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Tag: "smaller" at biology news

Enzyme delivered in smaller package protects cells from radiation damage

...ts from Stanford University, have developed a new, smaller gene therapy vector that may be effective in delivering a radioprotective enzyme systemically throughout the body which may spare healthy tissue the long-term consequences of therapeutic irradiation. These results are being presented at the 10th annu...

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

...ti-malarial drug resistance is important, but much smaller than what many researchers thought it would be," s...create and express a synthetic version of the much smaller PfCRT gene. PfMDR1 is made up of about 4,000 base pairs and its protein is particularly large, Roepe...

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

...nas must have arrived by rafting over water to the smaller and younger islands, the Lesser Antilles, because they never were connected by land to South America, but neither theory proposed that all of the Caribbean-island frog species had a single common ancestor," Hedges said. __IMAGE_3 The anatomy of...

Alzheimer's disease to quadruple worldwide by 2050

...ogression of Alzheimer’s disease would result in a smaller overall reduction of 9.2 million cases by 2050, because slower disease progression would mean more people surviving with early-stage disease symptoms. However, nearly all of that decline would be attributable to decreases in those needing costly late...

CT scan reveals ancient long-necked gliding reptile

...the exact morphology of all the appendages because smaller bones were difficult to resolve due to the size of the specimen." The specimens were scanned at a resolution of about one tenth of a millimeter or less. The researchers could determine that the feet were curved, indicating that the reptiles proba...

Marine phytoplankton changes form to protect itself from different predators

...dioxide, a leading greenhouse gas. If consumed by smaller creatures like ciliates, less of the carbon sinks to the deep sea and more remains in the surface waters. “This could alter the flow of energy and nutrients from deep to shallow, depending on what might be trying to eat it, and how the organism re...

Children of smokers have more than 5 times higher levels of a nicotine toxin

...ies tend to come from poorer homes, which may have smaller rooms and inadequate heating. ‘Higher cotinine levels in colder times of year may be a reflection of the other key factors which influence exposure to passive smoking, such as poorer ventilation or a greater tendency for parents to smoke indoors ...

Scientists close in on missing carbon sink

...hern mid- and upper-latitude regions are playing a smaller role in offsetting global warming than previously thought, according to a study appearing in Science this week. The study, which sheds light on the so-called missing carbon sink, concludes that intact tropical forests are removing an unexpectedly hig...

Lessons from the orangutans: Upright walking may have begun in the trees

...d bipedal and began eating food from the ground or smaller trees. The ancestors of chimps and gorillas, on the other hand, became more specialized for vertical climbing between the high canopy and the ground and thus developed knuckle-walking for crossing from one tree to another on the ground. "Our concl...

Chronic fatigue syndrome impairs a person's slow wave activity during sleep

...non-REM period of recovery sleep and accumulated a smaller percentage of SWA in the first non-REM period than their twin counterparts. "CFS shares symptoms with depression, and some experts have suggested that it is not a distinctly different disorder," said Armitage. "We have also conducted studies of S...

Magnetic computer sensors may help study biomolecules

...zed or larger. Existing magnetic tweezers can trap smaller particles and apply torque, but typically require permanent immobilization of biomolecules, which is time consuming and prevents subsequent analysis. ...

Iowa State scientists demonstrate first use of nanotechnology to enter plant cells

...ion on the particle surface. They synthesized even smaller gold particles to cap the nanoparticles. These "golden gates" not only prevented chemical leakage, but also added weight to the nanoparticles, enabling their delivery into the plant cell with the standard gene gun. The biologists successfully use...

Get a whiff of this: Smell test could sniff out serious health problems

... when you sniff and you detect a smell, you take a smaller sniff than if you inhaled and didn’t detect a smell,?Frank explains. “For someone with normal sense of smell, the size of the sniff when detecting an odor is cut in half. For someone who cannot detect odor, the size of the sniff for just air and the ...

Natural antibiotics yield secrets to atom-level imaging technique

...ne better, resulting in greater effectiveness with smaller amounts of AMP. "Our overall mission is to use the kind of basic physical data we obtain from solid-state NMR spectroscopy to help interpret biological functions," Ramamoorthy said. The work is highly interdisciplinary, involving not only Ramamoor...

Tundra disappearing at rapid rate

...as you can only go so high so they get forced into smaller and smaller areas," said Danby. These changes are of particular importance in these northern regions where F...

Male-killing bacteria makes female butterflies more promiscuous

...rs leads to fatigue in males. They start producing smaller sperm packages. Unfortunately, the female butterflies instinctively know that the packages are smaller and that their chances of having been impregnated after mating are lower than usual. This just makes...

Pitt study notes decline in male births in the US and Japan

...es should be carried out that examine sex ratio in smaller groups with defined exposures as a potential indicator of environmental contamination.? ...

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

...orn lighter than those with a brother, making them smaller than the optimal size for males. The research also...s. This means that size matters for males - being smaller than average is one of the major limiting factors for reproductive success. Aline Kühl from Impe...

Woven scaffolds could improve cartilage repair

...current approaches are only suitable for repairing smaller areas of cartilage damage or injury." Cartilage is a type of connective tissue that lines the ends of bones, providing cushioning and a smooth surface for their movement within the joint. Damage to cartilage is difficult to treat, the researchers ...

Bypassing eggs, flu vaccine grown in insect cells shows promise

...18 to 49, one-third of the participants received a smaller dose of the vaccine (75 micrograms), one-third rec...conducted. As the scientists expected, both the smaller dose and the larger dose caused an immune reaction generally considered effective for fighting off t...

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