Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

Can two EC50 values with different hill slopes be compared?

Hello, I fit a classical dose response curve Y=Bottom + (Top-Bottom)/(1+10^((LogEC-X)*HillSlope)) to my data (not related to inhibitors etc). The model I use is purely qualitative but it fits...

23 February 2021 8,155 5 View

Why is my protein not binding to my reversed-phase column?

Hello everyone! Short facts: I am trying to perform reversed-phase chromatography via a desalting column (Waters: Sep-Pak tC18 3cc) of an already purified hydrophobic protein to exchange the...

01 February 2021 5,471 15 View

Metabolomics Data Normalisation?

Hello, Setting: We have a rather large dataset consisting of somewhat 500 samples containing metabolomics data. The data was obtained by analysing dry capillary blood using HPLC methods, yielding...

04 January 2021 8,773 5 View

How does PEG lower the evaporation rate of water?

04 November 2020 4,643 6 View

Does the rate of water condensation depend on vapor pressure?

25 October 2020 5,108 3 View

Why does surface roughness enhance (super)hydrophobicity?

Hello, according to Wenzel's model, an increase in surface roughness will also increase the contact angle, but what is the thermodynamic reason for it? Considering the lotus effect, does a...

22 October 2020 9,004 8 View

Nonlinear fit to median instead of mean values?

Hello, my question might be more theoretical. The datasets I currently analyse are not normally distributed (according to shapiro-wilk and kolgomorov-smirnov @ p = 0.05). Therefore, I prefer...

24 September 2020 6,473 8 View

Initialization of Simulink Model in the course of an optimization loop gets slower?

I am performing an optimization, where in a Simulink Model (involving Matlab function blocks and discrete event blocks amongst other typical blocks) block parameters are changes by an optimization...

17 August 2020 4,904 4 View

Can maximum metabolic rate and Specific dynamic action coefficient be measured at the same time?

We are conducting a respirometer trial with salmonids and want to access SDA variables in relation to temperature. We are wondering, if we can measure the Maximum metabolic rate (MMR) and the...

12 May 2020 4,286 1 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View

Where can I find atmospheric measurement profiles (temperature, density, etc.) between 300-800 km altitude?

I am investigating thermospheric mass density profiles between 300-800 km altitude. I would like to compare the variability with other parameters, including temperature, electron content,...

01 March 2021 5,902 3 View

Trouble with Charting with Google Earth Engine (Technical)?

Hello. I have a problem with the charting in google earth engine. I created an image collection by combining 5 image collections of five parameters and using ee.Join.inner ( ) and .apply ( )...

26 February 2021 7,084 2 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

Suggest me some trending topics for phd research in text mining/AI/machine learning?

My master's research is in info retrieval and text mining. I would be grateful if you could help me to select a good topic for my phd research proposal.

24 February 2021 393 14 View

Satellite orbit estimation using Recurrent Neural Network - what should I use?

Hello, I am a master's student studying in Yonsei Univeristy, Korea. I am trying to estimate the state of satellite, using Neural Network. Below is a simple flow of my study. 1. Train (t0 ~ t1)...

23 February 2021 6,383 3 View

How to use Remote sensing and GIS applications for mapping the available medicinal plants within the locality/municipality?

Hello, I'm very interested in mapping and managing the conservation of the Philippine traditional medicinal plants, in which I think is very helpful in the field of medicine for further analysis...

21 February 2021 374 5 View

How to discriminate between Sentinel-2 Level-2A Product Discriminators?

According to the Sentinel-2 user guide here (https://sentinel.esa.int/web/sentinel/user-guides/sentinel-2-msi/naming-convention), the compact naming convention is arranged as...

21 February 2021 5,919 9 View

Does qualitative research using closed and open ended survey and semi structured interviews qualify as triangulation?

I am using qualitative research to look at employee motivation. I will use a closed and open ended survey (for biodata information and general views to motivation) and semi structured interviews...

18 February 2021 436 11 View