John B. French, Jr., Ph.D. (Former Employee)
Science and Products
Filter Total Items: 30
The role of thyroxine on the production of plumage in the American Kestrel (Falco sparterius) The role of thyroxine on the production of plumage in the American Kestrel (Falco sparterius)
No abstract available.
Authors
M.J. Quinn, J.B. French, F.M.A. McNabb, M. A. Ottinger
Blarina brevicauda as a biological monitor of polychlorinated biphenyls: Evaluation of hepatic cytochrome p450 induction Blarina brevicauda as a biological monitor of polychlorinated biphenyls: Evaluation of hepatic cytochrome p450 induction
We assessed the value of short-tailed shrews (Blarina brevicauda) as a possible biomonitor for polychlorinated biphenyl pollution through measurement of the induction of hepatic cytochrome P450 and associated enzyme activities. First, we checked the inducibility of four monooxygenases (benzyloxyresorufin-O-dealkylase [BROD], ethoxyresorufin-O-dealkylase [EROD], methoxyresorufin-O...
Authors
J.S. Russell, R.S. Halbrook, A. Woolf, J.B. French, M. J. Melancon
Zinc and lead poisoning in wild birds in the Tri-State Mining District (Oklahoma, Kansas, Missouri) Zinc and lead poisoning in wild birds in the Tri-State Mining District (Oklahoma, Kansas, Missouri)
contaminated with Pb, Cd, and Zn from mining, milling and smelting. Metals have been dispersed heterogeneously throughout the District in the form of milled mine waste ('chat'), as flotation tailings and from smelters as aerial deposition or slag. This study was conducted to determine if the habitat has been contaminated to the extent that the assessment populations of wild birds are...
Authors
W. N. Beyer, J. Dalgam, S. Dudding, J.B. French, R. Mateo, J. Miesner, L. Sileo, J. Spann
Establishing appropriate measures for monitoring aging in birds: comparing short and long lived species Establishing appropriate measures for monitoring aging in birds: comparing short and long lived species
In order to reveal patterns of reproductive aging in birds we focus on a short lived species, the Japanese quail and the American kestrel, which has a life span of medium length. Quail have been studied extensively in the laboratory as models for understanding avian endocrinology and behavior, and as a subject for toxicological research and testing. In the lab, Japanese quail show age...
Authors
M. A. Ottinger, E. Reed, J. Wu, N. Thompson, J.B. French
Immunological and physiological effects of chronic exposure of Peromyscus leucopus to Aroclor 1254 at a concentration similar to that found at contaminated sites Immunological and physiological effects of chronic exposure of Peromyscus leucopus to Aroclor 1254 at a concentration similar to that found at contaminated sites
Polychlorinated biphenyls (PCBs) are environmental contaminants known to cause adverse health effects to biological systems. Limited data are available on their effects on the immune system of wildlife species. Previously, we found that 4 and 6-week-old white-footed mice (Peromyscus leucopus) born from dams injected with a single dose (300 mg/kg) of Aroclor 1254, had altered...
Authors
M. Segre, S.M. Arena, E.H. Greeley, M. J. Melancon, D.A. Graham, J.B. French
The effects of polychlorinated biphenyls (Aroclor 1242) on thyroxine, estradiol, molt, and plumage characteristics in the American kestrel (Falco sparverius) The effects of polychlorinated biphenyls (Aroclor 1242) on thyroxine, estradiol, molt, and plumage characteristics in the American kestrel (Falco sparverius)
The purpose of this experiment was to determine the effects of Aroclor 1242, a mixture of polychlorinated biphenyls (PCBs), on plumage characteristics and molt in the American kestrel, Falco sparverills. Several characteristics of plumage. including color and molt schedule, are modulated by hormonal signals and hence may be modified by endocrine-active contaminants. If so, the functions...
Authors
M.J. Quinn, J.B. French, F.M.A. McNabb, M. A. Ottinger
Science and Products
Filter Total Items: 30
The role of thyroxine on the production of plumage in the American Kestrel (Falco sparterius) The role of thyroxine on the production of plumage in the American Kestrel (Falco sparterius)
No abstract available.
Authors
M.J. Quinn, J.B. French, F.M.A. McNabb, M. A. Ottinger
Blarina brevicauda as a biological monitor of polychlorinated biphenyls: Evaluation of hepatic cytochrome p450 induction Blarina brevicauda as a biological monitor of polychlorinated biphenyls: Evaluation of hepatic cytochrome p450 induction
We assessed the value of short-tailed shrews (Blarina brevicauda) as a possible biomonitor for polychlorinated biphenyl pollution through measurement of the induction of hepatic cytochrome P450 and associated enzyme activities. First, we checked the inducibility of four monooxygenases (benzyloxyresorufin-O-dealkylase [BROD], ethoxyresorufin-O-dealkylase [EROD], methoxyresorufin-O...
Authors
J.S. Russell, R.S. Halbrook, A. Woolf, J.B. French, M. J. Melancon
Zinc and lead poisoning in wild birds in the Tri-State Mining District (Oklahoma, Kansas, Missouri) Zinc and lead poisoning in wild birds in the Tri-State Mining District (Oklahoma, Kansas, Missouri)
contaminated with Pb, Cd, and Zn from mining, milling and smelting. Metals have been dispersed heterogeneously throughout the District in the form of milled mine waste ('chat'), as flotation tailings and from smelters as aerial deposition or slag. This study was conducted to determine if the habitat has been contaminated to the extent that the assessment populations of wild birds are...
Authors
W. N. Beyer, J. Dalgam, S. Dudding, J.B. French, R. Mateo, J. Miesner, L. Sileo, J. Spann
Establishing appropriate measures for monitoring aging in birds: comparing short and long lived species Establishing appropriate measures for monitoring aging in birds: comparing short and long lived species
In order to reveal patterns of reproductive aging in birds we focus on a short lived species, the Japanese quail and the American kestrel, which has a life span of medium length. Quail have been studied extensively in the laboratory as models for understanding avian endocrinology and behavior, and as a subject for toxicological research and testing. In the lab, Japanese quail show age...
Authors
M. A. Ottinger, E. Reed, J. Wu, N. Thompson, J.B. French
Immunological and physiological effects of chronic exposure of Peromyscus leucopus to Aroclor 1254 at a concentration similar to that found at contaminated sites Immunological and physiological effects of chronic exposure of Peromyscus leucopus to Aroclor 1254 at a concentration similar to that found at contaminated sites
Polychlorinated biphenyls (PCBs) are environmental contaminants known to cause adverse health effects to biological systems. Limited data are available on their effects on the immune system of wildlife species. Previously, we found that 4 and 6-week-old white-footed mice (Peromyscus leucopus) born from dams injected with a single dose (300 mg/kg) of Aroclor 1254, had altered...
Authors
M. Segre, S.M. Arena, E.H. Greeley, M. J. Melancon, D.A. Graham, J.B. French
The effects of polychlorinated biphenyls (Aroclor 1242) on thyroxine, estradiol, molt, and plumage characteristics in the American kestrel (Falco sparverius) The effects of polychlorinated biphenyls (Aroclor 1242) on thyroxine, estradiol, molt, and plumage characteristics in the American kestrel (Falco sparverius)
The purpose of this experiment was to determine the effects of Aroclor 1242, a mixture of polychlorinated biphenyls (PCBs), on plumage characteristics and molt in the American kestrel, Falco sparverills. Several characteristics of plumage. including color and molt schedule, are modulated by hormonal signals and hence may be modified by endocrine-active contaminants. If so, the functions...
Authors
M.J. Quinn, J.B. French, F.M.A. McNabb, M. A. Ottinger