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Tag: "least" at biology news

Warning from Asian bees

...n to have found their way into Australian ports at least half a dozen times in the last decade. This tim... the latest incursion had lain undiscovered for at least three months, it is unknown how many more swarms might exist and how far afield they may have flown....

Runners -- Let thirst be your guide

...rathon and triathlon races, and there have been at least 8 documented fatalities. Some people have been known to gain up to 6-7 pounds during a marathon due to retention of water that the kidneys cannot excrete, he says. “No one should be gaining any weight during these events,” according to Verbalis, “and...

Mutating the entire genome

...k, “depending on who you ask, although probably at least half of the ‘junk’ DNA is going to end up having a pretty important function,” Capecchi says. Capecchi is known for developing gene targeting, in which mice are bred with a gene disabled or “knocked out” to see what goes wrong, thus revealing the...

Researchers demonstrate way to control tree height

...f genetically modified organisms would require, at least in the U.S.” That aside, he said, it appears that with further research and development programs, it would indeed be possible to create an elm tree – which ordinarily would grow to 100 feet or more – that is only five feet tall at maturity, a char...

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

Children who have at least one parent who smokes have 5.5 times higher levels...ts aged 12 weeks. Seventy one of the babies had at least one parent that smoked and the parents of the other 33 were non-smokers. The authors say: ‘Smoki...

Ancient retrovirus sheds light on modern pandemic

... primates 4 million years ago ironically may be at least partially responsible for the susceptibility of humans to HIV infection today. These findings, reported by a team of researchers at Fred Hutchinson Cancer Research Center in the June 22 issue of Science, provide a better understanding of this modern...

Adult stem cells from human cord umbilical cord blood successfully engineered to make insulin

...ells, the presence of the C-peptide proves that at least some of the insulin was produced, or synthesized, by the engineered cells....

Focused ultrasound relieves fibroid symptoms in women

...According to the National Institutes of Health, at least 25 percent of women in the United States age 25 to 50 suffer from symptomatic uterine fibroids. Fibroid symptoms can include excessive menstrual bleeding, enlarged uterine size, frequent urination, pelvic pressure or pain and infertility. Accordi...

Philandering female felines forgo fidelity

...t all males in the study area had been sampled. At least some of these missing fathers undoubtedly resided outside the study area. The findings corroborate established studies on ranging patterns of female and male cheetahs. Female cheetahs occupy a home range averaging some 833 square kilometers in siz...

Early exposure to indoor fungus molecules may protect infants against future allergies

...ng at greater risk for future allergies because at least one parent had known allergies. The CCAAPS, funded by the National Institute of Environmental Health Sciences, is a five-year study at UC examining the effects of environmental particulates on childhood respiratory health and allergy development. ...

Mice with a migraine show signs of brain damage

...light. The aura that precedes the headaches for at least one out of four migraine sufferers might involve floating black spots, flashing light, or some other visual changes. Nedergaard says those disturbances might actually be a visual sign that parts of the brain are short of oxygen. In the work descri...

Climate change was the cause of Neanderthal extinction in the Iberian Peninsula

...la. Cold, arid and highly variable climate was the least favourable weather for Neanderthals and 24,000 years ago they had to face the worst weather conditions in the last 250,000 years. The most important about these data is that they differ from the current scientific paradigm which makes Homo Sapiens...

'Insulator' helps silence genes in dormant herpes virus

By adulthood, most people have suffered at least one bout of painful cold sores brought on by the Herpes simplex virus 1, also known as HSV-1. After the initial infection, the virus usually remains in the body, hiding out in nearby nerve cells where the victim's immune defenses cannot reach it, cau...

Gene malfunctions cause schizophrenia, depression symptoms in mice

... that schizophrenia and bipolar disorder share, at least in part, common genetic etiologies and thus underlying molecular mechanisms." ...

Fuel from fiber -- Pretreatment can put corn stalks, trees in your car's tank

...nk." Fuel companies aren't touting that slogan. At least not yet. But thanks to research done in part by Bruce Dale, Michigan State University professor of chemical engineering and materials science, making fuels from poplar trees and corn stalks is becoming more efficient and cost-effective. Dale is i...

Alien plants attack using 'resource conservation' as weapon, researchers say

One of the most serious and least understood threats to the world's ecosystems is the problem of invasive species-exotic plants, animals and other organisms that are brought into habitats and subsequently spread at a rapid rate, often replacing native species and reducing biodiversit...

Corals -- More complex than you?

...shed genes particularly fast. Corals which take at least 5years to reach sexual maturity (compared with the laboratory fruitfly whose generation lasts only 3-4 weeks), and which have long and overlapping generation times, may thus be a living ‘museum?of ancestral animal genes. However corals use all th...

8 plants from South Africa may hold potential for treating high blood pressure

...etermined to test the sensitivity of the assay. At least three separate determinations were conducted for each test compound. A tannin test was only conducted on those plant extracts that exhibited over 50 percent ACE inhibition in the initial analysis. The data was subjected to GraphPad Instat (GraphPad ...

Scientists: As rainfall changes, tropical plants may acclimate

...lity to acclimate to big changes in rainfall in at least one important respect ?how they get nutrients. The...different strategies to getting what they need. At least with regard to nitrogen uptake, all the Hawaiian plants acted the same -- and at the same time. "...

Newborn neurons like to hang with the 'in' crowd

...grate into the existing network of brain cells, at least in mice living in bare standard cages. Providing the mice with a stimulating, enriched environment—large cages filled with running wheels, colored tunnels and playmates—boost the number of neurons that manage to hook up with the existing network to 8...

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