Zacatecas is one of the 31 constituent states of Mexico. It is bounded to the north by Durango and Coahuila, to the east by San Luis Potosí, to the south by Aguascalientes and Jalisco, and to the west by Jalisco and Durango. The state shares its name with its capital and chief center of population, the city of Zacatecas, Zacatecas. The state of Zacatecas had an estimated 1,375,000 inhabitants in 2003. (In 1900 it had 462,190 people.) Zacatecas is located in the great central plateau of Mexico, with an average ele ...

Including:

• Zacatecas - Municipalities

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In the context of biology, poisons are substances that cause injury, illness, or death to organisms, usually by chemical reaction or other activity on the molecular scale. Some poisons are also toxins, usually referring to naturally produced substances, such as the bacterial proteins that cause tetanus and botulism. A distinction between the two terms is not always observed, even among scientists. Animal toxins that are delivered subcutaneously (e.g. by sting or bite) are also called venom. In normal usage, a poisonou ...

Including:

• Poison - Biological poisoning
• Poison - Poisoning in children
• Poison - Background
• Poison - Management
• Poison - By mechanism
• Poison - Corrosives T54
• Poison - Metabolic poisons energy
• Poison - Neurotoxins T44
• Poison - Teratogens birth defects
• Poison - Mutagens DNA damage
• Poison - Carcinogens cancer
• Poison - By source
• Poison - Non-radioactive inorganic poisons
• Poison - Organic poisons
• Poison - Naturally produced poisons and toxins
• Poison - Famous poisonings
• Poison - Confirmed poisonings
• Poison - Suspected or rumoured poisonings
• Poison - Poisons in crime fiction
• Poison - Novels
• Poison - Plays
• Poison - Films
• Poison - Poison in other literary works
• Poison - Novels

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To help compare orders of magnitude of different times, this page lists times longer than 1019 seconds (320,000 million years) See also times of other orders of magnitude. See the article about the ultimate fate of the Universe for more discussion of these issues. Shorter times 3.3 × 1012 years – According to the traditional Vedic time of Hinduism, this is the lifetime of Brahma. 7.7 × 1015 years – half-life of cadmium-113 1.4 × 1017 year ...

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A wedding ring or wedding band consists of a precious metal ring, usually worn on the base of the left ring finger – the fourth finger (with the thumb counted as the first finger) of the left hand. Such a ring symbolizes marriage: a spouse wears it to indicate a marital commitment to fidelity. The European custom of wearing such a ring has spread widely beyond Europe. Wedding ring - Traditional customs. Wedding ring - Pre-wedding customs. According to some customs, the ...

Including:

• Wedding ring - Traditional customs
• Wedding ring - Pre-wedding customs
• Wedding ring - Wedding ceremony customs
• Wedding ring - Post-wedding customs
• Wedding ring - Contemporary usage
• Wedding ring - Materials
• Wedding ring - Styles patterns fashions
• Wedding ring - Quotes

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Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. It is in dynamic equilibrium between the liquid and solid states at standard temperature and pressure. At room temperature, it is a nearly colorless, tasteless, and odorless liquid. It is often referred to in the sciences as the universal solvent and the only pure substance found naturally in all three states of matter. Water molecule - Forms of water. See ...

Including:

• Water molecule - Forms of water
• Water molecule - A common substance
• Water molecule - Water in the Universe
• Water molecule - Water on Earth
• Water molecule - Water in industry
• Water molecule - Physics and chemistry of water
• Water molecule - Density of water and ice
• Water molecule - Density of saltwater and ice
• Water molecule - Triple point
• Water molecule - Mpemba effect
• Water molecule - Hot ice
• Water molecule - Surface tension
• Water molecule - Electrical properties
• Water molecule - Dipolar nature of water
• Water molecule - Water as a solvent
• Water molecule - Amphoteric nature of water
• Water molecule - Acidity in nature
• Water molecule - Hydrogen bonding in water
• Water molecule - Quantum properties of Molecular Water
• Water molecule - History
• Water molecule - Systematic nomenclature and humor

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A shotgun shell is a self-contained cartridge loaded with shot or a slug designed to be fired from a shotgun. Most shotgun shells are designed to be fired from a smoothbore barrel, but with the recent gain in popularity of dedicated shotguns with rifled barrels for firing slugs, there are many rounds specifically designed to be fired from a rifled barrel. A rifled barrel will increase the accuracy of the shotgun with slugs, but makes it unsuitable for firing shot, as the rifling causes the shot to form a hollow "O" shape. Including:

• Shotgun shell - Construction of a typical shotshell
• Shotgun shell - Shotshell sizes
• Shotgun shell - Shot sizes
• Shotgun shell - Birdshot
• Shotgun shell - Birdshot selection
• Shotgun shell - Buckshot
• Shotgun shell - Shotshells and patterning
• Shotgun shell - Narrower patterns
• Shotgun shell - Wider patterns

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Cobalt is a chemical element in the periodic table that has the symbol Co and atomic number 27. Cobalt - Notable characteristics. Cobalt is a hard ferromagnetic silver-white element. The Curie temperature is of 1388 K with 1.6~1.7 Bohr magnetons per atom. It is frequently associated with nickel, and both are characteristic ingredients of meteoric iron. Mammals require small amounts of cobalt salts. Cobalt-60, an artificially produced radioactive isotope of cobalt, is an important radioactive tracer a ...

