Tri-2-propyl phosphate (T2PP) reacts with lanthanide nitrates to form two series of solid complexes, Ln(N03)3”3T2PP and Ln’(N03)3.2T2PP.H20,where Ln includes all lanthanides and Ln’ only Tb through Lu. These complexes were characterized by elemental analyses. X-ray diffraction patterns showed a single structure for each series, and infrared spectra showed that both nitrate and T2PP ligands were...

Peroxyacetyl nitrate (PAN) vapor was photolyzedat 248 nmandthe N03 photoproduct wasdetected bylaser induced fluorescence. Thequantum yield fortheproduction of N03 was determined by comparison to N 205 photolysis data taken under identical experimental conditions. Contributions to the observed laser induced fluorescence were found to arise from excited state photoproducts such as N02* . The exci...

Sputtering of condensed-phase ammoniumnitrate yields an extensivedistribution of negative cluster ions of the form [(NH4N03),N03]-, n 2 3. Collision-induced dissociation of mass-selected cluster ions suggests that the first two members of the series, n = 1 and n = 2, are missing because the ions rearrange to lose one or more ammonia molecules. Gradient-corrected density-functional calculations ...

Structural phase transition in AgN03 at high temperature is simulated by molecular dynamics. The simulations are based on the potentials calculated from the Gordon-Kim modified electron-gas formalism extended to molecular ionic crystals. AgN03 transforms into rhombohedral structure at high temperature and the phase transition is associated with the rotations of the N03 ions and displacements of...

Effects of additional nitrate (20 mol m·3 NO;) on growth of barley (Hordeum vulgare L. cv. Triumph), oat (Avena sativa L. cv. Amuri), rye (Secale cereale L. cv. Rapaki), triticale (x Triticosecale Wittm. cv. Aranui) and wheat (Triticum aestivum L. cv. Otane) prior to emergence from a sowing depth of 70 mm were examined under controlled environment. conditions. For all five cereals, additional N...

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Simple and reliable procedures have been developed for analyses of N03 , total N, and organic N in fresh waters. N03is determined by second-derivative UV spectroscopy. Total N and organic N are determined based on secondderivative analyses of N03following persulfate digestion. Resolution of organic N determinations was increased by using ion-exchange resins to remove N03from samples with high c...

Effects of inorganic nitrogen (N03) enrichment on phytoplankton were studied using a factorial design experiment. Using species assemblages from Lake Huron waters, the effects of NO] and total phosphorus (TSP) additions on species abundance and composition were monitored. The speciesnutrient relationship was determined by canonical correspondence analysis (CCA). In addition, divisional differen...

to study the spatial and temporal variation of nitrate pollution in groundwater in the vicinity of zayandehrud river in isfahan province monthly water samples were collected from 100 wells in the study area. the average n03-n concentration ranged from 1.2 to 25.7 mg/l (5.4 to 115.6 mg/i as no3) and average n03-n concentration in groundwater was 9.6 mg/i, which is lower than the standard limit (...

Determination of total nitrogen in aqueous samples after potassium persulfate digestion compared favorably in both precision and nitrogen recovery with determinations obtained using Kjeldahl digestion. The determination of total nitrogen (TN = inorganic and organic fixed nitrogen) has largely depended either on acid Kjeldahl digestion ( cf. Strickland and Parsons 1972) or on photo-oxidation (Ar...