in order to assess the risk for mercury poisoning in dentists, urine specimens were collected and analysed from 250 dentists (190 male, 60 female). subject data and pertinent health symptoms were asked via a questionnaire. the results indicate that the mean and standard deviation of mercury values were 51.3± 38.0 µg/l, while 27.2 percent of dentists had levels within normal limits (0-19 µg/l). ...

aims: the effect of electrochemical process on polyphosphate alone has not been yet investigated. the aim of this study was to study polyphosphate removal from synthetic wastewater by electrochemical process.  materials & methods: this research was carried out experimentally on 50 samples of synthetic wastewater. in each run 2000ml of sw took place in a batch. a constant 600ma direct current wa...

background; foods have been many changes from production to tables and continuous control is necessary to maintain food safety and supply foods with good quality. the aim of this study was to evaluate the quality of some foods with high consumption in zanjan city during the 5 years from 2009 to 2013. methods; in a case-control descriptive study with an annually control program during 5 years fr...

For the analysis of soil resistivity results and measurement, engineers have guidelines instructions from various international standards at their disposal. The circumstances under which mathematical expressions in these were obtained are not always clear. One such case is described this article refers to IEEE Standard 81-1983, an expression for apparent resistivity, a theoretical model predict...

The energy spectrum of neutrino-induced upward-going muons in MACRO was analysed in terms of special relativity principles violating effects, keeping standard mass-induced atmospheric neutrino oscillations as the dominant source of νμ ←→ ντ transitions. The data disfavour these exotic possibilities even at a sub-dominant level, and stringent 90% C.L. limits are placed on the Lorentz invariance ...

During the year 2000, LEP has been operated at centre-of-mass energies up to √ s = 209 GeV. New particle searches have been performed using these data samples. Model independent limits on the production cross-sections and mass limits in the context of the Minimal Su-persymmetric Standard Model (MSSM) assuming R-parity violation and in the context of gauge-mediated supersymmetry breaking theorie...