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26 December 2020 9,690 3 View

In dissipation engineering. Why the microscopic mechanisms of damping are limited by low frequencies?

I am starting working on damping in metamaterials, and I found the following statement that caught my attention: "Dissipation engineering at the macroscopic level is additive; it builds on what...

05 June 2019 9,566 4 View

How can I improve a DNA extraction from serum?

Hi everyone! I'm working on a DNA extraction from serum. Unfortunately the concentration was very low and the PCR amplification didn't work, maybe because the DNA extracted was very fragmented. Do...

23 August 2018 4,155 3 View

How can I improve a DNA extraction from serum?

Hi everyone! I'm working on a DNA extraction from serum. Unfortunately the concentration was very low and the PCR amplification didn't work, maybe because the DNA extracted was very fragmented. Do...

07 August 2018 518 4 View

What is the most cost and time effective way to assess the isoprene synthesis capacity of a poplar leaf?

Dimethyl allyl diphosphate (DMADP) is transformed to isoprene and pyrophosphate (PPi) thanks to the isoprene synthase. Is it better to: - measure the concentration of isoprene synthase assuming...

05 June 2018 3,208 2 View

Is it enough an Exonuclease treatment before sequencing?

Hi everyone! I would like to know if an exonuclease I treatment after isolating DNA samples from an agarose gel is enough for sequencing. I know that it is recommended to use ExoSap which...

04 May 2018 5,413 4 View

How Can You Prevent Nanoparticle Agglomeration in Solution?

In trying to store and analyze some iron oxide nanoparticles I find that they agglomerate and so I cannot measure them by DLS. My particles are coated with a polypyrrole polymer shell. Should I...

22 January 2018 6,778 5 View

What buffer should I add to the Krebs-Henseleit solution to counteract the rise of the PH while using pure oxygen instead of carbogen?

I am currently working with the Langendorff's Isolated Heart System and I have some problems with the Krebs-henseleit solution due to a change we were force to do after we ran out of carbogen and...

04 October 2017 9,914 2 View

Why do I get a pink pellet during RNA extraction after isopropanol precipitation and centrifugation?

15 October 2014 7,314 6 View

Can anyone help me setup a particular relative humidity with salts?

Hi, I want to set up 59% of relative humidity, which salt do I have to use? Thank you very much.

06 July 2014 9,396 5 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 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

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View

Is there a powerful system for the security of the systems distributed on IoT systems?

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View

Can NFL theorem be valid in infinite search space in ML?

NFL theorem is valid for algorithms training in fixed training set. However, the general characteristic of algorithms in expanded or open dataset has not been proved yet. Could you show your...

01 March 2021 1,189 3 View