22 Questions 10 Answers 0 Followers
Questions related from Taher Rabizadeh
Hi every body, I added an inhibitor to the 1 M HCl solution and assessed the corrosion behavior of mild steel by electrochemical impedance spectroscopy. Would you please tell me which EIS...
05 May 2018 8,487 5 View
Dear researchers,I would appreciate if you could guide me:I have filtered some river water samples to characterize the trapped particles on the filters by EDS. The EDS analysis shows Ca, Mg, K etc...
08 August 2017 4,132 5 View
Dear Researchers, I added 10ppm "nitrilotris methylene phosphonic acid" (NTMP) to water and I want to measure the P concentration during the time. Would you please guide me to measure the P...
03 March 2015 7,918 2 View
Hi all, I would appreciate if you could guide me.My solution contains 2500ppm calcium, 5000ppm sulphate, 8000ppm sodium, 8000ppm chloride and I add 10ppm NTMP (nitrilotri(methylenephosphonic)...
03 March 2015 4,147 5 View
Hi researchers, I want to do sulfide experiments that are sensitive to the oxygen. I want to run the UV-VIS experiments which monitors the sulfide formation (in the absence of oxygen). I can not...
12 December 2014 2,747 17 View
Would you please tell me if there is any free software to model the particles aggregation and flow? I mean spherical or cylindrical particles flow in a channel or fracture and deposit or aggregate...
10 October 2014 418 8 View
Dear researchers, Would you please tell me: at which pH polyepoxysuccinic acid and polyaspartic acid fully dissociate in water? I mean what are their pk values? Thanks.
08 August 2014 5,374 3 View
Dear Researchers, Would you please tell me how much the oxygen atom distances of carboxylic groups of citric, maleic and tartaric acid are? Is there any free software to see this distance in...
08 August 2014 5,656 3 View
Dear Researchers, I want to study the behaviour of solutions with different viscosity in a beaker as a function of stirring rpm rate. According to the image I uploaded how can I enter the stirring...
07 July 2014 890 3 View
Dear Researchers, I want to start working with COMSOL and at first step I want to model the mixture of water in a cylindrical tank to see its behavior as a function of different water level,...
07 July 2014 9,510 1 View
Dear Researchers, I am at the first stage of learning CFD for my project. But there are various kinds of software.Would you please guide me what the differences are? 1- What are differences...
07 July 2014 4,688 1 View
Dear researcher, I want to model the interaction of additive with crystal faces. Is there any software or way to do it? For example to show how maleic acid bonds to the (101) face of gypsum...
07 July 2014 1,442 6 View
I have a materials engineering with a little mathematics background. I want to use CFD to simulate the fluid behaviour in pipeline or on membranes surface which cause fouling or scaling. I know...
06 June 2014 9,015 3 View
Is there any reliable free software to draw the acid dissociate vs. pH plot? For example, in the case of citric acid at pH=7, the portion of the ions in the solution?
04 April 2014 8,989 4 View
I have XRD files which are from an XRD broker-D8 instrument and their file format is.raw . I want to analyse the peaks to find the phases and find out the (hkl) of the peaks. Is there a free...
04 April 2014 2,691 27 View
I use calcium ion selective electrode. I calibrate it with 5 standard solutions and draw the mV vs. Calcium concentrations related to the standard solution calibration graph. Then I mix 100mM...
02 February 2014 3,319 4 View
Would you please guide me about questions below via the attached file: I mixed calcium chloride and sodium sulfate and precipitated prismatic monoclinic needle shape gypsum crystals that SEM (fig...
02 February 2014 3,796 7 View
I mix two solutions of calcium chloride and sodium sulphate, I think at first nano-calcium sulphate particles precipitates which have 10-20nm. Without using cryoTEM I want to prove this, so I want...
02 February 2014 5,733 12 View
I have an XRD pattern of gypsum crystals and I want to determine if each peak is related to which face. Would you please help me? I attached the information. Would you please also guide me why...
02 February 2014 8,353 2 View
Could someone guide me on this matter?
02 February 2014 2,339 2 View
I did an XRD test for gypsum crystals which have a needle shape. One peak has much more intensity than others. I have other kinds of gypsum crystals which have been produced in other conditions...
01 January 2014 4,081 9 View
I added equal amount of malic or maleic or citric acid to the calcium sulphate precipitation solution to investigate their performance as an inhibitor. Citric acid acts better than malic acid...
01 January 2014 9,664 5 View
