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Search Results: 1 - 10 of 953 matches for " JUANA ROVIROSA "
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A novel metabolite from the Chilean mollusk Siphonaria lessoni
Rovirosa, Juana;San-Martín, Aurelio;
Química Nova , 2006, DOI: 10.1590/S0100-40422006000100011
Abstract: a new and two previously known metabolites possessing a polypropionate carbon skeleton have been isolated from the marine gastropod mollusk siphonaria lessoni, collected at chilean coasts. their structures have been determined by spectroscopical methods.
A novel metabolite from the Chilean mollusk Siphonaria lessoni
Rovirosa Juana,San-Martín Aurelio
Química Nova , 2006,
Abstract: A new and two previously known metabolites possessing a polypropionate carbon skeleton have been isolated from the marine gastropod mollusk Siphonaria lessoni, collected at Chilean coasts. Their structures have been determined by spectroscopical methods.
SECONDARY METABOLITES FROM MARINE PENICILLIUM BREVICOMPACTUM
JUANA ROVIROSA,ANA DIAZ-MARRERO,JOSE DARIAS,KARIN PAINEMAL
Journal of the Chilean Chemical Society , 2006,
Abstract: In a screening of Basidiomycete cultures isolated from marine invertebrates collected along the Chilean coastline for the production of antibiotics we identified a Penicillium brevicompactum strain as a producer of metabolites inhibiting the growth of bacteria and fungi. Bioactivity guided purification resulted in the isolation of four known metabolites. Their structures were elucidated by spectroscopic methods
SECONDARY METABOLITES FROM MARINE PENICILLIUM BREVICOMPACTUM
ROVIROSA,JUANA; DIAZ-MARRERO,ANA; DARIAS,JOSE; PAINEMAL,KARIN; SAN MARTIN,AURELIO;
Journal of the Chilean Chemical Society , 2006, DOI: 10.4067/S0717-97072006000100004
Abstract: in a screening of basidiomycete cultures isolated from marine invertebrates collected along the chilean coastline for the production of antibiotics we identified a penicillium brevicompactum strain as a producer of metabolites inhibiting the growth of bacteria and fungi. bioactivity guided purification resulted in the isolation of four known metabolites. their structures were elucidated by spectroscopic methods
NEW BUTYROLACTONE FROM A MARINE-DERIVED FUNGUS ASPERGILLUS SP
AURELIO SAN-MARTíN,JUANA ROVIROSA,INMACULADA VACA,KAREN VERGARA
Journal of the Chilean Chemical Society , 2011,
Abstract: Four compounds that belong to two structure types, namely dibenzylbutyrolactone and sesterterpenoids, were obtained from the extract of the strain Aspergillus sp. (2P-22), isolated from a marine sponge, Cliona chilensis. Among them, compound 1 was identified as new, namely butylrolactone-VI. The structures of these compounds were characterized on the basis of spectroscopic data. Biological activities of these fungal metabolites, are described.
Anti-Proliferative Activity of Meroditerpenoids Isolated from the Brown Alga Stypopodium flabelliforme against Several Cancer Cell Lines
David M. Pereira,Jose Cheel,Carlos Areche,Aurelio San-Martin,Juana Rovirosa,Luis R. Silva,Patricia Valentao,Paula B. Andrade
Marine Drugs , 2011, DOI: 10.3390/md9050852
Abstract: The sea constitutes one of the most promising sources of novel compounds with potential application in human therapeutics. In particular, algae have proved to be an interesting source of new bioactive compounds. In this work, six meroditerpenoids (epitaondiol, epitaondiol diacetate, epitaondiol monoacetate, stypotriol triacetate, 14-ketostypodiol diacetate and stypodiol) isolated from the brown alga Stypopodium flabelliforme were tested for their cell proliferation inhibitory activity in five cell lines. Cell lines tested included human colon adenocarcinoma (Caco-2), human neuroblastoma (SH-SY5Y), rat basophilic leukemia (RBL-2H3), murine macrophages (RAW.267) and Chinese hamster fibroblasts (V79). Antimicrobial activity of the compounds was also evaluated against Staphylococcus aureus, Salmonella typhimurium, Proteus mirabilis, Bacillus cereus, Enterococcus faecalis and Micrococcus luteus. Overall, the compounds showed good activity against all cell lines, with SH-SY5Y and RAW.267 being the most susceptible. Antimicrobial capacity was observed for epitaondiol monoacetate, stypotriol triacetate and stypodiol, with the first being the most active. The results suggest that these molecules deserve further studies in order to evaluate their potential as therapeutic agents.
