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As benzene is ubiquitous in gasoline and hydrocarbon fuels that are in use everywhere, human exposure to benzene is a global health problem. Benzene targets the liver, kidney, lung, heart and brain and can cause DNA strand breaks and chromosomal damage, hence is teratogenic and mutagenic. Benzene causes cancer in animals including humans.
One might summarize the timeline in the following way: the first 50 years were focused on the internal combustion engine and on refinery operations and, post 1970, emphasis has been placed on safety and automobile emissions. [19] 1900-1910 invention of spray carbeurator allowed use of "straight run gasoline" with vehicles.
An image from John Dalton's A New System of Chemical Philosophy, the first modern explanation of atomic theory.. This timeline of chemistry lists important works, discoveries, ideas, inventions, and experiments that significantly changed humanity's understanding of the modern science known as chemistry, defined as the scientific study of the composition of matter and of its interactions.
Two different types of Suave aerosol deodorants were voluntary recalled for containing benzene, a human carcinogen. Here's what you need to know. What is the carcinogen benzene?
This system of chemical notation—in which the elements were given simple written labels, such as O for oxygen, or Fe for iron, with proportions denoted by numbers—is the same basic system used today. The only difference is that instead of the subscript number used today (e.g., H 2 O), Berzelius used a superscript (H 2 O).
Timelines by year are timelines for one particular year that show the developments for that year within the topical area of that timeline. Lists of years or Tables of years are indexes that list all of the individual timelines by year that pertain to a specific topic.
1928 - Kathleen Lonsdale used x-rays to determine that the structure of benzene is a flat hexagonal ring. [85] 1928 - Paul Niggli introduced reduced cells for simplifying structures using a technique now known as Niggli reduction. [86]
In the United Kingdom, benzole or benzol is a coal-tar product consisting mainly of benzene and toluene. It was originally used as a "motor spirit", as were petroleum spirits. Benzole was also blended with petrol and sold as a motor fuel under trade names including "National Benzole Mixture" and "Regent Benzole Mixture". [1]