J J Johnston

Summary

Affiliation: Agricultural Research Service
Country: USA

Publications

  1. ncbi request reprint Improved method for quantifying the avicide 3-chloro-p-toluidine hydrochloride in bird tissues using a deuterated surrogate/GC/MS method
    Randal S Stahl
    National Wildlife Research Center, USDA APHIS, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 50:732-8. 2002
  2. ncbi request reprint Risk assessment of an acetaminophen baiting program for chemical control of brown tree snakes on Guam: evaluation of baits, snake residues, and potential primary and secondary hazards
    J J Johnston
    United States Department of Agriculture, Animal and Plant Health Inspection Service, National Wildlife Research Center, Fort Collins, Colorado 80521, USA
    Environ Sci Technol 36:3827-33. 2002
  3. ncbi request reprint Quantification of plasma and egg 4,4'-dinitrocarbanilide (DNC) residues for the efficient development of a nicarbazin-based contraceptive for pest waterfowl
    John J Johnston
    United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
    Pest Manag Sci 58:197-202. 2002
  4. ncbi request reprint Effect of method of delivering nicarbazin to mallards on plasma 4,4'-dinitrocarbanilide levels and reproduction
    C A Yoder
    National Wildlife Research Center, Fort Collins, CO 80521, USA
    Poult Sci 85:1442-8. 2006
  5. ncbi request reprint Determination of DiazaCon in quail feed and quail serum by ion pair reversed-phase chromatography
    J J Johnston
    USDA APHIS WS National Wildlife Research Center, Analytical Chemistry Project, Fort Collins, CO 80521, USA
    J AOAC Int 84:634-9. 2001
  6. ncbi request reprint Determination of 4,4'-dinitrocarbanilide (DNC), the active component of the antifertility agent nicarbazin, in chicken, duck, and goose plasma
    T M Primus
    Analytical Chemistry Project, U S Department of Agriculture Animal and Plant Health Inspection Service National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Denver, Colorado 80521, USA
    J Agric Food Chem 49:3589-93. 2001
  7. ncbi request reprint Determination of whole-body rotenone residues in the brown tree snake (Boiga irregularis)
    R E Mauldin
    Animal and Plant Health Inspection Service, U S Department of Agriculture, National Wildlife Research Center, Fort Collins, CO 80521 2154, USA
    J Agric Food Chem 48:2240-3. 2000
  8. ncbi request reprint Evaluation of nicarbazin as a potential waterfowl contraceptive using mallards as a model
    C A Yoder
    National Wildlife Research Center, Fort Collins, CO 80521 2154, USA
    Poult Sci 85:1275-84. 2006
  9. ncbi request reprint Stabilization of the avicide 3-chloro-p-toluidine as the beta-cyclodextrin adduct
    J C Hurley
    APHIS Wildlife Services, National Wildlife Research Center, U S Department of Agriculture, 4101 West La Porte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 47:2904-7. 1999
  10. ncbi request reprint Novel field sampling procedure for the determination of methiocarb residues in surface waters from rice fields
    T M Primus
    Analytical Chemistry Project, APHIS National Wildlife Research Center, U S Department of Agriculture, 4101 LaPorte Avenue, Ft Collins, Colorado 80521, USA
    J Agric Food Chem 49:5706-9. 2001

Detail Information

Publications35

  1. ncbi request reprint Improved method for quantifying the avicide 3-chloro-p-toluidine hydrochloride in bird tissues using a deuterated surrogate/GC/MS method
    Randal S Stahl
    National Wildlife Research Center, USDA APHIS, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 50:732-8. 2002
    ..The appearance of CPTH in the breast muscle tissue immediately after feeding was not anticipated. The potential secondary hazard posed by the targeted birds to potential scavengers and predators was also evaluated...
