Earth

AUGUSTA, Ga. (Aug. 13, 2018) - Higher levels of oxidative stress in males results in lower levels of a cofactor needed to make the powerful blood vessel dilator nitric oxide, researchers report.

An antioxidant appears to help level the playing field between males and females of the cofactor BH? deep inside the kidneys - where the fine-tuning of our blood pressure happens - and restore similar production levels of protective nitric oxide.

Men respond to their spouse's illness just as much as women do and as a result are better caregivers in later life than previous research suggests, according to a new Oxford University collaboration.

Ecological surveys of biodiversity provide fundamental baseline information on species occurrence and the health of an ecosystem, but can require significant labor and taxonomic expertise to conduct. However, as the cost of high-throughput DNA sequencing has plummeted in recent years, DNA from environmental samples (eDNA) has emerged as a cost-effective source of biodiversity data. In research reported in a recent issue of Applications in Plant Sciences, Dr.

Globally, biodiversity is concentrated around the equator, but the scientific institutions generating DNA sequence data to study that biodiversity tend to be clustered in developed countries toward the poles. However, the rapidly decreasing cost of DNA sequencing has the potential to change this dynamic and create a more equitable global distribution of genetic research. In research published in a recent issue of Applications in Plant Sciences, Dr.

Aug.10, 2018--More than 4 in 10 women with asthma may go on to develop chronic obstructive pulmonary disease (COPD), according to a study conducted in Ontario, Canada, and published online in the Annals of the American Thoracic Society.

ATLANTA - The American College of Rheumatology (ACR) today expressed its extreme disappointment with a new Centers for Medicare and Medicaid Services (CMS) decision to allow Medicare Advantage (MA) plans to implement step therapy for Part B drugs and cross-manage Part B and D drug utilization. The policy change threatens patient access to drugs covered under Medicare Part B for the 54 million Americans living with rheumatic diseases. This policy puts insurance companies in control of patient treatment plans.

Historic levels of particles in the atmosphere released from pre-industrial era fires, and their cooling effect on the planet, may have been significantly underestimated according to a new study.

Fires cause large amounts of tiny particles, known as aerosols, to be released into the atmosphere. These aerosols, such as the soot in smoke or chemicals released by burning trees, can cool the planet by reflecting sunlight back into space and increasing cloud brightness.

A new study shows that men only have to believe they've bested another man in competition to get raised testosterone levels and an inflated sense of their own value as a sexual prospect.

Scientists found that this hormonal and psychological shift made men more inclined to approach new potential partners.

The research team measured hormone levels, as well as self-perceived attractiveness and confidence in approaching women, in 38 men in their twenties before and after competing in head-to-head battles on rowing machines.

Why does the egg size of house sparrows vary so much? Isn't it always an advantage to be big?

Perhaps not surprisingly, baby sparrows that hatch from large eggs are consistently bigger their small egg counterparts. They can store up more reserves if food becomes scarce. So you would think that it's always a good idea to lay big eggs because your offspring would seem to have a greater chance of survival.

But what really set research biologists to wondering is that the difference in volume from the smallest to the largest egg can vary by 50 per cent.

LOGAN, UTAH, USA- Climate and land-use change are shrinking natural wildlife habitats around the world. Yet despite their importance to rural economies and natural ecosystems, remarkably little is known about the geographic distribution of most wild species - especially those that migrate seasonally over large areas. By combining NASA satellite imagery with wildlife surveys conducted by state natural resources agencies, a team of researchers at Utah State University and the University of Maryland, and the U.S.