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Showing 1 to 20 of 101 for “"Sponges"”.
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Bimetallic Nanoporous Sponges
Nanoporous silver (np-S) is a promising nanomaterial with unique physical properties distinct from its bulk counterpart, including high surface area, enhanced chemical sensing and tuneable optical and electrical properties. This thesis explores the fabrication and characterisation of np-S thin …
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Biologically Active Compounds From Caribbean Sponges
… 1,2 dioxane acids and esters from two caribbean sponges is described. Interest in these compounds was motivated by the acid's pharmacological activities when tested in vitro against various gram positive bacteria, yeasts and fungi. The corresponding esters were relatively inactive as …
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The Contractile System of Marine Sponges
Made available in DSpace on 2014-12-09T23:33:51Z (GMT). No. of bitstreams: 1 6503171.pdf: 7505298 bytes, checksum: b7d6a032b3d09976f65ebf1c6823a702 (MD5) Previous issue date: 1964
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Microbiology of marine sponges: from community structure to symbiont function
Marine sponges are filter-feeding metazoans that can host complex microbial communities which comprise as much as 35% of total sponge biomass. In this thesis I have employed high-throughput, next-generation sequencing technologies to study the sponge microbiota at two different scales. Firstly, I …
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Cellular and molecular characterisation of regeneration in calcareous sponges and soft corals
… soft corals from the genus Xenia and calcareous sponges from the genus Sycon. Cnidarians, which include corals, sea anemone, and jellyfish, are renowned for their remarkable regenerative abilities. Occupying a key phylogenetic position as the sister group to Bilateria, cnidarians offer crucial …
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Cellular and molecular characterisation of regeneration in calcareous sponges and soft corals
… soft corals from the genus Xenia and calcareous sponges from the genus Sycon. Cnidarians, which include corals, sea anemone, and jellyfish, are renowned for their remarkable regenerative abilities. Occupying a key phylogenetic position as the sister group to Bilateria, cnidarians offer crucial …
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Antiviral, Cytotoxic and Antimicrobial Compounds From Marine Sponges and Algae (Biological Activity)
The antiviral and antimicrobial compounds sceptrin, oxysceptrin, bromosceptrin, debromosceptrin, dibromosceptrin and debromooxysceptrin have been isolated from the sponge Agelas mauritiana and their structures have been determined by spectroscopic means. Syntheses of model compounds for some of the …
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Multiscale Structures and Mechanics of Biomineralized Lattices in Hexactinellid sponges and Echinoderms
… groups of marine animals (i.e., Hexactinellid sponges and Echinoderms) for systematic structural-mechanical study. Their biomineralized lattice skeletons exhibit three representative types of multiscale structures: 1) multiscale hierarchical structure: skeleton of Hexactinellid sponge such as …
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Inducible Chemical Defenses in Temperate Reef Sponges of the South Atlantic Bight, U.S.A.
… these defenses. To investigate if reef sponges in the South Atlantic Bight employ inducible chemical defenses, I tested two predictions with Ircinia campana, I. felix, and Aplysina fulva. First, concentrations of antipredator compounds should covary with the abundance of sponge …
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Development of a liquid starter for cracker sponges and factors affecting cracker flour quality
Typescript (photocopy).
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Chemical studies of metabolites from Pacific Ocean marine sponges and the starfish Dermasterias imbricata
… active extracts of several Pacific Ocean marine sponges has led to the isolation of eight new and nine previously known natural products. The structures of the compounds were determined by a combination of spectroscopic data analysis and chemical interconversions. In addition, the partial …
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Isolation and structure elucidation of bioactive secondary metabolites from marine sponges and sponge-derived fungi
… the search for bioactive compounds from marine sponges and sponge-associated fungi, this research work resulted to the isolation of twenty-six compounds, eight of which are new metabolites. The sponges were collected from the Indo-pacific regions, particularly those from Indonesian and …
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The Synthesis Of High Surface Area Ti Sponges By Halide Conversion Process For Capacitor Anodes
… the conversion process to obtain open-porous Ti sponges. By changing the reduction temperature and time of the conversion process, Ti sponges with different particle sizes were obtained. A model of Ti sponge formation during the conversion process is proposed. The sponge samples were additionally …
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The Hydrogel Reimagined: Gel-Derived Sponges and Sheets as Absorbents for Water, Blood, and Oil
… gels in very different physical forms: as soft sponges or foldable, fabric-like sheets. We want these macroscale dry materials to retain the ability to absorb large amounts of liquid, either aqueous or organic. In short, we would like to make polymer gels in convenient, usable forms similar to …
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Are Chemical Defenses Allocated within Sponges to Defend Regions Most at Risk to Predator Attack?
The allocation of chemical defenses to regions most at risk to predator attack may provide adequate protection at minimal metabolic cost. This study examined chemical defense allocation within three sponge species from a temperate reef by investigating the predictions that: concentrations of …
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Effects of modulus of elasticity of collagen sponges on their cell-mediated contraction in vitro
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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A pilot study evaluating the effect of collagen sponges on healing and pain following tooth extraction
… toss. The experimental groups received collagen sponges while the control groups received extraction only. All patients documented their pain experience in provided journals. In addition, calibrated examiners measured the wound margin closure via photographs of the extraction socket with a …
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Utilization of Captor sponges to maintain nitrification and denitrification in BNR activated sludge at low aerobic MCRTs
The performance of Captor media integration into the aerobic zone of an activated sludge wastewater treatment system operated at low MCRTs was evaluated using a pilot scale Virginia Initiative Project (VIP) process. Two separate trains were operated, one with Captor media incorporated into the …
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