Sentences with phrase «certain organic molecules»

Nitrogen - doped titanium dioxide absorbs visible sunlight and then releases it as electrical energy to destroy certain organic molecules bound to its surface.

Certain organic molecules become activated and react when they absorb sunlight.

It started with a fairly fundamental study of polymers, the long chains that certain organic molecules form.

Not exact matches

Complex organic molecules, consisting of carbon bonded with other elements like oxygen and hydrogen, are common in the Milky Way, but it was uncertain whether they would be produced in certain dwarf galaxies like the neighboring Large Magellanic Cloud.

This allowed them to investigate the phenomena of hydrophilicity and hydrophobicity at the molecular level, i.e. why certain parts of organic molecules attract or repel water.

Researchers had previously theorized that a certain type of spiraling starlight could have locked in the chirality, or handedness, of relatively large organic, carbon - based molecules such as amino acids and sugars in living organisms.

So in addition to warm water, organic molecules, and certain minerals, this moon is also producing an accessible source of energy that could conceivably support alien microbes.

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.