• Soil
  • They inhabit sections of plant roots called nodules and directly capture nitrogen from the tiny pockets of air that exist in healthy, aerated soil. (independent.com)
  • These can be used directly as mulch or composted, whereupon a cadre of other microbes convert the stockpiled nitrogen to make a nutrient-rich soil amendment. (independent.com)
  • How do plants that do not form nitrogen-fixing associations take up nitrogen from the soil? (furman.edu)
  • Compared to other dating techniques, Nitrogen dating can be unreliable because leaching from bone is dependent on temperature, soil pH, ground water, and the presence of microorganism that digest nitrogen rich elements, like collagen. (wikipedia.org)
  • hydrogen
  • Solid nitrogen was first made in 1884, by first liquefying hydrogen with evaporating liquid nitrogen, and then allowing the liquid hydrogen to freeze the nitrogen. (wikipedia.org)
  • Solid nitrogen is slightly soluble in liquid hydrogen. (wikipedia.org)
  • It oxidizes hydrogen chloride to chlorine: 2 NF3 + 6 HCl → 6 HF + N2 + 3 Cl2 It converts to tetrafluorohydrazine upon contact with metals, but only at high temperatures: 2 NF3 + Cu → N2F4 + CuF2 NF3 reacts with fluorine and antimony pentafluoride to give the tetrafluoroammonium salt: NF3 + F2 + SbF5 → NF+ 4SbF− 6 Nitrogen trifluoride is used in the plasma etching of silicon wafers. (wikipedia.org)
  • Nitrogen trifluoride is also used in hydrogen fluoride and deuterium fluoride lasers, which are types of chemical lasers. (wikipedia.org)
  • Nitrogen clathrate has been studied as a route to achieving a low pressure hydrogen clathrate for hydrogen storage. (wikipedia.org)
  • decomposition
  • In this case study, you are asked to make qualitative observations about the effect of temperature on the decomposition of nitrogen pentoxide. (shodor.org)
  • The decomposition of NI3 proceeds as follows to give nitrogen gas and iodine: 2 NI3 (s) → N2 (g) + 3 I2 (g) (−290 kJ/mol) However, the dry material is a contact explosive, decomposing approximately as follows: 8 NI3 · NH3 → 5 N2 + 6 NH4I + 9 I2 Consistent with this equation, these explosions leave orange-to-purple stains of iodine, which can be removed with sodium thiosulfate solution. (wikipedia.org)
  • The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. (wikipedia.org)
  • Organic nitrogen may be in the form of a living organism, humus or in the intermediate products of organic matter decomposition. (wikipedia.org)
  • Trichloride
  • Nitrogen trichloride, also known as trichloramine, is the chemical compound with the formula NCl3. (wikipedia.org)
  • Nitrogen trichloride can form in small amounts when public water supplies are disinfected with monochloramine, and in swimming pools by disinfecting chlorine reacting with urea in urine and sweat from bathers. (wikipedia.org)
  • Nitrogen trichloride, trademarked as Agene, was used to artificially bleach and age flour, but was banned in 1949: In humans Agene was found to cause severe and widespread neurological disorders leading to its banning in 1947. (wikipedia.org)
  • Nitrogen trichloride can irritate mucous membranes-it is a lachrymatory agent, but has never been used as such. (wikipedia.org)
  • trifluoride
  • Nitrogen trifluoride is the halide carrier gas, which releases fluoride ions when impacted by electrons: NF3 + e− → NF2 + F− The free fluoride ion goes on to react with xenon cations. (wikipedia.org)
  • Nitrogen trifluoride is the inorganic compound with the formula NF3. (wikipedia.org)
  • Nitrogen trifluoride is an extremely strong greenhouse gas. (wikipedia.org)
  • Nitrogen trifluoride is a rare example of a binary fluoride that can be prepared directly from the elements only at very uncommon conditions, such as electric discharge. (wikipedia.org)
  • Today nitrogen trifluoride is predominantly employed in the cleaning of the PECVD chambers in the high-volume production of liquid-crystal displays and silicon-based thin-film solar cells. (wikipedia.org)
  • Nitrogen trifluoride can be used as well with tungsten silicide, and tungsten produced by CVD. (wikipedia.org)
  • Elemental fluorine has been introduced as an environmentally friendly replacement for nitrogen trifluoride in the manufacture of flat-panel displays and thin-film solar cells. (wikipedia.org)
  • pure nitrogen
  • In an atmosphere of pure nitrogen, animals died and flames were extinguished. (wikipedia.org)
  • Where the solid is not pure nitrogen, the vapour pressure can be estimated using Raoult's law in which the pressure is reduced by the molar concentration. (wikipedia.org)
  • liquid nitrogen
  • by evaporating vapour from solid nitrogen getting down to 48 K. Solid nitrogen is normally made in a laboratory by evaporating liquid nitrogen in a vacuum. (wikipedia.org)
