| Ivan Midzic, roden 6. travnja 1976. u Osijeku. Diplomirao kiparstvo na Akademiji likovnih umjetnosti u Zagrebu u klasi prof.Sime Vulasa 2002. godine. Proveo studijski semestar na Indiana University of Pennsylvania pod mentorstvom prof.dr.James Nestora. Magistrirao na Akademiji za likovno umetnost u Ljubljani pod mentorstvom prof.Joze Barsija. Dobitnik nagrade Vijeca akademije likovnih umjetnosti u Zagrebu 2002. godine. Clan HDLU Zagreb, HZSU-a i SOS Pittsburgh. | ![]() |
Ivan Midzic, born 6th of April 1976. in Osijek, Croatia. Graduated sculpture 2002. on the Academy of Fine Arts in Zagreb in the class of prof.Sime Vulas. During study spent semestar (fall 2000.) on Indiana University of Pennsylvania with prof.dr.James Nestor as e mentor. Master degree in Arts at ALU Ljubljana, mentor prof.Joze Barsi. Member of Society of Sculptors Pittsburgh, HDLU and HZSU Zagreb. Awarded by council of Academy of Fine Arts in Zagreb. |
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Copper
is a reddish-coloured metal, it is a chemical element in the periodic table
that has the symbol Cu (Latin: cuprum) and atomic number 29. Copper occupies
the same family of the periodic table as silver and gold, because it shares
many characteristics with these metals, all have very high thermal and electrical
conductivity, and all are malleable metals. Civilizations in places like Iraq, China, Egypt, Greece and the Sumarian cities all have early evidence of using copper. A copper pendant was found in what is now northern Iraq that dates to 8700 BC. During the Roman Empire, copper was principally mined on Cyprus, hence the origin of the name of the metal as Cyprium, "metal of Cyprus", later shortened to Cuprum. Copper is an essential nutrient to all higher plants and animals. In animals, it is found primarily in the bloodstream, as a cofactor in various enzymes, and in copper-based pigments. |
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Iron (IPA: /____(r)n/) is a
chemical element with the symbol Fe (Latin: ferrum) and atomic number 26. Iron is a metal extracted from iron ore, and is almost never found in the free elemental state. Iron is the second most abundant metal on Earth (the first being aluminium), and is believed to be the tenth most abundant element in the universe. Iron is also the second most abundant element by mass, making up 34% of the mass of the Earth; the concentration of iron in the various layers of the Earth ranges from high at the inner core to about 5% in the outer crust. The large amount of iron in the Earth is thought to create its magnetic field. Iron is the most used of all the metals, comprising 95% of all the metal tonnage produced worldwide. Steel is the best known alloy of iron. The first signs of use of iron come from the Sumerians and the Egyptians, where around 4000 BCE [citation needed], a few items, such as the tips of spears, daggers and ornaments, were being fashioned from iron recovered from meteorites [citation needed]. Because meteorites fall from the sky, some linguists have conjectured that the English word iron (OE _sern), which has cognates in many northern and western European languages, derives from the Etruscan aisar which means "the gods". |
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Aluminium (IPA: /_alj__m_ni_m,
-__m_ni_m/) or aluminum (IPA: /__lu_m_n_m/, see the "Spelling"
section below) is a silvery and ductile member of the poor metal group of
chemical elements. In the periodic table it has the symbol Al and atomic
number 13. Although aluminium is the most abundant metallic element in Earth's crust (believed to be 7.5% to 8.1%), it is very rare in its free form, occurring in oxygen-deficient environments such as volcanic mud, and it was once considered a precious metal more valuable than gold. Napoleon III of France had a set of aluminium plates reserved for his finest guests. Others had to make do with gold ones. Aluminium has been produced in commercial quantities for just over 100 years. [citations needed] Recovery of the metal via recycling has become an important facet of the aluminium industry. Recycling involves melting the scrap, a process that uses only five percent of the energy needed to produce aluminium from ore.[6] Recycling was a low-profile activity until the late 1960s, when the growing use of aluminium beverage cans brought it to the public consciousness. Aluminium is an excellent reflector (approximately 99%) of visible light and a good reflector (approximately 95%) of infrared. Chinese were using aluminium to make things as early as 300 AD. The ancient Greeks and Romans used aluminium salts as dyeing mordants and as astringents for dressing wounds; alum is still used as a styptic. |
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Brass is the term used for alloys
of copper and zinc, the amount of zinc varying from 5 to 45 percent to create
a range of brasses each with unique properties Brass has a yellow color,
somewhat similar to gold. It is relatively resistant to tarnishing, and
is often used as decoration. Brass has been known to man since prehistoric times, long before zinc itself was discovered. It was produced by melting copper together with calamine, a zinc ore. During this process, the zinc is extracted from the calamine and mixes with the copper. Pure zinc, on the other hand, is too reactive to have been produced by ancient metalworking techniques. |
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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 prosthetic groups.
In addition, there are over a dozen types of cells in the human body that
secrete zinc ions, and the roles of these secreted zinc signals in medicine
and health are now being actively studied. Intriguingly, brain cells in
the mammalian forebrain are one type of cell that secretes zinc, along with
its other neuronal messenger substances. Cells in the salivary gland, prostate,
immune system and intestine are other types that secrete zinc. In ancient India the production of zinc metal was very common. Many mine sites of Zawarmaala were active even during 1300-1000 BC. There are references of medicinal uses of zinc in the Charaka Samhita (300 BC). The Rasa Ratna Samuccaya (800 AD) explains the existence of two types of ores for zinc metal, one of which is ideal for metal extraction while the other is used for medicinal purpose. [3] Zinc alloys have been used for centuries, as brass goods dating to 1000–1400 BC have been found in Israel 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. Smelting and extraction of impure forms of zinc was accomplished as early as 1000 AD in India and China. In the West, impure zinc as a remnant in melting ovens was known since Antiquity, but usually discarded as worthless. |
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Silver (IPA: /_s_lv_/) is a
chemical element with the symbol Ag (Latin: argentum). A soft white lustrous
transition metal, it has the highest electrical and thermal conductivity
of any metal and occurs in minerals and in free form. This metal is used
in coins, jewelry, tableware, photography, and in mirrors. Silver is a very ductile and malleable univalent coinage metal with a brilliant white metallic luster that can take a high degree of polish. It has the highest electrical conductivity of all metals Silver has been used for thousands of years for ornaments and utensils, for trade, and as the basis for many monetary systems. Its value as a precious metal was long considered second only to gold. In Ancient Egypt and Medieval Europe, it was often more valuable than gold. Associated with the moon, as well as with the sea and various lunar goddesses, the metal was referred to by alchemists by the name luna. One of the alchemical symbols for silver is a crescent moon with the open part on the left. Hippocrates, the father of modern medicine, wrote that silver had beneficial healing and anti-disease properties, and the Phoenicians used to store water, wine, and vinegar in silver bottles to prevent spoiling. Before the advent of antibiotics silver compounds were used successfully to prevent infection. |