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Tag: "young" at biology news

On the track of tiny larvae, a new model elucidates connections in marine ecology

... require a better understanding of the movement of young marine animals, including small larvae, in part because such movements facilitate normal biological connections among geographically separate populations. Although tiny larvae are impossible to follow directly, advances in modeling ocean currents hav...

The structure of a virus infecting bacteria resembles a human virus

...ere diarrhoea, particularly in neonatal babies and young children. Diarrhoea is one of the main causes of infant mortality in developing countries. By studying the viruses in bacteria, researchers can determine various characteristics about the life cycle of viruses that are much harder to study using dan...

Bones hold the key to blood renewal

...hat rendered them only partially functional in the young females. They found abnormally low stem cell levels in the blood of these mice even when they tried to encourage their mobilization, giving them solid evidence of the connection. In normal mice, using a chemical compound that stimulates osteoclast fo...

Queensland scientists identify molecule that links both sides of the brain

...he first to identify a growth molecule that guides young nerves away from the corpus callosum and towards their targets in the opposite hemisphere," Dr Cooper said. "We have shown that the Ryk receptor molecule facilitates the targeting of individual nerve fibres. "This process is critical for the tran...

Cell phone emissions excite the brain cortex

...archers developed a double-blind study in which 15 young male volunteers were exposed to EMF signals from a GSM 900 cell phone for 45 minutes. They measured Motor Evoked Potentials (MEPs) during motor cortex TMS before, and immediately after EMF exposure, and also one hour later. In 12 of the 15 subjects...

Creating a window on 'oceans in motion'

... POST has revealed the Pacific migration routes of young wild salmon from US and Canadian rivers. Knowing their usual travels along marine highways has far-reaching implications for authorities that need to determine when fisheries should be open or closed to conserve endangered stocks. Other scientists...

Malaria, potato famine pathogen share surprising trait

...malaria kills more than one million people ?mostly young African children ?and Phytophthora pathogens devastate a wide range of food and commercial crops. The researchers swapped a small sequence of proteins, called the leader sequence, in P. falciparum with the leader sequence of P. infestans. A leader ...

Honey helps problem wounds

...s far as the treatment of wounds is concerned, his young patients form part of a high-risk group: the medication used to treat cancer known as cytostatics not only slows down the reproduction of malignant cells, but also impairs the healing process of wounds. 'Normally a skin injury heals in a week, with o...

Spray-on skin relieves emotional trauma for child burn victims

...on the emotional and behavioural functioning of 20 young patients with burn scarring. Department of Psychiatry Senior Research Technician Sarah Swannell said 85 percent of all children reported their scars looked either "much better" (40 percent) or "better" (45 percent) with Microskin. "Eighty percent...

Biomarkers may hone anti-aging therapies

...es as to why aging cells function differently than young cells requires that we have molecular markers that we can track," Sligh said. "It won't be long before other investigators who have other human tissue specimens -- brain, lung, heart, for example -- look for these changes and report back. "It will b...

Thinner and younger

... reverse some of these markers of aging in healthy young people," Holloszy says. "It's going to be many years before we know whether calorie restriction really lengthens life, but if we can demonstrate that it changes these markers of aging, such as DNA damage and inflammation, we'll have a pretty good ide...

p53, tumor suppression and aging

...y emphasizes that "many people develop cancer at a young age due to increased expression of Mdm2. The possibility that inhibitors of Mdm2 could delay cancer in such people without causing detrimental side effects is bolstered by our demonstration that mice expressing 30-80% the normal level of Mdm2 develop...

Landmark discovery of a Kaposi's sarcoma-associated herpesvirus receptor

...such as older Italian men, transplant patients and young men in certain parts of sub-Saharan Africa. But th...coma skin lesions began appearing on the bodies of young American men, many of whom went on to develop opportunistic infections. Dr. Berger became interest...

HIV decline in Zimbabwe linked to behavioural change

...s. They found HIV prevalence fell most steeply at young ages, with a drop in prevalence of 49 percent for women aged between 15 and 24, and a 23 percent drop in men aged 17 to 29. In 2003 Zimbabwe was estimated to have 1.8 million people infected with HIV/AIDS out of a population of 12 million. Dr Simo...

How to grow a bigger brain

...dy by researchers at UC Davis. The brains of those young fish were closer to those of salmon reared in the wild, and the fish also showed behavior closer to wild than to hatchery-reared fish. "There's an obvious difference between the hatchery and the wild fish," said graduate student Rebecca Kihslinger, ...

Contaminants linked to sturgeon decline in Columbia river

...ere has been a noticeable decline in the number of young fish, indicating productivity is poor, especially in the impounded areas above dams. In the past, any decreases in population were thought to be linked to the presence of dams, which have changed the temperature and flow of the river. And despite fi...

ASU researchers find link between social behavior, maternal traits in bees

...g, maintaining and defending the hive, raising the young and foraging for nectar and pollen. Other species of bees, like carpenter bees, do not engage in social behavior and instead lead solitary lives. This has prompted researchers to look into how social structures and divisions of labor have arisen in ...

Aging cells, aging body: Fresh evidence for a connection

...nt cells still function, they don't behave the way young cells do ?and are associated with skin wrinkles, delayed wound healing, weakened immune system response and age-related diseases such as cancer. "There is good evidence that senescent cells are not benign," Sedivy said. "But until now, no one has be...

Confidence in memory performance helps older adults remember

...rategies needed to support memory." In fact, even young people have problems with memory performance, though they typically chalk it up to distraction or other external factors. In contrast, older adults are more likely to judge their forgetfulness an inevitable fact of aging or even a warning sign of Alz...

UCLA paper examines how one disease may prevent another

...children's hospital were interrupted at The Hague, young patients with celiac disease, a digestive disease that damages the small intestine and interferes with absorption of nutrients from food, thrived on their "non-bread" diet. Wheat was discovered to be the culprit. Other diseases that benefit from seve...

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