Bayer A.G., Leverkusen

Iyar Ugi, WissenschafUiches Hauptlaboratorium der Farbenfahriken Bayer, A.G., Leverkusen, Germany (373)... 

Laboratory notebook entry of Felix Hoffmann, describing his first preparation of aspirin. The initials CD on the page are those of Carl Duisberg. (Courtesy of Bayer A.G., Leverkusen, Germany)... 

Fiege, H. Bayer, A. G. Leverkusen. Federal Republic of Germany, in " Ullmann s Encyclopedia of Industrial Chemistry , 1991, A19, 313-369. 

Pat. 3 980 619 Mitsubishi Chemical Industries, Japan, 1974 US Pat. 4 028 333 Velsicol Chemical Corporation, USA, 1975 JA-56-115 353, C 08L 77/00. Ube Industries Ltd., Yamaguchi, Japan, 1980 Europ. Pat. 60 432 Bayer A. G., Leverkusen, FRG, 1982 8US Pat. 3 950 306 Dow Chemical Co., USA, 1974 Colloidal Antimony Oxide. Product sheet of Nyacol Products Inc. Arrived in 1985 Harshaw Antimony Oxide. Product sheet of Harshaw/Amspec Chemical Corporation. Arrived in 1983... 

Polycarbonate from bisphenol-A served as the EP. It was obtained from the Bayer A.G., Leverkusen, Germany. The number-average molar mass was determined by vapor pressure osmosis = 18700gmol . The mass average was estimated by... 

H. Stegemeyer Inst. phys. Chem./T chn. Univ. Berlin M. Pestemer Farbenfabriken Bayer A.G., Leverkusen K. Dimroth, H. Hafnen Inst. org. Chem., Marburg Univ. 

In the body, metrifonate converts to the active metaboUte dichlorvos, (2,2-dichlorovinyl dimethyl phosphate), which is responsible for the inhibition of the enzyme acetylcholinesterase in the susceptible worm. This effect alone is unlikely to explain the antischistosomal properties of metrifonate (19). Clinically, metrifonate is effective only against infection caused by S. haematobium. Metrifonate is administered in three doses at 2-wk intervals (17). The dmg is well tolerated. Side effects such as mild vertigo, nausea, and cramps are dose-related. This product is not available in the United States. The only manufacturer of metrifonate is Bayer A.G. of Leverkusen, Germany. 

Professor Heinrich Hoerlein is supervisory board member of Farbenfabriken Bayer A.G., at Leverkusen - one of the huge companies which together, on paper, are "successor companies of I.G. Farben."... 

Note that all common and scientific names of weeds in this book use as a primary source the Composite List of Weeds - Revised 1989 by WSSA, 309 W. Clark Street, Champaign, Illinois (now P.O. Box 7050, Lawrence, Kansas, USA 66044). For all weeds not found in this source, the publication by Bayer A.G., Important Crops of the World and Their Weeds 1992 Second Edition, published by Business Group Crop Protection, Leverkusen, Federal Republic of Germany was used. For the few weed species not found in either of these sources, Richard Jensen at Brigham Young University Library, Provo, Utah, and the Internet were referenced. 

At the ripe old age of 31, Otto Bayer, who just happened to have the same surname as the famous German company that he worked for, Farbenfabriken Bayer A.G., became the head of their Central Scientific Laboratory in Leverkusen. This was in 1934 and Otto Bayer s initial focus was on dyestuff chemistry, a field in which German chemists excelled. But he realized that the future of the company required diversification into new areas of industrial chemistry. Crop protection and the emerging field of macromolecu-lar science appeared to offer considerable potential. 

W. Striiver and R. Wagner, Polymer-based Catalysts and New Catalyst Resins and their Application, Bayer A.G., D-5090, Leverkusen. 

M. Kressner, J. Kolbe, F. Bremer, G. Pape, K. Wolf, and F. Kummeler, Colorant preparations, a process for their production and their use for coloring plastics, US Patent 4332587, assigned to Bayer Aktienge-sellschaft (Leverkusen, DE), June 1,1982. 

I would like to express my gratitude to the Archives of Bayer AG, Leverkusen, Germany for historical information, to G. Levy, School of Pharmacy, S.U.N.Y., Buffalo for a critical review of the section on pharmacokinetics, to A. I. Cohen, M. Porubcan and B. Toeplitz for providing spectral information and interpretations, and to M. Bruno for her expert secretarial assistance. 

In this pi-space, measurements were evaluated which were performed in a bench-scale flotation cell (Fig. 3 a) of D = 0.6 m. The flotation cell input consisted of biologically purified waste water, containing = 3 g TS/1 activated sludge (TS - total solids), which was processed in the 30 m high bubble columns, the so-called Tower Biology of BAYER AG/Leverkusen, Germany. 

Dejana E, Callioni A, Quintana A, DeGaetano G (1979) Bleeding time in laboratory animals. II - a comparison of different assay conditions in rats. Thromb Res 15 191-197 Dottl K, Ripke O (1936) Blutgerinnung und Blutungszeit. In Medizin und Chemie. Bayer, Leverkusen (Germany), pp 267-273... 

The copolymer was a gift of Bayer AG, Leverkusen, Germany it contains 0.75 mmol of hydroxy groups per g of polymer. 

Hahn followed Haber to work on gas warfare. So did the physicist James Franck, head of the physics department at Haber s institute, who, like Haber and Hahn, would later win the Nobel Prize. So did a crowd of industrial chemists employed by I.G. Farben, a cartel of eight chemical companies assembled in wartime by the energetic Carl Duisberg of Bayer. The plant at Leverkusen with the new lecture hall turned up hundreds of known toxic substances, many of them dye precursors and intermediates, and sent them off to the Kaiser Wilhelm Institute for Physical Chemistry and Electrochemistry for study. Berlin acquired depots for gas storage and a school where Hahn instructed in gas defense. 

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