Have anyone a one table for all colorimetrical agents for UV-VIS spectroscopy?

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How to determine lead ions in water media via UV-Vis spectrophotometry?

In our practice, we determining Pb2+ ions through calibration curve at 238-260 nm. Unfortunately, some cases restrict such determination (nanoparticles containment, optical active nature of...

10 February 2024 6,073 1 View

How to get the cyanobacterium Synechococcus elongatus to form colonies on agar(ose) plate?

The process of transforming cyanobacteria requires using plating liquid cultures and picking out colonies. However, when I do this, the cyanobacteria just form a uniform mat on top of the agar...

29 October 2023 1,141 0 View

Films based on HPMC. How to crosslink it to obtain non-soluble film in water?

Films based on HPMC are soluble in any conditions, no any matter of crosslinking reagent or technique, but I shall to made membranes for water treatment from it. I've tried crosslinking based on...

15 May 2023 922 0 View

Does anyone know some methods to convert FEP film into a viscous paste/liquid to use it as a binder?

Hello, dear scientists, I would like to ask, if I buy from supplier some transparent film of fluorinated ethylene propylene (FEP - kind of PTFE/Teflon/Neoflon polymer) of 30-50 microns thickness,...

18 April 2023 6,379 0 View

Complex value test functions for optimization like Rosenbrock or Powell?

Please advise a reference to paper/book/sources with description of Complex value test functions for optimization like extended Rosenbrock or Powell? There are many analytical functions for...

29 November 2022 4,781 3 View

How do you fit fluoride adsorption data on the BET isotherm?

Apparently, one needs the solubility of fluoride. Which salt do we use as a reference?

26 December 2021 5,810 1 View

How does RIN on a carrier affect the phase noise?

Hello, I have a noisy optical source which exhibits relatively high relative intensity noise at C-band. I then amplitude-modulate it at 800 MHz sinewave, resulting in a noisy RF carrier. Later, I...

18 October 2021 9,387 0 View

What type of functions or which attitude do you use towards image/pdf-text parsing?

Lately, I was doing tasks on image and PDF parsing. And I figured out that a lot of users are using modules like Camelot, OpenCV, or Tesseract OCR for that. The only problem is that modules...

16 December 2020 8,742 2 View

How to couple laser light into a resonant bowtie cavity?

Hello, I'm trying to understand how one can input a laser light into a cavity, bow-tie for example, for mode cleaning or SHG/OPO light generating. If all the mirrors are high reflectivity, that...

07 December 2020 2,407 2 View

What is the most quick and reliable method to determine in the field the proportion of cyanobacteria in the natural phytoplankton sample?

We plan to sample a lot of lakes one by one during several days, so we need something quick and reliable to characterize phytoplankton community.

07 December 2019 9,367 7 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

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

How to change the version of the article full-text pdf file?

How to change the displayed full article text to its corrected version? In the file on the page of the journal where I published the article, there was an error in the text, the table is...

30 July 2024 3,229 2 View

Entropy measure and QSPR modeling in Graph Theor. How to construct the table for lengthy equation?

The entropy measured of molecular graphs plays a crucial rule. The network structures in some cases are very lengthy calculations to handle. Some author avoid to construct table where as most...

30 July 2024 3,126 0 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

Why semicircle of nyquist plot is not complete?

While I am doing HER, I noticed that nyquist plots of Electrochemical Impedance Spectroscopy (EIS) is not complete. Will it affect for the Linear Sweep Voltametry (LSV) data? However, I can found...

26 July 2024 7,542 4 View

What is single absorption ESR spectroscopy ?

In the context of Electron Spin Resonance (ESR) spectroscopy, under what conditions is an absorption spectrum considered to be a single absorption spectrum?

25 July 2024 2,325 1 View

Can we fit a gaussian Fit on a LIBS Peak ?

Though much literature suggests fitting a Voigt profile on a LIBS peak, is it also possible to fit a Gaussian profile on the LIBS peak? I have 204 spectra files, and I am building a pipeline for...

23 July 2024 6,127 1 View

What binder would be the best choice to modify glassy carbon electrode with a 2D Material like Graphene or MXene?

I am trying to drop cast 2D Materials on Glassy Carbon Electrode for Cyclic voltametry and EIS purpose. What would be best binders to use?

23 July 2024 5,776 2 View

What does negative readings in spectrophotometer denote. Was testing TSS content of bacterial cultures?

I was performing estimation of Total Soluble Sugar content in bacterial cultures by Anthrone method. Out of 9 samples, only one sample showed positive reading while others had a negative reading...

22 July 2024 9,576 4 View