Mutation status BRAF and NRAS in RPM-MC melanoma cells?

More Lars Björn Riecken's questions See All

Is there a solution to include right and left censoring in one survial analysis ?

Dear all ! I'm working on historical data related to events and like to carry out a survival analysis. In the dataset there are typically some right censored data, when the individuals are still...

15 May 2023 2,841 2 View

How to fix both serial and cross-section auto correlation in panel date at the same time?

Hi! How do I fix both serial and cross-section auto correlation in panel date at the same time? I run a fixed effects model with PSCE errors (takes care of cross-sectional autocorrelation), and...

12 November 2022 3,190 1 View

DOSY - reliable processing?

While performing DOSY, I noticed something strange that I can't explain: I performed 2 DOSYs of 2 polymers with exactly the same parameters (pulse sequence, small and big delta, temperature, same...

30 August 2022 230 1 View

What statistical method to use to use when you have 3 groups?

I'm in the planing phase of doing a trail for a new therapy treatment for generalized anxiety with 3 groups. A treatment as usual as usual group, and a wait-list control, both serve as a control...

26 June 2022 8,237 5 View

How can i find the risk free rate weekly?

Dear all, I'm working on a Markowitz portfolio on carbon credits. These have not been around for the recommended 30 years. so I changed the data points from monthly to weekly to at least have a...

10 February 2022 9,009 0 View

When to work with aggregated data for a linear regression?

I am trying to do a linear regression with walking speed of pedestrians as the dependent and population size as the independent variable. I have collected the same amount of samples (200) for each...

13 January 2022 3,602 11 View

28 observations for a regression?

I only have 28 observations for a regression, while the minimum is often said to be 30. Is that ok anyway, and are there any extra security measures I can take, such as more stern application of...

07 January 2022 4,359 5 View

How does exogenous variables enter in a panel ARDL model?

Like the title says - where do I put exogenous variables in a panel ARDL model - in the long-run or short-run equation? I want to control for world war one, which means either impulse dummies for...

04 January 2022 348 1 View

Right approach for cointegration when mixing stationary and non-stationary variables in panels?

Hi! I want to mix stationary and non stationary panel data in an error correction and for cointegration. In a non-panel data setting, this is done with ARDL ECM, where a significant EC and...

20 May 2021 1,487 3 View

Why is there no constant in the long-run in panel ARDL (MPG) regression?

Why is there no constant in the long-run in panel ARDL (MPG) regression? It is the same in Eviews and Stata.

20 May 2021 9,371 0 View

Radiogenomics Cancer Research Challenges?

what are the top 3 challenges to the advancement of the field of Radiogenomics in cancer research? is it the availability of easily available low-cost matched imaging and biosamples with clinical...

03 August 2024 5,828 4 View

For a case-control study for Breast Cancer incidents in a particular County in USA, what data can be used as Control? E.g. colorectal cancer?

The County health department is providing Breast cancer incident data. If colorectal cancer cases could be used as control, then we can get respective data from health department as well.

22 July 2024 9,954 4 View

About Machine Learning for Automated Diagnosis of Skin Cancer with Dermoscopy Images ?

Machine Learning for Automated Diagnosis of Skin Cancer with Dermoscopy Images

21 July 2024 5,471 0 View

Fixation Problem with cancer cells?

Hello everyone, I work with polyacrylamide hydrogels, which I fictionalise with sulfo-sanpa and collagen I to then plate lung cancer cells. The problem is that I lose a significant amount of...

19 July 2024 3,906 0 View

Does anyone notice the tumor regression impact of Hepa1-6 cells in HCC orthotopic mice model?

To establish an orthotopic HCC model, C57BL/6 mice (male, 6-8 weeks) were orthotopically implanted with 3x106 Hepa1-6 cells (Over-expressed with a human gene) in 20uL Matrigel into the left lobe...

18 July 2024 9,177 2 View

How to prepare bacterial conditioned media to study the effect of bacterial secretome?

I would like to investigate the effect of bacterial secretome on cancer cells. How do you prepare conditioned media from bacteria?? conditions- time points - media I am looking for the best way...

17 July 2024 3,785 9 View

Contaminant cells in pancreatic cancer patient derived organoids?

Hello everyone, I am cultivating patient derived organoids from pancreatic cancer patients and I saw at the bottom of my domes some "strange" cells other than my usual organoids. I know I should...

15 July 2024 762 3 View

How to prepare alcohol foam with high alcohol content?

Hi everybody, I wonder is there a way to prepare foam from iso-propanol/water mixture? The content of this alcohol should be 70 – 80 w.%. I plan to use silicone-based surfactants, I have several...

15 July 2024 3,539 0 View

How to remove soap formation during transesterification?

Dear all, We've been doing transesterification with our raw materials - a mixture of pairing oil (which is said to came from the skin part of a coconut) and crude coconut oil. During the addition...

14 July 2024 2,200 0 View

Oncologist at Visakhapatnam interested to collaborate?

Calling all medical professionals and researchers! I'm seeking recommendations for an oncologist in Visakhapatnam who can collaborate on my PhD thesis. My research focuses on stage 1 and 2 gastric...

14 July 2024 936 0 View