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ratchet in Medical News

UCSF Team Closer to Creating Safe Embryonic-Like Stem Cells

...em, they latch on, preventing the messenger RNA from being processed by the protein-making machines known as ribosomes. As such, microRNAs are able to ratchet down a cell's production of a given protein. Currently, Blelloch and his colleagues are working to replace all four transcription factors with mic...

UCSF team closer to creating safe embryonic-like stem cells

...em, they latch on, preventing the messenger RNA from being processed by the protein-making machines known as ribosomes. As such, microRNAs are able to ratchet down a cell's production of a given protein. Currently, Blelloch and his colleagues are working to replace all four transcription factors with micr...

Bill Clinton, Health Groups to Tackle Childhood Obesity

...its. The new alliance will also offer parents educational and nutritional information on tackling childhood obesity. The planned coverage is set to ratchet up to approximately 6.2 million children (25 percent of all overweight American children) by the end of three years. Observing that millions of Ame...

Frost & Sullivan - Consumer Preference for Healthy Bakery

...nts market to grow alongside. Manufacturers of bakery ingredients such as enzymes, flavors, fats, shortenings, leavening agents, and improvers have to ratchet up levels of innovation to enable more productive business outcomes. The Trend Analysis of Ingredients Applications in Indian Bakery Industry i...

Blue and Broke for the Holidays

... Economic woes ratchet up mental health problems already more common this time of year MONDAY, Dec. 22 (HealthDay News) --Sagging spirits, sagging economy. ...

Brain Patterns Predict Mistakes

...ty usually occurs to optimize a person's ability to maintain and complete tasks. However, before making of a mistake, this area was found to gradually ratchet down its activity. At the same time as frontal lobe action decreased, activity actually increased in a second grouping of several regions in the ba...

AXA Equitable Helps Americans Prepare for a Long Retirement

...an range from 4% to as much as 7% of the benefit base. Moreover, the owner may see increases in the withdrawal percentage if he or she experiences a ratchet during an age band change. For example, owners who are 45 to 59 years old may withdraw 4% of the benefit base. But, if good performance causes the ben...

American Heart Association President Urges Congress to Support Preventative Measures to Reduce Risk Factors for the Nation's No. 1 Killer

...many of the gains we've made to reduce cardiovascular disease deaths," said Jones, vice chancellor, University of Mississippi Medical Center. "We must ratchet up efforts to convince policymakers that a strong and sustained investment of government resources is essential." The association's 2008 Health Po...

Breast-Feeding Doesn't Contribute to Cavities

...dler tooth troubles more likely linked to poverty, maternal smoking, study says MONDAY, Oct. 1 (HealthDay News) -- Breast-feeding will not ratchet up the risk of toddler tooth decay, new research claims. Cavities affect one in four young children, but the contributing factors are more likely t...

Alvarado Hospital Files Countersuit Against Blue Shield

...are fewer, but larger, health plans in California today than existed 10 years ago, and these health plans are increasingly using their market share to ratchet down payments to hospitals and doctors. Blue Shield's aggressive tactics are threatening the existence of independent hospitals such as Alvarado." Th...
ratchet in Medical Products

Carbon fiber ratchet handle (on and off ratchet with cautery)

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ENDO CLINCH™ II 5 mm Instrument with On/Off Ratchet Switch

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ENDO GRASP™ 5 mm Instrument With on/off Ratchet Switch

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MultAcoice™™ Rongeur Handle With Ratchet and Monopolar Cautery

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MultAcoice™™ Ring Handle With Ratchet and Monopolar Cautery

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Optima III 45 Noninsulated Stabilizing Grasper, without ratchet

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Optima III 45 Noninsulated Cobra Grasper, without ratchet

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Optima III 45 Noninsulated Cobra Grasper, with ratchet

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Optima III 45 Noninsulated Stabilizing Grasper, with ratchet

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Optima III 45 Noninsulated Duck-Bill Grasper, without ratchet

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ratchet in Biological News

New method separates cancer cells from normal cells

...ding to a central reservoir, like spokes on a wheel, worked just as well separating cancer and non-cancerous cells. A stack of these radially arranged ratchet channels could be used to create a "cancer trap." "When implanted next to a tumor the particles would guide cancer cells, but not normal cells, in...

