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" ... Change-makers may be outnumbered, but this too is changing. Peesapaty is not alone; Ari Jónsson in Iceland was motivated from a Japanese discovery to create a green alternative to plastic this year, too. He invented biodegradable algae water bottles using powdered agar with water. Agar is a substance that dates to the 1650s when a Japanese innkeeper tossed out extra soup and saw it gel together. The agar-water mixture forms a gelatinous substance that can be heated then frozen into a mould hard enough to contain water but soluble to break-down once emptied. ... "
" ... He first isolated cultures of bacteria on potato slices, then became one of the first to adopt the Petri dish (today's Google Doodle includes images of both). Koch also pioneered the use of agar, which is still the medium used for most bacterial cultures today, over a century later. Without his work, we couldn't study how bacteria grow, how to fight them, or what potentially useful chemicals they produce. ... "
" ... Minibrains are small clusters of human brain cells that can be grown in a Petri dish. Floating through the agar, these small gray lumps don’t look particularly impressive, but they are allowing scientists to study actual living human brain tissue in ways they couldn’t before. ... "
" ... Pictured here are colonies of multi-resistant E. coli possessing the ESBL (extended spectrum... [+] beta-lactamases) gene growing on a blood agar culture plate. (Photo: Getty Images) ... "
" ... Pour Granny Smith apple juice in a pot. Add agar agar powder to apple juice, whisking constantly. Place pot over medium heat and bring to a boil, whisking. Boil for one minute, then pull off heat. Let juice cool slightly then add gelatin. Pour juice through a chinois strainer into a plastic-lined sheet tray. Let set in cooler for at least 6 hours, or until firm. Carefully cut gelée into medium-sized cubes. Place in container and hold in cooler. ... "