Search Results - "Janz, D. M."

Dietary selenomethionine exposure in adult zebrafish alters swimming performance, energetics and the physiological stress response by Thomas, J.K., Janz, D.M.

“…Selenomethionine (Se-Met) is the major form of organoselenium present in food. Early life stages of oviparous vertebrate species, especially fish, are highly…”
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Selenium accumulation in aquatic biota downstream of a uranium mining and milling operation by Muscatello, J.R., Janz, D.M.

“…Uranium mining and milling operations have the potential to release trace elements such as arsenic, molybdenum, nickel, selenium and uranium and ions (e.g.,…”
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Accumulation of selenium in aquatic systems downstream of a uranium mining operation in northern Saskatchewan, Canada by Muscatello, J.R., Belknap, A.M., Janz, D.M.

“…The objective of this study was to investigate the accumulation of selenium in lakes downstream of a uranium mine operation in northern Saskatchewan, Canada…”
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Development and validation of methods for measuring multiple biochemical indices of condition in juvenile fishes by Weber, L. P., Higgins, P. S., Carlson, R. I., Janz, D. M.

“…The investigation established and validated methods to measure multiple biochemical indices of condition (whole body total lipids, whole body triglycerides,…”
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Embryo Microinjection of Selenomethionine Reduces Hatchability and Modifies Oxidant Responsive Gene Expression in Zebrafish by Thomas, J. K., Janz, D. M.

“…In previous studies we demonstrated that exposure to selenomethionine (SeMet) causes developmental toxicities in zebrafish ( Danio rerio ). The objectives of…”
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Tissue-specific HSP70 levels and reproductive physiological responses in fishes inhabiting a metal-contaminated creek by YOO, J. L, JANZ, D. M

“…The 70-kDa stress protein family (HSP70) plays important roles in a variety of physiological processes, including protein chaperoning, protection against…”
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Bioaccumulation of mercury in invertebrate food webs of Canadian Rocky Mountain streams by Painter, K. J., Janz, D. M., Jardine, T. D.

“…Methylmercury (MeHg) is a contaminant of concern because of its ability to biomagnify in aquatic food webs, resulting in potentially harmful concentrations in…”
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Glucocorticosteroid concentrations in feces and hair of captive caribou and reindeer following adrenocorticotropic hormone challenge by Ashley, N.T, Barboza, P.S, Macbeth, B.J, Janz, D.M, Cattet, M.R.L, Booth, R.K, Wasser, S.K

“…Highlights ► ACTH increases fecal glucocorticosteroids in caribou. ► Reduced sensitivity to ACTH in reindeer even when dose quadrupled. ► A single ACTH…”
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Mercury and cortisol in Western Hudson Bay polar bear hair by Bechshoft, T., Derocher, A. E., Richardson, E., Mislan, P., Lunn, N. J., Sonne, C., Dietz, R., Janz, D. M., St. Louis, V. L.

“…Non-invasive methods of assessing animal health and life history are becoming increasingly popular in wildlife research; hair samples from polar bears ( Ursus…”
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Dynamics of Rodent Assemblages Inhabiting Abandoned Petroleum Landfarms in Oklahoma by Wilson, J. A., Lochmiller, R. L., D. M. Janz

“…Studies on the effects of anthropogenic contamination on wildlife have largely been focused at the individual level. Biomarkers have been used to monitor…”
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Elevated Ovarian Follicular Apoptosis and Heat Shock Protein-70 Expression in White Sucker Exposed to Bleached Kraft Pulp Mill Effluent by Janz, David M., McMaster, Mark E., Munkittrick, Kelly R., Van Der Kraak, Glen

“…Exposure of feral fish populations to bleached kraft pulp mill effluent (BKME) results in a variety of negative impacts on reproductive fitness including…”
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Developmental estrogenic exposure in zebrafish ( Danio rerio): I. Effects on sex ratio and breeding success by Hill, Robert L., Janz, David M.

“…In vivo studies of fishes exposed to xenoestrogens have reported vitellogenin (Vtg) induction, ovatestes, altered sex ratios, and impaired reproductive…”
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Developmental estrogenic exposure in zebrafish ( Danio rerio): II. Histological evaluation of gametogenesis and organ toxicity by Weber, Lynn P., Hill, Robert L., Janz, David M.

“…Aquatic species can be exposed to endocrine disrupting chemicals (EDCs) in wastewater that often includes the weak estrogen, 4-nonylphenol (NP) and the potent…”
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2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) Induces Hepatic Cytochrome P450-Dependent Arachidonic Acid Epoxygenation in Diverse Avian Orders: Regioisomer Selectivity and Immunochemical Comparison of the TCDD-Induced P450s to CYP1A4 and 1A5 by Gilday, D., Bellward, G.D., Sanderson, J.T., Janz, D.M., Rifkind, A.B.

“…2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) markedly induced cytochrome P450 (CYP)-dependent arachidonic acid metabolism in liver microsomes from hatchlings of…”
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In ovo 2,3,7,8-tetrachlorodibenzo-p-dioxin exposure in three avian species. 2. Effects on estrogen receptor and plasma sex steroid hormones during the perinatal period by JANZ, D. M, BELLWARD, G. D

“…As opposed to mammals, the heterogametic sex in birds is female, and sexual differentiation of the central nervous system away from the intrinsic male pattern…”
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Elevated ovarian and thymic cell apoptosis in wild cotton rats inhabiting petrochemical-contaminated terrestrial ecosystems by Savabieasfahani, M, Lochmiller, R L, Janz, D M

“…The objective of this study was to determine the rates of apoptotic cell death in ovary and thymus collected from wild female cotton rats (Sigmodon hispidus)…”
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Effects of acute 2,3,7,8-tetrachlorodibenzo-p-dioxin exposure on plasma thyroid and sex steroid hormone concentrations and estrogen receptor levels in adult great blue herons by Janz, David M., Bellward, Gail D.

“…Adult great blue herons (Ardea herodias) were exposed intraperitoneally to a single dose of 20 μg/kg body weight of 2,3,7,8‐tetrachlorodibenzo‐p‐dioxin (TCDD)…”
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Effects of embryonic and adult exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin on hepatic microsomal testosterone hydroxylase activities in great blue herons (Ardea herodias) by Sanderson, J. Thomas, Janz, David M., Bellward, Gail D., Giesy, John P.

“…In a continuing effort to evaluate biomarkers of exposure of great blue herons (Ardea herodias) to 2,3,7,8‐tetrachlorodibenzo‐p‐dioxin (TCDD) and related…”
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Treated municipal sewage discharge affects multiple levels of biological organization in fish by Porter, Clint M., Janz, David M.

“…The objectives of this study were to examine cellular-, organ-, and organism-level responses in longear sunfish ( Lepomis megalotis) and fish community…”
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Effect of β-naphthoflavone and dimethylbenz[ a]anthracene on apoptosis and HSP70 expression in juvenile channel catfish ( Ictalurus punctatus) ovary by Weber, Lynn P., Janz, David M.

“…Complex environmental mixtures such as pulp mill effluents and crude oil have been shown to increase ovarian cell apoptosis and affect heat shock protein (HSP)…”
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