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Tag: "grows" at biology news

Mass vaccination unnecessary in the event of a large bioterrorist US smallpox attack

...tagious. Then a rash emerges all over the body and grows increasingly severe over the next 20 or so days, eventually forming scabs; during this period people are contagious, particularly during the first seven to 10 days of the rash. The disease eventually resolves and contagion ends after all of the scabs...

Most important actors in the growth process of neurons identified

...re than a meter long. The axon's orientation as it grows is also of great importance in forming the right connection. As in-coming stimuli are converted into signals that determine the direction and speed of an axon's growth, three things can happen: the axon can grow further, pull back, or change directio...

Faster, more accurate tuberculosis test developed

...n three principles: (1) Mycobacterium tuberculosis grows faster in liquid medium than in solid medium; (2) TB grows in characteristic tangles or coils and these characteristic cord formations can be seen microscopica...

'Trojan Horse' agent halts bone metastasis in mice

...gineered toxin, gelonin, derived from a plant that grows wild in India, and used bacteria to produce the fusion protein. The agent is designed to enter new blood vessel cells in tumors through expressed VEGF receptors and, once inside, the "Trojan Horse" toxin destroys the cell, disrupting the ability of t...

Developing uses for sugar-cane bagasse: Biotechnology applied to the paper industry

...y sythesizes only small amounts of laccase when it grows on bagasse. It is necessary to add volatile agents such as ethanol, in order to increase production of the enzyme under these conditions. Ethanol was chosen as a laccase-inducer in this study because of its abundance, its low toxicity and low product...

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

...etle, Titanus giganteus, from South America, which grows 15-17 cm, Kaiser said. And why wouldn't the opening between the body and the leg limit insect size in the Paleozoic era, too? After all, dragonflies and some other insects back then had the same body architecture, but they were much bigger. It ...

Study IDs protein that inhibits HIV from growing in cell cultures

...g added. Xiang previously discovered that GBV-C grows in the same type of white blood cells, CD4 T-cells, that HIV grows in and ultimately destroys. HIV attaches to this T-cell by first landing on a receptor called CD4. O...

Edible coatings will be the packaging of the future

... milk serum protein. This is a polysaccharide that grows in dry and semi-arid regions of the north of Mexico. The result is a compound film that is resistant and that maintains suitable mechanical properties. The use of mesquite gum is an economical and efficacious alternative with a promising future, not ...

New clues to how sex evolves

...ld be that C. elegans, which is hermaphroditic and grows to maturity in only three days, is under a lot of competitive pressure to reproduce quickly, and that different binding sites on different Pairing Centers makes for faster chromosome pairing and thus faster reproduction -- unlike organisms that need ...

Smashing the time it takes to repair our bones

... grow bone tissue in the same environment our body grows bones. I have taken bone cells and put them in the physical environment they would experience in the body, and then varied the stimulants to extract a beneficial environment for tissue growth," he said. Dr Hannay's research has advanced the unders...

Molecular motors and brakes work together in cells

...bule can be formed. The new "daughter" microtubule grows and moves along the mother microtubule. In time, the daughter grows beyond the end of the mother to ultimately produce two microtubules, connected by the cross-linking ...

MIT: Pulsing light silences overactive neurons

...ene called halorhodopsin found in a bacterium that grows in extremely salty water, such as the Great Salt Lake in Utah. In the bacterium, Natronomas pharaonis, the gene codes for a protein that serves as a light-activated chloride pump, which helps the bacterium make energy. When neurons are engineered ...

Baby fish 'smell their way home'

...then recognizing their signature as "home" when it grows up a bit and is ready to settle," Mike says. "This evidence that individual coral reefs play such a key role in the emergence of new species is a fresh reason to take even greater care in how we look after them." ...

Nanotechnology shows promise as next wrinkle fighter

...les can initiate from the small scale, and when it grows we cannot remove it." Nanoparticles already have entered the cosmetic marketplace because they can penetrate deeper into the skin, transporting vitamins and other compounds to plump and smooth tissue. But Ilsoon envisions thin films that can be inj...

Study finds surfing safer than soccer

...ller waves, as the energy of waves increases as it grows in height. In addition, a sea floor with a sandy bottom is much more forgiving upon impact than one covered with reefs or rocks," says Nathanson. The paper cites that establishing an injury rate for surfing is not just of academic or general inter...

The penalty of having a sister -- why sibling sex matters for male saiga antelopes

...ould be sex-specific, meaning that the male foetus grows bigger than the female. However, it seems there are limitations in the ability of the mother to provision mixed twin litters in the womb," she said. The researchers point out that mixed-sex litters have been shown to have an impact on animal heal...

Hives ferment a yeasty brew, attract beetle pest

... report. Complicating the issue is the yeast that grows in the hives. The researchers found that this yeas... yeast in and it reproduces, or, because the yeast grows on pollen in nature, perhaps bees bring it into the hive." This combination of domestic honeybees...

Scientists seek useful traits in wild cottons

...ing to make the database a reality. Mabry grows cotton plants in PVC tubes, measuring the characteristics of their roots, shoots and leaves and comparing them to a group of control cottons. The data from these comparisons could help scientists discover which physical traits help impart drought res...

Helping chlorine-eating bacteria clean up toxic waste

...re injected into cleanup sites. The bacterium also grows better in a mixed community with other kinds of bacteria. "There are some factors it needs from other organisms, and we don't know yet what they are," she said. Her laboratory will test the D. ethenogenes strains under a variety of different condi...

The kapok connection -- Study explains rainforest similarities

...t form of Ceiba pentandra, a species of kapok that grows taller than a 16-story building, its head poking above the forest canopy. Its flowers produce more than 50 gallons of nectar per tree in a season, attracting bats that travel as far as 12 miles between trees and transfer pollen in the process. Whe...

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