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

What are the environmental variables that influence the Northeastern gray whale population?

I am currently working on my M.Sc. thesis studying how climate change affects the presence of the gray whale in one of its main breeding areas in Mexico. We have considered temperature,...

16 November 2020 8,944 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

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Is there any test to determine the cardiovascular risk of patients with obesity? from the perspective of obesity?

We found tests to determine cardiovascular risk taking into account lipid profile, blood pressure, age, history of diabetes, other laboratories. But when weight is involved, there is a paradox. I...

02 March 2021 6,036 1 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

Sutter electrode holder leaking after applying positive pressure. How to fix?

I am using a Sutter electrode holder for my patch clamp experiments, but I'm having trouble keeping positive pressure inside my electrode due to a leak out of the back of the holder. I have added...

02 March 2021 5,829 1 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View