What's the difference between nitre and saltpetre?

Nitre


Definition:

  • (n.) A white crystalline semitransparent salt; potassium nitrate; saltpeter. See Saltpeter.
  • (n.) Native sodium carbonate; natron.
  • (n.) See Niter.

Example Sentences:

  • (1) The fast activation rates obtained by the photorelease of Ca2+ from nitr-5 are similar to those obtained with skinned skeletal fibres of actin-regulated muscle.
  • (2) The "caged" calcium chelator Nitr-5 was incorporated into isolated rat ventricular myocytes.
  • (3) First, nitr-5, a photolabile nitrobenzhydrol tetracarboxylate calcium chelator, which releases calcium in response to ultraviolet light, was used.
  • (4) This paper introduces nitr-2, a new Ca2+ chelator designed to release Ca2+ upon illumination with near UV (300-400 nm) light.
  • (5) Laser-induced photolysis of the caged calcium molecule, nitr-5, was used to generate a rapid jump in free Ca2+ (within 1 ms) at the site of the sarcoplasmic reticulum, thus overcoming delays due to Ca2+ diffusion from the bathing solution.
  • (6) Nitr-5 or the related compounds nitr-2 and nitr-7, complexed with Ca2+, were introduced into rat sympathetic ganglion cells by dialysis from a patch pipette electrode operating in the whole-cell, voltage-clamp mode.
  • (7) A quantitative estimate of the spatial distribution of intracellular [Ca2+] changes in large cells filled with a high concentration of nitr-2 and exposed to an intense UV flash is offered.
  • (8) The fluorescence properties of the calcium indicators Fura-2 and Fluo-3 have been investigated in the presence of the 'caged calcium' photolabile chelators Nitr-5 and DM-nitrophen.
  • (9) To overcome diffusion delays, rapid increases in the concentrations of Ca2+ and Ins(1,4,5)P3 were produced by laser photolysis of "caged Ca2+" (Nitr-5) and "caged Ins(1,4,5)P3".
  • (10) The method consisted of equilibrating a myofibrillar bundle (100 micrograms diameter) in a solution containing 0.1 mM-nitr-5 (initial pCa 6.8-6.6) and then exposing it to a UV laser pulse.
  • (11) By increasing the laser pulse energy or the initial Ca2+ loading of the nitr-5, the post-photolysis pCa was varied from 6.7 to 6.0; the CICR response increased in size over this pCa range.
  • (12) In intact muscles loaded with the photolabile Ca2+ chelator, nitr-5, photo-activated release of Ca2+ during the slow wave cycle produced changes consistent with activation of Ca2(+)-dependent outward currents.
  • (13) Nitr-5 was loaded into the hair cell by incubation with the membrane-permeable form of the compound (nitr-5 AM).
  • (14) Fluo-3 can also be microinjected into fibroblasts along with photolabile compounds such as nitr-5 and caged inositol trisphosphate for photorelease experiments.
  • (15) Although IM is not primarily Ca2+ dependent, small increases in [Ca2+]i by photolysis of the "caged" Ca2+ chelator nitr-5 or by evoking action potentials augmented, while larger increases inhibited, IM.
  • (16) Each flash-evoked current rose rapidly to a peak and decayed to half in 3-12 s. Our model mimicked this behavior when it included diffusion of calcium and nitr perpendicular to the surface of the neuron facing the flashlamp.
  • (17) To delineate the roles of presynaptic potential and calcium entry in transmitter release, we have used nitr-5, a photolabile calcium chelator, and a voltage-clamp technique to control intracellular calcium and membrane potential independently at a synapse formed between cell bodies of cultured neurons of the fresh water snail Helisoma trivolvis.
  • (18) In contrast, Ca2+ photorelease from nitr-5 had a biphasic effect: a small, rapid inactivation of the Ca2+ current was followed by a slow potentiation.
  • (19) We have studied calcium-activated potassium current, IK(Ca), and calcium-activated nonspecific cation current, INS(Ca), in Aplysia bursting pacemaker neurons, using photolysis of a calcium chelator (nitr-5 or nitr-7) to release "caged calcium" intracellularly.
  • (20) Light-induced Ca2+ release from the Ca2+ complex of Nitr-5 altered the FTIR spectra of sarcoplasmic reticulum vesicles and purified Ca(2+)-ATPase preparations.

Saltpetre


Definition:

  • (n.) Potassium nitrate; niter; a white crystalline substance, KNO3, having a cooling saline taste, obtained by leaching from certain soils in which it is produced by the process of nitrification (see Nitrification, 2). It is a strong oxidizer, is the chief constituent of gunpowder, and is also used as an antiseptic in curing meat, and in medicine as a diuretic, diaphoretic, and refrigerant.

Example Sentences:

  • (1) Buy as little as possible – even 50g will be enough for several fully grown pigs – and weigh it carefully, as saltpetre is toxic in high doses.
  • (2) Obviously, the change from vegetable dyes to saltpetre for the coloring or color preservation, respectively, of meat occurred between 1600 and 1750, probably near 1700.
  • (3) For each kilo of meat, you'll need 30g salt, 10-30g sugar (depending how sweet you like your bacon), up to 10g of whatever dried herbs and spices you fancy – much more if you're using fresh – and just 0.25g to 1g of saltpetre, AKA potassium nitrate or KN03.
  • (4) Its features are comparable but not quite identical with those of Christensen's saltpetre-induced PXE which the author considers to be an exogenous variety of pseudoxanthoma elasticum.
  • (5) In order to settle the question of when saltpetre (nitrate) came in use as an additive to human food, a number of historic cookery books from Germany and Austria were reviewed.
  • (6) He pioneered new technologies – one of which bears his name – to produce saltpetre by oxidising nitrogen from air, and made industrial quantities of hydrogen by water electrolysis.

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