Dazzle

Lithium is presently being recovered from brines of Searles Lake, in California, and from those in Nevada. Large deposits of quadramene are found in North Carolina. The metal is produced electrolytically from the fused chloride. Lithium is silvery in appearance, much like Na and K, other members of the alkali metal series. It reacts with water, but not as vigorously as sodium. Lithium imparts a beautiful crimson color to a flame, but when the metal burns strongly, the flame is a dazzling white. 

As said earlier in this chapter, the use of properly arranged ilkunination will improve the visibility of the smoke markedly. Extra light should be arranged so that the light beams ace directed almost directly into the eyes of the observer or into the lens of a camera. Direct dazzling must be avoided with tlie help of some shield. The use of a laser beam expanded to a sheet makes it possihle to isualize the airflow in a special layer in the room. This technique makes it possible to study the airflow in more detail, e.g, near an enclosure or around a machine. ... 

Examination of the chemical composition of cells reveals a dazzling variety of organic compounds covering a wide range of molecular dimensions (Table 1.2). As this complexity is sorted out and biomolecules are classified according to the similarities in size and chemical properties, an organizational pat-... 

Verbleiung,/. leading lead lining, verblenden, v.t. blind, dazzle dim, black out ... 

Safety Considerations. High-power lasers raise a number of safety issues. There are the flammability and the toxicity of dye solutions. Most importantly, the eye hazards of laser radiation require careful shielding of the beam, and interlocks that restrict access to the laser room and to the dome. The laser could also dazzle aircraft pilots if they look directly down the beam. It is therefore necessary to close a shutter in the beam when a plane comes too close, either manually by human spotters, or automatically by use of radar, thermal IR or CCD cameras. Care must also be taken to avoid hitting overhead satellites in the case of pulsed or high power laser systems. 

Eor example, street lamps use the emissions from excited sodium atoms, the dazzling colors of a fireworks display come from photons emitted by metal ions in excited states, and the red light in highway flares often comes from excited Sr ions. 

There are the same typically dangerous reactions as with sulphides. Antimony pentasuiphide is not mentioned in the specialised literature, but it is unlikely that it behaves in a different way from the trisulphide. Antimony trisulphide can produce dazzling white flames. This is the reason it is used in pyrotechnics. 

Suddenly I knew that he was not a king but a man, and not even that. He was a boy still, hasty in his desire, driven by what his body spoke of his need, with no thought for the dull aftermath when that need was fulfilled. I was his elder by but five years I had known one man, and he many women. They were perhaps dazzled into yielding by his height, his smile, his gilded skin, his crown. But I had not yielded back in the orchard, and I would not now, for I had learned in years of wedlock what it seemed he had not in his bachelorhood, not even from all those yielding women how desire, held in check, feeds on itself and grows. If I could hold him back... 

With the public dazzled by color and companies desperate to survive, factors such as clean air, pure water, and workers safety paled in importance. In a hasty pencil sketch of his family factory in England, Perkin drew one- or two-story buildings with tall brick chimneys and smoke blowing merrily out their tops. Water for the Perkins factory came from an artesian well, and waste was, no doubt, dumped in the handy canal. 

Even as Carothers was explaining the fundamental nature of large biological molecules, he orchestrated a miraculous two weeks in the history of industrial research. During April 1930, he and his team invented not only Neoprene, the first high-grade synthetic rubber, but also polyester, the first synthetic fiber that closely resembled silk. It was a dazzling accomplishment that can still make industrial chemists starry-eyed. 

Potassium chlorate (or other metal halogenate) intimately mixed with arsenic, carbon, phosphorus, sulfur or other readily oxidised materials gives friction-, impact- and heat-sensitive mixtures which may explode violently [1], When potassium chlorate is moistened with a solution of phosphorus in carbon disulfide, it eventually explodes as the solvent evaporates and oxidation proceeds [2], Boron bums in molten chlorate with dazzling brilliance [3]. Mixtures of the chlorate and finely powdered sulfur containing over 20% of the latter will explode under a hammer-blow [4],... 

In the early 1970s, the Intel 8080 microprocessor was dazzling engineers around the world with its blazing computational speed of 2MHz Digital became the anthem for a new... 

Arguably the best way to accelerate the rate of a reaction catalyzed by a soluble transition metal catalyst is by preventing deactivation of the catalyst. Most chemists who have investigated the kinetics of transition metal-catalyzed reactions are familiar with kinetic curves that shoot off with dazzling speed during... 

It s quite common when driving at night to be dazzled by the lights of the vehicle behind as they reflect from the driver s new-view or door mirror. We can prevent the dazzle by forming a layer of coloured material over the reflecting surface within an electrochromic mirror. Such mirrors are sometimes called smart mirrors or electronic anti-dazzle mirrors . 

We can now explain how an electrochromic car mirror operates. The mirror is constructed with II in its colourless form, so the mirror functions in a normal way. The driver activates the mirror when the anti-dazzle state of the mirror is required, and the coloured form of methylene blue (MB+) is generated oxidatively according to Equation (7.24). Coloured MB+ blocks out the dazzling reflection at the mirror by absorbing about 70 per cent of the light. After our vehicle has been overtaken and we require the mirror to function normally again, we reduce MB+ back to colourless MB0 via the reverse of Equation (7.24), and return the mirror to its colourless state. These two situations are depicted in Figure 7.6. 

Figure 7.6 Mirrors (a) an ordinary car driver s mirror reflects the lights of a following car, which can dazzle the driver (b) in an electrochromic mirror, a layer of optically absorbing chemical is electro-generated in front of the reflector layer, thereby decreasing the scope for dazzle. The width of the arrows indicates the relative light intensity...

Imagine a sphere of dazzling white brilliance above your head. Then, with an exhalation of breath, see a beam of white light descend and form another sphere of white light at the throat area. On an out-breath, see a beam descend from the second sphere to establish a third in your chest region. Continue the same process to build a fourth sphere in your... 

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