Results 121 to 130 of about 790 (166)

A new sponge from the Marjum Formation of Utah documents the Cambrian origin of the hexactinellid body plan. [PDF]

R Soc Open Sci
Del Mouro L, Lerosey-Aubril R, Botting J, Coleman R, Gaines RR, Skabelund J, Weaver JC, Ortega-Hernández J.   +7 more
europepmc   +1 more source

Unveiling in situ oxygen, carbon and nutrient cycling of a sponge-driven biological hotspot in the arctic. [PDF]

Sci Rep
Hanz U, Mueller B, Bart MC, Busch K, Reichart GJ, Rapp HT, de Goeij JM, Mienis F.   +7 more
europepmc   +1 more source

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Nanostructural features of demosponge biosilica

Journal of Structural Biology, 2003
Recent interest in the optical and mechanical properties of silica structures made by living sponges, and the possibility of harnessing these mechanisms for the synthesis of advanced materials and devices, motivate our investigation of the nanoscale structure of these remarkable biomaterials. Scanning electron and atomic force microscopic (SEM and AFM)
James C, Weaver, Lía I, Pietrasanta, Niklas, Hedin, Bradley F, Chmelka, Paul K, Hansma, Daniel E, Morse   +5 more
openaire   +2 more sources

Development in primary cell culture of demosponges

Journal of Biotechnology, 2003
We have established primary cell culture of the marine demosponge Dysidea avara and Suberites domuncula. Microbial contamination was controlled by the use of a pool of antibiotics confirming the goodness of this procedure. Effect of pH, temperature and light was studied to establish the better growth conditions.
De Rosa Salvatore, De Caro Salvatore, Iodice Carmine, Tommonaro Giuseppina, Stefanov Kamen, Popov Simeon   +5 more
openaire   +5 more sources

Growth Dynamics in Four Mediterranean Demosponges

Estuarine, Coastal and Shelf Science, 2001
Growth dynamics of the demosponges Crambe crambe, Hemimycale columella, Oscarella lobularis and Chondrosia reniformis were studied in the north-western Mediterranean over a 2 year period. Independent growth and shrinkage rates were quantified for first time by a newly developed photographic and computer-assisted image analysis.
M Zabala
exaly   +2 more sources

Silica Deposition in Demosponges

2003
Demosponges are the most widespread class of the phylum Porifera. They secrete siliceous (spicules) and proteinaceous (fibers) elements, which constitute the skeleton that shapes the sponge growth and allow cell organization and establishment of the aquiferous system through which the surrounding water accesses the internal cells.
Maria J, Uriz, Xavier, Turon, Mikel A, Becerro   +2 more
openaire   +2 more sources

Piwi expression in archeocytes and choanocytes in demosponges: insights into the stem cell system in demosponges

Evolution & Development, 2010
SUMMARY Little is known about the stem cells of organisms early in metazoan evolution. To characterize the stem cell system in demosponges, we identified Piwi homologs of a freshwater sponge, Ephydatia fluviatilis, as candidate stem cell (archeocyte) markers. EfPiwiA mRNA was expressed in cells with archeocyte cell morphological features.
Noriko, Funayama, Mikiko, Nakatsukasa, Kurato, Mohri, Yoshiki, Masuda, Kiyokazu, Agata   +4 more
openaire   +2 more sources

Antifouling activity of twelve demosponges from Brazil [PDF]

Brazilian Journal of Biology, 2013
Benthic marine organisms are constantly exposed to fouling, which is harmful to most host species. Thus, the production of secondary metabolites containing antifouling properties is an important ecological advantage for sessile organisms and may also provide leading compounds for the development of antifouling paints.
Guilherme Muricy, Bernardo DA GAMA
exaly   +6 more sources

Comments on a skeleton design paradigm for a demosponge

Journal of Structural Biology, 2011
The ball-shaped marine sponge Cinachyrellalevantinensis is 3-5 cm in diameter. It filters large quantities of seawater for feeding. Sponges contain numerous, hydrated, brittle amorphous SiO₂ spicules of several types that form 70-80% by weight of the sponge. We performed mechanical tests to determine the functionality of the sponge skeleton.
Y, Aluma, M, Ilan, D, Sherman
openaire   +2 more sources

Shallow waters Demosponges of the Galápagos Islands

Revue Suisse De Zoologie, 1997
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Ruth Desqueyroux-Faúndez, R. W. M. van Soest   +1 more
exaly   +4 more sources