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

Doing an ANOVA with one DV and 11 factors and not getting any interaction results. Am I running the wrong test?

Trying to discover the interaction of 11 beliefs (IV) and how those influence acceptance mean scores (DV) and which combination are most influential when found together.

26 November 2020 6,571 9 View

In qRT-PCR experiments, does the primer concentration affect the primer efficiency?

I plan on using the Pfaffl relative quantification method to check for changes in gene expression and determined primer efficiencies (using a standard curve of cDNA dilutions) with 500 nM primer...

23 July 2020 803 6 View

Protease activity assay?

Hello, I would like to get help! I want to measure the protease activity of pancrease powder. I prepared 10mg/ml stock solution from the pancrease powder and I used 100ul from that and I added...

22 June 2020 1,609 3 View

ANCOVA: When group differences emerge in variable X but age is a significant covariate, how do you interpret the Results?

Is age a moderator in this case? How do you examine its effect (i.e. higher or lower age is impacting the DV?)? Partial correlation? Other?

05 February 2020 2,193 3 View

Why are triple base propellants not used in small arms such as assault rifles?

I would think that the use of triple base propellants in hand-held weapons, such as assault rifles or pistols, would be greatly beneficial as its use would remove the muzzle flash. Also, it would...

26 November 2018 4,079 1 View

Does transposable elements in humans carry human genes?

In case of humans does any transposon type move genes that code for such human proteins that have functions? I've read at several sources that they transcribe the proteins needed for the...

14 September 2018 2,698 4 View

How you solve a problem/task like cooking a pizza or exit a room etc.? How you know what is the next step which is lead to the solution?

How do you know that from the almost infinite action (toolbox), which action you need to choose (which is A , B etc..) to get the next step within the progress toward the target. (Starting point...

30 July 2018 2,763 8 View

How can one calculate the radiative reaction of a dipole for stimulated emission (when the radiation field isn't empty)?

The recoil force of radiation is known for spontaneous emission (for the radiation of an accelerating charge or dipole), when the photon field is empty. Is there any difference when stimulated...

26 June 2018 9,813 6 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

Could any one guide me, to write research proposal for grant? ?

We have one plant, the local people using this for controlling blood sugar, the toxicity and antidiabetic activity of the plant is not reported yet, please guide from whag should be the process ?...

02 March 2021 2,300 1 View

Is there any rich, publicly available English literary corpus?

Hi everyone. I am looking for a rich corpus in English literature, a one which includes literary prose ( e.g., novels or short stories) . can anyone propose a good one? Best regards Fatemeh

01 March 2021 1,970 2 View

No title

01 March 2021 3,905 5 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View