American Chemical Society's Weekly PressPac -- June 3, 2009

...genes in the body produce proteins involved in arthritis, cancer and a range of other disorders. Acting like an "on-off switch," the medications might ratchet up the production of proteins in genes working at abnormally low levels or shut off genes producing an abnormal protein linked to disease. Their repor...

MIT solves gravity-defying bird beak mystery

...pening and closing angles of the beak: Varying these angles by a few degrees can change the drop speed by a factor of 10, Quere said. The capillary ratchet also depends critically on the beak's wettability--a measure of a liquid's tendency to bead up into droplets or spread out to wet its surface. Oil is ...
ratchet in Biological Technology

Mice teeth explain the troubles with human wisdom teeth

...aled that the size and number of posterior molars depend on previously initiated molars. The mechanism, called an inhibitory cascade, acts much like a ratchet that cumulatively increases size differences of teeth along the jaw. By quantifying their experiments, the researchers constructed a simple mathematic...

File Swapping: Download at your own Risk

...remaining bandwidth can be used for file-sharing programs. "File-sharing packets have a certain profile on the network, and we have the ability to ratchet down access for that type of file," said Rust. He added that by limiting how much of the network that file sharing can consume, the school keeps the s...

Translating the language of capital-raising

...hich securities are sold at a lower price than originally paid by the holder of the right. Typically, anti-dilution provisions come in two types: full ratchet and weighted average. There are typically exceptions for the adjustment mechanism that carve out situations such as the issuance of certain employee ...
ratchet in Biological Definition

Muller's ratchet

In genetics , Muller 's ratchet is a hypothesis that explains how functionally important genes may be lost when organism's genes are only transmitted vertically, without recombination caused by sex . Exclusive vertical transfer occurs when the organism is an endosymbiont , e.g. a bacter...

Endosymbiont

... complementary theory as to why the bacteria may have lost genes, Muller's ratchet , is that since the endosymbionts are maternally transmitted and have no op...e journal. Nancy A. Moran (1996), Accelerated evolution and Muller’s ratchet in endosymbiotic bacteria, Proceedings of the National Academy of Science...

Endosymbiont

... complementary theory as to why the bacteria may have lost genes, Muller's ratchet , is that since the endosymbionts are maternally transmitted and have no op...e journal. Nancy A. Moran (1996), Accelerated evolution and Muller’s ratchet in endosymbiotic bacteria, Proceedings of the National Academy of Science...

Fitness landscape

...on rate is too high, or it may drift away from a peak it had already found. The process of drifting away from a peak is often referred to as Muller's ratchet . Fitness landscapes in evolutionary optimization Apart from the field of evolutionary biology, the concept of a fitness landscape has also gai...

Genetic recombination

... unbalanced recombination. Enzymes called recombinases catalyze this reaction. Recombination is the mechanism by which organisms avoid Muller's ratchet . Contents showTocToggle("show","hide") 1 Crossing over 1.1 Chemistry of crossover 1.2 Consequences of crossover 1.3 Prob...

Mutational meltdown

... a downward spiral and will go extinct eventually. See also : Muller's ratchet Further reading W. Gabriel, M. Lynch, and R. Burger (1993). Muller's ratchet and mutational meltdowns. Evolution 47: 1744-1757. M. Lynch, R. Burge...

Population genetics

...scape Founder effect Genotype-phenotype distinction Hardy-Weinberg principle Microevolution Molecular evolution Muller's ratchet Mutational meltdown Population bottleneck Selection Small population size Ewens's sampling formula References J. Be...
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