Review and cite PEAKS protocol, troubleshooting and other methodology information | Contact experts in PEAKS to get answers
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Questions related to PEAKS
There are many ways to calculate crystallite size and lattice strain of a sample, based on XRD peaks: "Scherrer" calculation, "Williamson-Hall" or "Rietveld". Each method or calculation is used...
31 March 2021 3,093 7 View
What are the steps for preparing a water extract from the leaves of some plants and diluting them to 1: 1, 1:10, and 1: 100?
30 March 2021 9,924 6 View
hi evrybody, I am using the internal standard technique for building a calibration curve for PHB((Polyhydroxybutyrate).My internal standard is benzoic acid.Before GC, I used 2ml 2 mg /mL PHB（in...
28 March 2021 9,179 2 View
I have tested a 3D-printed sample, in two directions. The results showed the intensity differences in the peaks. But after I normalized the data, the peaks looked very similar. So in the research...
26 March 2021 2,790 7 View
TMS is shifted for 0,5 ppm towards metabolite peaks which match peaks in literature.
25 March 2021 9,793 10 View
Dear Researgate Community, I hope you are all doing good. I am using caffeine as an additive in my experiment. I have run FTIR spectroscopy to analyze the purity of the sample. FTIR spectra showed...
20 March 2021 9,451 7 View
I have 20% (w/w) formaldehyde-d2 in water. I want to calculate the isotopic purity using NMR. But I am getting 3 to 4 peaks corresponding to different polymers of methylene glycol. How to find the...
18 March 2021 4,687 2 View
I want to be able to create a macro on topspin that can find a peak in the spectrum and calculate its integration evenly according to specific Hz. For example, I have a spectrum with peaks at 10,...
16 March 2021 2,011 1 View
Hi all, is there a way to analyze cell proliferation with CFSE with BD DIVA software? I activate murine splenocytes or purified CD4 and I use Cell Trace and follow the exact protocol but I only...
16 March 2021 8,522 1 View
Dear Researchers We attempted to degrade methylene blue (MB) with negatively charged nanoparticle (NP). Both NP and MB were in aqueous solution and they were mixed. Immediately after mixing or...
15 March 2021 8,838 10 View
I am mixing moo3 with carbon material and kept it under autoclave for hydrothermal 180 c 6 hours, observed the formation of a green solvent after taking the hydrothermal reaction. I added 0.25...
13 March 2021 270 0 View
Hi everyone, I've been working on the detectability of alpha-defensin in urine for some months now and there is one thing i cant quite wrap my head around. The variety in brightness of the peaks...
09 March 2021 7,105 1 View
The Raman spectrum of propylene was obtained by experiment, but the measured Raman peaks were different from those described in the book "Vibrational Spectra and Structure of Polyatomic...
09 March 2021 2,524 8 View
I have attached a set of kinetic equations that I need to design a cstr with. They are in terms of mole fraction and I have been stuck on which way to go about it as aspen does not allow me to put...
09 March 2021 5,646 0 View
Does anyone know why do we have a set of additional, unassigned peaks in 2D 1H-15N HSQC spectra? I know unassigned peaks usually are side chains, but I am not 100% sure.
05 March 2021 1,238 1 View
Hi all, I am having a issue with my FTIR spectra as some of the peaks seem to be inverted (I repeated this experiment in a different day and the peaks seemed to be normal then).
05 March 2021 8,226 5 View
The figure shows DSC cooling (blue) and 2nd heating (green) curves (step: 10 K/min) for a commercial sample supplied as Atactic Polypropylene (APP). The heating curve illustrates two major...
04 March 2021 6,483 3 View
i have recorded raman spectra of strontium oxide thin film. the spectra were recorded in the range 400 to 4000 cm-1. i have reference to peaks upto 1000cm-1. but i couldn't find literature for...
27 February 2021 3,119 1 View
When I measured the cyclic voltammogram of palladium in the pbs solution, two reduction peaks appeared. This did not match the literature I saw. Why? And how can I find the possible reaction...
21 February 2021 2,898 3 View
I measure the wavelength of material in a spectrophotometer and it peaks at 275 and its absorbance is 100. I mix it with an adsorbent and it adsorbs the first material, but when I measure the...
17 February 2021 7,948 5 View
If the intensity of two peaks in the X-ray pattern is the same, which peak is used to calculate the crystalline size in the Scherer formula? and why?
27 January 2021 5,429 5 View
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...
21 January 2021 8,447 3 View
I have a xrd pattern, in that i suspect that one of the peak may be due to SL, i want to understand how to confirm it or reject it
08 January 2021 6,019 3 View
I measured the size of nanobubbles using Malvern zetasizer ZS. Due to the unreliability of the average size (polydispersity index is high > 0.5 but < 0.1 is the acceptable value), I have to...
06 January 2021 2,079 3 View