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shrink in Biological News

Bird brains shrink from exposure to contaminants

The regions in robins' brains responsible for singing and mating are shrinking when exposed to high levels of DDT, says new University of Alberta research--the first proof that natural exposure to a contaminant damages the brain of a wild animal. "These residues have been persisting since the l...

Fatty spheres loaded with siRNA shrink ovarian cancer tumors in preclinical trial

A molecular "off" switch packaged in a tiny sphere penetrates deeply into ovarian cancer tumor cells, stifling a troublesome protein and drastically reducing the size of tumors, researchers at The University of Texas M. D. Anderson Cancer Center report in the Aug. 15 edition of Clinical Cancer Rese...

Mice brains shrink during winter, impairing some learning and memory

The brains of one species of mouse actually shrink during the winter, causing the mice to have more difficulty with some types of learning, a new study found. The results showed that, during the short days of winter, white-footed mice had impaired spatial memory ?the mental map that helps them r...

Jet-propelled imaging for an ultrafast light source

...gas to make a co-flowing liquid sheath. By adjusting gas and liquid pressure and other parameters, he was able to create a "virtual nozzle" that could shrink the diameter of the liquid jet to a thread so small it would not clog the physical aperture of the tube. In effect, the gas sheath acts to focus the l...

After dinosaurs, mammals rise but their genomes get smaller

... BLOOMINGTON, Ind. -- Evidence buried in the chromosomes of animals and plants strongly suggests only one group -- mammals -- have seen their genomes shrink after the dinosaurs' extinction. What's more, that trend continues today, say Indiana University Bloomington scientists in the first issue of a new jo...

U-M researcher and colleagues predict large 2009 Gulf of Mexico 'dead zone'

...the Gulf, low water flows into the Chesapeake Bay shaped Scavia's 2009 forecast for that hypoxia zone. The Bay's oxygen-starved zone is expected to shrink to between 0.7 and 1.8 cubic miles, with a "most likely" volume of 1.2 cubic miles---the lowest level since 2001 and third-lowest on record. The drop ...

Liver disease 'shrunk' by blood-pressure drug

... failure. Half of the patients in the trial saw the scars in their liver shrink allowing the organ to repair itself. Professor Derek Mann from Newcastle...se other than transplantation. This early stage trial has shown that we can shrink liver scarring in some patients and shows promise for a treatment that coul...

New drug shows promise in treating drug-resistant prostate cancer

... the mice," Sawyers said. "While treating these animals with bicalutamide produced a modest effect on their tumors, the new drugs caused the tumors to shrink dramatically, and in some animals almost completely." Sawyers said the new drugs bind tightly enough to the natural hormone-binding site on andr...

New medications show promise in treating drug-resistant prostate cancer

... the mice," said Sawyers. "While treating these animals with bicalutamide produced a modest effect on their tumors, the new drugs caused the tumors to shrink dramatically, and in some animals almost completely," he said. Sawyers said the new drugs bind tightly enough to the natural hormone-binding site on...

Stanford researchers develop biodegradable substitutes for wood, plastic bottles and other materials

... Stanford University researchers have developed a synthetic wood substitute that may one day save trees, reduce greenhouse gas emissions and shrink landfills. The faux lumber is made from a new biodegradable plastic that could be used in a variety of building materials and perhaps replace the p...

Stroma genomic signature predicts resistance to anthracyclin-based chemotherapy in breast cancer

...ng the tumor were more likely to have a bad response to this particular chemotherapy." "What this means is that success in treatment, having tumors shrink or disappear altogether, is in part due to molecular differences in tumors and their immediate surroundings," Dr Farmer continued. Researchers ho...

Tension in the nanoworld

...d mobility in strained silicon. By controlled straining of silicon, the properties of the free carriers can be designed, which is essential to further shrink and speed-up future computer chips. For both development and quality control, the quantitative and reliable mapping of the carrier mobility is strongl...

Evolutionary process more detailed than previously believed, study shows

...ao saw some colors expand while others contracted a sign that adaptations were occurring. But rather than one segment of the population continuing to shrink until it was completely replaced, some segments were able to compete long enough to acquire further adaptations. When this happened, Kao explained, th...

Dirty snow causes early runoff in Cascades, Rockies

... RICHLAND, Wash. -- Soot from pollution causes winter snowpacks to warm, shrink and warm some more. This continuous cycle sends snowmelt streaming down mountains as much as a month early, a new study finds. How pollution affects a...

