NationMaster - Encyclopedia: Beaker (glassware)

A beaker is a simple container for liquids, very commonly used in laboratories. Beakers are generally cylindrical in shape, with a flat bottom. Beakers are available in a wide range of sizes, from 1mL up to several litres. A right circular cylinder An elliptic cylinder In mathematics, a cylinder is a quadric surface, with the following equation in Cartesian coordinates: This equation is for an elliptic cylinder, a generalization of the ordinary, circular cylinder (a = b). ... The litre or liter (see spelling differences) is a unit of volume. ...

They may be made of glass (very often Pyrex) or of plastic. Beakers used for holding solutions of corrosive chemicals, such as acids, should be made of Teflon or other materials resistant to corrosion, eg borosilicate glass. Image File history File links Download high-resolution version (1000x987, 249 KB) Photograph of 3 beakers, taken by myself. ... Image File history File links Download high-resolution version (1000x987, 249 KB) Photograph of 3 beakers, taken by myself. ... // For the programming language, see Pyrex (programming language). ... For other uses, see Plastic (disambiguation). ... Corrosion is the destructive reaction of a metal with another material, e. ... For other uses, see Acid (disambiguation). ... Teflon is a trademark of DuPont and is commonly used for the chemical compound polytetrafluoroethylene. ... Hello Please take a look at my one of a kind custom pyrex glass dildos made in upstate Ny all hand sculpted not machined. ...

Beakers may be covered, perhaps by a watch glass, to prevent contamination or loss of the contents. Beakers are often graduated, 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. The accuracy of these marks can vary from one beaker to another. Caesium fluoride sample on a watch glass A watch glass is a circular, slightly concave piece of glass used in chemistry as a surface to evaporate a liquid, or as a cover for a beaker. ...

A beaker is distinguished from a flask by having sides which are straight rather than sloping. Beakers are used more often in general chemistry than flasks. Erlenmeyer flasks from the Argonne National Laboratory glassblowing shop. ...

