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Glass evaporating dishes, such as watch glasses, are primarily used as an evaporating surface (though they may be used to cover a beaker.) The Petri dish is a flat dish filled with a nutritious gelatin that allows for microorganisms to quickly grow, its named after its inventor Julius Petri in the 1880s.
Alternatively, a beaker may be covered with another larger beaker that has been inverted, though a watch glass is preferable. Beakers are often graduated, that is, marked on the side with lines indicating the volume contained. For instance, a 250 mL beaker might be marked with lines to indicate 50, 100, 150, 200, and 250 mL of volume.
Beaker (glassware) Many of these flasks can be wrapped in a protective outer layer of glass, leaving a gap between the inner and outer walls. These are called jacketed flasks; they are often used in a reaction using a cooling fluid.
A Florence flask/boiling flask is a type of flask used as an item of laboratory glassware and is named after the city Florence. [1] It is used as a container to hold liquids. A Florence flask has a round body, a long neck, and often a flat botto
A watch glass is a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, for heating a small amount of substance, and as a cover for a beaker. When used to cover beakers, the purpose is generally to prevent dust or other particles from entering the beaker; the watch glass does ...
The Coordinating Ministry for Political and Security Affairs, [a] previously known as the Coordinating Ministry for Political, Legal and Security Affairs, [b] is the Indonesian government ministry in charge of the planning and policy co-ordination, as well as synchronisation of policies in the affairs of politics and national security.
Afrikaans; العربية; বাংলা; 閩南語 / Bân-lâm-gú; Башҡортса; Беларуская (тарашкевіца) Български
The original version of the Marinelli beaker, consisted of a pyrex/glass laboratory beaker with a central hollow tube projecting from the bottom. A detector, usually a glass GM tube designed for gamma counting, was positioned in the central tube while the beaker was filled with the sample. Since the sample effectively surrounded the detector ...