Sentences with phrase «of organic compounds on»

The next step in the hunt for life on Mars is getting a better grip on the prevalence (or lack thereof) of organic compounds on the surface and in the atmosphere — and then actually digging down into the crust of the Red Planet, to look for actual signs of life, either in the form of fossils or actual living microorganisms.

«The evidence from observation indicates that complex organic chemistry is much more universal than previously thought,» says Fred Goesmann from the Max Planck Institute for Solar System Research, who led the analysis of organic compounds on the Rosetta mission.

Not exact matches

Rembialkowska, Ewa; Hallmann, Ewelina; Rusaczonek, Anna; Bennett, Richard; Brandt, Kirsten; Lueck, Lorna and Leifert, Carlo (2007) The content of bioactive compounds in rat experimental diets based on organic, low - input and conventional plant materials.

Employed on waste water streams, such technologies can achieve up to 99 % COD removal in some types of wastewater (COD, chemical oxygen demand, indicating the amount of organic compounds in water).

PrebioSure is based on several years of research and development of a proprietary enzymatic extraction of biologically active compounds from non-GMO and organic food grade wheat germ, which is also gluten - free, gliadin - free, and fructon - free.

Depending on what the mother has been exposed to in her environment, breast milk can contain concerning levels of organic compounds like PCBs, as well as heavy metals and hormone - disrupters.

We found that the particles seen in our images, which were droplets of ocean only hours earlier, bore evidence of large organic molecules and compounds that indicated hydrothermal activity similar to that observed at deep - sea vents on Earth's seafloor.

The acids form when organic, carbon - containing compounds and water are zapped with a source of energy, such as photons — a process that can take place on Earth or in space.

When analyzing the results, which provided unprecedented measurements of the SVOCs and IVOCs, «we realized we had this data set that provided much more information on organic compounds than we ever had before.

He was an organic chemistry professor at the Federal Institute of Technology in Zurich, Switzerland, from 1942 to 1976, where he carried out research on alkaloids, antibiotics, enzymes, and other organic compounds.

With its sophisticated on - board chemistry lab, Curiosity is hunting for more robust signs of habitability, including organic compounds — the carbon - based building blocks of life as we know it.

On examination, the ozone proved to be largely interacting with one of the primary components of skin oils, the natural organic compound known as squalene, which is used as an adjuvant and moisturizer.

Unlike the electrodes used in lithium - ion batteries, these organic compounds don't rely on intercalation — the process of continuously integrating ions into their molecular matrix, which slows down as the temperature drops.

NASA's Dawn spacecraft has detected organic compounds on Ceres — the first concrete proof of organics on an object in the asteroid belt between Mars and Jupiter.

Other molecules may help explain the origins of the organic compounds that gave rise to life on Earth.

This taste of carbon is intriguing, but it is a far cry from recent feverish speculation that the rover had found definitive evidence for organic compounds on Mars.

Unfortunately, nature is not always willing to easily part with its secrets, forcing scientists to rely on sophisticated imaging technology — nuclear magnetic resonance (NMR) spectroscopy or mass spectrometry, for example — to decipher the molecular formula of newly discovered organic compounds so they can be replicated in the lab.

However, Sagan and Christopher Chyba believe organic compounds, formed at high altitudes by the action of solar ultraviolet radiation on methane and ammonia can provide an ultraviolet «shield» to protect the methane and ammonia in the lower atmosphere.

The Notre Dame researchers, on the other hand, used organic compounds — acetylene and ethylene — to attempt to extend the range of the cells.

«Many reports have been written on the contamination of air and water by volatile organic compounds near natural - gas well sites,» said Verner, who is also a researcher at the Public Health Research Institute.

The craft is designed to dig into the cementlike layer of ice that researchers believe lies buried a few inches below the surface in the planet's polar regions, scanning for signs of past liquid water and organic compounds, the carbon - rich molecules that make life on Earth possible.

They were looking for a site with a venting process that produces a lot of hydrogen because of the potential it holds for the chemical, or abiotic, creation of organic molecules like methane — possible precursors to the prebiotic compounds from which life on Earth emerged.

But it is not clear whether RNA preceded or followed the origin of metabolism, which relies on the chemistry of much simpler organic compounds.

A promising source of hydrogen is the organic compound cellulose, which is a key component of plants and the most abundant biopolymer on Earth.

An international team of scientists has identified and cloned the first gene known to control the production of cellulose — the most abundant organic compound on Earth.

For example, it may be that meteorite impacts of a certain size may not destroy organic compounds or scientists may need to concentrate on rocks excavated from a certain depth.

In the new study, researchers identified six volatile organic compounds (VOCs) on dirty t - shirts and socks, some of which survive washing in a machine at 20 ˚C.

Dirty laundry smells bad because of certain chemicals called volatile organic compounds, which can't always be washed out on an eco-friendly 20 ˚C cycle, according to a new study in the Journal of Chromatography A.

The immediate outcome was to launch six reports, written by international teams of scientists, on major pollutants in the Arctic: acids, metals, noise, oil, organic compounds, and radioactivity.

