نتایج جستجو برای: sublethal dose

تعداد نتایج: 313593  

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2004
C B R Martinez M Y Nagae C T B V Zaia D A M Zaia

The present study investigated lead effects on gill morphology, hematocrit, blood sodium, glucose, lipids, protein, and cholesterol of Prochilodus lineatus exposed to two sublethal lead concentrations for 96 h. Preliminary series of short-term static toxicity tests were run to determine LC50 (96 h) of lead in P. lineatus, which was 95 mg Pb.L-1. Therefore, lead concentrations tested in the subl...

Journal: :The British journal of ophthalmology 1999
N Ohguro M Fukuda T Sasabe Y Tano

AIMS To evaluate the effects of hydrogen peroxide exposure on the survival and proliferation of cultured lens epithelial cells. METHODS TOTL-86 cells, a line of rabbit lens epithelial cells, were used. The survival and proliferation of TOTL-86 cells were quantified by a rapid colorimetric assay (MTT assay). To determine the effects of hydrogen peroxide, TOTL-86 cells were exposed to different...

2013
Elizabeth H. Beers Rebecca A. Schmidt

Fifteen pesticides were tested in laboratory bioassays on Galendromus occidentalis (Nesbitt), the principal phytoseiid mite predator in Washington apple orchards. We developed a rating system for pesticides using lethal and sublethal effects, and applied the rating system to our results. At the 1 dose, only spinetoram and lambda-cyhalothrin caused >75% acute mortality of females. Carbaryl, azin...

Journal: :Acta medica 2010
Jirí Kassa Jana Zdarová Karasová Sandra Tesarová Kamil Musílek Kamil Kuca

The ability of newly developed oximes (K347, K628) to reduce tabun-induced acute neurotoxic signs and symptoms was compared with currently available oximes (obidoxime, HI-6) using a functional observational battery. The neuroprotective effects of the oximes studied (K347, K628, obidoxime, HI-6) combined with atropine on rats poisoned with tabun at a sublethal dose (220 microg/kg i.m.; 80% of LD...

Journal: :Infection and immunity 2005
Eric Yager Constantine Bitsaktsis Bisweswar Nandi Jere W McBride Gary Winslow

Although cellular immunity is essential for host defense during intracellular bacterial infections, humoral immunity can also play a significant role in host defense during infection by some intracellular bacteria, including the ehrlichiae. Antibodies can protect susceptible SCID mice from fatal Ehrlichia chaffeensis infection, an observation that has been hypothesized to involve the opsonizati...

2009
Jiri Kassa Jana Zdarova Karasova Kamil Musilek Kamil Kuca Young-Sik Jung

The potency of newly developed bispyridinium compounds (K117, K127) to reduce tabun-induced acute neurotoxic signs and symptoms was compared with currently available oxime (obidoxime) using functional observational battery. The neuroprotective effects of atropine alone and atropine combined with one of three bispyridinium oximes (K117, K127, obidoxime) on rats poisoned with tabun at a sublethal...

Journal: :Environmental toxicology and chemistry 2005
Jason F Sandahl David H Baldwin Jeffrey J Jenkins Nathaniel L Scholz

Chlorpyrifos is a common organophosphate insecticide that has been widely detected in surface waters that provide habitat for Pacific salmon in the western United States. Although chlorpyrifos is known to inhibit acetylcholinesterase (AChE) in the brain and muscle of salmonids, the relationship between sublethal AChE inhibition and more integrative indicators of neuro-behavioral impairment are ...

Journal: :The Journal of experimental biology 2012
Daren M Eiri James C Nieh

A nicotinic acetylcholine receptor agonist, imidacloprid, impairs memory formation in honey bees and has general effects on foraging. However, little is known about how this agonist affects two specific aspects of foraging: sucrose responsiveness (SR) and waggle dancing (which recruits nestmates). Using lab and field experiments, we tested the effect of sublethal doses of imidacloprid on (1) be...

2015
Julie Fourrier Matthieu Deschamps Léa Droin Cédric Alaux Dominique Fortini Dominique Beslay Yves Le Conte James Devillers Pierrick Aupinel Axel Decourtye Olav Rueppell

BACKGROUND Juvenile hormone (JH) plays an important role in honeybee development and the regulation of age-related division of labor. However, honeybees can be exposed to insect growth regulators (IGRs), such as JH analogs developed for insect pest and vector control. Although their side effects as endocrine disruptors on honeybee larval or adult stages have been studied, little is known about ...

Journal: :Environmental toxicology and chemistry 2007
Lance J Schuler Peter F Landrum Michael J Lydy

Internal body residue has been recognized as a potential dose metric for toxicological assessments. This relationship between body residue and biological effects, including both lethal and sublethal effects, is critically important for determining environmental quality in risk assessments. The present study identified the toxic equivalent body residues for fluoranthene (FLU) and pentachlorobenz...

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