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Tag: "rates" at biology news

Radioactive scorpion venom for fighting cancer

...gns for treating the tumor and prolonging survival rates for patients. At the Health Physics Society meeting this week in Providence, Rhode Island, Alan M. Jackson of the Henry Ford Health System in Detroit will report that he and his colleagues recently established safe procedures for the therapy, ...

Mushrooms as good an antioxidant source as more colorful veggies

... oxidative damage. Anti-oxidants inhibit increased rates of oxidation, which can damage proteins, lipids carbohydrates and DNA. She adds, "The ORAC assay does not tell what happens in the human body but this assay is currently under investigation as to how it can predict physiological activity." The Pe...

Production of key Alzheimer's protein monitored for first time in humans

...sitive way to monitor the production and clearance rates of amyloid beta peptide (Abeta) in the human centr...rchers had assumed that the creation and clearance rates for Abeta were very slow. But the initial test of the new technique, applied to six healthy voluntee...

Ancient global warming drove early primates' dispersal

...nge during dispersal are near the maximum for such rates observed today, and the rapid change and dispersal were almost certainly driven by profound greenhouse warming at the Paleocene-Eocene boundary." ...

Matrilin-3 gene discovered to prevent onset of osteoarthritis

...e had higher bone mineral density (BMD) and higher rates of osteoarthritis. In people, BMD is a hallmark of certain forms of osteoarthritis. Compared with mice whose genes had not been altered, the mice lacking matrilin-3 showed significantly higher BMD both in the knee joint and throughout the body at 1...

Rehydrate -- your RNA needs it

...te where the chemical reaction occurs---affect the rates at which the enzyme changes conformation and catal...ow quickly the ribozyme switched forms and how the rates changed when various parts of the molecule were altered. The situation in ribozymes contrasts with...

UC Davis researchers move biotechnology closer to replacing electronic pacemakers

...potentially lethal arrhythmias, such as slow heart rates or rhythms called bradycardias. In the current s...ir anatomy and physiology, including average heart rates of about 70 to 80 beats per minute, are similar to humans. In the current study, researchers used...

Five surprising facts about starvation that could change the international agenda

...nalyzed countries with the highest child mortality rates and child wasting rates. Based on their assessment...te that "as the pandemic progresses, high HIV/AIDS rates will contribute to worsening nutrition, both from the direct effects of the disease and from an indi...

Chromosomal abnormalities in sperm higher after vasectomy reversal

...uch as a vasectomy). He found that they had high rates of chromosomal aneuploidy (where an abnormal numbe...sed a lot of questions, so we decided to study the rates of these abnormalities in ejaculated sperm after vasectomy reversal. If these sperm continued to ha...

Can biological traits predict diversification rates in birds?

...nd that bird families with high seasonal dispersal rates and very general feeding patterns also had the highest species diversification rates. ...

Septum keeps neurons in synch, can reduce epileptic seizures by 90 percent

...tal neurons of epileptic rats doubled their firing rates in relation to the controls, from about 14 spikes per second to about 29 spikes per second. Two promising lines of research Colom and his fellow researchers at the University of Texas at Brownsville/Texas Southmost College are looking at two dif...

Novel therapy combinations gain ground in treating hepatitis

...her-dose combination arms had much better response rates than the control group, experiencing on average a ... have shown that with 48 weeks of therapy, relapse rates are near 20 to 30 percent, but with an extended duration of 72 weeks, rates may be reduced. The res...

New GI technologies improve internal organ visualization

...etecting sources of intestinal bleeding. Efficacy rates for DBE and CE were comparable in detecting ulcers, blood vessel abnormalities that cause bleeding and large masses, but DBE was more effective in detecting mucosal and submucosal polyps. DBE was also a more lengthy process, averaging 94 minutes, wh...

Study finds that a woman's chances of having twins can be modified by diet

...ent study, when Dr. Steinman compared the twinning rates of women who ate a regular diet, vegetarian diet w... programmed to make more IGF than others. Twinning rates in these demographic groups parallel the IGF levels. "This study shows for the first time that the ...

New egg freezing technique offers hope to hundreds of women

... Cryotop method, we can achieve post-thaw survival rates for oocytes of 90-95%, making oocyte cryopreservat...iques for freezing oocytes have a very low success rates in terms of viable pregnancies per frozen oocyte. This is probably due to basic biological differenc...

How healthy is that marsh? Biologists count parasites

...shape. 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 a...

Even a little cooling helps after cardiac arrest

...shape. 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 a...

Recombination protein dynamics observed with single monomer resolution

...stigator. "With that, we can determine the kinetic rates for reactions occurring at either end of the protein filament." During the recombination process, RecA binds with DNA to form a filament that spirals around the DNA. The filament can grow in either direction, and can advance on the DNA by growing a...

New stem-cell findings can help the body to cure itself

...ne, one of the organs in the body with the highest rates of cell renewal. "We also know that blood, brain and skin stem cells express the genes that we now know to be important in the intestine," he says. "This suggests that the cell production mechanism can be the same for these stem cells too." The nex...

Wild vs. lab rodent comparison supports hygiene hypothesis

... societies that greatly stress hygiene have higher rates of allergy and autoimmune diseases than do people ...es that people in "hygienic" societies have higher rates of allergy and perhaps autoimmune disease because they -- and hence their immune systems -- have not...

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