Raymond E Grissom

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During the last several years, illegal commercial application of methyl parathion (MP) in domestic settings in several U.S. Southeastern and Midwestern States has affected largely inner-city residents. As part of a multiagency response involving the U.S. Environmental Protection Agency (U.S. EPA), the Agency for Toxic Substances and Disease Registry(More)
In vivo and in vitro penetration of fenvalerate were compared in the 3-d-old fifth-instar tobacco budworm, Heliothis virescens (F). In the in vitro studies, a piece of cuticle was excised and mounted on a diffusion cell, and the amount of radioactivity present in the cuticle and medium was determined at various time intervals. At 24 h, approximately 7.4% of(More)
Pigeon squabs in two separate experiments were surgically bursectomized ( BSX ), surgically sham bursectomized ( SBSX ), or maintained as non-surgical controls (CON). Surgical procedures were performed within 2 hr of hatching. Primary and secondary hemagglutinin (HA) responses, as well as mercaptoethanol sensitive (ME-S) and resistant (ME-R) levels, to(More)
Four-week-old male chickens were subjected to one of the following treatments: 0 ppm mercury (Hg) plus water ad libitum, 0 ppm Hg plus limited water (LW), 500 ppm Hg plus water ad libitum, and 500 ppm Hg plus LW. Exposure was for each of the following time intervals: 0-3, 0-6, 0-9, 0-12, and 0-15 d. LW significantly increased red blood cell (RBC) numbers,(More)
A method is described for preparing mouse skin for assessment of in vitro penetration of dermally applied compounds. Separation of the epidermis from the dermis was attempted using a dermatome, heat, trypsin and collagenase. When mouse skin was incubated in a collagenase solution and separated using water, the hypodermis and part of the dermis were(More)
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