Tag: "characteristics" at biology news

Researchers identify 170 genes involved in Crohn's disease and ulcerative colitis

...owel disease." The two diseases share many similar characteristics and thus are sometimes hard to differentiate, but they clearly have very different genetic profiles. Applying DNA microarray technology, the most powerful method forgene expression profiling, Chakravarti analyzed colon tissue from six individuals w...

UCSF studies illuminate possible new landscape for targeting cancer

...that develop, in terms of aggressiveness, and such characteristics as what factor is promoting angiogenesis. And this is occurring in tumors containing very powerful oncogenes." As the primary source of the MMP-9 protein appears to be inflammatory cells in both models, the discoveries could explain why other stu...

With its key role in plant maturation, a newfound gene could yield a novel class of genetically modified crops

...t in squint indicates that CyP40 affects secondary characteristics of adult plants, like the shape and biochemical properties of leaves, but not sexual maturation or flowering. The very first leaves that appear on a squint mutant are toothed and angular, like mature leaves, rather than stubby and rounded like juven...

Geologists explore beach nourishment controversies, groundwater quality, and Blue Ridge mountain issues

...n involves understanding the physical and chemical characteristics of the underlying aquifers. This talk is focused on area sources of groundwater and important factors in sizing them. Near-Surface Aquifer Development, Nitrogen Saturation, and Theis Capture: Lessons from Lizzie H. E. Mew, Jr., Division of Water Qua...

Major fossil find reveals Asian origins of salamanders

...is find, combined with molecular data and study of characteristics from living salamanders, leads to the inescapable ...old question. Neoteny, the retention of juvenile characteristics in the adult animal, is extremely important to the generation of diversity among salamanders. More t...

In possible boon to sickle cell victims, basic scientists find reason cells stick

... conditions inside blood vessels, as well as other characteristics such as temperature and pressure. An antibody against human IAP succeeded in keeping the affected red blood cells from sticking to thrombospondin in the blood flow system, she said. From that they concluded that IAP may cause part of the impaired bl...

With an eye on safety, UF experts explore cellular mechanisms of gene therapy

...nto the DNA of the cell and in doing so change the characteristics of the cell from being a normal cell to a cancer cell. One way this might occur would be if the new DNA was able to effectively switch on a previously silent tumor-causing gene." In studies in people and animals conducted during the past decade, UF s...

Do the effects of prenatal exposure to alcohol differ by culture?

...ts on prenatal alcohol exposure." One of the characteristics of children with prenatal alcohol exposure is hyperactivity. Kodi and his colleagues were surprised to find that children with FAS in South Africa were not hyperactive, despite having difficulties in attention and concentration. The group hypothe...

Immune system helps prevent tumors after all

... certain types of tumor cells and also changes the characteristics of others. "Immunoediting could explain why the immune system can select for tumors that are more capable of escaping the immune system as they continue to develop," says Schreiber. "If this process is always occurring, it can have multiple outcomes...

First dinosaur found with its body covering intact; displays primitive feathers from head to toe

.... But they do know that it shares some anatomical characteristics with two other dromaeosaurs discovered in the same fossil beds: Sinornithosaurus, a small theropod dinosaur first described in 1999, and Microraptor, the smallest known theropod dinosaur, found last year. A Treasure Trove of Fossils in China Cons...

In gene therapy first, scientists restore vision to dogs born blind

...s and other dogs that have been inbred to preserve characteristics of their breed. "The retina initially looks normal," Hauswirth said. "Over time, however, the retina starts losing part of its structure because there is no visual input. By the time a child is 10 or 15 years old, the light-sensitive photoreceptor ...

Pooling worldwide data about childhood tumors helps researchers gauge aggressiveness of treatment

...entional clinical staging to incorporate molecular characteristics of the cancers, yielding more accurate risk groupings and guiding better treatments." Pushing Tumors Toward SuicideDr. Brodeurs team also continues to explore the molecular mechanisms of neuroblastoma. While important, the MYCN oncogene is not the wh...

Nuts cut coronary heart disease risk

... in coronary heart disease risk among people whose characteristics match those of the general adult U.S. population. Among the nuts consumed by the people who took part in the epidemiologic studies were almonds, brazil nuts, cashews, hazelnuts, macademia nuts, pecans, pistachios, and walnuts, as well as peanuts. H...

'Silent' DNA speaks up for the first time

... transcription, the process by which genes dictate characteristics such as hair and eye color. "Until now, genes sheathed in heterochromatin were assumed incapable of being expressed due to an absence of trigger proteins," Gross said. "This research shows that these proteins do naturally penetrate the heteroch...

Abnormalities in stress hormone response among alcoholics

...luence of cigarette smoking or certain personality characteristics on stress response. Approximately 85% of alcoholics (recovering or actively drinking) are current cigarette smokers. Smoking is known to affect serotonin function, and both smoking and nicotine withdrawal have been associated with changes in LHPA a...

Male and female songbirds show big learning differences

...opying birds of either sex, but added sex-specific characteristics to them. Young birds memorize songs during a time window called the sensitive period, and later practice their songs compared to the memory. Yamaguchi found that while the sensitive period started at around the same age for both sexes, it lasted mor...

Remote sensing study defines "edgy" cities

...adh and Madrid for example, where there seem to be characteristics of both." Though the distinctions here may seem obvious, Stefanov points out that until now cities have only been described by general characterizations, rather than by specific data. The ASTER data provides a specific benchmark for modeling cities ...

Gene chips accurately diagnose four complex childhood cancers

...have to be turned on, or expressed, for the unique characteristics to appear. By identifying the pattern of gene expression for muscle cells, skin cells or any type of cells, including cancers, scientists can create a genetic fingerprint of that cell type. Genetic fingerprints can uniquely differentiate one cell typ...

ESA recommends cautious approach to releasing GMOs into the environment

...recognize that some GMOs can possess genuinely new characteristics that may require much greater scrutiny in terms of scientific research than organisms produced by traditional techniques of plant and animal breeding. In particular, we really need more peer-reviewed research on the potential environmental effects of...

Study of marine snail suggests conservation efforts should consider factors beyond genetic diversity

...ay not always spot populations with novel adaptive characteristics worthpreserving. ...

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