How to compare individual spectra of a scan to a mean of the whole scan?

I'm doing a project, where I scan over a sample recording a spectrum at each position. Although the sample is supposed uniform, there's a large difference in the overall spectral response of each...

13 July 2020 2,077 3 View

What is your experience on practicioning as opposed to doing academic research?

Lately, I have been thinking much about the relationship between working practical tasks, on the one hand, and doing scientific research, on the other. What is your experience..? Most...

01 August 2019 4,989 4 View

How do I measure the major axis (longest axis) of an object in a nifti segmentation file?

Hi! I need to measure the maximum length of a random shaped object in a 3D binary segmented nifti volume. Is there any toolbox or any easy approach in Matlab or Python? Thanks in advance! Thorsten

05 July 2018 2,754 1 View

Do the bands of a photonic crystal (or semiconductor) ever cross?

Do the bands of a photonic crystal (or semiconductor) ever cross? If not, why not? If so, is there any special physical phenomenon that occurs at the crossing? And...if two bands cross, how do...

27 February 2018 461 3 View

Periodic Table of Metamaterials?

22 May 2017 3,419 4 View

What is typically the acceptable bend loss in integrated optical waveguides?

I am working with a team to explore some new concepts for integrated optical waveguides that may significantly improve bend loss and coupling into and out of the waveguides. We are looking most...

09 December 2015 3,880 4 View

Under which conditions are Mie Scattering Amplitudes imaginary?

Hi, I am using Maetzlers Mie Scattering Script from 2002 to calculate Phase Matrix entries. But under no conditions I am able to produce imaginary scattering amplitudes S1 and S2 which is kind of...

11 November 2015 3,806 4 View

Anyone familiar with VHL immunohistochemistry on murine sections?

We are looking for an antibody that can detect murine VHL (von Hippel-Lindau) via immunohistochemistry, preferably on FFPE sections. Many thanks and best wishes! Thorsten

03 September 2015 9,737 3 View

What is the correct terminology for the following two learning phenomena?

What is the phenomena called when a student or pupil can learn better because he or she can associate the new knowledge with something previously known? And: What is the phenomena called when a...

05 February 2014 3,043 8 View

Metric Modeling and Representation of 4D Data through 3D Vector Tensoring

01 January 1970 691 2 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

Is there any one who can provide a donation of HPV detection and genotyping kits in exchange collaboration fors?

Warm greetings My name is Ayichew S. and I am doing my Ph.D. in Medical Microbiology (on Human papillomavirus). At this stage, I have almost completed a clinical sample Cervical swabs)...

25 February 2021 1,660 3 View

Is there any one who can provide a donation of HPV detection and genotyping kits in exchange collaboration forms?

Warm greetings! My name is Ayichew S. and I am doing my Ph.D. in Medical Microbiology focusing on Human papillomavirus). At this stage, I have almost completed a clinical sample (Cervical swabs)...

25 February 2021 3,612 3 View

What urea buffer can i use for biotagged protein extraction from streptavidin beads?

Hi all, I have been doing research on biotagged LDB1 proteins in Mel cells. I purify the proteins using M280 streptavidin beads. The yield is very low so I've been trying to optimize it by...

24 February 2021 5,749 3 View

What is the biochemistry of acidic solvents for phenolics extraction in strawberry?

I am using the Folin-Ciocalteu method for analysis of total phenolic content in ripe strawberries. I've read several protocol that suggest a methanol/H2O/formic acid (80:19:1) extraction solution....

22 February 2021 6,560 3 View

Protocol for membrane extraction E. coli?

Hello! I am interested in determining whether a poly-unsaturated fatty acid I have engineered E. coli to produce is being incorporated into the membrane of the cells or if it is simply a free...

21 February 2021 7,447 2 View

Using 1D CNN for pixel classification in an image?

I have a 3D Image of size 100x100x100. I have features (feature dimension 25) extracted for each pixel by considering a small pacth around it. So the input to 1D CNN is 100x100x100x25 reshaped to...

17 February 2021 941 4 View

Solid Phase Extraction of drug product containing nanoparticles ?

Hi Everyone, I am trying to develop an SPE method for the vaccine which contains Matrix-M (saponin Quillaja Saponaria ) which is in nano-particle form and size is around 40nm. These nanoparticles...

16 February 2021 1,389 2 View

Does anyone know what are the pros and cons for using autoencoders instead of CNNs for features extraction in neural networks?

Are there papers that talk about the possible advantages and disadvantages of using autoencoders instead of CNNs for feature extraction in neural network?

15 February 2021 6,952 3 View

Acid phenol:chloroform (25:24:1) for RNA extraction instead of (125:24:1)?

Hi everyone! I am about to extract RNA for RNA sequencing assays and my Invitrogen kit/protocol...

14 February 2021 1,755 3 View