نتایج جستجو برای: phosphorus inflow

تعداد نتایج: 50839  

Journal: :Archives of Hygiene Sciences 2022

Background & Aims of the Study: Anaerobic baffled reactor (ABR) is one low-cost wastewater treatment systems; however, it has some limitations, such as insufficient standard nutrient outflow. Accordingly, should be studied and developed. This research aims to determine efficiency a five-sectional pilot upgrade with an integrated aerated media filter in (integrated reactor) for municipal tre...

Journal: :Chest 1994
E Fiaccadori E Coffrini C Fracchia C Rampulla T Montagna A Borghetti

In 22 patients (19 men, 3 women; mean [+/- SD] age, 63 +/- 6 years) with chronic obstructive pulmonary disease (COPD), phosphorus content was measured by spectrophotometric methods on muscle fragments of both peripheral (quadriceps femoris needle biopsy in 22 patients) and respiratory muscles (external intercostal muscle surgical biopsy in 14 patients). Thirty age- and sex-matched subjects were...

2016
Edwin T. H. M. Peeters Rozemarijn E. M. Neefjes Bastiaan G. van Zuidam

Nutrients can determine the outcome of the competition between different floating plant species. The response of floating plants to current phosphorus levels may be affected by previously experienced phosphorus concentrations because some species have the ability to store excess phosphorus for later use. This might have an impact on their competition. Here, we investigate the effect of previous...

Journal: :Water 2021

The eutrophic Lake Eichbaumsee, a ~1 km long and 280 m wide (maximum water depth 16 m) dredging lake southeast of Hamburg (Germany), has been treated for quality improvements using various techniques (i.e., aeration plants, removal dissolved phosphorous by aluminum precipitation, Bentophos® (Phoslock Environmental Technologies, Sydney, Australia), adsorption) during the past ~15 years. Despite ...

2017
Scott T. McClure Alex R. Chang Elizabeth Selvin Casey M. Rebholz Lawrence J. Appel

Interest in the health effects of dietary phosphorus is burgeoning, yet sources and trends in phosphorus consumption have not been well characterized. We describe trends in and primary sources of dietary phosphorus in a nationally representative sample of 34,741 US adults, 20+ years old (NHANES 2001-2014). Dietary sources of phosphorus were estimated in nine food groups and 26 food categories. ...

Journal: :Archives of insect biochemistry and physiology 2004
Marc C Perkins H Arthur Woods Jon F Harrison James J Elser

Although phosphorus has long been considered an important factor in the growth of diverse biota such as bacteria, algae, and zooplankton, insect nutrition has classically focused on dietary protein and energy content. However, research in elemental stoichiometry has suggested that primary producer biomass has similar N:P ratios in aquatic and terrestrial systems, and phosphorus-rich herbivores ...

2014
Gregory G. Shellenbarger David H. Schoellhamer

SHELLENBARGER, G.G. and SCHOELLHAMER, D.H., 2011. Continuous salinity and temperature data from San Francisco estuary, 1982–2002: Trends and the salinity–freshwater inflow relationship. Journal of Coastal Research, 27(6), 1191–1201. West Palm Beach (Florida), ISSN 0749-0208. The U.S. Geological Survey and other federal and state agencies have been collecting continuous temperature and salinity ...

2015
C.-M. Chang

The influence of the temporal changes in lateral inflow rate on the discharge variability in stream channels is explored through the analysis of the diffusion wave equation (i.e. the linearized Saint-Venant equation). To account for variability and uncertainty, the lateral inflow rate is regarded as a temporal random function. On the basis of the spectral representation theory, analytical expre...

2016
Peng Gao Yong-Sheng Sun

Coal-based reduction followed by magnetic separation is an effective way to recover iron from high phosphorus-containing oolitic hematite ore. Given that high quantities of dephosphorization agent are needed to obtain low phosphorus reduced iron, a novel approach is proposed by the authors. Without prior phosphorus removal, the phosphorus was enriched in the reduced iron during a reduction proc...

2013
L. M. Zamora J. M. Prospero D. A. Hansell J. M. Trapp

[1] Biogeochemical studies show that the surface waters of the subtropical North Atlantic are highly phosphorus (P) stressed. Human activity may exacerbate phosphorus stress by enhancing atmospheric nitrogen (N) deposition and raising N/P ratios in deposition. However, the magnitude of this effect is unclear, in part, because atmospherically deposited phosphorus sources are not well known, part...

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