Air particle test slide results

I volunteer teach 5th grade science and would like a protocol for monitoring the quality of air. How would it be done with foldscope? count particles? measure size? range of particle sizes? numbers with respect to time? The protocol for detecting 2-micron to 40-micron particles on a slide has been recommended by a comercial air…

Spider silk

Spider silk; just a few fundamentals. Nature endowed most spiders (Arachnids) with a complex array of glands to produce several different silk  fibers. Some spiders have up to 7 glands to meet their lifecycle needs. There are generally fibers for trapping food, for making a trapeze on which to spin radial strands, spiral strands, sticky…

silk fabric fiber

brief look at silk Silk was dug up in  8,500 year old Chinese tombs.  In  3630 BC  silk fabric was used at the YangShao Neolithic(5000 BCE -3000 BCE) culture site excavated in 1921 in Henan province.  Silk was rugged and withstood ravages of time due to material properties. We owe the process of making fabric and…

Blood: Red cells, white cell and B-cell on stained slide

To push beyond the foldscope-eye limits  try to team it with a high definition smart phone.     A RBC is shaped like a mint lifesaver. The outer edge is thicker than the middle. When viewing with the smart phone zoom in to reveal the 2-micron edge. The normal RBC can be distinguished from an abnormal…

Apis Melifera

my first post, please comment…Ken brown I raise honeybees. Occasionally get stung. If you wonder what a stinger looks like Barbs keep the bee from leaving until the bee abdomen tears free. Muscles alternately move the two barbed stinger lancets further into the skin and compress the venom sack to  push venom down the canal…