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 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

Google Earth Engine for Multitemporal analysis (Land Use Land Cover Change)?

Hello. I am reading about Google Earth Engine (GEE) and their applications for vegetation, landcover and agriculture mapping. I am analyzing an area of 20Mha to determine a multitemporal changes,...

01 May 2020 2,059 11 View

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04 March 2020 2,681 3 View

Is it possible to calculate pIC50 of a plant extract?

Is there a way to calculate the pIC50 value of a plant extract? As far as I know, in order to calculate pIC50, the IC50 must need to be in molarity, therefore, it's not possible to get the value...

08 January 2020 8,540 3 View

Why do my protein samples and standards get stuck running Western blot?

When I'm running an 8% SDS-PAGE gel at 100 V, my samples and standards get stuck after a while. Does anyone know why this is happening? Thanks!

20 May 2019 7,797 3 View

PAGE conditions in WB pro-IL-1beta?

Hi! I would like detect pro-IL-1b from rat cells lysate at 8h of stimuli. Can you recommend conditions like gel concentration and transfer time/mAh? Thanks you

31 August 2018 5,210 4 View

Why are bands seen in series on SDS-PAGE electrophoresis?

Hi, my lab assistant performed an SDS-PAGE electrophoresis as follows: Load order: well 1 corresponds to the standard, well 2-3-4 correspond to BSA proteins, Cytochrome c and Wheat germ acid...

15 October 2017 3,557 2 View

Method to measure tryptophan?

I work in tissue explants of placenta. I need quantify the concentration of tryptophan in the supernatant or homogenate. I know that quantify it is possible by HPLC, but I would like to measure by...

13 June 2016 918 3 View

Method to measure tryptophan?

I work in tissue explants of placenta. I need quantify the concentration of tryptophan in the supernatant or homogenate. I know that quantify it is possible by HPLC, but I would like to measure by...

05 June 2016 3,826 3 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

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

Can we distinguish the type of free fluid inside the pelvic and abdominal cavities whether blood or serous fluid using the ultrasound?

during ultrasound examination of acute abdomen, sometimes we see free fluid , can we know the type of fluid ,whether blood or not , using ultrasound only? if yes , what are the sonographic...

01 March 2021 7,476 4 View

How much pressure we can reduce at the outlet to avoid Reverse Flow?

I am simulating Heat Exchanger. I have tried and tested all the methods to resolve this issue from the internet like refining mesh, improving skewness and orthogonal quality ,extending outlet to...

01 March 2021 6,985 3 View

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

How to increase mesh quality of a cfd model in ansys fluent?

How can one improve mesh skewness, orthogonality, aspect ratio?

28 February 2021 7,730 3 View

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I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...

25 February 2021 2,615 3 View

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

Is the a way to contol flow (Flow velocity) without impacting pressure value?

I have a pipe with 10 mm in Diameter and 2 bar pressure, the fluid velocity is 200 m/s, the fluid is air. is there a way to reduce velocity without affecting the pressure value?

25 February 2021 7,187 3 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View