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DNA sequence of chromosome 7 decoded

Canadian-led project generates database with medical annotation available to the public

Scientists at The Hospital for Sick Children (HSC) have compiled the complete DNA sequence of human chromosome 7 and decoded nearly all of the genes on this medically important portion of the human genome. The research, which involved an international collaboration of 90 scientists from 10 countries, publishes in the online version of the scientific journal Science on April 10, 2003.

Two

UCLA biologists elucidate fertilization process

UCLA graduate student Jeffrey Riffell and UCLA biology professor Richard Zimmer report the first experimental test on the role of small-scale physics as it influences the interactions between sperm and egg, and the consequences for fertilization, at the annual conference of the Association for Chemoreception Sciences in Sarasota, Fla., April 10.

“The physics of fluid motion has a profound consequence on the ability of sperm to navigate and find an egg, and therefore on fertilization,” Zimmer

Superlubricant effect explained using new friction force sensor

Graphite had already been extensively studied. German physicist Martin Dienwiebel was therefore extremely surprised when he discovered a completely new effect in this well-known lubricant. During research into the frictional properties of the material, he discovered that the frictional force almost completely disappeared at a certain moment.

Dienwiebel only intended to test the new friction force microscope he had developed. The Tribolever is a raster microscope which can measure frictional

Seeking comfort from the cold

Scientists at the University of Arizona have discovered a critical cold-tolerance gene in Arabidopsis. As published in the April 15th issue of Genes & Development, the identification of ICE1 by Dr. Jian-Kang Zhu and colleagues holds promising implications for the improvement of cold tolerance in agriculturally important crops.

Cold temperature is one of the major factors affecting crop yield in temperate climates, with the farming industry loosing billions of dollars each year to freezing t

Potato-related plant species exhaust potato cyst nematode

Dutch plant ecologists have investigated how the potato cyst nematode can be controlled using Solanum sisymbriifolium, a member of the potato family. The plant produces a hatching agent which causes the nematode’’s eggs to hatch. However, the nematodes which eat the plant can no longer reproduce.

Potato cyst nematodes attack the roots of potato plants. After harvest the nematodes remain in the soil in the form of cysts. These are the dead bodies of female nematodes that are filled with egg

Researchers find protein mechanism for potential atherosclerosis development

Inactivating a protein that helps regulate the proliferation of vascular cells increases the chance of developing atherosclerosis, a major cause of heart disease, researchers at UT Southwestern Medical Center at Dallas have discovered.

Vascular vessels endure constant pounding and considerable stresses associated with blood flow. Vascular smooth muscle cells play an important role in the development of blood vessels, providing structural integrity and the ability to dilate and constrict. The

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