Bryozoa from the locality Židlochovice

Two shallow boreholes on the locality Židlochovice yielded altogether 116 taxa of Bryozoa in 21 samples. Methods of their study and the determination with description of three problematic, probably new species are summarized. The study indicates that the bryozoans association from the locality Židlochovice is the most diverse among the Carpathian Foredeep.Two shallow boreholes on the locality Židlochovice yielded altogether 116 taxa of Bryozoa in 21 samples. Methods of their study and the determination with description of three problematic, probably new species are summarized. The study indicates that the bryozoans association from the locality Židlochovice is the most diverse among the Carpathian Foredeep

Bryozoans from flints in glacifluvial sediments of the North Moravia, methods of extraction and possibilities of determination

Bryozoans often occur in siliceous rocks redeposited on the area of Moravia from the North by the continental glacier. In the laboratory research various methods for separation of Bryozoa are offered and evaluated, from the not very invasive ones to the techniques most interfering the rocks including fossils. A summary of found bryozoans and their determinations are presented.Bryozoans often occur in siliceous rocks redeposited on the area of Moravia from the North by the continental glacier. In the laboratory research various methods for separation of Bryozoa are offered and evaluated, from the not very invasive ones to the techniques most interfering the rocks including fossils. A summary of found bryozoans and their determinations are presented

Early Badenian transgression on the outer flank of Western Carpathian Foredeep, Hluchov area, Czech Republic

This multidisciplinary study, based on borehole cores from the Hluchov area in Czech Republic, docu- ments an early Badenian marine transgression on the outer flank of the Western Carpathian Foredeep . The shallow-marine deposits represent coastal transgression over a terrestrial topography of weathered pre-Cenozoic bedrock. The lower facies association (FA1) consists of siliciclastic sediment derived from local substrate erosion. Facies indicate a wave-dominated environment with unstable bottom, variable rate of sediment supply and an incremental rise of relative sea level. The upper facies association (FA2) consists of carbonates indicating a major landward shift of shoreline, decline in siliciclastic input and further sea-level rise. The succession represents a transgressive to highstand systems tract. The maximum flooding surface, ca . 1 m above the FA1/FA2 boundary, is signified by an anomalous decrease in K and Th, an increased Th/K ratio and highest U concentration. The heavy-mineral assemblages in FA1 confirm local sediment provenance, whereas those in FA2 indicate broader sediment derivation, including volcanic component from contemporaneous rhyolitic to rhyodacitic eruptions. The deposits contain a wide range of marine fauna, with the foraminifers and molluscs indicating an early Badenian age. Molluscs, bryozoans and echinoderms indicate a normal-salinity environment with a decreasing hydraulic energy. Foraminifers indicate salinity fluctua- tions in the lowest part of the succession. The isotopic composition of mollusc shells shows marked inter-species differences and a general negative shift in the d 13 C and d 18 O values, indicating diagenetic alteration. The impact of diagenetic processes appears to have been controlled by sedimentary facies. The highly negative d 13 C and d 18 O values correspond to sediment layers with the highest Th/K ratios and hence low clay content. Sediment permea- bility was thus probably crucial in controlling the differential circulation and impact of diagenetic fluids

Upper Badenian sediments around Bratislava (Vienna Basin)

From surface samples (DB-1 až DB-3, obr. 1) and shallow boreholes (ZNV-1 Devínska Nová Ves a ZNV-3 Záhorská Bystrica) situated NNW from Bratislava (the Studienka Formation of the Vienna basin) we studied foraminiferal, ostracodal and bryozoans associations. All assemblages belong to Bulimina–Bolivina biozone (Upper Badenian). Studied associations indicate shallow water, normal marine environment in neritic conditions.From surface samples (DB-1 až DB-3, obr. 1) and shallow boreholes (ZNV-1 Devínska Nová Ves a ZNV-3 Záhorská Bystrica) situated NNW from Bratislava (the Studienka Formation of the Vienna basin) we studied foraminiferal, ostracodal and bryozoans associations. All assemblages belong to Bulimina–Bolivina biozone (Upper Badenian). Studied associations indicate shallow water, normal marine environment in neritic conditions

FAUNA VRTŮ HL1 A HL2 U HLUCHOVA (STŘEDNÍ MIOCÉN), PROSTĚJOVSKO

The lithological profile studied within two boreholes near Hluchov can be subdivided into three sections: in lower one occurs sandy clay with large clasts of Carboniferous rock, the medium part is characteristic by occurrence of calcareous sand and the youngest part with the most variable lithology contains calcareous sands, sandy limestones, limestones and clays. Beside bryozoans, which dominate in all sections, samples contain molluscs, foraminifers, fragments of echinoids, ostracods, otoliths, teeth of bone fishes, and fragments of spicules of sponges. Altogether 24 bryozoans species have been determined, from them five species important for palaeoecology have been described and illustrated. Palaeoecological analysis suggests mixed palaeoenvironment

