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This review presents the justification of research into heavy metals and clean-up technologies with particular emphasis on phytoremediation of heavy metals contaminated soils. The generating sectors and heavy metal contaminant contributors are reviewed alongside likely types. The new paradigm by researchers in response to negative impacts of various clean-up methodologies has been discussed. Th...

Work subject to heavy progress, please do not distribute. Acknowledgements: We would like to thank François Fontaine for usefull discussions.

By expanding functions of parton fragmentation into a heavy hadron in the inverse of the heavy quark mass m Q we attempt to factorize them into perturbative-and nonperturba-tive parts. In our approach the nonperturbative parts can be defined as matrix elements in heavy quark effective theory, the shape of the functions is predicted by perturbative QCD. In this work we neglect effect at order of...

BACKGROUND Physical activity in leisure time seems to reduce the risk of low back pain, but it is not known whether occupational activity, as recorded in a representative working population, produces a higher or lower risk. OBJECTIVE To study associations between physical activity level at work and risk of chronic low back pain. METHODS Associations were examined in a Norwegian prospective ...