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Tag: "upon" at biology news

Rare Chinese frogs communicate by means of ultrasonic sound

...lling activity in which a male frog begins calling upon hearing calls from other frogs in the area. Six frogs responded to ultrasonic and audible sound ranges, with four responding with calls in both ranges. One frog called 18 times to ultrasonic calls, including four very telling rapid responses, Feng sa...

Chemical guidance of T cells leads to immunologic memory and long-term immunity

... in the terminal, they will look for their drivers upon arrival. Rather than hoping to run into each other by chance, the drivers crowd around the arrival gates and hold up signs that the passengers can read from a distance. Moreover, CD8+ T cells are chemically attracted to the cells that might activat...

Wrinkled membranes create novel drug-delivery system

...hnology. "And the amount of wrinkling is dependent upon the degree of membrane polymerization that took place." One problem that remains is how to cool the capsules without harming the surrounding tissue. The solution, Chaieb said, might lie in newly discovered nanoparticles that can be chilled through m...

Watching the brain switch off 'self'

..., but rather in allowing the individual to reflect upon sensory experiences, to judge their possible significance to the self, and, not less importantly for consciousness research, to allow the individual to report about the occurrence of his or her sensory experience to the outside world. "To conclude, ...

Sea coral's trick helps scientists tag proteins

... us to observe an efficient Dendra photoconversion upon illumination with intense blue light," Konstantin Lukyanov said. "We still have no clear explanation for why Dendra differs from other Kaede-like fluorescent proteins." Sergey Lukyanov pointed out that the ultraviolet light required to activate many...

Gene patterns in white blood cells quickly diagnose disease

...ions caused by biological threat agents (BTA) rely upon early diagnosis and rapid initiation of therapy. However, most methods for identifying pathogens or infectious agents in body fluids and tissues required that the pathogen proliferate to detectable and dangerous levels, thereby delaying diagnosis an...

In the mind's eye: How the brain makes a whole out of parts

...en, and our study suggests that this delay depends upon emerging signals for combinations of shape fragments. In a sense, the brain has to construct an internal representation of an object from disparate pieces." In the long term, understanding exactly how the brain processes information may lead to neur...

UW-Madison engineers squeeze secrets from proteins

...determine how much of a protein's stability change upon confinement to attribute to energy and how much to entropy. "This is the important part of the calculation," de Pablo adds. Protein stability is an incredibly important property in myriad applications, de Pablo says. Consider laundry detergent. A po...

Infections could contribute to adult brain tumours

... Dr Richard McNally at the University of Newcastle upon Tyne, was funded by Cancer Research UK, the Dutch ...the UK, they came from the University of Newcastle upon Tyne and The University of Manchester/Central Manchester and Manchester Children's University Hospit...

Ocean virus identified in human blood samples

... In donors who had evidence of liver damage based upon a liver enzyme test, and whose blood had been discarded as a result, 21 percent had antibodies to Vesivirus. In blood samples from persons who had been diagnosed with clinical hepatitis, 29 percent had antibodies to Vesivirus. In persons who prev...

Invasive species harms native hardwoods by killing soil fungus

...ative plants by thwarting the biological "friends" upon which they depend for growth. The work, which provides striking evidence for a unique process by which invaders harm native species, was conducted by researchers at Harvard University, the University of Guelph, the University of Montana, Purdue Unive...

UCLA scientists find male gene in brain area targeted by Parkinson's

... that the brain cells that produce dopamine depend upon a sex-specific gene to function properly," Vilain said. "We've also shown that SRY plays a central role not just in the male genitals, but also in regulating the brain." Vilain's lab used a rat model to study the effect of SRY on the brain. When the...

Fruit fly's beating heart helps identify human heart disease genes

... research, the American Heart Association bestowed upon Wolf its prestigious Louis N. and Arnold M. Katz Basic Research Prize in November during its annual scientific sessions. This is the second year in a row that a trainee in Rockman's lab has won the Katz prize. Last year, Naga Prasad, Ph.D. received t...

A link is found between morphine addiction and the tendency to explore

... to humans without the need to experiment directly upon them". This research, published in Behavioural Brain Research, may help to focus preventative strategies against addiction towards those most at risk, according to their personality. "The results could be particularly useful in prevention campaigns...

Computers to save unique type of American red squirrel

...me. Researchers from the University of Newcastle upon Tyne in England, working with The University of Arizona in the US, have developed a special computer model which in time will pinpoint the biggest threats to the rare Mount Graham Red Squirrel. Details of the model are published in the academic jou...

Patterns in genome organization may partially explain how microbial cells work

... are significant evolutionary constraints that act upon genomes organization as well as upon genome content. That interplay between organization and function can't be ignored if we want to gain...

Simple idea to dramatically improve dengue vaccinations

...pens when our immune system becomes overly reliant upon memory when recognizing diseases similar to those that it has seen before," said lead researcher Michael Deem, the John W. Cox Professor in Biochemical and Genetic Engineering and professor of physics and astronomy. "With diseases like HIV, influenza...

Technique makes it easier to see mouse embryo in all its glory

...udies in a much more quantitative way '" improving upon the safety of the products we find in our homes," Dr. Keller said. Dr. Keller and a colleague, Michael Beeuwsaert, founded a company called Numira Biosciences (www.numirabio.com) to patent and commercialize discoveries from Dr. Keller's laboratory...

Travelers can avoid jet lag by resetting their body clocks

...before flying would reduce the jet lag experienced upon arrival at the destination. The more days a person follows this procedure the less jet lag they will have on landing and the sooner they will adjust and feel no jet lag." ...

New technique puts brain-imaging research on its head

...e skull? Researchers and doctors long have relied upon crude approximations made from test dummy crashes or mathematical models that infer ?rather loosely ?what happens to the brain during traumatic brain injury or concussion. But the truth is that the state of the art in understanding brain deformatio...

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