Results 81 to 90 of about 3,216 (152)

The early expansion and evolutionary dynamics of POU class genes. [PDF]

open access: yes, 2014
The POU genes represent a diverse class of animal-specific transcription factors that play important roles in neurogenesis, pluripotency, and cell-type specification. Although previous attempts have been made to reconstruct the evolution of the POU class,
Gates, Ruth D   +2 more
core   +1 more source

Identification and Antimicrobial Potential of Marine Sponges (Carteriospongia foliascens, Callyspongia fallax, and Paratetilla arcifera) from Kenyan Marine Waters

open access: yesInternational Journal of Microbiology, Volume 2025, Issue 1, 2025.
Emerging and re‐emerging infectious diseases and pathogens present a significant global public health threat that has led researchers to focus on discovering new antimicrobial agents in order to address the challenge. Sponges are a promising source of marine natural products, which can be used as lead molecules for drug discovery.
Teresia Nyambura Wacira   +4 more
wiley   +1 more source

Bioactivity of Spongian Diterpenoid Scaffolds from the Antarctic Sponge Dendrilla antarctica

open access: yesMarine Drugs, 2020
The Antarctic sponge Dendrilla antarctica is rich in defensive terpenoids with promising antimicrobial potential. Investigation of this demosponge has resulted in the generation of a small chemical library containing diterpenoid secondary metabolites ...
Alexandre Bory   +10 more
doaj   +1 more source

Demosponge steroid biomarker 26-methylstigmastane provides evidence for Neoproterozoic animals [PDF]

open access: yes, 2018
Sterane biomarkers preserved in ancient sedimentary rocks hold promise for tracking the diversification and ecological expansion of eukaryotes. The earliest proposed animal biomarkers from demosponges (Demospongiae) are recorded in a sequence around 100 ...
Cárdenas, Paco   +8 more
core   +1 more source

The Buds of Oscarella lobularis (Porifera, Homoscleromorpha): A New Convenient Model for Sponge Cell and Evolutionary Developmental Biology

open access: yesJournal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 342, Issue 8, Page 503-528, December 2024.
We describe a technique for triggering asexual reproduction by budding in vitro and have monitored bud development. The natural properties of Oscarella lobularis buds and the technical tools we developed make them a new biological system for getting insights into sponge molecular and cellular processes.
Caroline Rocher   +19 more
wiley   +1 more source

Bioinspiring Chondrosia reniformis (Nardo, 1847) collagen-based hydrogel: a new extraction method to obtain a sticky and self-healing collagenous material [PDF]

open access: yes, 2017
Collagen is a natural and abundant polymer that serves multiple functions in both invertebrates and vertebrates. As collagen is the natural scaffolding for cells, collagen-based hydrogels are regarded as ideal materials for tissue engineering ...
Ana Rita Duarte   +6 more
core   +2 more sources

Transcriptomic Profiling of the Allorecognition Response to Grafting in the Demosponge Amphimedon queenslandica

open access: yesMarine Drugs, 2017
Sponges, despite their simple body plan, discriminate between self and nonself with remarkable specificity. Sponge grafting experiments simulate the effects of natural self or nonself contact under laboratory conditions.
Laura F. Grice, Bernard M. Degnan
doaj   +1 more source

Vertical Transmission of a Phylogenetically Complex Microbial Consortium in the Viviparous Sponge \u3cem\u3eIrcinia Felix\u3c/em\u3e [PDF]

open access: yes, 2007
Many marine demosponges contain large amounts of phylogenetically complex yet highly sponge-specific microbial consortia within the mesohyl matrix, but little is known about how these microorganisms are acquired by their hosts.
Hentschel, Ute   +3 more
core   +1 more source

L’Argile de La Pérade : nouvelle unité marine antérieure au Wisconsinien supérieur, vallée du Saint-Laurent, Québec [PDF]

open access: yes, 1990
L'Argile de La Pérade témoigne d'un nouvel épisode marin dans la vallée du Saint-Laurent, antérieur à l'Interstade de Saint-Pierre. Le nom de Mer de Cartier est formellement proposé pour désigner cette transgression marine. La nouvelle unité marine a été
Ferland, Pierre, Occhietti, Serge
core   +1 more source

Isolation and Characterization of a Mn(II)-Oxidizing Bacillus Strain from the Demosponge Suberites domuncula

open access: yesMarine Drugs, 2010
In this study we demonstrate that the demosponge Suberites domuncula harbors a Mn(II)-oxidizing bacterium, a Bacillus strain, termed BAC-SubDo-03. Our studies showed that Mn(II) stimulates bacterial growth and induces sporulation.
Xiaohong Wang   +6 more
doaj   +1 more source

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