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Tag: "observed" at biology news

Habitat use by North Pacific right whales, Eubalaena japonica, in the Bering Sea and Gulf of Alaska

...r to have a greater pelagic distribution than that observed in the North Atlantic ?perhaps because of the wider availability of larger copepods in Alaskan waters. ...

Study reveals dramatic difference between breast cancers in US and Africa

...en. (This type of basal-like breast cancer is also observed among women with inherited BRCA1 mutations). Tumors that arise from basal cells have a worse prognosis, regardless of race. -- Second, African breast cancers often lacked estrogen receptors. Although 80 percent of breast cancers in Caucasian women h...

Elephant seal pups suffer from ocean warming

...ccess journal BMC Biology. High ocean temperatures observed from 1975 to the late 1990s are correlated with a 28% decrease in the weight of elephant seal pups. Elephant seals are shown to be sensitive to ocean temperature changes associated with both long-term 25-year cycles and short-term 3-4 year cycles suc...

Signs of aging: Scientists evaluate genes associated with longevity

...d with longevity. Most strikingly, the scientists observed that during the early and mid-life adult stages of...d mid-life adults contributes substantially to the observed longevity of daf-2," says Dr. Julius Halaschek-Wiener, a researcher at the BC Cancer Agency's Genome...

Findings have implications for tracking disease, drugs at the molecular level

...). The most efficient gold nanoparticles could be observed at laser intensities lower than those commonly used for multiphoton imaging, in which specific tissues or cells -- cancer cells, for example -- are fluorescently-labeled using special stains that enable them to be studied. "One of the most exciting ...

Cellular Defects in Premature Aging Disease are Reversible

...ls taken from patients affected with progeria, but observed that increased synthesis of normal lamin A did not...their oligonucleotides into the progeria cells and observed that after four days almost all the mutant lamin A transcripts had been eliminated and replaced with...

Disease progression model of pancreatic cancer developed by Penn researchers

...ras and p53 in the mice to changes similar to that observed in pancreatic cancer patients. They report their findings in the May issue of Cancer Cell. The disease that develops in the Kras and p53 mutant mouse model demonstrates distinct similarities to human pancreatic cancer at multiple levels. "In terms o...

Basis for DNA ejection from single phage particles

...sec, but in a stepwise fashion. Pausing times were observed during ejection, and ejection was transiently arrested at definite positions of the genome in close proximity to genetically defined physical interruptions in the DNA. The authors discuss the relevance of this stepwise ejection to the transfer of pha...

Finding hidden invaders in a Hawaiian rain forest

...rstanding how features or processes that have been observed in one or a few places are distributed in space and time. These new methods discovered a consequence of biological invasion that had not been detected before AND showed how it varies across the landscape." "These findings are valuable to resource ma...

Successful Test Of Single Molecule Switch Opens The Door To Biomolecular Electronics

...hes and logic elements,?Lindsay says. “It has been observed in molecules before but never in controlled conditions, never at low voltages, and not in a predictable way.?/p> Lindsay stresses that the main value of the finding is not in having found a molecule that could be developed into a working electric...

A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years

...e mountains. First sighted by Richard Laizzer and observed by research biologist Trevor Jones, while working as field assistants for the project, the monkey was then identified as a new species by Ehardt and by Dr. Tom Butynski, who directs Conservation International (CI)’s Eastern Africa Biodiversity Hotspo...

Python a 'hearty' eater

...ges after the reptile consumes a large meal. Hicks observed that the snake's oxygen consumption increased seven-fold within 24 to 48 hours after eating. This heightened metabolic state lasted for up to seven days and was accompanied by a rapid remodeling of the ventricle--the lower portion of the blood-pumpin...

Bobbing birds do it for a reason

...nn Olsen of the Patuxent Wildlife Research Center, observed how foraging whooping cranes control head-bobbing as they search for food in the grass near their feet. The tallest birds in North America--their eyes can be more than 5 feet above the ground--whooping cranes exhibit high-amplitude head movements dur...

Nature provides inspiration for important new adhesive

...day from their rocky home at the ocean's edge. Li observed mussels being pounded by ocean waves, and wondered how they could cling so tenaciously to rocks by their thread-like tentacles. "I was amazed at the ability of these small mollusks to attach themselves so strongly to rocks," said Li, who is an exper...

Hydrogen and methane provide raw energy for life at 'Lost City'

...e the tubeworms, abundant shrimp and other readily observed organisms that heavily blanket some black smokers. The high diversity revealed itself only after a 2003 expedition when the biology team led by Woods Hole Oceanographic Institution's Timothy Shank analyzed water samples "vacuumed" from around the ven...

'Smart drug' targets deadly brain cancer

...ent was well tolerated, and imaging responses were observed in a significant portion (36 percent) of patients with recurrent glioblastoma multiforme participating in this study -- which is a high response rate for this very resistant disease. These early results suggest that we are on to a promising new treat...

Ancient immune defense mechanism is no match for HIV-1

... a primitive defense mechanism that was previously observed only in plants and invertebrates. The research also reveals exactly how HIV-1 successfully thwarts this rare form of immunity in vertebrate cells. However, elucidation of the mechanism HIV-1 uses to protect itself provides some critical insight into ...

Analysis Of Human Genome To Predict The Development Of Illnesses

...nd molecules with a similar sequence to theirs are observed in order to deduce their function and to classify them in the same order as the molecules already known. The project also includes all genes and proteins ordered according to their behaviour in determined circumstances. To this end, it compares the ...

Researchers Find New Technique To Identify Fetal Genetic Material From Amniotic Fluid

...write: "The intriguing gene expression differences observed suggest that this technology could facilitate the advancement of human developmental research, as well as the cultivation of new biomarkers for assessment of the living fetus." ### (JAMA. 2005; 293:836-842. Available post-embargo at JAMA.com) Edit...

Scientists identify genes responsible for 'black rot' disease in vegetables

...esponding to these strain-specific genes, and they observed significant differences in the response of each host species to infection. The authors point out that these findings highlight the role of genome dynamics in the evolution of pathogenicity in Xcc in response to different host species. ...

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