The heavy metal Cd seriously affects the growth and development of humans, animals plants, at same time, it has characteristics wide sources easy delivery. In this paper, effects contaminated soil remediation by biodegradable organic phosphonic acids HEDP, BHMTPMPA, HDTMPA ATMP on germination plants were studied. results showed that when concentration acid was 4%, Zinnia elegans Jacq. are best ...

A compact neutron spectrometer, based on a CH foil for the production of recoil protons and CR-39 detection, is being developed for the measurements of the DD-neutron spectrum at the NIF, OMEGA, and Z facilities. As a CR-39 detector will be used in the spectrometer, the principal sources of background are neutron-induced tracks and intrinsic tracks (defects in the CR-39). To reject the backgrou...