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Tag: "observed" at biology news

Venom doc tracks down snake bioweapons

...ed. Despite the differences in tissue origin, Fry observed that all toxins were derived from protein families...va production in the snake venom glands. Fry also observed that the proteins most frequently recruited and modified into toxins where those with a very stable ...

Natural Killers Could Lead to New Hepatitis Treatments

...s in response to a signal.?/p> The researchers observed that the roving NKT cells stopped their movement when alerted by a foreign protein, called an antigen, “We think this is a reflection of their normal function of searching for antigen,?said Littman. “Whenever there is detection of antigen reflecting ...

Atmosphere may cleanse itself better than previously thought

...cals the team studied have for the first time been observed to produce air-scrubbing OH radicals at low ultraviolet wavelengths. This observation has eluded science primarily because photochemistry at these wavelengths has been difficult to study. "Thanks to an innovative laser technique that at last allows ...

Unlike other mammals, newborn dolphins and orcas stay active 24/7 during first months of development

... potential for coping without sleep." Researchers observed two adult female killer whales and their calves at Shamu Stadium at SeaWorld San Diego and four dolphins and their calves housed at the Gelendgick Dolphinarium and the Utrish Marine Mammal Research Station in the Black Sea region of Russia. ...

Sponges as drugs

...rcher tried to rear 9 of the 151 species of sponge observed but was successful with only 3 species. Although the survival rates of these species were generally very high, the growth rates were very slow and unpredictable. Moreover, the reared sponges produced less of the biologically-active substances than th...

Climatologists discover deep-sea secret

...will react to climate change. The scientists have observed that at several periods in history when the temper...nisms linking the two hemispheres had already been observed in computer climate simulations, but this is the first time they have been confirmed with detailed d...

Chronic Sinus Infection Thought To Be Tissue Issue, Mayo Clinic Scientists Show It's Snot

...f the tissue and attached mucus, the investigators observed an abundance of major basic protein throughout the nasal and sinus mucus in all 22 specimens, but not in the tissue. Chronic sinus infection is one of the most common chronic diseases in the United States, affecting 32 million adults, according to t...

Antiretroviral Therapy May Prevent HIV Transmission From Breastfeeding Mothers To Infants

...n samples of the infants' blood, the investigators observed high, inhibitory concentrations of nevirapine that were above those thought necessary to protect against HIV infection. Dr. Shapiro and colleagues hypothesized that the presence of antiretroviral drugs in breast milk may reduce mother-to-child transm...

Certain fish have a special mating preference

...ions made easier by the lack of predators. He also observed that the mosquitofish with larger genitalia had slower burst speeds compared with those of smaller genitalia types. In the laboratory Langerhans took offspring of Texas mosquitofish from both environments and ran a common-garden experiment ?in which...

IMF Launches World’s First DNA Database for Myeloma Patients

...ions made easier by the lack of predators. He also observed that the mosquitofish with larger genitalia had slower burst speeds compared with those of smaller genitalia types. In the laboratory Langerhans took offspring of Texas mosquitofish from both environments and ran a common-garden experiment ?in which...

Improved statistical tools reveal many linked loci

... more than one genetic location contributes to the observed trait, such as blood pressure or cell growth. The new statistical method bypasses the previously overwhelming computations needed to puzzle together the myriad elements that influence gene expression throughout an entire genome. And unlike earlier a...

Chickadees can help humans get their bearings

...they re-enter a hallway in a hotel. "This has been observed in every species tested, even when landmarks alone could be used, suggesting that animals are predisposed to go by geometry," said co-author Dr. Chris Sturdy, a professor of psychology and member of the Centre for Neuroscience at the University of Al...

Bioinformatics reveals new gene regulation system

...g or repressing expression of Nrd genes. The team observed that their signal always overlapped with the promoter signal, the region of DNA required for the initiation of the conversion of gene to protein. Molecules that promote transcription recognize and bind to this sequence, which lies just outside of the...

Molecular steps involved in the creation of gene-silencing microRNAs identified

...rotein of interest to scientists. "TRBP was first observed as a protein that binds to HIV during transcription of the virus," says Shiekhattar. "The tantalizing implication is that the RNA interference pathway may play a significant role in HIV replication. TRBP has also been identified as a tumor suppressor...

Modified collagen could yield important medical applications

...They attached fluorescent tags to the peptides and observed the glow in collagen that had been mixed with the smaller molecules. Exactly how and why the collagen and the peptides join is uncertain. But researchers know that collagen molecules form a distinctive triple-helix in which three long protein strands...

Unusual antibiotics show promise against deadly 'superbugs'

...They attached fluorescent tags to the peptides and observed the glow in collagen that had been mixed with the smaller molecules. Exactly how and why the collagen and the peptides join is uncertain. But researchers know that collagen molecules form a distinctive triple-helix in which three long protein strands...

Understanding biases in epidemic models important when making public health predictions

...butions of the infectious period in the models, we observed very different epidemic curves," said the researcher. Conversations with Wearing and Keeling followed, alternative models were compared and data from an influenza outbreak were used to illustrate the potential bias in model predictions. The impact o...

Inhaling large amounts of salt can cause hypertension

...butions of the infectious period in the models, we observed very different epidemic curves," said the researcher. Conversations with Wearing and Keeling followed, alternative models were compared and data from an influenza outbreak were used to illustrate the potential bias in model predictions. The impact o...

Field of beams - Novel system uses polarized light pulses to reveal crop health

...butions of the infectious period in the models, we observed very different epidemic curves," said the researcher. Conversations with Wearing and Keeling followed, alternative models were compared and data from an influenza outbreak were used to illustrate the potential bias in model predictions. The impact o...

Fluorescing lab worms signal longer life spans

...lder researchers attribute the life span variation observed in the genetically identical worms in the study to...-16. "HSP-16 alone is probably not responsible for observed differences in survival, but instead is likely reflective of a hidden, heterogeneous, but now quanti...

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