The QSAR analysis can be aPPied to the marine environment toxicity field, and be used as an effective method for the assessment and forecashng of the hazard abilities of som contaminate organic compounds for marine cultures.
Reference values are intended to indicate the upper margin of the current background exposure of the general population to a given environmental toxin at a given time.
Reference values can be used to identify subjects with an increased level of exposure (in relation to background exposure) to a given environmental toxin.
An analysis of relapse factors of 155 opioid addicts was carried out with a questionnaire provided by National Institute on Drug Dependence. The results showed that relapse rate was 86.4%. The propotion of relapse 1-2 times, 3-5 times, 6-10times, 11-20 times and over 20 times was 41.8%, 35.8%, 12.7%, 8.2% and 1.5% respectively. Among the relapse factors, the most important causes were peer influence of drug abusers, desire for“last use”, having nothing to do, boredom, returning to original milieu successive...
Research is made for the chemical consititution, mineral composition and microstructure of the mixture composed by alkali slage and other material (here in after referred as alkali slag soil) by such testing procedures as electron microscopic scanning, X ray diffraction and energy spectrum test, etc.. Analysis is made on samples taken to detect whether the toxic side effect polluting the environment is produced or not when the alkali slage is used as engineering soil or backfilled soil. The geotechnic...
Aluminum (Al) is thought as a neurotoxic agent recently, which induces abnormality of neurobehavior and cognition in animals and human beings. The neurotoxicity of lead was known from ancient time, which causes intelligence, neurobehavioral and cognitive defect. The effects of chronic 0.2% AlCl3 exposure on synaptic plasticity of LTP and DP of LTP and the difference of the impairment of synaptic plasticity between Al-exposed and Al and Lead (Pb) exposure (0.3% PbAc) in postlactational rat dentate gyrus (DG)...