Word: fragments
(lookup in dictionary)
(lookup stats)
Dates: during 1990-1999
Sort By: most recent first
(reverse)
...methods of DNA profiling are restriction fragment length polymorphisms analysis (RFLP) and polymerase chain reaction analysis (PCR). RFLP, the more powerful test, analyzes specific locations of the DNA that differ widely across people (see graphics...
Because microbial infections keep finding ways to outsmart antibiotics, doctors are convinced that vaccines are a better way to combat bacterial disease. A vaccine is usually made from a harmless fragment of microbe that trains the body's immune system to recognize and fight the real thing. Each person's immune system is chemically different from everyone else's, so it's very difficult for a bacterium to develop a shield that offers universal protection. Diphtheria and tetanus can be prevented by vaccines if they are used properly. A vaccine against the pneumococcus bacterium has recently come...
...tests being performed in Maryland involve two different techniques: RFLP (for restriction fragment length polymorphisms) and a newer process called PCR (polymerase chain reaction). Both are based on the fact that no two people except for identical twins have identical...
...Fragment Q1 of the Shoemaker-Levy 9 comet hurtled into Jupiter late this afternoon, and two more pieces are expected to bombard the same spot on the planet shortly. The upcoming shower follows two smaller impacts earlier today. Q1, R and S are only slightly smaller than the largest fragment, G, which hit Monday and caused the highly visible "black eye" of Jupiter...
Jupiter, already suffering a "black eye," was battered again by the splintered Shoemaker-Levy 9 comet. The eighth fragment, K, produced another huge fireball that lifted from the planet and grew to three times the size of Earth. Calculations of yesterday's damage from Fragments G and H are still being made. But astronomers are predicting that the huge hole called a black eye, which was caused by G, may become an even more distinguishing feature than Jupiter's Great Red Spot...