How does the addition of impurities enhance Radiative recombination in indirect band gap semiconductors?

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How to directly convert anthracite into Graphene in a simple way?

I read an article (https://doi.org/10.1016/j.synthmet.2020.116364) regarding the direct conversion of anthracite into graphene in the presence of molten. I would like to ask the view from...

05 May 2024 969 0 View

How should aqueous epinephrine aliquots be stored?

I am planning a series of longitudinal drug studies using epinephrine. I'd like to aliquot a stock solution of aqueous epinephrine and store at -20'C to use for these experiments. I've struggled...

29 April 2024 1,034 3 View

What is the best formula to calculate matrix effect?

I am developing a SPE method as part of the sample preparation step in my analysis, but I’m not sure what is the best way to determine/calculate the matrix effect. I see a few different formulas...

24 March 2024 1,253 5 View

Which statistical test should be used? McNemar vs Chi-square?

I am in a small disagreement with my statistician and would appreciate some additional perspective. This statistical question is regarding a cohort of participants with cancer. I am interested in...

03 January 2024 8,795 1 View

What is the purpose of Sephadex G-100 separation after PEG precipitation for exosomes/EVs in a publication?

Hello! I am reviewing a procedure for exosome/EV purification from a large-volume blood sample (porcine, terminal draw). In brief, protocol is: 1) Blood collection 2) Two-step spin to get...

26 October 2023 6,809 1 View

How can i model customer segmentation using supervised learning model ?

I need to write a thesis to model customer segmentation,but I don't know how to go about it

13 October 2023 4,400 3 View

Discuss the impact of globalization on kenya's foreign policy?

kenya foreign policy context

06 October 2023 2,477 2 View

Discuss the politics involved in the adoption of environmental policies. what factors influence the decision to adopt or reject environmental policy?

what factors influence the decision to adopt or reject environmental policies at te national level?

04 October 2023 5,560 3 View

Is it acceptable to ask for survey participants in this forum?

I would like to know if soliciting for survey respondents acceptable on this platform.

07 September 2023 5,904 2 View

What is a good Ct value for real time PCR?

Hi, so I was just wondering what would be a good Ct value to aim for in real time PCR. My lab typically uses about 150ng of cDNA per well for a 10uL real time qPCR reaction. But in a recent time...

15 July 2023 9,529 4 View

Geotechnical Engineering (Proceedings of the ICE) time review?

Hello everyone, I recently submitted an article to Geotechnical Engineering (Proceedings of the ICE), and the current status has been listed as "EiC Pre-assessment: Ready" for the past 20 days. I...

10 August 2024 6,493 1 View

1. If I can quantize the atom using this hyperbolic spiral and classical physics, could nature do the same?

If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...

07 August 2024 5,343 2 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

¿Are oxygen vacancies in semiconductors capable to change the band gap?

Dear all! Oxygen vacancies do raise negatively the Fermi level by increasing the negative charge in the semiconductor crystal structure. In the case of n-type semiconductors, I wonder if this...

30 July 2024 8,339 2 View

How to build my own lab made four point probe set up?

Hello, I'm trying to measure the conductivity of semiconductor films but since I don't have a commercial four point probe set up I would like to build one on my own in my lab. I have generators,...

30 July 2024 906 2 View

What should a Mechanical Engineering PhD scholar focus on during their PhD to enhance their chances of securing a postdoctoral position?

29 July 2024 7,714 4 View

May I know the exact Quartile of the journal- Advanced Engineering Materials (Wiley) for material science category?

In some data sources it has been grouped in Q1 and some shows it is Q2.

29 July 2024 4,227 2 View

Ternary in Electrical Engineering?

Dear Research Community I would like to invite Elctrical Engineering specialists to solve problems related to Ternary Algebra or tripple sets I have an algorithm that places in relation three...

28 July 2024 5,771 2 View

What topic or subject does Production Engineering need to address more?

Contemporary scores or innovations in scientific approaches. Hybrid methodologies, emerging themes and cross-cutting issues?

27 July 2024 648 3 View

Reason for discontinuities in my Band structure?

Hey All! I am wondering what might be wrong with my band structure. I did the calculations using VASP and plotted the results using Origin. Although I have tried changing various input...

25 July 2024 2,920 11 View