|
|
|
| Registros recuperados: 22 | |
|
|
| Mora-Cristancho, J.; Zea, S.; Gil-Agudelo, D.. |
| Las superficies sumerigdas en el mar son densamente colonizadas por bacterias y sus interacciones, tales como la inhibición del crecimiento, son importantes para determinar el desarollo de comunidades bactarinas, como también de posteriores etapas de las macroepibiosis. Para determinar el potencial de interacción entre bactarias de las biopelículas de esponjas, se realizaron ensayos de actividad de inhibición in vitro de crecimiento entre cepas bacterianas aisladas de superficies con diferente grado de macroepibiosis, de las esponjas Apysina insularis (limpia), Aplysina lacunosa (con macroepibiosis) y de la superficie calcárea de la concha del molusco bivalvo Donax sp. El procentaje total de interacción antagónica entre estas cepas bacterianas fue del 64... |
| Tipo: Journal Contribution |
Palavras-chave: Epibiosis; Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3574 |
| |
|
|
| Regalado, E.L.; Mendiola, J.; Laguna, A.; Nogueiras, C.; Thomas, O.P.. |
| A method involving flash chromatography, semi-preparative phenylhexyl RP HPLC-DAD-ELSD combined with analytic polar-RP HPLC-DAD, was applied to separate and purify six highly nitrogenated bases and a bicyclic amidine alkaloid, the major components of the marine sponge Niphates digitalis. Their structures were identified as 1,8-diazabicyclo[5.4.0]undec-7- ene (1), deoxycytidine (2), phenylalanine (3), adenosine (4), deoxyguanosine (5), adenine (6) and thymidine (7) on the basis of spectroscopic data analyses. This is the first report of these compounds in a marine sponge belonging to the Niphates genus and the first evidence of the presence of 1 from a natural source. |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Cytotoxicity; Cytotoxicity; Sponges; Http://aims.fao.org/aos/agrovoc/c_34251; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3860 |
| |
|
|
| Bejarano-Chavarro, S.; Zea, S.; Díaz, J.M.. |
| Ophiuroids are conspicuous dwellers of exposed and cryptic microhabitats available in coral reefs. This investigation pretended to discern ophiuroid community composition at microhabitats available in sponges and other reef components of different character (biotic v s. abiotic) or position over the substrate (elevated v s. non- elevated), at shallow reefs within the Montastraea spp. zone at San Bernardo Archipelago (Colombian Caribbean). Evaluating the abundance of organisms related to availability of different microhabitats, schemes of exclusive or preferential occupation of a particular elevated component were determined. These schemes, are discussed as initial cues that suggest the existence of benefic ecological relations. Samplings were performed at... |
| Tipo: Journal Contribution |
Palavras-chave: Microhabitats; Epibiosis; Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/3052 |
| |
|
|
| Llanio, M.; Fernández, M.D.; Mata, A.; Cabrera, B.; Pérez, M.. |
| En la actualidad existe una tendencia en el mundo por descubrir nuevos fármacos que puedan dar respuesta a diferentes enfermedades, muchas de ellas aún sin solución y otras de difícil tratamiento. En las últimas dos décadas diversos grupos de científicos se han concentrado en la obtención de compuestos naturales marinos, ya que los mismos representan una fuente de nuevas estructuras químicas. La farmacología marina ha dirigido su atención en algunas áreas de desarrollo farmacéutico con énfasis en el cáncer y en enfermedades inflamatorias. En este trabajo realizamos el estudio de dos extractos de esponjas de la plataforma cubana como posibles fuentes de antiinflamatorios y/o analgésicos. Para lograr este objetivo se evaluaron los mismos en los modelos de... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/2923 |
| |
|
|
| Márquez, J.C.; Zea, S.; López-Victoria, M.. |
| Temperaturas del agua de mar por encima del promedio durante 2005 en el Archipiélago de las Islas del Rosario (Caribe Colombiano) causaron un blanqueamiento coralino masivo en aguas someras (hasta 2-3 m de profundidad). Para confirmar resultados previos en los que el estrés inducido por calentamiento del agua en los corales puede acelerar la velocidad a la que esponjas excavadoras incrustantes le ganan espacio a los corales vivos, se contrastaron las tasas de propagación lateral en individuos de la esponja Cliona tenuis previamente marcados, que estaban colonizando los corales Diploria strigosa y Siderastrea siderea a profundidades de 5 - 6 m. Se hicieron comparaciones pareadas del avance de cada individuo de esponja entre dos intervalos de medida... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Coral; Competitors; Associated species; Temperature effects; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1987 |
