What should be the permissible limit of TDS in drinking water?

While using purifying system with RO for collecting drinking water, the water in many cases shows very low conductivity even less than 30 microS/cm. So TDS is much less. Whether such water is...

14 May 2016 7,417 20 View

Are cloned plasmids less efficient in transfection?

Are pDNA that are cloned with the genes of interest less efficient? are there any drawbacks? Any drawbacks in relation with lipofectamine or using them with HeLa or HEK 293?

24 March 2016 9,847 5 View

Anyone knows any papers where different bacteria were tested against antibiotics by disk diffusion method?

Bacteria tested against antibiotics

23 March 2015 2,079 3 View

Can anyone please tell me two old and current techniques used to diagnose scarlet fever or group A streptococcus in labs?

Scarlet method diagnostic methods

27 February 2015 8,601 5 View

Can you suggest suitable pH electrode for high temperature application?

Generally glass pH electrode is considered as most suitable electrode for accurate determination of pH. But it cannot be used when solution temperature exceeds 80 deg.C. I am looking for a...

01 December 2013 8,630 23 View

How can you determine pH of high purity water?

Most of the glass electrodes recommended for pH measurement do not work well while measuring pH of high purity water. They work well in buffer solutions and other aqueous solutions not for high...

31 October 2013 5,342 21 View

How can you design a pH electrode which will avoid acid and alkali errors? Can you suggest which brand pH electrodes are free from such errors?

Using ordinary pH glass electrodes, one encounters problems in pH measurement when the solution pH is about 1 or above 12. In such cases, acid and alkali errors come on the way. A few electrodes...

22 May 2013 4,851 3 View

Why does the cell constant of a particular conductance cell vary with a change in KCl concentration.

If one measures cell constant using 0.01N KCl and 0.001N KCl the values differ. When cell constant is fully governed by the geometry of the electrode, why does such a difference arise?

15 May 2013 7,414 9 View

How can you determine the pH of high purity water?

In the case of very low ionic strength solution such a problem arises. Some specific brand of Metrohm is generally used. I want to know if any other brand will meet the purpose?

27 April 2013 4,622 5 View

How can you determine NaOH and Na2O in presence of each other where the quantity of each is restricted to a few miligram level (2 to 20 mg )?

I find difficulty to analyse each chemical species in the aerosol samples collected during a controlled sodium fire. Though I have developed technique for quantitaive determination of NaOH, Na2CO3...

26 April 2013 1,260 3 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Which is suitable for use with Python? MySQL or SQL Server?

Which is suitable for use with Python? MySQL or SQL Server? What is your suggestion?

01 March 2021 3,422 3 View