Kierkegaard

Sellstrom, U., Jansson, B., and Kierkegaard, C. et al. (1993). Polybrominated diphenyl ethers (PBDE) in biological samples from the Swedish environment. Chemosphere 26, 1703-1718. 

Sellstrdm U, A Kierkegaard, C de Witt, B Jansson (1998) Polybrominated diphenyl ethers and hexabromo-cyclododecane in sediment and fish from a Swedish river. Environ Toxicol Chem 17 1065-1072. 

The authors are very much indebted to Dr. I. Csoregh (University of Stockholm, Arrhenius Laboratory) for intensive and fruitful cooperation over many years and to Prof. P. Kierkegaard (Stockholm), and Prof. A. Kalman (Budapest) for their continous interest in and support of this research. The authors would also like to thank Dipl. Chem. M. Hecker and Dipl. Chem. W. Seichter for drawing the figures, and Mrs. M. Weber for the trouble with the typing of the manuscript. The work at Bonn was financially supported by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie. 

The cyclic siloxanes have also been found in water from wastewater treatment plants in concentrations up to 710 pg/L in the influent and 13 pg/L in the effluent [283]. In fish, cyclic siloxane levels are usually in the low ng/g range but can go up to several hundreds of ng/g. Kierkegaard et al. [284] found a top D5 concentration of 300 ng/g wet weight in flounder from the Humber estuary in England. 

Most compounds with such high BCF and Log Ko values are highly bioaccumulative. The cychc siloxanes, however, also have a high rate of clearance from the body through exhaled breath and a fast metabolism, so they might not be as bioaccumulative as the BCF and Log ATqw values indicate [285, 294, 295]. Kierkegaard et al. [284] compared the bioaccumulation potential of D4, D5, and D6 with the one of PCB 180, a compound known to be very bioaccumulative. D5 was found to be more bioaccumulative than PCB 180 and D4 even more so. D6, however, was found to have a lower bioaccumulation potential than PCB 180. 

Kierkegaard A, van Egmond R, McLachlan MS (2011) Cyclic volatile methylsiloxane bioaccumulation in Flounder and Ragworm in the Humber Estuary. Environ Sci Technol 45 5936-5942... 

A.G. Nord and P. Kierkegaard, "Statistics of Divalent-Metal Coordination Environments in Inorganic Oxide and Oxosalt Crystal Structures.", Chemica Scripta, 24 151-8 (1984). 

TL4667 P. Kierkegaard, O. Rbnnquist, and P.-E. Werner, Tetrahedron Lett.,... 

Kierkegaard probably summed it up, best. "Life is not a problem to be solved, it is a mystery to be lived." That s chemistry, friends that s life ... 

Kierkegaard A, Balk L, Tiamlund U, et al. 1999. Dietary uptake and biological effects on... 

Sellstrom U, Kierkegaard M, Alsberg T. et al. 1999. Brominated flame retardants in sediments from European estuaries, the Baltic Sea and in sewage sludge. Organohalogen Compounds 40 383-386. 

Sjodin A, Jakobsson E, Kierkegaard A, et al. 1998. Gas chromatographic identification and quantification of polybrominated diphenyl ethers in a commercial product, Bromkal 70-5DE. J Chromatogr A 822(l) 83-89. 

Man s history has been characterized by a seemingly insoluble ambivalence toward altered states and intense experience. Freud said that in schizophrenia things become conscious that should remain unconscious. As Kierkegaard pointed out, however, "One cannot transcend one s self objectively. The existential realization of a unity of finite and infinite which transcends existence comes only in the moment of passion." Tolstoy had a similar view "It is possible to live only as long as life intoxicates us as soon as we sober again we see that it is all a delusion, and a stupid one " Despite their emphasis on intensity, both men conceded that "It is perfectly true that only terror to the point of despair develops a man to his utmost—though of course many succumb during... 

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