Polarized light foldscopy

I finally got myself a polarizing film. By this I can now polarize the light falling on the sample by placing the film between the light source and the sample and further by placing another film between the lens and the eye/camera I can block the same polarized light so that only light whose polarization…

Minerals with Cross-Polarized Light

Using some minerals samples that we had lying around at work and low budget tools (my fingernail to scrape off pieces of the minerals), I looked at crystal structures with a cross-polarized light Foldscope (see this post for instructions). First, some muscovite mica which forms in very thin sheets and has high birefringence (which is what…

Raw Honey – polarizing light clip

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…

Polarized Explorations Part 3!! Copepods and Ciliates

Hello everyone! Thanks to iGEM I’ve had absolutely no time for foldscoping lately 🙁 but I’m determined to exploit this mini vacation in Ratngiri to its fullest 😀 Till now I’ve observed some pure chemicals and fruits in cross polars but this time I’ve tried doing something that I’ve been dying to try my hands…

Polarized explorations part 2

Hello everyone, There are going to be tons of pics in this post so I better limit the words. I have foldscoped 3 compounds here – Citric acid , L-cysteine and Potassium dichromate. Recrystallized Citric acid Just while I was foldscoping these citric acid crystals an orange caught my attention! I thought Why not try…

Cross Polarized Foldscopy!

Hello Everyone! I’ve been dying to try out some polarization foldscopy!! and finally the wait is over! Just last to last week Laks Sir sent me some polarizing filters! I’d been collecting compounds from our Chemistry department and waiting eagerly for the filters to arrive. Here are the first few pictures I took using the cross…

Psyllium husk (Ispaghula)

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…

Wasp nest

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.

Raw Honey (Unpasteurized)

Raw Honey plane polarized light.  You can see some of the crystalline structure of the sugars here.  

Potash

Here is Potash with polarized light and you can see the birefringent KNO3.

Experiments with Cross Polarization and Fibers

In the published papers, it’s clear that a variety of flavors of the Foldscope are being developed to allow for specialized lighting or contrast-enhancement. Some will require additional components, but one in particular seems accessible and easy to adapt the “vanilla” brightfield Foldscope. Polarized light microscopy is attainable by introducing two, perpendicularly oriented polarizing filters…

Learning by watching: Explorations at the cellular scale and beyond

Learning by watching: Explorations at the cellular scale and beyond (Aprendiendo al observar: Exploraciones en la escala celular y mas alla) Last week the inaugural version of Clubes de Ciencia Colombia event took place in Bogota and Medellin. The idea behind this program is to bring graduate students in the US back to Colombia to…

March of the crystals

Inspired by the series of posts from the “frozen project” by a 6-year old and mom; I brought out my Vitamin C crystal bottle again. See Frozen project series here: http://microcosmos.foldscope.com/2015/05/20/the-frozen-project-the-conclusion/ @Laks and I have previously posted extensively on Vitamin C crystallization and also it’s biological implications [see post here] Now it was time for…

Fruit fly and wing

On the iPod, the light module can be too bright to get some images. I took two LCD (liquid crystal display) polarized filters from a broken handheld game I took apart and inserted them between the light module and slide (one filter rotated 90 degrees to the other) this reduced the light from the light…