Platinum box case report

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Platinum box case report

Chemistry in its element: End promo Chris Smith Hello - blonde hair, expensive jewellery, a new generation of catalysts and anti cancer drugs plus a mistake that cost the Spanish conquistadors very dear. Have you spotted the connection yet? If not, here's Katherine Haxton. Katherine Haxton Platinum as a metal speaks of prestige, value and power.

An album has gone platinum, platinum wedding anniversaries, and highly prized platinum jewellery such as rings and Rolex watches. Platinum is a very different substance to a chemist.

Platinum metal is silvery white and does not oxidise, properties that make it highly appealing for jewellery. It is more precious than silver but with prices more volatile than gold. Platinum has broad chemical resistance although the metal may be dissolved in aqua regia, a highly acidic mixture of nitric and hydrochloric acids, forming chloroplatinic acid, and has an extremely high melting point in excess of two thousand degrees centigrade.

Spanish conquistadors in the 16th century viewed platinum as a nuisance, a white metal obtained while panning for gold and difficult to separate from the gold. It was named Platina, a diminutive of Plata, the Spanish word for silver. Platina was believed to be unripe gold, and was flung back into the rivers in the hope that it would continue to mature into gold.

There is anecdotal evidence of gold mines being abandoned due to platinum contamination. Platinum's properties allowed it to defy identification and classification until the 18th century. Its high melting point and broad chemical resistance meant that obtaining a pure sample of the metal was difficult.

Platinum's place as a precious metal was first established in the 18th century by Henrik Sheffer, who succeeded in melting or fusing platinum by adding arsenic. Three chemists, Lavoisier, Seguin and Musnier began working together in the late 18th century to improve the design of their furnaces to enable platinum to be melted without the need of fluxes such as arsenic.

The French Chemist Lavoisier wrote for help from Josiah Wedgewood, the founder of Wedgewood pottery, asking for a clay that could be used to manufacture vessels that could withstand the high temperatures needed to melt platinum.

Seguin later requested details of which fuel could burn sufficiently hot enough, and for further details on creating the hottest flame possible.

Upper Deck THE CUP Hockey 6 Box Case Random Teams #5. $ Spots Left: Platinum TV Box, Titanium TV Box, Grand TV Box Platinum TV Box Titanium TV Box Grand TV Box I never received box and did not get a refund Los Angeles California Platinum tv attheheels.com They made claim of a tv android box that did not perform as advertised. We report the case of a patient of pericardial mesothelioma metastatic to the liver who had a good response to pemetrexed and carboplatin-based combination chemotherapy, and consequent prolonged continuing survival at the time of the dispatch of this report.

Lavoisier succeeded in melting platinum using oxygen to enhance the heat of the furnace but it would still be many years before a process could be found to produce commercial quantities.

Of course, that was prior to Lavoisier's beheading at the height of the French Revolution in Janety had managed to develop a means of producing workable platinum using arsenic, and a way to remove the arsenic afterwards with limited success.

It is ironic that the very properties that make platinum metal so desirable caused so many difficulties for its discoverers. King Louis XVI of France believed that platinum metal was only fit for Kings, due in part to the difficulties in working with pure samples.

Ina method for melting up to 15 kilograms of platinum using a furnace lined with lime and oxygen and coal gas as fuel was described by Deville and Debray.

About Platinum TV Box

The 19th century also saw the development of the first fuel cell using platinum electrodes. Fuel cells produce electricity through electrochemical reactions, often using platinum as non-reactive electrodes, and represent an important area of research into environmentally friendly technologies and cleaner, greener sources of energy today.

The very properties of platinum that had made it so hard to work with became valued and platinum was used for lab equipment, and other applications where its broad chemical resistance was required.

Johnson Matthey perfected the techniques of separating and refining the platinum group metals and in Matthey produced a standard metre measure made of a platinum and iridium alloy. Platinum compounds have been well documented, perhaps none more so than cis-diamminedichloroplatinum IIcisplatin.

In the early s, Barnett Rosenberg was conducting experiments on bacteria, measuring the effects of electrical currents on cell growth. It was observed that the E. Further investigation revealed a number of platinum compounds were being formed due to reaction of the buffer and platinum electrode and subsequent characterization of these compounds isolated cisplatin.

Cisplatin was found to inhibit cell division thus causing the elongation of the bacteria, and was tested in mice for anticancer properties.May 09,  · To apply to become a member of our exclusive breaking group, visit our website at attheheels.com and apply to be a member!

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Platinum box case report

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