  2. ncbi request reprint Risk assessment of an acetaminophen baiting program for chemical control of brown tree snakes on Guam: evaluation of baits, snake residues, and potential primary and secondary hazards
    J J Johnston
    United States Department of Agriculture, Animal and Plant Health Inspection Service, National Wildlife Research Center, Fort Collins, Colorado 80521, USA
    Environ Sci Technol 36:3827-33. 2002
    ..These results indicate that the advantages of using acetaminophen to reduce brown tree snake populations on Guam outweigh the minimal risks to nontarget feral and wildlife species...
  3. ncbi request reprint Quantification of plasma and egg 4,4'-dinitrocarbanilide (DNC) residues for the efficient development of a nicarbazin-based contraceptive for pest waterfowl
    John J Johnston
    United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
    Pest Manag Sci 58:197-202. 2002
    ..This approach permits the expeditious evaluation of formulations and dosing regimes by simply monitoring blood DNC concentrations in target species...
  4. ncbi request reprint Effect of method of delivering nicarbazin to mallards on plasma 4,4'-dinitrocarbanilide levels and reproduction
    C A Yoder
    National Wildlife Research Center, Fort Collins, CO 80521, USA
    Poult Sci 85:1442-8. 2006
    ..For maximum effect in the field, NCZ should be coated onto corn. A higher concentration of NCZ is needed in pelleted feed to obtain comparable plasma DNC levels to allow for the decreased absorption of DNC...
  5. ncbi request reprint Determination of DiazaCon in quail feed and quail serum by ion pair reversed-phase chromatography
    J J Johnston
    USDA APHIS WS National Wildlife Research Center, Analytical Chemistry Project, Fort Collins, CO 80521, USA
    J AOAC Int 84:634-9. 2001
    ..1 and 91.0%, respectively. The mean recovery for sera fortified at 5 levels ranging from 35 to 2000 ppm was 84.9%. Method limits of detection were approximately 14 and 13 ppm for feed and sera, respectively...
  6. ncbi request reprint Determination of 4,4'-dinitrocarbanilide (DNC), the active component of the antifertility agent nicarbazin, in chicken, duck, and goose plasma
    T M Primus
    Analytical Chemistry Project, U S Department of Agriculture Animal and Plant Health Inspection Service National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Denver, Colorado 80521, USA
    J Agric Food Chem 49:3589-93. 2001
    ..The mean recovery of DNC in fortified chicken plasma samples was 99.7 +/- 1.9% for 0.18 and 9.1 ppm DNC, and in fortified duck and goose plasma samples was 99.5 +/- 4.9% and 101.4 +/- 4.5%, respectively, for 0.18, 9.1, and 18 ppm DNC...
  7. ncbi request reprint Determination of whole-body rotenone residues in the brown tree snake (Boiga irregularis)
    R E Mauldin
    Animal and Plant Health Inspection Service, U S Department of Agriculture, National Wildlife Research Center, Fort Collins, CO 80521 2154, USA
    J Agric Food Chem 48:2240-3. 2000
    ..5%, respectively. The linear response of rotenone standard solutions was assessed from 0. 025 to 0.25 microg mL(-)(1) (r(2) = 0.9968) and from 0.250 to 125 microg mL(-)(1) (r(2) = 0.9999). The method was simple, rugged, and reliable...
  8. ncbi request reprint Evaluation of nicarbazin as a potential waterfowl contraceptive using mallards as a model
    C A Yoder
    National Wildlife Research Center, Fort Collins, CO 80521 2154, USA
    Poult Sci 85:1275-84. 2006
    ..Further research using higher NCZ levels needs to be conducted to determine whether NCZ can inhibit reproduction in waterfowl...
  9. ncbi request reprint Stabilization of the avicide 3-chloro-p-toluidine as the beta-cyclodextrin adduct
    J C Hurley
    APHIS Wildlife Services, National Wildlife Research Center, U S Department of Agriculture, 4101 West La Porte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 47:2904-7. 1999
    ..The CPT/beta-cyclodextrin adduct increased retention of CPTH from 43 to 70% upon simulated weathering. The retention was independent of the adhesives used for attachment...
