How to validate regridding results of environemental data to higher spatial resolution in R?

I am working with several continous, environmental marine datasets at varying original spatial resolutions. My aim is to regrid each dataset to one common, high resolution grid. I am currently...

22 February 2021 2,290 2 View

How to do a Repeated measures analysis with not normal distributed data?

I have results from a listening test in 12 sound environments which are build up out of 3 room properties and 4 occupancy rates. Since the sound samples were often intelligible, subject scores...

04 November 2020 5,423 11 View

Can I use my DNA after the tube was "sterilized" by UV light?

I left tubes with isolated DNA drying (before resuspension) in a biosafety hood for too long and a colleague came and turned on the UV light for some 20-30min. The light did not shine on the DNA...

29 September 2020 536 3 View

How could I avoid mutations upon transforming my gRNAs into the lentiCRISPRv2 vector?

After I have cloned my gRNAs into the lentiCRISPRv2 vector and sent the construct for sequencing, I have noticed that a single mismatch between my clone and original sequence has been introduced....

11 September 2020 4,066 1 View

DNA extraction of swabs stored in ethanol?

Hi all, I am using buccal swabs of seals as a sample source for microsats and mitochondrial sequencing. There is a few samples that were shipped stored in ethanol. , i.e. swab of the buccal area...

08 September 2020 1,013 1 View

How do I interprete the results of a moderation analysis with a categorical and a continuous variable?

Hi all, I have a question concerning a moderation analysis within an experimental setting. The independent variable is categorical and has two options. The moderator is a continuous variable. I...

06 January 2020 9,511 1 View

How to run a binary logistic regression with two experimental treatments?

Hi all, is it possible to run a binary logistic regression within an experiment? That means that the two experimental treatments (treatment 1 vs. control) predict a categorical variable...

03 December 2019 7,319 9 View

What method should I use to freeze the human kidney tissue samples?

Thehuman kidney tissue samples will be used later for immunohistochemistry, ELISA, gene analysis, etc. Should I freeze it in solution or not?

20 June 2019 3,052 3 View

How do THP-1 cells normally look like after PMA treatment?

We just started to culture THP-1 cells and treat them with PMA (100nM) for 72 h. Afterwards we change the media daily as recommended. Does anyone have experiences with serum-free culture in the...

23 October 2017 4,566 1 View

How do I understand the output of my covariate in the Repeated measures ANOVA design?

Dear Leard team, I am currently experiencing some issues with my Master thesis data analysis and I would appreciate your help!!! First I will explain you my study design and then I will explain...

25 April 2017 4,467 3 View

How vaccines of covid 19 work?

Millions ask how vaccines of covid 19 be successful and safe, its here to explain generally how vaccine of pfizer work ,mRNA vaccines teach our cells how to make a protein that will trigger an...

28 February 2021 2,723 4 View

Problem with shRNA transfection. Why are only two plates getting contaminated instead of all?

I transfected my LNCaP-WT cells with 3 shRNA plus their NTC two weeks ago and split two puromycin selected cell plates on Friday last week(Feb 26). I checked for GFP in the cells, and they all...

28 February 2021 4,949 3 View

Best plasmid could be used as a standard curve for AAV titration?

I have been trying to have a good AAV titration for my production and I have tried different plasmids to set up as a standard curve but each one behaves differently. i am trying to use ITR for...

23 February 2021 5,167 3 View

How to control the variants vof covid 19 in second and third waves?

A the world find means to control covid 19 by vaccination ,new variants came to spread and make the world in fear and danger, to understand the conduct of these variants, es constantly change...

21 February 2021 3,080 6 View

Surprisingly low antibody titers against SASRS-COV-2 RBD in hamsters compared to mice?

21 February 2021 6,958 2 View

Will SARS-CoV-2 Spike be broken into S1 and S2 by denaturing conditions?

Hello, I am performing a western blot of my SARS-CoV-2 Spike-pseudotyped lentiviral particles. I denature my virus by adding concentrated virus to 2X Laemmli buffer at 1:1, then boiling for...

17 February 2021 4,844 4 View

How to calculate the TCID50 when the highest CPE is 50% or less?

I am doing TCID50 to measure progeny virus and some treatments protected the cells in a way that the highest CPE observed is 50% or less. How should I do the titre calculation in that case? Thank you!

16 February 2021 8,768 1 View

How to estimate/know plant virus concentration to make a standard curve in ELISA after serial dilution?

Hello, I am trying to know tomato virus titer/concentration in samples and I will perform serial dilution of the positive control. I wanted to ask How to estimate/know plant virus concentration to...

13 February 2021 6,534 4 View

What are the possible effects of COVID -19 Vaccine/s on the persons already recovered from the disease?

Persons recovered from COVID -19 are having antibodies against the virus inside their bodies. They are having T cells already sensitized to the antigens of the virus. If they are vaccinated (may...

12 February 2021 4,106 22 View

What is the reason, we got both test and control band on LFA in negative sample?

I am working on Lateral flow assay for virus detection by carbon conjugated polyclonal antibody. We got a high intense band in both test and control line on LFA in negative sample used as buffer....

11 February 2021 6,558 2 View