Sentences with phrase «formation of organic compounds»

Nucleophilic substitution reactions play an important role in the formation of organic compounds.

This liquid - like ice may enhance the formation of organic compounds including prebiotic molecules and the accretion of dust to form planets.

These experiments suggest that real interstellar ice might behave like a liquid, enhancing the formation of organic compounds, including prebiotic molecules.

Not exact matches

They found that organic compounds, called amino nitriles, the molecular precursors to amino acids, were able to use molecules present in interstellar ice to trigger the formation of the backbone molecule, 2 - deoxy - D - ribose, of DNA.

This includes the role of oxidized volatile organic compounds, such as limonene and alpha - pinene, the typical scents of the citrus fruits and coniferous forests, in aerosol formation.

In research recently published in Environmental Science & Technology, Waring describes the role of limonene, the organic compound that gives cleaners and air fresheners an orange scent and acts as a solvent, in the formation of secondary organic aerosols.

In order to investigate the formation of the extremely low - volatility organic compounds the team has studied five abundant biogenic organic compounds with different chemical structures.

This discovery has important implications for the formation and survival of complex organic compounds — important for the formation of life — in low - metallicity galaxies both young and old.

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.

Concerning causes, we find that the importance of biogenic volatile organic compounds (BVOCs) in NPF and CCN formation is greater than previously thought.

Formation of nitrogen - and sulfur - containing light - absorbing compounds accelerated by evaporation of water from secondary organic aerosols

However, because of its acidity, H2SO4 (and potentially MSA) can enhance the formation and growth of secondary organic aerosol (SOA) from organic compounds (5, 44, 45), including those produced by homogeneous nucleation of low - volatility species (46).

It is also like a bad joke, because carbon just happens to be the most wonderful of all the elements in the periodic table because of its ability to make so many organic compounds that are fundamental to the formation of life.

Gaseous pollutants that contribute to the formation of ABCs are NOx (nitrogen oxides), SOx (sulfur oxides), VOCs (volatile organic compounds), CO (carbon monoxide), CH4 (methane), and O3 (ozone).

The successful candidate will study secondary organic aerosol (SOA) formation from the oxidation of biogenic volatile organic compounds (VOCs).

Later in the article, Unger trots out Ronald Reagan's absurd statements about trees polluting and the importance of volatile organic compounds (VOCs) in the formation of tropospheric ozone and methane.