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Tag: "with" at biology news

Bigger horns equal better genes

...ve shown that greater genetic diversity correlates with a greater chance of survival. "The size of the...s the idea that, because natural selection weakens with age, genetic mutations have effects that accumulate over time. Therefore, differences in genetic qua...

How to lose weight and not go hungry: HU researcher develops drug that mimics feeling of 'fullness'

...ebrew University of Jerusalem feels he has come up with a practical weight loss solution for the obese per...hus leading to natural weight loss. In experiments with mice, it was shown that a single oral administration of BL-3020 led to reduced consumption over a pe...

Envisat captures first image of Sargassum from space

... Sargassum," Gower said. "It is usually associated with the area of the North Atlantic known as the Sargas... Gower and King are now combining data from MERIS with a sophisticated processing algorithm and powerful Grid computing to broaden this new view. The basic...

Dirty snow may warm Arctic as much as greenhouse gases

...of warming by dirty snow varied from year to year, with higher temperatures in years with many forest fires. Greenhouse gases, which trap outgoing energy, are primarily responsible for the r...

Largest synthetic gene ever built offers insights into anti-malarial drug resistance

...the journal Biochemistry, the researchers say that with the addition of the recreated gene, PfMDR1 and its...ell as the Department of Chemistry. Any animal with red blood cells can develop malaria, which is caused by a single-cell protozoan parasite transmitted...

Loss of stem cells correlates with premature aging in animal study

...apidly divide and are able to replenish the tissue with new cells. Brown explains that in the current ...ssentially, these mice start their young adulthood with two strikes against them in terms of long-term tissue maintenance, and so, they subsequently age bef...

Pesticides choke pathway for nature to produce nitrogen for crops

...f Oregon, has shown that many pesticides interfere with the ability of legumes to recruit soil bacteria ne... years of research both in the test tube and, now, with real plants, a team of scientists reports that artificial chemicals in pesticides – through applicat...

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

...highest proportion of amphibian species threatened with extinction. Hedges and coauthor William Duellman,... species and timing the divergences of the species with molecular-clock methods. "Molecular clocks work by counting the number of DNA-sequence mutations se...

New bacterium discovered -- related to cause of trench fever

...etic detective work revealed that she was infected with a new bacterium that had never before been isolate... A UCSF infectious disease team, in collaboration with colleagues from other institutions, found that the new microbe is genetically similar to one spread ...

Study shows big power of small RNAs, not just proteins, in halting cancer

...formation. By comparing levels of miRNAs in cells with a variety of pre-cancerous genetic lesions, CSHL researchers found a connection between changes in the p53 pathway and the loss of a specific family of miRNAs, known as miR-34. The fact that p53 uses miRNAs to stop tumor cell growth reveals a comple...

Studies to find better ways to preserve human eggs, ovarian tissue under way

...an-like cow ovarian tissue and eggs. They start with reproductive tissues because young women with cancer produce a compelling need and are a good model for other tissues and organs. “What we tell...

Millions of children denied drug that costs less than $3 a year

Millions of children with epilepsy in developing countries are being denied ... is available for all. Of the 35 million people with epilepsy who live in developing countries, around 85% receive no treatment at all. As a result, they...

In mice, drug protects against diabetes and atherosclerosis

Blocking a single protein with an experimental drug prevented and treated both ty... development of asthma, another disease associated with obesity. In this new paper, researchers from HSPH, Bristol-Myers Squibb, and elsewhere describe h...

Columbine flowers develop long nectar spurs in response to pollinators

...in flowers, said Hodges. "In Darwin's race, plants with the longest spurs and pollinators with the longest tongues [to tap the flowers' nectar] would be favored by natural selection, and--in a ne...

Longer treatment benefits sleep apnea patients

WHAT: Adults with obstructive sleep apnea benefit significantly from...in the United States and Canada studied 149 adults with sleep apnea to determine how long they routinely used CPAP each night. In addition, patients were ev...

Ancient DNA traces the woolly mammoth's disappearance

...d one of two lineages died out. “In combination with the results on other species, a picture is emergin...inal populations that were left.” Barnes, along with Dr. Adrian Lister of the University College London and the Natural History Museum in London and othe...

New study finds genetically engineered crops could play a role in sustainable agriculture

...l over the world, involving corn and cotton plants with a Bt gene inserted for its insecticidal properties... ladybird beetles, earthworms, and bees in locales with “Bt crops” fared better in field trials than those within locales treated with chemical insecticides...

Newly found sensing system enables certain bacteria to resist human immune defenses

...d into two types, gram-positive and gram-negative, with the primary difference being the nature of the bac...uman health, especially due to increasing problems with drug resistance, and these findings may help chart a path to designing new drugs to bolster our anti...

Brightening prospects of using fluorescent nanotubes in medical applications

...duce populations containing trillions of nanotubes with a quantum efficiency of 1 percent, a factor of 100...nsoluble in water. So researchers routinely mix it with special soap and give it a dose of ultrasound to break apart clumps of nanotubes and force them to d...

Research shows cord blood comparable to matched bone marrow

...which is currently considered the preferred graft, with matched and mismatched umbilical cord blood. There...nts who received unrelated bone marrow transplants with those who received umbilical cord transplants. While all bone marrow donors were matched, nearly all...

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