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Different colors of bromothymol blue at marked pH conditions. Bromothymol blue may be used for observing photosynthetic activities, or as a respiratory indicator (turns yellow as CO 2 is added). [7] [8] A common demonstration of BTB's pH indicator properties involves exhaling through a tube into a neutral solution of BTB.
Elodea is a genus of eight species of aquatic plants often called the waterweeds described as a genus in 1803. Classified in the frog's-bit family ( Hydrocharitaceae ), Elodea is native to the Americas [ 1 ] and is also widely used as aquarium vegetation and laboratory demonstrations of cellular activities.
The photosynthetic efficiency (i.e. oxygenic photosynthesis efficiency) is the fraction of light energy converted into chemical energy during photosynthesis in green plants and algae. Photosynthesis can be described by the simplified chemical reaction 6 H 2 O + 6 CO 2 + energy → C 6 H 12 O 6 + 6 O 2
Bromothymol blue is the indicator used in the agar, it changes to yellow in case of acid production during fermentation of lactose or changes to deep blue in case of alkalinization. Lactose-positive bacteria build yellow colonies. Bacteria which decarboxylate L-cystine cause an alkaline reaction and build deep blue colonies. [1]
The Sigma-Aldrich catalog lists the pKa value of 7.10 as approximate. (The quoted description from the online catalog is: Bromothymol Blue (BTB) is a pH indicator (pKa approx. 7.1) that is used as a biological slide vital stain to define cell walls or nuclei under the microscope.
Shelby Dozier, a 34-year-old former USPS worker, admitted to stealing over $100,000 worth of sports memorabilia from September 2022 to December 2022.
According to Pinterest’s 2025 Predictions report, searches for “nesting party” are up 205% and “nesting party ideas” are up 105%. Gina Jokilehto, ...
Blue-Ringed Octopus. The blue-ringed octopus carries Tetrodotoxin, a neurotoxin just like pufferfish. However, the Blue-Ringed octopus contains enough toxins to kill a human. Human Beings.