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Biomedical subjects

H N Nigg

Publications and source records attributed to H N Nigg.

At least 37 records · Page 2Linked to original sources
PubMed1984

The development and use of a universal model to predict tree crop harvester pesticide exposure.

A simple regression model is presented for predicting the transfer of residual foliar applied pesticide to the body of a Florida citrus harvester. This model is dependent on work rate and residue concentration and agrees with an earlier model derived from similar data taken from a California study. This suggests that observed regional differences in the morbidity of harvesters in treated fields may be due to regional differences in foliar pesticide residue levels rather than regional differences in transport mechanisms of pesticide from foliage to worker. Eventual metabolite output in worker urine is also predicted.

Agricultural Workers' Diseases↗
PubMed1981

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% of the total body exposure for applicators and 76% for suppliers. At one location, suppliers exhibited a larger decrease in ChE activity than applicators. This difference appeared related to the higher mean dermal ethion exposure to suppliers. Acute symptoms of organophosphorous poisoning were not observed. The total percent/hr of the probable human dermal LD50 was very low in all cases. These data indicate a relatively low potential acute hazard to workers applying ethion with air blast equipment under the conditions of this study.

Air Pollutants↗
PubMed1981

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 malathion greater than or equal to oxydemetonmethyl greater than dialifor greater than or equal to dioxathion. Malaoxon was present in relatively constant amounts under dry, cool, clear conditions but was not detected under wet, hot, cloudy conditions.

Citrus↗