bentonite / ˈ b ɛ n t ə n ʌ ɪ t / is an absorbent aluminium phyllosilicate clay consisting mostly of montmorillonite.one of the first occurrences of bentonite was found in the cretaceous benton shale near rock river, wyoming.the fort benton group, along with others in stratigraphic succession, was named after fort benton, montana in the mid-19th century by fielding bradford meek and f .
concrete, usually portland cement concrete for its visual resemblance to portland stone , is a composite material composed of fine and coarse aggregate bonded together with a fluid cement cement paste that hardens over time—most frequently in the past a lime-based cement binder, such as lime putty, but sometimes with other hydraulic cements, such as a calcium aluminate cement or portland .
the traditional tool for making dowels is a dowel plate, an iron or better, hardened tool steel plate with a hole having the size of the desired dowel.to make a dowel, a piece of wood is split or whittled to a size slightly bigger than desired and then driven through the hole in the dowel plate.
hops are the flowers also called seed cones or strobiles of the hop plant humulus lupulus. they are used primarily as a bittering, flavouring, and stability agent in beer, to which, in addition to bitterness, they impart floral, fruity, or citrus flavours and aromas. hops are also used for various purposes in other beverages and herbal medicine.the hop plant is a vigorous, climbing .
caffeine is a central nervous system cns stimulant of the methylxanthine class. it is the world's most widely consumed psychoactive drug. unlike many other psychoactive substances, it is legal and unregulated in nearly all parts of the world.
the timeline of historic inventions is a chronological list of particularly important or significant technological inventions and the people who created the inventions.. note: dates for inventions are often controversial. inventions are often invented by several inventors around the same time, or may be invented in an impractical form many years before another inventor improves the invention .
a light-emitting diode led is a semiconductor light source that emits light when current flows through it. electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons.the color of the light corresponding to the energy of the photons is determined by the energy required for electrons to cross the band gap of the semiconductor.
in metalworking and jewellery making, casting is a process in which a liquid metal is somehow delivered into a mold usually by a crucible that contains a negative impression i.e., a 3-dimensional negative image of the intended shape.the metal is poured into the mold through a hollow channel called a sprue.the metal and mold are then cooled, and the metal part the casting is extracted.
peat / p iː t / , also known as turf / t ɜːr f / , is an accumulation of partially decayed vegetation or organic matter.it is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. the peatland ecosystem is the most efficient carbon sink on the planet, because peatland plants capture co 2 naturally released from the peat, maintaining an equilibrium.
a paper machine or paper-making machine is an industrial machine which is used in the pulp and paper industry to create paper in large quantities at high speed. modern paper-making machines are based on the principles of the fourdrinier machine, which uses a moving woven mesh to create a continuous paper web by filtering out the fibres held in a paper stock and producing a continuously .
the wooden dowel rod used in woodworking applications is commonly cut into dowel pins, which are used to reinforce joints and support shelves and other components in cabinet making.some woodworkers make their own dowel pins, while others purchase dowel pins precut to the required length and diameter.
melamine / ˈ m ɛ l ə m iː n / is an organic compound with the formula c 3 h 6 n 6.this white solid is a trimer of cyanamide, with a 1,3,5-triazine skeleton. like cyanamide, it contains 67% nitrogen by mass, and its derivatives have fire retardant properties due to its release of nitrogen gas when burned or charred. melamine can be combined with formaldehyde and other agents to produce .
these machines vary in size between small to medium compared to other rotational machines. vertical rotational molding machines are energy efficient due to their compact heating and cooling chambers. these machines have the same or similar capabilities as the horizontal carousel multi-arm machines, but take up much less space.
the venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section or choke of a pipe. the venturi effect is named after its discoverer, giovanni battista venturi . 1.1 choked flow. 1.2 expansion of the section. 2 experimental apparatus. 2.1 venturi tubes. 2.2 orifice plate.
a timeline of united states inventions 1890–1945 encompasses the ingenuity and innovative advancements of the united states within a historical context, dating from the progressive era to the end of world war ii, which have been achieved by inventors who are either native-born or naturalized citizens of the united states.
the single-serve coffeemaker technology often allows the choice of cup size and brew strength, and delivers a cup of brewed coffee rapidly, usually at the touch of a button. today, a variety of beverages are available for brewing with single-cup machines such as tea, hot chocolate and milk-based speciality beverages. single-cup coffee machines .
australia is the largest producer of bauxite, followed by china. in 2017, china was the top producer of aluminium with almost half of the world's production, followed by russia, canada, and india. although aluminium demand is rapidly increasing, known reserves of its bauxite ore are sufficient to meet the worldwide demands for aluminium for many centuries.
way oil the oil made for machine tool ways works as a cutting oil. in fact, some screw machines are designed to use one oil as both the way oil and cutting oil. most machine tools treat way lube and coolant as separate things that inevitably mix during use, which leads to tramp oil skimmers being used to separate them back out.
the general idea behind the ball mill is an ancient one, but it was not until the industrial revolution and the invention of steam power that an effective ball milling machine could be built. it is reported to have been used for grinding flint for pottery in 1870. 4 advantages of the ball mill. in case of continuously operated ball mill, the .
the general idea behind the ball mill is an ancient one, but it was not until the industrial revolution and the invention of steam power that an effective ball milling machine could be built. it is reported to have been used for grinding flint for pottery in 1870.