Does anyone have a copy of the sTOFHLA?

Peppercorn books is out of business, and that the creator of the test has been dead for over 5 years. I am looking to use this tool to assess literacy in community dwelling seniors as part of my...

25 January 2021 4,061 2 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

Robot that helps clean our seas of microplastics?

My team and I are curently working on a project is focused on preventing microplastics and collecting plastic particles up to 2 * 2mm. Our biggest concern is harming sea life and destroying...

29 November 2020 9,240 5 View

Psychological theories about why we get affected by social media?

Hello, I'm in need of a theory on why we get affected easily by social media, and why it influences us at this day and age. Any help would be greatly appreciated. Thank you.

24 November 2019 2,795 3 View

Using the RCAS system, would the p19 gag protein be expressed? That is, would an antibody against p19 gag label the transvected cells?

09 February 2015 7,055 1 View

Why do I get a pink pellet during RNA extraction after isopropanol precipitation and centrifugation?

15 October 2014 7,314 6 View

What do you think about the use of bootstrap tests in phylogenetic analyzes?

Following several years searching for good phylogenetic hypotheses I'm convinced that bootstrap is not a good test for phylogenetic trees. Instead, I prefer to compute the posterior probability...

18 December 2012 5,893 8 View

Robot that helps clean our seas of microplastics

My team and I are curently working on a project is focused on preventing microplastics and collecting plastic particles up to 2 * 2mm. Our biggest concern is harming sea life and destroying...

01 January 1970 8,401 3 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

How to get/count refractive index in gasses?

20 February 2021 8,202 6 View

Having 2 different substrates under the same deposit conditions (TiN coating) why it is possible to obtain different colours in the 2 dif substrates?

Coating is made by same deposit conditions. substrates are HSS Drill bit and Shim SS 300 series. On the drill bit we are getting some golden color, however on the shim we got no color it is like...

08 February 2021 9,383 7 View

How to make Fast Green FCF from powder?

Hi everyone We need Fast Green to electroporate plasmid into mice embryos, therefore we simply need it to see some color in the liquid we are electroporating so that electroporation is more...

07 February 2021 1,671 2 View

Which is the best software for the simulation of tribological properties of materials?

I want to simulate the tribological properties of solids, liquids, and fluids, please suggest good software.

02 February 2021 3,947 3 View

Does anybody work with CoolLED in fluorescence microscopy?

I have trouble with exciting wavelengths higher than 460 nm while e.g. ex with 405 nm works. Filtercubes are correc, as I used them with my old xenon lamp before... I work on axiovert200M and with...

25 January 2021 5,201 2 View

How to prepare a liquid sample for FTIR spectrum?

I have a ethanol-water 50% extract of mango peel. I purified mangiferin from the extract with filtration and precipitation. so i obtained a low concentrated extract which i want to se the IR...

24 January 2021 8,880 7 View

Why high voltage and current (and some gases) Cause Spray-mode metal transfer in Gas-Metal Arc Welding (GMAW)?

This transition phenomena of Globular to spray mode as voltage , and especially current is raised, is very commonly known to Manual Metal Arc Welding (MMAW) and Gas-Metal Arc Welding (GMAW)...

20 January 2021 7,984 2 View

Can you have pressure inlet and velocity inlet at the same time?

I was reading a reference (Reitz-A Photographic Study of Flash Boiling Atomization). In his experiment, his boundary condition is delta p and constant velocity. The liquid injection pressure was...

18 January 2021 842 9 View

How can you confirm new liquid FTIR cell fits calibration?

We have an FTIR instrument which was calibrated in transmission/absorption mode using a set of cells for different ranges of D2O concentration. One of the cells at high range broke and the new one...

16 January 2021 4,791 2 View