CO2 efflux and microbial activities in undisturbed soil columns in different nitrogen management von Molnár, E., Szili-Kovács, T., Villányi, I., Knáb, M., Bálint, Á., Kristóf, K., Heltai, G.

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EFFECT OF N FERTILIZER FORMS AND SOIL MOISTURE LEVELS ON THE N GASEOUS LOSSES von NOTAS, E, Molnar, E, Ruzsa, D, CSOMA, Z, DEBRECZENI, K, Heltai, G Y

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Application of sequential extraction with supercritical CO2, subcritical H2O, and an H2O/CO2 mixture for estimation of environmentally mobile heavy metal fractions in sediments von Heltai, G., Fehér, B., Percsich, K., Barabás, B., Fekete, I.

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Modelling of environmental impact of different N-sources in soil/atmosphere system von Bálint, Á., Heltai, Gy, Nótás, E., Tarr, Zs, Jung, K.

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Estimation of ecotoxicological potential of contaminated sediments based on a sequential extraction procedure with supercritical CO2 and subcritical H2O solvents von Heltai, György, Percsich, Kálmán, Halász, Gábor, Jung, Klaus, Fekete, Ilona

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15N-Tracer Technique with the MIP-OES Detection of Stable N-Isotopes for Soil Ecological Studies von Heltai, G., Jozsa, T.

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Coupling of microwave induced plasma optical emission spectrometry with HPLC separation for speciation analysis of Cr(III)/Cr(VI) von Heltai, G., Fehér, B., Horváth, M.

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Application of MIP-AES as element specific detector for speciation analysis von HELTAI, G, JOZSA, T, PERCSICH, K, FEKETE, I, TARR, Z

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Gel-electrophoresis and subsequent optical emission (15)n analysis to identify (15)n-labelled protein fractions von Bálint, A, Heltai, G, Jung, K, Nótás, E

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Application of sequential extraction with supercritical CO(2), subcritical H(2)O, and an H(2)O/CO(2) mixture for estimation of environmentally mobile heavy metal fractions in sedim... von Heltai, G, Fehér, B, Percsich, K, Barabás, B, Fekete, I

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Speciation of waste water sediments von Heltai, Gy, Percsich, K, Fekete, I, Barabás, B, Józsa, T

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Moderated pressure microwave digestion system for preparation of biological samples von Heltai, György, Percsich, Kálmán

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Changes in the Social Structure of the East Central European Countries von HELTAI, GEORGE G.

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Environmental Evaluation of a Local Lake Chain Affected by Wastewater by Means of Spectrochemical Analytical Methods von Heltai, Gy, Fekete, I., Gémesi, Z., Percsich, K., Flórián, K., Tarr, Zs

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A possibility of element specific detection in HPLC by means of MIP-AES coupled with hydraulic high pressure nebulization von HELTAI, G, JOZSA, T, PERCSICH, K

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Soil analysis and nutrition capacity von Heltai, Gy, Füleky, Gy

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Study of a toroidal argon and a cylindrical helium microwave induced plasma for analytical atomic emission spectrometry-I. Configurations and spectroscopic properties von Heltai, Gy, Broekaert, J.A.C., Leis, F., Tölg, G.

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Study of a toroidal argon MIP and a cylindrical helium MIP for atomic emission spectrometry. II: Combination with graphite furnace vaporization and use for analysis of biologica sa... von HELTAI, G, BROEKAERT, J. A. C, BURBA, J, LEIS, F

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The influence of photographic and photometric factors in spectrography on the shape of the blackening curve von Heltai, Gy, Zimmer, K.

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Effect of properties of microdensitometers on the shape of the characteristic curve of the photographic emulsion von Zimmer, K., Heltai, Gy

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