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Tag: "tells" at biology news

New crop of technology reveals plant health

...her sensor detects chlorophyll fluorescence, which tells the system the rate at which the plant is absorbing energy. That reflects the current state of photosynthesis, itself a reflection of the plant's health. These sensors communicate their data through specially developed wireless transmitters. Scient...

Taking evolution's temperature: Researchers pinpoint the energy it takes to make a species

...sor of zoology with the UF Genetics Institute. "It tells us something about the fundamental mechanisms that shape biodiversity on the planet." Speciation - when animals or plants actually evolve into a new species - occurs when life forms with a common ancestor undergo substantial genetic change. Using a...

UF scientists discover evolutionary origin of fins, limbs

...ee these same mechanisms operating in lamprey fins tells us they must have been assembled in the median fin...on to build the first paired fins," Cohn said. "It tells us our own arms and legs have their evolutionary roots in the dorsal, caudal and anal fins of our fi...

New HIV study identifies high-risk subgroups of adolescents

... same time, and also vary by gender. “This study tells us that not all risky adolescents have the same risk behaviors and that the patterns seem to be different between boys and girls. It's also important because it suggests that programs designed for adolescents?specific risk profiles may be most useful...

Study reveals how ADHD drugs work in brain

...n treating ADHD," says Berridge, "In particular it tells us that if we want to produce new ADHD drugs, we need to target [neurotransmitter] transmission in the PFC." In the future, Berridge and his colleagues plan to look deeper within the PFC to gain more detailed insights into how ADHD meds act on nerve...

Hopkins researchers develop new tool to watch real-time chemical activity in cells

...d is a biosensor and simple testing procedure that tells if a particular enzyme - called PKA - that acts like a "switch" is "on" or "off" in a living cell. The group has been focused on trying to understand and interfere with this enzyme switch, because if the enzyme is turned on at the wrong time or at ...

Survivors of childhood polio do well decades later as they age

... not doing too badly compared to their peers. This tells us that the cause for the decline in muscle strength in polio survivors may be aging alone." Polio is a contagious, viral illness that peaked in the United States in 1952, when 3,000 people died of the disease. Mass immunizations in the mid-1950s...

How healthy is that marsh? Biologists count parasites

... For example, an estuary with high infection rates tells you that it is visited by many birds, and many types of birds." The goal of the Sea Grant project is to establish a baseline snail-trematode count in marshes, particularly those slated for restoration. By comparing worm statistics before and after a...

Even a little cooling helps after cardiac arrest

... For example, an estuary with high infection rates tells you that it is visited by many birds, and many types of birds." The goal of the Sea Grant project is to establish a baseline snail-trematode count in marshes, particularly those slated for restoration. By comparing worm statistics before and after a...

Study reveals how cells destroy faulty proteins in cystic fibrosis

...ation signal known as ubiquitin. The ubiquitin tag tells the cell to destroy the marked CFTR, a process overseen by a destroyer called the proteasome. This trash system is known as the ubiquitin proteasome pathway. "We've identified the trash collectors that recognize misfolded proteins, decide if they...

Scientists reverse evolution

... mechanisms and processes that evolution uses, and tells us more about how Mother Nature engineers life." The ability to reconstruct an ancient gene from descendant genes also raises the possibility of a new type of gene therapy, in which a portion of a related gene could be inserted into a disease-caus...

Bone marrow may restore cells lost in vision diseases

...at sight-robbing injuries or diseases. "What this tells us is for problems such as age-related macular degeneration, we should be able to harvest stem cells to help repair the damage," said senior author Edward Scott, Ph.D., a professor of molecular genetics at the UF Shands Cancer Center and director of ...

Medium is the message for stem cells in search of identities

...ems the niche doesn't just support these cells, it tells them what to become. It educates stem cells for a bright future." ...

Birds going extinct faster due to human activities

...ems the niche doesn't just support these cells, it tells them what to become. It educates stem cells for a bright future." ...

UCLA researchers develop T-cells from human embryonic stem cells

...iologist, and lead researcher on the study. "This tells you that you may be able to use human embryonic stem cells to treat T cell and other blood diseases. This could be a very important weapon in the fight against AIDS," Galic said. The study is available at http://www.pnas.org/papbyrecent.shtml . In...

Eat less, weigh more? Enzyme makes lean mice 'susceptible' to dietary fat

...Increasing malonyl-CoA in the hypothalamus somehow tells the cells in the body to break down fats for energy and the muscle cells to use more energy. Therefore, identifying molecules that interact with malonyl-CoA will help scientists understand how energy balance and body weight is controlled. "We are b...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

.... ''You'd want to have a way that's specific, that tells you which component is which. I'll put on my chemist hat now. When a chemist says, 'I know what's there,' he or she means, 'I know chemically what's there.' I know that this is cholesterol or this is sphingomyelin or this is some other molecule. You ...

Striking the right balance between excitation and inhibition

...ays: "The degree of Notch expression on one neuron tells the sibling cell that it cannot be the same thing. If it is up-regulated in one cell, Notch will be down-regulated in its sibling. "There are thousands of different kinds of neurons in our incredibly complex nervous system, and we don't understand ho...

History-hunting geneticists can still follow familiar trail

...ay be increasing or decreasing, the study of mtDNA tells us about the level of genetic diversity in a population, which is important in making conservation decisions on endangered species," Mulligan said. "If this approach were not credible, it could potentially have a bearing on future policy decisions, a...

Quality not quantity important for immune response to HIV

...against the disease. "Conventional medical wisdom tells us that the bigger the immune response, the more effective it will be in controlling HIV," says Professor Philip Goulder, a Wellcome Trust Senior Research Fellow in Clinical Science at the University of Oxford. "However, our study suggests that this ...

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