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Tag: "suspected" at biology news

Marine mammals are on the frontline of failing ocean health

...l bloom. "This is surprising," he says. "We never suspected that there could be vectors like seagrass or fish....thought to feed mainly on salmon in Alaska are now suspected to be feeding on high trophic-level fish, such as shark or tuna, in California during the winter. U...

Duck-billed dino crests not linked to sense of smell

...crests had nothing to do with what many scientists suspected -- the sense of smell. Speculation about their function has led to theories that the crests functioned as everything from brain coolers to snorkels for underwater feeding. Now, David Evans, a PhD student in zoology at the University of Toronto at Mi...

Enzyme inhibitors block replication of SARS virus

...s, known as a coronavirus. The SARS coronavirus is suspected of originating in animal populations before migrating to humans. Hardest-hit were six Asian nations. By the time the epidemic had been controlled in 2003, the disease infected more than 8,000 people, causing 800 deaths. There is no current effective ...

'Virus chip' detects new virus in prostate tumors

... case of these prostate tissues, no one would have suspected a virus of this class." DeRisi is a UCSF associate professor of biochemistry and co-leader of the study with Don Ganem, MD, also an HHMI investigator at UCSF and a professor of microbiology and immunology. Klein reported the discovery today (Febru...

Whole-genome study at Johns Hopkins reveals a new gene associated with abnormal heart rhythm

...e gene called NOS1AP, not previously flagged by or suspected from more traditional gene-hunting approaches, app... scratch and not looking at genes already known or suspected to be involved in heart rhythm. "Studying individual genes is not going to open new areas of resea...

MicroRNA may have fail-safe role in limb development

...evolution. More recently, this genetic material is suspected to be part of an intricate mechanism that helps repress about one-third of our 25,000 genes. It has been linked to diabetes, hepatitis C, leukemia, lymphoma and breast cancer. But only now have microRNAs been connected to actual growth processes. "...

The brain is broadly wired for reproduction

...rol cognitive function. I don't think anyone ever suspected this complexity. It reveals that GnRH neurons are master integrators of information about the external environment, as well as the internal state of the animal." The studies also suggest that GnRH neurons influence a wide array of brain functions, p...

Brainstem blocks pain to protect key behaviors

... to monitor brain activity in feeding rats. The suspected source of pain relief was a cluster of cells in the VMM. In 1979, Howard Fields of the University of California at San Francisco identified two groups of neurons in the brain stem that could enhance or inhibit pain. Neurons that "facilitate" pain, w...

New understanding of regeneration gained by Forsyth scientists

...ead and the upper section a tail. Scientists have suspected that the ability of previously adjacent cells (on either side of the cut) to adopt radically different fates, as is the case with planaria where the cells have to decide whether to build a head or a tail, could be due to long-range signaling, which a...

Same-sex mating by fungi spawned infection outbreak, evidence suggests

...ften in association with Eucalyptus trees. "It is suspected that the infectious propagules of Cryptococcus are airborne spores," Heitman said. "Such spores are produced during sexual reproduction, though mating of the fungus has never been observed in nature." In plants and animals, sexual identity is govern...

Rutgers researchers scientifically link dancing ability to mate quality

...symmetry. "At least since Darwin, scientists have suspected that dance so often plays a role in courtship because dance quality tracks with mate quality," said Lee Cronk, associate professor of anthropology. "But this has been hard to study because of the difficulty of isolating dance movements from variables...

Bacteria which sense the Earth's magnetic field

... and mussel shells. Thus, the scientists initially suspected MamJ is responsible for the development of magnetite crystals. Although it is difficult to cultivate and manipulate Magnetospirillum gryphiswaldense in the laboratory, as part of his doctoral work André Scheffel succeeded in removing the relevant ge...

U. of Colorado researcher identifies tracks of swimming dinosaur in Wyoming

...eanographic Center in Dania Beach, Fla., have long suspected that some sea lilies are able to move around. In previous work, the researchers found that some sea lilies regularly shed and regenerate the ends of their stalks. Interestingly, the stalks don't break off just anywhere, but at particular nodes, just ...

Creeping crinoids! Sea lilies crawl to escape predators, new video shows

...eanographic Center in Dania Beach, Fla., have long suspected that some sea lilies are able to move around. In previous work, the researchers found that some sea lilies regularly shed and regenerate the ends of their stalks. Interestingly, the stalks don't break off just anywhere, but at particular nodes, just ...

PLoS Medicine publishes first trial of effect of male circumcision on HIV infection

...rgely non-circumcised populations, researchers had suspected that circumcision might offer some protection against HIV transmission. However, because the lower infection rates in the circumcised groups might be due to some other difference between circumcised and uncircumcised populations, the only way to test...

An essential regulator of body weight revealed

...outi-related protein (AgRP). Researchers have long suspected NPY/AgRP neurons to be important regulators of feeding behavior, acting in opposition to POMC neurons to stimulate appetite. But genetic experiments designed to tease out exactly how NPY/AgRP neurons triggered feeding had failed to do show any direct...

New study shows measles immunization may prevent fatal brain infection

... notion. Brain tissue specimens from 11 patients suspected of having SSPE were examined. Five of the 11 patients with samples and 7 additional SSPE patients identified in case reports were related to infections during the resurgence of measles in the United States during a drop in measles vaccination rates b...

Scientists get first glimpse at how plants, most animals repair UV-damaged DNA

...experimental evidence of what scientists have long suspected -- that visible light excites the photolyase molecule and boosts the energy of electrons in its atoms. This in turn enables the enzyme to inject an electron into the DNA molecule at the UV damage site temporarily to perform repairs. They also report...

New results validating Pall prion reduction filter disclosed at ISBT Congress

... person with vCJD and Portugal announced its first suspected human case. The UK Haemophilia Society also issued a warning to 6,000 people with hemophilia that they could have caught the disease through infected blood. In the U.S., a second cow just tested positive for BSE. "Considering the lengthy, asymptomat...

UW-Madison scientists zero in on drugs' sweet spots

...plant and used to stimulate the heart. The drug is suspected to have anti-cancer properties, but its use to treat cancer has been little explored. The new work is important because it provides scientists and drug companies with a quick and easy way to manipulate the sugars found in chemicals produced in natur...

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