It was concluded in a previous paper (1) that the enhancement of respiration by inorganic orthophosphate, occurring in rat liver mitochondria oxidizing a number of Krebs cycle metabolites or glutamate in the presence of 2,4-dinitrophenol or Dicumarol, is due to the substrate level phosphorylation linked to the oxidation of a-ketoglutarate which is not uncoupled by these agents. Yet, no requirem...

The discharge of industrial effluent constituting high orthophosphates and organic pollutants in water receiving bodies compromises freshwater quality perpetuates eutrophication. In this study, an anaerobic–aerobic sequencing batch reactor (SBR) under activated sludge was investigated for chemical oxygen demand (COD) removal from brewery wastewater. Raw wastewater samples were collected on a da...

Phosphorus (P) regeneration and transformation in the oceanic water column and in marine sediments depends on the chemical nature of the sinking particulate P pool. For the first time, we have characterized the molecular composition of this pool, in various oceanic settings and water depths, using P nuclear magnetic resonance (NMR) spectroscopy. Both inorganic P (orthophosphate, pyrophosphate, ...

It was concluded in a previous paper (1) that the enhancement of respiration by inorganic orthophosphate, occurring in rat liver mitochondria oxidizing a number of Krebs cycle metabolites or glutamate in the presence of 2,4-dinitrophenol or Dicumarol, is due to the substrate level phosphorylation linked to the oxidation of a-ketoglutarate which is not uncoupled by these agents. Yet, no requirem...

Two types of extracellular acid phosphatases are synthesized by Aspergillusficuum NRRL 3135: a nonspecific orthophosphoric monoester phosphohydrolase (EC 3.1.3.2) with an optimum pH of 2.0, and an enzyme with restricted specificity, a mesoinositol-hexaphosphate phosphohydrolase (EC 3.1.3.8; phytase) with an optimum pH of 5.5. Although the pH 5.5 enzyme is termed a phytase, both enzymes hydrolyz...

The pyruvate, orthophosphate dikinase (PPDK, EC 2.7.9.1), crucial plant enzyme in the process of concentrating CO2 for Calvin cycle, catalyzes phosphoenolpyruvate-regeneration phase of the C4 photosynthetic pathway [1]. However plants possess also nonphotosynthetic isoform of PPDK, which functions are less understood, probably due to its low abundance [2]. In all plants, PPDK is located in both...

An approach is presented for the on-site treatment of diluted swine waste. The approach (1) incorporates anaerobic digestion with an anaerobic sequencing batch reactor (ASBR) to stabilize waste, reduce odor, and reduce solids and organic compounds, while producing biogas; (2) increases the ortho-phosphate concentration of the anaerobic digester effluent by enhanced biological phosphorus removal...

In early 1980s, researchers discovered self-setting calcium orthophosphate cements, which are bioactive and biodegradable grafting bioceramics in the form of a powder and a liquid. After mixing, both phases form pastes, which set and harden forming either a non-stoichiometric calcium deficient hydroxyapatite or brushite. Since both of them are remarkably biocompartible, bioresorbable and osteoc...