fewer 2 3

Tag: "fewer" at biology news

Big differences in duplicated DNA distinguish chimp and human genomes

...ng shared segmental duplications, humans often had fewer copies of those segments than chimps. The most dramatic example involved a piece of DNA near the site of an ancient chromosome fusion point on chromosome 2. In humans, this piece of DNA is represented as four copies, but in the chimp it has expanded ...

Researchers extend mouse lifespan by protecting against free radicals

... in wild-type mice. The MCAT mitochondria also had fewer mutations, and the MCAT nuclear DNA had fewer oxidized components. "This study is very supportive of the free-radical theory of aging," said Rabi...

New Vaccine To Be Used For First Time In Polio Outbreak Response

... a greater immunity to type 1 wild poliovirus with fewer doses. Use of mOPV1 is expected during a nationwide immunization campaign in the second half of May. Yemen had already conducted a mass campaign on 11-14 April, as the country was considered to be at high-risk of polio re-infection from nearby Sudan ...

The genetic origins of corn on the cob

... ramosa1 activity (e.g. typical corn) tend to have fewer branches, shorter branches, and fewer flowers whereas plants with less ramosa1 activity (e.g. sorghum, rice, and the ramosa corn variety d...

$6.5 Million Grant for Microarray Center at Yale School of Medicine

... ramosa1 activity (e.g. typical corn) tend to have fewer branches, shorter branches, and fewer flowers whereas plants with less ramosa1 activity (e.g. sorghum, rice, and the ramosa corn variety d...

Researchers feed tiny pills of RNA to planarians to identify genes essential for regeneration

...ith little redundancy in its genes, meaning it has fewer genes to carry out specific functions. This makes it easier to identify a gene's function by silencing it and will help how researchers target their efforts on equivalent genes in mice or zebrafish, for example. * It is inexpensive to study. Now...

Scientists find that protein controls aging by controlling insulin

...iabetic. Mice with the excessive Klotho also had fewer offspring than normal mice, said Dr. Kuro-o, a Southwestern Medical Foundation Scholar in Biomedical Research. ...

Snapin: A protein with therapy potential for autism

... abnormal decrease in dendrite branches, there are fewer sites to receive information and communication may... such as autism and Rett syndrome display not only fewer branches, but also show two quite different dendrite patterns. Firestein's most recent work explores...

New Discovery May Help Doctors Treat Infertility

...t infertility or subfertility, including producing fewer offspring, or having less frequent pregnancies. Treatment with fertility drugs did not improve ovulation rates in these studies. Years of study have shown that the hormone estrogen plays an important role in a variety of systems, most especially fem...

Bacteria are key to 'green' plastics, drugs

...o refine the organism to produce higher yields and fewer byproducts. ...

Looks matter to female barn swallows

...se color was unchanged fathered the same number or fewer chicks than they had in their first nests. "The study shows that the females are paying close attention to these signals and that they respond quickly to changes in their mate's appearance," said Safran. The reddish breast and belly feathers indica...

Gap-climbing fruit flies reveal components of goal-driven behaviors

...invertebrates rather than in mice or cats involves fewer ethical problems and is less-expensive research. Using noninvasive neurogenetic techniques for the analysis of the underlying motor-control system, Pick and Strauss showed that in order to reach a goal, flies compose complex motor patterns from diff...

New technique rapidly detects illness-causing bacteria

... results suggest the sensitive method could detect fewer than 100 cells of a pathogen in just half an hour. Nugen's software also compares a target site with sequences from other organisms to make sure they don't overlap, which could lead to a misdiagnosis. "You want to be sure it doesn't detect another...

Monkeypox mystery: New research may explain why 2003 outbreak in the US wasn't deadly

...keypox usually produces a less severe illness with fewer fatalities than smallpox. But its symptoms are similar: fever, pus-filled blisters all over the body, and respiratory problems. "Our finding may explain the lack of case-fatalities in the 2003 monkeypox outbreak in the United States, which was cause...

Study identifies gene in mice that may control risk-taking behavior in humans

...h just one copy of neuroD2, researchers also found fewer nerve cells in the amygdala. Researchers conducted experiments on mice with a single copy of the neuroD2 gene to test the theory that only having one copy of the gene impacts emotional learning and the development of traits such as fear and aggres...

Elderly mice yield clues to the process of growing old

...mpairment, loss of muscle mass, weakened bones and fewer circulating red blood cells. Mitochondria are stru...ism. In turn, that change prompts cells to produce fewer of the reactive free radical molecules. The symptoms of aging become pronounced with the loss of so...

Proposal would allow wild animals to roam North America

...opulations have declined by 80 to 90 percent. With fewer beavers to create dams that raise water tables, fewer wetlands developed to support willows. Today, there are 60 percent fewer willows in parts of Colorad...

Why do aneurysms form? New studies suggest leading role for white blood cells

...ent of the normal rats. Days after the injury, far fewer neutrophils and macrophage whit blood cells were present in the aorta walls of the rats that lacked L-selectin. "Much further research is needed, but it's possible that a treatment based on L-selectin could be developed to prevent AAA development in...

Ancient DNA confirms single origin of Malagasy primates

...gest living lemur, Indri indri, which weighs in at fewer than 15 to 17 pounds. "The most important conclusion to be drawn from our study is that the phylogenetic placement of subfossil lemurs adds additional support to the hypothesis that non-human primates colonized Madagascar only once," Yoder said. "Ho...

Progress on HIV/AIDS significant but insufficient

... of prevention programmes was still low. Globally, fewer than one person in five had access to services to prevent AIDS, owing to the hesitation of leaders and to persistent taboos relating to sexuality and high-risk behaviour. The main recommendations included targeting prevention efforts in countries whe...

1 2 3 4 5 6 7 8 9 10