Sentences with phrase «photolysis of»

Not so much by direct photolysis of water vapor (not generally a lot of that in the stratosphere), but from CH4, which could build up in a nearly oxygen - free atmosphere, and being largerly of biotic origin, with the H coming from photosynthesis (releasing O); O2 buildup itself was delayed because of geologic O2 sinks (in particular, the conversion of ferrous Fe (naturally present in the crust and mantle and which can dissolve in the oceans) to ferric Fe (precipitates out of the water, the source of banded - iron formations, which humans have used to get Fe).

Photolysis of DM - nitrophen increased [Ca2 +] i from resting concentrations of 20 - 50 nM to values above microM, as measured with the fluorescent indicator Fluo - 3.

Synergy Between Cell - Penetrating Peptides and Singlet Oxygen Generators Leads to Efficient Photolysis of Membranes.

Not exact matches

Steven Reiken, a research fellow in the department of surgery at the Massachusetts General Hospital in Boston, believes that antibody - targeted photolysis (ATPL), a technique based on a procedure used to treat some cancerous tumours, could cure infections caused by P. aeruginosa.

Quentin H. Gibson, who is best known for his pioneering work on the kinetics of ligand binding to hemoglobins and the development of stopped flow and flash photolysis instruments, passed away on March 16, 2011 in Hanover, N.H., at the age of 92.

So far we have only been able to detect the presence of some of the simpler amino acids in our photolysis residues.

This water photolysis must have happened to the primordial Earth, with loss of Hydrogen to space but it was stopped, as it is today, by the presence of ozone (O3) which requires high oxygen tension to form and it quickly reoxidises hydrogen via OH hydroxyls back to water.

The extent of the discrepancy became apparent only when he incorporated the new photolysis rate into a chemical model of ozone depletion.

Well, yes Robert if «all of the O3 is destroyed by UV «photolysis» (whatever that may be) every few minutes, leading to the formation of free O atoms, — etcetera», — then it seems reasonable, for me to assume that UV radiation is responsible for the making as well as for the breaking of the «ozone hole»

According to one reference, in the normal atmosphere, all of the O3 is destroyed by UV photolysis every few minutes, leading to the formation of free O atoms, and all of the O atoms are immediately consumed in reactions with O2 to reform O3 in a fraction of a second.

CO2 photolysis in both cases provides a low level of free O2, but in this case there is no overall effect.

Topics that I work on or plan to work in the future include studies of: + missing aerosol species and sources, such as the primary oceanic aerosols and their importance on the remote marine atmosphere, the in - cloud and aerosol water aqueous formation of organic aerosols that can lead to brown carbon formation, the primary terrestrial biological particles, and the organic nitrogen + missing aerosol parameterizations, such as the effect of aerosol mixing on cloud condensation nuclei and aerosol absorption, the semi-volatility of primary organic aerosols, the importance of in - canopy processes on natural terrestrial aerosol and aerosol precursor sources, and the mineral dust iron solubility and bioavailability + the change of aerosol burden and its spatiotemporal distribution, especially with regard to its role and importance on gas - phase chemistry via photolysis rates changes and heterogeneous reactions in the atmosphere, as well as their effect on key gas - phase species like ozone + the physical and optical properties of aerosols, which affect aerosol transport, lifetime, and light scattering and absorption, with the latter being very sensitive to the vertical distribution of absorbing aerosols + aerosol - cloud interactions, which include cloud activation, the aerosol indirect effect and the impact of clouds on aerosol removal + changes on climate and feedbacks related with all these topics In order to understand the climate system as a whole, improve the aerosol representation in the GISS ModelE2 and contribute to future IPCC climate change assessments and CMIP activities, I am also interested in understanding the importance of natural and anthropogenic aerosol changes in the atmosphere on the terrestrial biosphere, the ocean and climate.