Małgorzata Lempart-Drozd

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Questions related from Małgorzata Lempart-Drozd

What is optimal electron accelerating voltage for TEM measurments of polystyrene nanoplastic?

What is optimal electron accelerating voltage for TEM measurments of polystyrene nanoplastic? (200-300kV - would be too high?) I found in literature most PSNP studies with ~100kV.

03 October 2024 5,531 1 View

Thermal degradation of polystyrene using QMS system: what does m/z=39 come from?

Hello everyone, I would like to ask about thermal decomposition of polystyrene using TG-QMS system - thermogravimetry coupled to quadrupole mass spectrometer. During thermal degradation of pure...

15 February 2023 8,593 3 View

How can I prevent microbial growth during months of lab experiments in water columns?

I am planning lab experiments in open columns with DI water and various inorganic particles, lasting per months. The columns with suspensions will be exposed to the sunlight or to artificial UV...

23 September 2022 8,915 0 View

What are the suspended minerals paricles in seawater?

I am interested in the minerals particles suspended in seawater. What are the minerals? Carbonates, silicates, what more? Which clays are the most common? Could someone provide articles related to...

20 August 2021 6,577 6 View

Concerning Mossbauer spectroscopy: large QS for Fe3+ in Fe-silicates ? It is possible in minerals?

After fitting Mossbauer spectra for Fe(II)-silicate heated at air to 700degC, I observed uncommon, very high quadrupole splitting parameters for Fe3+, I suspect in very disordered environment (?)....

04 May 2021 5,182 5 View

Could Fe3+-bearing ferrosilite (here rather orthoferrosilite)transform into magnetite under specific high-temperature condition?

A sample, that I tested, after heating up to 800degC in N2 transformed topotactically to ferrrosilite probably containing Fe3+ (using Mossbauer and XRD), next after heating up to 1050degC I...

29 March 2021 191 4 View