Sentences with phrase «of microbial decomposition»

(263) Biodegradable is defined in the standard as «capable of microbial decomposition within 24 months in soil (with the exception of plant biomass), one month in aerated water, two months in anaerobic water, with minimal impact on the environment» (see 3.10 in CAN / CGSB -32.310).

Not exact matches

Synthetic fertilizer is available as a variety of commercial products, with different nitrogen - release times, whereas manure and pulse crops need to be broken down by microbial decomposition before nitrogen becomes available.

Rapid decomposition facilitated by warm temperatures and abundant moisture in these same tropical regions slowed the accumulation of organic matter that was not protected from microbial decomposers.

Model simulations can always be improved by testing predictions against field data collected from different ecosystems, and Sulman and Phillips are doing just that: investigating how roots influence soil decomposition and protected forms of carbon in forests that vary in the composition of tree and microbial communities.

Plus, Science's Emily Underwood wades into the muddled world of migraine research, and Jessica Metcalf talks about using modern microbial means to track mammalian decomposition.

This was associated with a change in the soil microbial community and an increase in the number of enchytraeid worms — these worms are the main soil fauna in peatlands that are responsible for decomposition.

Researchers note that the new carbon storage is not forever, since future warming will likely start rethawing some of the permafrost and release some of the carbon in it via microbial decomposition.

They write, «We show that anaerobic microsites are important regulators of soil carbon persistence, shifting microbial metabolism to less efficient anaerobic respiration and selectively protecting otherwise bioavailable, reduced organic compounds such as lipids and waxes from decomposition.

A new study led by the University of Colorado Boulder and the University of California, San Diego indicates unique and changing microbial communities present during the decomposition of human cadavers look to be a reliable «clock» for forensic scientists.

Risk Assessment Form (3) Required for projects using hazardous chemicals, activities or devices, and some PHBA's including protists, composting, coliform test kits, decomposition of vertebrate organisms and microbial fuel cells and must be completed and signed by the DS or QS prior to student experimentation.

The process is entirely analogous to slowly defrosting a freezer full of food — it starts to outgas as microbial decomposition sets in.

The sequestration potential also depends on the chemical characteristics of the soil organic matter and its ability to resist microbial decomposition.

The metabolic processes that are responsible for plant growth and maintenance and the microbial turnover, which is associated with dead organic matter decomposition, control the cycle of carbon, nutrients, and water through plants and soil on both rapid and intermediate time - scales.

First, the flooding of large stocks of terrestrial organic matter may fuel microbial decomposition, converting the organic matter stored in above and below ground biomass to carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O).

Furthermore, unlike methane hydrates (see below), the very large stocks of permafrost soil carbon (i.e., the 1,672 Gt C of Tarnocai et al., 2009) must first undergo anaerobic microbial fermentation to produce methane, itself a gradual decomposition process.

Re # 119 Richard LaRosa: I don't suppose you have considered the impact of such a scheme on plankton and plankton - based food chains, or microbial decomposition pathways in surface waters, etc?

Important to understand most plants diffuse massive amounts of air into the wastewater to provide the 02 source for microbial decomposition.