  • Compared to the energy needed for a cryogenic air separation plant and the energy needed to transport the liquid nitrogen from the plant to the facility, generated nitrogen consumes less energy and creates far fewer greenhouse gases. (wikipedia.org)
  • occurs
  • Give a definition for each of the following and explain where each occurs in the nitrogen cycle. (furman.edu)
  • What occurs when a plant is under nitrogen stress (too little nitrogen)? (furman.edu)
  • It occurs naturally in ice caps on Earth, and is believed to be important in the outer Solar System on moons such as Titan and Triton which have a cold nitrogen atmosphere. (wikipedia.org)
  • form
  • others require intermediate nitrogen-fixers (like fungi) to turn the nitrogen into a usable form. (harvard.edu)
  • For human bones, the assumption of about 5% nitrogen in the bone, mostly in the form of collogen, allows fairly consistent dating techniques. (wikipedia.org)
  • Nitrogen mustards (NMs) form cyclic aminium ions (aziridinium rings) by intramolecular displacement of the chloride by the amine nitrogen. (wikipedia.org)
  • Solid nitrogen is the solid form of the element nitrogen. (wikipedia.org)
  • Even at the low temperatures of solid nitrogen it is fairly volatile and can sublime to form an atmosphere, or condense back into nitrogen frost. (wikipedia.org)
  • Compared to other materials, solid nitrogen loses cohesion at low pressures and flows in the form of glaciers when amassed. (wikipedia.org)
  • When the temperature is raised to 113K the amorphous phase changes to a crystalline form, and trapped nitrogen converts some ice into a clathrate. (wikipedia.org)
  • The processes of the nitrogen cycle transform nitrogen from one form to another. (wikipedia.org)
  • Many of those processes are carried out by microbes, either in their effort to harvest energy or to accumulate nitrogen in a form needed for their growth. (wikipedia.org)
  • The diagram besides shows how these processes fit together to form the nitrogen cycle. (wikipedia.org)
  • When a plant or animal dies or an animal expels waste, the initial form of nitrogen is organic. (wikipedia.org)
  • atmosphere
  • Another way to produce it, without using applied pressure, is to first make amorphous solid water by condensing water vapour at 77 K. This absorbs nitrogen gas at a pressure of 1 atmosphere. (wikipedia.org)
  • soluble
  • A 100 pound bag of 10-10-10 contains 10 pounds of nitrogen (as well as 10 percent phosphoric acid and 10 percent soluble potash). (garden.org)
  • If the fertilizer you're using contains mostly water soluble nitrogen, apply no more than 1 pound of actual nitrogen per 1,000 square feet at one time. (garden.org)
  • nitrates
  • The name nitrogène was suggested by French chemist Jean-Antoine-Claude Chaptal in 1790, when it was found that nitrogen was present in nitric acid and nitrates. (wikipedia.org)
  • temperature
  • Solid nitrogen melts at a higher temperature with increasing ambient pressure. (wikipedia.org)
  • The disassociation pressure of nitrogen increases with increasing temperature. (wikipedia.org)
  • The operating principle of a nitrogen generator utilizing the adsorption technology is based upon the dependence of the adsorption rates featured by various gas mixture components upon pressure and temperature factors. (wikipedia.org)
  • atom
  • The instability of NI 3 and NI 3 · NH 3 can be attributed to the large steric strain caused by the three large iodine atoms being held in proximity to each other around the relatively tiny nitrogen atom. (wikipedia.org)
  • The instability of NI3 and NI3 · NH3 can be attributed to the large steric strain caused by the three large iodine atoms being held in proximity to each other around the relatively tiny nitrogen atom. (wikipedia.org)
  • Therefore
  • Therefore, to apply 10 pounds of actual nitrogen, you need to apply 1,000 pounds of the 1 percent nitrogen material, or 22 pounds of the one with 46 percent nitrogen. (garden.org)
  • As with all types of mustard gas, nitrogen mustards are powerful and persistent blister agents and the main examples (HN1, HN2, HN3, see below) are therefore classified as Schedule 1 substances within the Chemical Weapons Convention. (wikipedia.org)
  • temperatures
  • The bulk modulus of s-N2 is 2.16 GPa at 20 K, and 1.47 GPa at 44 K. At temperatures below 30 K solid nitrogen will undergo brittle failure, particularly if strain is applied quickly. (wikipedia.org)
  • fluorine
  • Some studies compare nitrogen dating results with dating results from methods like fluorine absorption dating to create more accurate estimates. (wikipedia.org)