Can CMOS and CCD images sensors be used as microphones?

I was thinking about Msps and Gsps image sensors in different environments. If a pair of identical image sensors - one exposed to air, gases, plasmas, or partial vacuum - and one in a good...

21 December 2020 9,747 2 View

Proper method for assessing model invariance following Confirmatory Factor Analysis (CFA) and preceding 2x2 between-subject analysis?

I have produced a good-fitting, reliable baseline model according to CFA. The model contains several factors each loaded by several categorical (ordinal) items. I ultimately intend to analyze the...

15 December 2020 1,668 4 View

Hello researchers, can anyone help me with this Structural Decomposition Analysis (SDA)?

I am using Economic Input-Output Life Cycle Assessment (EIO-LCA) model I need to decompose this equation W= P*F* L* Yc* Yg to generate 120 forms. where W is a vector of total water withdrawal...

20 November 2020 4,194 3 View

How do I better visualize protein interactions at edges of periodic box in VMD?

I have a 500 ns molecular dynamics trajectory with several proteins in a membrane. The entire system is enclosed in a periodic box. Unfortunately, my proteins are only interacting around the...

11 November 2020 6,912 3 View

How does one decribe an HPLC chromatogram in a results section?

I happened to use HPLC in a project and the chromatograms are out. As a biologist, I don't really have the technical understanding to fully interpretate the results. I would like to know what to...

16 October 2020 7,006 5 View

Which part of the ovarian follicle in poultry can I use for RNA and protein extraction. The outer layer or the inner fluid?

Should I use the covering of the follicle or the liquid fluid for RNA and protein extraction. Which technique is easier to use

01 September 2020 3,094 3 View

How expensive are commercially available customized molecular dynamics services?

I am interested in potentially using commercially available customized HPC molecular dynamics simulations. However, I cannot find pricing information on the websites of the vendors. Could someone...

07 June 2020 9,137 3 View

What is the role of journals' reviewers? Should they be absolute judges?

- Ask questions where they are not sure/convinced about a statement/conclusion VS reject a statement/conclusion where they 'think' it is not correct? - Provide suggestions to improve a...

21 May 2020 2,624 7 View

What is the importance of social network analysis in research?

Beyond the beautiful lines or webs showing how connected an individual is, what other meaningful analysis could be done? for instance, are those directly connected the the individual more...

06 February 2020 5,574 3 View

Does EDC/NHS coupling act on primary amides or only primary amines?

I want to use a coupling reagent (possibly EDC/NHS) to link gold nanoparticles to primary amines and NOT primary amides. There are both primary amines and primary amides in my sample, but I want...

16 January 2020 7,378 4 View

Standard curve shifting over time. How do I stabilise the ELISA?

24 February 2021 1,365 3 View

How does the injection volume impact LLOQ and ULOQ in regression analysis (LC-MSMS)?

Hello, I have run into an issue that has sparkled a debate at work: is the LLOQ/ULOQ impacted by injection volume under the following circumstances: 1) Same dilution factor of all samples 2)...

23 February 2021 9,159 3 View

Using the Pfaffl method: Is it possible that the ratio of the calibrator does not equal 1?

Hi all, I have a question regarding calculations using the Pfaffl method. I have 3 groups per experiment: 1 control group (calibrator) and 2 treatment groups with 6 to 7 biological repeats per...

19 February 2021 8,351 2 View

XRPD Quantification - Building a calibration curve of drug excipient?

I am aiming to utilise XRPD to quantify a drug excipient within a drug product and have been having a little trouble building the calibration curve to allow for this quantification up until this...

10 February 2021 6,145 3 View

Gain and offset values in Sentinel-2 L1C?

Hello everyone. I have been trying to apply radiometric calibration on Sentinel-2 L1C images (bands 2,3,4 and 8), but every time after layerstacking I come across this error: "Calibration...

28 January 2021 7,160 1 View

How can you confirm new liquid FTIR cell fits calibration?

We have an FTIR instrument which was calibrated in transmission/absorption mode using a set of cells for different ranges of D2O concentration. One of the cells at high range broke and the new one...

16 January 2021 4,791 2 View

Standard addition calibration without blank matrix available?

I have a problem of analytical chemistry. We are working on a spectroscopy technique (FTIR) for the quantification of a mineral phase in complex matrices. We intended to use chemometric techniques...

12 January 2021 7,739 1 View

How does the dilution of matrix-match calibrators impact the ionization in LC-MS/MS?

Greetings. I would like to get opinions from the experts for the improvement and optimization of multiple drug confirmation by LC-MS/MS. 1. One of our method calibration curves follows the...

10 January 2021 9,559 2 View

Do polymers with different chain lengths have UV-Vis absorption peaks at different wavelengths?

I have a sample of mixtures containing polystyrene microspheres (PS-MS) with 3 different diameter sizes (bought from thermo), they all contain a green fluorescent dye inside the polymer matrix /...

06 January 2021 2,218 5 View

How to develop mathematical model for Eye-Gaze tracking system?

Gaze tracking technologies are used in a wide variety of applications. Most gaze tracking systems require a personal calibration process where the user is instructed to gaze at certain points...

03 January 2021 9,675 5 View