Search results for "cnidaria"

showing 10 items of 74 documents

On Antarctoscyphus (Cnidaria, Hydrozoa), a new genus of antarctic hydroids and the description of two new species

1997

A new genus of the hydroid family Sertulariidae is established. Several species formerly assigned to the genus Symplectoscyphus Marktanner-Turneretscher, 1890 are included. A review of those species is given, including their main features along with some remarks. Two species new to science are added; the material of those species was collected in the Scotia Sea by the Spanish Antarctic Expedition “Antartida 8611”. Present autecological data are discussed.

CnidariabiologyAntarctoscyphusEcologyHydroid (zoology)ZoologyTaxonomy (biology)General Agricultural and Biological Sciencesbiology.organism_classificationSymplectoscyphusCoelenterataScotia seaHydrozoaPolar Biology
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<strong>Review of some little-known benthic hydroids (Cnidaria, Hydrozoa) from the Southern Ocean</strong>

2015

A number of benthic hydroid species inhabiting the Southern Ocean are insufficiently characterized. A revision of eight little-known Antarctic species of the order Anthoathecata was made, based on the study of type material. Some of the species have not been recorded since their original description a century ago. Four species (Bimeria corynopsis, Bougainvillia macloviana, ?Koellikerina belgicae and Rhizorhagium antarcticum) belong to the family Bougainvilliidae, two species (Hydractinia angusta and H. dendritica) to the family Hydractiniidae, Perarella clavata to the family Cytaeididae and, finally, Rhysia halecii to the family Rhysiidae. For each species a list of synonyms, a description,…

CnidariabiologyBenthic zoneHydractiniaEcologyHydroid (zoology)Animal Science and ZoologyBougainvilliaTaxonomy (biology)biology.organism_classificationCoelenterataEcology Evolution Behavior and SystematicsHydrozoaZootaxa
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Species ofAcryptolariaNorman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacific by various French expeditions, with the descripti…

2010

Pena Cantero A. L. & Vervoort W. 2010. — Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacific by various French expeditions, with the description of nineteen new species. Zoosystema 32 (2): 267-332.

CnidariabiologyEcologyAnimal Science and ZoologyAcryptolariabiology.organism_classificationEcology Evolution Behavior and SystematicsHydrozoaZoosystema
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Breaking molds: Oswaldella laertesi, sp. nov., a unique Antarctic species of Oswaldella Stechow, 1919 (Cnidaria: Hydrozoa: Kirchenpaueriidae)

2007

A new species of the Antarctic genus Oswaldella Stechow is described and figured, and its position amongst the remaining species of the genus is discussed. The material was collected from the Ross Sea area (Antarctica) during the BioRoss survey of the western Ross Sea and Balleny Islands in 2004. Oswaldella laertesi, sp. nov., is unique amongst known species of the genus in having hydrocladia arranged in three longitudinal rows.

CnidariabiologyEcologyBiodiversityOswaldellaBiodiversityLeptothecatabiology.organism_classificationCnidariaHydrozoaBenthosGenusKirchenpaueriidaeAnimaliaAnimal Science and ZoologyOswaldella laertesiKirchenpaueriidaeEcology Evolution Behavior and SystematicsHydrozoaTaxonomy
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<p><strong>SEM study of species of <em>Oswaldella</em> Stechow, 1919 (Cnidaria, Hydrozoa, </strong><br /><stro…

2015

Oswaldella is the most speciose genus, and one of the most characteristic, of hydrozoans inhabiting the Antarctic benthic marine ecosystem. Its species have relatively many important taxonomic characters allowing for their identification. Some of them, however, are difficult to study properly with a compound microscope. With the aim of improving scientific knowledge concerning species of the genus, a SEM survey of species of Oswaldella was carried out to study key morphological characters. Fourteen out of the 27 known nominal species were considered. The study has revealed unknown important characters, such as the presence of nematothecae associated with the nematophores at the cauline apop…

CnidariabiologyPhylogeneticsZoologyOswaldellaAnimal Science and ZoologyTaxonomy (biology)Marine ecosystemKirchenpaueriidaebiology.organism_classificationEcology Evolution Behavior and SystematicsChecklistHydrozoaZootaxa
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CNIDARIAN JELLYFISH AS A NEW FOOD SOURCE. A TOOL TO CHANGE A PROBLEM TOWARDS A RESOURCE?

2022

Cnidarian jellyfish food nutraceutical antioxidant activitySettore MED/49 - Scienze Tecniche Dietetiche Applicate
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Calcification is not the Achilles'heel of cold-water corals in an acidifying ocean

2015

Ocean acidification is thought to be a major threat to coral reefs: laboratory evidence and CO2 seep research has shown adverse effects on many coral species, although a few are resilient. There are concerns that cold-water corals are even more vulnerable as they live in areas where aragonite saturation (Omega ara) is lower than in the tropics and is falling rapidly due to CO2 emissions. Here, we provide laboratory evidence that net (gross calcification minus dissolution) and gross calcification rates of three common cold-water corals, Caryophyllia smithii, Dendrophyllia cornigera, and Desmophyllum dianthus, are not affected by pCO2 levels expected for 2100 (pCO2 1058 µatm, Omega ara 1.29),…

