Mahdi Ghorbanian

7 Questions 22 Answers 0 Followers

Questions related from Mahdi Ghorbanian

Does any one know What the standard daily and monthly usage time of mobile devices is?

Hello every one Is there a mathematical relationship between age, sex and the weight of people with the time allowed for using mobile devices or devices which use or produce high frequency and...

20 April 2018 6,855 1 View

Would you please answer following question about stay time for gamma radiation?

A lead shielding (µ=1.19) is used to protection against a source of caesium 157 with dose rate of 0.11 R/h. emitted gamma radiation has a 0.6 Mev energy. If lead shielding thickness is 0.02 m,...

05 May 2017 8,298 4 View

Could anyone please tell me what range of ORP (redox potential) is desirable for anoxic condition (particularly denitrification)?

I find opposite and contradictory range for ORP which reported by various researchers who worked on denitrification. I need to reliable reference for ORP range in aerobic, anoxic and anaerobic...

27 August 2014 9,494 13 View

How can I determine if activated sludge reactor operates in declining or logarithmic phase?

As above.

21 May 2014 3,339 8 View

Does anyone know why SRT must be greater than HRT in activated sludge system?

As above.

21 May 2014 7,842 5 View

Does anyone know what happens if concentrated sulfuric acid is added to crude oil?

Can organic matters be oxidized by acids?

22 March 2014 9,332 5 View

How I can measure biosurfactants (type and amount) in oily wastewater?

Please introduce instrumental methods.

13 March 2014 474 4 View