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Tag: "pressure" at biology news

Bioartificial kidney under study at MCG

...te red blood cell production, play a role in blood pressure regulation and clear and metabolize cytokines that...eys can become ischemic and begin to fail if blood pressure drops because of a long surgery with significant blood loss. Infection can further reduce blood flow...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...istine, today the ecosystem is under unprecedented pressure from economic development, alterations of its water courses and conversion to other land uses." "Moreover, global climate change poses great environmental threats to wetlands," according to the analysis, "fundamentally altering their ecology, biodiv...

Scientists discover how fish evolved to float at different sea depths

... swimbladder inflated with gas even at great water pressure in the depths of the sea. The mechanism comprises of a complex system of arteries and veins, called the rete mirabile, and special blood proteins, which can release oxygen even at high oxygen concentrations. These systems drive oxygen from the blood...

Vascular structure and function improve with diet and exercise

...seling included 38 patients with high-normal blood pressure (systolic greater than 130 mmHg to 139 mmHg, diast...d. "It was not a weight reduction program." Blood pressure did not change significantly. Ultrasound measurements of the heart and blood vessels at rest were p...

Discovery may lead to better Candidiasis drug

...to, and out of, cells. Ions regulate electrostatic pressure between the cells' internal and external environments, which, in turn, regulates their volume and water content. Cells that lose their water content without being able to regulate its re-uptake die rapidly, Edgerton said. "Now that the target for hi...

NASA study finds snow melt causes large ocean plant blooms

...led to greater differences in both temperature and pressure systems between the Indian subcontinent and the Arabian Sea. The pressure differences generate monsoon winds that mix the ocean water in the Western Arabian Sea. This mixing ...

Biologists discover why 10% of Europeans are safe from HIV

...monstrated how this disease provided the selection pressure that forced up the frequency of the mutation from ... haemorrhagic plague provided continuing selection pressure on the CCR5-delta32 mutation and explains why it occurs today at its highest frequency in Scandinavi...

First North American Encapsulated Islet Transplant without Long-term Immune Suppression into a Patient with Type 1 Diabetes

...monstrated how this disease provided the selection pressure that forced up the frequency of the mutation from ... haemorrhagic plague provided continuing selection pressure on the CCR5-delta32 mutation and explains why it occurs today at its highest frequency in Scandinavi...

Advancements In Genomics Foster Deep Sea Discoveries

...ndered, could withstand the dark, cold and extreme pressure of such an environment? Researchers at Scripps In...re, for the most part, doesn’t vary very much, but pressure as they move up and down the water column can. They sense that pressure.?/p> The overwhelming ma...

Basis for DNA ejection from single phage particles

...oposed in the past to occur through the release of pressure accumulated within the viral particle itself. Alm...rly defined. It was hypothesized that the internal pressure built during packaging of the DNA in the phage capsid was responsible for DNA ejection. This pressur...

Improved statistical tools reveal many linked loci

...n contributes to the observed trait, such as blood pressure or cell growth. The new statistical method bypasses the previously overwhelming computations needed to puzzle together the myriad elements that influence gene expression throughout an entire genome. And unlike earlier approaches to understanding how...

Morphine for Chest Pain Increases Death Risk

... effects of depressing respiration, reducing blood pressure and slowing heart rate," he continued. "These side effects could explain the worse outcomes in patients whose heart function has already been compromised by disease." For their analysis, the researchers consulted the nationwide quality improvement i...

Study Finds Moderate Hypothermia A Safe Treatment For Traumatic Brain Injury In Kids

... to maintain target temperature, mean intracranial pressure (ICP), and percent time of ICP less than 20 mm Hg during the cooling and subsequent rewarming phases. Additionally, assessments of neurocognitive outcomes were obtained at three and six months of follow-up. Researchers will conduct further studies to...

Going To Extremes To Improve Human Health

...dies how estrogen and progesterone influence blood pressure regulation. Minson is the winner of a 2005 American Physiology Society's Outstanding Young Investigator Award (his second since 2000) and a similar national honor conferred in 2000 by the American College of Sports Medicine. In addition to their we...

Insects develop resistance to engineered crops

...n one line of defense starts to fail, it puts more pressure on the second toxin in a pyramided plant to control the insect," Shelton added. While single-gene Bt plants are most prevalent, industry trends suggest that pyramided plants may be favored in the future. In Australia, the use of single-gene Bt cotto...

Size matters: Preventing large mammal extinction

...ey are exposed. Larger mammals have the additional pressure of biological disadvantages such as long gestation period and late weaning age to contend with, significantly increasing their susceptibility to extinction. "In a world dominated by people, being big is substantially more of a disadvantage than we r...

Siberian tigers hang tough

...d the greatest stronghold for tigers, is now under pressure after recent reports of tigers completely disappearing from some of their core tiger reserves. Yuri Darman, Director of the WWF Russian Far East Office, declared, "these results are a tribute to the hard work and dedication of conservation organizati...

Doctors should stop prescribing antibiotics for the common cold, review advises

...nfections, which do occur. Some may be yielding to pressure from patients." But he says "this practice is on the decline as the public becomes more sophisticated about health issues." Dr. Arroll says that patients are not doing themselves any favors looking for a "quick fix" in pressuring their providers to ...

New type of rejection blocker protects kidneys after transplant

...jection drugs, including kidney damage, high blood pressure and high cholesterol. In the August 25 issue of T...able total cholesterol levels and comparable blood pressure levels at 12 months. However, 53 percent of cyclosporine patients required lipid-lowering medication...

Millennium Ecosystem Assessment: Many of 2 billion dryland dwellers at risk as land degrades

...on are the main drivers that lead to unsustainable pressure on dryland ecosystems," he says. Adds co-author U... quality. The lesson is that increasing population pressure not accompanied by management practices compatible with the new population size, is the cause of deg...

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