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Tag: "measurement" at biology news

Scientists ID molecular 'switch' in liver that triggers harmful effects of saturated and trans fats

...at was isolated in 2002. Experiments including the measurement of gene activity by microarrays showed that saturated and trans fats caused greater activity of the gene that makes PGC-1beta co-activator than did unsaturated fats. The research also showed that when the fats triggered PGC-1beta, the co-activator i...

Recent breakthroughs in common adult leukemia highlighted in New England Journal of Medicine

...for clinical use, however according to the review, measurement of one protein marker called ZAP-70 is becoming more widely available. The authors note that ZAP-70 may actually be the most reliable indicator of prognosis known to date. After discussing B lymphocytes -- the type of white blood cell that gives ris...

Devising Nano Vision for an Optical Microscope

...0-year-long record as an indispensable imaging and measurement tool well into the expanding realm of nanotechnology. Called phase-sensitive, scatter-field optical imaging, the computer-intensive technique under development at NIST uses a set of dynamically engineered light waves optimized for particular propert...

Affymetrix and the Karolinska Institutet Announce Translational Medicine Strategic Alliance

...ve years the projects include genetic analyses and measurement of gene expression in patients with atherosclerosis, breast cancer, rheumatoid arthritis, asthma and dyslexia. These diseases affect a large number of patients worldwide. Systematic use of the genomic information obtained will enable development of n...

Implanted Devices Detect High-Risk Heart Failure Patients

...ardiologists a new view of subtle changes in a key measurement of heart health -- heart rate variability. Patients with little variability -- whose hearts are unable to appropriately react to external stimuli by regulating their beating action -- are known to be at higher risk of suffering a heart attack. The ne...

Signs of aging: Scientists evaluate genes associated with longevity

...nce tags and provides an unbiased and quantitative measurement of gene-expression differences. This study was the first to utilize SAGE to analyze aging-related gene-expression changes. It is expected that the large volume of SAGE data generated for this study will also be utilized to more fully annotate the C. ...

Finding hidden invaders in a Hawaiian rain forest

By applying novel measurement techniques from a high-altitude aircraft, scientists detected two species of invading plants that are changing the ecology of rain forest near the Kilauea Volcano in the Hawaii Volcanoes National Park. Lead author, Dr. Gregory Asner of the Carnegie I...

Bobbing birds do it for a reason

...itude head movements during locomotion, making the measurement of the speed of the head relatively easy via non-invasive computer-video techniques. The cranes search both for mobile prey (frogs and insects) and for items such as acorns, seeds, and tubers. The research team found that the time devoted to holding ...

Analysis Of Human Genome To Predict The Development Of Illnesses

...ta. Using the appropriate analyses, it enables the measurement of the efficiency of and patient response to the different treatments administered, thus enabling the identification of new, more effective therapeutic targets. This new tool is available on Internet, thus enabling any biochemist working in genomics...

Researchers Find New Technique To Identify Fetal Genetic Material From Amniotic Fluid

...omb is now "limited to noninvasive methods such as measurement of uterine size or anatomic evaluation by fetal sonography. In addition, genetic analysis can be performed on amniotic fluid components ? They add that the "cell-free component of the amniotic fluid is discarded after these analyses and is therefore ...

Best research work in the area of wine growing

...t in each plant was assessed by means of the daily measurement of the hydric potential before dawn and, when a plant reached the stress interval, it was irrigated immediately. After two or four days after the recovery irrigation, the gaseous interchange was measured, comparing it with plants that had not suffere...

Using computers and DNA to count bacteria

...lex, so diverse and densely populated, that normal measurement methods are overwhelmed. "With improved analytical methods, we show that the abundance distribution and total diversity of soil-borne bacteria can be deciphered," said Dunbar. "More than a million distinct genomes were present in the pristine so...

Comparison of Cocaine, Methamphetamine ‘Highs?Finds Differences

...lex, so diverse and densely populated, that normal measurement methods are overwhelmed. "With improved analytical methods, we show that the abundance distribution and total diversity of soil-borne bacteria can be deciphered," said Dunbar. "More than a million distinct genomes were present in the pristine so...

New mitochondrial DNA gene chip may be early cancer diagnosis tool

...tection Research Network (EDRN), has validated the measurement accuracy of new techniques that use mitochondrial DNA as an early indicator for certain types of cancer. Additional results suggest that a relatively simple diagnostic test using a DNA microarray "chip" could enable early detection of some solid tumo...

Chemical 'band-aid' prevents heart failure in mice with muscular dystrophy

...udy. He created a device to allow the simultaneous measurement of force and intracellular calcium concentration in individual myocytes as they are stretched. Yasuda's device uses microcarbon fibers stuck by electrostatic attraction to each end of a single cardiac myocyte. As the myocyte is stretched between the ...

'Underground' tunnels discovered as means for communication between immune system cells

... The use of a fluorescent dye, which allows direct measurement of calcium levels, would determine if calcium flux occurs before dendritic cells unfurl their veils. With a microinjection tip, they squirted a mixture of E. coli fragments into a culture dish, and, indeed, one to two minutes before the appearance o...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

... the value and benefit of using dynamic sensor web measurement techniques and adaptive observing strategies, NASA...driven sensor web could be used to enhance current measurement techniques, and bring to bear multiple complementary instruments to respond to rapidly changing envi...

Errors in the measurement of global warming corrected

...gn, according to this study. With exposed sensors, measurement taken in daylight read too warm, and while solar heating had a measurable impact on the earlier designs, the effect became negligible in more recent designs. "It's like being outside on a hot day -- it feels hotter when you are standing in the direc...

New law for resolution allows unprecedented sharpness in fluorescence microscopy

...esearch team from Göttingen shows that using STED, measurement volumes notably below the resolution limit can be produced without confining the solution itself mechanically. This method may substantially improve the analysis of pharmaceutical active ingredients and protein interactions in cells in future. Origi...

New technology shows our ancestors ate…everything!

...ooth surface caused by use, offers a more accurate measurement of the surface's appearance and is described in the August 4 issue of Nature. "Paleontologists and physical anthropologists have had a somewhat naive view on diet, in part due to the limitations of time-consuming, subjective approaches to analyzing ...

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