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Articles On The Topic: "gold It"

Native gold occurs as very small to microscopic particles embedded in rock, often together with quartz or sulfide minerals such as "fool's gold", which is a pyrite.[69] These are called lode deposits. The metal in a native state is also found in the form of free flakes, grains or larger nuggets[68] that have been eroded from rocks and end up in alluvial deposits called placer deposits. Such free gold is always richer at the exposed surface of gold-bearing veins, owing to the oxidation of accompanying minerals followed by weathering; and by washing of the dust into streams and rivers, where it collects and can be welded by water action to form nuggets.

Articles on the topic: "gold it"

Aristotle in his ethics used gold symbolism when referring to what is now known as the golden mean. Similarly, gold is associated with perfect or divine principles, such as in the case of the golden ratio and the golden rule. Gold is further associated with the wisdom of aging and fruition. The fiftieth wedding anniversary is golden. A person's most valued or most successful latter years are sometimes considered "golden years". The height of a civilization is referred to as a golden age.[107]

Colloidal gold preparations (suspensions of gold nanoparticles) in water are intensely red-colored, and can be made with tightly controlled particle sizes up to a few tens of nanometers across by reduction of gold chloride with citrate or ascorbate ions. Colloidal gold is used in research applications in medicine, biology and materials science. The technique of immunogold labeling exploits the ability of the gold particles to adsorb protein molecules onto their surfaces. Colloidal gold particles coated with specific antibodies can be used as probes for the presence and position of antigens on the surfaces of cells.[189] In ultrathin sections of tissues viewed by electron microscopy, the immunogold labels appear as extremely dense round spots at the position of the antigen.[190]

I am a professor in the Desautels Faculty of Management, McGill University and have been an Associate Fellow at Green Templeton College, Oxford University for over 20 years. Before that I was on the Oxford University faculty from 1995 to 2000. I have also taught on executive education and MBA programs at Stanford, Harvard Business School, IMD, LBS, INSEAD, Oxford, McGill, USC, Duke, Darden, and Cambridge. I have authored 28 refereed journal articles, 10 books, and have over 3,600 Google Scholar citations. For the last 20 years I have worked with Henry Mintzberg. teaching on and running leadership programs.

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Some early printings of paper money were backed by gold held in safekeeping for every unit of money that was placed in circulation. The United States once used a "gold standard" and maintained a stockpile of gold to back every paper dollar in circulation.

The gold used as a financial backing for currency was most often held in the form of gold bars, also known as "gold bullion." The use of gold bars kept manufacturing costs to a minimum and allowed convenient handling and storage. Today many governments, individuals, and institutions hold investments of gold in the convenient form of bullion.

  • Gold is used as a drug to treat a small number of medical conditions. Here are examples: Injections of weak solutions of sodium aurothiomalate or aurothioglucose are sometimes used to treat rheumatoid arthritis.

  • Particles of a radioactive gold isotope are implanted in tissues to serve as a radiation source in the treatment of certain cancers.

  • Small amounts of gold are used to remedy a condition known as lagophthalmos, which is an inability of a person to close their eyes completely. This condition is treated by implanting small amounts of gold in the upper eyelid. The implanted gold "weights" the eyelid, and the force of gravity helps the eyelid close fully.

Gold has the highest malleability of any metal. This enables gold to be beaten into sheets that are only a few millionths of an inch thick. These thin sheets known as "gold leaf" can be applied over the irregular surfaces of picture frames, molding, or furniture.

OK, this one isn't a question but it raises an important issue. Some jewelry designers will refer to gold-filled items as just "gold." It is not gold. It is illegal to call gold-filled items gold or to abbreviate the description to just 12kt or 14kt. This implies they are a solid alloy with higher pure gold content. Gold-filled is a unique material that must be clearly distinguished from solid gold by professionals in the industry. "Gold" is not an acceptable shorthand and it can get you in legal trouble for fraud. Don't get into this bad habit.

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