How we can determine λ(max) of Al2O3 nanofluid by UV-Vis?

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Why does zinc chloride salt powder melt at 50 degrees?

I have a question about zinc chloride salt powder. When I put zinc chloride powder in an oven at a temperature of 50 degrees to dry it (because it may absorb moisture), after about an hour, the...

26 November 2020 3,751 3 View

What kind of microscope should be used to investigate the stability of the Emulsion Liquid Membrane(W/O/W)?

I want to know what kind of microscope should I use to check the stability of dual emulsions (W/O/W)? upright or invert? Fluorescence or polarized or ordinary light? What field of vision should I...

12 November 2020 6,044 3 View

How copy molecules in random position and orientation in material studio?

Hi everybody. I want to simulate a super molecule in a solvent like heptane in material studio. Solvent molecules are about 700 and are around the super molecule. How can I simulate these...

07 September 2018 7,643 4 View

Howdo you complete the drying of alcoholic extract?

when we prepare a hydroalcoholic extractof a plant, after evaporation in vacuum condition, we do not have a completely dried extract. What do you do for completely drying these extracts?

28 January 2018 8,328 2 View

Production and stability of WC-Co powder suspension?

I appreciate any information regarding your experience with dilute suspension (

14 January 2014 7,192 7 View

Does anyone know a simple protecting group for thiol in the presence of NH group?

We want to protect the S of methimazole, does anyone have any suggestion?

22 November 2013 4,267 7 View

What is your idea about "negative intercept" in calibration curve in HPLC? Can you recommend a good book on this subject?

08 March 2013 485 4 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Why initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

Is this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 View

Model Volume fraction and magnetic field applications of nanofluids in ANSYS?

Hi I am working recently on a project where I have to study how the thermal properties or heat transfer enhancement of nanofluids as the volume fraction changes, or if a magnetic field is applied...

22 February 2021 961 2 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

How to model static fluids in ANSYS?

Hi I was wondering if there is a way of simulating static fluids (including brownian motion) of nanofluids in ANSYS. I am currently working on a theroretical based project where I am trying to...

20 February 2021 776 1 View

In methylene blue test Why is UV absorbance reading very low as soon adsorbent is added and then increasing before reaching equilibrium?

Hello, I'm working on removal of methylene blue. 01. in the dark test very first reading is taken 15 minutes after adding adsorbent to the dye solution and that UV absorbance reading is very...

19 February 2021 472 5 View

Is nanotechnology part of materials science? Is it possible to obtain Pico technology and move from hypothesis to application?

Pico-scale This is three orders of magnitude smaller than a nanometer (and thus most nanotechnology) and two orders of magnitude smaller than most chemistry transformations and measurements. Pico...

18 February 2021 4,540 5 View

Unusually Busy Raman Background?

Hello, I am observing a nearly periodic background spectrum for a wide variety of SERS substrates. I see this response (attached below) for bare Au films, Cu films, and Au nanoparticles on...

15 February 2021 9,922 5 View

Mohamed A Elbagerma

check the attached file to get article may be will help you

Yousef Zeraatkish

you can disperse the particles in a liquid such as water or ethanol via ultrasonic dispersant probe and then using vis spectrum from 200 -800 nm.

be happy

Hosein Kamani

you can mesure the UV- Vis spectra and draw the plot lamda Vs reflectance at faculity of physic in sharif university. No of Lab=125 Ms karimi