How to solve failure of Fluent calculation (Error: floating point exception / Error Object: #f)?

Hi everybody I'm stuck with this error and I dont know what to do to solve this problem Initialization is ok but when I start my calculation this error appears (Error: floating point exception /...

25 January 2021 8,091 3 View

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I am carrying out a project where I evaluate adsorption of this reactive dye with clays, and I want to know in acidic pH how the structure changes. Thanks

23 January 2020 8,126 2 View

Moderated Mediation Analysis using Process Macro - Interpretation?

Hello, I have two questions related to the output of Process Macro for SPSS for Model 7 (Moderated mediation analysis). 1) I run the analysis but figured something strange (maybe it's not but...

30 May 2019 2,797 1 View

How do I remove debris from a beads suspension?

I have a suspension of 40 um beads (2 mL at 400 beads/uL) and I noticed that there are a lot of debris in it. I need to remove them as much as possible to obtain a suspension with no or few...

23 October 2016 7,569 3 View

Can you please suggest any laboratory methods to make conjugates of indomethacin with amino acids?

We are working on conjunction of indomethacin with amino acids and experiencing certain difficulties. Please share any suggestions you have on lab methods, choice of solvent and confirmation of...

03 March 2015 2,129 1 View

How do I choose contrasts in SPM8?

I am learning how to use SPM for PET and PET-MR analysis, but I haven't found any great resources that explain how contrasts work. I have a series of PET images where our hypothesis argues that...

24 February 2021 1,534 2 View

Three-way robust ANOVA in R?

I am trying to conduct a three-way robust ANOVA in R using the WRS2 package as: t3way(Stem ~ Species*Temperature*Salinity, data = tutto) and there is an error saying : Error in if...

22 February 2021 1,674 8 View

Can anyone help with an Accurate Diffuser Expansion Loss formula for rectangular shaped diffusers in turbulent flow regime?

I have tried Idelchik's Handbook of Hydraulic Resistance 4th Edition (2007 page 300) formulas and across some range the formulas are reported valid for, the law of conservation of energy is...

20 February 2021 2,504 1 View

What are backpropagation formulas for residual neural networks?

14 February 2021 4,194 3 View

Why would one go up and then down with gradient during HPLC?

I think I've seen it previously, but the current example is from this publication https://www.mdpi.com/1420-3049/14/5/1825 where they used the following gradient on HPLC: min ... % MeOH 0 ... 2 20...

09 February 2021 5,422 3 View

How do I dissolve cannabidiol (CBD) and crude hemp extracts in 1:1:18 ethanol:tween80:0.9% saline for IP injection in mice?

I have tried dissolving CBD and crude hemp extracts in 1:1:18 ethanol: tween80: 0.9% saline. I dissolved the drugs in ethanol first then tween, after 10 mins sonication the solutions looks ok but...

27 January 2021 6,259 3 View

Difficulties purifying Outer Membrane Vesicles using a Sucrose Density Gradient: Unable to detect any protein after this process?

I'm currently trying to purify Outer Membrane Vesicles (OMVs) following their extraction from the bacteria I'm working with. After the initial extraction the concentration of protein seems good...

27 January 2021 6,852 3 View

PCR primers bind to specific DNA at specific temperatures but not other temperatures?

I ran PCR in order to analyze a P-element excision on a mutant drosophila line. My results were not conclusive, however that is beside the point. I ran a temperature gradient in order to optimize...

25 January 2021 9,164 11 View

What time and speed should the centrifuge be set at in order for cell debris and clumped proteins to form a pellet?

- The Eppendorf tube was then placed in a microcentrifuge. Notice how it is balanced with another tube placed opposite it in the centrifuge drum to ensure smooth rotation. Other information...

24 January 2021 2,547 3 View

How to check "no blast hit" sequences of NGS data output?

My environmental sample was analyzed for fungi by both DGGE (18S) and NGS (ITS2), resulted in some different names (in the top 5 of strong bands in DGGE, or most abundant sequences in NGS) between...

21 January 2021 5,310 3 View