Carcinogenic Risks to Humans, Overall Evaluations of Carcinogenicity: An Updating of iarc Monographs Archived at the Wayback Machine., Volumes 1 to 42, Supplement 7 Huff J (2007). Loschmidt, Chemische Studien (Vienna, Austria-Hungary: Carl Gerold's Sohn, 1861. Benzene causes cancer in animals including humans. "August Kekul and the Birth of the Structural Theory of Organic Chemistry in 1858". Gratis Nieuwsbrief, geschiedenis Nederland, leven in de delta is een reis door de tijd en door Nederland. "The electronic structure of the benzene molecule". The benzene molecule is composed of six carbon atoms joined in a ring with one hydrogen atom attached to each. Anderen verstopten hun vierwieler bijvoorbeeld in een hooiberg. Hydroquinone, benzenetriol and catechol are converted to polyphenols. 100, Kekul suggests that the carbon atoms of benzene could form a "chane ferme" (a closed chain, a loop).
53 Toluene is now often used as a substitute for benzene, for instance as a fuel additive. However, in the 1950s, increased demand for benzene, especially from the growing polymers industry, necessitated the production of benzene from petroleum. Replacement of a second CH bond with N gives, depending on the location of the second N, pyridazine, pyrimidine, and pyrazine. Arnold,.; Plank,.; Erickson,.; Pike,. "Electronic structure of the benzene molecule". 169: "On distingue facilement ces trois sries, dans lesquelles les drivs bihydroxyliques ont leurs terms correspondants, par les prfixes ortho-, para- et mta-." (One easily distinguishes these three series in which the dihydroxy derivatives have their corresponding terms by the prefixes ortho-, para- and meta-.).
Substantial quantities of epidemiologic, clinical, and laboratory data link benzene to aplastic anemia, acute leukemia, bone marrow abnormalities and cardiovascular disease. 20 21 Gradually, the sense developed among chemists that a number of substances were chemically related to benzene, comprising a diverse chemical family. In 1903, Ludwig Roselius popularized the use of benzene to decaffeinate coffee. Thus, a double bond would exist with one neighbor during the first interval and the other neighbor during the next interval. 41 It was the German chemist Karl Gräbe who, in 1869, first used the prefixes ortho-, meta-, para- to denote specific relative locations of the substituents on a di-substituted aromatic ring (viz, naphthalene). Welch, Vincent.; Fallon, Kevin. Zo kwamen bij Ford al in 1940 de eerste Pratt Whitney vliegtuigmotoren van de lopende band. Approximately 24,700,000 tons were produced in 1999. Steam cracking edit Steam cracking is the process for producing ethylene and other alkenes from aliphatic hydrocarbons. Door op Cookies accepteren te klikken, ga je hiermee akkoord.