The Winogradsky column, invented by Sergei Winogradsky, consists in a transparent cylinder for analyzing microbial life by observing how the metabolism of micro-organisms evolve over time in stratified layers. By producing a small closed ecosystem, the column enables observing how bacteria can survive by providing a temporal and spatial visualization of layers such as in ecology, microbiology. Sources: The Microbiome of Your Gut Winogradsky Column—Microbial Evolution in […]
A microtiter plate is an array of chemical test tubes called "wells", invented in 1951 by a Hungarian medical doctor. They are used in a variety of experimental designs, most typically biochemistry assays. The picture above is an example of a colorimetric assay result. Most of the time, they are not directly interpreted visually, as in this example, but are instead put into a plate […]
Can a slime mold solve the traveling salesman problem without a digital computer? From the article's abstract: The plasmodium phase of Physarum polycephalum is a champion amongst living creatures used in laboratory prototypes of future and emergent computing architectures. A wide range of problems from computational geometry and logic can be solved by this cellular slime mold. A typical way to perform a computation with the slime mold […]
Students from New Taipei City collected samples from urban rivers, creeks and ports which they then froze in moulds and preserved in resin. ‘We hope when more people see this they can change their lifestyles,’ said one of the group. Source: Elle Hunt (2017) Popsicles of pollution: ice lollies highlight Taiwan's contaminated waterways.
Tattoos that Change Color When Reacting With Glucose Levels: minimally invasive, injectable dermal biosensors were developed for measuring pH, glucose, and albumin concentrations. Sources: Biotech (2019) Twitter post. Yetisen et al (2019) Dermal Tattoo Biosensors for Colorimetric Metabolite Detection.