Middle Pleistocene landslide on the slopes of the Drahany Highlands close to Viničné Šumice village

In 2018 an excavation of 20 × 20 m large and up to 5 m thick calcareous clays of the Langhian age was found. Rich and diversified assemblages of foraminifers with species Orbulina suturalis Brön. and Martinotiella karreri (Cush.) indicate early Badenian (in sense of the Central Paratethys regional stratigraphy) age of the sediments, zone M5b sensu Berggren et al. (1995). Variously deformed lenses and layers of fine-grained sand with several blocks of white calcareous silts and with two layers of clayey sediments with pebbles were found. The identified outcrop is part of a large landslide situated at the western margin of the Carpathian Foredeep. Samples determining the age of the landslide movements were taken from Badenian clays and from slope sediments with pebbles for study of palynomorphs. Very rich and diversified fauna was described mainly from the fine-grained sand creating layers in calcareous clays. The assemblage contained tests of foraminifers, spines of the echinoids, fragments of sponge spicules, rich fragments of molluscs and zoarias of bryozoas, worms – Ditrupa cornea (Linnaeus, 1758), Serpula sp., ?Serpulidae indet., fragments of brachiopods, arthropods, coral, ostracods, teleostei etc.The findings from the Badenian and Quaternary periods were mixed by slope movements. Large landslide in the Middle Pleistocene was the terminal gravity proces in the area of Viničné Šumice.In 2018 an excavation of 20 × 20 m large and up to 5 m thick calcareous clays of the Langhian age was found. Rich and diversified assemblages of foraminifers with species Orbulina suturalis Brön. and Martinotiella karreri (Cush.) indicate early Badenian (in sense of the Central Paratethys regional stratigraphy) age of the sediments, zone M5b sensu Berggren et al. (1995). Variously deformed lenses and layers of fine-grained sand with several blocks of white calcareous silts and with two layers of clayey sediments with pebbles were found. The identified outcrop is part of a large landslide situated at the western margin of the Carpathian Foredeep. Samples determining the age of the landslide movements were taken from Badenian clays and from slope sediments with pebbles for study of palynomorphs. Very rich and diversified fauna was described mainly from the fine-grained sand creating layers in calcareous clays. The assemblage contained tests of foraminifers, spines of the echinoids, fragments of sponge spicules, rich fragments of molluscs and zoarias of bryozoas, worms – Ditrupa cornea (Linnaeus, 1758), Serpula sp., ?Serpulidae indet., fragments of brachiopods, arthropods, coral, ostracods, teleostei etc.The findings from the Badenian and Quaternary periods were mixed by slope movements. Large landslide in the Middle Pleistocene was the terminal gravity proces in the area of Viničné Šumice

TEMPO-oxidized biodegradable bacterial cellulose (BBC) membrane coated with biologically-synthesized silver nanoparticles (AgNPs) as a potential antimicrobial agent in aquaculture (In vitro)

The emergence of drug-resistance pathogens is one of the major challenges in aquaculture. Finding an alternative remedy for diseases control is now crucial and indispensable. The present study aimed to develop different silver nanocomposite BBC membranes and verified their bactericidal activity either synergistically or independently against seven threatening aquatic pathogens (Vibrio harveyi, V. parahaemolyticus, V. alginolyticus, V. vulnificus, Aeromonas hydrophila, A. veronii and Streptococcus iniae) using membrane disc diffusion and antibacterial log reduction assays. The aqueous extract of Pseudomonas sp. was used for the synthesis of AgNPs and the composite BBC materials were characterized using FTIR, XRD, EDS, and FESEM to confirm their holding capacity of integrated AgNPs. Results evidenced that the TEMPO-oxidized BBC membrane coated with bacterial-based AgNPs exhibited an excellent crystallinity, porous properties, and strongest holding capacity. The membrane also showed potent bactericidal activity represented by wide inhibitory zones (17–20 mm), high killing ratios (95.93–99.86%). and high antibacterial log-reduction values (1.39–2.85). In conclusion, the synergism between TEMPO-oxidized BBC membrane and biologically synthesized AgNPs is an eco-friendly alternative remedy to control aquatic diseases without serious impact