Word: shells
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Dates: during 1990-1999
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Located on the third floor of the Porter Exchange in Porter Square, Visconti's center, furnished with space-age sofas and chairs, caters mostly to male businessmen in their twenties and thirties. Customers have also included some Harvard and MIT students, who are willing to shell out $35 for a half hour session in order to, as the center puts it, "get in the Flow...
Government officials refused to allow Stone to photograph some of the war's wreckage, including Baath Party headquarters, which he describes as "just a shell of a building." Nor was he permitted to take pictures of police and army posts or even cemeteries. What Stone's lens did capture was human suffering, evident in scenes of malnourished children. But he also encountered remarkable resilience in the civilians he met. Many Iraqis have nothing but polluted water to drink, and while most foods and staples are plentiful, they * are being sold at exorbitant prices...
...long tails thrashing vigorously. Lured by the chemical signal, several hundred of the most energetic swimmers close in on the egg, their narrow tips unleashing a carefully timed sequence of biochemical salvos. One substance dissolves the jelly-like veil surrounding the egg. Another softens the egg's tough outer shell, preparing it for penetration. In the last moments before conception, a few dozen sperm race to break through the final barricade...
...testicular injuries or early exposure to toxic chemicals. Several methods have been devised to give these sperm a boost, including microinjection (the sperm is inserted directly into the egg by means of a microscopic needle) and partial zona drilling (a tiny hole is made in the egg's protective shell...
...while working with patients with severe sperm deficiencies that researchers noticed something surprising. Eggs whose shells had been poked open were doing a much better job of sticking to the uterus wall. In a trial performed by Dr. Jacques Cohen, one of the scientists who developed the PZD procedure, embryos successfully lodged in the womb at a rate more than five times the national average for IVF. "I was so excited I couldn't sleep at night," says Cohen. Apparently eggs with a hole in their outer membrane somehow benefit from that hole. Cohen theorizes that embryos that...