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Tag: "coat" at biology news

Tiny particles could solve billion-dollar problem

...onsists of a gold nanoparticle covered with a thin coat of palladium atoms. As metal particles get progressively smaller, a higher percentage of the atoms in the particle are found on the surface of the particle instead of being locked away inside the metal where they cannot interact with other chemicals...

UCLA scientists transform HIV into cancer-seeking missile

.... Second, the scientists stripped off HIV's viral coat and redressed it in the outer suit of the Sindbis virus, which normally infects insects and birds. By altering the Sindbis coat, they reprogrammed the AIDS virus, which ordinarily infects T-cells, to hunt down and attach to P-glycoproteins -- molecul...

New Insights Into HIV Immunity Suggest Alternative Approach to Vaccines

...because certain proteins on HIV's protective outer coat trigger only short-lived, self-reactive antibodies...ne system because these seemingly vulnerable outer coat proteins activate self-reactive antibodies. "The fundamental problem in all of HIV vaccine research...

Hirsute Or Hairless? Two Proteins May Spell The Difference

...t nu, would quickly succumb in the wild—its winter coat consists of little more than a ridge of fur down the midback and tail—and needs special care to thrive as a pet. Hairless animals in the lab, on the other hand, can be very instructive. Understanding how hair develops sheds light on the fundamental p...

Molecule that usually protects infection-fighting cells may cause plaque deposits inside arteries

...cells might also contribute to fatty buildups that coat arteries and lead to heart disease, UT Southwestern Medical Center researchers have found. The molecule, called apoptosis inhibitor of macrophage or AIM, inhibits cell death in macrophages, which circulate in the bloodstream and help the body fend o...

To control germs, scientists deploy tiny agents provocateurs

... harmful and beneficial. In one role, biofilms can coat plant roots and symbiotically aid ecological processes such as nitrogen fixation. But at the darker end of the scale, biofilms can form infection-inducing layers on implanted medical devices and cause deadly lung infections in cystic fibrosis patient...

A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years

...peratures frequently drop below freezing; its long coat is probably an adaptation to the cold. The taxonomic name of the species, Lophocebus kipunji, recognizes the monkey’s local Kinyakyusa name (pronounced kip-oon-jee) used by a few hunters around Mt. Rungwe. The highland mangabey is extremely rare and ...

Purdue researchers use enzyme to clip 'DNA wires'

...aduate student Dorjderem Nyamjav were the first to coat DNA with magnetic particles two years ago. Kinsella and Ivanisevic are the first to show that the BamH1 enzyme cuts DNA wires. "We weren't sure the enzyme would be able to recognize the DNA sequence covered with particles," Kinsella said. "We though...

Deep thinking: Scientists sequence a cold-loving marine microbe

...nty of extracellular polysaccharides (sugars) that coat cell membranes. Aside from its cellular outerwear, C. psychrerythraea generates a range of potential cold-protective compounds. One example is a family of polyesters, known as polyhydroxyalkanoate (PHA) compounds, that may also boost reserves of nit...

Can our genes tell the story of our divergence?

...illion to 6 million years ago, we shed our hirsute coat and heavy brow, mastered bipedal locomotion, and acquired a knack for abstract thought while our next of kin learned to use tools, and developed the skills to construct tree-bound nests high above the forest floor. We differ by just a tad over 1% at ...

Gene therapy advance treats hemophilia in mouse models

...es in the mice, the team took the disabled protein coat from the baculovirus Autographa californica and pu...n the liver cells because the modified baculovirus coat serves as a "key" that fits into the "lock," or receptor. The percentage of liver cells that took up...

Duke Experiments Boost Radiation's Cancer-Killing Effects

...that therapy, said Moeller. "Just as putting on a coat and gloves in the middle of summer would yield no benefit and could actually cause harm, blocking HIF-1 at the wrong time and place produces no benefit," said Moeller. "But blocking HIF-1 in the right environment can dramatically inhibit the growth o...

IBM Transforms the Art of Scientific Expeditions

...that therapy, said Moeller. "Just as putting on a coat and gloves in the middle of summer would yield no benefit and could actually cause harm, blocking HIF-1 at the wrong time and place produces no benefit," said Moeller. "But blocking HIF-1 in the right environment can dramatically inhibit the growth o...

Quantum dots provide a faster, more sensitive method for detecting respiratory viral infections

...olecular structures that are unique to the virus's coat and the cells that it infects. In a paper appearin...SV virus infects lung cells, it leaves part of its coat on the cell's surface. Quantum dots have been linked to antibodies keyed to structures unique to RSV...

New technique could alter field of mouse genetics

...fluorescent protein and an enzyme that changes the coat color of a white mouse to grey or black. The transposon acts as a genetic beacon, so researchers can easily track its location without having to sequence the entire genome, as can happen with the chemical mutagen technique. In three months, the two ...

Drug resistant avian influenza viruses more common in Southeast Asia than North America

...smembrane domain-the part of M2 located within the coat of the influenza virus. The M2 protein is an ion ...his influx of protons allows the virus to shed its coat after it enters a cell-an essential step in the replication of the virus. Amantadine inhibits the fu...

Scientists develop nanotech-laser treatment that kills cancer cells without harming healthy tissue

...itamin known as folate. The researchers decided to coat the nanotubes with folate molecules, which would only be attracted to diseased cells with folate receptors. The experiment worked as predicted. Most of the folate-coated nanotubes ended up inside cancer cells, bypassing the normal cells--like Trojan...

Scientists seek to unwrap the sweet mystery of the sugar coat on bacteria

...atterns of glowing dots and determine which sugars coat the bacteria. The microarray technique worked fast enough that the researchers were able to see the sugar coating change over time in the neonatal meningitis strain of E. coli. "Over time, the lectins lost their ability to see these bacteria," says...

Wrinkled membranes create novel drug-delivery system

...b and colleagues at Illinois are exploring ways to coat the capsules with the nanoparticles. When exposed to a magnetic field, the nanoparticles would cool down and remove heat from the capsules. The capsules would then wrinkle and release the drug. ...

Outsmarting the smartie bug

...nvolved. The polysaccharide capsule forms a sugary coat around the bacterium and changing the structure of...hanging its colour. "The bug has a polysaccharide coat which can take any one of 90 different forms, known as serotypes," said Stephen Bentley, leader of t...

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