Sentences with phrase «inorganic sources»

Some geophysicists insist that methane on Earth arises from inorganic sources (e.g., carbide minerals), not just from life (either end of a cow) and its decay (coal).

This is strong evidence that the long term accumulation in atmospheric carbon dioxide (from both organic and inorganic sources) is a natural process....

Mirando et al. (1993) showed that sows provided with the chelated forms of zinc (Zn), manganese (Mn) and copper (Cu) in their diet had a greater number of live fetuses 30 d after breeding than those given these trace minerals solely from inorganic sources.

Proteinated forms of Zn, Mn and Cu were added to replace 53, 20 and 14 mg / kg of diet, respectively, of the elemental inorganic sources.

Sari's research focuses on microbes that control the carbon cycle in habitats where organisms can not fix enough carbon from inorganic sources like carbon dioxide to sustain their food webs.

Like lead, mercury and other metals, arsenic is toxic when it comes from an inorganic source.

Not exact matches

Each of these dualisms (organic - inorganic, instinct - intelligence) derived from a more fundamental source; in the first case, the primordial flux, and in the second case, consciousness (CE 204).

Since rice is grown in flooded fields, however, it is the highest food source of inorganic arsenic.

He conducted the research with Jeff Urban, Facility Director of the Inorganic Nanostructures Facility at the Molecular Foundry, and a team of scientists that included staff at the Advanced Light Source.

Although some lakes can also absorb CO2 at their surfaces similar to the way oceans do, the increases in these other sources of organic and inorganic carbon are likely the dominant factor, says Scott Higgins, a research scientist at the International Institute for Sustainable Development's Experimental Lakes Area, a natural laboratory of 58 small lakes in Ontario.

Freshwater such as lakes, though, receive various sources of carbon dioxide from decomposing organic and inorganic matter swept into them, which makes it hard for scientists to distinguish between the direct effects of rising atmospheric CO2 and these other elements.

Most commercial solar cells use inorganic semiconductors to convert sunlight into a steady stream of electrons that can serve as a power source.

The flux of nutrients associated with this discharge consists of an annual median of three million tonnes of nitrogen, twenty thousand of phosphorus, and three million of silica, which represent a magnitude of inorganic nutrients comparable to that of external sources traditionally considered in marine studies, such as the atmospheric deposition and riverine runoff.

Although new technologies have already been developed for the recovery of dissolved inorganic phosphates in the liquid fractions of municipal and agricultural wastes, solid residues remain a largely untapped source for phosphorus in its organic form.

«I'm not aware of any state where ammonium nitrate is predominant source [of inorganic fertilizer] where 30, 40 years ago it might have been,» Ferguson told TechNewsDaily.

Aerosols are solid or liquid particles suspended in the atmosphere, consisting of (in rough order of abundance): sea salt, mineral dust, inorganic salts such as ammonium sulfate (which has natural as well as anthropogenic sources from e.g. coal burning), and carbonaceous aerosol such as soot, plant emissions, and incompletely combusted fossil fuel.

«The source of the inorganic materials blocking the water separator drum holes had not been experienced during an EVA before,» it was stressed, «and is still undergoing a concurrent investigation.»

Researchers Dr. James Gerken and Dr. Shannon Stahl at CME used two metal - free catalysts, an organic nitroxyl (R2NO) molecule and inorganic nitrogen oxide (NOx) source, to promote oxygen reduction.

They limited data sources to locations around the world in which paleoceanographic data also exist, using seven variables: salinity; potential temperature; oxygen isotope ratios in water; carbon isotope ratios in dissolved inorganic carbon; and concentrations of phosphate, nitrate, and dissolved oxygen.

Biologists were surprised to discover that the ecosystems found on the ocean floor along these mid-ocean ridges, consisting of complex organisms like tube worms, clams, and crabs, were dependent for their food on thermophilic chemosynthetic bacteria, which produced organic compounds using the oxidation of inorganic molecules as an energy source, instead of sunlight.

Your two principal sources of mercury exposure are inorganic mercury from dental amalgams and methylmercury from seafood consumption; these two types of mercury differ in their toxicity levels, biological effects and detoxification pathways

Manganese and iron act to displace copper from the liver; vitamin B6 and niacin promote reversal of copper overload; molybdenum and sulfur, which act in the intestines, facilitate its excretion; and vitamin C, very importantly, chelates copper in the blood to facilitate its removal.107 By emphasizing food sources of these nutrients, inorganic copper can be mobilized and circulated out of the system with minimum disruption.

In contrast, if they come from an inorganic or metallic source, such as heavy metals, they are toxic.

For people in the United States and Europe, rice is the largest dietary source of inorganic arsenic, said Andrew Meharg, chair of biogeochemistry at the University of Aberdeen in Scotland.

And, chelated minerals are more easily absorbed into the bloodstream than inorganic mineral sources.

Both geologic organic C and gelogic inorganic C are sources of CO2 to the atmopshere, ocean, and vegetation and soil.

Real Climate defines «aerosols» as ``... solid or liquid particles suspended in the atmosphere, consisting of (in rough order of abundance): sea salt, mineral dust, inorganic salts such as ammonium sulfate (which has natural as well as anthropogenic sources from e.g. coal burning), and carbonaceous aerosol such as soot, plant emissions, and incompletely combusted fossil fuel.»

Magnitudes and sources of dissolved inorganic phosphorus inputs to surface fresh waters and the coastal zone: A new global model: Global DIP loading to surface waters

My analysis of the isotope data indicates that about one third of the CO2 accumulation is from organic sources and two - thirds from inorganic.

Are there no significant biological sources of inorganic material?

Direct anthropogenic sources such as coal combustion, however, still release large amounts of inorganic mercury into the atmosphere, either as gaseous elemental mercury (GEM; Hg °) or as divalent gaseous mercury species (Hg2 +)(3).

It's absurd, however, for multitudes of stories to focus so heavily on «sushi abuse» when we are all exposed to and ingesting mercury, both organic and inorganic, from multiple environmental sources, including the mercury amalgams in our teeth.

For a comprehensive GCM I can count oceans, land, atmosphere, ice, biological processes, organic and inorganic chemical processes, human - made sources and other effects, radiative energy transport, conduction and convective heat transfer, phase change, clouds and aerosols, as some of the important system components, phenomena, and processes.

Established Strategic Sourcing steering committees to address new product development needs for inorganic top line growth and support marketing solutions and BPO service, manufacturing, and logistics.