Sentences with phrase «chemical markers of»

The presence of oxygen, methane and carbon dioxide, for instance, are widely considered chemical markers of life.

A hunter - gatherer from the 6,000 - year - old German site, identified via chemical markers of diet in the bones, carried around 27 percent ancestry from farmers.

Not exact matches

Ongoing studies at Uppsala University in Sweden have shown that the chemical agent dubbed Pittsburgh Compound - B, or PIB, is a highly accurate marker of plaque buildup and that its abundance in the brain can predict whether patients with mild cognitive impairment will develop Alzheimer's — and when that decline will likely start.

Several researchers, however, are tracking chemical markers in the blood and in the breath with the goal of creating screening tools that could someday not just find cancer but also indicate how dangerous it is likely to be.

Those instructions are found not in the letters of the DNA itself but on it, in an array of chemical markers and switches, known collectively as the epigenome, that lie along the length of the double helix.

The researchers — James Robl, a developmental biologist and his colleagues at the University of Massachusetts at Amherst, and Steve Stice at Advanced Cell Technology in Worcester, Massachusetts — inserted a marker gene fused with a gene for resistance to the chemical neomycin into a culture of connective tissue cells called fibroblasts.

On the outside of the heterochromatin bundles are chemical markers, known as epigenetic tags, which control the structure of the heterochromatin.

By measuring levels of the stress hormone cortisol, plus other chemical markers, the team found that the task caused more cell damage in the women who were already stressed.

University Professor of Applied Physics Stephen Arnold and his team at the New York University Tandon School of Engineering have made a discovery that could lead to Star Trek - like biosensor devices capable of flagging the barest presence in blood of a specific virus or antibody, or protein marker for a specific cancer; or sniffing out airborne chemical warfare agents while they are still far below toxic levels.

If the chemical is not present in her urine, all of the pink nanoparticles will drift up the strip, past the pregnancy - indicator line to a second marker.

Our genome is «programmed» by the addition of chemical markers called methyl groups to the DNA, which shut down genes.

There is also the «sister study» of 51,000 women followed for 10 years looking at nutrition, lifestyle, exposure to environmental chemicals and biological markers.

Exoplanet research has gone beyond the point of finding planets — more than 3000 exoplanets are now known — to looking for chemical markers that might indicate the potential presence of life.

The new technology provides a method to scale up a previously known method for profiling cell types distinguished by the pattern of chemical markers studding their DNA.

«We have a huge set of cannabis genomic data that will, hopefully, allow us to ID genetic markers associated with chemical results and certain patient outcomes,» Holmes says.

Vanapalli and his collaborators, including Wei Li, an assistant professor in the Department of Chemical Engineering, propose a new type of testing, one not based on antibodies and without markers, but holography.

The authors believe theirs is the first study to show that mouse mammary gland tissues are sensitive to a mixture of 23 commonly used UOG chemicals, with dose - specific effects on tissue morphology, cell proliferation and induction of intraductal hyperplasias, an overgrowth of cells considered a marker for future breast cancer risk.

After the pollutants are recorded, the next step is to look for biological signs of chemical exposure, which she calls markers.

This new research shows that the short chain fatty acids increase the number of chemical markers on our genes.

The work, published today (9th January) in Nature Communications, shows that chemical messages from bacteria can change the location of key chemical markers throughout the human genome.

They point out that poor semen quality «is the leading cause of unsuccessful attempts to achieve pregnancy and one of the most common medical problems among young men... it has been suggested as an important marker of male health, predicting both morbidity and mortality... it is sensitive to environmental exposures, including endocrine disrupting chemicals, heat and life - style factors, such as diet... Therefore, it can provide a sensitive marker of the impacts of modern environment on human health.»

«If a person's urine or blood has THS chemicals and biomarkers of liver damage, one can imagine identifying a number of these markers that can be arranged on, say, a strip or a chip which could be used in the physician's office to indicate liver damage allowing for early diagnosis and potential treatment,» Martins - Green said.

For instance, the team uncovered a new type of chemical - sensing tuft cell (which helps alert the immune system to infection or other forms of injury) that displayed markers previously thought to be exclusive to immune cells and which may help sound the alarm about allergens and invading parasites.

Metabolomics is important because quantifying and understanding the full picture of circulating chemicals in the body can help researchers get a clearer picture of that individual's health status, and provide markers and pathways associated with drug action.

The group has found that a broad range of potential physical, chemical and biological markers characterise the Anthropocene, the clearest global markers being radionuclide fallout signals from nuclear testing and changes in carbon chemistry through fossil fuel burning — these in particular show marked changes starting in the early to mid-1950s.

As the studied chemical reactions occur very rapidly — in less than a second — and the ALS technique can take about 20 minutes to scan a single spot on a particle, the researchers used a layer of chemically active molecules, which were attached to the surface of the particle, as markers for the catalytic reactivity.

The Imager has a spectrograph that separates light out into its constituent colors, and these so - called spectra bear markers of the chemical elements in a planet's atmosphere.

Instead, researchers measure a variety of inflammatory chemical markers in the blood or tissue, notably interleukin - 6, tumor necrosis factor (TNF), C - reactive protein, prostaglandins, and leukotrienes.

Inflammatory markers (released during times of inflammation) directly interact with other hormones and chemicals in the body to not only slow the metabolism, but program the body to store more fat.

When the offending food, called an allergen enters the blood stream and meets its IgE marker, it triggers the release of chemicals including histamine that cause the classic symptoms of allergy - skin rashes, hayfever, rhinitis, sinusitis, asthma, eczema, swelling in the face or throat and anaphylaxis.

The number - this represents three chemical markers that indicate the content of this honey to ensure purity and quality.

The absence of dog scent aside, these rooms further reduce feline stress because they may be equipped with diffusers that disseminate a synthetic version of the normal pheromones given off by cats as they rub their cheeks against people or furniture; this pheromone serves as a chemical marker that signifies safety, contentment, and familiarity.

Groups that believe that periodontal disease is the root of general health issues point out that marker chemicals of generalized inflammation (C - ractive proteins) are present in the blood of humans and animals with periodontal disease even before heart or kidney problems occur.

In Boulder and Toronto, we found that D5 was present in urban air at mass concentrations comparable to those of benzene, a chemical that is a marker for vehicle exhaust.