  10. ncbi request reprint Novel field sampling procedure for the determination of methiocarb residues in surface waters from rice fields
    T M Primus
    Analytical Chemistry Project, APHIS National Wildlife Research Center, U S Department of Agriculture, 4101 LaPorte Avenue, Ft Collins, Colorado 80521, USA
    J Agric Food Chem 49:5706-9. 2001
    ..Recoveries from control surface water samples fortified at 5.0, 10, 50, and 100 ng/mL methiocarb averaged 92 +/- 7%. A method limit of detection for methiocarb in rice field surface water was estimated to be 0.23 ng/mL at 223 nm...
  11. ncbi request reprint Development and testing of seven new synthetic coyote attractants
    B A Kimball
    Predation Ecology and Behavioral Applications, NWRC, BNR 163, Utah State University, Logan, Utah 84322 5295, USA
    J Agric Food Chem 48:1892-7. 2000
    ..The results indicated that the attractants elicited significantly different behavioral profiles...
  12. ncbi request reprint Microsatellite variation in red-winged blackbirds (Agelaius phoeniceus)
    C Lenney Williams
    USDA, Wildlife Services, National Wildlife Research Center, 4101 Porte Ave, Fort Collins, Colorado 80521, USA
    Biochem Genet 42:35-41. 2004
    ..009). Despite revealing low levels of population structure, the high multilocus polymorphism indicates these loci will be valuable in the genetic analysis of behavior and reproductive strategies in this species...
  13. ncbi request reprint Effectiveness of twenty, twenty-five diazacholesterol, avian gonadotropin-releasing hormone, and chicken riboflavin carrier protein for inhibiting reproduction in Coturnix quail
    C A Yoder
    National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521 2154, USA
    Poult Sci 83:234-44. 2004
    ..If registered, wildlife managers may be able to use 20,25 diazacholesterol when other methods, such as lethal control, are undesirable for reducing damage caused by specific breeding behaviors such as the building of nests...
  14. ncbi request reprint Solid phase extraction gas chromatography/electron capture detector method for the determination of organochlorine pesticides in wildlife whole blood
    S A Volz
    USDA/APHIS/WS/National Wildlife Research Center, 4101 West La Porte Avenue, Fort Collins, CO 80521, USA
    J Agric Food Chem 49:2741-5. 2001
    ..This approach is particularly useful as a nonlethal approach for monitoring pesticide contamination in small animals for which the volume of blood is limiting...
  15. ncbi request reprint Analysis of pesticide gas cartridges
    J J Johnston
    APHIS/WS/National Wildlife Research Center, U.S. Department of Agriculture, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 49:3753-6. 2001
    ..This modeling indicates that the analysis of three cartridges from each of five different lots would produce mean values for both active ingredients that are within 5% of the true mean >99% of the time...
  16. ncbi request reprint Determination of cabergoline by electrospray ionization tandem mass spectrometry: picogram detection via column focusing sample introduction
    B A Kimball
    USDA APHIS NWRC, Fort Collins, Colorado 80521, USA
    Anal Chem 73:4972-6. 2001
    ..Using this technique and a modification of a previously reported extraction procedure, cabergoline could be determined in coyote plasma at concentrations as low as 9 pg of cabergoline/mL of plasma...
  17. ncbi request reprint Evaluation and significance of tetracycline stability in rabies vaccine baits
    J J Johnston
    APHIS WS National Wildlife Research Center, US Department of Agriculture, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
    J Wildl Dis 41:549-58. 2005
    ..This situation could contribute to low biomarker detection rates and suggests that formulation modification should be considered...
  18. ncbi request reprint Stability of the tranquilizer drug propionylpromazine hydrochloride in formulated products
    Thomas M Primus
    USDA APHIS National Wildlife Research Center, Analytical Chemistry Project, 4101 LaPorte Avenue, Ft Collins, CO 80521, USA
    Pest Manag Sci 61:605-11. 2005
    ..As PPZHCl formulations must be stable when stored at 5 to 40 degrees C for 6 to 12 months, reformulation with the anti-oxidant ascorbic acid was utilized to achieve the required PPZHCl stability...
