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Tag: "bottom" at biology news

Scientists discover the cellular roots of graying hair

...se to color-making melanocytes that journey to the bottom of thehair follicle: That is where they tint the keratinocytes with theperson’s characteristic hue.By studying mice at progressively older intervals, Fisher and hiscolleagues discovered that as the rodents aged and their hair beganturning gray, the n...

Purdue proves concept of using nano-materials for drug discovery

...avities that are open at the top and sealed at the bottom with a material called alumina, which contains numerous pores measured in nanometers, or billionths of a meter. Researchers are working to duplicate how cell membranes function on chips in order to test the potential effectiveness of new drugs to tr...

Needling Chromosomes Reveals Cell Division Secret

...s isarranged such that your view is up through the bottom of the cell, andthe needles are coming down through a layer of oil covering the cell topreserve it."So, you also have to constantly adjust the focus to determine wherethe needle is coming down into the cell. This is difficult with oneneedle, but with...

Researchers reveal the infectious impact of salmon farms on wild salmon

...h farming in wild salmon habits. "There's a double bottom line here. The full ecological costs of industrial scale salmon farming must be quantified as well as the economic ones," says Volpe. "For the migratory runs we studied, there may be very little time left." ...

Antarctic ice shelf retreats happened before

...fted.' The scientists analysed sediments from the bottom of a freshwater lake close to the edge of the present George VI Ice Shelf. The results revealed that about 9500 years ago the ice shelf retreated, allowing the sea to flood into the lake. The ice shelf didn't reform until 1500 years later, and has be...

Poor prenatal nutrition permanently damages function of insulin-producing cells in the pancreas

...enough insulin in response to blood glucose. "The bottom line is that if you don't have delivery of enough nutrients from the mother to the baby, the baby's pancreatic cells will be programmed abnormally," said principal investigator Mary-Elizabeth Patti, M.D., Assistant Investigator in Joslin's Research S...

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