See also

Categories: Laboratory equipment | Laboratory glassware (left to right) Erlenmeyer flask, Fleaker with upside down lid in front, Fleaker with lid on (all 300 mL), and Beaker (250 mL) A fleaker is a type of container for liquids used in the laboratory. ... An agar plate streaked with microorganisms isolated from a deep-water sponge. ... A copper aspirator. ... Front loading autoclaves are common Stovetop autoclaves need to be monitored carefully and are the simplest of all autoclaves Multiple large autoclaves are used for processing substantial quantities of laboratory equipment prior to reuse, and infectious material prior to disposal. ... Look up Bunsen burner in Wiktionary, the free dictionary. ... A calorimeter is a device used for calorimetry, the science of measuring the heat of chemical reactions or physical changes as well as heat capacity. ... An electronic bacterial colony counter. ... A colorimeter is a device used to measure the absorbance of a specific solution. ... A laboratory tabletop centrifuge A laboratory centrifuge is a piece of laboratory equipment, driven by a motor, which spins liquid samples at high speed. ... A common modern fume hood. ... A glove compartment is a compartment built into the dashboard on the passengers side of an automobile, often used for miscellaneous storage. ... In microbiology, an incubator is a device for controlling the temperature, humidity, and other conditions in which a microbiological culture is being grown. ... A laboratory equipment for the homogenization of various types of material, such as tissue, plant, food, soil, and many others. ... UV light desinfects the sterile laminar flow cabinet when not in use Laminar flow cabinet or laminar flow closet is a carefully enclosed bench designed to prevent contamination of semiconductor wafers, biological samples, or any particle sensitive device. ... A magnetic stirrer is a type of laboratory equipment consisting of a rotating magnet or stationary electomagnets creating a rotating magnetic field. ... Robert Hookes microscope (1665) - an engineered device used to study living systems. ... A 96-well microtiter plate. ... Plate readers (also know as microplate readers) are laboratory instruments designed to detect biological, chemical or physical events in samples stored in microtiter plates. ... Spectrophotometer In physics, spectrophotometry is the quantitative study of electromagnetic spectra. ... A stir bar (or flea) is a magnetic bar, used to stir a chemical reaction mixture or solution in a laboratory. ... A clinical mercury thermometer A thermometer is a device that measures temperature or temperature gradient, using a variety of different principles. ... A Mini-Vortexer with micro-centrifuge tube. ... Three static mixers: The top is an alternating spiral with each spiral offset by 90Â°; the second is the above in a delivery tube, such as for epoxy; the last is a larger metal mixer used to divide a flow into streams that intersect at 90Â°. - Static Mixers use the... Brown glass jars with some clear lab glassware in the background Laboratory glassware refers to a variety of equipment, traditionally made of glass, used for scientific experiments and other work in science, especially in chemistry and biology laboratories. ... A large, thick-walled laboratory tube used for strongly heating substances with a Bunsen burner or other heat source. ... A BÃ¼chner funnel connected to a flask with a tube leading to a vacuum pump BÃ¼chner funnel is a piece of laboratory equipment used in suction filtration. ... diagram of modern burette A burette (also buret) is a vertical cylindrical piece of laboratory glassware with a volumetric graduation on its full length and a precision tap, or stopcock, on the bottom. ... Cold fingers. ... Two different condensers are seen here: a Vigreux condenser is used as a fractionating column on left, and a Liebig condenser cools the hot vapors to liquid on right In a laboratory, a condenser is a piece of laboratory glassware used to cool hot vapors or liquids. ... A conical measure is a type of laboratory glassware which consists of a conical cup with a notch on the top to allow for the easy pouring of liquids. ... For other uses, see Crucible (disambiguation). ... This article is about a kind of glassware. ... Erlenmeyer flasks from the Argonne National Laboratory glassblowing shop. ... Conical flask For the episode of The X-Files, see The Erlenmeyer Flask. ... Round-bottom flasks are types of flasks having spherical bottoms used as laboratory glassware, mostly for chemical or biochemical work. ... Florence flask A Florence flask (also known as a round bottom flask or a boiling flask) is a piece of laboratory glassware. ... A volumetric flask. ... A BÃ¼chner funnel connected to a flask with a tube leading to a vacuum pump A BÃ¼chner flask, also known as a vacuum flask, is a thick-walled erlenmeyer flask with a glass tube and hose barb protruding about an inch from its neck, connected to an aspirator. ... A beautiful retort. ... A gas syringe showing its components separate and together A gas syringe also known as glass collecting bottle, is a piece of laboratory glassware used to draw a volume of a gas from a beaker or other closed system, or measure the volume of gas given off in a reaction. ... right|thumb|100px|Graduated cylinder. ... Glass Tube, a tube made of glass used for carrying gases between pieces of apparatus during a laboratory experiment. ... An NMR tube filled with a colorless sample, sealed with a green polyethylene cap and Parafilm Left to right: Flame, septum and polyethylene cap sealed NMR tubes Aqua regia has been added to these NMR tubes to remove all traces of organic material. ... This article is about the laboratory instrument. ... Man looking at fungus inside of petri dishes A Petri dish is a shallow glass or plastic cylindrical dish that biologists use to culture microbes. ... The pycnometer or pyknometer is a device used for measuring fluid density, also known as a specific gravity bottle. ... An selection of Schlenk flasks and a Schlenk tube (bottom right) A Schlenk flask, or Schlenk tube is a reaction vessel typically used in air sensitive chemistry, invented by Wilhelm Schlenk. ... Separating funnel A separating funnel or separation funnel or separatory funnel is a piece of equipment used in science to separate two immiscible liquids or solutions of different densities. ... A schematic representation of a Soxhlet extractor A Soxhlet extractor is a type of laboratory glassware invented in 1879 by Franz von Soxhlet. ... A test tube (Sometimes culture tube) is a kind of laboratory glassware, composed of a fingerlike length of glass tubing, open at the top, sometimes with a rounded lip at the top, and a rounded U shaped bottom. ... The Thiele tube, named after the German chemist Johannes Thiele, is a laboratory glassware designed to contain and heat an oil bath. ... A thistle tube is a piece of laboratory glassware consisting mostly of a shaft of tube, with a reservoir and funnel-like section at the top. ... Caesium fluoride sample on a watch glass A watch glass is a circular, slightly concave piece of glass used in chemistry as a surface to evaporate a liquid, or as a cover for a beaker. ...