For example, negatively-charged colloidal silica or clay particles can be flocculated by the addition of a positively-charged polymer.

For example, water can also form amorphous ice, while SiO < sub > 2 </ sub > can form both fused silica ( an amorphous glass ) and quartz ( a crystal ).

For instance, in ideally bonded amorphous silica all Si atoms have 4 bonds to O atoms and all O atoms have 2 bonds to Si atom.

For example, dynamite is a mixture of highly sensitive nitroglycerin with sawdust, powdered silica, or most commonly diatomaceous earth, which act as stabilizers.

For example, silica is functionalized with an alkyl silicone, wherein the alkyl contains an amine functional group.

For example, a simple routine of coating cotton fabric with silica or titania particles by sol-gel technique has been reported, which protects the fabric from UV light and makes it superhydrophobic.

For applications where a flatter ( less shiny ) sheen is desired, products containing amorphous silica, such as " Shellac Flat ," may be added to the dissolved shellac.

For example, S-11 uses the caesium-antimony photocathode with a lime glass window, S-13 uses the same photocathode with a fused silica window, and S-25 uses a so-called " multialkali " photocathode ( Na-K-Sb-Cs, or sodium-potassium-antimony-caesium ) that provides extended response in the red portion of the visible light spectrum.

For instance, reagent-quality water must have very low levels of impurities like sodium and chloride ions, silica, and bacteria, as well as a very high electrical resistivity.

For example, dinitrophenylhydrazine coated onto a silica sorbent is the basis of an adsorption cartridge.

For example, the seven different crystalline forms of quartz silica ( silicon dioxide, SiO < sub > 2 </ sub >) are all clear, transparent materials.

For example, iron oxidizing bacteria are abundant in marine and terrestrial hydrothermal systems, where they often display distinctive cell morphologies and are commonly encrusted by minerals, especially bacteriogenic iron oxides and silica.

For example, diatoms from the Eocene age ( approximately 40 to 50 million years old ) are not as effective in their ability to absorb fluids because older diatoms such as this recrystallize, their small pores becoming filled with silica.

For example, the fibers first demonstrated by Russell consisted of a hexagonal lattice of air holes in a silica fiber, with a solid ( 1996 ) or hollow ( 1998 ) core at the center where light is guided.

For bricks of extreme refractory character, the aluminium oxide content can be as high as 50-80 % ( with correspondingly less silica ).

For high melting point casting, such as steels, a minimum of 98 % pure silica sand must be used ; however for lower melting point metals, such as cast iron and non-ferrous metals, a lower purity sand can be used ( between 94 and 98 % pure ).

For example, silica sand can be vaporized with an arc plasma at atmospheric pressure.

For silica column chromatography, this ratio lies within 20: 1 to 100: 1, depending on how close to each other the analyte components are being eluted.

For example, one of the most widely used silica gel grades in the former technique is mesh 230 – 400 ( 40 – 63 µm ), while the latter technique typically requires mesh 70 – 230 ( 63 – 200 µm ) silica gel.

For instance, if normal phase silica gel is used as the stationary phase it can be considered polar.

For silica gel coated TLC plates, the elutant strength increases in the following order: Perfluoroalkane ( weakest ), Hexane, Pentane, Carbon tetrachloride, Benzene / Toluene, Dichloromethane, Diethyl ether, Ethylacetate, Acetonitrile, Acetone, 2-Propanol / n-Butanol, Water, Methanol, Triethylamine, Acetic acid, Formic acid ( strongest ).

For example, the stems of certain plants will collapse when grown in soil lacking silica.

For example, if we were making a component out of alumina, aluminium oxide, then we would still use a silica sol, but alumina filler powder.

For example, in the US D, E, and F PCS spectrum blocks, the amount of spectrum available is 5 MHz in each direction.

For circular fibers in a closely packed hexagonal array, the packing efficiency is given by: Af where Af, and 0.906 is the ratio of the area of a circle to that of the circumscribed hexagon.

For the small diameter fibers now technically feasible and required for about 100 Af resolution, Af.

For example, there are slow-conducting unmyelinated C fibers and faster-conducting myelinated Aδ fibers.

For example, the fibers in carbon fiber materials and rebars in reinforced concrete are oriented to withstand tension.

For these purposes, manufactured rubber fiber is made as either an extruded round fiber or rectangular fibers that are cut into strips from extruded film.

For optical fibers, a power-law index profile is an index of refraction profile characterized by

For telecommunications-grade fibers, the reference surface is the outer surface of the cladding.

For these reasons, single-mode fibers can have a higher bandwidth than multi-mode fibers.

For example, fibers for clothing, wood for shelter and warmth.

For example, carbon fibers are commonly used in aluminum matrix to synthesize composites showing low density and high strength.

For wool garments, this is due to scales on the fibers which heat and agitation cause to stick together.

For clothing, spandex is usually mixed with cotton or polyester, and accounts for a small percentage of the final fabric, which therefore retains most of the look and feel of the other fibers.

For example, 200 tex for 3, 000 filaments of carbon fiber is three times as strong as 1, 000 carbon fibers, but is also three times as heavy.

For example, carbon fiber has much higher Young's modulus ( is much stiffer ) when force is loaded parallel to the fibers ( along the grain ).

For example, the hippies of the 60s often toted long hair ( sometimes in dread lock form ), sandals and inexpensive clothing made of natural fibers.

For every x in X, the fiber over x is a discrete subset of C. On every connected component of X, the fibers are homeomorphic.

For example, the olfactory nerve fibers are short and without myelin, but the optic nerve fibers are myelinated ( the olfactory and optic nerves are considered as a parts of the CNS, while other cranial nerves are a component of the PNS ).

For a gemstone to show this effect best it must be cut en cabochon, with the fibers or fibrous structures parallel to the base of the finished stone.

It is designed to support the picture of E ' above ' B, by allowing a homotopy taking place in B to be moved ' upstairs ' to E. For example, a covering map has a property of unique local lifting of paths to a given sheet ; the uniqueness is to do with the fact that the fibers of a covering map are discrete spaces.

For example, a square or equilateral-triangle core would also have two equal-speed polarization solutions for the fundamental mode ; such general shapes also arise in photonic-crystal fibers.

For example, there are slow-conducting unmyelinated C fibers and faster-conducting myelinated Aδ fibers.