Including:

• Cobalt - Notable characteristics
• Cobalt - Applications
• Cobalt - Use in medicine
• Cobalt - History
• Cobalt - Biological role
• Cobalt - Occurrence
• Cobalt - Compounds
• Cobalt - Isotopes
• Cobalt - Precautions

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Chenzhou(郴州), a city located in the southern area of Hunan province, in China. Major deposits of tungsten, bismuth and molybdenum make it the Home of Non-ferrous metals. The areas of interest in this region inculde: Wugai Mountain Hunting Field, Suxian Hill and Dongjiang Lake. It covers an area of 19,317 sq. kilometers and has a population of 4,510,000 . ...

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Gold is a chemical element in the periodic table that has the symbol Au (L. aurum) and atomic number 79. A soft, shiny, yellow, dense, malleable, ductile (trivalent and univalent) transition metal, gold does not react with most chemicals but is attacked by chlorine, fluorine and aqua regia. The metal occurs as nuggets or grains in rocks and in alluvial deposits and is one of the coinage metals. For millennia, gold has served as money and is also used in jewellery, dentistry, and in electronics. Gold forms t ...

Including:

• Gold - Notable characteristics
• Gold - Applications
• Gold - History
• Gold - Value
• Gold - Gold and the money supply
• Gold - Restrictions on gold ownership
• Gold - Return of a gold standard?
• Gold - Gold in investment portfolios
• Gold - Occurrence
• Gold - Production
• Gold - Compounds/isotopes
• Gold - Precautions
• Gold - Symbolism

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200 is the natural number following 199 and preceding 201. << 0 100 200 300 400 500 600 700 800 900 >> The number appears in the Padovan sequence, preceded by 86, 114, 151 (it is the sum of the first two of these). 200 is the smallest base 10 unprimeable number - it can not be turned into a prime number by changing just one of its digi ...

Including:

• 200 number - Other numbers in the 200s

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Clostridium difficile (pronunciation ▶ (help·info)) (also referred to as C. diff or C-diff) is a species of bacteria of the genus Clostridium which are gram-positive, anaerobic spore-forming rods. They cause pseudomembranous colitis, a severe infection of the colon, often after normal gut flora is eradicated by the use of antibiotics. Treatment is by stopping any antibiotics and commencing specific anticlostridial antibiotics, e.g. ...

Including:

• Clostridium difficile - Bacteriology
• Clostridium difficile - Characteristics
• Clostridium difficile - Toxins
• Clostridium difficile - Role in disease
• Clostridium difficile - Diagnosis and treatment
• Clostridium difficile - Pharmacotherapy
• Clostridium difficile - Recurrence
• Clostridium difficile - Notable outbreaks
• Clostridium difficile - Cracking of the genetic code of the Quebec strain
• Clostridium difficile - External link

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Pewter is a metal alloy, traditionally between 85 and 99 percent tin, with the remainder consisting of 1-4 percent copper, acting as a hardener, with the addition of lead for the lower grades of pewter. There were three grades: Fine, for eatingware, with 96-99 percent tin, and 1-4 percent copper; Trifle, also for eating and drinking utensils but duller in appearance, with 92 percent tin, 1-4 percent copper, and up to 4 percent lead; and Lay or Ley metal, not for eating or drinking utensils, which could contain up to 15 percent lead. Modern pewter mixes the tin with copper, ...

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When it is mixed or alloyed with beryllium, polonium can be a neutron source. Other uses; This element has also been used in devices that eliminate static charges in textile mills and other places. However, beta sources are more commonly used and are less dangerous. Polonium is used on brushes that remove accumulated dust from photographic films. The polonium in these brushes is sealed and controlled thus minimizing radiation hazards. ...

