Recommendations on CO2 Resistant Rocking Shaker?

A certain protocol we have developed requires the use of a Rocker/Rocking Shaker in which our dishes with cells are maintained in the incubator. The rocking is essential to the protocol but we...

09 February 2021 3,291 1 View

Do you consider it is important to vindicate Spanish as language, in scientific issues and publication of scientific articles?

03 February 2021 3,756 4 View

How to calculate the difference in the electron density of a dimer and its monomers?

Hello, I need to calculate the difference of the electron density of a dimer and the the sum of its monomers. I tried G09 without success, even using nosymm in all calculations. The problem...

15 January 2021 9,537 3 View

How to interpret hierarchical regression when a predictor is no longer significant after new variables are added?

Hello everyone: What does it mean when a variable is significant in one step but then in the next step it's no longer significant? For example, in this article...

29 November 2020 7,354 3 View

How to estimate the optimal cutpoint for a binary outcome in python?

Hello everyone, I have a dataset of diabetic patients which has been used to train an xgboost model in several outcomes such as stroke, amputation, and more. Originally we used the continuous...

21 September 2020 4,970 3 View

Does anyone has achieved the installation of gromacs plugin in PyMol, complete in Linux, with its graphic interface?

I am using Ubuntu 20.04 and I have PyMol installed, with a license. But it has been impossible to add the repository ppa:makson96/dynamics. Even downloaded from github, the package with the...

20 September 2020 6,870 1 View

How to perform power analysis for a one-way ANOVA in R when treatments variances are not exactly the same?

Hi! I've been trying to perform a power analysis for a one-way ANOVA in R using the pwr package. The equation that is employed for this is based on Cohen's f and assumes that variances among the...

16 September 2020 6,098 3 View

How do you find the electrons that occupy a particular orbital in VASP?

I think this question has already been presented here on this forum, but I was not very clear. I'm running VASP calculations involving a mixture of transition metal atoms like Fe, Mn and Co in...

07 September 2020 7,228 3 View

Why doesn't my dbRDA show all the environmental variables considered?

I am performing a db-RDA in R using the package Vegan and the function capscale. I have taken into account 24 environmental factors but the program only considerate 7 of this factors. I have 54...

26 August 2020 919 6 View

How to give to an image color a single representative value?

Hello, I am trying to associate the color of an image to a single numerical value. Images (see attach) correspond to different aloe samples that change in color according to the degree of...

15 July 2020 192 4 View

What information can be had from raman at higher wavenumber?

i have recorded raman spectra of strontium oxide thin film. the spectra were recorded in the range 400 to 4000 cm-1. i have reference to peaks upto 1000cm-1. but i couldn't find literature for...

26 February 2021 2,499 1 View

Is it possible to have two luminescence bands of the same peak position but with different intensities in single spectrum??

Hi! If it is possible to have two luminescence bands of the same peak position in a spectrum, what is the reason behind formation of two separate bands instead of one? This phenomenon is related...

26 February 2021 4,963 5 View

How can I find a Raman spectrum wavenumber corresponding to what compound?

I have several Raman spectra with very distinct peaks at certain wavenumbers, such as 277, 359, 466, 583, 623, 686, and 795cm-1. How can I identify them to what compound(s)? The RRUFF and others...

24 February 2021 363 3 View

What are difference between laser diodes, simple light emitting diodes and power light emitting diodes when operated in the visible spectrum ?

I want to illuminate a scene (small space) using LED to capture photographs or videos of some tiny objects inside the space. But am not sure if I should use a Laser LED, or simple LED or power...

22 February 2021 4,240 4 View

What low-cut filter (high Pass frequency) to be used for response spectrum (Tripartite plots) ?

What low-cut filter (high Pass frequency) to be used for the response spectrum (Tripartite plots)? I am currently working on differentiating between hard/soft site responses in Indo-Gangetic...

21 February 2021 9,273 2 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

Interpretation of a fluorescence Emission spectrum ?

Hello, i work with a spectrometer which only render the fluorescence emission spectrum. Until now i just found how to interpret an exitation- and emission spectrum together to generate deeper...

20 February 2021 1,291 3 View

How to open an old ".MTS" file containing spectroscopic data?

Hi supreme hive-mind of the internet, we have some old *.MTS files that are supposed to contain spectroscopic data, probably some coordinates and a long list of single line spectra. Basically,...

16 February 2021 9,385 2 View

How to detect uv vis spectrum of nanoparticle under 300nm?

I try to make the indium nanoparticle and check the uv vis spectrum. I heard that In nanoparticle has surface plasmon resonance peak at 200~300nm. But most of solvent has absorption peak under...

14 February 2021 6,950 15 View

DMAE (deanol bitartrate)- dimethylaminoethanol bitartrate?

Hello all... I m looking for a method for assay DMAE (deanol bitartrate)- dimethylaminoethanol bitartrate in aqueous samples (cosmetic product) using GC- MS mass spectrum HP- 5 ms U.I 0.25...

13 February 2021 7,629 3 View