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Tag: "location" at biology news

Microcapsules like it hot and salty

...the active substances and then release them at the location where they are to be effective given the presence ...e the contents so that they can be released at the location where they are to take effect. The scientists in Potsdam have now found out that the density and the...

Cougar predation key to ecosystem health

...hown as vividly in Zion National Park as any other location they have ever studied. In Zion Canyon, which since the early 1900s has been a popular tourist attraction, cougars are virtually absent, mostly just scared off by the huge influx of human visitors. With their natural enemy gone, growing and ravenou...

Parasitic plants sniff out hosts

...t, many assumed that the search was random and the location of a host simply a chance encounter. After four days, when the plant was growing flat on the filter paper, the researchers measured the direction of the shoot. The researchers report that 80 percent of the dodder plants grew onto the side of the fi...

Scientist works to improve treatment for brain tumors

...ng physicians to determine the amount and specific location of treatment. "With the help of this research grant, we hope to optimize the clinical delivery of the advanced form of the drug," said Debinski. Debinski directs the Wake Forest Brain Tumor Center of Excellence. The goal of the center, which was fo...

Where we change our mind

...stantly maintain an estimate as to his/her current location as a guide for deciding the next turn," they wrote, "but in the absence of incontrovertible a priori information, this estimate is best represented by the subject's belief. As information is acquired through observation, this belief may become increa...

3-D ultrasound scanner could guide robotic surgeries

...trasound images to pinpoint in real time the exact location of targets in a simulated surgical procedure. That...anner to identify coordinates denoting the precise location of an artificial lesion inside a type of artificial organ, or "phantom," commonly used for testing i...

ABCB6 is key to production of heme in hemoglobin

...uce energy-rich molecules. The discovery of the location and function of ABCB6 solved the long-standing riddle of how porphyrins get into mitchondria so they can be used to make heme, said John Schuetz, PhD, a member of St. Jude Pharmaceutical Sciences. "Porphyrins are negatively charged and so is the insi...

Electric fish in Africa could be example of evolution in action

... involves animals that live in the same geographic location but, for some reason, begin to mate selectively and form distinct groups and, ultimately, separate species. This so-called sympatric speciation is more controversial because there have been few accepted examples of it to date. "Many scientists clai...

NYU algorithm enhances ability to detect cancer genes

...n advanced stage. The NYU algorithm estimates the location of tumor suppressor genes by analyzing segmental d...h one characterizing an almost unique word and its location in the already-sequenced human genome--by combining these probe-measurements, one can estimate if an...

Loosen up, DNA: Leukemia gene changes genetic packaging

...ed or decreased JAK/STAT signaling. They moved the location of the "red-eye reporter gene" around, sometimes inserting it into a "quiet" stretch of DNA, sometimes putting it into an active area, and sometimes inserting it near the border between the two regions. The team used the gene that controls eye color ...

Speeding the search for elusive chromosomal errors

...blinded analysis, the experiment found the correct location of the abnormal regions. In the second part of the study, the researchers studied samples from 10 patients with multiple congenital anomalies, all of whom had previously normal results from karyotype and subtelomeric testing. The team identified nov...

Researcher gives hard thoughts on soft inheritance

...r mechanism for regulation of gene expression. The location of DNA within the nucleus also influences gene expression. "Epigenetics as soft inheritance in mammals puts us on a slippery slope that many people don't want to visit," Richards says. Nutritional epigenomics Still, recent stud...

Coming soon: 3-D imaging that flies 'through' and 'around' cancer

...ard imaging tools that can be used to pinpoint the location of cancer within the body. When PET is used to image cancer, a radiopharmaceutical (such as fluorodeoxyglucose or FDG, which includes both a sugar and a radionuclide) is injected into a patient. Cancer cells metabolize sugar at higher rates than norm...

Bird brains shrink from exposure to contaminants

...these birds in the Okanagan Valley because at that location they are exposed to high levels of DDT, but relatively low levels of other chemicals. The researchers captured 18 nestlings and then hand-reared and observed them for two years. They then sectioned the brains and examined the size of several brain ...

New light microscope sharpens scientists' focus

...ntists peering inside cells to discern the precise location of nearly each individual protein they are studyin...his resolution, it is insufficient to pinpoint the location of individual proteins ?which are typically only one to two nanometers in diameter. The new approach...

Light guides flight of migratory birds

... to the right and left of the sun. Just as the sun location changes with latitude and the time of year, so does the alignment of the band of polarized light. Muheim and Phillips argue that migratory songbirds average the sunrise and sunset intersections of the polarization band with the horizon to find the...

Scientists discover why cornea is transparent and free of blood vessels, allowing vision

...n healthy corneal epithelium, a previously unknown location for the receptor. Dana and his team were already aware from clinical experience that the epithelium most likely played a role in suppressing blood vessel growth on the cornea, having witnessed blood vessels develop on corneas stripped of their epithe...

Scientists discover a genetic code for organizing DNA within the nucleus

... findings appeared today in Nature. The precise location of the nucleosomes along the DNA is known to play an important role in the cell's day to day function, since access to DNA wrapped in a nucleosome is blocked for many proteins, including those responsible for some of life's most basic processes. Amon...

Deep-water discovery

...chemicals depending on the depth, temperature, and location at which they are found. Harbor Branch's quest for drugs form the sea began in the early 1980s and has led to the collection of tens of thousands of marine organism samples and the identification of a number of promising potential drugs now in vario...

Drug discovery team to explore newly discovered deep-sea reefs

...chemicals depending on the depth, temperature, and location at which they are found. Harbor Branch's quest for drugs from the sea began in the early 1980s and has led to the collection of tens of thousands of marine organism samples and the identification of a number of promising potential drugs now in vari...

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