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Tag: "variety" at biology news

PNAS study reveals why organs fail following massive trauma

... system. This second system pumps out an endless variety of immune cells on the hope that one or more will be the right shape to link up with, and become activated by, any invader encountered. When one of those immune cells, called lymphocytes, recognizes a bacterium or virus presented by the innate system...

New moth variety disarms plants guarded by selenium

...in the plant's natural habitat, a newly discovered variety of the invasive diamondback moth (Plutella xyloste...sarmed the plant's elemental defense. The new moth variety in fact thrives on plants containing highly toxic selenium levels and, in contrast to related variet...

Advance helps explain stem cell behavior

..." that help steer stem cells into forming the wide variety of cells that ultimately make up all the organs and parts of a living vertebrate animal. The findings were made using mouse embryonic spinal cord as a model, and will be announced this week in Proceedings of the National Academy of Sciences, a prof...

Molecular mechanism provides intra-cellular traffic signal

... said. "Malfunctioning of this pathway can cause a variety of human diseases. For example, problems in insulin secretion or presentation of insulin-receptors on the cell membrane result in diabetes. Defects in growth factor secretion and presentation of their receptors on cells result in cancer. Defects in n...

Researchers find docking sites for glucocorticoid receptor and Hsp90

...uced by the adrenal glands and are important for a variety of tissue-related activities. They are immune-suppressive and anti-inflammatory, and are prescribed for such conditions as adrenal insufficiency as in Addison's disease, arthritis, asthma, inflammatory bowel disease and childhood acute lymphoblastic ...

Study: Living coral reefs provide better protection from tsunami waves

...numbers, nor had they ever analyzed it over a wide variety of coastal shapes. This study provides yet another motivating factor for protecting the planet's coral reefs from degradation." The team's findings appear in the Dec. 14 edition of the journal, Geophysical Research Letters. In addition to Oppenheim...

Too mellow for our predatory world

...sts. Nowhere else is it possible to observe such a variety of different adaptation strategies in such a relatively small number of species. However, it is not only scientists who are drawn to the island; increasingly tourists have also discovered this unique archipelago. In 2005, approx. 126,000 people desce...

History-hunting geneticists can still follow familiar trail

...n protein diversity in the same species. A greater variety of proteins indicates more diverse DNA, because DNA contains a species' blueprints for manufacturing protein -- and the French scientists agreed that protein diversity did correlate with population size. All that remained for UF researchers to do ...

Temperament linked to onset of cancer and early death in female rats

...les lived longer. Because the male rats died of a variety of diseases, they could not establish a reason for the differences. The new study links personality specifically with cancer. ...

NASA study: Alaskan fires affected Houston air quality in 2004

...ers in a NASA-led field research project sampled a variety of trace gases and aerosols ?tiny particles suspended in the air ?across North America. That same summer, physicist Gary Morris, both an associate professor at Valpariaso and an adjunct assistant professor at Rice, launched the Tropospheric Ozone Pol...

Intrinsic eye protein halts angiogenesis

...ontaneously invade the cornea. They studied a wide variety of mammals and confirmed the effect in each species including humans. "The millenia-old mystery of corneal avascularity has been the subject of serious scientific inquiry for 50 years. The significance of this publication is that we have now identi...

Gene therapy research switches off joint inflammation; switches on genetic process of joint repair

...randomized controlled clinical trial will assess a variety of pain, mobility and functional assessments in subjects with moderate osteoarthritis of the knee. Prior to this clinical investigation Reparagen was found to be the first natural product to "silence" genes that promote joint damage while simultaneou...

A new understanding of how cells defend themselves against bacterial pore-forming toxins

...roving security force inside the cell, detecting a variety of danger signals such as bacterial RNA or bits of bacterial flagellin. The inflammasomes join together and activate a protein, caspase-1, that in turn triggers an inflammatory response. Van der Goot and her colleagues found that in addition to it...

Researchers reveal mystery of bacterial magnetism

...hysical Journal. Magnetic bacteria are found in a variety of aquatic environments, such as ponds and lakes. The strain of bacterium the research team studied, Magnetospirillum magneticum, was originally found in a pond in Tokyo, Japan. Magnetic bacteria typically live far below the surface, where oxygen i...

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

...that DNA damage accumulates with age in cells of a variety of tissue types. Breaks in the DNA chain have a variety of causes and occur frequently in the course of natural cellular processes. Repairing such breaks is...

Computer-based 'games' enhance mental function in patients with Alzheimer's

...ed system (IMIS) which allowed them to carry out a variety of different cognitive stimulation tasks at varying levels of difficulty throughout the day. IMIS sessions (20 minutes each) were held three times a week for 24 weeks. At baseline and after 12 and 24 weeks of treatment, participants were assessed ...

Researchers use multiphoton microscopy to watch chromosomes in action

...end that offers new potential for researchers in a variety of fields. "Interaction between the physical sciences and the life sciences is very powerful," said Webb. "And it's becoming more powerful as a tool for advancing our understanding of the life sciences." Better understanding transcription in lower ...

Mayo Clinic study suggests that a central nervous system viral infection can lead to memory deficits

...us family members cross into the brain and cause a variety of brain injuries. For example, the polio virus can cause paralysis. It can injure the spinal cord and different parts of the brain responsible for motor function. In the murine virus we studied, it did the same thing and also injured parts of the br...

UNC scientists solve mystery of how largest cellular motor protein powers movement

...tion and the American Heart Association. Using a variety of modeling techniques that allowed resolution at the level of atoms, Adrian W.R. Serohijos, a graduate student in Dokholyan’s lab and first author of the study, identified a flexible, spring-like “coiled-coil?region within dynein. It couples the mot...

St. Jude finds clues to hearing loss from chemotherapy

...St. Jude Children's Research Hospital. Mice with a variety of genetic mutations that disrupt different parts ...ies of mice whose offspring carry one or more of a variety of mutations that cause them to lose the ability to hear high-frequency sounds, according to Jian Zu...

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