N analysis

The continuous monitoring of liquid lithium for O, C, H and H uses electrochemical cells based on Tho2-Y203 electrolytes and diffusion meters. No continuous method for N analysis is yet available . ... 

Abbreviations for the solvents used are as follows C = Chloroform, E = Ethanol Elemental (C,H,N) analysis indicated that the calculated and observed values were within the acceptable limits ( 0.4%)... 

Figure 3.1 Absolute Errors in N Analysis by a Micro Kjeldahl s Method.

A method for rapid organic C and N analysis in natural particulate materials consists of eliminating carbonates with HC1 solution and determining these elements in an automatic analyzer7. 

WojciK, C. and DeMartino, G. N. Analysis of Drosophila 26 S proteasome using RNA interference. J Biol Chem 2002, 277, 6188-97. 

TABLE n. Analysis of City Water Supplies Utilizing Ion Chromatography... 

FIG. 5.9 Phase angles in an acentric X-N analysis phase angle as calculated with spherical-atom form factors and neutron positional and thermal parameters tpx is the unknown phase of the X-ray structure factors which must be estimated for the calculation of the vector AF. Use of FX — FN introduces a large phase error. Source Coppens (1974). 

A French patent claims l,2,4-oxadiazetidin-4-one is effective in the treatment of psoriasis (76FRP2341309). The reaction of nitrosobenzenes and arylmethyleneimines was reported to give 1,3-diaryl-1,2,4-oxadiazetidines with only C,H,N analysis to support their formation. They also supposedly decompose to diarylcarbodiimides with loss of water, which mechanistically is hard to envision (24JCS87). 

A flask containing 3.6 gm (0.02 mole) of o-aminodiphenylmethane in 8 ml of concentrated hydrochloric acid and 80 ml of water is cooled to 0°C to —10°C while a solution of 1.4 gm (0.02 mole) of sodium nitrite in 10 ml of water is slowly added. After 15 min, 1.5 gm (0.023 mole) of sodium azide in 10 ml of water is added dropwise. The resulting solution is extracted twice with 100 ml portions of ether, washed with 5 % sodium hydroxide, and dried over sodium sulfate. The ether is removed under reduced pressure and the residue chromatographed on alumina. The azide is eluted with petroleum ether (b.p. 60°-90°C) to afford, after concentration, 3.8 gm (92 %) of o-azidodiphenylmethane giving satisfactory C, H, and N analysis. 

Ullah, I., Wiley, G. J., and Agharkar, S. N. Analysis and simulation of capsule dissolution problem encountered during product scale-up. Drug. Dev. Ind. Pharm. 18(8) 895-910, 1992. 

The physical properties (C, H, and N analysis, melting point, solubility, etc.) of Dexedrine and Benzedrine were identical. The recommended oral dosage of Dexedrine (which is still available) was 5 mg/day, but the recommended dosage of Benzedrine (no longer available) was twice that. Apparently it required considerably more Benzedrine than Dexedrine to yield the same physiological response. Explain this apparent contradiction. 

Levy, N. Analysis of an epoxy resin curing reaction by differential scanning calorimetry, in Computer Applications in Applied Polymer Science, p. 313, ACS Symp. Ser. 197, Washington D.C., Amer. Chem. Soc. 1975... 

The rates of solvolyses of l-(2-substituted 4-thiazolyl) ethyl chlorides (44) do not, however, correlate with crm.326 There is nevertheless a correlation with reactivities for 6-substituted 2-pyridyl68 systems, which also contain the reaction site and substituents flanking the N. Analysis of the results in terms of the multiparameter Eqs. (1) and (3) reveals the predominance of resonance effects. The same conclusions apply to the... 

M. Realff, A n Analysis of the Chemical hatch Production Problem and a Detailed Methodologyfor Scheduling, technical report no. LISPE-88-054, Laboratory for Intelligent Systems in Process Engineering, MIT, Cambridge, Mass., 1989. 

To gain an insight into the composition of the reaction products, a C, H, 0, N analysis was performed by Galbraith Laboratories, Tennessee on samples prepared by lyophilization the results are displayed in Table 1. 

Hovanov N., Analysis and Synthesis of Parameters under Information Deficiency. St. Petersburg, St. Petersburg State University Press, 1996 (Monograph, in Russian)... 

Adams, D. F., Koppe, R. K., Tuttle, W. N. Analysis of kraft-mill sulphur containing gases with gas-liquid chromatographic ionisation detectors. J. Air Pollution Control Assoc. 15, 31 (1965). — Gas Chromatog. Abstr. 1965, 892. 

Spears, L. G., Hackerman, N. Analysis of fluorine, hydrogen fluoride, nitrogen trifluoride, trans dinitrogen difluoride and dinitrogen tetrafluoride mixture by gas chromatography. J. Gas Chromatog. 6, 392 (1968). 

Mian, N., Analysis of cell-growth-phase-related variations in hyaluronate synthase activity of isolated plasma-membrane fractions of cultured human skin fibroblasts, Biochem. J., 237, 333, 1986. 

Hermann, B. Seiber, J.N. Analysis of atmospheric residues from applications of DEF and Folex cotton defoliants. Presented at the 177th National Meeting of the American Chemical Society (PEST 010), Washington, D.C. Sept. 9-14,... 

Wieczorek, A. and Kosaric, N., Analysis of ethanol production from Jerusalem artichoke in a farm-scale operation, in Energy from Biomass and Wastes VIII, Proceedings of Symposium, Institute of Gas and Technology, Lake Buena Vista, FL, 1984, pp. 1113-1130. 

Peppas, N., Analysis of Fickian and non-Fickian drug release from polymers, Pharmaceutica Acta Helvetiae, Vol. 60, No. 4, 1985, pp. 110-111. 

Duffull, S., Kirkpatrick, C., Green, B., and Holford, N., Analysis of population pharmacokinetic data using NONMEM and WinBUGS, Journal of Biopharmaceutical Statistics, Vol. 15, No. 1, 2005, pp. 53-73. 

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