means that it is used during the production of many other chemicals, whereas some of the uses of nitrogen and the rare gases depend on their inertness. uses oxygen the largest user of oxygen is the steel industry. it is also used in the manufacture of other metals, notably copper and lead . it is more...
soil movement is reduced by the confinement and reinforcing action of geotextiles, which function by absorbing part of the stress that normally would cause shear failure. drainage the lengthwise permeability of the geotextile allows it to perform as a drain. the amount of drainage is proportional to...
a few years later, she joined the medical research council biophysics research unit at king's college london, applying these techniques to dna. it was in may that rosalind and raymond gosling successfully produced photograph by shining an x-ray beam for more than hours at right angles onto a sample of...
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