Psyllium husk is used to increase dietary fibre. Met analyses show it is of benefit for irritable bowel syndrome and decreasing LDL cholesterol. It is also of benefit in improving blood sugar control in type 2 diabetes mellitus.. Here are some images showing psyllium husk with polarized light, plane polarized light and a short video…
Often seen as pests, wasps have an important role in pollination (especially figs) and can be used for biocontrol. Social wasps make their paper-like nests out of broken down pieces of wood and other material. Here I have the images of a nest with plane and cross-polarized light.
This is the same image as previous, but with polarizers.CayenneFoldscopeMOV This is a short video clip. The music in the background is by the Red Hot Chilli Peppers.
This image is taken with oblique illumination, giving a dark field effect.
CottonGrassFoldscope’ The tufts of this sub-arctic plant have been used for wicks in lamps. Here are some pictures of the tufts under the Foldscope.
This tiny granule is from Silfra Iceland, where the North American and Eurasia plates are slowly moving apart. I used polarizing lenses and the adhesive coverslip which came with the Foldscope that ended up acting like a compensator plate. I was struck by how smooth the granule (probably volcanic basalt) was and the colors produced…
Inspired by others in the microcosmos, I too looked at turmeric and made a little clip with polarizers. It appears as though the pigmented material is localized in certain areas.
For a few pennies, I was able to get some Epsom salts. I added water and let it dry on the slide and then viewed with polarizing filters. Magnesium sulfate is used medically for certain cardiac rhythm problems (Torsades des points), severe asthma, and in certain cases to protect baby when mother enters labor early….
Magnesium sulfate is used medically for certain cardiac rhythm problems (Torsades des points), severe asthma, and in certain cases to protect baby when mother enters labor early. It is also called Epsom salts and used for soaking and skin healing.
For a few pennies, I was able to get some Magnesium sulphate. I mixed in water and allowed it to dry on the slide. I thought it had dried, but when I looked at the clip I realized there was a drop of water (at about 7 seconds into the clip) at the top of…
Monosodium glutamate (MSG) is responsible for the umami or “savoury” taste of many of our foods. I was able to buy a tiny amount at a bulk food store for only a few pennies….can’t recall the last time I bought something so interesting for only a few pennies!
Raw Honey often contains pollen and tiny bits of beeswax. I think the structure at about 4 o’clock maybe wax, but am not sure if I can say so confidently. As you watch the clip under polarized light, you can see the sugar (primarily glucose and fructose) crystals shimmering. Ambient room temperature is quite high…
Here you can see the crystalline structure of sugars better.
Here is a short clip of the Methotrexate crystals under polarizing filters. Methotrexate was one of the first chemotherapeutic agents (and still used), and was discovered by Yellapragada Subbarao, who also had major contributions in elucidating the role of ATP and earliest antibiotics.
The first image shows crystals of methotrexate under plane polarized light. The vial containing them was to be discarded as it had expired 9 months prior. The second image is the same image with slightly higher magnification and under plane polarized light.
Here is a short polarized film of potash which contains a number of potassium compounds. You can see the birefringent potassium nitrate crystals.
Here is Potash with polarized light and you can see the birefringent KNO3.
For this, I mixed regular table sugar with tap water and let it air dry. Then observed this at the edge.
I put a drop of a Hyaluronic acid solution on the slide. I didn’t see anything with brightfield/polarizing microscopy. I looked at it again 2 days after it had dried, with one polarizing filter, then both and finally with polarizing filters and a “frugal” compensator (the coverslide in our Foldscope kits).