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When first cultivated, carrots were grown for their aromatic leaves and seeds rather than their roots. Carrot seeds have been found in Switzerland and Southern Germany dating back to 2000–3000 BC. [17] Some close relatives of the carrot are still grown for their leaves and seeds, such as parsley, coriander (cilantro), fennel, anise, dill and ...
The carotenes themselves take their name from the carrot. [32] Autumn leaves also get their orange colour from carotenes. When the weather turns cold and production of green chlorophyll stops, the orange colour remains. Before the 18th century, carrots from Asia were usually purple, while those in Europe were either white or red.
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The first synthetic dyes were discovered in the mid-19th century, starting with William Henry Perkin's mauveine in 1856, an aniline dye derived from coal tar. [67] Alizarin, the red dye present in madder, was the first natural pigment to be duplicated synthetically, in 1869, [68] leading to the collapse of the market for naturally grown madder ...
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Carrots were originally purple, white, red, and black — not orange. It wasn't until the 16th century that orange carrots were cultivated. ... Volleyball and basketball were both invented in ...
The first was developed by BASF and is based on the Wittig reaction with Wittig himself as patent holder: [22] [23] Carotene synthesis by Wittig. The second is a Grignard reaction, [24] elaborated by Hoffman-La Roche from the original synthesis of Inhoffen et al. They are both symmetrical; the BASF synthesis is C20 + C20, and the Hoffman-La ...
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