Tag: "pass" at biology news

Mathematics Reveals New Pattern Of Brain Cell Activity

... The cells bounce back after they are released and pass the signal alongby suppressing other cells. Scientists observed inhibitory signaling amongbrain cells in the past, but assumed it couldn’t produce the smoothwaves that mark synchronous brain activities such as sleep. “We thought an inhib...

Scientists Seek Early Warning Of Drinking Water Threats

...ler than crypto- organisms which could more easily pass through some water-treatmenttechnology. Other pathogens can be very resistant to the standard chemicaltreatment of chlorination. The study will also help gauge performance of new water treatment technologies,which are becoming increasingly sophistica...

UPMC Reports On New Liver Assist Device

...e polymermembranes. The membranes allow toxins to pass through, but prevents proteins,and other cell byproducts from the pig cells to get into the patient's blood. "Initially, the agreement between UPMC and Excorp allowed researchers togather engineering and pre-clinical information about the d...

High-Altitude Cerebral Edema Likely Caused By Leaks In Blood-Brain Barrier

...ormal conditions, allow only certain substances to pass into the brain's circulation. John A. Krasney, Ph.D., UB professor of physiology and a specialist in hypoxia, will present the findings here today (April 28, 1998) at the 66th annual meeting of the American Association of Neurological Surgeons i...

Pediatric Academic Societies Report Progress In Children's Health

...ted compactedprotein/DNA complexes small enough to pass through the disrupted barrier,enabling them to deliver genes to the brain globally for the first time. Dr.Yiannis A. Ioannou, lead researcher and assistant professor of human genetics,gene therapy and molecular medicine at Mount Sinai School of Medi...

HIV Discriminates Amongst Cells

...olecules on the surface of thecell have tails that pass through the cell membrane and project into the cell. Through additional connecting proteins, actin can pull together the tails ofproteins projecting through the cell membrane so that they cluster together onthe outer surface of the cell. Two of thes...

Biosphere Lessons Can Be Applied To Space, Former Crew Co-Captain Says

... with Biosphere 2, nothing but ambiant light could pass throughthe barrier, requiring the base to provide the atmosphere, water and nutrientsto keep the operators of the base going. About one fourth of the crew's time was spent on managing theagricultural fields. Food preparation took 12 percent o...

Study Shows Athletes Get No Kick From Nasal Strips

...n athlete chasing a hockey puck or going out for a pass -- changes from breathing through the nose to breathing through the mouth as the demand for oxygen increases. A nasal strip would have to extend an athlete's time to switch point beyond that reached normally during exercise to be of any benefit. ...

Scientists Trace The Origin Of "Idaho Potatoes"

... least in a slightly solubleform, and it must also pass through at least one cellular membrane in itsmovement from soil to plant, according to Idaho researcher Kim A. Anderson. Dr. Anderson said that a model with a database of nearly l,000 potatoes has beendeveloped, and the accuracy of the classificati...

New Biomaterial Has 'Star' Power

...olymer remains in that configuration. Later, if we pass the same drug or protein over the gel, the polymer recognizes the molecule and binds to it." In her experiments, Keys imprinted a gel with the drug proxyphylline, a bronchodilator used to increase the lungs' ability to take in air. Her results s...

Who Needs Flowers? Transgenic Plants Sprout Embryos On Leaves

...However, these hybrid offspring don't consistently pass thosequalities down to their offspring. But embryo farming could produce "artificial seeds" thatwould all be clones of the hybrid parent and perpetuate itsstrengths, said Harada and another author of the study,biologist Bob Goldberg of UCLA. "If the ...

Banking On Safer Drinking Water

...arby. River water drawnfrom these wells must first pass through hundreds of feet ofsoil, which serves as a natural filter. How effective are river banks as a cleansing agent? Scientists atHopkins have launched a three-year study to find out. Theresearchers want to determine how well river-bank filtrationr...

Groundwater Injection Process Filters Out Contaminants

...arge barrier about 150 feet wide forgroundwater to pass through as it flows toward the river. As the groundwatercrosses the barrier, targeted contaminants are destroyed or immobilized. After about 30 hours, sodium sulfate, a nontoxic byproduct, is removedover a one-week period. Unlike pump and t...

Little Known Protein Prevents Formation Of Kidney Stones In Trace Amounts

...e in the Western Hemisphere form them. Most people pass microscopiccalcium oxalate crystals with their urine before they can grow into dangerousmasses. "It is the natural fate of supersaturated solutions to grow crystals,"says Asplin. "Something must be working to prevent this in the kidneys." ...

Genetically-Altered Crops Can Produce Tough, Hard-To-Kill Weeds

...pecialized traits like herbicide resistance -- can pass theirtraits on to nearby weeds via hybridization. These hybrid, transgenic weedsresist the herbicides that were designed to kill them. "When a crop grows near its weedy relative, it's inevitable that thegenetically-engineered trait will mov...

New Class Of Protease Inhibitors May Be Effective In Treating One Of Latin America's Most Devastating Diseases

...s can be distributed for human use, they stillmust pass additional toxicology and safety studies which are currently underway. According to McKerrow, the preliminary results are promising. If approved bythe Food and Drug Administration (FDA), McKerrow says the drug should berelatively inexpensive. Co-inv...

Study Finds Evidence Linking The Brain's Cognitive Control Regions With Stress Control Regions

...ieve that signalssent from this area first have to pass through the hypothalamus before reachingthe PVN. Researchers used snippets of antisense RNA to locate an enzyme calledglutamic acid decarboxylase (GAD) in the brain. GAD speeds production of aninhibitory chemical transmitter called gamma-am...

Putting Doesn't Pollute, Research Finds

...ses -- fungicides applied to golf greens -- do not pass into surface waterrunoff or leach into ground water, researchers said today (Wednesday 8/26) atthe American Chemical Society meeting in Boston. Ronald Turco, professor of agronomy and director of Purdue University'sEnvironmental Sciences and Engi...

Study Pinpoints Rare Molecular 'Transitions' As Possible Cause Of Skin 'Photoaging'

...y, so most of thephotons (particles of light) will pass through," he said. "But, every now andthen, it will grab a photon. And when it does, there's a good chance that'sgoing to make singlet oxygen. "The initiating molecule has a weak efficiency for absorbing the light,but when it does, it's highl...

For Fruit Flies, Finding The Right Mate May Mean Offspring With A Longer Life Span, According To New Study

... fitness components and how femalesselect mates to pass them on to offspring. And finally, many previous studieshave focused largely on observable appearance and how it relates to femalechoosiness or male attractiveness. "We attempted to avoid each of these potential pitfalls by using anartificial...

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