Controlling nutrient losses from animal manures when they are landapplied is a critical factor in nutrient management, promoting environmental health and maintaining the sustainability of animal agriculture. Phosphorus is of particular concern due to its implication in eutrophication of surface waters and declines in water quality. We conducted a laboratory experiment to test the effect of seve...

Nutrient inputs from rivers play an important role in lake eutrophication. To compare the forms characteristics of phosphorus (P) and nitrogen (N) in rivers flowing through rural and urban areas, water samples were collected seasonally from five urban rivers and six rural rivers flowing to Lake Chaohu, China. Higher total phosphorus (TP), particulate phosphorus (PP), soluble reactive phosphorus...

Organic decomposition is a complex interaction between chemical, physical and biological processes, where the variety of aquatic vascular plants is essential for the trophic dynamics of freshwater ecosystems. The goal of this study was to determine the aquatic macrophyte Eichhornia azurea (Sw.) Kunth decomposition rate, the time relation with the limnological parameters, and whether this relati...

Measurements of nutrient and suspended matter concentrations and loads entering and leaving the Castanhão reservoir during the rainy season were carried out to assess the influence of this large reservoir on land-sea fluvial transport in the ephemeral Jaguaribe river basin. Spatial variation indicated statistically significant attenuation of concentrations only for total phosphorous and suspend...

1. The cell wall of Clostridium welchii (type A) contains alanine, 2,6-diaminopimelic acid, glutamic acid, glycine, glucosamine, muramic acid, galactosamine, mannosamine, ethanolamine, rhamnose, galactose and phosphorus. 2. Heating with formamide at 150 degrees resolved the wall into a formamide-soluble polysaccharide fraction and a formamide-insoluble mucopeptide fraction. 3. The formamide-sol...

Soil incubation and pot experiments were conducted to follow the sorption processes of added phosphorus (P) fertiliser using radioisotope tracer technique. Increasing doses P (40, 80, 160, 320 mg P/kg soil) Chernozem Arenosol incubated for 1, 3, 13 weeks. After incubation, perennial ryegrass (Lolium perenne L.) was sown in one group pots, experiment had been continuing another 9 The yield, gras...

Front Cover: Polymers Containing P-C Bonds in the main chain, wherein phosphorus(V), aromatic rings, and hydroxymethylene moieties are linked by bis(α-hydroxymethylene)phosphinic acid units, is synthesized via Abramov phosphonylation reaction as presented article 2200921 Siby Mathew, Yumiko Nakajima co-workers. The resulting polymers water soluble (pH > 10), display resilience against base cata...

Previous studies (1, 2) have shown that the phosphorus metabolism of mouse tissues is markedly altered by leukemic infiltration, the absorption and retention of radio-phosphorus being increased in the tissues of leukemic animals. The present work goes one step further in elucidating the seat of this altered phosphorus metabolism by fractionating the tissues into the three broad groups of biolog...