Led Scientists Find Antibodies that Prevent Most HIV Strains from Infecting Human Cells. Scientists have discovered two potent human antibodies that can stop more than 90 percent of known global HIV strains from infecting human cells in the laboratory, and have demonstrated how one of these disease-fighting proteins accomplishes this feat.
According to the scientists, these antibodies could be used to design improved HIV vaccines, or could be further developed to prevent or treat HIV infection. Moreover, the method used to find these antibodies could be applied to isolate therapeutic antibodies for other infectious diseases as well. “The discovery of these exceptionally broadly neutralizing antibodies to HIV and the structural analysis that explains how they work are exciting advances that will accelerate our efforts to find a preventive HIV vaccine for global use,” says Anthony S. Fauci, M.D., director of the National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health.
NIAID scientists Peter D. Top 10 Reasons to Love Viruses. Viruses can often be seen in a very poor light, but they aren’t all bad.
In fact, we humans probably wouldn’t exist without viruses. Author Michael Brooks writes about the upside of sharing the planet with these ruthless killer machines. Here are the top 10 reasons to love viruses. Ah-Choo! 10. Evolution’s greatest innovation – the cell nucleus – is thought to have come from a virus ( The cell nucleus and a virus are packaged DNA encased in a protein coating. No Longer Human. Henrietta Lacks achieved a kind of immortality on February 9, 1951.
On that day a sample of cancerous cells from her cervix was transferred to a culture dish, doused with nutrients, and left to grow. Lacks, a 30-year-old mother of four from Baltimore, had one of the most aggressive cervical cancers her doctors had ever seen, and the cells culled from her tumor grew avidly, doubling their number each day. Then they escaped. Small spills are always happening in laboratories; what distinguished Lacks’s cells was their ability to survive after they were somehow spilled. They were so hardy that if just one of them fell on a petri dish it would outgrow and overwhelm anything else living on that dish within a month. 7.03 Genetics, Fall 2004. Cells flow like glass, study finds. By studying cellular movements at the level of both the individual cell and the collective group, applied physicists have discovered that migrating tissue flows very much like colloidal glass.
The research, led by investigators at Harvard’s School of Engineering and Applied Sciences (SEAS) and the University of Florida, advances scientists’ understanding of wound healing, cancer metastasis, and embryonic development. The finding was published online Feb. 14 in Proceedings of the National Academy of Sciences. Cells often move from one part of the body to another. In a developing embryo, for example, cells in the three germ layers have to arrange themselves spatially so that the cells that will become skin are on the outside.
Similarly, as a cancerous tumor expands, the cells proliferate and push others aside. It is known that cells accomplish these movements through internal cytoskeletal rearrangements that allow them to extend, retract, and divide. Scientists Discover Solar Powered Hornets - GoodCleanTech. The oriental hornet is more active during the day, and tends to become even more active as the temperature rises. And now scientists have discovered the reason: the hornets are solar powered. It turns out that the distinctive yellow stripe on the hornet's abdomen is actually full of tiny protrusions that gather sunlight and harness it for energy. The insect also features a special pigment, called xanthopterin, that helps with the process. "Xanthopterin works as a light harvesting molecule transforming light into electrical energy," Dr Marian Plotkin told the BBC.
Wasps and hornets tend to be more active during the morning, and this new research explains why the oriental hornet is different: it stays out during the day because there's more sun. Download Graphic Images from the Hillis/Bull Lab. Return to "Download Files" Page You are welcome to download the following graphic image of the Tree of Life for non-commercial, educational purposes: Tree of Life (~3,000 species, based on rRNA sequences) (pdf, 368 KB) (see Science, 2003, 300:1692-1697) This file can be printed as a wall poster.
Printing at least 54" wide is recommended. Tree of Life tattoo, courtesy of Clare D'Alberto, who is working on her Ph.D. in biology at the University of Melbourne. The organisms depicted in this tattoo are (starting at 4 o'clock and going around clockwise): (1) a cyanobacterium (Anabaena); (2) a radiolarian (Acantharea); (3) a dinoflagellate (Ceratium); (4) an angiosperm (Spider Orchid); (5) a couple species of fungi (Penicillium and a yeast); (6) a ctenophore (comb jelly); (7) a mollusc (nudibranch); (8) an echinoderm (brittle star); and (9) a vertebrate (Weedy Sea Dragon).