Taking The "Ouch" Out Of Needles: Arrays Of "Microneedles" Offer New Technique For Drug Delivery
...cessor-basedequipment. "This system could provide constant communication between the drug reservoirand the inside of the body," he explained. "Using a microprocessor to control apump would allow the deviceto be programmed to deliver a drug at variable rates. The pump could also becontrolled by the patient ...Feature: Biomaterials Are Transforming Medicine
...to deliver growth hormones and methods toprovide a constant release of insulin for diabetics. Fortune magazine citedestimates that these new technologies will cause sales in the drug-deliverysector to almost triple, reaching $25 billion by 2006. For medicines like insulin, research is also exploring ...Fossil Evidence Of Worms Over One Billion Years Old Reported In Science
...the diameters varyfrom tunnel to tunnel but remain constant along each individual tunnel. Thetunnels also do not resemble the structures commonly caused by physicalprocesses and are similar to younger trace fossils known to be produced bytriploblastic animals (animals that developed from an embryo and that co...Mouse Model For Huntington's Disease Developed By NIH, Vanderbilt
...tsell said. "They become quiterestless, then begin constant circling. After a time, they gradually slow down,become inactive and lose interest in their surroundings. Then they becomevirtually inert and die. "There is a remarkable correlation between the genotype -- which HD gene wasexpressed -- and the behavi...Four More Lemurs To Be Released Into Madagascar Jungle This Fall
...unding the Betampona Reserve, for example, isunder constant pressure from illegal logging, burning and over-farming. Theproblem is critical for lemurs' futures because all lemur species are nativeonly to Madagascar. The MFG, headquartered at the San Francisco Zoo, was formed in 1988 tocoordinate conse...Fewer Songbirds May Be Result Of Forest Fragmentation Across The American South, New Study Suggests
...all species. Predation from small species remained constant nomatter what the fragment size. Thus it appears that songbirds nesting in small forest fragments bear anincreased burden of predation, and reproductive success is thus affected,sometimes dramatically. Worse, the clustering of nest sites in s......to 99 percent was destroyed again, and there was a constant disappearing andevolving," said Dr. Juergen Wiegel, a microbiologist at the University ofGeorgia. "A lot of different evolutionary roots probably came from the samepools." The arguments concerning thermophiles by Wiegel and numerous otherscien...Molecular Mechanism For Evolution Described
...nbe stabilized in the population without requiring constant changes in Hsp90 or the environment." Lindquist speculates that Hsp 90 may be a key player in controllingthe alternation between long periods of genetic stability and the suddenbursts of morphological change seen in the fossil record during times whe...Science Announces Top Ten Research Advances Of 1998
...n's firstinstincts; the energy of the cosmological constant could be providing therepulsive force necessary to propel the increasingly rapid expansion of theuniverse. As the world's leading peer-reviewed general science journal, Science isuniquely suited to draw from a diverse array of scientific fields in or...Wetting Of Structured Or Imprinted Surfaces - Zooming Down Onto The Nanoscale
...ngtransition between two different morphologies of constant mean curvature. Thislatter transition can only occur because the contact angles of the channel donot satisfy the classical Young equation. As far as applications are concerned, the presence of this transition makes itimpossible to construct long homo...Flexible Membranes - Moving Through The Twilight Zone Between The Nano- And The Microworld
...te the bendingrigidity, the most important elastic constant which enters the description onthe micrometer scale. This elastic constant was extracted from a detailedanalysis of thermally-excited membrane fluctuations. Surprisingly, the ...Technology Reduces Reliance On Fungicides For Grape Growers
...lem like powderymildew. Powdery mildew has been a constant challenge in California vineyardsfor more than a century. Now, with the help of University of California plantpathologists, growers can effectively control the powdery mildew in theirorchards through the increase of technology and decrease of chemica...Large Gene Study Questions Cambrian Explosion
...uences to find those that developed mutations at a constant rate over time. "Because mutations start occurring...r genes that had accumulated mutations at a fairly constant rate relativeto one another during their evolution. The genes were from species representingthree m...Baby Dolphin "Little Orphan Annie" Loses Battle For Her Life
... mammals. While at Harbor Branch, "Annie" received constant around the clock care andobservation from a very d...hroughout, he stayed with us at poolside providing constant care andcommunication to a consulting staff of medical experts. Never in my 30 years ofworking with ...Largest Acoustics Meeting In History Expected
...of a short note. They found that the ratio was not constant for fast and slow sounds, butinstead varied greatly with the tempo: ranging from 3.5 to 1 for slow tempos to roughly 1 to 1 for fast tempos. Interestingly, they found the length of the short note was about the same for all tempos--about a tenth of a...... change any given species undergoes, is relatively constant over time.Thus, a measurement of the genetic difference between any pair of species wouldreveal how long ago their ancestral lineages went their separate ways. The fossil record shows species continually give rise to new species andcontinually die of...Taking The Animal Out Of Animal Testing
...ess boost. Hesays the wealth of new ideas from the constant influx of energetic studentscreates a dynamic positive atmosphere in which to do business. The units, which retail at about $40,000 apiece, are in use in Japan, Germanyand Taiwan, as well as in several U.S. Universities and biotechnology companiessuc...Tumor Oxygen Level And Blood Flow Fluctuate, Duke Scientists Discover
...treatments, radiation andchemotherapy, depend on a constant high oxygen level and steady blood flowwithin a tumor, scientists said. "These fluctuations in oxygen level and bloodflow are not predictable and might represent an impediment to radiation therapyand drug therapy," said Mark Dewhirst, co-director of...... environment and the life it supportsdepend on the constant recycling of certain key elements, such as carbon,nitrogen, and sulfur. Microorganisms are major contributors to this recyclingbecause they facilitate critical reactions known as reduction and oxidation.These reactions enable the easy transfer of ele...Report: High Carbon Dioxide Boosts Duke Forest Growth By 25 Percent
...s open on the righttowers to keep the distribution constant within all parts of each plot,regardless of wind direction and speed. The experiment is "fully replicated," meaning that it is being repeatedat three locations. Three other identical tower ringed forest plots that receiveno extra CO2 are servi...