NEW BUTYROLACTONE FROM A MARINE-DERIVED FUNGUS ASPERGILLUS SP
SAN-MARTíN,AURELIO; ROVIROSA,JUANA; VACA,INMACULADA; VERGARA,KAREN; ACEVEDO,LAURA; VI?A,DOLORES; ORALLO,FRANCISCO; CHAMY,MARíA CRISTINA;
Journal of the Chilean Chemical Society , 2011, DOI: 10.4067/S0717-97072011000100023
Abstract: four compounds that belong to two structure types, namely dibenzylbutyrolactone and sesterterpenoids, were obtained from the extract of the strain aspergillus sp. (2p-22), isolated from a marine sponge, cliona chilensis. among them, compound 1 was identified as new, namely butylrolactone-vi. the structures of these compounds were characterized on the basis of spectroscopic data. biological activities of these fungal metabolites, are described.
STEROIDS FROM THE MARINE FUNGUS GEOTRICHUM SP
SAN-MARTíN,AURELIO; OREJARENA,SILVIA; GALLARDO,CLAUDIA; SILVA,MARIO; BECERRA,JOSé; REIN0S0,RODRIGO; CHAMY,MARIA C; VERGARA,KAREN; ROVIROSA,JUANA;
Journal of the Chilean Chemical Society , 2008, DOI: 10.4067/S0717-97072008000100011
Abstract: ergosterol 1, peroxyergosterol 2, ergosta-4,6,8(14), 22-tetraen-3-one 3 and 24-ethyl-cholesta-4-ene-3-one 4 were isolated from the cultures of a fungus geotrichum sp. obtained from a marine sediment. it was established that no other sterols were present in the extract. their structures were elucidated by spectroscopic methods
Paleotelevisión, neotelevisión y metatelevisión en las series dramáticas estadounidenses PaleoTV, NeoTV and MetaTV in US Drama Series
Anna Tous Rovirosa
Comunicar , 2009, DOI: doi:10.3916/c33-2009-03-009
Abstract: Este artículo analiza las características paleotelevisivas, neotelevisivas y metatelevisivas de las series de ficción estadounidenses contemporáneas pertenecientes al género dramático y a los subgéneros de aventuras ( Perdidos ), policíaco ( CSI: Las Vegas ) y político ( El ala oeste de la Casa Blanca ). El objeto de la investigación consiste en estudiar dichas series televisivas estadounidenses dramáticas en relación a las tres eras que dividen la breve historia de la televisión hasta la actualidad, con la finalidad de detectar las características definitorias del medio en la serialidad de ficción y su relación con su propia diacronía. La metodología parte de los conceptos teóricos trabajados por varios estudiosos. Se destacan la autorreferencialidad y la intertextualidad como algunas de las características metatelevisivas predominantes, y se analiza la transmisión ideológica en dichas series. This paper analyses the paleoTV, neoTV and metaTV features in three US drama series belonging to drama series genres and adventure subgenres: adventures ( Lost ), crime ( CSI: Crime Scene Investigation ) and politics ( The West Wing ). The aim of the research is to study these TV series in relation to the three eras which divide the short history of TV up to today, to determine the features that define this media in serial fiction and its relation to its own diachronic moment. The methodology of this work is based on the concepts of several scholars and makes references to other US fiction series. It emphasizes the autoreferenciality and intertextuality as some of metaTV’s most important features.
Reality and fiction in US TV series: Lost, CSI and The West Wing. Narrative strategies and verosimilitude
Anna Tous Rovirosa
Contemporanea : Revista de Comunica??o e Cultura , 2010,
Abstract: The purpose of this paper is to present a methodology of analysis of TV series, taking into account the use of reality and fiction in the narrative construction of these series, as well as the use of verosimilitude in real-world series. With the methodology chosen, the purpose is to distinguish between the usage of reality and fiction, on one hand, and the usage of thematic recurrence, myth and metaTV references, on the other. The methodology consists of the edition of televisual text. For, inasmuch as we consider that drama series are a text, they can be edited. The empirical analysis deals with three US TV series: Lost, ABC: 2004-, CSI: Crime Scene Investigation, CBS: 2000- and The West Wing, NBC: 1999-2006. They all belong to the drama s era, but each of them represents a specific subgenre: adventures and science-fiction, crime and forensic, and workplace and politics.
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