Dissolution rateOcean Acidification International Coordination Centre (OA-ICC)TemperateIdentificationSalinityBicarbonate ion standard deviationinorganicAlkalinity total standard deviationAlkalinityExperimentTemperature waterCarbon inorganic dissolvedCalculated using seacarb after Nisumaa et al 2010Aragonite saturation stateRespiration rate oxygenAlkalinity totaltotalDesmophyllum dianthuspHRespirationTemperatureCalcification rate of calcium carbonatedissolvedLaboratory experimentCarbonate ionDeep seaPartial pressure of carbon dioxide (water) at sea surface temperature (wet air)Field experimentCarbon dioxide standard deviationTemperature water standard deviationContainers and aquaria 20 1000 L or 1 m 2Respiration rateEarth System ResearchContainers and aquaria (20-1000 L or &lt; 1 m**2)standard deviationCalcification/DissolutionPotentiometric titrationCalcite saturation statePotentiometricwaterPartial pressure of carbon dioxideCaryophyllia smithiiContainers and aquaria (20-1000 L or < 1 m**2)Dendrophyllia cornigeraFigureAragonite saturation state standard deviationBenthosCnidariaOcean Acidification International Coordination Centre OA ICCMediterranean SeaAnimaliaBicarbonate ionCalculated using seacarb after Nisumaa et al. (2010)SpeciesCalculated using CO2SYSfungiEvent labelDeep-seaPartial pressure of carbon dioxide standard deviationCarbonate system computation flagpH standard deviationCarbonate ion standard deviationbiochemical phenomena metabolism and nutritionFugacity of carbon dioxide (water) at sea surface temperature (wet air)CarbonTreatmentPartial pressure of carbon dioxide water at sea surface temperature wet airCarbon dioxideSingle speciesCalcification DissolutionFugacity of carbon dioxide water at sea surface temperature wet airBenthic animalsoxygen
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Marine Animal-Derived Compounds and Autophagy Modulation in Breast Cancer Cells

2021

It is known that in breast cancer biology, autophagy mainly plays a cytoprotective and anti-apoptotic role in vitro, being conceivably responsible for cell resistance to drug exposure and a higher metastatic attitude in vivo. Thus, the development of novel autophagy-targeting agents represents a valuable strategy to improve the efficacy of anticancer interventions. It is widely acknowledged that the enormous biodiversity of marine organisms represents a highly promising reserve for the isolation of bioactive primary and secondary metabolites targeting one or several specific molecular pathways and displaying active pharmacological properties against a variety of diseases. The aim of this re…

Drugautophagymedia_common.quotation_subjectechinodermsAutophagymolluskBiologymedicine.diseaseapoptosiIn vitroanticancer compoundbreast cancerBreast cancermarine invertebrateApoptosisIn vivoCancer researchmedicinecytotoxicityIdentification (biology)Settore BIO/06 - Anatomia Comparata E CitologiacnidarianCytotoxicitydemospongemedia_commonFoundations
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Siliceous spicules in marine demosponges (example Suberites domuncula)

2005

All metazoan animals comprise a body plan of different complexity. Since-especially based on molecular and cell biological data-it is well established that all metazoan phyla, including the Porifera (sponges), evolved from a common ancestor the search for common, basic principles of pattern formation (body plan) in all phyla began. Common to all metazoan body plans is the formation of at least one axis that runs from the apical to the basal region; examples for this type of organization are the Porifera and the Cnidaria (diploblastic animals). It seems conceivable that the basis for the formation of the Bauplan in sponges is the construction of their skeleton by spicules. In Demospongiae (w…

EXPRESSIONCnidariaSpiculeGENESPROTEINGeneral Physics and AstronomyPaleontologySponge spiculeStructural BiologyevolutionSturtian glaciationAnimalsGeneral Materials ScienceDEPOSITIONbiosilicaBody PatterningbiologyPhylumsilicateinsilica formationSPONGESCell BiologySilicon Dioxidebiology.organism_classificationCathepsinsSuberites domunculaspiculesPoriferaSuberites domunculaBody planEvolutionary biologyMORPHOGENESISSuberitesMicron
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A D-mannose-specific lectin from Gerardia savaglia that inhibits nucleocytoplasmic transport of mRNA.

1987

A new lectin has been isolated from the coral Gerardia savaglia by affinity chromatography, using locust gum as an absorbent, and D-mannose as eluant. Final purification was achieved by Bio-Gel P300 gel filtration. The agglutinin is a protein composed of two polypeptide chains with a Mr of 14800; the two subunits are not linked by disulfide bond(s). The isoelectric point is 4.8, the amino acid composition is rich in the acidic amino acids aspartic acid and glutamic acid. The absorption maximum for the protein was at 276 nm; with a molar absorption coefficient of 1.27 X 10(5) M-1 cm-1. The lectin precipitated erythrocytes from humans (A, B and O), sheep, rabbit and carp with a titer between …

ElectrophoresisPore complexCytoplasmChemical PhenomenaMacromolecular SubstancesMannoseMitosisBiochemistryChromatography Affinity03 medical and health scienceschemistry.chemical_compoundCnidariaMiceAgglutininAffinity chromatographyLectinsAnimalsLymphocytesRNA MessengerAmino Acids030304 developmental biologyGlycoproteinsCell Nucleus0303 health sciencesbiologyChemistry Physical030302 biochemistry & molecular biologyLectinNuclear ProteinsHemagglutination Inhibition TestsNuclear matrixMolecular biologyMolecular WeightIsoelectric pointBiochemistrychemistryConcanavalin Abiology.proteinMannoseEuropean journal of biochemistry
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