Next to it is a copper section, with cooking utensils and a figure of the chief cook in an elaborate, floor-length robe.

The Belgians were interested primarily in the economic development of the Congo, which is rich in copper, tin, cobalt, manganese, zinc, and uranium, and cotton and palm oil.

The main use of metallic arsenic is for strengthening alloys of copper and especially lead ( for example, in car batteries ).

Wilson's disease is an autosomal-recessive gene disorder whereby an alteration of the ATP7B gene results in an inability to properly excrete copper from the body.

Brass is an alloy made from copper and zinc.

Eventually, humans learned to smelt metals such as copper and tin from ore, and, around 2500 BC, began alloying the two metals to form bronze, which is much harder than its ingredients.

There is a long history of mining in the Andes, from the Spanish silver mines in Potosí in the 16th century to the vast current porphyry copper deposits of Chuquicamata and Escondida in Chile and Toquepala in Peru.

The zinc, which is higher than both copper and hydrogen in the electrochemical series, reacts with the negatively charged sulfate ( SO < sub > 4 </ sub >< sup > 2 −</ sup >).

"... Turquoise was chosen because the greenish-blue stone is indigenous to Arizona, copper because Arizona is one the nation's top copper-producing states and purple because it has become a favorite color for Arizona sports fans, thanks to the success of the National Basketball Association's Phoenix Suns.

The presence of copper in this qualitative analysis is indicated by the bluish-green color of the flame.

The driving band is usually made of copper, but synthetic materials have also been used.

Brass is an alloy of copper and zinc ; the proportions of zinc and copper can be varied to create a range of brasses with varying properties.

By comparison, bronze is principally an alloy of copper and tin.

The U. S. Department of Defense investigation contract, which is ongoing, will also evaluate the effectiveness of copper alloy touch surfaces to prevent the transfer of microbes to patients and the transfer of microbes from patients to touch surfaces, as well as the potential efficacy of copper-alloy based components to improve indoor air quality.

This observation, and the fact that kill timeframes shorten as the percentage of copper in an alloy increases, is proof that copper is the ingredient in brass and other copper alloys that kills the microbes.

The mechanisms of antimicrobial action by copper and its alloys, including brass, is a subject of intense and ongoing investigation.

It is believed that the mechanisms are multifaceted and include the following: 1 ) Potassium or glutamate leakage through the outer membrane of bacteria ; 2 ) Osmotic balance disturbances ; 3 ) Binding to proteins that do not require or utilize copper ; 4 ) Oxidative stress by hydrogen peroxide generation.

Research is being conducted at this time to determine whether brass, copper, and other copper alloys can help to reduce cross contamination in public facilities and reduce the incidence of nosocomial infections ( hospital acquired infections ) in healthcare facilities.

One young girl told me how her mother removed a wart from her finger by soaking a copper penny in vinegar for three days and then painting the finger with the liquid several times.

The dissolved copper ( Cu < sup > 2 +</ sup >) ions are removed from the solution by ligand exchange solvent extraction, which leaves other ions in the solution.

When the reformer King Hezekiah came to the throne of Judah in the late 8th century BCE, " He removed the high places, broke the sacred pillars, smashed the idols, and broke into pieces the copper snake that Moses had made: for unto those days the children of Israel did burn incense to it: and he called it Nehushtan.

The unwanted copper is removed by various methods leaving only the desired copper traces, this is called subtractive.

Many companies processed the massive piles of " overburden " that had been removed from copper mines, or expanded the existing open-pit mines to extract the gold ore. Gold mines as widespread as the Robinson project near Ruth, and AmSelco's Alligator Ridge mine from Ely, kept the town alive during the 1980s and 1990s, until the recent revival of copper mining.

* West Coast Wilderness Railway in Tasmania, originally opened in 1896 to service the Mount Lyell copper mine and closed and completely removed in 1960s.

Over three million tons of ore were removed and refined into 14, 500 tons of copper and 20, 000 tons of nickel.

During the sack of 1204, the Crusaders looted the city and, among other things, removed the copper quadriga that stood above the carceres ; it is now displayed at St. Mark's Cathedral in Venice.

Because the last ice age removed the top sediment layer of the soil, the Kola Peninsula is on the surface extremely rich in various ores and minerals, including apatites and nephelines ; copper, nickel, and iron ores ; mica ; kyanites ; ceramic materials, as well as rare earth elements and non-ferrous ores.

