How to clean up TEM grid with plasma cleaner?

I need to clean the hydrocarbon contamination on the carbon substrate of TEM grid. However, I heard that substrate could be broken by the powerful plasma. My substrate is pure carbon, with ~3nm,...

23 February 2021 3,262 5 View

Can anyone advise me on how to amplify V4 region of fecal DNA of dss-induced colitic mice for microbiota profiling?

Animals were fed DSS via drinking water and fecal samples were collected and DNA was isolated using Qiagen stool DNA isolation kit. The V4 region of extracted DNA was amplified with specific...

20 December 2020 1,739 3 View

Colour of Methylammonium Iodide (MAI) in Isopropanol (IPA, 99.7%) turned slightly green after storing some time?

Has anyone observed the changes of colour of MAI in IPA to slightly green-ish after storing some time? I might have to prepare fresh solution again if this is abnormal. Could anyone verified the...

18 April 2020 7,504 1 View

How to connect Newport's Keithley SMU to perovskite solar cell to measure efficiency?

I have 4 crocodile clip wires, if I'm not mistaken 2 wires (red) connect to anode and the other 2 black wires connect to cathode. Both pairs of wires are plugged at the back of the SMU. Problem...

16 January 2020 3,000 2 View

What is high impact factor journal?

My paper was rejected due to some rules set by the so-called "High impact factor journal". I couldn't find the definition for this term.

08 January 2020 8,372 16 View

Can I use Phillips Halogen Lamp (70W) to access the light stability of perovskite solar cell under ambient air condition?

We only have 1 Newport Xenon Lamp for PCE measurement. Is halogen lamp a suitable substitute for the Newport Lamp? We don't have the money to purchase another one solely for stability testing. If...

07 November 2019 5,294 6 View

Weighting Methylammonium Iodide in ambient air with 40-60% humidity for perovskite precursor preparation?

Hi, i would like to know will the humidity (40-60%) of the room be detrimental to the MAI powder when weighting on the analytical balance? is the moisture sensitivity reduced when MAI is quickly...

25 June 2019 5,689 4 View

Determining the amount of HAuCl4.3H2O sticking on glass vial inner surface?

Since HAuCl4.3H2O (gold precusor) is very expensive, it is best to utilized it as much as possible. I have a glass vial that contains such gold precursor. Some of it are spread onto the inner...

28 May 2019 9,890 3 View

How to oxidize titanium layer sputtered on FTO glass to anatase to act as blocking layer?

I have sputtered a layer of Ti on FTO and was hoping to perform anodization on the sample to obtain TiO2 nanotube. However, when semi-transparency is achieved, the TiO2 nanotube peeled along with...

16 March 2019 3,684 4 View

Any suggestions antigen retrieval methods in immunohistochemistry with bone and cartilage samples?

I am doing IHC with bone and cartilage samples (eg. growth plate). For antigen retrieval, I usually heat the samples in Citrate buffer (pH 6.0) using pressure cooker (for 1 min at max. temp and...

25 February 2018 4,776 8 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

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 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

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 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