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Patina also refers to accumulated changes in surface texture and color that result from normal use of an object such as a coin or a piece of furniture over time. [3] Archaeologists also use the term patina to refer to a corticated layer that develops over time that is due to a range of complex factors on flint tools and ancient stone monuments. [1]
For example, you may pronounce cot and caught the same, do and dew, or marry and merry. This often happens because of dialect variation (see our articles English phonology and International Phonetic Alphabet chart for English dialects). If this is the case, you will pronounce those symbols the same for other words as well. [1]
Unlike wear patina necessary in applications such as copper roofing, outdoor copper, bronze, and brass statues and fittings, chemical patina is considered a lot more uneven and undesirable. [2] Patina is the name given to tarnish on copper-based metals, while toning is a term for the type of tarnish which forms on coins.
With use, donabe develop a patina of crackling of the interior glaze called kannyu. This patina is valued as a sign of character. [5]: 9 If properly treated, these pots should last for decades and a few special ones have survived for centuries.
Most of the world’s top corporations have simple names. Steve Jobs named Apple while on a fruitarian diet, and found the name "fun, spirited and not intimidating." Plus, it came before Atari in ...
Differences in pronunciation between American English (AmE) and British English (BrE) can be divided into . differences in accent (i.e. phoneme inventory and realisation).See differences between General American and Received Pronunciation for the standard accents in the United States and Britain; for information about other accents see regional accents of English.
Speakers of non-rhotic accents, as in much of Australia, England, New Zealand, and Wales, will pronounce the second syllable [fəd], those with the father–bother merger, as in much of the US and Canada, will pronounce the first syllable [ˈɑːks], and those with the cot–caught merger but without the father–bother merger, as in Scotland ...
The black patina is a mixture of zinc oxide and copper(II) oxide (Cu 2 O). It is the copper oxide that gives the patina its black color (zinc oxide is white). The ammonium chloride that is applied to the bidriware selectively dissolves the zinc on the surface of the brass, leaving a copper-rich surface that is oxidized by the potassium nitrate. [7]