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Tag: "examination" at biology news

Imaging Lymph Nodes with Nanoparticles

...rrentmethods include surgical removal of nodes for examination and varioustypes of imaging, ranging from ultrasound to newer technologies such asmagnetic resonance imaging (MRI). All these methods have problems; someare very invasive, others are very time consuming, and none arecompletely reliable.However in one...

Alcohol's effects on gene expression in the central nervous system

... of alcoholics," he said. "Microarray studies ?the examination of a small glass microscope slide that has thousands of different DNA samples attached to it ?that are applied to brain function are just beginning in the field of alcoholism. Several years ago, it was impossible to analyze more than a handful of the...

Breast-Cancer Risk Linked to Exposure to Traffic Emissions at Menarche, First Birth

...gent in risk of breast cancer," said Nie. "Further examination of PAH exposure in early life is clearly warranted." The UB researchers currently are examining whether genetic polymorphisms involving PAH metabolism may modify the risk, if lifeline cumulative exposure may be associated with the risk and if this s...

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...les studied by the rover to bring back for further examination in the lab. On a typical day in the field, the rover woke up and followed a path designated the previous day by the remote operations science team. The rover followed a transect and stopped occasionally to perform detailed surface inspection, effecti...

Researchers rein in regulatory RNAs

...d tissue-specific expression patterns. Upon close examination of several SAT pairs, Abe's group found that the transcripts shared several striking characteristics. Northern blot hybridization analyses of six randomly chosen SAT pairs revealed that the SAT loci generated multiple transcripts of various sizes, in...

Small species back-up giant marsupial climate change extinction claim

...eoenvironment record was well established. Closer examination revealed a bias in sample collection in favour of larger animals and there had been few attempts to document ecological and sediment data. "Our samples show that species dependent on habitats such as woodlands and vine thickets dominate the lowest s...

Test for early detection of prostate cancer shows promise

...wo-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 cases erroneously highlights noncancerous conditions. “This ne...

Physiological effects of reduced gravity on bacteria

... water systems, including those of space stations, examination of responses to conditions like microgravity may offer significant insight into the factors that influence bacterial distribution. In this study, water system bacterial isolates from the ISS were compared to other isolates from corresponding type str...

Insight into DNA's 'weakest links' may yield clues to cancer biology

...ements, the researchers reported. Through further examination of breakpoints in a small region of one chromosome, the researchers found that the fragile sites occurred at locations along the DNA containing "retrotransposons" called Ty elements. Retrotransposons are mobile gene segments that duplicate themselves...

Bobbing birds do it for a reason

...racteristic of birds, permits the close and stable examination of objects in view during the immobile phase and allows the birds to change their point of gaze and probably to gather a sense of space and of the relative positions of objects when the head is thrust forward. ...

Scientists analyze chromosomes 2 and 4

...in-coding genes on chromosome 4. As part of their examination of chromosome 4, the researchers found what are believed to be the largest "gene deserts" yet discovered in the human genome sequence. These regions of the genome are called gene deserts because they are devoid of any protein-coding genes. However, r...

U. Iowa researchers improve Huntington's disease symptoms in mice

...mproved in comparison to untreated mice. Detailed examination of the protein levels in the treated mice showed that levels of the toxic HD protein were reduced to about 40 percent of the level seen in untreated mice. "It is very exciting that a partial reduction is sufficient to produce a very beneficial effec...

Chronic Sinus Infection Thought To Be Tissue Issue, Mayo Clinic Scientists Show It's Snot

...tion patients. Through various forms of laboratory examination of the tissue and attached mucus, the investigators observed an abundance of major basic protein throughout the nasal and sinus mucus in all 22 specimens, but not in the tissue. Chronic sinus infection is one of the most common chronic diseases in t...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

... represents the first large-scale proteomics-level examination of a natural microbial community. "As such, we are really among the leaders in this area, as evidenced by the strong interest in Science," Hettich said. "This is an area in which there is keen interest by many research groups; however, our team has ...

Major advance made on DNA structure

.... In their studies, the OSU scientists used X-ray examination of crystalline DNA to reconstruct exactly what the DNA looks like at the atomic level. By determining 63 of the 64 possible DNA sequences, they were able to ultimately determine the physical structure of the underlying DNA for all different types of ...

Investigating 'brain shrinkage' in alcoholics

...ng and animal research allows for an unprecedented examination of underlying mechanisms of damage. "Alcohol dependence follows a longitudinal course," explained Harper, "from initiation to development of dependence, maintenance, withdrawal, and more often than not, a return to drinking. Throughout this course, ...

Discovering an ecosystem beneath a collapsed Antarctic ice shelf

...ined from any subsequent studies could enhance the examination of subterranean water on Earth or the hypothesized ocean beneath the surface on the Jovian moon Europa. ...

Weight control protein may yield antiobesity drugs

...rimary risk factor for obesity, he added. Further examination found that the animals lacking SH2-B ate nearly twice as much as normal. Surprisingly, Rui said, the animals burned more calories; however, the animals still have a net positive energy imbalance of more than 60% higher than normal animals at 18?9 wee...

Tadpole soon to help in the fight against cancer and lymphedema

...omplex. Moreover, a study of mice only enables the examination of gene per gene, which complicates revealing the combined action between various genetic factors. For efficient research smaller model organisms are used, such as the zebrafish, which is popular in the study of the blood vessel system. But the zebra...

Locusts' built-in 'surface analysis' ability directs them to fly overland

...rth over southern Israel. This observation led to examination by scientists of the Hebrew University of Jerusalem Department of Evolution, Systematics and Ecology and the Interuniversity Institute for Marine Sciences in Eilat to examine how the locusts were able to identify the gulf water and knew not to fly ov...

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