| |
|
| |
|
| |
|
|
| Bouamama, K.; El Bour, M.; Ben Mustapha, K.; El Abed, A.. |
| Afin de contribuer à l’inventaire des éponges (Demospongiae, Porifera) en Tunisie, Nous avons entrepris une série d’échantillonnage au niveau de 5 zones différentes de la côte tunisienne : Salammbô, Korbous, Kélibia, Les îles de Kerkennah et la lagune d’El Bibane. L’étude de la systématique de 66 échantillons d’éponges collectées a permis d’identifier 16 espèces appartenant à 6 ordres différents, répartis de façon non homogène, avec la dominance de l’ordre des Dictyoceratida. Hymeniacidon perlevis présente la plus large répartition puisqu’elle est la seule à retrouver dans tous les sites de prélèvements. Aussi, une plus grande diversité d’éponges est révélée dans la côte sud (15 espèces) relativement à celle trouvée au nord (Salammbô, Korbous et Kélibia... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3703 |
| |
|
| |
|
|
| Caballero, H.; Busutil, L.; García, Y.; Alcolado, P.M.. |
| The sponge communities at four locations on the east coast of Bahía de Cochinos were surveyed in October 2002. At each location, sampling sites were established in the ecological zones of patch reef (3 m), shallow terrace (6-10 m), and deep terrace (15 m). The line-transect method with a 10 m line as sampling unit was used to measure sponge bottom coverage, and a 1 m square grid was used to quantify sponge community density. Species heterogeneity and species richness indices showed variability among sites and tended to increase with depth. Thirty species belonging to 19 families and 21 genera were found. The most common species were: Mycale laevis, Aplysina cauliformis, Cliona aprica, Aplysina fistularis, and Ectyoplasia ferox, which comprised 48% of the... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Aquatic communities; Coral reefs; Aquatic communities; Coral reefs; Sponges; Http://aims.fao.org/aos/agrovoc/c_553; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3523 |
| |
|
|
| Llanio, M. D.; Fernández, M. D.; Mata, A.; Cabrera, B.; Pérez, M.. |
| At present, there is a worldwide tendency to discover new drugs that provide an answer to treat different illnesses, many of them still without solution and others of difficult treatment. In the last two decades, diverse groups of scientists have concentrated on obtaining natural marine compounds, since they represent a source of new chemical structures. Marine pharmacology has focused its attention on some areas of pharmaceutical development with emphasis on cancer and on inflammatory illnesses. In this work we carry out the study of two extracts from sponges of the Cuban shelf as possible sources of anti-inflammatory and/or analgesic compounds. To achieve this objective the extracts were evaluated in the models of inhibition of phospholipase A2 of bee... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/3344 |
| |
|
|
| Llanio, M.; Fernàndez, M.D.; Cabrera, B.; Aneiros, A.. |
| Los invertebrados y las plantas marinas han provisto una nueva fuente de sustancias farmacológicas para el estudio de mecanismos que median los procesos inflamatorios (Jacobs et al., 1993). Se han descubierto nuevas clases estructurales de compuestos antiinflamatorios en la evaluación farmacológica de productos naturales marinos puros aislados de esponjas, gorgonias, corales y algas (Glaser et al., 1989). Debido a que en las costas cubanas hay abundancia de especies marinas, particularmente esponjas y celenterados aún poco estudiados, decidimos explorar los posibles efectos antiinflamatorios-analgésicos de cinco extractos provenientes de esponjas y gorgonias de nuestro archipiélago. |
| Tipo: Journal Contribution |
Palavras-chave: Marine ecology; Sponges; Marine ecology; Sponges; Http://aims.fao.org/aos/agrovoc/c_4609; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/2924 |
| |
|
| |
|
| |
|
|
| Regalado, E.L.; Laguna, A.; Martínez, J.R.. |
