Are infrared distance meters capable of detecting distances in terms of micrometers?

Absorption coefficient of methane?

Hello, Can anyone provide me with the absorption coefficient of methane gas at 7.7 um? Any reference?

06 August 2024 980 5 View

How does one derive the standard deviation of a scale?

Dear all, I am working on analyzing data from a survey on student satisfaction. The survey contains items with a 7-point Likert response format that produce 12 scales related to different areas...

05 August 2024 2,141 4 View

Why results of ROS flurescence are negative as there was no bacteria within?

Hello. I am working on ROS production of two systems: system A is cerium oxide and hydrogen peroxide, system B is cerium oxide nanoparticle, hydrogen peroxide and potassium bromide. I did some...

04 August 2024 5,974 3 View

Repeated measures ANOVA, ANCOVA or Regression?

Would anyone be able to advise me... I have an RCT with a control and experimental group. Participants were recruited from one school (n=59). Participants were assessed using repeated measures on...

04 August 2024 4,040 6 View

Why specific capacitance is not proportional with the specific surface area?

Dear researchers, Why specific capacitance is not proportional to the specific surface area? I have material A with a surface area higher than material B, but material B is showing little bit...

26 July 2024 9,156 2 View

Non-parametric version of the wo-way repeated measures ANOVA?

Hi, can someone please help me with their expertise. To analyse a dataset with 2 IV´s (2 levels each) and 1 DV (time - measured at 4 points, i. e. 4 DV?) I found the two-way repeated measures...

24 July 2024 3,284 6 View

How to determine method detection limit in an analytical method?

I know the difference between instrumental LOD and method LOD but my query is - in case of any sample whose concentration is zero or not detected by the instrumental LOD, is it possible to get...

24 July 2024 6,592 5 View

Can I use CCCP instead of H₂O₂ as a positive control for ROS measurement through flow cytometry?

I am giving starvation stress to the soil amoeba (Dictyostelium discoideum) cells in my study groups and using NAC as a negative control. I am using DHE for ROS measurement.

20 July 2024 6,354 0 View

How to determine LOD values?

I am performing fluorescence experiments using a ligand to detect metal ions. I want to determine the Lowest Detection Limit (LOD) using the formula LOD = 3σ / K. However, I'm uncertain about...

19 July 2024 1,086 1 View

Can any of you suggest how to find the detection limit.?

I am working on flourescence sensing of heavy metals using quantum dots.Can any of you suggest how to find the detection limit. Whether it is calculated from formula or we can get from instrument?

19 July 2024 7,411 3 View

Leonid V Vladimirov

I guess it should depend on a distance to be measured - like an accuracy of a rifle with a riflescope.

Alessio Scalisi

I need to measure very small changes of distances over time. Let's say I have an IR sensor 2 cm apart from an object. The object swells and shrinks over time. Can I estimate changes in distances in micrometers?