Word: celling
(lookup in dictionary)
(lookup stats)
Dates: during 1980-1989
Sort By: most recent first
(reverse)
...perfect. "My favorite game is Life Force at Quincy House," says Scott. "You go through an android's body, into the stomach, hungs, kidneys, and you kill antibodies. I've never made it to the end, but I hear you finish at the brain, and there's this mutant cell..." His voice trailed off as the game began and he concentrated on manuevering his man through the 3-D screen, dodging threatening cilia, gas bubbles, and muscle tissue...
Anyway, who can afford to keep all offenders behind bars? Depending on the prison, it can cost from $7,000 to more than $30,000 to keep a criminal in a cell for a year. Most alternative programs, their backers argue, allow lawbreakers to live at home, saving tax dollars while keeping families intact and off welfare. Since the detainees can get or keep jobs, part of their salaries can be paid out as fines or as compensation to victims. And alternatives give judges a sentencing option halfway between locking up offenders and turning them loose...
Most of the DNA in human cells is in the cell nucleus, in the form of chromosomes. Since chromosomes come from both parents, this nuclear DNA is reshuffled with each generation, confusing the line of inheritance. But there is also DNA outside the nucleus, in mitochondria, substructures within each cell that are responsible for producing energy the cell needs. Since the sperm's mitochondria do not survive fertilization intact, mtDNA is inherited solely through the mother. The only way it can change over the generations is through mutation. And that mutation, evidence suggests, proceeds at a steady, known rate...
...uses of fetal-cell surgery, the most successful to date has been the treatment of Type 1 (insulin-dependent) diabetes. This disease, which afflicts about a million Americans, results from the gradual destruction of small islets of insulin-producing cells in the pancreas. Without insulin, the body cannot convert sugars into energy. Even with careful diet and daily doses of insulin, Type 1 diabetes can eventually lead to blindness, kidney failure and strokes...
Past attempts to implant fetal islet cells failed because a small percentage of these cells have antigenic markers that trigger an immune response. "The classic view was that since these antigens were genetically controlled, there was no way to remove them from the cell," says Kevin Lafferty, an Australian-born immunologist who is director of research at the Barbara Davis Center for Childhood Diabetes in Denver. In 1980, however, Lafferty discovered that culturing islet cells in an oxygen-rich environment for a couple of weeks kills those that bear trigger antigens. Says Calvin Stiller, an immunologist at the University...