission San Juan Capistrano - The return of the swallows |
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| | | | | ores: Encyclopedia II - Magnetism - Magnetic monopoles . Contrary to normal experience, some theoretical physics models predict the existence of magnetic monopoles. Paul Dirac observed in 1931 that, because electricity and magnetism show a certain symmetry, just as quantum theory predicts that individual positive or negative electric charges can be observed without the opposing charge, isolated South or North magnetic poles should be observable. In practice, however, although charged particles like protons and electrons can be easily isolated as individual electrical charges, magnetic south and no ...
See also:Magnetism, Magnetism - Magnetic materials, Magnetism - Physics of magnetism, Magnetism - Charged particle in a magnetic field, Magnetism - Magnetic dipoles ., Magnetism - Magnetic monopoles ., Magnetism - Atomic magnetic dipoles, Magnetism - Types of magnets, Magnetism - Electromagnets, Magnetism - Permanent Magnets, Magnetism - SI magnetism units, Magnetism - Other magnetism units, Magnetism - Footnotes Read more here: » Magnetism: Encyclopedia II - Magnetism - Magnetic monopoles . |
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| | | | | ores: Encyclopedia II - Magnetism - Atomic magnetic dipoles The physical cause of the magnetism of objects, as distinct from electrical currents, is the atomic magnetic dipole. Magnetic dipoles, or magnetic moments, result on the atomic scale from the two kinds of movement of electrons. The first is the orbital motion of the electron around the nucleus; this motion can be considered as a current loop, resulting in an orbital dipole magnetic moment along the axis of the nucleus. The second, much stronger, source of electronic magnetic moment is due to a quantum mechanical property called the spin dipole magnetic moment (although current quantum mechanical theory states that elect ...
See also:Magnetism, Magnetism - Magnetic materials, Magnetism - Physics of magnetism, Magnetism - Charged particle in a magnetic field, Magnetism - Magnetic dipoles ., Magnetism - Magnetic monopoles ., Magnetism - Atomic magnetic dipoles, Magnetism - Types of magnets, Magnetism - Electromagnets, Magnetism - Permanent Magnets, Magnetism - SI magnetism units, Magnetism - Other magnetism units, Magnetism - Footnotes Read more here: » Magnetism: Encyclopedia II - Magnetism - Atomic magnetic dipoles |
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| | | | | ores: Encyclopedia II - Magnetism - Magnetic dipoles . Normally, magnetic fields are seen as dipoles, having a "South pole" and a "North pole"; terms dating back to the use of magnets as compasses, interacting with the Earth's magnetic field to indicate North and South on the globe.
A magnetic field contains energy, and physical systems stabilize into the configuration with the lowest energy. Therefore, when placed in a magnetic field, a magnetic dipole tends to align itself in opposed polarity to that field, thereby canceling the net field strength as much as possible and lowering ...
See also:Magnetism, Magnetism - Magnetic materials, Magnetism - Physics of magnetism, Magnetism - Charged particle in a magnetic field, Magnetism - Magnetic dipoles ., Magnetism - Magnetic monopoles ., Magnetism - Atomic magnetic dipoles, Magnetism - Types of magnets, Magnetism - Electromagnets, Magnetism - Permanent Magnets, Magnetism - SI magnetism units, Magnetism - Other magnetism units, Magnetism - Footnotes Read more here: » Magnetism: Encyclopedia II - Magnetism - Magnetic dipoles . |
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| | | | | ores: Encyclopedia II - Magnetism - Charged particle in a magnetic field When a charged particle moves through a magnetic field B, it feels a force F given by the cross product:
where
is the electric charge of the particle
is the velocity vector of the particle
is the magnetic field
Because this is a cross product, the force is perpendicular to both the motion of the particle and the magnetic field. It follows that the magnetic force does no work on the particle; it may change the direction of the par ...
See also:Magnetism, Magnetism - Magnetic materials, Magnetism - Physics of magnetism, Magnetism - Charged particle in a magnetic field, Magnetism - Magnetic dipoles ., Magnetism - Magnetic monopoles ., Magnetism - Atomic magnetic dipoles, Magnetism - Types of magnets, Magnetism - Electromagnets, Magnetism - Permanent Magnets, Magnetism - SI magnetism units, Magnetism - Other magnetism units, Magnetism - Footnotes Read more here: » Magnetism: Encyclopedia II - Magnetism - Charged particle in a magnetic field |
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| | | | | ores: Encyclopedia II - Iron - Biological role Iron is essential to all organisms, except for a few bacteria. It is mostly stably incorporated in the inside of metalloproteins, because in exposed or in free form it causes production of free radicals that are generally toxic to cells. To say that iron is free doesn't mean that it is free floating in the bodily fluids. Iron binds avidly to virtually all biomolecules so it will adhere nonspecifically to cell ...
See also:Iron, Iron - Notable characteristics, Iron - Applications, Iron - History, Iron - Occurrence, Iron - Extraction from ore, Iron - Compounds, Iron - Isotopes, Iron - Biological role, Iron - Precautions Read more here: » Iron: Encyclopedia II - Iron - Biological role |
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| | | | | ores: Encyclopedia II - Bashkortostan - Economy Much of Bashkortostan's economy depends on its oil processing industry, which is a left-over from Soviet times and has seen little investment since the collapse of the USSR. Most of the industry, nominally privatized, has in fact been granted to the factions close to the president's family.
More than one half of Bashkortostan's industry is based in Ufa, the republic's capital.
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See also:Bashkortostan, Bashkortostan - Terminology, Bashkortostan - Geography, Bashkortostan - Time zone, Bashkortostan - Rivers, Bashkortostan - Lakes, Bashkortostan - Mountains, Bashkortostan - Natural resources, Bashkortostan - Climate, Bashkortostan - Administrative divisions, Bashkortostan - Demographics, Bashkortostan - Population development, Bashkortostan - History, Bashkortostan - Politics, Bashkortostan - Economy, Bashkortostan - Education, Bashkortostan - Culture, Bashkortostan - Tourism Read more here: » Bashkortostan: Encyclopedia II - Bashkortostan - Economy |
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