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  • Molecular Cell Biology
  • Biology
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  • 1
    Electronic Resource
    Electronic Resource
    Biochemical studies on torpedo californica acetylcholine receptorsThis research was supported by USPHS Grant NS-10294 and a grant from the Sloan Foundation. (1973)
    New York, N.Y. : Wiley-Blackwell
    Journal of Supramolecular Structure 1 (1973), S. 360-367 
    Details
    ISSN: 0091-7419
    Keywords: Life Sciences ; Molecular Cell Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jss.400010414
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of cholinergic ligands on the lipids of acetylcholine receptor-rich membrane preparations from torpedo californica (1976)
    New York, N.Y. : Wiley-Blackwell
    Journal of Supramolecular Structure 4 (1976), S. 373-380 
    Details
    ISSN: 0091-7419
    Keywords: Life Sciences ; Molecular Cell Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Ion permeation, triggered by ligand-receptor interaction, is associated with the primary events of membrane depolarization at the neuromuscular junction and synaptic connections. To explore the possible sites of ion permeation, the long-lived fluorescent probe pyrene (fluorescence lifetime ∼400 nsec) has been inserted into the lipid phase of acetylcholine receptor-rich membrane (AcChR-M) preparations from Torpedo californica. The pyrene probe is susceptible to both fluidity and permeability changes in the lipid bilayer. These changes are detected by variations in the rate of decay of the excited singlet state of pyrene after pulsation with a 10-nsec ruby laser flash. Variations of these lifetimes in the membrane preparations alone or in the presence of quenchers show that binding of cholinergic agonists and antagonists, neurotoxins, and local anesthetics to AcChR-M produces varying effects on the properties of the pyrene probe in the lipid phase.It is concluded that binding of cholinergic ligands to the receptor does not significantly alter the fluidity or permeability of the lipids in the bilayer in contact with pyrene. On the other hand, local anesthetics do affect these properties.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jss.400040308
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  • 3
    Electronic Resource
    Electronic Resource
    Pyrenesulfonyl azide as a fluorescent label for the study of protein-lipid boundaries of acetylcholine receptors in membranes (1979)
    New York, N.Y. : Wiley-Blackwell
    Journal of Supramolecular Structure 11 (1979), S. 327-338 
    Details
    ISSN: 0091-7419
    Keywords: AcChR-enriched membranes ; pyrenesulfonyl azide ; fluorescent probes ; photolabeling ; Life Sciences ; Molecular Cell Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Acetylcholine receptor (AcChR) enriched membrane fragments from Torpedo californica electroplax were labeled by in situ photogenerated nitrenes from a hydrophobic fluorescent probe, pyrene-1-sulfonyl azide. Preferential photolabeling of membrane proteins, mainly AcChR, has been achieved and there is a pronounced exposure of the 48,000 and 55,000 molecular weight subunits of AcChR to the lipid environment of the membrane core.Covalent attachment of the photogenerated fluorescence probe does not perturb the α-neurotoxins' binding properties of membrane-bound AcChR or the desensitization kinetics induced by prolonged exposures to cholinergic agonists. Non-covalent photoproducts can be conveniently removed from labeled membrane preparations by exchange into lipid vesicles prepared from electroplax membrane lipids. Fluorescence features of model pyrene sulfonyl amide derivatives, such as fine vibrational structure of emission spectra or fluorescence lifetimes, are highly sensitive to the solvent milieu. The covalently bound probe shows similar fluorescence properties in situ. PySA photoproducts have great potential to spectroscopically monitor neurotransmitter induced events on selected AcChR subunits exposed to the hydrophobic environment of membranes.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jss.400110308
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  • 4
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    Colección de corales pétreos de Cuba. [Versión electrónica para multimedia del libro Corales Pétreos de Cuba publicado en 1980 por Nereida Martínez Estalella y Vasil Zlatarski.] (2021)
    Acuario Nacional de Cuba | La Habana, Cuba
    In:  elenag@acuarionacional.cu | http://aquaticcommons.org/id/eprint/15273 | 1545 | 2014-06-30 10:46:33 | 15273 | Acuario Nacional de Cuba
    Details
    Publication Date: 2021-07-05
    Description: Versión electrónica para multimedia del libro Corales Pétreos de Cuba publicado en 1980 por Nereida Martínez Estalella y Vasil Zlatarski. La colección de Corales pétreos se formó en el Instituto de Oceanología entre los años 1970 y 1975. En 2005 pasa a ser custodiada por el Acuario Nacional con el resto de las colecciones biológicas.La colección está formada por 4,990 ejemplares, 2 Clases Anthozoa e Hydrozoa , 16 familias, 30 géneros, 45 especies y 23 formas.Multimedia electronic book version of Stony Corals Cuba published in 1980 by Nereida Martínez Estalella and Vasil Zlatarski.The collection of stony corals are formed at the Institute of Oceanology between 1970 and 1975. Renumbered in 2005 by the National Aquarium guarded with other biological collections. The collection consists of 4,990 samples, 2 classes Anthozoa and Hydrozoa, 16 families, 30 genera, 45 species and 23 forms.
