• reaction
  • An excess of phosphorus is used in order to prevent formation of PBr5: 2 P + 3 Br2 → 2 PBr3 Because the reaction is highly exothermic, it is often conducted in the presence of a diluent such as PBr3. (wikipedia.org)
  • PBr3
  • PBr3 + 3 ROH → 3 RBr + HP(O)(OH)2 The mechanism (shown for a primary alcohol) involves formation of a phosphorus ester (to form a good leaving group), followed by an SN2 substitution. (wikipedia.org)
  • Biochemistry
  • Phosphorus is found in many organic molecules and so phosphorus-32 has many applications in medicine, biochemistry and molecular biology where it can be used to trace phosphorylated molecules, e.g. in elucidating metabolic pathways, and radioactively label DNA. (wikipedia.org)
  • Phosphorus-32 has important uses in medicine, biochemistry and molecular biology. (wikipedia.org)
  • citation needed
  • Its flash point is about 100 °C.[citation needed] Exposure to "strike anywhere" matches containing phosphorus sesquisulfide can cause contact dermatitis, usually in the pocket area but also on the face. (wikipedia.org)
  • citation needed] The availability of phosphorus in an ecosystem is restricted by the rate of release of this element during weathering. (wikipedia.org)
  • organisms
  • Phosphorus is a limiting nutrient for aquatic organisms. (wikipedia.org)
  • Phosphorus is a finite (limited) resource that is widespread in the Earth's crust and in living organisms but is relatively scarce in concentrated forms, which are not evenly distributed across the Earth. (wikipedia.org)
  • toxic
  • In the laboratory it may be more convenient to use the less toxic red phosphorus. (wikipedia.org)
  • In this situation it is the longterm toxic effects of beta radiation from phosphorus-32 accumulating in the cancerous cells which has the therapeutic effect.The Phosphorus-32 is widely used radioisotope for cancer detection and treatment, especially in eyes and skin cancer. (wikipedia.org)
  • sufficiently
  • The beta radiation emitted by the phosphorus-32 is sufficiently penetrating to be detected outside the organism or tissue which is being analysed Many radioisotopes are used as tracers in nuclear medicine, including iodine-131, phosphorus-32, and technetium-99m. (wikipedia.org)
  • abundant
  • Phosphorus is abundant in biological systems and, as a radioactive isotope is almost chemically identical with stable isotopes of the same element, phosphorus-32 can be used to label biological molecules. (wikipedia.org)
  • silicon
  • An international team of researchers has recently announced the completion of the smallest transistor ever made, built out of a single phosphorus atom in silicon. (thefutureofthings.com)
  • soil
  • Phosphorus is found in water, soil, and sediments. (learner.org)
  • The phosphorus-32-labelled fertiliser is given to the plant hydroponically or via water in the soil and the usage of the phosphorus can be mapped from the emitted beta radiation. (wikipedia.org)
  • Low concentration of phosphorus in soils reduces plant growth, and slows soil microbial growth - as shown in studies of soil microbial biomass. (wikipedia.org)
  • Phosphorus does not enter the atmosphere, remaining mostly on land and in rock and soil minerals. (wikipedia.org)
  • however, the processes that move them through the soil or ocean are very slow, making the phosphorus cycle overall one of the slowest biogeochemical cycles. (wikipedia.org)
  • sediments
  • Phosphorus rich deposits have generally formed in the ocean or from guano, and over time, geologic processes bring ocean sediments to land. (wikipedia.org)
  • structure
  • In the journal Angewandte Chemie , scientists have now introduced a new, interesting variant: a phosphorus-containing rubber with a structure that corresponds to that of natural rubber. (eurekalert.org)
  • At still higher temperatures, P2 dissociates into atomic P. Red phosphorus is polymeric in structure. (wikipedia.org)
  • form
  • Some evidence hints that excessive consumption of phosphorus in the form of soft drinks might increase kidney stone risk, but study results are contradictory, and if there is an effect it appears to be small. (empowher.com)
  • In this show, Phosphorus Rex's human identity is Milo Match who is Tobias Whale's lawyer who can assume a fiery form. (wikipedia.org)