Does anyone knows existing online databases on marine mammal observations in the Antarctic and Sub-Antarctic waters from research and tourist vessels?

More Vladimir Laptikhovsky's questions See All

How can I edit suggested publications?

Hi there! I regularly receive suggestion about papers and authors that are totally out of my area. Does anybody know how I can fix this? Thank you!

01 March 2021 9,574 4 View

PUC19 as a transfer plasmid for lentiviral delivery?

Hello, Is it possible to use pUC19 as a transfer vector to be packed in using the second generation viral particles packaging system( pMD2.G; psPAX2 plasmids)? As far as I understand it there is...

28 February 2021 4,868 2 View

Cox regression baseline hazard?

Dear colleagues, I would like to make a mathematical equation of Cox regression model, however I am stuck with baseline hazard. I clearly understand interpretation of coefficients, but I can't...

24 February 2021 6,207 3 View

How to calculate the electric field in the rotating frame (the question in the general relativity)?

In the classical electrodynamics, there is one problem - to find the EM fields created by the charge moving with the constant velocity in the circular orbit or in the helical path (free electrons...

12 January 2021 3,689 1 View

Do you know anything about Elena Bokus, the early 20th Century Architect / Architectural Designer?

The available research of early 20th century history of architecture in North Macedonia, suggests that probably the first female architect / architectural designer was Elena Bokus (born in 1893...

23 December 2020 2,039 2 View

Can you recommend a short and free Deep Learning course that is sufficient to enable implementation on Java?

It would be best if the material is available on the web, a pdf version is also possible. If you still have knowledge of a good video course, please share.

29 November 2020 4,769 2 View

Why the Helmholtz decomposition theorem is not applicable to the electrodynamics?

My question is caused by one curious fact of the electrodynamics. It is commonly accepted opinion that the electromagnetic fields can at least formally be decomposed onto the rotational and...

10 September 2020 8,668 3 View

COS7 cell transfection - do you have a good protocol?

Dear all, lately we ran into trouble with COS7 cell transfection, we get low transfection rate with the protocol we use. Do you have a good transfection protocol? Preferably Calcium transfection...

23 May 2020 842 2 View

Can an electron and a hole have one common coordinate y_0 of the center of the quantum orbit in a two-dimensional semiconductor in a magnetic field?

Can an electron and a hole have one common coordinate y_0 of the center of the quantum orbit in a two-dimensional semiconductor in a magnetic field? (if they have the same or opposite directions...

16 January 2020 5,009 8 View

What is the density of excitons on a two-dimensional semiconductor in an external magnetic (and without magnetic) field?

What is the average density of excitons on a two-dimensional semiconductor in an external magnetic (and without magnetic) field? What is the dependence of this density on the magnetic field B?

12 January 2020 173 2 View

How to consider effects of rapid warm adaptation in modeling of ecological impacts of warming?

I would highly appreciate it if my fellow ecologists (biologists) provide their opinion on the thoughts below [esp., shortly tell us which path may be more effective, if they know another way, if...

15 February 2021 3,642 6 View

What is the correct common name for Hydrochoerus hydrochaeris?

There are two extant species of Hydrochoerus: Hydrochoerus isthmius, the lesser or Panamanian capybara, and the genotype species H. hydrochaeris. The latter is the more common species of capybara,...

11 February 2021 3,494 14 View

Which software to use to statistically analyze Telomere Length_TRF_Southern Blot?

I am trying to measure telomere length in an ant species using the TRF method, which is a Southern blot technique. Currently, I am struggling with analyzing the images and would appreciate any...

29 January 2021 604 3 View

Is there an alternative to PGLS that considers phylogenetic signal when calculating the estimated value?

I have been working on a study trying to estimate body mass in mammals using a skeletal proxy in R. My dataset has high phylogenetic signal (Pagel's Lambda = 0.9) and I am interested in removing...

26 January 2021 6,997 3 View

Should I add a promoter upstream of my CRISPR-inserted gene?

Hello, I want to insert a gene into my cells using sgRNA, Cas9, and an HDR template. The gene that I will insert into has its own promoter. Because I will cut the gene downstream of its start...

14 January 2021 1,170 2 View

What are the insilico tools available to recognize transcription binding sites on a promoter ?

I have to control the expression of a gene ( in vitro ). For designing an optimal promoter assay, I would like to know more about Transcription factor binding region, enhancer and repressor...

11 January 2021 7,992 3 View

Is there any relevant technique for mesocosm studies in marine environment using Nanoparticles?

I am planning to perform mesocosm study in simulated marine environment using Phosphorus based nanoparticles, i would be using marine micro-organisms in it. kindly suggest me some effective...

07 January 2021 5,877 3 View

Why negative controls also showing the specific bands of promotor and other regions (GUS, GFP etc.)?

Dear Researchers, I did a transformation of an empty vector (pCAMBIA1301/1302) into my passion fruit plants, for the optimization of the transformation protocol. After transformation; DNA...

06 January 2021 8,465 99 View

How does titanium dioxide (TiO2) as a coating's component enhance the coating performance in terms of anticorrosion??

Greetings, Recently, I was asked by a researcher how does TiO2 enhance the coatings polymeric structure making it able to reduce corrosion reaction by preventing the penetration of aggressive...

02 January 2021 5,257 5 View

Is there any chemical safe for sea environment, but could be used for repelling planktons and microorganisms?

As an example of Julia Child, whose first receipe was shark repelent, my team and I are looking for some chemicals which wont harm planktons but will help keep planktons from our robot in sea.

20 December 2020 9,616 4 View

Patricia Capllonch

Estimado Vladimir. El Instituto Antartico Argentino hace censos de mamiferos y aves todos los años desde un buque rompehielos cientifico. Puedes escribirles o tratare hoy de mandarte trabajos

Vladimir, I send you the Bachelor's Thesis of Juan Cruz González from the National University of Tucumán, Argentina, I'm already looking for online information on Antarctic mammals

Abhijit Mitra

just trying to get