Effects of fine bubble aeration at the sediment‒water interface on distributions of organic phosphorus fractions and related microbial activity in a heavily urban river

Slices of cat brain respiring in a Krebs–Ringer bicarbonate medium were found to incorporate inorganic phosphate labelled with P32 into two non-nucleotide protein-bound phosphorus fractions, which are referred to as the residue organic phosphorus (ROP) and the "phosphoprotein" (PP), respectively. The addition of glucose or mannose to the medium increased the incorporation into both fractions. The addition of fructose, galactose, pyruvate, lactate, succinate, or L-glutamate failed to increase the incorporation into either fraction.Anaerobic conditions, homogenization of the tissue, or the addition of a wide range of metabolic inhibitors (cyanide, azide, iodoacetate, fluoride, nembutal, malononitrile, chloretone) inhibited the incorporation. The incorporation was also inhibited by 2,4-dinitrophenol in concentrations that do not inhibit oxygen consumption.These results are compared and contrasted with previous findings on the incorporation of P32 into the lipid phosphorus and pentosenucleic acid of brain slices.

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Phosphorus changes during the leaching and decomposition of hayed-off pasture plants

Australian Journal of Agricultural Research ◽

10.1071/ar9690653 ◽

1969 ◽

Vol 20 (4) ◽

pp. 653 ◽

Cited By ~ 32

Author(s):

OL Jones ◽

SM Bromfield

Keyword(s):

Microbial Activity ◽

Inorganic Phosphate ◽

Organic Phosphorus ◽

The Other ◽

Other Hand ◽

Dry Conditions ◽

Pasture Plants ◽

Inorganic And Organic

Ground samples of hayed-off pasture plants were decomposed in the laboratory under continuously moist, and intermittently moist and dry, conditions. During the course of decomposition they were leached at different frequencies and the resulting changes in inorganic and organic phosphorus measured. The dissolution of superphosphate and its conversion to organic phosphorus were also studied under some of these conditions.Inorganic phosphate was readily leached from the samples when microbes were inhibited. Microbial activity, on the other hand, largely prevented the loss of inorganic phosphate by leaching from a phalaris sample over a period of 3 months. Intermittent drying increased the amount of phosphate leached from decomposing plants but the leaching frequencies examined had little effect. The percentage of the phosphorus leached from plants varied with the type of material. In all cases less than half was recovered as inorganic phosphate, even after decomposition and leaching for 6 months. When superphosphate granules were leached in the presence of decomposing plants the conversion of fertilizer phosphate to organic phosphorus was small, but the dissolution of phosphate was sometimes retarded. The recycling of phosphate in hayed-off pastures is discussed in the light of these results.

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INCORPORATION OF RADIOACTIVE PHOSPHATE INTO NON-NUCLEOTIDE PROTEIN-BOUND PHOSPHORUS FRACTIONS OF RESPIRING CAT BRAIN SLICES

Canadian Journal of Biochemistry and Physiology ◽

10.1139/o54-055 ◽

1954 ◽

Vol 32 (5) ◽

pp. 504-514 ◽

Cited By ~ 19

Author(s):

Muriel Findlay ◽

K. P. Strickland ◽

R. J. Rossiter

Keyword(s):

Inorganic Phosphate ◽

Organic Phosphorus ◽

Brain Slices ◽

Phosphorus Fractions ◽

Metabolic Inhibitors ◽

Lipid Phosphorus ◽

Wide Range ◽

Cat Brain

Slices of cat brain respiring in a Krebs–Ringer bicarbonate medium were found to incorporate inorganic phosphate labelled with P32 into two non-nucleotide protein-bound phosphorus fractions, which are referred to as the residue organic phosphorus (ROP) and the "phosphoprotein" (PP), respectively. The addition of glucose or mannose to the medium increased the incorporation into both fractions. The addition of fructose, galactose, pyruvate, lactate, succinate, or L-glutamate failed to increase the incorporation into either fraction.Anaerobic conditions, homogenization of the tissue, or the addition of a wide range of metabolic inhibitors (cyanide, azide, iodoacetate, fluoride, nembutal, malononitrile, chloretone) inhibited the incorporation. The incorporation was also inhibited by 2,4-dinitrophenol in concentrations that do not inhibit oxygen consumption.These results are compared and contrasted with previous findings on the incorporation of P32 into the lipid phosphorus and pentosenucleic acid of brain slices.

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Influence of urban river restoration on nitrogen dynamics at the sediment-water interface

PLoS ONE ◽

10.1371/journal.pone.0212690 ◽

2019 ◽

Vol 14 (3) ◽

pp. e0212690 ◽

Cited By ~ 2

Author(s):

Anna M. Lavelle ◽

Nic R. Bury ◽

Francis T. O’Shea ◽

Michael A. Chadwick

Keyword(s):

River Restoration ◽

Nitrogen Dynamics ◽

Urban River ◽

Water Interface ◽

Urban River Restoration

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QM/MM simulations of organic phosphorus adsorption at the diaspore–water interface

Physical Chemistry Chemical Physics ◽

10.1039/c9cp04032c ◽

2019 ◽

Vol 21 (44) ◽

pp. 24316-24325 ◽

Cited By ~ 4

Author(s):

Prasanth B. Ganta ◽

Oliver Kühn ◽

Ashour A. Ahmed

Keyword(s):

Surface Water ◽

Molecular Mechanisms ◽

Organic Phosphorus ◽

Md Simulations ◽

Available Phosphorus ◽

Water Interface ◽

Mineral Surfaces ◽

Soil Mineral ◽

Phosphorus Adsorption ◽

Binding Process

The available phosphorus for plants is mainly affected by the strong binding of phosphates to soil mineral surfaces. Here, we have investigated the molecular mechanisms for this binding process at the surface–water interface by QM/MM MD simulations.

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