Where is it possible to buy a polarizer device for a FT Raman spectrophotometer equipped wit Nd:Yag lazer source?

More Sayyed Faramarz Tayyari's questions See All

Could anybody tell me how we can calculate the relaxation energies by using a Gaussian program?

For calculation of intraction energies it seems it is necessary to consider the relaxation enrgies.

06 July 2014 4,940 1 View

Does anybody knows about the role of K ion in resisting of plants against dryness?

K ion increases the resistance of plants in dry weathers.

04 May 2014 1,627 3 View

What is "Error in CO-Value" when starting to run the AIM2000 program?

By running the aim2000 program for a complex molecule I encountered with the "error in CO-value" how can I overcome to this problem

01 January 1970 8,439 4 View

Is proton tunneling a sudden process or non-sudden

I mean proton tunneling suddenly happens or gradually pass over a saddele point without using enough energy?

01 January 1970 6,076 6 View

Who knows it it is possible to use higher memory for Gaussian o9 in windows

I have a computer with 12 GB ram while I can use onle1.5 GB memory. How it is possible to use more memory for runnige Gaussian 09

01 January 1970 7,623 3 View

Absorption coefficient of methane?

Hello, Can anyone provide me with the absorption coefficient of methane gas at 7.7 um? Any reference?

06 August 2024 980 5 View

How can I add own Henry coefficients in Aspen Plus?

Hi, i would like to simulate an absorption process in Aspen Plus. I want to use the NRTL model und would like to add some individual Henry coefficients. Is that possible and how?

05 August 2024 2,333 2 View

Why might the impedance values for DI water and 0.1X PBS buffer solution exhibit a decreasing and increasing trend, respectively over time (HP 4194A)?

Hello everyone, I'm encountering an issue with my electrochemical impedance spectroscopy (EIS) measurements and would appreciate some insights. Experimental Setup: Electrodes: Gold interdigitated...

05 August 2024 3,783 2 View

Why is TLC not a form of partition chromatography?

Why is TLC not a form of partition chromatography and paper chromatography not a form of absorption chromatography?

03 August 2024 7,035 3 View

Mossbauer spectroscopy Co0.6Mn0.4Fe2O4 MNPs?

Following curve related to Co0.6Mn0.4Fe2O4 Magnetic nanoparticles with extra phase a-Fe2O3. I will appreciate to help me to interpretation this spectroscopy, especially the blue line.

31 July 2024 9,140 2 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

Why do some of my Raman spectra show no signal at lower Raman shifts?

I'm using a InVia Renishaw Raman microscope system (785nm wavelength, 600l/mm grating density) to acquire Raman images on human brain samples, at 50um resolution. The samples are placed on MgF2...

30 July 2024 8,771 3 View

How to calculate conductivity using Electrochemical Impedance Spectroscopy's Nyquist plot?

Hello everyone, I am new to this characterization but watching videos on youtube I have already plotted a Nyquist plot (Z' and -Z'') and already fitted models on my material using Zsim. But now I...

29 July 2024 1,376 0 View

How to make the concentration measurements for the hydrogen absorption/desorption in the metal hydride?

Hello Everyone! I am trying to create a metal hydride system where I am trying to create a temperature control with the emphasis on measuring the concentration of the hydrogen with the hydrogen...

29 July 2024 7,577 2 View

I have synthesized a composite of ZnO and In2O3 with variations in ZnO content. In Raman , what is the peak observed at 130 cm-1?

Dear all, I have noticed, as the ZnO content increases, the Raman intensity at 100cm-1 also increases. However, there is a peak nearby at 130 cm-1, which I could not find in any paper related to...

28 July 2024 5,410 1 View

Rolando Rafael Lozada García

I have not Idea!

Mukkera Rajesh

http://bwtek.com/technology/raman-systems/?gclid=CjwKEAiAuea1BRCbn-2n7PbLgEMSJAABQvTTOFWLmzjX4qRNUcR9dF102m0rdY4EHgwN4t9tnS8NMRoC6STw_wcB

Try this

Ian Butler

TRy contacting Bruker or Renishaw.

Eric Van Steen

It depends on the Raman spectrometer you have. Look at http://www.perkinelmer.com/CMSResources/Images/46-74723PRD_RamanPolarizationAccessory.pdf

Bojidarka B. Ivanova

Mr. Tayyari,

From PerkinElmer (http://www.perkinelmer.com/)