| Las esponjas marinas (Porifera) han atraído la atención de un gran número de científicos alrededor del mundo. Estos animales y sus simbiontes utilizan mecanismos de defensa química, basados en la producción de compuestos biologicamente activos que utlizan para protegerse de posibles depredadores. Son considerados una mina de oro para los químicos y se han descubierto más de 6000 estructuras novedosas, muchas de ellas con enormes aplicaciones biomédicas, fundamentalmente contra el cáncer, pero también contra diversas bacterias, virus y otras enfermedades. Algunos de los fármacos derivados de esponjas se encuentran disponibles en el mercado, tal es el caso Ara-A (antiviral) y de la Ara-C (antitumoral), pero existen diversos compuestos bioactivos en... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Chemical compounds; Bioactive compounds; Chemical compounds; Sponges; Http://aims.fao.org/aos/agrovoc/c_49870; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4039 |
| |
|
|
| Cachet, N.; Regalado, E.L.; Genta-Jouve, G.; Mehiri, M.; Amade, P.; Thomas, O.P.. |
| The chemical composition of the Caribbean sponge Pandaros sp. was investigated and led to the isolation of seven new steroidal glycosides namely pandarosides A-D (1, 3, 4 and 6) along with the three methyl esters of pandarosides A, C, and D (2, 5 and 7). Their structures were characterized as 3β-[β-glucopyranosyl-(1→2)-β-glucopyranosyloxyuronic acid]-16-hydroxy- 5α,14β-poriferast-16-ene-15,23-dione (1) and its methyl ester (2), 3β-[β- glucopyranosyloxyuronic acid]-16-hydroxy-5α,14β-poriferast-16-ene-15,23-dione (3), 3β-[β- glucopyranosyl-(1→2)-β-glucopyranosyloxyuronic acid]-16-hydroxy-5α,14β-cholest-16-ene- 15,23-dione (4) and its methyl ester (5), 3β-(β-glucopyranosyloxyuronic acid)-16-hydroxy- 5α,14β-cholest-16-ene-15,23-dione (6) and its methyl ester... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3859 |
| |
|
|
| Regalado, E.L.; Laguna, A.; Mendiola, J.; Thomas, O.P.; Nogueiras, C.. |
| Bioguided fractionation of Agelas cerebrum crude extract resulted in isolation of four bromopyrrole and four bromopyrrole aminoimidazole alkaloids, identified as 5-bromopyrrole-2-carboxylic acid (1), 4-bromopyrrole-2-carboxylic acid (2), 3,4-bromopyrrole-2-carboxylic acid (3), 4,5-bromopyrrole-2-carboxylic acid (4), oroidin (5), bromoageliferin (6), dibromoageliferin (7) and dibromosceptrin (8) on the basis of spectroscopic data analyses (UV, IR, HRMS, 1D and 2D NMR) and comparison with literature data. This is the first report of compounds 2 and 3 in a marine sponge belonging to the Agelas genus and the first evidence of the presence of 1 from a natural source. |
| Tipo: Journal Contribution |
Palavras-chave: Alkaloids; Sponges; Chemistry; Chemistry; Alkaloids; Sponges; Http://aims.fao.org/aos/agrovoc/c_1522; Http://aims.fao.org/aos/agrovoc/c_269; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3862 |
| |
|
|
| Regalado, E.L.; Tasdemir, D.; Kaiser, M.; Cachet, N.; Amade, P.; Thomas, O.P.. |
| The chemical composition of the Caribbean sponge Pandaros acanthifolium was reinvestigated and led to the isolation of 12 new steroidal glycosides, namely, pandarosides E-J (1-6) and their methyl esters (7-12). Their structures were determined on the basis of extensive spectroscopic analyses, including two-dimensional NMR and HRESIMS data. Like the previously isolated pandarosides A-D (13-16), the new compounds 1-12 share an unusual oxidized D-ring and a cis C/D ring junction. The absolute configurations of the aglycones were assigned by interpretation of CD spectra, whereas the absolute configurations of the monosaccharide units were determined by chiral GC analyses of the acid methanolysates. The majority of the metabolites showed in Vitro activity... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3863 |
| |
|
|
| Chaves-Fonnegra, A.; López-Victoria, M.; Parra-Velandia, F.; Zea, S.. |
| The Caribbean encrusting and excavating sponges Cliona aprica, C. caribbaea, C. delitrix and C. tenuis (Porifera, Hadromerida, Clionaidae), aggresively undermine and displace live coral tissue. At San Andrés island and Islas del Rosario (Colombian Caribbean), in all 145 observed cases of direct contact of the sponges C. aprica, C. caribbaea and C. tenuis with 17 coral species, corals showed unhealthy signs in their tissue. It was also noticed that the surface of these sponges is colonized by few organisms and that they are rarely preyed upon. To establish the possible use of chemical substances by these sponges in competition for space with corals (allelopathy), as inhibitors of larval settlement (antifouling), and as feeding deterrents against generalist... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Coral; Ecology; Competitive behaviour; Associated species; Antifouling substances; Ecology; Sponges; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1990 |
| |
|
| |
| Registros recuperados: 22 | |
|
|
|
