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Abstract  

N,N-dimethylhydroxylamine (DMHA) is a novel salt-free reducing reagent used in the separation U from Pu and Np in the reprocessing of power spent fuel. This paper reports on the radiolysis of aqueous DMHA solution and its radiolytic liquid organics. Results show that the main organics in irradiated DMHA solution are N-methyl hydroxylamine, formaldehyde and formic acid. The analysis of DMHA and N-methyl hydroxylamine were performed by gas chromatography, and that of formaldehyde was performed by ultraviolet–visible spectrophotometry. The analysis of formic acid was performed by ion chromatography. For 0.1–0.5 mol L−1 DMHA irradiated to 5–25 kGy, the residual DMHA concentration is (0.07–0.47) mol L−1, the degradation rate of DMHA at 25 kGy is 10.1–30.1%. The concentrations of N-methylhydroxylamine, formaldehyde and formic acid are (8.25–19.36) × 10−3, (4.20–36.36) × 10−3 and (1.35–10.9) × 10−4 mol L−1, respectively. The residual DMHA concentration decreases with the increasing dose. The concentrations of N-methylhydroxylamine and formaldehyde increase with the dose and initial DMHA concentration, and that of formic acid increases with the dose, but the relationship between the concentration of formic acid and initial DMHA concentration is not obvious.

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Acta Alimentaria
Authors: A. Pérez-López, P. Navarro, A. Soler, and A. Carbonell-Barrachina

Baker, B.P., Benbrook, C.M., Groth III, E. & Benbrook, K.L. (2002): Pesticide residues in conventional, integrated pest management (IPM)-grown and organic foods: insights from three US data sets. Fd Add. Contam. , 19 , 427

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Bordás, B., Bélai, I. and Kőmives, T. (2011): Theoretical molecular descriptors relevant to the uptake of persistent organic pollutants from soil by zucchini. A QSAR study. J. Agric. Food Chem. 59, 2863

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Acta Alimentaria
Authors: V. Szente, O. Szigeti, Zs. Polereczki, Á. Varga, and Z. Szakály

and fatty acid composition in organic and conventional Italian dairy products. Food Chem. , 82 , 625–631. Marzillo G. Fat-soluble vitamin contents and fatty acid composition in

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Anderson, D., Saggar, S., Bettany, J., Stewart, J. (1981): Particle size fractions and their use in studies of soil organic matter: I. The nature and distribution of forms of carbon, nitrogen, and sulfur. Soil

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-dried and air dried marionberry, strawberry and corn using conventional, organic and sustainable agricultural practices. J. Agric. Food Chem. 52 :1237–1241. Mitchell A.E. Comparison

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Anon (1994): First National Legislation on Organic Agriculture, Official Gazette of the Turkish Ministry of Agriculture and Rural Affairs, December 18. Arozarena, I., Casp, A., Remedios

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Journal of Thermal Analysis and Calorimetry
Authors: V. A. Logvinenko, M. P. Yutkin, M. S. Zavakhina, and V. P. Fedin

[ 1 – 3 ]. Metal–organic coordination polymer frameworks (MOFs) are a relatively new matrix type; their “empty” structures can remain after guest molecule removal. MOFs are crystalline compounds consisting of metal ions coordinated by bridging

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]. Besides the variation of the thermal behavior as monitoring the composting process and correlate with changes in organic composition, techniques such as GC–MS are possible to identify compounds originated during the maturation of bagasse and evaluating its

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Introduction Organic systems are found suitable than metallic systems due to low transformation temperature, transparency, wider choice of materials, and minimized convection effects. These are the special features which have

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