How can I define a graphics space to make plots like the attached figure below using the graphics package in r?

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GC/MS profiling of microalgal Ethanolic and methanolic Extracts?

Is it imperative to conduct derivatization before analyzing the microalgae extract using GC-MS? What protocol should be followed if derivatization is deemed unnecessary and the extract is ethanolic?

20 February 2024 5,453 2 View

Are FTIR and Raman analysis techniques adequate for exhaustively identifying the bioactive molecules present in a microalgae extract?

17 February 2024 6,186 1 View

How could we explain the formation of fluorapatite?

a soil sample taken from and pld abbey, the soil sample where taken from a room that have a blast-furnace in it, while an x-ray fluorescence gave a concentration of 1.5% of fluor, and an analysis...

10 December 2023 9,287 3 View

Why do we see a limitting current in a linear sweep voltametry and not in a Cyclic voltammetry ?

an expriment done with a scan rate of 0.01 mv/s for CV and 0.005 ms for LSV

03 December 2023 4,562 4 View

Using qgraph package in R to Visualize Complex Relationships Among Variables?

I would like to use correlation analysis to check the co-occurrence of HMs in the sediments and visualize the results using a grid showing the connections between the different HMs within the...

20 March 2023 2,041 0 View

Bootstrap method to estimate the error rate in linear discriminant analysis ?

How to run the Bootstrap method to estimate the error rate in linear discriminant analysis using r code? Best reghais.A

23 January 2023 1,488 8 View

The robust confidence ellipses of 97.5% in robCompositions or compositions packages?

How can I add the robust confidence ellipses of 97.5% on the variation diagrams (XY ilr-Transformed) in the robcompositions ,or composition packages? Best Azzeddine

07 January 2023 8,019 1 View

Spatial and temporal mapping with gstat package?

I would like to use the R package "gstat" for predicting and mapping the distribution of water quality parameters using tow methods (using kriging and co-kriging) I need a guide to codes or...

25 November 2022 8,458 4 View

What ways can I get measurements of ozone and nitrogen dioxide concentrations in an area?

What ways can I get measurements of ozone and nitrogen dioxide concentrations in an area? What satellites provide this type of data and can I use Google Earth Engine to retrieve the data when it...

18 July 2022 7,001 2 View

Can the DRASTIC vulnerability Model be validated with groundwater analysis data composed of : Conductivity (EC) and Fe (mg/l))?

Note that the majority of articles I have read use nitrates as a validation élément for the Model.

23 May 2022 1,669 1 View

How to learn more about SPSS and its Application?

I would like to learn more about SPSS and Its application especially in regards to data analysis. Please suggest me how I can learn more about it. Thank you so much.

11 August 2024 9,101 4 View

Can I base on reverse DNA sequences to perform alignment, convert to amino acids and GenBank submission?

I have reverse sequences (AB1 format), can I base on reverse DNA sequences to perform nucleotide alignment, convert nucleotides to amino acids and deposit the sequence in GenBank database?

11 August 2024 5,138 1 View

Baseline drift in HPLC? What causes this?

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

Text-Communication from the M1 Hand Area using BCI—and then there is Elon Musk?

Willett, Shenoy et al. (2021) have developed a brain computer interface (BCI) that used neural signal collected from the hand area of the motor cortex (area M1) of a paralyzed patient. The...

10 August 2024 7,180 0 View

Has anyone applied Python in the field of textile engineering for data analysis, automation, or smart textiles?

I'm currently exploring the application of Python in textile engineering, specifically in areas like data analysis, process automation, and the development of smart textiles. I'm interested in...

10 August 2024 7,429 2 View

How can I use the cif data obtained from rietveld refinement extracted via gsas2, for microstructural analysis using ETEX software?

09 August 2024 7,718 0 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

How to prepare the nanoparticle treated fungal sample for Environmental SEM analysis?

A fungal strain was treated with nanoparticles. We want to do an environmental SEM analysis. So could anyone share your views on preparing the sample? Thank you.

07 August 2024 5,307 1 View

How to normalize and take the significance of the MTT OD values with 3 replicates for the same cell-line?

Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...

07 August 2024 8,106 4 View

Why does my protein refolded to beta sheet during thermal denaturation analysis?

Hi! So i attempted to understand a novel protein behavior towards heat application by analyzing its secondary structure change. I subjected the protein to a thermal denaturation analysis using...

06 August 2024 1,989 3 View