Reaction of vinegar and baking soda [video]

Low mag Some baking soda was placed on a glass slide and covered with a cover glass, then a dropper was used to place some vinegar on the slide. The vinegar was sucked under the cover glass by capillary action and reacted with the backing soda.

Egg Yolk

This is a bit of egg yolk from a fried egg I had for breakfast.  

Toothpaste – hydrated silica

This is toothpaste – (Sensodyne ProNamel) It contains water, sorbitol, hydrated silica, glycerin, PEG-8, cocamidopropyl betaine, flavor, titanium dioxide, xantham gum, sodium saccharin, sodium hydroxide, according to the package.  I’m guessing just the silica is showing here, but there might be other particles like the titanium.  Why do they put titanium in toothpaste?  That’s another…

Salt crystals growing and dissolving!

I saw Manu’s recent video showing snowflakes (ice crystals) melting to form water. I thought I’d try something similar with salt crystals, which slowly dissolve and re-form when placed in water containing a high concentration of dissolved salt: https://www.youtube.com/watch?v=-bjJVQ5kVRY&feature=youtu.be https://www.youtube.com/watch?v=wwSoW3LIg6E All videos shown at 120x actual speed. I made a super-saturated salt solution by pouring two…

Crystallizing Urea

Here are some shots from my first attempt at crystallizing urea and viewing them in the foldscope. I started out by taking a few grams of pure Urea pellets in the lab and dissolving them in about 500uL of water. I put only 20uL of solution onto a glass slide, and then waited a few…

Combating counterfeit medications with the foldscope?

Microscopes are not normally used by pharmacists, but could inexpensive, readily available microscopes be useful to pharmacists?  Perhaps inexpensive microscopes could help pharmacists identify counterfeit medications, especially in developing countries where drug products are not well regulated. To begin addressing these questions, one can ask whether the foldscope may be useful to obtain information about the composition of OTC medications, such as Motrin IB tablets (A). Such tablets are…

Whole Blood EDTA

  I am a phlebotomist in a laboratory where my duties include venipuncture, specimen handling, and processing. During the verification process I used a drop of blood collected in an EDTA tube. Ethylenediaminetetraacetic Acid, or EDTA is an aminopolycarboxylic acid used as an anticoagulant in evacuated tubes. It inhibits the clotting process by removing calcium…

What can we learn from microbes?

Believe it or not, life does not end where our vision does. In fact, life goes deeper and gets smaller than one could ever imagine! A single drop of water has innumerable unique, diverse, creepy, yet amazing organisms. When we look at a drop of water, we do not see the tiny life forms within,…