Carboniferous shark teeth - ID help?

Dear everyone! I am looking for some help regarding the identification of two Carboniferous shark teeth from Hungary. See the pic attached. I'd go for Bransonellidae family for A, and Falcatidae...

21 December 2020 1,226 4 View

Hybodontiformes - last survivors?

Hello Everyone, I just ran into the work of Boisvert et al., 2019, in which I found fig. 4.2 a bit confusing. It shows, that Hybodontiformes (pale green) survived till the Miocene, however, as...

13 December 2020 5,180 3 View

How to avoid "rim" or "shoulder" on golden nanobricks produced by EBL?

As seen on the attached image, we intended to produce Au nanobricks by EBL. The resist was PMMA 120 nm, metallization parameters are: Cr 0.5 nm, Au 40 nm. The SEM image of the produced nanobricks...

04 November 2018 2,324 9 View

Can using SEM in a just identified model be still justified?

We are having a mediation model with 2 outcome variables, one mediator and one predictor (exogenious). Based on the literature all of the paths are relevant, therefore we are having a just...

23 October 2018 2,379 3 View

Might HIV/AIDS prevention be too late when the virus already is in the blood stream ?

Early HIV drugs may not stop virus. HIV "reservoirs" may form earlier than expected. (Example of the "Mississippi girl.")

10 January 2018 6,091 14 View

What could be an explanation for UNS S17400 (17-4PH) to have areas of low hardness (measuring about 94 HRB)?

03 January 2016 4,687 2 View

How can I calculate minimal sample size for monitoring?

Hello everyone! I have a question from our mammologist group: they counted the number of anthills destroyed by bears on 89 transects (800 m each). They had a huge SD: 23.06, and the mean of...

17 February 2015 4,709 9 View

How can I build a ringing database in QGIS?

I want to make a QGIS database for my ringing activity. I would like to add my ringing data to ringing place points in a way that more individually ringed birds ringed on a specific location (1...

07 March 2014 1,071 1 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

SDS page software for analysis?

I did sds page to determine the difference in protein expression between 3 types of vaccine , but i don't have scanner or densitometer available. . so i wonder if there is a software to analyze...

02 March 2021 6,270 3 View

Which of the Covid-19 Vaccines would elicit the best immunoprotection and why?

I want to know which of the available Covid-19 Vaccines would elicit the best immunological response and why

02 March 2021 1,388 3 View

Is the sinovac vaccine safe and effective for people over the age of 60 ?

Dear respective researchers, I was asked by my institution to be vaccinated this week using the sinovac vaccine. However, from some of the information I got, this vaccine is not recommended for...

01 March 2021 7,781 6 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 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

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

What is the most common number of epitopes in an multi-epitope Vaccine?

hi everyone, I'm interested in the field of vaccine design specifically multi-epitope cancer vaccines , I want to know if there is a minimum and maximum number of epitopes we could use in a...

27 February 2021 3,882 3 View

If a given country passes mandatory 'vaccine passport rule' to go outdoors, otherwise stay at home, can it help to vaccinate all against COVID-19?

Wether vaccine passport declared not to go out of home without it may help taking COVID-19 vaccine. Can't it break individual's right to protect the community? Your comments on perspectives...

27 February 2021 5,549 23 View

How long do vaccines protect us against COVID 19?

Or will we have to get vaccinated every year, as in the case of influenza?

27 February 2021 1,048 5 View