Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Shell shattering

Brisanz, /. brisance. shattering power, -ge-schoss, n. high-exploeive shell, H.E. shell, -sprengstoff, m. high explosive, disruptive. Brise, /. breeze. [Pg.82]

It is possible that microbubble shell may be shattered during the interaction with an ultrasound pulse. Indeed, drastic variation of microbubble size, up to several-fold in less than a microsecond, has been reported [33], with linear speeds of the wall motion of microbubble approaching hundreds of meters per second in certain conditions. At these rates, it is easy to shatter the materials that would otherwise flow under slow deformation conditions. In some cases (e.g., lipid monolayer shells, which are held together solely by the hydrophobic interaction of the adjacent molecules), after such shattering the re-formation of the shell maybe possible in other cases - e.g., with a solid crosslinked polymer or a denatured protein shells - the detached iceberg-like pieces of the microbubble shell coat would probably not re-form and anneal, and the acoustic response of microbubbles to the subsequent ultrasound pulses would be different [34]. [Pg.84]

Detonation (and Explosion), Mechanical Effects of. These include blast effects, which are described in Vol 2 of Encycl, pp B180 ff and shattering effect, described in Vol 2, pp B265 ff, under BRISANCE. The latter effect causes fragmentation of bombs, shells, grenades, rockets, mines, torpedoes,etc... [Pg.441]

The conch shell, which is 99% calcium carbonate, is therefore really a composite material in which proteins provide the toughness that makes the shell so resistant to shattering. Although the conch shell itself is not useful (except to the conch), it illustrates how composites may offer much greater strength than the individual substances involved. Lessons learned from the conch... [Pg.775]

Trinitrotoluene belongs to the shattering class of explosives known as the brisants. The members of this class possess great force, and upon exploding, shatter the containing shell into small pieces, thus doing more damage per shell. [Pg.3]

In a spray dryer, the feed material characteristics, in combination with the type of feed atomization, affect the surface characteristics, shape, density, and particle size of the product. Thin-shelled particles may shatter when they come in contact with high temperature drying gases or if the particles impact the walls and fittings in the ductwork. Of course, shattered particles are not usually a desired product (Papiagonnes, 1992). [Pg.267]

The total weight of rock vaporised and melted instantaneously as the shock passes is thus approximately 310 tons per kiloton, and the initial cavity thus formed attains a radius of more than 3 metres. The weight estimated above is significantly lower than the total quantity of rock melted by the explosion, because it is necessary to take into account other melting processes, known as secondary processes. Beyond the solid matrix melting radius, over a distance of a few metres, the interstitial water is vaporised. As it expands, the high-pressure steam shatters the matrix, which is divided into particulate fines. When the cavity later expands under the effect of the thrust of the gases, part of this zone of powdered rock is recompacted and partially sintered. It forms a low-permeability shell around the cavity. [Pg.503]

Sand Test or Sand Crushing Test(Sandprobe, in Ger) (Essai au sable, in Fr) (Prueba de la arena, in Span). This test, devised by W.O.Snelling in 1910 and studied extensively by C.G.Storm W.C.Cope(Ref I), is considered to measure the shattering disruptive) power of an ezpl, called brisance. This characteristic is important because it determines the effectiveness with which an ezpl can fragment a shell, bomb casing, grenade or warhead of a rocket... [Pg.719]

A bed of catalyst consisting of 200 g spherical egg-shell catalysts was employed in the fixed bed reactor. The catalyst bed was diluted by shattered steatite particles (0.9 mm < d < 1.6 mm) in a mass ratio 1 1 to obtain a plug flow system. The catalyst used throughout the study was prepared by coating spherical steatite particles of 4-5 mm diameter with a porous oxidic layer. The egg-shell catalyst contained 20 weight % active component, the thickness of the shell being 215 xm. The oxidic catalyst consisted mainly of Mo, V and Cu, its preparation has been described elsewhere [10]. [Pg.984]

Fig. 2-25. The Japanese UJI bacterial bomb, drawn from sketches given to Lieutenant Colonel Murray Sanders, Chemical Warfare Service, in 1945. Porcelain rather than metal was used to form the shell because it could be shattered by a much smaller explosive charge. This protected the biological agent, assuring that it would be subjected to less heat and pressure. Reprinted from Scientific and Technical Advisory Section, US Army Forces, Pacific. Biological Warfare. Vol 5. In Report on Scientific Intelligence Survey in Japan. HQ, US Army Forces, Pacific 1945 appended chart. Fig. 2-25. The Japanese UJI bacterial bomb, drawn from sketches given to Lieutenant Colonel Murray Sanders, Chemical Warfare Service, in 1945. Porcelain rather than metal was used to form the shell because it could be shattered by a much smaller explosive charge. This protected the biological agent, assuring that it would be subjected to less heat and pressure. Reprinted from Scientific and Technical Advisory Section, US Army Forces, Pacific. Biological Warfare. Vol 5. In Report on Scientific Intelligence Survey in Japan. HQ, US Army Forces, Pacific 1945 appended chart.
The capsule shell should be of the desired color, size, and brittleness. Traditional gelatin capsule shells should remain flexible. Under certain storage conditions, gelatin capsule shells can become hard and brittle. When the shells are squeezed between two fingers, a brittle shell will snap and in extreme cases shatter. Brittleness occurs due to cross-linking of the gelatin and this cross-linking adversely affects the dissolution of the capsule. Capsule color has also been known to fade over time. [Pg.204]


See other pages where Shell shattering is mentioned: [Pg.334]    [Pg.334]    [Pg.454]    [Pg.276]    [Pg.80]    [Pg.90]    [Pg.342]    [Pg.28]    [Pg.8]    [Pg.39]    [Pg.31]    [Pg.265]    [Pg.719]    [Pg.29]    [Pg.718]    [Pg.775]    [Pg.378]    [Pg.107]    [Pg.628]    [Pg.44]    [Pg.303]    [Pg.25]    [Pg.73]    [Pg.158]    [Pg.589]    [Pg.547]    [Pg.87]    [Pg.94]    [Pg.97]    [Pg.55]    [Pg.44]    [Pg.789]    [Pg.612]    [Pg.73]    [Pg.199]    [Pg.24]    [Pg.118]    [Pg.110]   
See also in sourсe #XX -- [ Pg.84 ]




SEARCH



Shattering

© 2024 chempedia.info