Word: diagramming
(lookup in dictionary)
(lookup stats)
Dates: during 1960-1969
Sort By: most recent first
(reverse)
Stray Tails. Therein lies the key to the elegant experiment reported last week in Nature. Once the two strains of virus had finished raiding the bacteria, the experimenters dissolved their protein sheaths, exposing their raw DNA molecules (Step 1 in diagram). Next, the scientists heated the dissimilar DNA molecules, causing each double helix to unwind and separate into one lighter and one heavier strand. Taking only the heavier strand from each virus, the researchers placed them in the same test tube, reheated them and then cooled them slowly, a process that causes two chemically complementary strands of DNA to combine...
...devoured by larger fish with yet another increase in DDT concentration (2.0 ppm). By the time the chemical had passed into the bodies of such fish-eating birds as cormorants, mergansers and ospreys its concentration (25 ppm) had increased an astounding 10 million times over the original amount (see diagram...
...neurophysiologists now see it, when a man gets a shot of penicillin in the buttock, the stab sends an impulse along the nerve fibers to the fourth lumbar vertebra (see diagram). Then the impulse travels upward and soon crosses over to the opposite side of the spinal cord for its journey toward the brain. Along the way it triggers an automatic reflex that causes the man to flinch and tighten his gluteal muscle. After the impulse reaches the thalamus, a major (and evolutionally ancient) junction box at the base of the brain, where it is perceived as pain, it proceeds...
...this particular molecule contains 19,996 atoms (of hydrogen, carbon, nitrogen, oxygen and sulphur) grouped in 1,320 amino-acid units, which in turn are assembled with the aid of chemical bonds into two "light" chains of 214 amino acids apiece and two "heavy" chains of 446 each (see diagram). Schematically, the four chains, in which the acids are strung like beads, look like a letter T. The middle part of the T varies little from antibody to antibody. The chains' ends at the tips of the crossbar constitute the antibody's active regions and can be varied...
...passenger's dream as well. Gone is the claustrophobic feeling of riding in a cigar tube. The plane's fuselage is 231 feet long and as tall as a two-story building; the interior cabin is almost twice as wide as that of the Boeing 707 (see diagram). Each airline will be free to deck out the passenger cabin as it pleases. In most versions, seats will be 10% wider than those in the current jets. In economy class, there will be rows of nine seats separated by two aisles to form a two-four-three seating pattern...