Fool An Egg Into Thinking It's Fertilised, And It Will Repel All Comers
...t. Existing birth control methods, such as barrier contraceptives andhormones, all have their drawbacks. So researchers have turned their attentionto biochemical interactions between sperm and eggs. Blocking these interactionscould prevent fertilisation. So far, scientists have identified at least th...Estuaries Vital To The Productivity Of Southeastern U.S. Fisheries
...e outward water movement there is restrictedby the barrier island chain known as the Outer Banks. Both scenarios would make estuaries another kind of nutrient source forocean life in addition to the well-known upwelling zones off California, Africaand Chile, he said. Crowder's bottom li...Duke Scientists Engineer 'Stealth Virus' To Deliver Genes
... They believe their achievement overcomes a major barrier to widespreaduse of adenovirus, a common cold virus, as a genetic delivery vehicle. Their results were published in the February issue of the journal HumanGene Therapy. The research was supported by grants from the NationalInstitutes of Hea......rans Affairs Medical Center have observed a second barrier that apparentlyprevents passage of agents from the blood to the brain. The primary barrier is agood thing in a healthy person, but this barrier also keeps drugs such ascancer-fighting chemoth...U.S. In The Midst Of A Heroin Epidemic, But Many Overdose Deaths Can Be Prevented
...ublein the fat cells so it crosses the blood-brain barrier within 15-20 seconds,rapidly achieving a high level in the brain and central nervous system, whichaccounts for both the 'rush' experienced by users and the toxicity." Heroin produces its effects by acting on key receptors in the central nervoussyste...1999 Spring Meeting: Information For Media Representatives
...ch erosion andreplenishment, development issues on barrier islands, and related scientific andpublic policy questions, which she will discuss in this special presentation forher colleagues in the media. Dean will also discuss the process of writing andpublishing a popular book about science. (Against the Tid...Media Advisory: 1999 Spring Meeting -- Updated Press Conference Schedule
...ch erosion andreplenishment, development issues on barrier islands, and related scientific andpublic policy questions, which she will discuss in this special presentation forher colleagues in the media. She will also discuss the process of writing andpublishing a popular book about science. ("Against the Tid...University of Hawaii scientists announce first male clone
...l term,Yanagimachi called the low survival rate "a barrier that still can be overcome." The research is important because it shows that animals of either sex can becloned and that somatic cells (non reproductive cells) can be used. "Preciousanimals of either sex"for example, endangered species and transgenic...Nonexponential rates support idea of protein folding 'funnel'
...ein folding is not characterized by just oneenergy barrier with a single time scale," Gruebele said. "Rather, there aremultiple states en route downhill to the native state, resulting in many timescales." These results are not incompatible with what researchers have seen before,Gruebele said. "In the past, e...Breast cancer cells shown to migrate toward hormone source - novel mechanism for metastasis seen
... source in cell culture and even crossa membranous barrier to reach the source. Also revealed was that the prolactin-induced motion of breast cancercells is accompanied by corresponding changes in the cellular machineryresponsible for motion. The experiments demonstrated that prolactin triggers thefo...SFVAMC-UCSF scientists solve a key protein structure
...s that any structures havebeen determined. A major barrier to studying the structure of membrane proteins is that they aredifficult to obtain in a pure form suitable for crystallization. To obtainenough of the protein, the researchers turned to the E. coli bacterium, whichwas genetically manipulated to prod...Science panel endorses new non-animal test to see if chemicals will burn, corrode skin and eyes
...or chemical mixture is placed on a collagen matrix barrier that serves as a kindof artificial skin. Once it p... time ittakes for a test chemical to penetrate the barrier and produce a color change inthe detection system is compared to a classification chart to determine......f a rat can cross thenearly impassable blood-brain barrier and can stop the chemical reaction in thebrain tha...'s also getting past the blood-brain barrier. This barrier blocks theaction of many drugs on brain cells, making diseases that affect the brain oftenso difficu...Report in PNAS on role of nephrin, the kidney filter protein
...nizes and maintains the integrity of thefiltration barrier as well as a porous filtration structure that allo...s). Nephrin's key role in the kidney's filtration barrier suggests thattreatments which increase the production of this protein or restore its functionare lik...CWRU physicists invent "supershielding" for MRI devices
...ession has been carried out by positioning an iron barrier or a set of secondary coils outside the maincoil that produces the original unshielded field. In each case, the field is left alive inside where it is needed to do its work. Brown says that Picker International, a pioneer in computerized axial tomogr...Factor for acquiring skin barrier function identified
...itical factornecessary for the skin to acquire its barrier function--the ability to keepwater in and microbes...es forpremature babies whose skin has not acquired barrier function. Barrier function is acquired in humans during the ninth month of pregnancy. Premature babi...USGS scientists tracking Hurricane Bret's effects
...re and other areas to study coastal erosion on the barrier island;measuring the effects of the storm on wildlife and habitat; studying anywater-quality impacts; measuring storm surge. As the nation's largest water, earth and biological science and civilian mappingagency the USGS works in cooperation with m...Fragment of AIDS virus may be used to deliver therapeutic proteins to cells
... to cross the blood-brain barrier. The blood-brain barrier isa layer of tightly packed cells designed to keep...inutes," explained Dowdy. Crossing the blood-brain barrier seemed to takelonger, but even this difficult task was complete within four hours. In designing dru......videncethat mercury can circumvent the blood-brain barrier that usually prevents suchtoxins from entering the brain. Their studies were with brown and rainbow trout- two of the most popular species for anglers and fish consumers - but may haveimplications for humans and other species as well, they say. The s...