Copper and tin ores are rarely found together ( exceptions include one ancient site in Thailand and one in Iran ), so serious bronze work has always involved trade.

Copper – hydrogen peroxide has been suggested as an alternative to the current recommendation of sodium hydroxide or sodium hypochlorite.

Copper deposition of the metal has been done mostly by electroplating, in order to reduce the cost.

Inorganic compounds show rich variety: A: Diborane features Three-center two-electron bond | unusual bonding B: Caesium chloride has an archetypal crystal structure C: Cyclopentadienyliron dicarbonyl dimer | Fp < sub > 2 </ sub > is an Organometallic chemistry | organometallic complex D: Polydimethylsiloxane | Silicone's uses range from breast implant s to Silly Putty E: Grubbs ' catalyst won the Nobel Prize in Chemistry | 2005 Nobel Prize for Robert H. Grubbs | its discoverer F: Zeolite s find extensive use as molecular sieve s G: Copper ( II ) acetate surprised Theoretical chemistry | theoreticians with its diamagnetism

If Gold Silver Copper Standard is involved, expect gold to be even more powerful, while silver still has its own powers.

Copper output has increased steadily since 2004, due to higher copper prices and the opening of new mines.

Copper thermite has industrial uses in e. g. welding of thick copper conductors (" cadwelding ").

" As the foregoing source indicates, " Copper Island " has sometimes been used as a sobriquet for Michigan's " copper country.

* Copper circa 1990, apparently arising from market manipulation by Yasuo Hamanaka of Sumitomo Corporation in what has come to be called the " Sumitomo copper affair ".

A large stretch of this coastline, known as the Copper Coast has been designated as a UNESCO Geopark, a place of great geological importance.

The alpine climate of the mountainous regions of Copper Canyon has moderate temperatures from October to November and March to April.

A specific project being considered under the UK Biodiversity Action Plan is re-introduction of the Large Copper butterfly, whose habitat has been reduced by reduction of fens.

She also has elements associated with the goddesses of Myceneae, the Minoans of Crete, and certain Kassite goddesses of the metals trade in Tin, Copper and Bronze between Lothal and Dilmun.

In 2007, in what has been noted as the world's biggest-ever mining takeover, Freeport-McMoRan Copper & Gold bought Phelps Dodge Mining and has begun some preliminary work in the area.

The town has a main shopping center named Copper Plaza, with a small Bashas ' grocery store and other businesses.

Copper has been in use at least 10, 000 years, but more than 95 % of all copper ever mined and smelted has been extracted since 1900.

Kopparverket ( The Copper Works ) at Riddarhyttan has seen industrial activity since the Middle Ages.

Traditional ranches are still found in the area, but Copper Canyon has become primarily a bedroom community with little commercial development.

He has ordered a custom " prototype " Copper Lacquer Specialty with Chrome Hardware.

However, after defeating many more than twenty knights ( with the aid of his foster mother, the Lady of the Lake ), he discovers that the Copper Knight has fled.

As of February 2012, it has been established that Spinney will be the subject of a full-length documentary by Copper Pot Pictures called I Am Big Bird: The Caroll Spinney Story, set to be released in 2013.

UNESCO has named the mining area of the Stora Kopparberg (" Great Copper Mountain ") in Falun a World heritage site.

Copper smelting may have been invented in separate parts of Asia and Europe at that time or spread from an initial source by long-distance trade.

Copper alloys have been known since prehistory — bronze gave the Bronze Age its name — and have many applications today, most importantly in electrical wiring.

Copper alloys have been known for a long time ( since the Bronze Age ), while the alloys of the other three metals have been relatively recently developed.

Many masterpieces have also been found at the Royal Cemetery at Ur ( c. 2650 BC ), including the two figures of a Ram in a Thicket, the Copper Bull and a bull's head on one of the Lyres of Ur.

Copper ingots shaped like oxhides have been recovered from shipwrecks such as at Ulu Burun, Iria and Cape Gelidonya which attest to the widespread metal trade.

The original inhabitants are believed to have been members of Paleo-Indian cultures, followed by the " Old Copper " people, who hunted with spear points and knives and fished with metal hooks.