Phoenix conference highlights TGen's and Scottsdale Healthcare's contributions to molecular oncology

... to help cancer doctors provide better diagnosis, early detection as well as drugs and other treatments that in some cases can slow the growth or even shrink tumors. "Given the explosion of new information on the genetic and cellular features of malignancy, the modern oncologist must master the significa...

TGen, Scottsdale Healthcare, Mayo Clinic study new drug to stimulate immune system of cancer victims

...ult of advanced cancer. The hope is that this new drug will actually help enable the immune system to slow down the growth of tumors, and perhaps even shrink them, Dr. Ramanathan said. VTX-2337 is the first drug of its kind developed by San Diego-based VentiRx Pharmaceuticals Inc. The biopharmaceutical c...

UC Davis team refines cancer treatments to reduce potential nerve damage

... (SACRAMENTO, Calif.) While radiation treatments deliver precise doses of high-energy X-rays to stop cancer cells from spreading or to shrink tumors, oncologists have become increasingly concerned about inadvertent exposures during head and neck cancer treatments to nerves responsible for up...

JHU chemists devise self-assembling 'organic wires'

...e semiconductor industry is actively developing smaller and smaller transistors, so, too, are those involved with organic electronics devising ways to shrink the features of their materials, so they can be better utilized in bioelectronic applications such as those above. To this end, a team of chemists ...

Global warming threatens Australia's iconic kangaroos

...ure increase as small as a half-degree Celsius may shrink kangaroos' geographic ranges. An increase of two degrees may shrink kangaroos' ranges by 48 percent. A six-degree increase might shrink ranges by 96 percent. Ritchie says that general...

NJIT professor's research suggests changes in underwater data communications

... canals. Not only would they increase the speed and reliability of data reception, but more importantly, by going to Abdi's system manufacturers could shrink the size of the receiver receiving the data. "Today existing receivers rely upon separated pressure-only sensors that are spaced far apart," Abdi ...

The making of Dig It! the Secrets of Soil exhibit

...etation in calcareous clays and marls Houston Black soils can be used for cropland - grain sorghum, cotton, corn, small grain, forage grasses; high shrink swell limits site development. In the two months since the exhibit opened, an estimated 300,000 people have been though the exhibition. Visitor res...

Arctic ice on the verge of another all-time low

... summer's record minimum ice cover in the Arctic, current observations from ESA's Envisat satellite suggest that the extent of polar sea-ice may again shrink to a level very close to that of last year. Envisat observations from mid-August depict that a new record of low sea-ice coverage could be reached ...

American Chemical Society's Weekly PressPac -- Aug. 13, 2008

...opening the doors to profound new applications for communications and defense. But before the first micro-spacecraft can blast off, scientists need to shrink the titanic thermal regulation systems used to help prevent today's ships from frying in the harsh sunlight of space or freezing in the pitch black a...

In Vietnam, alongside progress, a battle for life

...nt seen family or friends in months. Enlisting Partners in the Fight Radiotherapy is a powerful tool in the treatment of breast cancer. It can shrink tumours, kill off stray cancer cells, and enhance survival in advanced cases. But with only 22 radiotherapy machines nationwide, Vietnam falls parlous...

During Olympics, Cornell's Max Zhang studies air-quality in Beijing

...t. When particles are emitted from the tailpipe of a car, they can be 50 nanometers. But after traveling just 100 meters (11 yards), the particles can shrink to about 20 nanometers. "In that short distance, the particles you are breathing are very different from what's being emitted," said Zhang, who is ...

Climate change could severely impact California's unique native plants

...e set of projections assumed that plants can easily relocate, while another assumed that they cannot migrate at all by 2100, so their ranges will only shrink as climate changes. Loarie emphasized that there are many uncertainties in the analysis - for example, in the known range of individual plants; in ...

UNH receives $380,000 grant to study organic dairy as closed ecosystem

...elp small family dairy farms in the Northeast survive economic vulnerabilities. The study comes as rising energy, feed and capital investment costs shrink the already narrow profit margin of dairy agriculture in the Northeast, threatening the regional sustainability of the industry. "In a closed system, ...

Retraining immune cells to kill tumors

...tumors, the tumor-friendly cells went on the attack. These cells also secreted proteins that attracted professional tumor-killing cells that helped to shrink the tumors. The researchers are now conducting clinical trials to determine whether macrophages from cancer patients can be similarly reprogrammed int...

