Sampling size for unknown population?

Lets say I am sampling from an non-normal, multivariate population of unknown size and distribution. I'd like to know when I can stop sampling from the population (to a certain error) and have a...

08 September 2018 1,221 6 View

TAE buffer vs TE buffer for DNA stock storage?

Hi, Can DNA stocks be resuspended and stored in 1x TAE buffer vs. 1x TE buffer without negative effects? It would be simpler for my process to store the DNAs in TAE, however most sources recommend...

01 February 2015 9,166 0 View

Matlab, Keithley 2410, Current vs time?

Hi, I'd like to apply a fixed constant voltage using a Keithley 2410 and read out the current with respect to time using Matlab and SCPI commands via a USB/RS232 connector. I am using MaxOS,...

11 December 2014 6,988 2 View

What is the best Theory / Basis Set for graphene simulations in Gaussian 09?

I'm trying to do g09 simulations to obtain raman spectra of nanographene flakes (~ 24 carbon atoms) doped with nitrogen. Can you suggest a theory / basis set to use? Are diffuse orbitals...

05 June 2014 7,775 8 View

What is a good test (e.g. colormetric) for aminooxy groups (R-ONH2)?

I have seen Canaline and Jaffe's test, but I am not sure this is what I am looking for.

05 June 2014 518 2 View

Can gaussian09 be used to simulate valence band spectra?

And if so how?

02 March 2014 2,416 3 View

Can you recommend a cell line alternative to retinal ganglion cells?

I would like to test for adhesion and viability of retinal neuronal cells on materials.

10 November 2013 2,394 3 View

Any advice for impedance matrix construction?

I'm trying to construct a 2-terminal impedance matrix as described in the link. My network has multiple meshes. For non diagonal Zij elements where meshes do not share borders, what should the...

10 November 2013 3,751 3 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

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

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 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

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 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

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 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