This removed free competition and therefore kept prices down ; as British companies, the main copper producers were also subject to the Excess Profits Tax.

After her departure for Paris, the papal authorities discovered that her unruly servants not only had stolen the silver, tapestries, and paintings, but also had " smashed up doors for firewood " and removed sections of copper roofing.

Large amounts of a conglomerate rock bed needed to be removed before the copper ore located more deeply could be reached.

Dhul-Qarnayn then makes a wall of copper and iron to keep Gog and Magog out, but warns that it will be removed in the Last Age.

In the case of firestops, cable jacketing is usually removed within the seal and firestop rubber modules are internally fitted with copper shields, which contact the cables ' armour in order to ground the seal.

Cover has been removed to show copper windings and brush.

In July 2008, in a raid suspected to be connected with the rise in the value of scrap metal, one of the stationary engines was cut up and the copper wire and iron housing removed, with the damage caused rendering it beyond repair.

Deionized water, also known as demineralized water ( DI water, DIW or de-ionized water ), is water that has had its mineral ions removed, such as cations from sodium, calcium, iron, and copper, and anions such as chloride and sulfate.

Once the object was taken out of the cast, it was burned and as a consequence, copper from the surface of the object was oxidized to copper oxide and was then removed mechanically.

When looking through a microscope, one may clearly see the empty spots from where the original elements copper and silver were removed.

Metals that have a poorer affinity for oxygen than iron, such as nickel and copper, cannot be removed through oxidation and must be controlled through scrap chemistry alone, such as introducing the direct reduced iron and pig iron mentioned earlier.

To wire the system, the ballast resistor wire feeding the points-type coil needs to be removed and replaced with regular copper wire.

Together they also developed a new form of voltaic cell in which the wooden trough was replaced by one of copper, thereby producing stronger currents.

Bronze, an alloy of copper and tin, was the first alloy discovered, during the prehistoric period now known as the bronze age ; it was harder than pure copper and originally used to make tools and weapons, but was later superseded by metals and alloys with better properties.

Many alloys of aluminium, copper, magnesium, titanium, and nickel can be strengthened to some degree by some method of heat treatment, but few respond to this to the same degree that steel does.

The spread of the Akkadian state as far as the " silver mountain " ( possibly the Taurus Mountains ), the " cedars " of Lebanon, and the copper deposits of Magan, was largely motivated by the goal of securing control over these imports.

Analog television may be wireless or can require copper wire used by cable converters.

Sakharov later suggested to replace the copper coil in MK generators by a big superconductor solenoid to magnetically compress and focus underground nuclear explosions into a shaped charge effect.

AMD's new fab in Dresden came online, allowing further production increases, and the process technology was improved by a switch to copper interconnects.

Subsequent experiments by research groups around the world reconfirmed the antimicrobial efficacy of brass, as well as copper and other copper alloys ( see Antimicrobial copper-alloy touch surfaces ).

The earliest brasses may have been natural alloys made by smelting zinc-rich copper ores.

It was eventually replaced by speltering, the direct alloying of copper and zinc metal which was introduced to Europe in the 16th century.

These may be " natural alloys " manufactured by smelting zinc rich copper ores in reducing conditions.

This seems to have been encouraged by exports and influence from the Middle-East and eastern Mediterranean where deliberate production of brass from metallic copper and zinc ores had been introduced.

The 4th century BC writer Theopompus, quoted by Strabo, describes how heating earth from Andeira in Turkey produced " droplets of false silver ", probably metallic zinc, which could be used to turn copper into oreichalkos.

Brass was produced by the cementation process where copper and zinc ore are heated together until zinc vapor is produced which reacts with the copper.

However it is now thought this was probably a deliberate change in composition and overall the use of brass increases over this period making up around 40 % of all copper alloys used in the Roman world by the 4th century AD.

Disruption in the trade of tin for bronze from Western Europe may have contributed to the increasing popularity of brass in the east and by the 6th – 7th centuries AD over 90 % of copper alloy artefacts from Egypt were made of brass.

Eventually it was discovered that metallic zinc could be alloyed with copper to make brass ; a process known as speltering and by 1657 the German chemist Johann Glauber had recognised that calamine was " nothing else but unmeltable zinc " and that zinc was a " half ripe metal.

" However some earlier high zinc, low iron brasses such as the 1530 Wightman brass memorial plaque from England may have been made by alloying copper with zinc and include traces of cadmium similar those found in some zinc ingots from China.