Sentences with phrase «of organic compounds which»

Not exact matches

All of these scientific hypotheses boil down to first there was an planetary mass covered with water and providing the correct conditions for chemical reactions to create a simple organic compound from which life was formed.

Organic matter does this either by «gluing» soil particles together or creating favorable living conditions for soil microorganisms, which in turn can «glue» soil particles together through production of various organic compounds such as glomalin or by the action of fungal hyphae (Sylvia et al., 2005).

That's because it contains a variety of organic sulfur compounds in a volatile oil, which provide certain health benefits.

Inputs into an organic production system are generally prohibited if synthetically compounded — defined by the ACO Standard as a process which chemically changes a material derived from plant, animal or mineral resources, with the exception of microbiological processes.

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.

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 researchers, who released their findings in the current issue of the Journal of Functional Foods, suggest that cruciferous vegetables — such as broccoli, brussels sprouts and cabbage — contain an organic chemical compound called indole glucosinolates, which breaks down into other compounds, including indolocarbazole — ICZ — in the stomach.

Bennu is a carbonaceous asteroid packed with natural organic compounds, which gives it an intriguing connection with the origin of life.

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.

Evidently, earthworms change the forest soils from a fungal to a bacterial - dominated system, which speeds up the conversion of leaf detritus to mineral compounds and thereby potentially robs plants of organic nutrients.

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.

Researchers in China have developed a battery with organic compound electrodes that can function at -70 degrees Celsius — far colder than the temperature at which lithium - ion batteries lose most of their ability to conduct and store energy.

A more detailed analysis of the organic compounds contained in such plumes, which is the goal of proposed future missions, would constitute «the first step toward answering the question of whether life exists inside the subsurface of Enceladus,» McKay says.

Cyanobacteria, which still exist in a similar form today, probably started using energy from sunlight to photosynthesize some of the carbon dioxide in the atmosphere into organic compounds.

The presence of these so - called herbivore - induced volatile organic compounds can make the plant less attractive to pollinators, which can reduce pollen deposition and negatively affect individual plants, an effect known as herbivore - induced pollinator limitation.

As a result, this group succeeded in isolating ORs which respond to three types of volatile organic compounds (2 - pentanone, pyridine, 2 - butanone) respectively in urine samples from lung cancer patients.

Higher temperatures can also increase the emissions of organic compounds from trees, which can then react in the atmosphere to form ozone and particulate matter.

The results show that the supply of fresh organic compounds, which promote the growth of the microorganisms, increases chlorination.

But the data were inconclusive regarding the most intriguing chemicals: complex organic compounds, which are considered a necessary component of life.

Among biogenic volatile organic molecules is a class of compounds called monoterpenes, which react with ozone, hydroxyl radicals, nitrogen oxides, and other gases in the atmosphere.

It's a carbonaceous asteroid, meaning it's made of a mixture of rock, organic compounds and water - rich minerals thought to mirror the make - up of the primordial nebula from which our solar system first condensed.

Like vehicles and power plants, trees emit airborne chemicals called volatile organic compounds (VOCs), which in the presence of sunlight react with nitrogen oxides in vehicle fumes to form ozone, one of the components in smog that makes it a health threat.

Now, using this new technique — which combines optical microscopy with the use of particular organic compounds that make the energy of excitons visible — «we can directly say what kind of behavior the excitons were moving around with.»

For this project, Isaacman - VanWertz studied the smell of pine, which is made of an organic compound known as pinene.

Researchers from UC Davis and the California Institute of Technology conducted a series of experiments in a 24 cubic meter environmental chamber using the volatile organic compound toluene, which is emitted from motor vehicles and is an important SOA precursor.

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.

The researchers tested a variety of solutions containing the soil bacteria Geobacter sulfurreducens and Thiobacillus denitrificans, which thrive by eating acetate (an organic compound that makes vinegar sour) and nitrate (a negatively - charged molecule of biologically available nitrogen and oxygen), respectively, when they can find a spare electron or two.

In this discovery, reported by Caltech researchers in June, radio telescopes picked up faint traces of the organic compound propylene oxide in a vast cloud of gas and dust called Sagittarius B2, which is near the center of our galaxy.

In the new study, led by Purdue biochemist Natalia Dudareva, the team looked for genetic changes as the plant developed from its budding stage, which had the lowest levels of volatile organic compounds, to its flower - opening stage, with the highest levels.

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

An evaluation test with total volatile organic compounds (TVOC), such as acetaldehyde, nicotine and tar, which account for the largest volume of gaseous materials in cigarette smoke, is conducted to evaluate the performance of the newly - developed catalyst.

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

Phosphorescence from organic compounds has typically been observed at extremely low temperatures and in the absence of oxygen, which limits their scope for practical applications.

In August, the EPA issued rules to limit air pollution by volatile organic compounds from «fracking» which should, as a by - product, also reduce emissions of methane.

Scientists analysing samples from Mars» surface have so far not conclusively detected organic compounds that are indigenous to Mars, which would be indicators of past or present life.

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.

Enceladus Life Finder, which would fly through plumes multiple times to collect and characterize the molecules that are there — particularly complex organic compounds that could indicate precursors of life.

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).

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.

That target is an asteroid called Bennu, a type B asteroid, which means it's made primarily of organic compounds and clays.

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.

They usually take the form of chloroplasts, which like cyanobacteria contain chlorophyll and produce organic compounds (such as glucose) through photosynthesis.

Researchers at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and Sandia National Laboratories working at JBEI have resolved the protein structure of the enzyme LigM, which is utilized by the soil bacterium Sphingomonas to metabolize aryl compounds derived from lignin, the stiff, organic material that gives plants their structure.

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

NSG's coatings are largely oxides, such as titanium oxide to catalyse oxidization of organic compounds or doped tin oxide for transparent conductive coatings in which NSG have a leading global position.

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.

Stormwater is effectively a toxic mixture that can include polycyclic aromatic hydrocarbons, many of which are carcinogenic, metals, suspended particles, and other organic compounds, most of which have yet to be identified.

ORGANIC COMPOUNDS Organic compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or COMPOUNDS Organic compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or compounds, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.