نتایج جستجو برای: organic phosphorus

تعداد نتایج: 238418  

2017
A. R. Armitage James W. Fourqurean J. W. Fourqurean

The carbon sequestration potential in coastal soils is linked to aboveground and belowground plant productivity and biomass, which in turn, is directly and indirectly influenced by nutrient input. We evaluated the influence of longterm and near-term nutrient input on aboveground and belowground carbon accumulation in seagrass beds, using a nutrient enrichment (nitrogen and phosphorus) experimen...

2003
R. J. ANDERSON

It has been shown in earlier reports1 that the organic phosphorus compounds of wheat bran which have been isolated after digesting the bran in 0.2 per cent hydrochloric acid differ in composition and properties from phytin or inosite hexaphosphate. It has been found that under these conditions several organic phosphoric acids are obtained. Of these we have isolated and identified t,wo; viz., in...

Journal: :Applied and environmental microbiology 1997
I T Miettinen T Vartiainen P J Martikainen

The availability of organic carbon is considered the key factor to regulate microbial regrowth in drinking water network. However, boreal regions (northern Europe, Russia, and North America) contain a large amount of organic carbon in forests and peatlands. Therefore, natural waters (lakes, rivers, and groundwater) in the northern hemisphere generally have a high content of organic carbon. We f...

2011
Nicholas R. Johnson Jane E. Hill

Many types of organic phosphorus (P) molecules exist in environmental samples. Traditional P measurements do not detect these organic P compounds since they do not react with colorimetric reagents. Enzymatic hydrolysis (EH) is an emerging method for accurately characterizing organic P forms in environmental samples. This method is only trumped in accuracy by Phosphorus-31 Nuclear Magnetic Reson...

Journal: :Journal of environmental monitoring : JEM 2012
K W King J C Balogh S G Agrawal C J Tritabaugh J A Ryan

Excess phosphorus, particularly in surface waters can lead to severe eutrophication. Identifying source areas, quantifying contributions, and evaluating management practices are required to address current and future water quality concerns. A before-after study was conducted from 2003-2010 on a sub-watershed of Northland Country Club Golf Course in Duluth, MN to demonstrate the impacts of two d...

Journal: :Biomedical and environmental sciences : BES 2008
Lin Wang Li-Jing Huang Luo-Jia Yun Fei Tang Jing-Hui Zhao Yan-Qun Liu Xin Zeng Qi-Fang Luo

OBJECTIVE To study the possibility of removing nitrogen, phosphorus, and organic pollutants using seeding type immobilized microorganisms. METHODS Lakes P and M in Wuhan were chosen as the objects to study the removal of nitrogen, phosphorus, and organic pollutants with the seeding type immobilized microorganisms. Correlations between the quantity of heterotrophic bacteria and the total nitro...

2015
Binyang Jia Ya Tang Liyan Tian Leander Franz Christine Alewell Jen-How Huang

Fish farming has seriously influenced the aquatic environment in Sancha reservoir in SW China since 1985 and has been strongly restricted since 2005. Thus, phosphorus speciation in a sediment core dated between 1945 and 2010 at cm-resolution and in surface sediments from Sancha reservoir may allow us track how fish farming impacts phosphorus dynamics in lake sediments. Fish farming shifts the m...

2010
Klaus Wallmann

[1] The phosphorus budget of the prehuman modern ocean is constrained applying the most recent estimates of the natural riverine, eolian, and ice‐rafted input fluxes; the phosphorus burial in marine sediments; and the hydrothermal removal of dissolved phosphate from the deep ocean. This review of current flux estimates indicates that the phosphorus budget of the ocean is unbalanced since the ac...

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