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Tag: "rate" at biology news

Soils offer new hope as carbon sink

... one case, tripled crop growth when applied at the rate of 10 tonnes per hectare. Agrichar is a black c...aid agrichar raised soil pH at about one-third the rate of lime, lifted calcium levels and reduced aluminium toxicity on the red ferrosol soils of the trial...

Cigarette smoke alters DNA in sperm, genetic damage could pass to offspring

...authors. Yauk and her colleagues found that the rate of Ms6-hm mutations in the smoking mice were 1.4 times higher than that of non-smoking mice at six weeks, and 1.7 times that of non-smoking mice at 12 weeks. “This suggests that damage is related to the duration of exposure, so the longer you smoke t...

The insect vector always bites twice

...hese diseases in a given region. In Senegal the rate of antisalivary antibodies against Anopheles in yo...t intense transmission, in September. The antibody rate proved also to be associated with the risk of occurrence of a malarial attack in the following three...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...g two species and then dividing that number by the rate of change, which is established with the help of fossils and geologic information," explained Hedges. The study's DNA research revealed that, while many ocean dispersals may have occurred over time, only two led to the current faunas: one for the ...

Research shows cord blood comparable to matched bone marrow

...atched cord blood had a 20 percent higher survival rate than matched bone marrow recipients, though the number of matched cord blood transplants was small. The research appears in the June 9, 2007, issue of The Lancet with John E. Wagner, M.D., professor of Pediatrics and director of the University of...

U-M researchers discover gene switched off in cancer can be turned on

...t lung cancer is particularly crucial as the death rate from lung cancer has not changed in 30 years. Newer treatments are much less toxic and extend lives by months, but the same people who died from lung cancer 30 years ago, would still succumb to this disease today. Targeted therapies have dramatica...

Risk of stroke doubles if diagnosed with Type 2 diabetes

...ment for Type 2 diabetes and more than doubles the rate of occurrence. For this study, the researchers entered 12,272 subjects into a Type 2 diabetes cohort. All subjects were recently diagnosed with Type 2 diabetes and had a mean age of 64 years. After five years of monitoring, stroke incidence rates we...

University of Pittsburgh School of Medicine researchers develop 'off-the-shelf' vascular grafts

...tructs showed a significantly higher blockage-free rate than unseeded controls (55 percent versus 0 percent). In addition, at eight weeks, there was an extensive remodeling of the MDSC-seeded polymer by surrounding tissue, exhibiting tissue formation that is consistent with a mature artery. According t...

Weizmann Institute scientists develop a general 'control switch' for protein activity

... these applications – strengthening or slowing the rate of protein activity in an immediate and reversible manner – can be of great value....

Smoking rate has plummeted in New York City

New York City’s smoking rate has plummeted since a comprehensive program agains...idity and Mortality Weekly Report (MMWR). The 2006 rate was nearly 20% lower than the 2002 rate -- a decline that represents 240,000 fewer smokers. The City...

Experts predict Tamiflu could halve the pandemic influenza death toll versus no intervention

...hool closures further reduces the attack and death rate and provides a health benefit at a reasonable cost. The research also showed that pre-pandemic vaccination programmes would play an important role but their effectiveness would be dependent upon how well the vaccine was matched to the virus.1 “The...

New research shows sharks use their noses and bodies to locate smells

... increased search time, but did not affect success rate or plume preference. However, lesioned animals no longer discriminated between sources of turbulent and oozing odor. In the dark, search time of lesioned animals further increased, and the few animals that located any of the targets did not discrimin...

An 'elegant' idea proves its worth 25 years later

...levels were normal. The patients’ overall survival rate was 84 percent, and 96 percent survived episodes of severe ammonia poisoning. An estimated one in 40,000 live births is a child with a urea cycle disorder, according to Hamosh, who says early and accurate detection can now assure prompt treatment...

Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

...te biogeographic region that has an extremely high rate of endemism among its marine organisms, continues to yield a wealth of never-before-described marine animals to visiting scientists at the Smithsonian Tropical Research Institute in Panama. Alicia Hermosillo, researcher at the Universidad de Guadalaj...

Arctic ice retreating more quickly than computer models project

...rctic sea ice is melting at a significantly faster rate than projected by even the most advanced computer ... percent per decade from 1953 to 2006. The fastest rate of September retreat in any individual model was 5.4 percent per decade. (September marks the yearly...

Resistant HIV quickly hides in infants' cells

... and following birth. In the last few decades the rate of mother-to-child transmission of HIV in the Unit...es has been reduced from 25 percent to its current rate of less than 2 percent. However, the transmission of drug-resistant strains of HIV from mother to c...

Peramivir protects mice from lethal H5N1 infection

...ng, brain and spleen. The key to the high survival rate was treating the infected mice within 24 hours aft..., while two intramuscular injections increased the rate to 60 percent. The single intramuscular injection did not completely inhibit H5N1 virus replication ...

Amphibians in losing race with environmental change

...d by their inability to keep pace with the current rate of global change, a new study suggests. The basic... can't keep up." It has been estimated that the rate of plant and animal extinction is greater now than any known in the last 100,000 years, the research...

Climate change impacts stream life

...lear." The study predicts that at the present rate the springtime abundance of macroinvertebrates in streams could decline by as much as 21 per cent for every 1 degree Celsius rise in temperature. Dr Durance added "The numbers of species in the streams we examined might also fall by 12-25 per cen...

Maggots rid patients of MRSA

...ering from MRSA-contaminated foot ulcers, with the rate doubling in a three year period, possibly due to overuse of antibiotics and the selection of broad rather than narrow-spectrum antibacterial agents. This led to their first study, funded by Central Manchester and Manchester Children's University Hosp...

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