Tag: "scientists" at biology news

Two warbler species find the West isn't big enough for both of them

... it could be returned to the UW for analysis. The scientists found substantially higher androgen levels in both the Townsend's warblers and the hybrid species than in the hermit, which could explain why the hermit has consistently, over thousands of years, lost its territory to the Townsend's. It also could ex...

The truth about organic food

...ia Downtown at 21 Juniper St. In the presentations scientists will offer answers to these questions and others: Are pesticide risks real or imagined? Does food irradiation pose health risks? Is genetically modified food unsafe? Is organic food more nutritious? Are free-range chickens safer? Is organ...

UCSD biologists develop 'super-endurance' strain of mice

...24 issue of the online journal PLoS Biology , the scientists say the inability of these genetically modified mi...longer periods than their normal counterparts, the scientists discovered that their super-endurance capabilities appear to be only temporary and come at a high pr...

Improving crops without genetic modification natural variation holds the key

...y so much. With the advent of biotechnology, plant scientists were buoyed by the prospect of improving plants through genetic modification. But aside from a few successes with introducing single-gene herbicide- and pest-resistant traits, most plant traits have proved too complex to repay the incorporation of a ...

Millennia still mean early days for newly identified sex chromosome

...le fish called the threespine stickleback may help scientists understand how sex chromosomes evolve. Researchers have found that threespine sticklebacks have a Y chromosome that is less than ten-million years old, which is quite young in evolutionary time. The evolution of a genetic sex-determination system is ...

Synthesized molecules studied as weapon to stop cell division in cancer cells

...i-cancer target. There is now a small community of scientists looking at inhibiting Pin1, but once it is validated as a target, more researchers will step in." Etzkorn's talk, "Protein mimics inhibit enzymes that regulate the cell cycle," will be presented at the Division of Organic Chemistry's Women in Organic...

Length of sex act in flies dictated by genetics

...of a 24-hour-day. The study was just published by scientists from Oregon State University in a professional journal, Current Biology, and reports a surprising new role for these clock-related genes. Mutations in the clock genes "period" and "timeless" caused male flies to copulate significantly longer than usu...

Carnegie Mellon scientists reveal ways of studying, resolving PCB contamination in US rivers

... down persistent, toxic PCBs. Now, Carnegie Mellon scientists have used DNA fingerprinting to discover distinct ...w, in a statistical tour-de-force, Carnegie Mellon scientists have developed a way to identify true shifts in specific PCB congener distributions over time in riv...

Anticancer drug zebularine specifically targets tumor cells

... cells, according to a group of researchers led by scientists from the Keck School of Medicine of the University...st 2004 issue of Cancer Cell . Only recently have scientists begun to recognize the important role that DNA methylation--the addition of a methyl group to a stre...

Gold quantum dots have applications in biological labeling, nanoscale optics

...op a mechanism for attaching them to proteins that scientists wish to track in cells. "We are continuing to investigate these quantum dots, to probe their fundamental photophysical and spectroscopic properties, and to develop different chemistries for functionalizing the scaffolding that encapsulates the nanocl...

Congress to fund Sequim-based coastal security research effort

...ature came from and predict where it's going. PNNL scientists will draw upon existing technologies and capabilit...arch benefiting from the new emphasis. "While PNNL scientists and engineers will apply what they've learned through environmental assessment research to our coast...

Why your knees and quads hurt more after running than walking: You're only human

...our unique patterns of limb kinematics, a group of scientists wanted to study exactly how that affects how we use our muscles while walking and running, and to better understand why it's more "efficient" to walk than to run. Harvard research finds five-fold increase in knee torque, muscle force The researchers,...

Testing the fitness of biological clocks

...cesses. Despite the important role that they play, scientists are just beginning to understand the benefits that these internal pacemakers provide when they work and the problems they cause when they malfunction. A study performed by researchers at Vanderbilt University and published in the Aug. 24 issue of the...

Researchers find clues about how antibodies specialize

...the Aug. 26 issue of the journal Nature, will help scientists better understand two things: how the body is able to mount a strong immune defense against foreign attackers, and how cancers, particularly lymphomas, develop and might be prevented. B lymphocytes, or B cells, are the immune-system cells responsibl...

In gene regulation, small is beautiful

...tificial transcription factors or ATFs, could help scientists probe gene regulation and perhaps lead to new treatment approaches. Both natural transcription factors and their artificial counterparts typically have two essential parts: a DNA-binding domain that homes in on the specific gene to be regulated, and ...

PCB breakdown in rivers depends on sediment-specific bacteria, find Carnegie Mellon U. scientists

...cteria. Now, a study by Carnegie Mellon University scientists provides convincing evidence that how quickly a PCB gets eaten and what it becomes depends on where it settles. Using DNA fingerprinting, the Carnegie Mellon team discovered distinct bacterial populations in the first-ever side-by-side comparison of ...

U of T study identifies possible stem cells in pancreas

...eir supervisor, Professor Derek van der Kooy. The scientists are now hoping to extend their research to prove that these precursor cells are truly stem cells. True stem cells must exhibit two properties: the ability to renew themselves over the entire life of the organism and some ability for the parent cell t...

Virus known for its photo ops makes its movie screen debut

...nsformed them into a brief animated movie, helping scientists understand how infection occurs and possibly enabl...d for fundamental science, but it also could allow scientists to alter the baseplate so that the virus could infect cells other than E. coli. T4 might then be use...

Illustrated guidebook published for Chinese biomedical scientists and students

...ng the top six countries of origin of foreign-born scientists and engineers employed in the U.S. Like many simil...sh Guide for Biomedical Scientists" was written by scientists at the U.S. Environmental Protection Agency in Maryland, Weidong Wu, Yuh-Chin Huang, Xinchao Wang, a...

Counting foxes before the last tally-ho

...an on hunting with dogs can be measured. A team of scientists and volunteers led by Professor Stephen Harris, from the University of Bristol, counted fox faeces in more than 400 one-kilometre squares across Britain. This information was combined with estimates of the number of faeces a fox produces each day, an...

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