Tag: "weak" at biology news
New Zealand tops environmental scorecard at World Economic Forum in Davos
...a, Chad and Niger--are underdeveloped nations with weak
regulatory systems and with little capacity to invest in environmental infrastructure such as drinking water and sanitation systems. The 2006 EPI generates a number of policy conclusions. Wealth and a country's level of economic development emerge as...
Growth hormone, obesity can trigger sleep apnea in some kids
...mbination of starting growth hormone, still having weak
muscle tone, having an illness and/or being obese ... the findings show. The children's muscles were so weak
at the beginning of the treatment they couldn't breathe with a stuffed-up nose, Miller said. Growth ...
Nobelist discovers antidepressant protein in mouse brain
...xamined the effect of treatments designed to boost weak
serotonin systems on p11 levels in brain cells by administering to mice two types of antidepressants a tricyclic, a monoamine oxidase (MAO) inhibitor and electroconvulsive therapy (ECT). "These three different ways of treating depression all cause...
VCU Massey Cancer Center researchers identify a new class of anti-cancer drugs based on platinum
...hanced uptake into cancer cells takes advantage of weak
molecular interactions on the cells' surface. These results underscore the importance of the new compound's "non-covalent" interactions, prior to the attack on DNA. Non-covalent interactions minimize potential side reactions and produce changes in th...
A key that opens cells to the deadly malaria parasite
... features in atomic detail, we may be able to find weak
points that could make good targets for drugs." In addition to interfering with the binding process, such drugs would also have to be specific: in other words, they shouldn't interfere with normal processes in red blood cells. The receptor protein th...
Improved speech without vocal cords
...pt could be useful for female patients with a very weak
voice: it would strengthen their voice and enable ...or the time being only female patients with a very weak
voice would benefit from the new voice prosthesis: their voice becomes more powerful and once again ...
Researchers discover a protein responsible for shaping the nervous system
...iminating those that go to the wrong place or form weak
or improper connections. If this process does not happen, the nervous system cannot function properly. The expression of the p63 protein guides the nervous system in disposing of the ineffective nerve cells. The protein is from the p53 family of tumo...
Overfishing in inland waters reduces biodiversity and threatens health
...s worldwide but is largely unrecognized because of weak
reporting and because other pressures can obscure fishery declines, according to an article in the December 2005 issue of BioScience. Although the status of inland waters and their fish species should be of broad concern, threats to freshwater fisher...
Bacteria which sense the Earth's magnetic field
...e which orients the bacteria inside the relatively weak
magnetic field of the Earth. But until now, scientists did not know how magnetosome chains are formed. The research group of Dr Dirk Schler at the Max Planck Institute for Marine Microbiology has been investigating magnetosome formation in the magnet...
Change in neurons' responsiveness marks newly formed sensory associations during learning
...stimulus--the small shock--occurs, but show only a weak
activity in response to odors. Interestingly, after training, those cells respond with a prolonged activity toward the odor associated with the negative stimulus. In the course of training, the odor has acquired a negative relevance, which is reflect...
Turning sensation into perception
...n was on, while other times the vibrations were so weak
that the monkeys couldn't always detect them. The ...ptions, the researchers used an electrode to apply weak
electrical stimulation to MPC neurons. They found that stimulating these neurons made the monkeys m...
Teens with deletion syndrome confirm gene's role in psychosis
...is already compromised. If that copy is a met, its weak
enzyme action would likely expose their developing brains to excessive, potentially damaging prefrontal dopamine levels, with attendant adverse consequences, hypothesized the researchers at Stanford's Center for Interdisciplinary Brain Sciences Resea...
Cornell finds natural selection in humans
...nd out of the cell. These mutations are subject to weak
negative selection, according to the study. In general, negative selection eliminates from the population very harmful changes to proteins that kill or stop reproduction. But mutations that have led to slightly deleterious versions of the gene -- mut...
Magnetic nanoparticles assembled into long chains
...cles to form linear chains by subjecting them to a weak
magnetic field--about the same strength as a refrigerator magnet. The particles line up because the nanoparticles act like tiny bar magnets, all facing the same direction as the applied field. Once this alignment occurs, the attraction between partic...
Cell cultures can sort out CJD and scrapie infectious agents
...ity School of Medicine shows that infection with a weak
strain of Creutzfeldt-Jacob Disease (CJD) prevents... system or misfolded prions. Cells infected with a weak
strain of CJD were also protected from infection by two strains of sheep scrapie agent. "We demonstr...
Rare immune cell is key to transplant's cancer-killing effect
...ts from the U-M study indicate the response is too weak
to be effective. "APCs shred proteins, or antigens, from cancer cells and display those shredded proteins on their surface," Ferrara says. "Cancer cells have the same proteins, but haven't gone through the APC's shredding process. It's as if APCs are...
Heme controls antioxidants and iron in ferritin
...iver cells. They found that iron, by itself, was a weak
signal by linking different pieces of ferritin DNA to a "reporter" gene and measuring the amount of reporter protein when cells were fed extra iron, heme, or sulforphane. Iron had practically no effect, but with heme or sulforphane much "reporter" wa...
Image of myosin-actin interaction revealed in cover story of Molecular Cell
...st time we were able to structurally visualize the weak
binding states of actin and myosin, not interpolat...to keep the protein on its actin track through the weak
binding phase of the processive movement. The detailed molecular knowledge of how myosin interacts t...
Learning how SARS spikes its quarry
...ion could also be helpful in identifying potential weak
points that can be exploited by novel antiviral drugs or vaccines. The SARS (severe acute respiratory syndrome) coronavirus was responsible for a worldwide outbreak in 2002-2003 that affected more than 8,000 people and killed 774 before being brough...
Chernobyl: The true scale of the accident
..." has led them to perceive themselves as helpless, weak
and lacking control over their future. This, in turn, has led either to over cautious behavior and exaggerated health concerns, or to reckless conduct, such as consumption of mushrooms, berries and game from areas still designated as highly contamin...
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