Tag: "hair" at biology news
UB biophysicists discover high-speed motility in cells in response to voltage changes
...ighly specialized cells such as the cochlear outer hair
cells responsible for hearing. In addition to providing new, basic information on how cells function, the finding calls into question the accepted purpose of the so-called "motor protein" prestin, which was thought to be essential for outer-hair-ce...
Research: U.S. boys also reaching puberty earlier than in past years
...st signs of puberty in boys -- appearance of pubic hair
and growth of the testes gathered through the fede... 3.3 percent of Mexican-American boys showed pubic hair
development, she said. Like genital growth, pubic hair
development results from the natural, genetic...
Breast cancer is multi-step, multi-cell type process
...s in width - roughly one-tenth the size of a human hair
-- acts as a "knife"- enabling researchers to isolate cancerous cells from normal cells, and to separate epithelial cells from stromal cells. "Before LCM, the study of cancer genetics entailed grinding up a lump of tumor comprising a mixture of cell...
Cancer-detecting microchip - a micromachined cantilever - is sensitive assay for prostate cancer and potentially other diseases, researchers report
...tilever - essentially a diving board the size of a hair
- is sensitive enough to serve as a diagnostic ass... about 50 microns wide - half the width of a human hair
- 200 microns long (a fifth of a millimeter) and half a micron thick. When molecules bind to the sur...
New study shows oral contraceptive may be effective in treating severe form of premenstrual syndrome
...e effect on mild-to-moderate acne, unwanted facial hair
growth and irritability. Researchers caution that Yasmin may not be appropriate for women with kidney, liver or adrenal disease because it may increase potassium levels. Patients taking drugs that could increase potassium should consult their health-...
NTP plans to look at common viruses, radiation, cooking by-products for new carcinogen report
...nd dishwashing detergents, cosmetics, shampoos and hair
conditioners, as well as in textile processing and other industrial uses. Hepatitis B Virus (HBV), a small DNA-enveloped virus that is transmitted through contact with blood and blood products or other body fluids. Hepatitis C Virus (HCV), an RNA-e...
Washington state researchers receive award for making genetic analysis easier
...rmation used by cells to determine everything from hair
color to disease. DNA probes work like molecular light switches, turning on only when they find DNA that contains a specific gene. Different probes are needed for every gene, and producing probes is often difficult. The Epoch Biosciences team has fou...
New software streamlines the search for disease-causing genes
...l makeup of both people and mice - everything from hair
(or fur) color to susceptibility to disease.It turns out that human and mouse genomes contain roughly the same number of nucleotides 3.1 billion. Digital Disease scans the mouse genome for locations in the DNA where a single nucleotide has been alte...
Research on lead poisoning, hair styling and artists oil paints will be featured at Towson University gathering of worlds largest scientific society
... Baltimore. Highlights include: Effects on human hair
from color products, hair
dryers and sunbathing Safety of consumer products such as fireworks, food and drugs Child lead surve...
Perfume lures flies into trap
... the brain. An electrode placed at the base of the hair
can measure these impulses and thus determine the reaction to an olfactory stimulus. The STW study showed that the majority of olfactory cells react to a variety of smells and that there are only a few specialised olfactory cells that distinguish one...
Gulp! URI professor studies how sharks eat
...o 12 muscles with electrodes as thin as a piece of hair
to determine which muscles are used, a process called electromyography. Wilga also researches how sharks swim. "The old theory was that sharks swim like airplanes fly," says the researcher, who notes that textbooks still state this. The old theory is...
'Silent' DNA speaks up for the first time
...ess by which genes dictate characteristics such as hair
and eye color. "Until now, genes sheathed in heterochromatin were assumed incapable of being expressed due to an absence of trigger proteins," Gross said. "This research shows that these proteins do naturally penetrate the heterochromatin, but ...
UCSD researchers create a home for liver cells on a silicon chip
... within well-like structures no wider than a human hair
whose surface can be chemically modified to mimic the extracellular matrix distribution found in the liver. The porous nature of the silicon bioreactor can be used to promote the flow of nutrients and chemicals through the cell culture, while filter...
Extinction claims a furry friend
...Hornsby was using effective techniques. These were hair
tubes, well known to wildlife researchers, in whic...ion of a single hair. Dr Hornsby used 900 of these hair
tubes in his survey, after trialling them with captiveanimals. "We spent a lot of time developing th...
Faster nanowires may advance nanotechnological applications for detecting glucose, hormones or DNA
...r OPV, are about 50,000 times shorter than a human hair
is wide. The Chidsey lab`s earlier attempts to make nanowires produced a substance called oligophenyleneelthynylene, or OPE, which conducts electricity pretty well for about 3 nanometers (billionths of a meter). For practical applications, though, n...
Disconnect between skin cells implicated in common skin cancer
...mouse embryo developed normally until its skin and hair
begin to develop, around the 14th day of gestation. As these specialized cells, called keratinocytes, developed they did not make adherens junctions. The alpha-catenin needed to anchor the junction was missing. Changes in the skin of the knockout mou...
University of Illinois at Chicago expert tinkers with evolution to create human 'Built-to-Last'
...s prone to detaching after decades of use, fragile hair
cells in our ears leading to hearing loss, and a common passageway for food and air, raising the risk of inhaling food or drink as muscle tone decreases with age. Then, there are what the authors refer to as plumbing problems. In males, these probl...
Scientists identify gene for the leading form of dwarfism
...d because affected people have hair
that is fine, blond, and very brittle, said de la Chapelle. The Ohio State research team is now working to understand whether different mutations of the RMRP gene cause different degrees of...
Pharmaceutical 'smart bomb' targets cancer cells
... effects you see in chemotherapy patients, such as hair
loss, nausea and reduced immunities," said Hu. Instead of hitting all cells that grow fast, the newly reformulated prodrugs use a protein or enzyme as the activating trigger, guaranteeing a direct hit on cancerous cells. Nitroreductase an enzyme no...
Chemists describe "zipper teeth" of DNA molecules -- publish results in the journal Nature
...logical information, including whether we have red hair
or black, blue eyes or brown. The nucleic-acid base pairs, or building blocks of DNA, have been isolated in experiments that are the first to keep pace with the rapidly growing theory of DNA's structure, researchers reported in the Dec. 21 issue of...
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