Sentences with phrase «of dichloromethane»

Columbia Engineering's compact, chip - scale dual comb spectrometer was able to measure a broad spectrum of dichloromethane in just 20 microseconds (there are 1,000,000 microseconds in one second), a task that would have taken at least several seconds with conventional spectrometers.

Although the future trajectory of dichloromethane is uncertain, without any regulations on emissions, it is likely concentrations will fall somewhere in between the ranges presented here.

On the broader implications of the findings and outlook, Dr Hossaini said: «Ozone is an important climate gas and changes to its abundance, including due to the increasing influence of dichloromethane, could be relevant for refining future climate predictions.

Measurements of dichloromethane in the atmosphere over the past two decades, provided by scientists from the National Oceanic and Atmospheric Administration (NOAA) in the United States, were also analysed.

Not exact matches

«While ozone depletion from dichloromethane is currently quite modest, it is uncertain how the amount of this gas in the atmosphere will change in the future.

Dr Ryan Hossaini of Lancaster University and colleagues use simulations with a global chemical transport model to examine the sensitivity of future stratospheric chlorine and ozone levels to sustained dichloromethane growth.

At present, the long - term recovery of the Ozone Layer from the effects of CFCs is still on track, but the presence of increasing dichloromethane will add some uncertainty to our future predictions of ozone and climate.»

Study lead author Dr Ryan Hossaini, from the Lancaster Environment Centre at Lancaster University, said: «Dichloromethane is a human - made ozone - depleting chemical that has a range of industrial applications.

At present, the long - term recovery of the Ozone Layer from the effects of CFCs is still on track, but the presence of increasing dichloromethane will lead to uncertainty in our future predictions of ozone and climate.»

The amount of this substance in the atmosphere decreased in the 1990s and early 2000s, but over the past decade dichloromethane became approximately 60 % more abundant.

The maze runners, placed at the entrance of the labyrinths, were millimeter - wide droplets of either mineral oil or the organic solvent dichloromethane, both loaded with a weak acid and red dye.

Using this dual comb, Lipson's and Gaeta's groups demonstrated real - time spectroscopy of the chemical dichloromethane at very high speeds, over a broad frequency range.

Dichloromethane breaks down in the atmosphere in about four months and its harmful degradation products are completely removed from the atmosphere within a few years of their emissions.

«Because of its very short - lived nature, and the unlikely scenario of the emissions sustaining a high growth rate, it's highly unlikely dichloromethane would have a major impact on the ozone layer,» said Liang.

One of these substances called dichloromethane has come under recent scrutiny because of its increasing emission rates over the last few years.

While its production, use and destruction are accurately monitored and reported, it also forms as a by - product in the production lines of chloroform and dichloromethane.

These new ozone - busters include dichloromethane (DCM), a common and cheap paint stripper, also used in foam - blowing agents and, ironically, in the manufacture of «ozone - friendly» alternatives to CFCs.

Extraction of 5 — 10 g of freeze - dried sediments was carried out using an accelerated solvent extractor (DIONEX, ASE200; 100 °C, 5 min, 1000 psi) with dichloromethane: methanol (2:1, v / v) as a solvent.