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Petri dish. A glass Petri dish with culture. A Petri dish (alternatively known as a Petri plate or cell-culture dish) is a shallow transparent lidded dish that biologists use to hold growth medium in which cells can be cultured, [1][2] originally, cells of bacteria, fungi and small mosses. [3] The container is named after its inventor, German ...
Liesegang rings (/ ˈliːzəɡɑːŋ /) are a phenomenon seen in many, if not most, chemical systems undergoing a precipitation reaction under certain conditions of concentration and in the absence of convection. Rings are formed when weakly soluble salts are produced from reaction of two soluble substances, one of which is dissolved in a gel ...
An agar plate is a Petri dish that contains a growth medium solidified with agar, used to culture microorganisms. Sometimes selective compounds are added to influence growth, such as antibiotics. [1] 96 pinner used to perform spot assays with yeast, fungal or bacterial cells. Individual microorganisms placed on the plate will grow into ...
Agar (/ ˈeɪɡɑːr / or / ˈɑːɡər /), or agar-agar, is a jelly-like substance consisting of polysaccharides obtained from the cell walls of some species of red algae, primarily from "ogonori" (Gracilaria) and "tengusa" (Gelidiaceae). [1][2] As found in nature, agar is a mixture of two components, the linear polysaccharide agarose and a ...
Using a petri dish gel, the saliva sample is added and allowed to diffuse through the gel overnight. Visualization is accomplished by adding iodine to the gel which stains the starch in the gel blue. If saliva is present, then the alpha-amylase breaks down the starch, creating a clear coloured circle around where the sample was placed.
How boujee!!”. 5. Dead or dying or ded. No, Gen Z is not *actually* dead. They just say this when something’s funny to the extent that it could kill you. Think, ‘dying of laughter,’ tummy ...
Christophe Besnier, Inrap. A centuries-old mystery surrounding a poet buried in Notre Dame in Paris could be close to being solved thanks to archaeological digs at the world-famous cathedral ...
Cell spreader. In microbiology, a cell spreader or plate spreader is a tool used to smoothly spread cells and bacteria on a culture plate, such as a petri dish. Cell spreaders can be made from glass, plastic, or metal, and come in various shapes. A Drigalski spatula is a cell spreader consisting of a cylindrical rod or wire bent in the shape of ...