    Keywords: Biology ; Conservation ; Ecology ; Instituto de Oceanología ; corals ; taxonomía ; taxonomy ; videos ; Scleractinea ; Acroporidae ; Agariciidae ; Astrangiidae ; Caryophylliidae ; Columnastraeidae ; Hydrozoa ; Milleporina ; zlatarski
    Repository Name: AquaDocs
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  • 5
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    Larval development of the spotfin tonguefish (Symphurus oligomerus Mahadeva and Munroe, 1990) (Pleuronectiformes: Cynoglossidae) from the Gulf of California, Mexico (2021)
    In:  http://aquaticcommons.org/id/eprint/8766 | 403 | 2012-06-10 09:02:05 | 8766 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: Larval and early juvenile stages of Symphurus oligomerus aredescribed from 24 specimens from the Gulf of California. Meristic features were 48 – 49 total vertebrae, 87–94dorsal-fin rays, 73–77 anal-fin rays, 12 caudal-fin rays, and five hypural bones. Seven larvae and one juvenile were cleared and stained to obtain the pterygiophore formula (1-3-2-2-2) that confirmed the identification of S. oligomerus. The pigment pattern from preflexion to juvenile stage consists of three bands on the dorsal margin and two bands on the ventral margin formed by star-shaped melanophores on the left side of the body. The intestine in preflexion to postflexion larvae forms an abdominalprojection that ends in a short conical appendix. The intestine is supported by three cartilaginous struts; larvaewith these physical attributes are called exterilium larvae. Preflexion larvae have two elongated dorsal-finrays, and in flexion to postflexion larvae the second to the fourth dorsalfin rays are elongate. We found anapparent connection between the size at metamorphosis of the species of Symphurus and the depth distributionrange of adults such that the fish species that metamorphose at a larger size have a deeper distributionas adults and exterilium larvae seem to correspond to species that have deeper distributions.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
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  • 6
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    Spatial and seasonal abundance of sand seatrout (Cynoscion arenarius) and silver seatrout (C. nothus) off the coast of Texas, determined with twenty years of data (1987–200 (2021)
    In:  http://aquaticcommons.org/id/eprint/8809 | 403 | 2012-06-12 17:57:49 | 8809 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: Sand seatrout (Cynoscion arenarius) and silver seatrout (C.nothus) are both found within the immediate offshore areas of the Gulf of Mexico, especially around Texas; however information is limited on how much distributional overlap really occurs between these species. In order to investigate spatial and seasonal differences between species, we analyzed twenty years of bay and offshore trawl data collected by biologists of the Coastal Fisheries Division, Texas Parks and Wildlife Department. Sand seatrout and silver seatrout were distributed differently among offshore sampling areas, and salinity and water depth appeared to correlate with their distribution. Additionally,within the northernmost sampling area of the gulf waters, water depth correlated significantly with the presence of silver seatrout, which were found at deeper depths than sandseatrout. There was also an overall significant decrease in silver seatrout abundance during the summer season, when temperatures were at their highest, and this decrease mayhave indicated a migration farther offshore. Sand seatrout abundance had an inverse relationship with salinity and water depth offshore. In addition, sand seatrout abundance was highest in bays with direct passes to the gulf and correlated with corresponding abundance in offshore areas. These data highlight the seasonal and spatial differences in abundance between sand and silver seatrout and relatethese differences to the hydrological and geological features found along the Texas coastline.
    Keywords: Biology ; Ecology ; Fisheries
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    Format: 24-35
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  • 7
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    Short communication: Effects of the addition of a marigold extract to diets fed to channel catfish (Ictalurus punctatus) on growth parameters (2021)
    In:  http://aquaticcommons.org/id/eprint/22817 | 18721 | 2018-05-24 22:03:44 | 22817 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-10
    Description: The expansion of aquaculture in the last 10 years has made it an important source of protein worldwide. However, increased production, and the culture intensification it carries, results in higher risk of infectious disease due to poor water quality and high stocking densities. ... Marigold (Tagetes erecta L.) is a plant native to Mexico whose flowers accumulate carotenoids. Natural carotenoids extracted from marigold have been used in aquaculture to help in the survival of fish juvenile stages by strengthening their immunological system, thus reducing mortality rates. The effect of carotenoids in fish health may exert a positive effect on fish growth indices; however, these effects on growth parameters have not been studied in channel catfish (Ictalurus punctatus), which is the most cultured fish species in north-eastern Mexico, and one of the most cultured on the southern United States. Consequently, the aim of this study was to investigate if there were significant differences in growth among channel catfish juveniles when fed diets containing various carotenoid doses from a natural source.
