Sentences with word «biogenic»

Formation of biogenic amines and relation to microbial flora and sensory changes in smoked turkey breast fillets stored under various packaging conditions at 4 degrees C. Food Microbiology, Volume 25, Issue 3, May 2008, Pages 509 - 517.

Guenther gained prominence through his systematic advancement of groundbreaking measurements and modeling of biogenic emissions, which led to his development of the Model of Emissions of Gases and Aerosols from Nature, or MEGAN.

In order to investigate the secondary organic aerosol (SOA) response to changes in biogenic volatile organic compounds (VOC) emissions in the future atmosphere and how important will SOA be relative to the major anthropogenic aerosol component (sulfate), the global three - dimensional chemistry / transport model TM3 has been used.

Kirk Smith's reply to Graham Faichney's well - reasoned letter about the place of biogenic methane in the carbon cycle, and hence...

In collaboration with scientists at the National Oceanic and Atmospheric Administration's (NOAA) Geophysical Fluid Dynamics Laboratory and several universities, this position will help develop a new set of chemical mechanism for biogenic VOC oxidation and SOA formation.

The results showed that organic aerosols from biogenic volatile organic compounds will not mix with all oxidized organic aerosols in the atmosphere, as assumed in existing climate models.

Over the studied decade, the computed natural variations (8 %) in the chemical SOA production from biogenic VOC oxidation equal the chemical SOA production from anthropogenic VOC oxidation.

It does contain a modicum of truth, however, in that the largest volume of stromatolitic formations was likely formed by biogenic processes involving photosynthetic cyanobacteria.

The scientists looked at the so - called biogenic fluxes or flow of the three greenhouse gases on land that were caused by human activities over the last three decades and subtracted out emissions that existed «naturally» during pre-industrial times.

Studies on biogenic amine metabolizing enzymes (CBH, COMT, MAO) and pathogenesis of affective illness: III.

Chemists have analyzed potential biogenic compounds in martian meteorites such as ALH - 840001.

Our studies suggest that direct activation of membrane chloride conductances is a general mechanism of action for biogenic amines in the modulation of C. elegans behavior.

Latitudinal variations in benthic processes in the abyssal equatorial Pacific: control by biogenic particle flux.

Based on carbon isotope analyses the methane is of biogenic origin.

CLOUD also finds that ions from galactic cosmic rays strongly enhance the production rate of pure biogenic particles — by a factor 10 - 100 compared with particles without ions.

They are focusing on conditions, in which biogenic SOA precursors from trees and other natural sources meet emissions from industrial or other anthropogenic sources.

At Hyytiälä one day in late December 2013, Nicki Hickmon stepped onto a snow - covered clearing to make a preliminary placement of instrument containers for a field campaign called Biogenic Aerosols — Effects on Clouds and Climate (BAECC).

They collected samples in the frigid waters and used them to create what is believed to be the first spectroscopic, compositional characterization of iron in marine biogenic silica.

Collection of data regarding tropical forests was coordinated by Artaxo, as part of two Thematic Projects supported by the São Paulo Research Foundation — FAPESP: «GoAmazon: interactions of the urban plume of Manaus with biogenic forest emissions in Amazonia,» and «AEROCLIMA: direct and indirect effects of aerosols on climate in Amazonia and Pantanal.»

Previous studies have shown that naturally occurring methane in shallow aquifers is typically associated with a relatively strong biogenic signature indicated by depleted δ13C - CH4 and δ2H - CH4 compositions (32) coupled with high ratios of methane to higher - chain hydrocarbons (33), as we observed in Fig. 4B.

Eivind Valen, University of Copenhagen: «Biogenic mechanisms of small RNAs from protein coding genes»

The team is also using the results of this laboratory - based work to test the rates and mechanisms of biogenic uraninite dissolution in groundwater at the Pacific Northwest National Laboratory's Integrated Field Research Challenge site at Old Rifle, Colorado.

Yet another cause can be competitive inhibition of histamine degradation of DAO by other biogenic amines, alcohol (7 — 9), or drugs (10, 12, 40).

The direct and indirect radiative effects of biogenic secondary organic aerosol.

As evolving diatom populations expanded, a more efficient biological pump buried more CO2 at depth that is now detected as siliceous ooze or as biogenic opal deposits.

«However, textural and compositional similarities to features in terrestrial samples, which have been interpreted as biogenic, imply the intriguing possibility that the Martian features were formed by biotic activity,» the authors wrote in their paper.

We therefore understand why we are often asked about the use of recycled or biogenic plastics in our production processes.

I was accepted for a PhD studentship at Cardiff University looking at the structure and content of biogenic sediments from the Southern Ocean in order to reconstruct ocean and climate conditions over the last 20,000 years.

For instance, biogenic non-crystalline uranium is much more likely to oxidize into a water - soluble form than its crystalline counterparts.

226Ra / Ba ratios for dating Holocene biogenic carbonates in the Southern Ocean: preliminary evidence from coastal mollusc shells.

Primitive: that's how Dr. John Bargar describes the state of knowledge of the reactivity of biogenic uranite in ground water.

Supported by more than twenty - five years of university - based scientific studies, the capsules contained not only live probiotics, but also prebiotics (substances that nourish probiotics), organic acids and biogenic ingredients that promote a healthy digestive tract.

Coral reefs are typically massive biogenic formations of calcium carbonate (limestone) that is deposited within or around the bodies of the inhabitants of the reef as skeletal material.

These data indicate that under many atmospherically - relevant conditions SOA particles are significantly more viscous and orders of magnitude less volatile than assumed in traditional modeling approaches; SOA formation yields can be significantly higher than previously reported values; and anthropogenic pollution enhance loadings of SOA from biogenic precursors.

S2) are consistent with a deeper thermogenic methane source at the active sites and a more biogenic or mixed methane source for the lower - concentration samples from nonactive sites (based on the definition of Schoell, ref.

«They're absolutely not biogenic when seen in Technicolor» under a light microscope, Butterfield says.

Search for past life on Mars: Possible relic biogenic activity in Martian meteorite ALH84001.

Two important aerosol species, sulfate and organic particles, have large natural biogenic sources that depend in a highly complex fashion on environmental and ecological parameters and therefore are prone to influence by global change.

J.P. van der Sluijs, G.J. de Bruyn, and P. Westbroek, Biogenic Feedbacks in the Carbonate - Silicate Geochemical Cycle and the Global Climate, American Journal of Science, 296 (8), 1996, p.932 - 953.