The original settlers in the Yakutat area are believed to have been Eyak-speaking people from the Copper River area.

A Keweenaw Water Trail has been established around Copper Island.

“ The Tanana Crossing people have always been in much closer contact with the Indians of Copper River, the valley of the Tok leading to the easy Mentasta Pass and thence down Slana River to the Copper.

Copper ingots from Oman and bitumen which occurred naturally in Mesopotamia may have been exchanged for cotton textiles and domestic fowl, major products of the Indus region that are not native to Mesopotamia.

Copper and manganese have been found in General Tinio, Carranglan, and Pantabangan.

The Copper Country is largely rural, and much of it has been designated as state parks or similar designations.

In the area surrounding Lugano, items from the Copper Age and the Iron Age have been found.

Copper has been mined for centuries at Chuquicamata as was shown by the discovery in 1899 of " Copper Man ", a mummy dated at about 550 A. D. which was found trapped in an ancient mine shaft by a fall of rock.

Copper has been mined for centuries at Chuquicamata as was shown by the discovery in 1898 of " Copper Man ", a mummy dated at about 550 A. D. which was found trapped in an ancient mine shaft by a fall of rock.

In Inside Africa, John Gunther describes one of these, the Societe Generale, as `` the kind of colossus that might be envisaged if, let us say, the House of Morgan, Anaconda Copper, the Mutual Life Insurance Company of New York, the Pennsylvania Railroad, and various companies producing agricultural products were lumped together, with the United States government as a heavy partner ''.

The Copper Age features the use of copper, excluding bronze ; moreover, stone continued to be used in a minor industry throughout both the Bronze Age and the Iron Age.

After several years a number of complainants appeared in the literature that Eneolithic seemed to the untrained eye to be produced from e-neolithic, " outside the Neolithic ," clearly not a definitive characterization of the Copper Age.

During prehistoric times there was a succession of cultures that flourished in the land of present-day Moldova from the end of the Ice age up through the Neolithic Age, the Copper Age, the Bronze Age, and the beginning of the Iron Age, when historical records begin to be made about the people who lived in these lands.

Using Copper or CPU register manipulations, each sprite ' channel ' can be reused multiple times in a single frame to increase the total sprites per frame.

Although Holmes appears to show initial interest in some female clients ( in particular, Violet Hunter in " The Adventure of the Copper Beeches "), Watson says he inevitably " manifested no further interest in the client when once she had ceased to be the centre of one of his problems ".

The first batch of Adnams Copper House Distillery Whisky will be released in November 2013.

As a standard underlying medium it uses optical fiber, although it can use copper cable, in which case it may be referred to as CDDI ( Copper Distributed Data Interface ).

Copper wires in a cable may be bare, or they may be plated with a thin layer of another metal, most often tin but sometimes gold, silver or some other material.

Copper disappears gradually, and by the middle of the third century, with Rome's economy in crisis, the Antonianus will be the only official currency.

Copper thermite can be prepared using either copper ( I ) oxide ( red ) or copper ( II ) oxide ( black ).

Nevertheless, " unquestionably " Finns in those locales considered themselves to be " Copper Islanders.

He proposes to catch most of the condensed Steam by making it strike against broad Copper plates & the condensed part trickling down may be caught and returned into its Boiler or other reservoir.

Copper foil thickness can be specified in ounces per square foot or micrometres.

Copper thickness of PCBs can be specified in units of length, but is often specified as weight of copper per square foot, in ounces, which is easier to measure.

Copper sulfate and Bordeaux mixture ( copper sulfate plus lime ), approved for organic use in various jurisdictions, can be more environmentally problematic than some synthetic fungicides dissallowed in organic farming Similar concerns apply to copper hydroxide.

The English name Chisana derives from the Ahtna Athabascan name Tsetsaan ' Na ', meaning literally ' copper river ' ( not to be confused with the river known in English as the Copper River ).

* Copper Queen Mine was once a major copper producer and can be toured daily.

The mine could not be profitably operated at the time and little was done with it until the Winona Copper Company was organized in 1898 and assumed ownership of the earlier mine.

The tip of the Keweenaw is said to be in the Copper Country and on the Copper Island.