Hassan Ahmed

10 Questions 1 Answers 0 Followers

Questions related from Hassan Ahmed

I have observed that in one of my published paper, there is typo error. What can be done in this scenario?

Hi, I have observed that in one of my published papers, there is a typo error. Instead of stating Figure 3 (b) and Figure 3 (c). The caption states Figure 3 d. Can please someone assist me, how...

08 December 2021 4,374 3 View

In one confocal setup biosamples are not showing fluorescence at 458 nm laser but in the other confocal set up they are showing fluorescence at 458?

I am analyzing few biological samples and observe that in one confocal system they are showing intrinsic fluorescence at 458 nm excitation while in another set up they are not showing fluorescence...

11 July 2021 734 2 View

Is it possible to get different emission spectra of PAHs using different solvents?

I have used cyclohexane and then acetone evaporation of solvent results in formation of film of PAHs. However, I have seen different emission spectra for one of my sample. What is the reason...

17 July 2020 3,467 0 View

I have few images, I need same colorbar for each of them in ImageJ. However it appear very different i each image?

Is there any way to introduce same color bar in each image using ImageJ?

29 May 2020 5,827 0 View

I have observed red shift in organic compounds when they are in dif media then air? Is there any reason or if any literature please share with me?

Hi All, I was looking at emission spectra of some organic compounds and I have observed that when they are in water or in any other media then air they show red shift in their emission spectra?...

28 March 2020 8,498 3 View

I have fluorescence confocal images of nanoparticles? Can I measure the concentration of these nanoparticles using ImageJ? Is that possible?

I have ZnO and MgO nanoparticles? I want to know that can I measure their concentration using ImageJ? I have their confocal images. I have seen papers on cell counting and DNA concentration...

21 March 2020 9,626 3 View

Why fluorescence lifetime changes with different wavelength of excitation?

I have observed that in one of my sample, the fluorescence lifetime was 0.6ns when excited with 400nm laser but it change to 0.3ns at 532 nm excitation? Why?

18 January 2020 5,795 4 View

Polyaromatic hydrocarbons (PAHs) shows absorption in the region of 200 to 300 nm but what if we get emission spectra in visible region?

Polyaromatic hydrocarbons usually show emission spectra in UV range when excited with less then 300 nm range. But what if they show emission spectra in visible range after excitation with green...

30 December 2019 3,547 5 View

Anyone know how to use origin pro for confocal text file image processing?

I want to draw confocal image on origin pro from text file on origin pro? Can anyone guide me?

22 September 2018 3,184 2 View

I have to plot a spectra and I have two data sets, one has max value of 690 and min 600, other has min value of 608 and max 1500?How to normalize?

I want to plot a spectra but I don't know how can I normalize that? I am using origin pro?

14 September 2018 4,912 2 View