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19 January 2021 7,478 3 View

Multiple sequence alignment - polymorphism for restriction digest?

Hi, After comparing multiple (2+) DNA sequences, I want to identify ONLY the restriction sites that changed due to the detected polymorphism. I tried several things by hand, but it's WAY too...

23 September 2020 6,289 4 View

Would you be interested in the special issue "High Temperature Statistical Thermodynamics of Molecules in Gases and Plasmas", Entropy IF=2.494?

https://www.mdpi.com/journal/entropy/special_issues/Gases_and_Plasmas

26 August 2020 9,474 4 View

Can I run a chi-square test when my data include one 'zero' value? Can I run a post hoc analysis after chi-squre when p<0.05?

I have one row of raw data 13, 0, 24, 26, 17 and 14. It is a larval survival rate / six treatments. Can I run chi-squared with zero inluded? I use R, and it looks like it works, but I am not...

24 July 2020 7,720 5 View

How to identify crystals in the shrink cavity?

I have a problem. I watched the crystals on the surface of the shrinking cavity. How to recognize these elements? EDS analysis is not possible due to the depth of the shrink cavity. Machining can...

29 May 2020 4,235 0 View

How to choose the right protein subunit for symmetrical docking?

Recently, I have been dealing with symmetrical docking of protein complexes and I have a problem. Well, I have no problems with docking complexes with cyclic symmetry, it is double-walled symmetry...

09 May 2020 4,424 3 View

How to model a material in Abaqus with 2 types of behavior: high stiffness in compression and low stiffness in tension?

I am modeling a dynamic problem in Abaqus. The material should have two types of properties: different Young's moduli in tension and compression. Any simple way to achieve it? Thanks!

17 February 2020 8,563 2 View

How many water molecules are incorporated into the structure of fructan?

I am looking for help to calculate how many water molecules are incorporated into the structure of fructan. We want to apply polymer density functional theory (DFT) for prediction and description...

01 April 2019 7,096 3 View

No title

I test preference and survival rate of one population (moth larvae). I have six varieties of plants (a-f) in six replicates (36 in total) arranged in Latin square block. I applied 5 larvae (1st...

04 March 2019 5,183 3 View

How to understand "no change in luminescence band" when I can see this change?

26 June 2017 5,786 3 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

How can we limit artifacts caused by rotation in fiber photometry?

We are trying to run fiber photometry experiments for long time scales, but we get these sinusoidal artifacts that come up. We think they may be caused by twisting of the fiber optic subject...

25 February 2021 568 1 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

What is the reason of the received optical signal to be slimmed down in multi-mode fiber?

What is the reason of the received optical signal to be slimmed down in multi-mode fiber? I have 4 km multi-mode fiber

03 February 2021 1,105 10 View

Why it is not permissible to correct all 5 classical optical aberration (spherical, chromatic, coma, astigmatism, curvature of field) simultaneously?

When first order paraxial optics is expanded to third order optics (i.e. sin x~ x-x3/3! instead of sin x~x) , these 5 optical aberrations result in. What is the rigorous mathematical proof that,...

26 January 2021 8,666 4 View

Difference between Second-harmonic generation and Two-photon absorption?

Hello Dear Researchers, I am confused about the Difference between Second-harmonic generation and Two-photon absorption? Can anyone describe the two phenomena briefly in the physical picture? What...

24 January 2021 9,912 5 View

SAR X-Band constellation from Capella Space?

Dear all, I'd like to open here a sort of forum for understanding how the geodesists community is moving in view of the X-band SAR satellite constellation. The new constellation will offer new...

24 January 2021 6,248 0 View

Is it possible that the single-pass absorption exceeds 50%?

Dear researchers It's well-known that the maximum light absorption of any structure can not be greater than 50%. Is it possible that the single-pass absorption exceeds 50%? How?

17 January 2021 2,335 7 View

What can cause laser beam polarisation fluctuations?

Dear colleagues, We have observed large fluctuations in laser power in our setup and traced them down to fluctuations in laser beam polarisation. Attached is a schematic of the relevant part of...

14 January 2021 7,505 4 View