Tag: "changed" at biology news

Vanderbilt Researcher: Human Brain Has Great Sense Of Timing

...nning clockwise or counterclockwise. Each pinwheel changed its directionof rotation at random time intervals. When a cluster of pinwheels changed theirdirections at the same time, they appeared to form a coherent shape that stoodout from the rema...

NICHD Researchers Discover Gene For Major Brain Structure

...ox genes, noted Dr. Westphal. Homeobox genes have changed littleduring the course of evolution and seem to fulfill similar functions, fromroundworm to man. Essentially, these genes pave the way for developing embryocells to later form organs and tissues. To conduct their experiment, the researchers...

Dietary Supplements Could Put A Stop To A Royal Curse

... had been available centuries ago, it maywell have changed the course of history. "Because of his illness, George III didnot do things he might have. He intended to rule Parliament and establish astrong monarchy," says Rshl. "Instead, the power of Parliament took rapidstrides during his reign."...

Reducing VOC: new polymer coating process combines high degree of flexibility with improved environmental properties

... "The properties of these molecules can be changed by altering not only the backbone of the polymer, but also the side groups of the polymer," Eckert added. "We have been able to make structural changes and get virtually any melting point we would like." The research team has w...

Scientists find first molecule that guides nerve cells through the brain

...apiece of septum to the gel, the migration pattern changed as the majority of themigrating cells traveled away from the direction of the septum. To determine whether this repulsive activity was due to Slit or some othersubstance from the septum, the researchers cultured pieces of subventricularzone with kid...

Congress briefs: International congress on ecosystem health

...'srangeland used for grazing cattle and sheep have changed over time and varydramatically across both climatic and geographical regions of the state. Medvitz will discuss interactions between livestock production and habitatmaintenance, as well as the conflicts and dilemmas surrounding the continuingproducti...

Transformation of normal human cells into cancer cells

...geneticallyengineered to express the two oncogenes changed appearance, but did nottransform into tumor cells. However, cell lines that expressed the telomerasegene in addition to the oncogenes developed into tumors. "One important conclusion from this study is that there are not an infinitenumber of cellu...

Purdue helps Indiana companies with pollution dilemma

... The U.S. Environmental Protection Agency has changed how it estimates theannual quantity of styrene that a company emits, in effect doubling itsestimates of emission levels. That could make it more difficult to meet federaland state air pollution regulations, says James R. Noonan, assistant directorfor...

DNA: A sloppier copier

...tions that may produceorganisms more suited to the changed environment," Goodman says. Based on earlier reports from Goodman's laboratory (strongly suggesting but notyet proving that the umu complex was a polymerase), other labs have alreadyfound analogous new polymerases that act as DNA copiers in humans. G...

World's biodiversity becoming extinct at levels rivaling Earth's past 'mass extinctions'

... at that time disappeared andthe character of life changed permanently. The current extinction rate is nowapproaching 1,000 times the background rate and may climb to 10,000 times thebackground rate during the next century, if present trends continue. According to the paper, species loss can be estimated e...

Enzyme-based method to isolate stem cells from umbilical cord blood shows promise

...work, the aldehyde dehydrogenase in the stem cells changed BAAA into BAA and thefluorescent tag built up inside the desired cells. After being treated with both BAAA and verapamil, the cord blood samples areprocessed by a computerized cell sorter, which shines a laser on one cell at atime and monitors the ...

UW professor's climate change theory leads to NASA mission

...g concern is the fact that the humanpopulation has changed the chemical composition of the entire atmosphere of theplanet." The best-documented change is a 30 percent increase in carbon dioxide during thelast century that, among other things, has triggered a fundamental change inphotosynthesis for all plants...

UT Southwestern researchers create mice with narcolepsy

...n nerve cells of the brain's lateral hypothalamus, changed the animals'habits. They found that the mice unexpectedly fell asleep in the middle of highactivity, said Dr. Masashi Yanagisawa, professor of molecular genetics andsenior author of the study. He and his colleagues last year discovered orexi...

Plants, pathogens engage in trench warfare

...1 protein. Instead, it seems that itreally hasn't changed for close to 10 million years, the age of the species'common ancestor" explains Eli Stahl, a graduate student in Bergelson's lab andan author of the paper. Bergelson and colleagues developed a trench warfare model in which resistant andsusceptible in...

Discovery sheds new light on species diversity in the ocean

...ematical calculation proved the world wasround and changed how people thought about their environment. In a similarfashion, two University of Rhode Island scientists and their Brown Universitycolleague have made a simple discovery that may force biologists, ecologists,and evolutionists to question some long-...

Consumers, health experts desire benefits of biotech foods and concur with current FDA labeling policy

... labeling only when thefood has been significantly changed or when a potential safety concern such asan unexpected food allergen has been introduced. However, no foods that wouldmandate such labeling are currently in the marketplace. While many of the current benefits may be taken for granted, Dr. Johnson...

Computers have had dramatic impact on chemistry

...t themselves, showing them how tocollect data. "It changed the climate, not only creating acceptance, butenha...ncerns: How do we know who entered the data or who changed it and why?"says Dessy. "While the Food and Drug Administration (FDA) is pushing firms toimplement e...

Study details genetic basis of aging -- and how it might be delayed

...fgenes -- less than 2 percent of those surveyed -- changed markedly. But thosegenes govern critical biologica...ses, protein repairand energy production, and they changed in big ways. "At the molecular level, normal aging looks like a state of chronic injury,"said Prolla...

Scientists suggest genetic shutdown links estrogen, heart disease

...ber of those genes -- around 4 or 5percent -- were changed by a process called methylation. Methylation isnature's equivalent of taping over a bar code so it can't be read; smallmolecules attach to a gene's "on switch," a stretch of DNA called the promoterregion, and shut the gene down. But in cl...

Study shows black churches can help improve healthy behaviors

...s good news becauseit shows eating patterns can be changed and that church activities are among themost effective ways of doing that. Similar efforts through schools and worksites have shown smaller effects on behavior. "We especially acknowledge and appreciate the invaluable contributionsof the part...

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