See also:

Polonium, Polonium - Notable characteristics, Polonium - Applications, Polonium - Polonium-210, Polonium - History, Polonium - Occurrence, Polonium - Isotopes, Polonium - Precautions

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Medical science has tried repeatedly to pinpoint the etiology, and many hypotheses were made, such as: Psychosomatic disease [1] Panic disorder [2] Chagas' disease [3] Ménière's disease Lactose intolerance [4] Lupus erythematosus [5] Arsenic poisoning Multiple allergy Hypochondria See also:

Charles Darwin's illness, Charles Darwin's illness - Development of illness and symptoms, Charles Darwin's illness - Possible causes, Charles Darwin's illness - Psychic causation, Charles Darwin's illness - The Chagas hypothesis, Charles Darwin's illness - Ménière's disease, Charles Darwin's illness - Other possible causes, Charles Darwin's illness - Combined causes, Charles Darwin's illness - Hereditary disease, Charles Darwin's illness - Contribution to Darwin's work, Charles Darwin's illness - Conclusions, Charles Darwin's illness - Notes and source

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Point-to-point construction uses terminal strips(sometimes know as 'tag boards'). A terminal strip is a stamped strip of tin-plated loops of copper. It is mounted in a way that electrically insulates it. Usually it is mounted on a cheap, heat-resistant material, usually brown bakelite or paxolin, or perhaps epoxy-resin bonded paper (ERBP). This material is mounted on a metal standoff with a mounting hole. The chassis was constructed first, from sheet metal or wood. Insulated terminal strips were then riveted, nailed or screwed ...

See also:

Point-to-point construction, Point-to-point construction - Terminal strip construction, Point-to-point construction - 'Dead bug' construction

Read more here: » Point-to-point construction: Encyclopedia II - Point-to-point construction - Terminal strip construction

Many reactor types were considered initially, however the list was downsized to focus on the most promising technolgies and those that could most likely meet the goals of the Gen IV intitiative. Three sytems are thermal reactors and three are fast reactors. The VHTR is also being researched for potentially providing high quality process heat for hydrogen production. The fast reactors offer the possibility of burning actinides to further reduce waste and of being able to breed more fuel than they consume. Generation IV reactor - Thermal reactors. See also:

Generation IV reactor, Generation IV reactor - Participating countries, Generation IV reactor - Reactor types, Generation IV reactor - Thermal reactors, Generation IV reactor - Fast reactors

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In ionic hydrides the hydrogen behaves as a halogen and obtains an electron from the metal to form a hydride ion (H-), thereby obtaining the stable electron configuration of helium or filling up the s-orbital. The other element is a metal more electropositive than hydrogen, usually one of the alkali metals or alkaline earth metals. The hydrides are called binary if they only involve two elements including hydrogen. Chemical formulae for binary ionic hydrides are either MH (as in LiH) or MH2 (as in MgH2). Gallium, indium, thallium and lanthanide hydrides are also ionic. < ...

See also:

Hydride, Hydride - Electronegativity convention, Hydride - Ionic hydrides, Hydride - Covalent hydrides, Hydride - Interstitial hydrides of the Transitional metals, Hydride - Usage

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In ionic hydrides the hydrogen behaves as a halogen and obtains an electron from the metal to form a hydride ion (H-), thereby obtaining the stable electron configuration of helium or filling up the s-orbital. The other element is a metal more electropositive than hydrogen, usually one of the alkali metals or alkaline earth metals. The hydrides are called binary if they only involve two elements including hydrogen. Chemical formulae for binary ionic hydrides are either MH (as in LiH) or MH2 (as in MgH2). Gallium, indium, thallium and lanthanide hydrides are also ionic. < ...

See also:

Hydride, Hydride - Ionic hydrides, Hydride - Covalent hydrides, Hydride - Interstitial hydrides of the Transitional metals, Hydride - Usage

Read more here: » Hydride: Encyclopedia II - Hydride - Ionic hydrides

A reddish ball was noticed by the inhabitants of the town at around 8 PM on that date. Eye-witnesses say that the ball was about the size of a half of the moon disc. The ball was flying parallel to the ground; there were no sounds accompanying the flight. It was later determined that the speed of the flying ball was approximately 15 m/s, and that it was hovering about 700-800 above the ground. When the ball reached Height 611, it started to decline and then fell down onto the hill. All but one wi ...

See also:

Height 611 UFO Incident, Height 611 UFO Incident - Incident description, Height 611 UFO Incident - Analysis, Height 611 UFO Incident - Further incidents

Read more here: » Height 611 UFO Incident: Encyclopedia II - Height 611 UFO Incident - Incident description

Magnetic levitation - Diamagnetism. A substance which is diamagnetic repels a magnetic field. Earnshaw's theorem does not apply to diamagnets since they behave in the opposite manner of a typical magnet (relative permeability μr < 1). All materials have diamagnetic properties, but the effect is very weak, and usually overcome by the object's paramagnetic or ferromagnetic properties. A material which is predominantly diamagnetic will be repelled by a magnet, although typical objects only feel a very ...

See also:

Magnetic levitation, Magnetic levitation - Methods, Magnetic levitation - Diamagnetism, Magnetic levitation - Superconductivity, Magnetic levitation - Feedback control systems, Magnetic levitation - Oscillating fields, Magnetic levitation - Gyroscopic motion

Read more here: » Magnetic levitation: Encyclopedia II - Magnetic levitation - Methods