  19. ncbi request reprint Probabilistic model for estimating field mortality of target and non-target bird populations when simultaneously exposed to avicide bait
    John J Johnston
    USDA APHIS Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
    Pest Manag Sci 61:649-59. 2005
    ....
  20. ncbi request reprint Probabilistic risk assessment for snails, slugs, and endangered honeycreepers in diphacinone rodenticide baited areas on Hawaii, USA
    John J Johnston
    US Department of Agriculture USDA Animal and Plant Health Inspection Service APHIS WS National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    Environ Toxicol Chem 24:1557-67. 2005
    ..Also, no acute toxicity was noted for snails and slugs that feed on diphacinone baits...
  21. ncbi request reprint Characterizing 3-chloro-p-toluidine hydrochloride on rough-hulled rice and ethyl-cellulose-coated rice baits using high-performance liquid chromatography
    Randal S Stahl
    National Wildlife Research Center, USDA APHIS WS, 4101 LaPorte Ave, Fort Collins, CO 80521, USA
    J Chromatogr Sci 43:367-71. 2005
    ..Increased retention time is observed for CPT HCl at the higher pH. The two methods have been useful in characterizing different bait formulations in an ongoing pesticide formulation improvement program...
  22. ncbi request reprint Determination of diphacinone residues in Hawaiian invertebrates
    Thomas Primus
    USDA APHIS WS corrected National Wildlife Research Center, 4101 LaPorte Ave, Fort Collins, Colorado 80521, USA
    J Chromatogr Sci 44:1-5. 2006
    ..Diphacinone residues in slug tissue ranges from 1.3 to 4.0 mg/kg for Deroceras laeve and < MLOD to 1.8 mg/kg for Limax maximus, respectively. The mean recoveries from slugs at 0.20 and 2.0 mg/kg are 91% +/- 15% and 86% +/- 5%...
  23. ncbi request reprint Absorption, distribution, and excretion of [14C]-3-chloro-4-methylaniline hydrochloride in two species of birds following a single oral dose
    David A Goldade
    National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 52:8074-80. 2004
    ..4 h for blackbirds. The radioactivity in blackbird kidney tissues did not change significantly for the duration of the test, pointing toward the kidney as a possible site of action for this important agricultural chemical...
  24. ncbi request reprint Development of a high performance liquid chromatography/mass spectroscopy method for the determination of strychnine concentrations in insects used to assess potential risks to insectivores
    Randal S Stahl
    US Department of Agriculture, APHIS WS, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
    J Chromatogr B Analyt Technol Biomed Life Sci 811:257-62. 2004
    ..338, 0.341, 0.698, and 0.034 microg/g were detected in ants, fly adults, fly larvae, and beetles, respectively. This information collected with the HPLC/MS method is critical for assessing potential non-target hazards for insectivores...
  25. ncbi request reprint Direct analysis of plasticizers in aqueous samples by atmospheric pressure chemical ionization-tandem mass spectrometry (APCI-MS-MS)
    Bruce A Kimball
    USDA APHIS NWRC, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    J Anal Toxicol 27:309-12. 2003
  26. ncbi request reprint Determination of anthraquinone in technical material, formulations, and lettuce by high performance liquid chromatography
    Richard E Mauldin
    Animal and Plant Health Inspection Service, National Wildlife Research Center, United States Department of Agriculture, 4101 LaPorte Avenue, Fort Collins, Colorado 80521 2154, USA
    J Agric Food Chem 50:3632-6. 2002
    ..The MLODs for the same three lettuce tissues were 0.055, 0.058, and 0.077 microg g(-)(1), respectively. These methods were used to quantify AQ residues from field-grown, treated lettuce and associated fortified quality control samples...
