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  1. No Access

    Article

    Ecdysone metabolism: Ecdysone dehydrogenase-isomerase

    An enzyme system that converts α-ecdysone to its hormonally less active 3α-epimer was detected only in the midgut of the tobacco hornworm,Manduca sexta (L.). This system appears to be specific for the ecdysones a...

    H. N. Nigg, J. A. Svoboda, M. J. Thompson, J. N. Kaplanis, S. R. Dutky… in Lipids (1974)

  2. No Access

    Article

    Ecdysone 20-hydroxylase from the midgut of the tobacco hornworm (Manduca sexta L.)

    An ecdysone 20-hydroxylase enzyme system that converts α-ecdysone to 20-hydroxyecdysone was prepared from the midgut of the tobacco hornworm prepupa. This partially purified enzyme is NADPH dependent and is lo...

    H. N. Nigg, J. A. Svoboda, M. J. Thompson, S. R. Dutky, J. N. Kaplanis… in Experientia (1976)

  3. No Access

    Article

    Dislodgeable residues of ethion in Florida citrus and relationships to weather variables

    Five different treatments of ethion on Valencia orange trees were compared for decay rates and for ethion monoxon and ethion dioxon production under different environmental conditions. The oxon metabolite leve...

    H. N. Nigg, J. C. Allen, R. F. Brooks… in Archives of Environmental Contamination an… (1977)

  4. No Access

    Article

    Dislodgeable residues of parathion and carbophenothion in florida citrus: A weather model

    H. N. Nigg, J. C. Allen, R. W. King… in Bulletin of Environmental Contamination an… (1978)

  5. No Access

    Article

    Weather-dependent residue behavior of malathion in florida citrus varieties1

    H. N. Nigg, James A. Reinert… in Bulletin of Environmental Contamination an… (1979)

  6. No Access

    Article

    Disappearance of acephate, methamidophos, and malathion from citrus foliage

    H. N. Nigg, J. A. Reinert, J. H. Stamper… in Bulletin of Environmental Contamination an… (1981)

  7. No Access

    Article

    Comparative disappearance of dioxathion, malathion, oxydemetonmethyl and dialifor from Florida citrus leaf and fruit surfaces

    Surface residue disappearance rates of dioxathion, malathion, oxydemetonmethyl, and dialifor were the same for fruit and leaves, and they increase with temperature. Disappearance rates were in the order of mal...

    H. N. Nigg, J. H. Stamper in Archives of Environmental Contamination and Toxicology (1981)

  8. No Access

    Article

    Worker exposure to ethion in florida citrus

    Dermal and respiratory exposure to ethion was determined for 17 men in eight spray crews in Florida citrus spray operations. Respiratory exposure was less than 1% of the total exposure. Hands represented 42% o...

    G. A. Wojeck, H. N. Nigg, J. H. Stamper… in Archives of Environmental Contamination an… (1981)

  9. No Access

    Article

    Worker exposure to arsenic in Florida grapefruit spray operations

    Dermal and respiratory exposures of workers to arsenic when mixing, loading, and applying lead arsenate as a maturity spray to Florida grapefruit were determined. Respiratory exposure contributed <0.01% of tot...

    G. A. Wojeck, H. N. Nigg, R. S. Braman… in Archives of Environmental Contamination an… (1982)

  10. No Access

    Article

    Worker exposure to paraquat and diquat

    Exposure of workers applying paraquat to fields of tomatoes and citrus, and diquat to waterways containing water hyacinths and hydrilla, was monitored with dermal α-cellulose pads attached at each of ten body ...

    G. A. Wojeck, J. F. Price, H. N. Nigg… in Archives of Environmental Contamination an… (1983)

  11. No Access

    Chapter and Conference Paper

    Regional behavior of pesticide residues in the United States

    Originally we became interested in the regional behavior of pesticides through our work on pesticide residue persistence and worker reentry into pesticide- treated crops. The regionality of worker reentry inci...

    H. N. Nigg, J. A. Henry, J. H. Stamper in Residue Reviews (1983)

  12. No Access

    Article

    Dislodgeable residues of carbophenothion in Florida citrus: Implications for safe worker reentry

    G. C. de Batista, J. H. Stamper, H. N. Nigg… in Bulletin of Environmental Contamination an… (1985)

  13. No Access

    Article

    Isolation and partial characterization of phytotoxic compounds from lantana (Lantana camara L.)

    Phytotoxic compounds obtained from methanol extracts of field-grown lantana (Lantana camara L.) were quantified in terms of their inhibition of ryegrass (Lolium multiflorum Lam.) seed germination and/or seedling ...

    N. R. Achhireddy, M. Singh, L. L. Achhireddy, H. N. Nigg… in Journal of Chemical Ecology (1985)

  14. No Access

    Article

    Dicofol exposure to Florida citrus applicators: Effects of protective clothing

    Mixer-loaders and applicators of the pesticide dicofol in Florida citrus groves were monitored for exposure. Alpha-cellulose pads were placed inside and outside regular work clothing. When protective suits wer...

    H. N. Nigg, J. H. Stamper, R. M. Queen in Archives of Environmental Contamination an… (1986)

  15. No Access

    Article

    Prediction of pesticide dermal exposure and urinary metabolite level of tree crop harvesters from field residues

    J. H. Stamper, H. N. Nigg, R. M. Queen in Bulletin of Environmental Contamination an… (1986)

  16. No Access

    Article

    Diflubenzuron surface residues in florida citrus

    H. N. Nigg, R. D. Cannizzaro, J. H. Stamper in Bulletin of Environmental Contamination an… (1986)

  17. No Access

    Article

    Rapid estimation of 4,4′-dichlorobenzilic acid in human urine after dicofol exposure

    S. N. Deshmukh, H. N. Nigg, J. H. Stamper… in Bulletin of Environmental Contamination an… (1987)

  18. No Access

    Article

    Ethion distribution in Florida Valencia oranges

    H. N. Nigg, J. H. Stamper, R. M. Queen… in Bulletin of Environmental Contamination an… (1988)

  19. No Access

    Article

    Diflubenzuron application to citrus and its impact on invertebrates in an adjacent pond

    A. Ali, H. N. Nigg, J. H. Stamper… in Bulletin of Environmental Contamination an… (1988)

  20. No Access

    Article

    Pesticide exposure to a greenhouse drencher

    J. H. Stamper, H. N. Nigg, W. D. Mahon… in Bulletin of Environmental Contamination an… (1989)

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