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Tag: "smaller" at biology news

Invasive ants territorial when neighbors are not kin

...out coastal California and abuts three of the four smaller colonies. At the territory borders, ants from dif...estimated that border skirmishes around one of the smaller colonies, at Lake Hodges north of San Diego, killed at least 15 million workers over the six month s...

Math model predicts cancer behavior

...mulations grounded in understanding phenomena at a smaller scale, have been a staple of chemistry, physics, and related engineering disciplines for a long time." Quaranta and Cummings expect to see this new way of thinking sweep through biology. "Particularly in cancer biology, we know so much about tumo...

Gold nanoparticles prove to be hot stuff

... would enable faster measurements and detection of smaller motions at the same laser power. As described in the Aug. 15 issue of Optics Letters,* the JILA team demonstrated that 100-nanometer-wide gold beads, as expected because of their metallic nature, can be trapped and detected six times more easily than...

Weighty viruses

... simpler geometry. The team constructed a CIT with smaller dimensions than usual, optimized the geometry, and exchanged the usual terminal electrodes of the cylinder with transparent, electrically conducting plates. This special construction is what made application of the precise light-scattering technique ...

Road-crossing in chimpanzees: A risky business

... roads, one large and busy with traffic, the other smaller and frequented mostly by pedestrians. Adult males, less fearful and more physically imposing than other group members, were found to take up forward and rearward positions, with adult females and young occupying the more protected middle positions. T...

Vaccination with embryonic stem cells prevents lung cancer in mice

... in vaccinated mice were, on average, about 80-90% smaller than tumours in unvaccinated mice. All the unvaccinated mice developed tumours. None of the vaccinated mice developed autoimmune disease or a showed a significant decline in adult pluripotent bone marrow stem cells ?both potential adverse responses...

The power of one: A simpler, cheaper method for cell fusion

...ons, Lu said his technology requires significantly smaller sample volumes. "This could be very important," he said. "For example, if you had to supply cells from your own body or from another live organism, you would want to take as few as possible." Lu's device consists of fluid-filled channels inside...

A buffet for early human relatives

...til now, lasers were too destructive to use on the smaller teeth of human ancestors and their relatives ?even those of Paranthropus, known for relatively large teeth and a strong, heavy jaw. Passey improved the laser technique. "What I did was fine-tune the method to handle very small samples like human-...

New technique boosts size of proteins that can be analyzed

...first broken down, or digested, enzymatically into smaller units of five to 20 amino acids. These pieces are then introduced into the mass spectrometer where researchers can match masses of those pieces to known sequences and identify the proteins. However, this approach reveals less information concerning...

Ebola-outbreak kills 5000 gorillas

...as but it has pushed once huge populations down to smaller sizes at which they are dramatically less resilient to illegal hunting and other looming threats. Just as troubling are recent studies showing that the Ebola infection wave is spreading rapidly towards several of the remaining large protected area...

Rescuing injured hearts by enhancing regeneration

...ent," Engel adds. One possibility is to inject smaller doses of the agents into the damaged area of the heart in gel form, or instill them through a catheter, so that they would remain in the heart and be released slowly over time. Engel and colleagues recently reported another compound that stimulates c...

Scientist's persistence sheds light on marine science riddle

...colonize the deep sea, large-bodied species become smaller and small-bodied species become larger. "I've been building the Malacolog database for many years as a tool for research, summarizing information on the names and distributions of species of mollusks, but I had not anticipated asking this particula...

First Biodiversity Census of coral reef ecosystems in the NW Hawaiian Islands

... at French Frigate Shoals. Although some of these smaller organisms may not be as charismatic as monk seals, or colorful aquarium fish (until you look under a microscope), they form the complex tapestry that supports the existence of the larger animals, and changes in their abundance or diversity are often ...

Key gene controlling kidney development found

...eloping mice lacking the Six2 gene were remarkably smaller than normal mice and were non-functional at birth. In addition, they produced an abnormal excess in the number of nephrons that in turn produced a useless mass of tissue. Furthermore, the remaining precursor cells underwent apoptosis (cell suicide), ...

Giant insects might reign if only there was more oxygen in the air

...ration in the atmosphere is high, the insect needs smaller quantities of air to meet its oxygen demands. The tracheal diameter can be narrower and still deliver enough oxygen for a much larger insect, Kaiser concluded. ...

Electric jolt triggers release of biomolecules, nanoparticles

...s are attached to a surface, we can work with much smaller concentrations," Searson said. "We've also shown that our system is reusable. After a group of molecules is released, you can easily attach new molecules to an electrode and use it again." Earlier this year, Searson, Mali and Bhattacharjee reported...

MIT's molecular sieve advances protein research

...ers. These barriers separate proteins by size. The smaller proteins go through more quickly, followed by increasingly larger proteins, with the largest passing through last. Once the proteins are separated, scientists can isolate and capture the proteins of interest. These include the "biomarker" proteins t...

Particle size matters to bacteria ability to immobilize heavy metals

...ticles are more quickly reduced and dissolved than smaller particles." The researchers have determined that...fer larger nanoparticles ?about 100 nanometers ?to smaller nanoparticles (less than 20nm) of similar shape. The reasons are still under investigation. Nanopa...

For Pacific white shrimp, gender matters when competing for food

...ts that, while larger shrimp consistently win over smaller shrimp of the same gender when competing for food,...ough adult males of the species are typically much smaller than the adult females of the same age. "Both size and gender are important factors in acquiring fo...

The first tree genome is published: Poplar holds promise as renewable bioenergy resource

...ome size of 480 million nucleotide units, 40 times smaller than the genome of pine, are among the many features that led researchers to target poplar as a model crop for biofuels production. "Under optimal conditions, poplars can add a dozen feet of growth each year and reach maturity in as few as four ye...

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