Sentences with phrase «by the chemical composition»

MDX can solve this problem as it uses two energy spectrums and a dual - layer detector to filter materials by their chemical composition, leaving a clear high - definition image that shows density difference based on chemical composition.

Dual Energy x-ray systems bring value added detection features to identify missing product, damaged product, dented or altered packaging and presence of a premium item by discriminating materials by their chemical composition (atomic number).

These composites derive their functionality by their internal structure rather than by their chemical composition.

The astronomers divided the stars by their chemical compositions and then compared the motions of each group.

«We were very surprised by the chemical composition,» he says.

How a material affects light falling upon it is dictated in part by its chemical composition, but its internal structure can have an even stronger influence.

During this stage, the star is located along the main sequence at a position determined primarily by its mass, but also by its chemical composition and other factors.

I enjoyed so much to start thinking in the capability of small things to make a notable difference in biological systems, such as how the properties of the cell membranes are influenced by its chemical composition, and how the food chain is mainly supported by the photosynthesis reaction of plants and algae, which ultimately lead us to survive.

Individual players are usually unaffected by the chemical composition of other stakeholders.

First, two premises (to confirm that I got them right)-- Changes in pH usually has been buffered (counteracted) by the chemical composition in the ocean.

I am not sure what you mean by chemical composition of the sea water John.

These pipes typically exhibit signs of failure at or around the 40 - year mark, and failure can be accelerated by the chemical composition of the water supply.

Not exact matches

Nor is it particularly important to know the chemical composition of a man, except for the purposes of amusing or shocking audiences in popular lectures by telling them that they are so much hydrogen, oxygen, carbon, nitrogen, potassium, sulfur, and so on, worth one dollar and ninety - eight cents on the current market in chemicals.

The most comprehensive methodology for testing the chemical composition of unrecorded alcohol products was developed as part of the Alcohol Measures for Public Health Research Alliance (AMPHORA) project, a collaboration among 13 EU member states funded by the European Commission.

Summary: To be considered bioactive, honey should be analysed for its chemical composition by a suitably certified laboratory (e.g. NATA — National Association of Testing Authorities).

Highly acidic foods, such as sauces like BBQ and ketchup, have a higher risk of changes to their chemical composition due to their low pH. Both acid hydrolysis (decomposition) and the reaction of additives and substitutions are accelerated and dictated by the temperatures that the ingredients are exposed to.

The heating process influences the taste of the beverage by changing the coffee bean both physical and chemical composition.

The team analysed the chemical composition of tiny shells built by organisms (foraminifera) that had lived in the water column and at the sea bottom before their shells became embedded in the seafloor sediments.

HERA will not be able to directly analyze the chemical composition of those early objects (such work is done with a technique called spectroscopy), but Hewitt said it will be possible to learn something about the characteristics of those early objects by studying their interaction with the hydrogen that surrounded them.

Haggerty and his colleagues analyzed the chemical composition of the diamonds by bouncing infrared light off polished slivers.

The team were able to draw these conclusions by analysing new data from the chemical composition of the fossilised shells of sea surface and seafloor organisms from that period, taken from drilling cores from the ocean floor in the South Atlantic.

Scientists can manipulate the properties of artificial diamonds by altering their chemical composition.

«We found that these clusters can perform very well as room - temperature nanoscale diodes whose electrical response we can tailor by changing their chemical composition,» says Venkataraman.

The special treatment alters the chemical composition of the complex sandwich structure — thereby altering its electronic properties, as confirmed by various methods including detailed electron microscope investigations.

They succeeded in reconstructing the atomic lattice of the samples layer by layer and determining the composition of all phases, so that they could explain the chemical evolution of the γ particles.

The diffuse gas clouds backlit by J1717 - 337 and NRAO530 show chemical composition similar to the gas in active star forming regions, indicating that the diffuse gas is bathed in strong ultraviolet light.

The images chronicle the evolution of the particles» chemical composition and reaction rates at a nanoscale spatial resolution and a minute - by - minute time resolution.

The chemical composition is also affected by how long the river stays frozen each winter.

