Evolution of taste receptor may have shaped human sensitivity to toxic compounds
Researchers have found new evidence suggesting that the ability to taste bitter compounds has been strongly advantageous in human evolution. Animals rely on chemical perception, including the senses of taste and smell, for protection against the harmful compounds found in nature. It is widely believed that behavioral and dietary choices may have reduced the importance of such chemical perc...MicroRNAs have shaped the evolution of the majority of mammalian genes
RNA continues to shed its reputation as DNA's faithful sidekick. Now, researchers in the lab of Whitehead Institute Member David Bartel have found that a class of small RNAs called microRNAs influence the evolution of genes far more widely than previous research had indicated. "MicroRNAs are affecting the majority of protein-coding genes, either at a functional level or an evolutionary lev...What's shaped like a pear and has 2 genomes? Check the pond
If you could peer microscopically into the closest freshwater pond, you'd hesitate before dipping a toe. Amid the murky water, you'd probably notice an oddly furry, pear-shaped organism gliding along--and gobbling up everything in its path. --and a big fan club among scientists, as a star organism for research into how cell...Why is the heart heart-shaped?
How does the heart attain its characteristic shape? Shape may be sculpted by cell movement, cell division, or changes in cell size and shape, all of which can be influenced by the local environment. The heart appears as a simple tube early in development; later, the tube walls bulge outward to form the cardiac chambers. In a new study published online in the open access journal PLoS Biol...Soft Contacts Designed for Cone-Shaped Cornea
Custom-designed contacts improved vision for subjects with keratoconic eyes and offer hope of nonsurgical treatment instead of corneal transplants . University of Rochester researchers describe the custom design techniques and results of visual acuity tests in a paper published in April in Optics Letters. Keratoconic eyes are rare but disabling. From the side, the eyes look more poi...Sugita Aneurysm Clip L-Shaped (S)
Description:Extremely wide blade opening. Excellent bio and MRI compatibility. Lot number on each clip. Long reliable history. Large type 1/1 (mm), opening width 8.0 mm and length 5 mm....Sugita Aneurysm Clip L-Shaped (M)
Description:Extremely wide blade opening. Excellent bio and MRI compatibility. Lot number on each clip. Long reliable history. Large type 1/1 (mm), opening width 8.0 mm and length 7.5 mm....Sugita Aneurysm Clip L-Shaped w/cvd. (S)
Description:Extremely wide blade opening. Excellent bio and MRI compatibility. Lot number on each clip. Long reliable history. Large type 1/1 (mm), opening width 6.0 mm and length 10 mm....Sugita Aneurysm Clip L-Shaped w/cvd. (L)
Description:Extremely wide blade opening. Excellent bio and MRI compatibility. Lot number on each clip. Long reliable history. Large type 1/1 (mm), opening width 6.0 mm and length 7.5 mm....