  27. ncbi request reprint High-performance liquid chromatography-based determination of nicarbazin excretion in waterfowl
    Randal S Stahl
    National Wildlife Research Center, USDA APHIS, 4101 La Porte Avenue, Fort Collins, CO 99801 USA
    J Chromatogr B Analyt Technol Biomed Life Sci 775:103-8. 2002
    ..5 microg fortified samples (n=3) had mean recoveries of 91, 94 and 97% and intra-day (n=3) recoveries at the same fortification levels of 103, 94, and 92%. The method has been used successfully in excretion studies of nicarbazin in ducks...
  28. ncbi request reprint Poly(methyl methacrylate) synthetic grit formulations sustain the delivery of nicarbazin, a contraceptive agent, in pest waterfowl
    Jerome C Hurley
    USDA, APHIS, Wildlife Services, National Wildlife Research Center, 4101 La Porte Avenue, Fort Collins, CO 80521, USA
    J Control Release 85:135-43. 2002
    ..95 days. Control grit had a half life of 12.7 days based on weight loss. Analysis of blood and feces for monitoring release from the grit and approximate indirect plasma levels of the active ingredient proved feasible...
  29. ncbi request reprint Desmosterol: a biomarker for the efficient development of 20,25-diazacholesterol as a contraceptive for pest wildlife
    John J Johnston
    United States Department of Agriculture, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 51:140-5. 2003
    ..The elevation of blood desmosterol levels is being used as an indicator of 20,25-diazacholesterol absorption and to facilitate the development of a 20,25-diazacholesterol-based contraceptive for pest wildlife...
  30. ncbi request reprint Determination of 4,4'-dinitrocarbanilide (DNC), a component of Nicarbazin, in Canada goose (Branta canadensis) eggshells using high-performance liquid chromatography
    Randal S Stahl
    USDA APHIS WS National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 51:1130-5. 2003
    ..DNC levels in the eggshells were highly correlated with feed dose...
  31. ncbi request reprint 4,4'-Dinitrocarbanilide (DNC) concentrations in egg shells as a predictor of nicarbazin consumption and DNC dose in goose eggs
    Randal S Stahl
    National Wildlife Research Center, 4101 LaPorte Ave, Ft Collins, CO 80521, USA
    Pest Manag Sci 59:1052-6. 2003
    ..Our method allows for the estimation of nicarbazin consumption and DNC dose in eggs under field conditions, which is important in developing an effective infertility agent for over-abundant non-migratory goose populations...
  32. ncbi request reprint Liquid chromatographic determination of 4,4'-dinitrocarbanilide, the active component of the infertility agent nicarbazin, in chicken, duck, goose, and snake eggs
    Thomas M Primus
    US Department of Agriculture, Animal and Plant Health Inspection Service, National Wildlife Research Center, 4101 LaPorte Ave, Ft Collins, Denver, CO 80521, USA
    J AOAC Int 86:1144-8. 2003
    ..015 to 0.035 microg/g. The reported method is much simpler than and equally efficient as previous methods developed for the determination of DNC residues in egg contents...
  33. ncbi request reprint Response factor considerations for the quantitative analysis of western redcedar (Thuja plicata) foliar monoterpenes
    Bruce A Kimball
    USDA WS National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
    J Chromatogr Sci 43:253-8. 2005
    ..Carvone recovery is approximately 80% with excellent precision (< 4%). The method limits of detection obtained from 2-carene and carvone fortified samples are 4.7 and 13.5 microg/g, respectively...
  34. ncbi request reprint Evaluation of cocoa- and coffee-derived methylxanthines as toxicants for the control of pest coyotes
    John J Johnston
    USDA APHIS Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
    J Agric Food Chem 53:4069-75. 2005
    ..These results indicate that mixtures of theobromine and caffeine have the potential to be developed into a selective, effective, and socially acceptable toxicant for the control of pest coyotes...
  35. ncbi request reprint Chromatographic analysis of sagebrush monoterpenes in blood plasma
    Bruce A Kimball
    US Department of Agriculture APHIS NWRC, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
    J Chromatogr Sci 42:245-9. 2004
    ..Some analyte loss is observed from plasma samples stored for five weeks at -12 degrees C. However, storage of extracts on the SPE columns affords excellent stability...