Tag: "hairs" at biology news
Single isolated mouse skin cell can generate into variety of epidermal tissues
...entification of signals that are necessary to make hairs
grow, and the earlier isolation and characterization of cells from a region of the hair follicle that researchers in the field thought might be the home of these stem cells. Because they are so powerful, and so few in number, stem cells are used spar...
Genuine stem cells found in skin might treat hair loss, wounds
...llicles of the skin retain the ability to form new hairs
as well as skin, new research reported in the September 3 issue of Cell confirms. While earlier work had suggested the presence of stem cells in skin, the new study by Howard Hughes Medical Institute investigators at Rockefeller University in New Yor...
Antibiotics alter GI tract microbes and increase lung sensitivity to allergens
...ale, air flows past mucus-producing cells and tiny hairs
designed to trap bits of pollen, dust and spores before they enter the lungs. These trapped particles are swept into the stomach with saliva and mucus as you swallow. "Anything you inhale, you also swallow," Huffnagle says. "So the immune cells in y...
Nanoscale contact optimizes adhesion
...so available in German . The nanometer size of hairs
(spatulae) on the feet of geckos and many insects ...al shape of the contact surface of the tip of such hairs
which gives rise to optimal adhesion to a substrate via molecular interaction forces. For macroscopi...
Spiders make best ever Post-it notes
...pictures available see notes). There is a tuft of hairs
on the bottom of the spider's leg, and each individual hair is covered in more hairs. These smaller hairs
are called setules, and they are what makes the spider stick. The paper reveals that the force thes...
USC researchers produce a hairier mouse
...ic mice were transformed into follicles with small hairs
"pointing inwards toward the cornea," Chuong expla...en the environment changes. For instance, too many hairs
on a human would be considered abnormal. But when it occurred in the mammoth thirty thousand years a...
Twitching whiskers tell all
...ain. Tracking these cells' responses while whisker hairs
actively swept over objects, they saw that two basic types of neurons came into play. The first, which they call whisking neurons, respond solely to the whisking motion itself, regardless of whether the whiskers touch an object or not. The second ty...
Scientists believe ancient arachnids may have spun silk like modern spiders
...bumps could be cleaning structures, or specialized hairs
that triggered fight-or-flight responses. I want to be clear that these microtubercle rows are not conclusive evidence of silk-spinning in trigonotarbids, Easterday cautioned. But the evidence is very intriguing. Ohio State University scientists repo...
Chicken embryo research tunes into inner ear
...would have ordinarily. Instead of forming the tiny hairs
that the inner ear uses to detect sound waves, the...m cells matured into tissue with different kind of hairs
- the sort used to keep balance. This ability to guide the choice of cell types could expand researc...
Splitting hairs: GATA-3 function in hair follicle development
... nothing more than short stubble. Furthermore, the hairs
that did finally emerge were short, thick, and had an irregular cuticle pattern (see photo from electron microscopist, Dr. Amalia Pasolli). "These studies bring us one step closer to understanding the key components that go into making a hair follic...
Development of hair depends on development of the hair channel
..., the hair shaft of the grafted skin was affected: hairs
grew abnormally short and thick. According to the researchers, these hair shaft irregularities were caused by both faulty hair channels as well as internal disruptions. "We found that some of the genes in the hair shaft were misexpressed, which impl...
The science of summer haircuts
...g tidbits about hair: --Blondes tend to have more hairs
per unit area, with redheads having the least, and other hair colors in the middle, Tobin says. --Does hair grow faster during the day than in the night? "There is evidence," Philpott says, "that hair growth follows a circadian [24-hour] rhythm. We...
The mechanical switch in the ear
...are called sensory hair cells because of a tuft of hairs
or specialized processes present at the top of the cell. When sound or movement causes the hairs
to shear or deflect, ions flow into the cells, thereby transducing the mechanical energy into electr...
A closer look yields new clues to why bacteria stick to things
...al forces are the cause of stickiness. The charged hairs
may have another purpose. "If you're a bacterium i... stuck. Or, in a different arrangement the charged hairs
would scrunch up, flattening the brush and allowing the bacterium to be carried away. Developing a m...
Ann Arbor chemist wins national award for extracting sulfur from fuel
...emical engineer at the University of Michigan. The hairs
insert so close to a surface that their molecules actually attract each other in a brief defiance of gravity. But why study adsorption as a separation technique? "Over 90 percent of separations in the industry are done by distillation," or selectivel...
Field Museum uncovers evidence behind man-eating; revises legend of its infamous man-eating lions
... the last meals of the man-eaters. They discovered hairs
from the prey of the lions, still embedded in thei...r careers. Although the study is ongoing, no human hairs
have been recovered amid the hundreds of hairs
reviewed to date. While broken limbs are certainly d...
Evidence for orangutan culture
...fruit called neesia, thereby avoiding the stinging hairs
that surround the seeds. Significantly, such tool use was present only among some groups, even when the habitat appeared to be the same, the researchers found. For instance, they found that while orangutans on one side of a barrier river used tools ...
USC scientists uncover secrets of feather formation
...he morphogenesis of various epithelial organs-from hairs
to lung tissue to mammary glands-and is already shedding light on the controversy over the evolution of dinosaur scales into avian feathers. A paper describing this work, "The Morphogenesis of Feathers", authored by principal investigator and Keck Sc...
Scientists prove how geckos stick, unlock secrets to making artificial gecko glue
...the puzzle of how geckos use millions of tiny foot hairs
to adhere to even molecularly smooth surfaces such...erial. Geckos have millions of setae--microscopic hairs
on the bottom of their feet. These tiny setae are only as long as two diameters of a human hair. Tha...
Minneapolis chemist wins national award for unique separations
... Muggins, the membrane came as thousands of hollow hairs
through which water flowed while oxygen seeped out, was collected and then delivered to a sealed box. Inside the box was Muggins, whose scientific bent was apparently surpassed by the urge to take a nap. The experiment worked so well that Cussler had...
1 2 3