14 Result(s)

Article

Étude de l'activité in vitro de la glycogène phosphorylase de la Carpe (Cyprinus carpio L.)

In this paper we give some values of glycogen phosphorylase activity of heart, red muscle and white muscle from the Carp. We show that in vitro optimum temperature is 25°C for the fish, and not 30°C as in Mamm...

J. C. Murat, J. P. Parent, A. Serfaty in Experientia (1973)

Article

Studies on the biology of the red sea bream Chrysophrys major III. Metabolic response to starvation in different salinities

Red sea breams were kept at 20°C without food at 3 salinities (full sea water, 950 mOsm kg^-1; 2/3 sea water, 640 mOsm kg^-1; 1/3 sea water, 330 mOsm kg^-1). In fish adapted to all 3 salinities, starvation resulted ...

N. Y. S. Woo, J. C. Murat in Marine Biology (1981)

Article

Expression of stress proteins in cultured human cells as a sensitive indicator of metal toxicity

Human cell lines cultured under standardized conditions are found to react after a wide variety of aggressive but sub-lethal treatments by expressing stress proteins, mainly of the HSP68, HSP70 and HSP90 famil...

F. Delmas, V. Trocheris, C. Miro, J. C. Murat… in Fresenius' Journal of Analytical Chemistry (1996)

Article

Toxicity of cadmium species on luminescent bacteria

The toxicity of cadmium compounds against luminescent bacteria has been measured using the Microtox^R toxicity bioassay and has been related to the cadmium species. Since the Microtox^R test is carried out in NaCl ...

I. Villaescusa, M. Pilar, C. Hosta… in Fresenius' Journal of Analytical Chemistry (1996)

Article

Hsp72 mRNA production in cultured human cells submitted to nonlethal aggression by heat, ethanol, or propanol. Application to the detection of low concentrations of chromium(VI) (potassium dichromate)

The HT29 and HepG2 human cell lines have been shown to express stress proteins (heat shock proteins, HSP) when submitted to a variety of sublethal environmental aggressions. In the present study, these cells w...

F. Delmas, S. Schaak, Y. Gaubin, F. Croute, C. Arrabit… in Cell Biology and Toxicology (1998)

Article

Evaluation of lead(II) and nickel(II) toxicity in NaCl and NaClO4 solutions by using MicrotoxR bioassay

The toxicity of nickel and lead compounds has been evaluated in NaCl and NaClO₄ solutions by using the Microtox^R bioassay. The aim of this work was to assess the toxicity of the different species in solution whe...

I. Villaescusa, C. Matas, C. Hosta… in Fresenius' Journal of Analytical Chemistry (1998)

Article

Effect of Zinc Chloro Complexes to Photoluminescent Bacteria: Dependence of Toxicity on Metal Speciation

I. Villaescusa, I. Casas, M. Martínez… in Bulletin of Environmental Contamination an… (2000)

Article

Effect of pH on Arsenate and Arsenite Toxicity to Luminescent Bacteria (Vibrio fischeri)

Arsenic is an abundant metalloid and a dangerous pollutant when in solution under the arsenate or arsenite forms—As(V) and As(III), respectively. Since its biological effects are expected to depend on the oxid...

E. Fulladosa, J. C. Murat, M. Martínez… in Archives of Environmental Contamination an… (2004)

Chapter

Cultured Human Cells as Biological Detectors for Assessing Environmental Toxicity

The presented investigations were carried out in order to detect environmental pollutants using the HT29, HepG2 and A549 cultured human cells as biological sensors of toxicity. We measured the growth rate inhi...

E. Fulladosa, Y. Gaubin, D. Skandrani, I. Villaescusa… in Environmental Chemistry (2005)

Chapter

Study of Cr(VI) and Cd(II) Ions Toxicity Using the Microtox Bacterial Bioassay

The Microtox® bioassay, based upon the fading of light emitted by the luminescent bacteria Vibrio fischeri when exposed to noxious substances, was used for studying the changes in speciation and the related chang...

E. Fulladosa, I. Villaescusa, M. Martínez, J.-C. Murat in Environmental Chemistry (2005)

Article

Effect of Cadmium(II), Chromium(VI), and Arsenic(V) on Long-Term Viability- and Growth-Inhibition Assays Using Vibrio fischeri Marine Bacteria

As a complement to previous results obtained using the standard Microtox acute-toxicity test, which is based on measuring the rapid decrease of bioluminescence (5 to 30 minutes of exposure) in Vibrio fischeri bac...

E Fulladosa, J. C. Murat, I. Villaescusa in Archives of Environmental Contamination an… (2005)

Article

Effect of arsenic compounds on Vibrio fischeri light emission and butyrylcholinesterase activity

The effect of organic arsenic compounds and inorganic As(V) and As(III) on Vibrio fischeri luminescence and butyrylcholinesterase activity were evaluated using Microtox and microcalorimetric analysis. Organic ars...

E. Fulladosa, J. Debord, I. Villaescusa, J. C. Bollinger… in Environmental Chemistry Letters (2007)

Article

Long-term Exposure to Low Lithium Concentrations Stimulates Proliferation, Modifies Stress Protein Expression Pattern and Enhances Resistance to Oxidative Stress in SH-SY5Y Cells

SH-SY5Y cells, derived from a human neuroblastoma, were submitted to short- or long-term exposures to lithium carbonate concentrations ranging from 0.5 to 8 mM. Short-term exposures (4 days) to concentrations ...

M. S. Allagui, R. Nciri, M. F. Rouhaud, J. C. Murat, A. El Feki… in Neurochemical Research (2009)