Results 51 to 60 of about 4,495 (224)

Four replacement names in fossil demosponges (Porifera: Demospongiae)

open access: yesRevista Brasileira de Paleontologia, 2022
The following replacement names in fossil Demospongiae are proposed: Trinacriarbuscula Ceccolini & Cianferoni nom. nov. = Arbuscula Parona, 1933 nec Bolivar, 1905; Iberogilletia Ceccolini & Cianferoni nom. nov. = Gilletia Lagneau-Herenger, 1962 nec Benderitter, 1923; Teutomastophorus Ceccolini & Cianferoni nom. nov.
Filippo Ceccolini, Fabio Cianferoni
openaire   +3 more sources

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

Determination of the Halogenated Skeleton Constituents of the Marine Demosponge Ianthella basta

open access: yesMarine Drugs, 2017
Demosponges of the order Verongida such as Ianthella basta exhibit skeletons containing spongin, a collagenous protein, and chitin. Moreover, Verongida sponges are well known to produce bioactive brominated tyrosine derivatives.
Susanne Ueberlein   +3 more
doaj   +1 more source

Compositional and Quantitative Insights Into Bacterial and Archaeal Communities of South Pacific Deep-Sea Sponges (Demospongiae and Hexactinellida)

open access: yesFrontiers in Microbiology, 2020
In the present study, we profiled bacterial and archaeal communities from 13 phylogenetically diverse deep-sea sponge species (Demospongiae and Hexactinellida) from the South Pacific by 16S rRNA-gene amplicon sequencing.
Georg Steinert   +17 more
doaj   +1 more source

Molecular evolution of rDNA in early diverging Metazoa [PDF]

open access: yes, 2008
Background: The cytoplasmic ribosomal small subunit (SSU, 18S) ribosomal RNA (rRNA) is the most frequently-used gene for molecular phylogenetic studies.
Erpenbeck, Dirk   +2 more
core   +1 more source

Taxonomical and biogeographical notes on the sponges of the Strait of Magellan

open access: yesScientia Marina, 1999
The sponge material from the Straits of Magellan collected by the research vessels Cariboo in 1991 and Victor Hensen in 1994, and by a shallow water diving team, were studied.
Maurizio Pansini, Michele Sará
doaj   +1 more source

Inhibitory Effect of Aqueous Extracts from Marine Sponges on the Activity and Expression of Gelatinases A (MMP-2) and B (MMP-9) in Rat Astrocyte Cultures. [PDF]

open access: yesPLoS ONE, 2015
The aim of this study was to evaluate whether water soluble compounds present in aqueous extracts from seven Mediterranean demosponges exert biological activity towards matrix metalloproteinases (MMPs), which represent important pathogenic factors of ...
Gaetano Di Bari   +6 more
doaj   +1 more source

Microbial communities and bioactive compounds in marine sponges of the family Irciniidae-a review [PDF]

open access: yes, 2014
Marine sponges harbour complex microbial communities of ecological and biotechnological importance. Here, we propose the application of the widespread sponge family Irciniidae as an appropriate model in microbiology and biochemistry research. Half a gram
Anand   +136 more
core   +2 more sources

Ediacara biota flourished in oligotrophic and bacterially dominated marine environments across Baltica. [PDF]

open access: yes, 2018
Middle-to-late Ediacaran (575-541 Ma) marine sedimentary rocks record the first appearance of macroscopic, multicellular body fossils, yet little is known about the environments and food sources that sustained this enigmatic fauna.
Bekker, Andrey   +7 more
core   +3 more sources

Naturally Drug-Loaded Chitin: Isolation and Applications

open access: yesMarine Drugs, 2019
Naturally occurring three-dimensional (3D) biopolymer-based matrices that can be used in different biomedical applications are sustainable alternatives to various artificial 3D materials.
Valentine Kovalchuk   +21 more
doaj   +1 more source

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