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Tag: "experimental" at biology news

AIDS-related cognitive impairment exists in two separate forms

...all in the "gray zone" of traditional tests. This experimental "universal bead array" test, which is designed to be low cost and easy to administer, appears to be a better predictor of relapse and disease-free survival than the Gleason Score, according to lead author Jessica Wang-Rodriguez, M.D., associate clini...

Alaska seal pup diet may hold key to decline of population

... in the diet of young, growing seals to see if our experimental seals reflect changes observed in wild populations and could explain the rapid population declines seen since the 1970s." Low fat or high fat diet The study began in 2004 with four one-month-old newly weaned female harbor seals, the animals most ...

Just the expectation of a mirthful laughter experience boosts endorphins 27 percent, HGH 87 percent

...effects. According to Berk: "The blood drawn from experimental subjects just before they watched the video had 27... which group they were randomly selected to be in, experimental (video watching) or control (no video watching). All subjects had blood drawn just before the video ...

Heat-shock protein vaccine reduces alveolar bone loss

... Rats were immunized with P. gingivalis HSP60, and experimental alveolar bone loss was induced by infection with multiple periodontopathogenic bacteria. There was a very strong inverse relationship between post-immune anti-P. gingivalis HSP immunoglobulin G levels and the amount of alveolar bone loss induced by ...

Study shows hope for ridding lakes of clawed invader

...hope, say Vander Zanden and Carpenter, is that the experimental techniques used on Sparkling Lake can be transferred to other lakes with the help of the many lake associations in Wisconsin. The Wisconsin scientists have addressed lake associations and found a receptive audience. "We have talked to lake associat...

Researchers map out networks that determine cell fate

... lineages. Until recently, however, there was no experimental system that researchers could manipulate to solve this puzzle. A few years ago, Singh and colleagues identified a transcription factor called PU.1 that acts as the primary signal, a central genetic switch to initiate development of myeloid progenitor...

Radioactive scorpion venom for fighting cancer

...s are establishing safe procedures for a promising experimental brain-cancer therapy which uses a radioactive vers...at kills the cell. This compound has enabled an experimental treatment for high-grade gliomas, found in 17,000 people in the US every year and usually causing de...

Study finds how organs monitor themselves during early development

...erstand how the ovary does this." There were no experimental tools to let her study the entire process. She needed to be able to test many genes, many conditions, and find markers of those conditions so the results would be visible under the microscope every step of the way. Over several years, Dr. Gilboa deve...

How can identical twins be genetically different?

...sease outcomes. Identical twins represent the best experimental system to address this question," says Joseph Holoshitz, M.D., an associate professor of internal medicine at U-M Medical School and co-author of the study. The advantage of studying twins is that they start out with the exact same genetic informat...

Food-crop yields in future greenhouse-gas conditions lower than expected

...ffects on photosynthesis. The FACE data came from experimental wheat and sorghum fields at Maricopa, Ariz.; grasslands at Eschikon, Switzerland; managed pasture at Bulls, New Zealand; rice at Shizukuishi, Japan; and soybean and corn crops at Illinois. In three key production measures, involving four crops, the a...

How plants avoid feeling the burn

...nt/abstract/0600593103v1 ). "This is a remarkable experimental tour-de-force and the result is quite unexpected,"...ns found in the plant," said Fisher. To make the experimental measurements, Fisher first needed to work out several technically challenging variations to a method...

RNA interference stops colon cancer spread in mice

...ancers, and suppress the spread of colon cancer in experimental animals," said UTMB professor of surgery B. Mark Evers, senior author of a paper on the research published in the June issue of Annals of Surgery. "Over the last couple of years people have talked a lot about cell-culture studies of siRNAs, but only ...

Device effective in zapping the pain out of migraines

...ating disease. Results of a study found that the experimental device appears to be effective in eliminating the headache when administered during the onset of the migraine. The study, led by the Ohio State University Medical Center neurology investigators, was presented Thursday (6/22) at the annual American ...

It's all in the genes

... ecosystems in the wild. They have planted several experimental "common gardens" of cottonwoods in Arizona and Utah. The trees are propagated at NAU's research greenhouse. Through DNA fingerprinting, the scientists know the precise genetic makeup of each tree. In one experiment, Whitham's group worked with the B...

Hopkins researchers develop new tool to watch real-time chemical activity in cells

...ists at Johns Hopkins to create a new tool and new experimental approach that allow them to see multiple, real-time chemical reactions in living cells. Their report on the work is published July 21 in the journal ACS Chemical Biology. Most current drug development operations test chemicals on enzymes isolated...

First study to show how immune cells 'speak' to each other in vivo

...immune responses. The findings will allow further experimental exploration of immunological synaptic function during normal and pathological immune responses in vivo. The full study can be accessed at www.jem.org . WHY: The mechanism of how immunological synapses "speak" to each other in vivo has not be...

New egg freezing technique offers hope to hundreds of women

..."Even although oocyte freezing is still considered experimental by the scientific community, nowadays in our centre it is routinely proposed to patients as an alternative to disposing of any surplus oocytes. Surplus oocytes become available in 78.5% of IVF cycles." Her research into the potential of freeze-thawi...

Cultural transmission in bats: When listening for dinner, bats learn from their neighbors

...earchers tested the effectiveness of learning this experimental association through three different means: (a) a s...ich two inexperienced bats were presented with the experimental task together; and (c) a trial-and-error group, in which a single inexperienced bat was presented wi...

Experimental RNA-based drug kills prostate cancer cells effectively and safely

Acting as a genetic Trojan horse, an experimental RNA-based drug -- the first of its kind -- tricks ...hor James McNamara, Ph.D. a postdoctoral fellow in experimental surgery. "It provides a 'proof of principle' that an entirely RNA-based drug can work with minimal s...

Cells use mix-and-match approach to tailor regulation of genes

...transcription factor-gene associations, plus other experimental evidence that indicates that that gene regulates a second gene. To enlarge the scope of the model further, Ideker's group also incorporated other previously discovered transcription-factor interactions and related genetic results. They relied on a t...

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