«Every star in that cluster will have the same chemical composition, or DNA — these clusters are quickly pulled apart by our Milky Way Galaxy and are now scattered across the sky,» Dr Martell said.

The spectrometer analyzed the chemical composition of the water samples and the researchers compared the resulting data with a large list of 1,100 «suspect chemicals» by employing a nimble data - mining algorithm.

Both events were accompanied by warming episodes the U-M-led team found by analyzing the chemical composition of fossil shells using a recently developed technique called the carbonate clumped isotope paleothermometer.

But moon rocks — some of them analyzed with ever more powerful spectroscopy to reveal chemical composition here on Earth and some by robotic craft on the lunar surface itself — are still full of surprises.

A Cologne working group involving Prof. Carsten Münker and Dr. Elis Hoffmann and their student Sebastian Viehmann (working with Prof. Michael Bau from the Jacobs University Bremen) have managed for the first time to determine the isotope composition of the rare trace elements Hafnium and Neodymium in 2.7 - billion - year - old seawater by using high purity chemical sediments from Temagami Banded Iron Formation (Canada) as an archive.

The research team, led by Will Clarkson of the University of Michigan - Dearborn, found that the motions of bulge stars are different, depending on a star's chemical composition.

The team studied the binary system and the chemical composition of the debris by measuring the absorption of different wavelengths of light or «spectra», using the Gemini Observatory South telescope and the European Southern Observatory Very Large Telescope, both located in Chile.

In particular, sensors that could analyze the chemical composition of the plumes, either remotely or by sampling the material as it whizzed through the vapor, could provide keen insights into the chemical processes taking place on or deep beneath Europa's icy surface.

To answer that question, Collins and his team compared the chemical composition of the collagen in the fragments with the collagen produced by modern and archaic humans.

The universe's earliest stars comprised unique chemical compositions, but they have burnt themselves out by now, he explains, so scientists will have to look for remnants from these stars in today's suns.

Overall, the chemical composition of NWA 7034 is strikingly similar to rocks recently analyzed by Mars rovers, and it closely matches the average composition of the Red Planet's crust as estimated by orbiting probes.

The researchers were puzzled by a nonlinear drop in surface water diffusivity — as measured by the Overhauser dynamic nuclear polarization apparatus in the Han lab — as the chemical composition of the silica surface moved from hydrophobic to hydrophilic.

The scientists found that when raised under warming conditions, bryozoans altered their chemical composition by building higher levels of magnesium into their skeletons, particularly if they were also eating less food.

By analyzing the chemical composition of the water in which the animals lived during the duration of the experiment, the researchers determined that exposure to space induces distinct differences in metabolism and / or secretion.

At present, the ocean takes up a quarter of the CO2 - released to the atmosphere by human industrial activities — with long - lasting consequences for the chemical composition of seawater and marine habitats.

In addition to quantitative mineralogy, Rietveld refinements also provide unit - cell parameters for the major phases, which can be used to infer the chemical compositions of individual minerals and, by difference, the composition of the amorphous component.

An X-ray spectrometer onboard the spacecraft measured the X-ray radiation from the planet's surface, produced by solar flares on the sun, to determine the chemical composition of more than 5,800 lava deposits on Mercury's surface.

The new study, led by the expert Andrea Hevia, researcher at CETEMAS - Asturias, analysed temporary changes in the chemical composition of annual growth tree rings in the Pyrenees, in particular those in subalpine black pine (Pinus uncinata) forests in the national parks in Ordesa and Monte Perdido, and Aigüestortes and Estany de Sant Maurici.

These studies revealed that the new template's ability to mediate the attachment of a new functional group to a distant carbon atom can be «tuned» by making slight changes to its chemical composition, including the choice of the proper metal catalyst at its working end.

The shape and chemical composition of the mounds, called stromatolites, match those formed by modern bacterial communities living in shallow seawater, says a team led by geologist Allen Nutman of the University of

To help address this challenge, a team of U.S. Department of Energy researchers conducted laboratory experiments in an environmental chamber to investigate the effects of NOx on the volatility and chemical composition of SOA generated by isoprene photooxidation.

The chemical composition of promising compounds can then be identified, the researchers say, by taking the relevant bead and exposing it to a strong oxidising agent.