Anastasios Varkoulis

4 Questions 1 Answers 0 Followers

Questions related from Anastasios Varkoulis

Hierarchical cluster between groups?

I have observations of 4 species and want to see the similarities using clustering method. I get a dendrogram containing all observations showing species A in cluster 1,species B and C in cluster...

15 July 2022 530 3 View

Can I mix powder derived from shells of different organisms from the same species and sample collection for Xrd analysis?

I need to analyse multiple samples in the form of powder using X ray diffraction. Can I mix powder derived from shells of similar organisms from the same species for qualitative and quantitative...

20 March 2019 4,692 3 View

Should I rather perform an XRD-analysis on CaCO3 or MgCO3 regarding the shell of sea urchins?

I would like to perform an XRD analysis on ground samples of sea urchin test. Would it be more effective to search for CaCO3 or for MgCO3 and why? Thank you in advance.

27 November 2018 2,626 1 View

Ways of maintaining constant pH of salt- or seawater?

Is there a way to maintain pH of Saltwater or even better seawater constant without using CO2 while having inserted hard tissue of sea urchin in it?

04 May 2018 5,730 2 View