Brightsurf Science News & Current Events

March 21, 2001
Deleting gene changes sex of mice
Scientists have identified the first growth factor linked to sex determination.

NASA image reveals giant crack in Antarctic ice
There appears to be a new crack in the Antarctic's icy armor.

UNC study ties depression, anxiety to fatigue in HIV-positive patients
One of the most difficult and frustrating problems for people who test positive for HIV, the virus that causes AIDS, is fatigue, but often doctors can't recommend much more to patients than getting additional rest.

New materials hold promise for human healing applications
Purdue University researchers have discovered new materials that offer promise in repairing and replacing damaged human tissues in parts of the body ranging from intestines to vocal cords.

Federal government makes final call for data, public comment before writing new report on cancer-causing substances
Do estrogens, wood dust, a common solvent called trichloroethylene, the flavoring methyleugenol and the antibiotic chloramphenicol cause human cancer under some circumstances?

Arctic submarine uncovers evidence of giant, ancient ice sheets
A submarine expedition to the Arctic found footprints of ancient floating ice sheets -- possibly the largest masses of ice ever to cover the earth's oceans.

Depression doubles heart attack risk in hypertensive patients
Hypertensive patients with a history of depression are more than twice as likely to have a heart attack or other coronary event than non-depressed people with high blood pressure.

First genetic evidence that animals use corridors
While it makes intuitive sense that corridors would benefit wildlife living in fragmented habitats, the evidence that animals actually use corridors is limited and ambiguous.

Human trials of new vaccine technique prove promising for allergy sufferers
For years, efforts to develop improved vaccines for asthma and allergies have been thwarted because the vaccines themselves often cause the very symptoms a person is trying to avoid.

Roadsides may provide butterfly corridors
Iowa has among the highest road density nationwide and, in a conservation twist, this may actually benefit some kinds of wildlife.

Polymer research could lead to better protective clothing
Scientists at North Carolina State University have found new ways to make protective fabrics - such as those used in flame-retardant children's clothing or odor-inhibiting socks and shirts - last longer and work better.

Pain tolerance and sensitivity differ for African Americans and Caucasians
African Americans report higher levels of chronic pain and a greater sensitivity to acute pain than whites, suggesting a possible reason why previous studies have shown that African Americans tend to receive inadequate treatment for their pain.

Anger and depression predict artery-hardening risks, behavior
Depression and anger are associated with hardening of the arteries in women, in part, through physical and behavioral risk factors such as bad cholesterol levels, obesity and smoking.

Brain image database benefits research and education worldwide
Brain scans are an important tool for medical science, basic research and education, but this expensive technology is often out of reach for many institutions.

The Journal of Cell Biology makes content available for free after six months; Calls for a modification of boycott effort
The Journal of Cell Biology (JCB), a research journal published by the non-profit Rockefeller University Press, announced today that it has made its content available for free on its web site (
Latest farm product: Meadowbirds
The conventional way of protecting meadowbirds in The Netherlands is to pay farmers for setting aside the best breeding areas.

Effective psychological treatment improves outcome in heart attack patients
Psychological treatment can improve recovery from a heart attack, according to a reanalysis of data from the large Montreal Heart Attack Readjustment Trial, which was originally interpreted as placing in doubt the benefits of such treatments.

Emotional well-being may lower risk of stroke
Measures of emotional well-being are associated with a dramatic decrease in stroke incidence.

Univ. of Fla. study: Sports participation has mental perks for all
In a survey involving nearly 13,000 people -- one of the largest studies of its kind -- University of Florida researchers have found that athletes have better images of their own bodies than do nonathletes, regardless of sport, gender or expertise.

Hotspots no panacea
Protecting endangered species hotspots is touted as a simple, efficient way of conserving as many at-risk plants and animals as possible.

Two magnets are cheaper than one: Stanford engineers construct an inexpensive MRI scanner
Stanford electrical engineers built a low-cost magnetic resonance imaging (MRI) scanner.

The anatomy of a housing boom
An ESRC-funded research team, from Edinburgh University and the School of Planning and Housing at Edinburgh College of Art, studied house-buyers in four areas of Edinburgh.

University of Florida researchers study possible genetic link to dysfunctional coronary arteries in women
Cardiologists have spent decades puzzling over what causes chest pain in many of their female patients. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to