Speed Skate Ceramic Si3N4 Inline Race Bearings SET (16) Roller Hockey

Speed Skate Ceramic Si3N4 Inline Race Bearings SET (16) Roller Hockey

Bearing Size: 8mm x 22mm x 7mm (608) - Single Shield - Ceramic Ball Bearing - SET OF 16 - This is probably the best value for high-end ceramic bearings on the market. The balls are made of Silicon Nitride, which is an excellent combination of properties that leads to thermal shock resistance, ability to withstand high structural loads to high temperature, and superior wear resistance. Silicon Nitride bearings are used in the main engines of NASA's Space Shuttles. Silicon Nitride ball bearings are harder than metal which reduces contact with the bearing track. This results in 80% less friction, 3 to 10 times longer lifetime, 80% higher speed, 60% less weight, the ability to operate with lubrication starvation, higher corrosion resistance and

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Speed, Ecstasy, Ritalin: The Science of Amphetamines

Speed, Ecstasy, Ritalin: The Science of Amphetamines

Amphetamines have had a relatively short, though chequered history. From their use in wartime, their abuse by the beat generation, up to the popularity of Ecstasy in the late 20th century, many have found amphetamines an enjoyable, though unpredictable, stimulant. More than that though, amphetamine-based treatments have been found to have beneficial effects for those suffering from attention deficit disorders, and are now widely prescribed in the US and elsewhere as a treatment for children and adults.

What is the truth behind these medical claims? What are the real effects of stimulants like Ecstasy? Just how harmful are amphetamines?

In this book, a leading authority on psychoactive drugs explores the uses and abuses of amp

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On Speed

On Speed

Uppers. Crank. Bennies. Dexies. Greenies. Black Beauties. Purple Hearts. Crystal. Ice. And, of course, Speed. Whatever their street names at the moment, amphetamines have been an insistent force in American life since they were marketed as the original antidepressants in the 1930s. On Speed tells the remarkable story of their rise, their fall, and their surprising resurgence. Along the way, it discusses the influence of pharmaceutical marketing on medicine, the evolving scientific understanding of how the human brain works, the role of drugs in maintaining the social order, and the centrality of pills in American life. Above all, however, this is a highly readable biography of a very popular drug. And it is a riveting story. Incorporating e

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On Speed: The Many Lives of Amphetamine

On Speed: The Many Lives of Amphetamine

Life in the Fast Lane: The author on the CHE Uppers. Crank. Bennies. Dexies. Greenies. Black Beauties. Purple Hearts. Crystal. Ice. And, of course, Speed. Whatever their street names at the moment, amphetamines have been an insistent force in American life since they were marketed as the original antidepressants in the 1930s. On Speed tells the remarkable story of their rise, their fall, and their surprising resurgence. Along the way, it discusses the influence of pharmaceutical marketing on medicine, the evolving scientific understanding of how the human brain works, the role of drugs in maintaining the social order, and the centrality of pills in American life. Above all, however, this is a highly readable biography of a very popular drug

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