first used by the Chinese. There is a mention of Silver – Mercury paste by Su Kung (A.D. 659) in the Chinese materia medica • 1826 – introduction of Silver – Mercury paste (pated`argent) by Peter O. Taveau of Paris‚ France History • 1833 – Crawcour brothers introduce amalgam to US • powdered silver coins mixed with mercury – expanded on setting • 1895 – G.V. Black develops formula for modern amalgam alloy • 67% silver‚ 27% tin‚ 5% copper‚ 1% zinc – overcame expansion
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Kwabena Asomaning Post Office Box ST 55‚ STC Accra. Ghana T: + 233 26 2 797 443 / + 233 24 4 797 443 E: kwasomaning@gmail.com ………………………………………………………………………………………………….. Profile / Key Strengths • Highly skilled in teaching‚ research and personnel training • Skilled in people management • Dynamic and a quick on-the-job learner • Excellent presentation and communication skills • A good team player‚ results oriented and highly innovative Hobbies / Social Life • Dedicated to sports; swimming‚ tennis
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very ductile and malleable with a high tensile strength. It has been used in jewelry‚ dentistry‚ Xray equipment‚ medical and surgical instruments and heating units. Due to its relative inactivity‚ platinum both as a free metal and alloyed with rhodium‚ is an almost indispensable material for such devices as magneto contacts‚ spark plug electrodes‚ radar parts‚ bomb sights‚ and computing devices. In the chemical industries‚ platinum
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Project on : Study of Constituents of Alloys INDEX |NAME |PAGE NO. | | | | |ACKNOWLEDGEMENT
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Katerina Baeza Hernandez | | | | | | | |Zn |Mg |Cu |Pb | | |(+) clear liquid but the |(+) a black spot appeared on|(-) no reaction occurred |(-) no reaction | |Pb(NO3)2
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Hansa traded with Swahili cities along the coast of East Africa. Swahili cities had attracted many cultures looking for spices‚ gold‚ and other goods. Both Hansa and Swahili dominated in trade. The most valuable items to trade were gold‚ silver‚ and spices. (Doc 1) Coins discovered in Swahili Cities. This document shows the coins found from the classical era up until 1450 C.E in Swahili cities. Most of the coins were found in Sung china‚ a total of 212 coins were found. The least amount
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Manual soldering uses a soldering iron or soldering gun.Alloys that melt between 180 and 190 °C (360 and 370 °F) are the most commonly used. Soldering performed using alloys with a melting point above 450 °C (840 °F) is called ’hard soldering’‚ ’silver soldering’‚ or brazing. For certain proportions an alloy becomes eutectic and melts at a single temperature; non-eutectic alloys have markedly different HYPERLINK "http://en.wikipedia.org/wiki/Solidus_(chemistry)" \o "Solidus (chemistry)" solidusand
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Extracting sliver from used X-ray films using new techniques SUMMARY Silver is one of the precious metals that exists as silver halides and dark silver in X-ray films therefore recycling it is essential. I decided to carry out my research in the field of extracting silver from used X-ray films using new technique that dose not deplete ant metallic resources or energy resources meaning that the project must be environmentally friendly. My research consists of two parts‚ part one which is carrying
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depression. Farmers needed more land to compensate for the price. Also happening during this time was the drastic change between gold and silver currency. The change was creating chaos. When gold became scarce‚ government took it upon themselves to make silver the new form of currency. In Document A‚ The Platform of the People’s (populist) party‚ it states that silver being the new currency as opposed to gold made the value of property and labor go down. Thus only adding to the difficulties farmers had
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Shanghai Free Trade Zone(SFTZ) officially known as the China (Shanghai) Pilot Free-Trade Zone was officially launched on September 29‚2013. With the backing of Chinese Premier Li Ke Qiang‚ Mainland China formed its first ever free trade zone. Personally‚ I feel that the establishment of the SFTZ is a stepping stone for China to boost their economy as well as creating more innovative and realistic systems to maintain its country’s competitiveness. SFTZ is a necessity for China to boost global cooperation
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