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Elephant's toothpaste is a foamy substance caused by the quick decomposition of hydrogen peroxide (H 2 O 2) using potassium iodide (KI) or yeast and warm water as a catalyst. [1] How rapidly the reaction proceeds will depend on the concentration of hydrogen peroxide.
The experiment is practised in schools around the world and is often used at open evenings to show the more engaging and entertaining aspects of science in secondary education settings. [2] [3] The experiment shows the amount of energy there is in a piece of candy. Jelly babies [4] or gummy bears [5] are often used for theatrics.
YEPD or yeast extract peptone dextrose, also often abbreviated as YPD, is a complete medium for yeast growth. It contains yeast extract, peptone, double-distilled water, and glucose (dextrose). [1] It can be used as solid medium by including agar. The yeast extract will typically contain all the amino acids necessary for growth.
The aqueous solution in the classical reaction contains glucose, sodium hydroxide and methylene blue. [14] In the first step an acyloin of glucose is formed. The next step is a redox reaction of the acyloin with methylene blue in which the glucose is oxidized to diketone in alkaline solution [6] and methylene blue is reduced to colorless leucomethylene blue.
It was later shown that fermentation occurs inside the yeast cells. British chemist Sir Arthur Harden divided zymase into two varieties (dialyzable and nondialyzable) in 1905. Some science historians [10] suggest that Eduard Buchner, in his 1897 work, merely repeated experiments already made by Antoine Béchamp in 1857.
The Copernicus Science Centre also organizes Family Workshops, where children (5–8 years old) together with their parents or carers can carry out experiments to help them better understand everyday phenomena (e.g. where the current in electrical outlets comes from, how a TV works, or why does yeast make dough rise). The children can easily ...
A soda geyser is a physical reaction between a carbonated beverage, usually Diet Coke, and Mentos mints that causes the beverage to be expelled from its container. The candies catalyze the release of gas from the beverage, which creates an eruption that pushes most of the liquid up and out of the bottle.
AsapScience, stylized as AsapSCIENCE, is a YouTube channel created by Canadian YouTubers Mitchell Moffit and Gregory Brown. The channel produces a range of videos that touch on various concepts related to science and technology. [1] AsapScience is one of the largest educational channels on YouTube.