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Phosphorus

About: Phosphorus is a research topic. Over the lifetime, 53120 publications have been published within this topic receiving 939731 citations. The topic is also known as: element 15 & P.


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Journal ArticleDOI
Liqun Sun1, Mingjuan Li1, Kai Sun1, Shihua Yu1, Rongshun Wang1, Haiming Xie1 
TL;DR: In this article, a high-pressure and high-temperature (HPHT) method was used to synthesize black phosphorus (black P) as an anode material for lithium-ion batteries.
Abstract: Black phosphorus (black P), which is a promising candidate as an anode material for lithium-ion batteries, was synthesized by a high-pressure and high-temperature (HPHT) method from white and red phosphorus. The study revealed the electrochemical activity of pure black P under different pressures and temperatures systematically. The sample shows higher crystallinity and purity by the HPHT method. Lithium-ion batteries containing black phosphorus as anode materials exhibited a high specific capacity and excellent cycling performance. Black phosphorus obtained from white phosphorus exhibited the highest first discharge and charge capacities of 2505 and 1354 mAh·g–1 at 4 GPa and 400 °C and that obtained from red phosphorus exhibited the highest first discharge and charge capacities of 2649 and 1425 mAh·g–1 at 4.5 GPa and 800 °C. Black P was characterized by X-ray diffraction, Raman microscopy, scanning electron microscopy, and high-resolution transmission electron microscopy.

251 citations

Journal ArticleDOI
TL;DR: Phosphorus balance in chronic renal insufficiency is determined primarily by the net amount absorbed by the bowel and the quantity removed during dialytic therapy, and large doses are often necessary to attain satisfactory control of phosphorus.

251 citations

Journal ArticleDOI
TL;DR: The variability in the phosphorus content of the microalgal biomass shows that with this new understanding of the luxury uptake mechanism there is the potential to optimize WSP for biological phosphorus removal.
Abstract: Phosphorus removal in waste stabilization ponds (WSP) is highly variable, but the reasons for this are not well understood. Luxury uptake of phosphorus by microalgae has been studied in natural systems such as lakes but not under the conditions found in WSP. This work reports on the effects of phosphate concentration, light intensity, and temperature on luxury uptake of phosphorus by WSP microalgae in continuous culture bioreactors. Increasing temperature had a statistically significant "positive effect" on intracellular acid-insoluble polyphosphate concentration. It is likely that elevated temperature increased the rate of polyphosphate accumulation, but because the biomass was not starved of phosphate, the stored acid-insoluble polyphosphate was not utilized. Increasing light intensity had no effect on acid-insoluble polyphosphate but had a "negative effect" on the acid-soluble polyphosphate. A possible explanation for this is that the faster growth rate at high light intensity results in this form of polyphosphate being utilized by the cells for synthesis of cellular constituents at a rate that exceeds replenishment. The variability in the phosphorus content of the microalgal biomass shows that with this new understanding ofthe luxury uptake mechanism there is the potential to optimize WSP for biological phosphorus removal.

250 citations

Journal ArticleDOI
TL;DR: In this article, a mechanistic model of the coupled oceanic iron and phosphorus cycles is proposed, which includes scavenging onto sinking particles, complexation with an organic ligand, and a prescribed aeolian source.
Abstract: [1] We formulate a mechanistic model of the coupled oceanic iron and phosphorus cycles The iron parameterization includes scavenging onto sinking particles, complexation with an organic ligand, and a prescribed aeolian source Export production is limited by the availability of light, phosphate, and iron We implement this biogeochemical scheme in a coarse resolution ocean general circulation model using scavenging rates and conditional stability constants guided by laboratory studies and a suite of box model sensitivity studies The model is able to reproduce the broad regional patterns of iron and phosphorus In particular, the high macronutrient concentrations of the Southern Ocean, tropical Pacific, and subarctic Pacific emerge from the explicit iron limitation of the model In addition, the model also qualitatively reproduces the observed interbasin gradients of deep, dissolved iron with the lowest values in the Southern Ocean The ubiquitous presence of significant amounts of free ligand is also explicitly captured We define a tracer, Fe* which quantifies the degree to which a water mass is iron limited, relative to phosphorus Surface waters in high-nutrient, lowchlorophyll regions have negative Fe* values, indicating Fe limitation The extent of the decoupling of iron and phosphorus is determined by the availability and binding strength of the ligand relative to the scavenging by particulate Global iron concentrations are sensitive to changes in scavenging rate and physical forcing Decreasing the scavenging rate 40% results in � 01 nM increase in dissolved iron in deep waters Forcing the model with weaker wind stresses leads to a decrease in surface [PO4] and [Fe ]i n the Southern Ocean due to a reduction in the upwelling strength

250 citations

Journal ArticleDOI
TL;DR: It is found that the metabolome of nutrient-limited yeast varies dramatically with the limiting nutrient's identity, and low glutamine is a hallmark of nitrogen limitation, ATP of phosphorus limitation, and pyruvate of carbon limitation.
Abstract: Microbes tailor their growth rate to nutrient availability. Here, we measured, using liquid chromatography-mass spectrometry, >100 intracellular metabolites in steady-state cultures of Saccharomyces cerevisiae growing at five different rates and in each of five different limiting nutrients. In contrast to gene transcripts, where approximately 25% correlated with growth rate irrespective of the nature of the limiting nutrient, metabolite concentrations were highly sensitive to the limiting nutrient's identity. Nitrogen (ammonium) and carbon (glucose) limitation were characterized by low intracellular amino acid and high nucleotide levels, whereas phosphorus (phosphate) limitation resulted in the converse. Low adenylate energy charge was found selectively in phosphorus limitation, suggesting the energy charge may actually measure phosphorus availability. Particularly strong concentration responses occurred in metabolites closely linked to the limiting nutrient, e.g., glutamine in nitrogen limitation, ATP in phosphorus limitation, and pyruvate in carbon limitation. A simple but physically realistic model involving the availability of these metabolites was adequate to account for cellular growth rate. The complete data can be accessed at the interactive website http://growthrate.princeton.edu/metabolome.

249 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
20232,479
20225,004
20211,546
20201,644
20191,746