More than words: childbirth training change improves safety, cuts unnecessary procedures

...gina and rectum during childbirth. They were also able to increase the use of the hormone oxytocin which is given to mothers to make their uterus shrink and bleed less to manage the third stage of labor, when the placenta detaches and passes from the uterus and hemorrhaging may occur. At the star...

Crop management strategies key to a healthy Gulf, planet

...ls at different scales to interpret the data. Understanding these intermediate layers is crucial to filtering out the noise and figuring out how to shrink the hypoxic zone, Dale said. The approach were developing considers aspects of the landscape, including environmental and socioeconomic conditions, th...

Genetic variant mimics effect of heart failure medications

...ump. In some patients, beta-blockers allow the heart to get some relief from the overactive pumping, develop a more normal cellular structure, and shrink in size. They do this by blocking or toning down the fight or flight response. Beta-blockers are a standard, highly effective therapy in some, but not...

Needle-size device created to track tumors, radiation dose

...o fit inside a large-diameter needle for injection with a syringe. The current size is small enough to be used in tumors, but researchers will work to shrink the device to about half a millimeter in diameter and half its current length, roughly the size of a rice grain, said Ziaie, who is working with Byung...

Sand dollar larvae use cloning to 'make change,' confound predators

...aid Dawn Vaughn, a UW biology doctoral student at the University of Washington's Friday Harbor Laboratories. The process caused the original larvae to shrink from about 300 microns, or about a hundredth of an inch, to about half that size, and the new larvae were even smaller. "We think that by reducing...

Carnegie Mellon researchers create invisibiity cloak

... In a recent edition of Advanced Materials Magazine, the researchers demonstrate that controlling the structure of nanoparticles can shrink their visible size by a factor of thousands without affecting a particles actual physical dimension. What we are doing is cre...

Madagascar's tortoises are crawling toward extinction, groups say

...n Madagascars capital city Antananarivo, said there is still hope to save these ancient animals, but time is running out as their habitat continues to shrink and illegal hunting worsens. Five of the nine assessed species have been downgraded to critically endangered, with one variety the ploughshare torto...

'Smart' holograms help patients help themselves

...our credit card, are stored on photo-sensitive materials and remain unchanged with time. Smart holograms, however, use materials called hydrogels that shrink or swell in response to local environmental conditions. Such holograms can therefore be used as sensors to detect chemical imbalances in potentially f...

Positron emission tomography superior to standard evaluation tools in measuring treatment response

... tumors that have not changed in size with treatment or have even grown, but are completely dead on pathologic analysis. Just because the tumor doesnt shrink doesnt mean the treatment didnt work. Eilber and his team of top scientists, including PET scan inventor Michael Phelps, wanted to find a better w...

Skull survey could improve vehicle safety

... Women's skulls are thicker than men's, but they both shrink slowly after we reach adulthood. That's the conclusion of a new imaging study of 3000 people published in the Inderscience International Journal of Ve...

American Chemical Society's weekly PressPac -- Jan. 2, 2008

... Jan. 14 issue of ACS Biomacromolecules, a bi-monthly journal. In the study, Bruno Clair and colleagues point out that whereas normal wood tends to shrink a small amount when dried, TW undergoes surprisingly high shrinkage. This shrinkage makes it undesirable for use in sun decks and other construction a...

Stanford researchers say climate change will significantly increase impending bird extinctions

...eir habitats slowly shift to higher elevations, driven by rising temperatures worldwide. The answer, unfortunately, is you can't go anywhere. Habitats shrink to the vanishing point, and species go extinct. That scenario is likely to be played out repeatedly and at an accelerating rate as the world contin...
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Breaking Biology News(10 mins):Methane climate change risk suggested by proof of redox cycling of humic substances 2Rapid and accurate mRNA detection in plant tissues 2Some immune cells defend only 1 organ 2
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Breaking Medicine News(10 mins):Health News:New pain relief targets discovered 2Health News:CU researchers discover target for treating dengue fever 2Health News:Patients with rare lung disease face agonizing treatment dilemma 2Health News:Patients with rare lung disease face agonizing treatment dilemma 3Health News:BUSM researchers find anti-seizure drug may reduce alcohol consumption 2Health News:Animal study provides first evidence that gel can prevent multiple virus transmission in vagina/rectum 2
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