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Tag: "young" at biology news

Male chimpanzees prefer mating with old females

...m unusually long-term mating bonds, thereby making young females more valuable as mates with greater reprod...explanations for the preference of human males for young females as mates include the facts that humans tend to form long-term mating partnerships, and that ...

Stem cell activity deciphered in the aging brain

...ng, middle-aged and old rats. They found that in young rats, the hippocampus contained 50,000 stem cells ...to become mature nerve cells. They found that in young rats, approximately 25 percent of the neural stem cells were actively dividing, but only 8 percent o...

How brain injury leads to seizures, memory problems

...I is the leading cause of death among children and young adults in this country. There are no cures known for traumatic brain injury. Our hope is that our research may contribute to potential therapies for TBI patients." Transportation accidents such as car crashes are responsible for the majority of TB...

Cardiologist's 'living chip' changes science of disease monitoring

...rtners Inc. The Rochester-based consortium assists young companies with funding from New York state, Cornell University and the University of Rochester, and provided Rosero's start-up with the opportunity to develop a first-generation device. As research progressed, Excell offered additional support that t...

'Nymph of the sea' reveals remarkable brood

...ristened Nymphatelina gravida, meaning' a pregnant young woman of the sea'. This remarkable discovery provides an unequivocal and unique view of parental brood care in the invertebrate fossil record, it allows gender to be determined in an animal as old as the Silurian period of geological time, and indica...

Enzyme shreds Alzheimer's protein

... Aß, called Aß1-42, into neurons increased CatB in young and middle-aged mice with human APP, but not old mice. "Thus, upregulation of CatB may represent a protective mechanism that fails with aging," wrote the researchers, and such failure may play a role in late-onset sporadic AD. Their test tube stud...

Batfish to the rescue!

... attractive to spear-fishers, while they depend as young fishes on coastal mangroves which are in decline in many areas. "Indeed, the resilience of inshore GBR reefs may be closely tied to the fate of mangroves and their suitability for batfish recruitment." Batfishes may be one of the last intact he...

Commercial fishing causes dangerous fluctuations in fish populations

...ve the population close to collapse, with very few young fish coming into the group to replace those being caught." Professor Beddington adds that the increased variability has serious implications for the way in which fish stocks are managed: "Typically fish populations are managed by governments setti...

Age-related changes in DNA repair illuminate the connection between age and genetic damage

.... In the new work, researchers found that cells in young fruit flies make use of a different mix of molecul...he new results show that the reproductive cells of young flies tend to use the rough-and-ready repair processes that do not involve extensive DNA synthesis a...

Handling HPV vaccines and screening: The views of 100 authors

...e-adolescent girls and the optional vaccination of young and middle-age women, HPV vaccines may in some instances be recommended as a universal vaccine for both genders towards the prevention of cervical cancer. "An unprecedented and phenomenal challenge for Public Health in the 21st century", according to...

Blue eyes -- A clue to paternity

...els on a computer. The pictures were close-ups of young adult faces, unfamiliar to the participants. The ...-eyed models. In a second study, a group of 443 young adults of both sexes and different eye colors were asked to report the eye color of their romantic p...

Honey bee genome holds clues to social behavior

...f the hive has a shortage of foragers, some of the young nurse bees will switch jobs and become foragers. The job transition, whether triggered by age or social cues, involves changes in thousands of genes in the honey bee brain; some genes turn on, while others turn off. Genes are switched on and off ...

Ecstasy can harm the brains of first-time users

...in blood circulation in some areas of the brain in young adults who just started to use ecstasy,?said Maartje de Win, M.D., radiology resident at the Academic Medical Center at the University of Amsterdam in the Netherlands. “In addition, we found a relative decrease in verbal memory performance in ecstasy...

Bird flu vaccine additive may stretch supply

... pandemic threat. The researchers vaccinated 96 young adults who were divided into eight groups receiving different dosage levels, half of the groups with and half without the MF59 adjuvant. The volunteers were tested for antibodies at 28 days and 56 days. "Antibody in the blood to the influenza viru...

A new jump start for aging blood vessels

...ocal effects. Lastly, administration of TNFa to young arteries reproduced the features of vascular aging, such as blood vessel dysfunction and cell death, further confirming the role of TNFa in the aging of the cardiovascular system. The knowledge that cardiovascular disease is the leading cause of d...

When nerve cells can't make contact

...n psychiatric illnesses. Around 0.5 percent of all young children have a syndrome belonging to the "autistic spectrum". The main symptoms of this developmental malfunction are delayed language development or no language development at all, disturbed social behaviour and repetitive behaviour patterns. In ma...

Parental genes do what's best for baby

... try to impose their genetic stamp so that smaller young are born. “The idea that imprinting evolves because of conflict between males and females over maternal investment in their offspring has become a generally accepted truth that has remained largely unchallenged,?said Dr Wolf. “But we have shown...

Cougar predation key to ecosystem health

...my gone, growing and ravenous deer populations ate young cottonwood trees almost as quickly as they sproute...mbanks in this watershed have nearly 50 times more young cottonwood trees as well as thriving populations of flowers, lizards, butterflies, and several speci...

Scientists work to identify genes that contribute to early heart attack risk

...sis genes. This autopsy study included about 3,000 young people, ages 15 to 34, who died from accidental causes, suicide and homicide. This study, which started in 1985, provided some of the best evidence that the process of atherosclerosis begins in childhood and adolescence. Using the latest technology, ...

Obesity levels in US are grossly underestimated

... weight while men do not. When it comes to height, young and middle-aged men tend to overestimate their height more than women in the same age group. In 2002, the corrected prevalence of obesity in the U.S. population was 28.7% for adult men and 34.5% for adult women, more than 50% higher than previously e...

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