How to classify strictly upper triangular matrices by similarity?

Let F be a field. Consider U, the set of n times n strictly upper triangular matrices in F. For X, Y in U, we call them similar if there exists some S, which is non-degenerate and upper...

01 March 2021 2,957 8 View

What is the difference between the supplementary cementitious materials and alkali-activated concrete?

18 February 2021 9,188 3 View

For displacement control test, what is the relation between stress intensity factor and crack length?

There are two plates with horizontal center crack, one with crack length of a with the other with a+da. The bottoms are fixed while the tops are under the same displacement load. For intuition,...

11 February 2021 9,543 2 View

Difference between Second-harmonic generation and Two-photon absorption?

Hello Dear Researchers, I am confused about the Difference between Second-harmonic generation and Two-photon absorption? Can anyone describe the two phenomena briefly in the physical picture? What...

24 January 2021 9,912 5 View

Which kind of GPC solvent can be used to dissolve both lipid and salt?

I want to find a GPC available solvent to dissolve both lipid (DPPC, 2 mM) and salt (NaCl, 100 mM).

14 January 2021 3,805 2 View

Is it possible to publish a paper contradicting Einstein's special relativity in any Journal?

I just developed a new theory on electromagnetic and plan to publish in a Journal. The findings are purely through strict mathematical derivation without any disputable assumptions and also...

13 January 2021 1,558 5 View

How is linear form of plasmid circularized?

Hi all, I'm working on transforming E. coli with plasmid in a mixture of linear and circular form. What happened to the linear form once uptake? Do cells ligate them directly? Or cell DNase...

13 January 2021 8,336 4 View

Why dose plasma AngII concentration decrease in AngII infusion mice detected by AngII ELISA kit?

I detect the plasma AngII concentration by AngII ELISA kit (ENZO), the results show that plasma AngII decrease in AngII infusion mice. I check with the kit and find that the kit could recognize...

31 December 2020 8,838 3 View

FoldX YASARA plugin keep showing error message. Please help?

Hi, I use YASARA (version 17.8.15) on windows 10 and recently I am trying to install FoldX plugin on YASARA. Here is what I did: 1. Download YASARA plugin for windows (and the executable and...

24 December 2020 536 3 View

Why does the impact force of barge pier collision suddenly increase to the peak value in finite element simulation?

I am learning the knowledge about barge pier collision these days, and have a problem that the impact force of barge pier collision suddenly increase to the peak value in ls-dyna. But the...

05 December 2020 9,978 3 View

Could we interpret the intensity of the peaks of the FTIR spectrum correlating to the concentration of some compound?

If we analyze the extract of two plants from the same species (for example) and there are very similarities between the two IR spectra except for the intensity of one peak at the same wavenumber....

05 February 2021 2,630 5 View

What does the intensity of peaks in FTIR spectrum indicates?

Is it possible to conclude that increasing the intensity of FT-IR peaks represents an increment of functional groups or interaction between functional groups? Any suggestion would be highly...

20 January 2021 7,683 3 View

How to calculate IR and RAMAN spectra form Born charge ?

I am using crystal 17 for my solid state ab initio calculations. For some reason the program is not able to produce the Raman spectra but have generated born charges. Is there any way to produce...

11 January 2021 2,317 2 View

What kind of detector is used in the double slit experiment to determine through which slit the photon or electron passes?

Explain exactly what the detector does and if the choice of detector affects the outcome. Einstein and Bohr had some discussions on this. What's the current situation?

29 December 2020 1,984 5 View

What is the correct formula to calculate NDWI ?

Gao (1996) gave the expression to calculate NDWI using Near Infrared (NIR) and Short wave Infrared (SIR), while some research suggests the use of the Green (G) band and Near Infrared (NIR) bands....

28 December 2020 9,938 2 View

Absorption coefficient of atmosphere at sea level versus wavelength?

I'm looking for some raw data for the transmission through the air in my lab, specifically in the MIR region. I've found a lot of data online that gives transmission vs wavelength, but the units...

22 December 2020 9,039 2 View

May I use Minimal important difference (MID) in non-normal distribution?

MID is based on Standard deviation, consequently, I should not use it in non-normal distribution. Am I right? If yes, which test may replace MID?

13 December 2020 7,573 3 View

Interpreting and troubleshooting anomalous HPLC results?

I am running a simple isocratic Shimadzu HPLC system coupled to a fluorescence detector to detect and quantify biogenic amines from in vivo samples. But my results are not as expected and I'm...

10 November 2020 7,027 5 View

What HPLC detector to choose to detect surfactants?

Colleagues We have a Waters e2695 HPLC instrument (with 2489 Uv-Vis detector). Recently we initiated the analysis of surfactants/lipids, which are unfortunately poorly visible to UV detector. We...

08 November 2020 4,645 18 View

Can anyone suggest a cause for a lack of fluorescent signal from a Diorex UltiMate 3000 RS detector in an HPLC experiment?

I am trying to detect viral capsids using an UltiMate HPLC system. I have a strong peak at the expected retention time using a 260/280nm UV detector, however I am not receiving any signal from the...

27 October 2020 3,786 2 View