The assumption of an abiotic origin of organic compounds rested on firm grounds.

«As a result of an exhaustive investigation of the effects of various types of growth substances on plants, we have discovered that certain organic compounds exercise a pronounced stimulating effect on root - growth, and are highly valuable in promoting and inducing root - growth on plant slips or cuttings,» stated Zimmerman and Hitchcock in the patent application.

The near - infrared mapping spectrometer on NASA's Galileo spacecraft found evidence of the presence of molecules made of oxygen, carbon, sulfur, hydrogen, and nitrogen on Europa, and a hint of the presence of a class of complex organic compounds called tholins which may be driven by pre-biotic processes (more).

Situated 150 light - years from Earth, HD 209458b is a planet that holds traces of water vapor in its atmosphere, and also contains basic organic compounds that, on Earth, foster the development of life.

This meant that the configurations of the hundreds of organic compounds that had been determined based on Fischer's arbitrary assignment were also correct.

My research is focused on the origin of the first solar - system solids, ancient presolar circumstellar dust grains, primitive organic compounds, interplanetary dust particles, and the evolution of asteroidal bodies.

Alternatively, some hypothesize that the reservoir of light carbon on the early Earth indicates the presence of simple organic compounds — possibly brought by asteroidal or cometary impactors — that created a hospitable environment for the later emergence of life (more discussion in Rachel Courtland, New Scientist, July 2, 2008; Sid Perkins, Science News, July 2, 2008; and Jonathan Fildes, BBC News, July 2, 2008).

Once they do, scientists will begin analyzing them to learn more about the early solar system — particularly those water molecules and organic compounds, which may help explain the biggest mystery of all, how life on Earth began.

While other species detected in space are formed by gas - phase chemistry alone, or by a combination of both gas and solid - phase generation, methanol is a complex organic compound which is formed solely in the ice phase via surface reactions on dust grains.

«Studies of comets and asteroids show that the solar nebula that spawned our Sun and planets was rich in water and complex organic compounds,» noted Karin Öberg, an astronomer with the Harvard - Smithsonian Center for Astrophysics in Cambridge, Mass., and lead author on a paper published in the journal Nature.

Kristen Meyer, a science major specializing in chemistry, received the award based on her research with fungi and how her undergraduate work will support her long - term commitment to biomedical research and the development of novel organic compounds including antibiotics.

Much of the research has focused on microorganisms capable of immobilizing contaminants, such as uranium, after introducing organic carbon compounds, such as acetate, lactate and ethanol.

The main objective of the Institute conducted fundamental research - to obtain new data on the structure and transformations of organic compounds, their mechanism of chemical reactions, the synthesis of organic compounds, new classes, new opening reactions, the development of new catalysts and to investigate the relationship of their structure to the catalytic activity.

protein One of many large and complex organic chemical compounds on which life depends.

Microbial cycling of isoprene, the most abundantly produced biological volatile organic compound on Earth — Terry J. McGenity — The ISME Journal

Analyses of the sunlight reflected off the asteroid also show that organic compounds are widespread on the surface, he added, including polycyclic aromatic hydrocarbons, CH2 and CH3.

Biologists were surprised to discover that the ecosystems found on the ocean floor along these mid-ocean ridges, consisting of complex organisms like tube worms, clams, and crabs, were dependent for their food on thermophilic chemosynthetic bacteria, which produced organic compounds using the oxidation of inorganic molecules as an energy source, instead of sunlight.

The abundance of water vapor, oxygen, methane, and other organic compounds in the atmosphere could be evidence of an active biosphere on the surface of a planet.

A discovery by a NASA scientist of sugar and several related organic compounds in two carbonaceous meteorites provides the first evidence that another fundamental building block of life on Earth may have come from outer space.

(i) origin and evolution of planetary systems; (ii) origins of organic compounds in space; (iii) rock - water - carbon interactions, organic synthesis on earth, and steps to life; (iv) life and habitability; (v) biosignatures as facilitating life detection.

Certain particle compounds may directly generate ROS in vivo because of their surface chemistry (eg, metals, organic compounds, and semiquinones) or after bioactivation by cytochrome P450 systems (eg, polycyclic aromatic hydrocarbon conversion to quinones).6, 290 a, 290 b A particle surface or anions present on otherwise more inert particles may disrupt iron homeostasis in the lung and thereby also generate ROS via Fenton reactions.291 Other PM constituents may do so indirectly by the upregulation of endogenous cellular sources (eg, nicotinamide adenine dinucleotide phosphate [NADPH]-RRB- oxidase) 292,293 or by perturbing organelle function (eg, mitochondria) by taken - up PM components.261 Particle stimulation of irritant and afferent ANS fibers may also play a role in local and systemic oxidative stress formation.294 Given the rich antioxidant defenses in the lung fluid, secondarily generated oxidization products of endogenous molecules (eg, oxidized phospholipids, proteins) or a reduction in endogenous antioxidants per se may be responsible at least in part for the state of oxidative stress in the lungs (along with instigating the subsequent cellular responses) rather than ROS derived directly from PM and its constituents.