Results 131 to 140 of about 2,395 (182)
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Cholinergic control of the walking network in the crayfish Procambarus clarkii
Journal of Physiology-Paris, 1995The output of a neuronal network results generally from both the properties of the component neurons and their synaptic relationships. This article aims at synthesizing various results obtained on the neural network generating locomotion in vitro. In the preparation used, consisting of the last three thoracic ganglia (3-5) along with motor nerves from ...
Cattaert, D., Pearlstein, E., Clarac, F.
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Simultaneous determination of 16 herbicides in Procambarus clarkii
Food ChemistryThis study is focused on developing a sensitive and reliable analytical method for determining 16 herbicides in Procambarus clarkii using pass-through solid phase extraction coupled with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS).
Na, Li +7 more
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Nitrite toxicity to the crayfishProcambarus clarkii
Bulletin of Environmental Contamination and Toxicology, 1985The purpose of this study was to determine the effects of acute nitrite exposure to the crayfish Procambarus clarkii (Decapoda). Specific objectives of this study included (1) determining the 24-, 48-, 72- and 96-h LC-50's of nitrite to crayfish of different weights and genders in freshwater, (2) determining the LC-50's of nitrite to crayfish in water ...
M P, Gutzmer, J R, Tomasso
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Filtration barriers in the coelomic sac of the crayfish, Procambarus clarkii
Journal of Ultrastructure Research, 1978The crayfish coelomic sac forms a protein-free urine by ultrafiltration. Ultrastructural studies of the coelomic sac wall reveal two layers which may represent filtration barriers to the hemolymph proteins. These are the fibrillar basement membrane and the epithelial slit diaphragm. The diaphragm in P. clarkii, as revealed by fixation with tannic acid,
A, Schaffner, R, Rodewald
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Morphogenesis and pattern formation in the retina of the crayfish Procambarus clarkii
Cell and Tissue Research, 1998Pattern formation and ommatidial differentiation in the crayfish retina were analyzed using confocal, light and electron microscopy. Optic primordia first appear in the embryo as round elevations covered by a surface epithelial layer. Retinal differentiation begins with a wave of mitotic activity that moves across this epithelium from lateral to medial.
G S, Hafner, T R, Tokarski
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Chemosensory Stimuli for the Walking Legs of the Crayfish Procambarus clarkii
Journal of Chemical Ecology, 2002Studies of chemoreception in crustaceans have shown that flesh-eating species can detect amino acids, nucleotides and derivatives, and amines, while most herbivorous and omnivorous species are additionally sensitive to carbohydrates. We used extracellular recording techniques to evaluate the effectiveness of a range of nitrogen-containing compounds ...
Frank S, Corotto, Michele R, O'Brien
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Bioenergetics of juveniles of red swamp crayfish (Procambarus clarkii)
Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology, 2001Procambarus clarkii is an endemic North American crayfish species that was introduced into Spain in 1973 for aquacultural and fishing purposes. Although P. clarkii is a well-studied species for commercial production, there is a great gap in the knowledge of the bioenergetics of juveniles.
P J, Gutiérrez-Yurrita, C, Montes
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Curve Walking in Freely Moving Crayfish (Procambarus Clarkii)
Journal of Experimental Biology, 1998ABSTRACT The curve walking of freely moving crayfish trained to walk along a curved path during homing behaviour was investigated using a video-analysis system. The leg kinematics and leg phase relationships, as well as the relationship between stepping patterns and body axis rotation measured relative to external references, were ...
Domenici P, Jamon M, Clarac F
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Unusual neuromuscular junctions in the heart of the crayfish (Procambarus clarkii)
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1970The neuromuscular junctions in the crayfish heart were studied with the electron microscope and were classified into two types based on the characteristics of the post-synaptic side. Type I junction was characterized by a mazy post-synaptic apparatus which has been referred to in this work as the junctional envelope, consisting of the cytoplasmic ...
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Profiling the physiological and molecular response to sulfonamidic drug in Procambarus clarkii
Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 2014Sulfamethoxazole (SMZ) is one of the most widely employed sulfonamides. Because of the widespread use of SMZ, a considerable amount is indeed expected to be introduced into the environment. The cytotoxicity of SMZ relies mainly on arylhydroxylamine metabolites (S-NOH) of SMZ and it is associated with the production of reactive oxygen species (ROS ...
Nicosia, A +9 more
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