General comments: The authors test the impact of nutrient supply and nutrient stoichiometry on production, partitioning and elemental composition of phytoplanktonderived dissolved (DOC, DON, DOP) and particulate (POC, PON, POP) organic matter in shipboard mesocosm incubations conducted at three nutrient enrichment concentrations. They present clear observations of a decline in organic matter pr...

[1] We examined controls on the carbon isotopic composition of sea ice brines and organic matter during cruises to the Ross Sea, Antarctica in November/December 1998 and November/December 2006. Brine samples were analyzed for salinity, nutrients, total dissolved inorganic carbon (SCO2), and the C/C ratio of SCO2 (d 13CSCO2). Particulate organic matter from sea ice cores was analyzed for percent...

Ocean colour is the water-leaving radiance in the visible and near-infrared just above the ocean surface owing to selective absorption and scattering by phytoplankton and its pigments such as chlorophyll, as well as dissolved organic matter and suspended particulate matter in the subsurface ocean waters. Ocean colour carries useful information concerning biogeochemical properties of the water b...

Carbon compounds account for a large fraction of airborne particulate matter (‘carbonaceous aerosols’). Their presence raises a number of scientific questions dealing with climate issues and possible effects on human health. This review describes the current state of knowledge with respect to the ambient concentrations levels (elemental carbon, organic carbon and organic matter) and the various...

In the year 1974, Larry Pomeroy first proposed that microbes were true movers of energy and nutrients in marine food webs (Pomeroy, 1974). This idea was later formalized as the “microbial loop” (Azam et al., 1983; Pomeroy et al., this issue) in which energy and carbon lost from the planktonic food web in the form of dissolved organic matter (DOM) was recovered and repackaged by heterotrophic ba...

Along a west-to-east axis spanning the Galicia Bank region (Iberian margin) and the Mediterranean basin, a reduction in surface primary productivity and in seafloor flux of particulate organic carbon was mirrored in the in situ organic matter quantity and quality within the underlying deep-sea sediments at different water depths (1200, 1900 and 3000 m). Nematode standing stock (abundance and bi...

The membrane fouling index, widely used in the reverse osmosis (RO) membrane industry, is developed mainly to assess the fouling potential of particulate matter. However, the fouling potential by organic matter should also be accurately evaluated as the productivity loss by organic fouling is often more severe than particle fouling, despite its low concentration in feed water. This study was pe...

Organic aerosols are a major component of particulate matter but have complex and uncertain effect on climate health.

Submit Manuscript | http://medcraveonline.com Abbreviations: CCRs: Cumulative Cancer Risks; ETS: Environmental Tobacco Smoking; HAPs: Hazardous Air Pollutants; HEATS: Houston Exposure to Air Toxics Study; OVM: Organic Vapor Monitor (3MTM); PAHs: Polycyclic Aromatic Hydrocarbons; PM2.5: Particles Less Than 2.5 Micrometers in Diameter, Fine Particulate Matter; RIOPA: Relationship Among Indoor, Ou...

background: contemporary development of growing urban communities and increasing the economical and industrial activities in the current century without paying attention to assess the effect of these activities on human health, as the axis of the development, is caused urban air pollution and risks from different pollutant emissions. tehran air pollution has received considerable media coverage...