How do I remove supernatant completely from cell lysate?

I am using E.coli BL21 Plyss for a recombinant protein production. The cells debris becomes too sticky after lysis. I spin down the pellet at 13000 g (that is the maximum available here). The...

07 August 2019 3,528 7 View

Are there any standard protein-ligand titration reactions that I can use to calibrate my ITC equipment?

The acid base titration standards are working fine. I just want to know if there are any protein-ligand standards. Thanks in advance

04 May 2019 2,094 3 View

Can PCR cleanup kits be used for gel elution of restricted plasmid DNA?

I use PCR cleanup kit from Thermoscientific. The extraction of restricted plasmid from gel failed twice but the extraction of insert which was run parallely gave me DNA with good concentration and...

01 February 2019 1,982 18 View

Can a HiPrep 16/60 Sephacryl S-100 column be connected to peristaltic pumps?

Can I connect the column to a peristaltic pump operated at a low flow rate and leave the other end open to elute the contaminants out of the column? Or will it disrupt the column packing??

01 February 2019 9,756 6 View

Can I run a restriction digestion just by increasing enzyme volume and not reaction volume?

I need a huge concentration of restricted product. So can i just digest them in a 50 uL reaction with high volume of enzyme (say 5-7uL). This is just to run the digested product in a single gel...

01 February 2019 2,068 13 View

What are the points I need to take care when designing primers to amplify GOI which will be used for cloning?

The crucial points that need to be considered to avoid failures in cloning.

31 December 2018 9,980 2 View

How to unclog FPLC column?

The HiPrep 16/60 Sephacryl S-100 column that we use is clogged with some dark coloured particles at the very top. I tried cleaning up the column with 0.5M NaOH followed by distilled water. This...

31 December 2018 5,444 9 View

Is it necessary to add oligos front and back of the restriction sites?

Should I add oligos based on the chart flanking both the ends of the restriction site or adding oligos to the end of DNA is enough?

31 December 2018 2,665 6 View

Does absorbance at 230nm influence cloning?

I have purified my PCR product with PCR purification kit by thermo scientific. When analysing the sample in nanodrop after purification I get a very high absorbance at 230 nm. Will this interfere...

11 December 2018 9,371 8 View

How long can I stored restriction digested products?

How long I can store DNA that has been digested with restriction enzymes, gel purified and eluted in elution buffer? Will the overhangs be stable (since ss DNA are unstable) after freezing in -20...

11 December 2018 295 0 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

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

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

In PRIMER, is it possible to downweight certain taxa in multivariate community datasets to reflect uncertainty around identification??

I have a dataset with about 80 different species. As usual, some species are very easy to identify with certainty whereas others are more difficult, which means that I am less certain of my...

03 March 2021 8,066 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 do I increase the yield of my PCR product?

Hello, We would like to increase the yield of our PCR product. We are running a series of PCR reactions that is targeting ~1.1kb sequence. We begin each reaction with ~400pg of template DNA...

02 March 2021 4,029 3 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View