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Tag: "traditional" at biology news

New insight into regulation of blood stem cells

...differentiation have been difficult to study using traditional gene disruption methods because loss of genes thought to be critical for this process often results in embryonic death, making it impossible to study the role of the gene of interest in mature animals. Dr. Michael P. Cooke and colleagues from the Ge...

Researchers rein in regulatory RNAs

... to a single transcript that is expected under the traditional one gene-one transcript model. Furthermore, the SATs tended to be poly(A)-negative and enriched in the nucleus, which strongly suggests a functional role for these transcripts in gene regulation. Abe and Kiyosawa also evaluated four Arabidopsis SAT ...

Microbial forensics: The next great forensic challenge

...ommunity should be avidly sought, said Murch. "Our traditional system of robust scientific inquiry and peer revie...bility. At the same time, lessons learned from the traditional forensic community for comprehensive quality assurance guidelines should be adapted to build a base ...

Technique may allow cancer patients to freeze eggs, preserving fertility before starting treatment

...m being fertilized. U-M researchers looked beyond traditional techniques to a method of freezing cells called vi...he technology available in the clinic soon. "With traditional slow-freeze techniques, just over half the eggs survive the thawing process. Using vitrification, we...

Test for early detection of prostate cancer shows promise

... Brady Urological Institute at Johns Hopkins. The traditional two-step approach of PSA testing and digital rectal examination has helped doctors identify prostate tumors early, while the cancers can still be cured. But PSA testing, like many disease-screening procedures, misses some cases of cancer and in other...

Shift of weather patterns necessitates rethinking of reforestation methods

... "Some are 7 feet tall and taller. Compare that to traditional bare root/spring seedlings that have been left behind." As for spring plantings, both bare root and containerized seedlings had a 83 percent survival rate. The containerized seedlings were only slightly larger than the bare root plantings after two ...

New World founders small in number

...ration). Hey's approach addresses shortcomings in traditional population genetic studies that rely on just one gene and that assume that population sizes have been constant over time. Studying levels of DNA sequence variation at a single genomic region, or loci, can offer insight into the history of that gene, ...

Supercomputers to focus brains on AIDS dilemma

...SC) at UC San Diego. In 1999, related results from traditional x-ray crystallography studies of the structure of a complex between the HIV-1 integrase catalytic domain and an inhibitor pointed to the existence of only one site where inhibitors could bind. These studies indicated a single format for small inhibit...

The biggest family tree ever

...nes that are almost impossible to discover through traditional genealogical methods. In contrast to written historical records that can be lost or oral histories that can fall into disuse, the information stored in people's genes persists. Cusanovich had his own DNA analyzed, which helped him trace his family t...

Researchers make surprise discovery that some neurons can transmit three signals at once

...apses cooperate to activate NMDA receptors. In the traditional sense, when inhibitory synapses are mature, they would never release glutamate, nor would they be able to depolarize a cell, both of which are required for NMDA receptor activation. But, as if by design, during the exact period when the auditory brai...

Finding hidden invaders in a Hawaiian rain forest

...not be detected from above the forest canopy using traditional aircraft or satellite approaches, but the new methods are sensitive to its high water content. In addition, the aircraft-based analysis discovered that ginger reduces the amount of nitrogen in the Metrosideros forest canopy--a discovery that was late...

Scripps scientists find potential for catastrophic shifts in Pacific ecosystems

...ractical purposes wiggles that are best modeled by traditional statistical approaches. "The dynamics are the same during warm and cold periods, thus they are not true regimes," said Sugihara of the Physical Oceanography Research Division at Scripps. This is at least true for these data from the 20th century. "F...

Stealth Worms May Improve Insect Pest Control

...todes are accurately identified and analyzed using traditional morphology (structure and function) techniques and through molecular screening, including PCR (polymerase chain reaction) and DNA sequence analysis. The researchers determine the nematode's temperature and moisture requirements, the insect hosts it ...

WHO suspends Marburg work, appeals for new funds

...cal belief systems about the causes of disease and traditional rituals for mourning the dead must be respected. When the public understands and accepts a few simple messages ?avoid contact with blood and other fluids when caring for the ill, don’t touch bodies of the deceased ?transmission within the community c...

Where bacteria get their genes

...y puzzle. Many scientists have argued that drawing traditional family trees does not make sense for bacteria, bec... lateral gene transfer does not interfere with the traditional approach of using family trees to infer relationships. Ochman's team found that only 205 genes of Ga...

Primates on the brink

... -they are most often hunted and traded for use in traditional medicines. Most of this trade appears to be international, primarily to China." As "Flagship Species" and our closest living relatives, nonhuman primates are important to the health of their surrounding ecosystems. Through the dispersal of seeds and...

Penn Researchers Use Robotic Surgery

...s the direct, "intuitive" control they exercise in traditional open surgical procedures, seamlessly translating their natural hand, wrist and finger movements at the console into corresponding micro-movements of laparoscopic surgical instruments inside the patient's body. Additionally, the robot is computer con...

Two new retroviruses—transmitted from animals—identified

...s the direct, "intuitive" control they exercise in traditional open surgical procedures, seamlessly translating their natural hand, wrist and finger movements at the console into corresponding micro-movements of laparoscopic surgical instruments inside the patient's body. Additionally, the robot is computer con...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

...cer that's equivalent to 20 years of work with the traditional method, and then we can study the identifiable mutations," Kao said. Whether she's studying existing mutants or creating her own, Kao's main interest lies in learning how to manipulate cells to do what she wants. The family of soil bacteria she focu...

A probe, not an echo

...ode, to create the 3-D image. He explains that in traditional hand-held ultrasound systems, sound waves are broadcast into the tissue, and the echoes produce an image of the reflecting interfaces ?that is, the sound transmitter and the receiver are both on the same side of the sample. However, only a tiny frac...

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