When comparing two very similar surveys taken over time, but with different sample size, what would be the best way to approach this problem?

Hi, I'm currently analysing a survey for a university course design, and some guidance would be very much appreciated. The students who are enrolled in a (year-long) course were given a link to...

08 December 2020 6,624 9 View

When analysing survey using Likert scale, is it okay to use Friedman's test?

Hi, I'm currently analysing a survey for a university course design, and some guidance would be very much appreciated. The students who are enrolled in a course were given a link to participate...

06 December 2020 6,060 2 View

How to use CCDC to find CIF files?

Seems like a silly question but I'm having trouble with searching for CIF files via https://www.ccdc.cam.ac.uk. I've used it before but I was on university campus so I think I was able to use more...

25 March 2020 1,271 3 View

Did anyone ever tried to extract springtails from muck soil with Berlese funnel?

We tried this last summer, but with no results, even if we were able to see them on the ground. We have already test for different heat sources (60W, 25W, 10W)...It seems that nothing is going...

01 February 2019 1,960 2 View

Why do I get variation in ELISA (sandwich) results?

Hello, we have been performing in our lab a validated ELISA test and we are getting a lot of variation in results. We have a std curve with each test and we also include a control sample and we...

02 March 2018 3,014 5 View

Can the result from Zetasizer analysis considered as the size of the nano particle?

11 May 2017 5,099 9 View

What is the process used to coat Ag with PVP? Could one just mix PVP with AgNP in distilled water and shake it?

Appreciate any input

10 January 2017 923 3 View

How to measure magnetic nano particle (iron) grain size without chemical compound?

Since SEM and TEM both have metal probe, I am wondering if there is any other way to measure magnetic nano particle (iron) grain size without chemical compound. I know that XRD could be an option...

12 July 2016 8,071 1 View

Perform classification data mining on attached dataset using Weka to build model that could be used to predict lateness?

Please help!!! I am new to Weka, and have to do a project for school regarding classification. Is there anyone familiar with Weka that would be willing to point me in the right direction? Thank...

19 April 2016 4,144 2 View

What is the influence of fluid leakages on vortex generation inside the diffuser of a pump tested in air?

When a pump is tested in air, fluid leakages are entering inside the pump through the gap betwen the impeller and the diffuser for some flowrates. These fluid leakages can significally modify the...

20 February 2016 4,696 3 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 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

No title

02 March 2021 3,060 3 View

How to quantitative analize the data of TNBS assay for gelatin?

Estemeed colleagues, I found some issues regarding the quantification of the data for TNBS assay. There are different protocols on how to perform that but it is clear to me the "fil rouge" that...

02 March 2021 2,616 1 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View