What statistical test should I use to compare SDs in R?

I'm currently doing some analysis for my dissertation project and I was wondering what statistical test is best to perform. I have to compare the SDs of each participant (64 participants with 64...

07 February 2021 4,837 4 View

Where could I purchase whole cells with 5-HT (serotonin) 1B receptors?

Hi! I would like to study 5-HT 1B (Serotonin 1B) receptors and conduct a Gi CAMP assay on it. As you know, this is a functional assay that requires whole cells and not membrane preparations. Do...

19 January 2021 3,614 2 View

Any leads on open-source RI libraries?

Hi! Does anyone know any libraries where we can access retention index data (gas chromatography) of aroma compounds for free? Thanks!

07 December 2020 1,951 1 View

Is European Journal of Education Studies a good journal for publication of an article from a dissertation?

I sent an article to the journal and the reviewers indicated that the work can be published as it is. there were no suggested corrections and this left me wondering if its a recommendable journal....

19 May 2020 8,131 3 View

COVID-19, lockdown and the transition from physical to virtual online classes?

After COVID-19 outbreak was declared as pandemic, may countries including India face mounting pressure to close universities including my university, Sikkim University. After lockdown was imposed...

12 April 2020 3,781 19 View

Is it okay to use Technical/Laboratory Grade solvent for extraction and open column chromatography?

Some would say that the process of separation through the use of high-grade silica and other chromatographic materials will eventually result to separation of impurities so it's okay to use...

12 January 2020 9,987 5 View

How do you improve peak separation in this case (Please see attached picture) ?

How do I improve the peak shape and resolution in this region of the chromatogram? Analytes are volatiles in the headspace of rice. Column is DB-Wax-- a column reported to be successful in...

24 November 2019 7,250 3 View

Why are there broad, irregularly-shaped peaks that elute early in my gas chromatogram ?

We just replaced our GC-FID with a new column and conditioned the column before using it. When I started my running blanks and samples using a specific temperature program, there always appears...

13 November 2019 9,378 3 View

Why are there fewer peaks in a gas chromatogram with longer run times than with shorter run times?

Lengthening my GC run time from 14 min to 34 min resulted in fewer peaks. The target compound that I am trying to quantify is not detected whenever I run my samples (same extraction conditions)...

08 October 2019 7,512 6 View

Can anyone recommend a good SEC-HPLC column that can be used with peptides at pH 2.5?

I am intend to buy a SEC-HPLC column that is suitable to used with the peptide Glucagon(29 amino acids) at a pH=2.5. Can anyone recommend a column that might be suitable? The company, APEX, that...

29 August 2019 6,027 1 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 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

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

Has anyone had luck using cell lines other than HEK 293 (such as COS1) to package lentivirus?

I am looking to package lentivirus in endothelial cells but I am opposed to using 293 cells due to personal ethics regarding the source. I have done some reading and saw that COS1, COS7, & CHO...

25 February 2021 3,030 1 View

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25 February 2021 5,713 1 View

Implementation of chance-constrained optimization problem via scenario approach?

23 February 2021 7,826 2 View

Fictitious Boundary Meshing Method (FBM) in Commercial FEA software?

Is it possible to implement FBM in a commercial FEA software package, such as FEMLAB, COMSOL, or open source software like Moose?

22 February 2021 2,968 1 View

Are there packages (R or Python) for simple models (bucket?) to assess soil water content?

Hi everyone. I am researching droguht effects on soil water drought. I am looking for already implemented functions in R or Python to estimate soil water content from precipitation,...

21 February 2021 2,084 1 View

Why at farmer level Cow/Buffalo are not done artificial insemination just after 2 month for yearly calving?

Physiologically in cow, oestrous heat again goes on the peak after 2 months but locally this is not observed and AI is after two months but done after at least 6 months.

17 February 2021 685 4 View

Possible reasons for high bioavailability after I.M and S.C. routes...?

What should be the possible reasons if we obtained more than 100% bioavailability of antibiotics (marbofloxacin) after I.M. and S.C. routes of administration in cattle species.

16 February 2021 971 4 View