Tag: "comparison" at biology news

How far to the nearest road?

...5.3 million kilometers of streams and rivers. "The comparison of these two sets of data begins to give you an idea of the potential influence of roads on forest ecosystems," said Riitters. "Effects of roads--what we call influence zones-- extend tens to hundreds of meters from the roads themselves, altering hab...

Heart disease among some Japanese may be due to sequencing variation inside a gene

... region and one in the exon-intron boundaries in a comparison to the National Center for Biotechnology Information (NCBI) sequence database. Conclusions This study strongly demonstrates that it is important to characterize sequence variations of any disease genes, since there are ethnic differences in sequen...

Mother-infant bed sharing is associated with an increase in infant heart rate

... statistical analysis (ANOVA). The within-subject comparison was between the bed sharing night and the solitary...ute or immediate effects, while the across-subject comparison was between routine bed sharers and routine solitary sleepers on both nights to assess long-term, po...

New research tool allows perimenopausal women to assess their ovulation status

...ive age women. This was a small group obtained for comparison purposes and included women who had been prescreened for menstrual regularity and were therefore highly likely to have ovulatory cycles. Some differences in the hormone patterns of these women were noted when they were compared with the SWAN sample; ...

VEGF gene transfer fails to help peripheral arterial disease patients

... walk 1.6 and 1.5 minutes longer, respectively, in comparison with placebo patients, who could walk 1.7 minutes longer. One interesting observation was that patients treated with placebo improved somewhat, reinforcing the need for double-blinded trial design when investigating new approaches so that definite s...

Encrustation provides clues about ancient seas

... (GSA) in Memphis March 12-14, Rodland presented a comparison of the encrustation of a bivalve mollusk (Macoma) with the encrustation of an articulate brachiopod (Bouchardia) from the coast of Brazil. "This is the only tropical / subtropical site where both bivalves and brachiopods occur in abundance in the pre...

Dartmouth researchers put recycling in perspective

...ecycled is difficult to measure and quantify. For comparison purposes, the researchers looked at the number of SUVs, light trucks and minivans registered from 1989 to 1999, which increased from 31 to 44 percent of all cars registered. They used data from the US Bureau of Transportation statistics for informati...

JCI table of contents, March 3, 2003

...d a newmouse model of myocarditis that allowed the comparison of differentpopulations of cytotoxic CD8+ T cells specific for the same definedmyocardial antigen. Their results (pages 671-680) showed that while IL-12was not essential for the generation of cytolytic, IFN-gproducing effectorT cells, only CD8+ T cel...

[Mis]understanding village abandonments

...resent today among their descendents today. In a comparison of past with present, Varien also investigated the connection between the archaeological sites in the area and the Native Americans who currently live in the Four Corners area, and found that the ancients had shaped the cultural landscape for their ...

Waging war: The curse of human intelligence

... social and political systems are slow to adapt in comparison to the pace of technological development." Previous theories on motives for revenge, based on socio-biology, have centered on an escalating tit-for-tat complex. This theory holds that humans have simply taken behavior routinely practiced by other...

An origin of new world agriculture in coastal Ecuador

...he large fruits of domesticated plant varieties in comparison to the smaller phytoliths present in their wild relatives. Piperno and Stothert compared phytoliths from squash fruits they found in sites on the Santa Elena peninsula in Ecuador to others in a huge reference collection, including wild and cultivated...

Brain banks are a powerful tool for alcohol research

...usion from the brain bank or clearly identified in comparison groups. "One of the important advantages of a brain bank is that the same cases can be used by a number of different research groups using different approaches and techniques," said Harper. "That information can then be compared to help us understa...

UCSF study suggests novel factor could contribute to adult obesity

...lt mice. The most dramatic findings were seen in a comparison of middle-aged and younger-adult mice genetically engineered to lack a brain cell receptor known as 5-HT(2c), which receives signals from the brain chemical serotonin; an effect, though less dramatic, was also seen in normal mice. Traditionally, scie...

Fruit flies unlock Methuselah's secrets

...search is common as these flies are short-lived in comparison to humans but carry out many of the same biological processes. The current focus of research is on genes that increase the life span of an animal because it is difficult to disentangle changes that decrease life span from those that cause disease. ...

Monkeys show sophisticated learning abilities

...nd decrease in accuracy when the initial item in a comparison is farther down in the original list. In analyzing the results, the scientists found such an effect in the monkeys. "These effects tell us that there seems to be some kind of common code in both monkeys and humans for distinguishing order -- perhaps ...

The jaws stiffness found to dictate speech production

...directional asymmetries of stiffness of the jaw. A comparison of the relationship between stiffness and kinematic variation in the jaw against the patterns was observed when subjects compensate for destabilizing loads to the limb. The ability of subjects to compensate for these loads has been shown to depend on...

Honey bee genome being sequenced

...on available through NIH is generally displayed in comparison to the human, Weaver said. "It's a lot more difficult to compare other species among themselves. We hope the bioinformatics at Texas A&M will allow direct comparisons of genomic information of agricultural species." Also, "as an agricultural ...

Researchers discover gene that controls ability to learn fear

...t is not known to be involved in learned fear. The comparison revealed two candidate genes for fear-related learning that are highly expressed in the amygdala. The researchers decided to focus further study on one of the genes, Grp, which encodes a short protein called gastrin-releasing peptide (GRP), because t...

Sea squirt DNA sheds light on vertebrate evolution

...ebrates," said JGI Director Eddy Rubin. "Through a comparison of their genomes, we can now understand how these relationships are reflected at the molecular level, and how these similar systems and gene sets evolved in different ways over 500 million years from a common ancestor." The sea squirt is a urochordat...

Comparisons of the new mouse genome sequence

...d laboratories, Genome Biology publishes the first comparison of this 'public' mouse genome sequence with the mouse genome sequence generated by the private company Celera, and with the human genome. In this article, Michael Zhang and his colleagues from the Cold Spring Harbor Laboratory (New York, USA) identif...

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