Private Berger

It is also possible that the termination of the long chain polymers may be caused by some impurities present in the system since it has been frequently observed (private communication of Dr. A. Berger) that purification of the monomer and solvent leads to faster polymerisation. 

Permethrin 85.2 ng m" Private homes with woolen Berger-Preiss et al. 

Similar results were reported by Berger-Preiss et al. [33], who analyzed permethrin in the indoor air of 80 private homes in Hannover (Germany). A maximum of 15.2 ng m was observed, but the concentration of permethrin in air was highly dependent on the concentration of suspended particles. Berger-Preiss et al. [33] concluded that the permethrin concentration in air was mainly influenced by the degree of carpet fiber abrasion, as their investigations were performed in rooms covered with woolen carpets impregnated with permethrin. 

D. E. Berger, M. Healy (Claremont Graduate University, Claremont, CA), private communications http //wise. cgu.edu/sdt/sdt.html computes and displays ROC curves on line [8]. 

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