How to determine cadmium ions in water media via UV-Vis spectrophotometry? I need as simple as possible method
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
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 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
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
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
Apparently, one needs the solubility of fluoride. Which salt do we use as a reference?
26 December 2021 5,810 1 View
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
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
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
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
A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...
11 August 2024 9,801 2 View
Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!
11 August 2024 3,770 4 View
I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...
08 August 2024 8,329 0 View
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
I conducted an adsorption experiment of arsenic on soil in the presence of different doses of silicon as competing ions to see the effect of silicon on arsenic adsorption and desorption. I took 5...
03 August 2024 6,500 3 View
I'm researching light sources and their UV emissions. I'm curious if a 50W, 7500K conventional LED lamp emits any UV light. I found that a 200W tungsten lamp can emit up to 1.5 mW/cm² at 350 nm....
31 July 2024 3,843 7 View
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
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 can we calculate the percentage of configuration interaction (CI) in the UV output data of the Gaussian program? for example: Excited State 17: Singlet-A 5.1359 eV 241.41 nm...
28 July 2024 9,165 2 View
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