What test should I use to compare two or three means, if data is not normally distributed but sample size is > 30 in each group?

I personally feel this as a most confusing question. As per my understanding, if sample size is > 30, and sample is skewed, we can still use paramteric approach, as it will follow Z...

01 March 2021 1,587 6 View

Why are there two reduction peaks in my cyclic voltammogram?

When I measured the cyclic voltammogram of palladium in the pbs solution, two reduction peaks appeared. This did not match the literature I saw. Why? And how can I find the possible reaction...

20 February 2021 2,486 3 View

How can I get rid of the bubbles in the SBS membrane?

I used methylcyclohexane/ ethylcyclohexane / n-butyl acetate mixed solvent to dissolve thermoplastic SBS & terpene resin. The mixture is then poured onto a glass substrate. After solvent...

24 January 2021 8,306 3 View

No title

13 January 2021 2,487 1 View

Which configuration of seawater treatment is better?

Hi world, I have a curious question about desalination of seawater. Since seawater contains a alarming amount of suspended solids and salt (35 ppt). Which of these configuration is more viable...

03 January 2021 2,383 2 View

Why oxidation with peracetic acid engender staining of oxytalan fibers with clastic tissue stains?

Just a quick question above, this oxidation method is mentioned by literature, but no one talked about the principle. Can anyone figure out how the oxidation works on any specific group?

20 December 2020 5,878 1 View

Is this yeast contamination and how do I get rid of it?

I received this gastric tumor biopsis and processed using standard protocol to establish gastric cancer organoids. Contamination looks like this. I have never seen this before and the culture...

08 November 2020 8,541 4 View

I am trying to design a desalination reverse osmosis membrane system. May I know is there a way to obtain the calculation steps for the design?

Designing a desalination reverse osmosis membrane system. Could someone recommend me some designing publications or a step by step calculation guide for the design? Much appreciate. Thanks :)

06 November 2020 7,565 3 View

Does any one can help to calculate viscosity using molecular dynamics. I am doing the NAMD SIMULATION using amber force field?

My system consists of ionic liquids, aliphatic and aromatic hydrocarbons. Any suggestions and any script for calculation of viscosity?

24 September 2020 6,640 1 View

Can someone suggest the method of calculating the solubility of any solute in solvent by NMR ?

By performing 1H NMR Analysis

22 September 2020 5,849 2 View

Can water be extracted from Olivine?

I have always been interested in geology and wondered about how unique structures of materials behave in different circumstances. I stumbled upon Olivine, the magnesium iron silicate, and heard...

28 February 2021 7,330 4 View

How much cell pressure and back pressure should I apply to start for triaxial test for different types of soil?

We have recently purchased a triaxial test instrument (MATEST) for testing different types of soil. After installing software, we are facing a issue of saturation where the samples does not...

23 February 2021 7,194 4 View

Are there methods for automatically mapping floodplains, fans and terraces?

I want to map these river geoforms with as little subjectivity as possible. I have a high resolution DEM generated by drone data.

22 February 2021 7,800 3 View

Is it possible to prepare clay minerals by mixing pure oxides of required elements? What would be theoretical difficulties with it?

Practically this is not at all necessary. But theoretically, would hydrous/hydrothermal synthesis be enough (like mix 1 mole alumina gel and 4 mole silica gel and gently heat) or would it require...

26 January 2021 6,403 3 View

Do you have information about synthetic diamonds and their environmental impact?

I am doing a deep research on the comparison of the process of extraction of natural diamonds and synthetic diamonds, and their environmental impact I would appreciate you could share your...

19 January 2021 1,359 3 View

Johnson et al., 2006 Geology of South Africa?

I am wondering if there is a digital (PDF) version of this book available or if anyone is willing to share this work. It is no longer available from GSSA (Geo Soc. S. Afr) nor does my library hold...

13 January 2021 5,571 2 View

Is there any chemical environment or parameters to define or explain the sediment and soil profiles, are they separated by chemical parameters?

Sediment is relatively younger than the soil in the depositional environment as the sediments are consequence of the accretion of particles transported either by waters or by winds, whereas, soil...

12 December 2020 4,822 18 View

How to model a graphite-bearing rock using Perplex (pseudosections)?

Dear all, I am struggling to model a rock which contains the assemblage K-white mica + Na-white mica + chlorite + quartz + graphite + rutile. I have followed step by step the tutorial available on...

22 November 2020 2,387 2 View

What is New Next Generation Attenuation Relationships (NNGAR) and how are they different from other attenuation relationships?

Dear researchers The provisions of ASCE 7-10 states that New Next Generation Attenuation Relationships (NNGAR) has been used in the process of Probabilistic Seismic Hazard Analysis (PSHA) to...

15 November 2020 1,132 4 View

Carbon dioxide sequestered as Blue Carbon in mangroves soil four times more than that of the green carbon, but obtained data does not reflect, why?

Mangroves have the ability to absorb up to four times more carbon dioxide by area than upland terrestrial forest ecosystems, carbon dioxide is stored as blue Carbon in the sediment of the...

27 October 2020 2,262 4 View