scholarly journals Toxic and interactive toxic effects of agrochemical substances and copper on Vibrio fischeri

2006 ◽  
Author(s):  
A. Kungolos ◽  
V. Tsiridis ◽  
P. Samaras ◽  
N. Tsiropoulos
Keyword(s):  
Vibrio Fischeri ◽  
Toxic Effects

Interactive toxic effects of heavy metals and humic acids on Vibrio fischeri

2006 ◽  
Vol 63 (1) ◽  
pp. 158-167 ◽  
Author(s):  
V. Tsiridis ◽  
M. Petala ◽  
P. Samaras ◽  
S. Hadjispyrou ◽  
G. Sakellaropoulos ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Humic Acids ◽  
Vibrio Fischeri ◽  
Toxic Effects

Comparative toxic effects of formulated simazine on Vibrio fischeri and gilthead seabream (Sparus aurata L.) larvae

Chemosphere ◽  
2004 ◽  
Vol 57 (11) ◽  
pp. 1725-1732 ◽  
Author(s):  
M.I. Arufe ◽  
J. Arellano ◽  
M.J. Moreno ◽  
C. Sarasquete
Keyword(s):  
Vibrio Fischeri ◽  
Sparus Aurata ◽  
Toxic Effects ◽  
Gilthead Seabream

scholarly journals Organophosphorus insecticides: Toxic effects and bioanalytical tests for evaluating toxicity during degradation processes

2013 ◽  
Vol 67 (2) ◽  
pp. 217-230 ◽  
Author(s):  
Mirjana Colovic ◽  
Danijela Krstic ◽  
Vesna Vasic ◽  
Aleksandra Bondzic ◽  
Gordana Uscumlic ◽  
...  
Keyword(s):  
Toxicity Test ◽  
Vibrio Fischeri ◽  
Uv Light ◽  
Human Lymphocytes ◽  
Toxic Effects ◽  
Proliferation Index ◽  
Toxicity Tests ◽  
Organophosphorus Insecticides ◽  
Ache Inhibitors ◽  
Degradation Processes

Organophosphorus insecticides have been the most applied group of insecticides for the last two decades. Their main toxic effects are related to irreversible inactivation of acetylcholinesterase (AChE). Actually, they covalently bind to serine OH group in the enzyme active site forming phosphorylated enzyme that cannot hydrolyze acetylcholine. Organophosphorus insecticides in the environment undergo the natural degradation pathway including mainly homogeneous and heterogeneous hydrolysis (especially at high pH) generating non-inhibiting products. Additionally, thio organophosphates are easily oxidized by naturally present oxidants and UV light, forming more toxic and stable oxons. Thus, oxidative degradation procedures, generally referred as advanced oxidation processes (AOP), have been applied for their efficient removal from contaminated waters. The most applied bioassays to monitor the organophosphate toxicity i.e. the detoxification degree during AOP are Vibrio fischeri and AChE bioassays. Vibrio fischeri toxicity test exploits bioluminescence as the measure of luciferase activity of this marine bacterium, whereas AChE bioassay is based on AChE activity inhibition. Both bioanalytical techniques are rapid (several minutes), simple, sensitive and reproducible. Vibrio fischeri test seems to be a versatile indicator of toxic compounds generated in AOP for organophosphorus insecticides degradation. However, detection of neurotoxic AChE inhibitors, which can be formed in AOP of some organophosphates, requires AChE bioassays. Therefore, AChE toxicity test is more appropriate for monitoring the degradation processes of thio organophosphates, because more toxic oxo organophosphates might be formed and overlooked by Vibrio fischeri bioluminescence inhibition. In addition, during organophosphates removal by AOP, compounds with strong genotoxic potential may be formed, which cannot be detected by standard toxicity tests. For this reason, determination of incidence of micronuclei and cell proliferation index in cultivated human lymphocytes and fibroblasts is suitable for evaluation of organophosphorus insecticides and their break down products inducing cytogenetic damage.

scholarly journals Interactive Toxic Effects of Heavy Metals and Diesel on Vibrio fischeri

2014 ◽  
Vol 30 (4) ◽  
pp. 403-408 ◽  
Author(s):  
Hyun Jung ◽  
Sookhyun Park ◽  
Yu Sik Hwang
Keyword(s):  
Heavy Metals ◽  
Vibrio Fischeri ◽  
Toxic Effects

Ultrastructure of the effect of T-514 obtained from Karwinskia humboldtiana on assembly and integrity of yeast's peroxisomes

1991 ◽  
Vol 49 ◽  
pp. 136-137
Author(s):  
J. Sepulveda-Saavedra ◽  
I. Vander-Klei ◽  
M. Venhuis ◽  
Y. Piñeyro-Lopez
Keyword(s):  
Culture Conditions ◽  
Toxic Effects ◽  
Candida Boidinii ◽  
Central Mexico ◽  
Poisonous Plant ◽  
Biological Behaviour ◽  
Enzyme Content ◽  
Fat Deposits ◽  
Yeast Model

Karwinskia humboldtiana is a poisonous plant that grows in semi desertic areas in north and central México. It produces several substances with different toxic effects. One of them designated T-514 damages severely the lung, kidney and liver, producing in the hepatoeyte large intracellular fat deposits and necrosis. Preliminary observations demonstrated that three is a decrease in the amount of peroxisomes in the hepatocytes of experimentally intoxicated rats and monkeys. To study the effect exerted by the T-514 on peroxisomes, a yeast model was selected, thus, three species: Saccha romices cerevisiae, Ilansenula polymorpha and Candida boidinii were used, because there is information concerning their peroxisome's morphology, enzyme content, biological behaviour under different culture conditions and biogenesis.

Some Conditions Necessary for Pinocytosis

1968 ◽  
Vol 26 ◽  
pp. 142-143
Author(s):  
M. W. Brightman
Keyword(s):  
Smooth Muscle ◽  
Cell Membrane ◽  
Toxic Effects ◽  
Cytological Evidence ◽  
Cell Processes

The cytological evidence for pinocytosis is the focal infolding of the cell membrane to form surface pits that eventually pinch off and move into the cytoplasm. This activity, which can be inhibited by oxidative and glycolytic poisons, is performed only by cell processes that are at least 300A wide. However, the interpretation of such toxic effects becomes equivocal if the membrane invaginations do not normally lead to the formation of migratory vesicles, as in some endothelia and in smooth muscle. The present study is an attempt to set forth some conditions under which pinocytosis, as distinct from the mere inclusion of material in surface invaginations, can take place.

Toxic effects of aerosol propellants on the heart

1973 ◽  
Vol 131 (1) ◽  
pp. 162-166 ◽  
Author(s):  
W. S. Harris
Keyword(s):  
Toxic Effects
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