    Keywords: Aquaculture ; Biology ; Fisheries ; Catfish ; Marigold extract ; Growth ; Ictalurus punctatus ; aquaculture ; México
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    Format: 797-804
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  • 8
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    Mixed milt fertilization of endangered Caspian brown trout Salmo trutta caspius influences effective population size of breeders (2021)
    In:  http://aquaticcommons.org/id/eprint/22784 | 18721 | 2018-05-22 17:50:27 | 22784 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-10
    Description: The maintenance of the endangered Caspian brown trout Salmo trutta caspius populations in Iran depends on its artificial breeding. There is no information on how current hatchery breeding protocol influences effective population size of breeders (Ne), which is a critical parameter to maintain genetic diversity in future generations. The current hatchery protocol (CHP) was comparatively evaluated with a balanced hatchery protocol (BHP), where mixtures of equal amounts of gametes per male and female breeder were used to balance parental contributions to progeny. To evaluate putative differences in viability between families, individual crosses were performed and fertilized ova of different families were mixed to constitute balanced family pools. 1440 alevins were totally sampled in the crosses performed from the 11 breeders. An exclusion-based parentage approach using three polymorphic microsatellite markers unambiguously assigned more than 93% of progeny to a single pair of parents. Significantly different contributions of breeders to progeny were observed in CHP (p〈0.05). The primary constraint on Ne in BHP was the unbalanced contribution of males, which seemed a consequence of sperm competition in mixed fertilization caused by differences in sperm quality. Sperm motility duration was positively correlated with the number of sired progeny by each male. The results illustrate the limitations of the BHP in minimizing the loss of genetic diversity observed in CHP. A protocol based on mixture of equal number of fertilized ova from individual male × female crosses emerged as the best alternative for conservation of Caspian brown trout.
    Keywords: Aquaculture ; Biology ; Conservation ; Fisheries ; Caspian brown trout ; Salmo trutta caspius ; Mixed milt fertilization ; Effective population size ; Sperm competition ; Microsatellite ; aquaculture ; Caspian Sea ; Iran
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  • 9
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    Nota acerca de los nombres vernáculos de peces en el Paraná medio. (2021)
    In:  http://aquaticcommons.org/id/eprint/1946 | 196 | 2010-12-09 16:07:34 | 1946
    Details
    Publication Date: 2021-07-11
    Description: Lista complementaria del trabajo de Pozzi sobre Sistemática y distribución de los peces de agua dulce de la República Argentina, donde se incluyen sólo los nombres faltantes o los extensivos a otras especies o los que tengan distinta significación.
    Description: Museo Provincias de Ciencias Naturales "Florentino Ameghino"
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota) - Serie Documentos Relacionados
    Description: MARTÍNEZ ACHENBACH, G. & A. A. BONETTO. 1957. Nota acerca de los nombres vernáculos de peces en el Paraná medio. An. Com. Mus. Prov. Cs. Nat. "F. Ameghino", Argentina, Zool., 1(2): 1-11. Series: ProBiota - Serie Documentos Relacionados
    Keywords: Biology ; Limnology ; Argentina ; Paraná river ; Río Paraná ; Ichthyology ; Ictiología- List of vernacular names ; Lista de nombres vernáculos ; Peces ; Fishes
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  • 10
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    Nota acerca de una especimen del género Potamotrygon (Chondrichthyes, Potamotrygonidae). (2021)
    In:  http://aquaticcommons.org/id/eprint/1954 | 196 | 2011-09-29 19:51:42 | 1954
    Details
    Publication Date: 2021-07-11
    Description: Its deal with the study of a sample of "river ray" of the Potamotrygonidae family procured in the Colastiné river (Midle Paraná)showing an external morphology relating it closely to two species of said family: Potamotrygon falkneri Castex y Maciel, 1963 and P. menchacai Martínez Achembach, 1965.
    Description: Museo de Ciencias Naturales "Florentino Ameghino"
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota) - Serie Documentos Relacionados
    Description: Debe citarse: MARTÍNEZ ACHEMBACH, G. 1971. Nota acerca de una especimen del género Potamotrygon (Chondrichthyes, Potamotrygonidae). Com. Mus. Prov. Cs. Nat. "F. Ameghino", Zool. 5: 1-10 Series: Probiota, Serie Documentos Relacionados
    Keywords: Biology ; Limnology ; Argentina ; Santa Fe province ; Provincia de Santa Fe ; Ichthyology ; Ictiología ; Potamotrygon ; Systematics ; Sistemática ; Zoogeography ; Zoogeografía
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