Can someone help in a problem concerning worm growth in aerobic tank reactor?

In our aerobic wastewater treatment tank, there is growth of pink worms as shown in the picture. Any idea what those might be? Would it affect our reactor? How to remove and avoid this...

02 March 2017 6,875 2 View

How much sample is required to have a good comparison between a control and case group?

We are designing a comparative analysis between an infected group and a healthy group but we are unsure as to how much patients we would need to have a meaningful comparison.

10 November 2015 4,632 8 View

How can I create a file based on the output of a certain object in R program?

If I have an object which results I would like to be created as a file, how can I do it?

03 April 2015 1,427 17 View

How can one dissolve lyophilized human plasma?

It is my first time handling plasma samples. For a standard, we need to use a human plasma that have been lyophilized. What is the proper dissolution for it and what is the solvent? How much of...

09 October 2014 3,240 2 View

How do you troubleshoot failed transformation of plasmid to host competent cells?

We received a plasmid delivered by mail and performed transformation experiment following protocol. the plasmid is used is topo with 3.9kbp. we used AK plates for blue/white screening due to the...

08 September 2014 1,711 7 View

Does anyone have any knowledge on TE Buffer vs Phosphate Buffer in DNA dilution?

Would it make any trouble if I we use phosphate buffer instead of TE buffer in diluting Nucleic acids? If I am correct, phosphate buffer is used typically to maintain the viability of live cells....

07 August 2014 6,923 9 View

Is it really suitable to autoclave glucose solution?

I was preparing a phosphate buffer and tried to add glucose. This was to prepare a buffer with an energy source for a bacterial study. After autoclaving, there was a distinct change in color...

06 July 2014 1,473 12 View

What is a good energy source for fungi to sustain life without promoting growth?

We are planning to resuspend a fungal culture with phosphate buffer and add an energy source to sustain life while removing other compounds in a medium that might interfere with the possible...

06 July 2014 1,060 7 View

What is the difference of TBE and TAE as buffers in electrophoresis?

I read that typically, TBE is used for DNA while TAE is for RNA electrophoresis but I saw some literatures using TBE in RNA electrophoresis.

05 June 2014 8,288 11 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

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View