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  • 1
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    Chapter Tungsten Nanoparticles Produced by Magnetron Sputtering Gas Aggregation: Process Characterization and Particle Properties (2021)
    InTechOpen
    Details
    Publication Date: 2024-04-04
    Description: Tungsten and tungsten nanoparticles are involved in a series of processes, in nanotechnology, metallurgy, and fusion technology. Apart from chemical methods, nanoparticle synthesis by plasma offers advantages as good control of size, shape, and surface chemistry. The plasma methods are also environmentally friendly. In this chapter, we present aspects related to the magnetron sputtering gas aggregation (MSGA) process applied to synthesis of tungsten nanoparticles, with size in the range of tens to hundreds of nanometers. We present the MSGA process and its peculiarities in the case of tungsten nanoparticle synthesis. The properties of the obtained particles with a focus on the influence of the process parameters over the particle production rate, their size, morphology, and structure are discussed. To the end, we emphasize the utility of such particles for assessing the environmental and biological impacts in case of using tungsten as wall material in thermonuclear fusion reactors.
    Keywords: tungsten, nanoparticles, gas aggregation, nanoparticle synthesis, tungsten nanoparticle properties, fusion technology, toxicology of nanoparticles, tritium retention ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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  • 2
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    Impact of climate upon the hydrology of a small polar glacier - Austrelovenbreen (79° N, Svalbard) (2008)
    In:  EPIC3HYDROLOGY IN THE ARCTIC CLIMATE, 16TH-18TH JUNE 2008 UNIS, LONGYEARBYEN, SVALBARD.
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 3
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    Isolation, identification and characterization of Lactobacillus species from fermented locust bean (Parkia biglobosa) for use as probiotics in the aquaculture industry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24166 | 19325 | 2018-05-13 18:40:22 | 24166 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Probiotics are a promising feed additive to stimulate animal growth and secure a low disease response in aquaculture industry where there are high stocking densities in shrimp and fish production. Fermented locust beans (Parkia biglobosa) are known to be rich in protein and used as food condiment. Probiotic bacteria were isolated from this locally available food material. Culture and characterizations of isolates were carried out. Sugar fermentation patterns were determined by using an API 50 CHL system and incubation were performed anaerobically at 37~'C. MRS broth culture grown at 37~'C overnight was added to 9ml of MRS Agar and the bacteria were incubated at 37~'C for 24 and 48 hrs. Discrete and single colony of lactobacillus was isolated using colony morphology and biochemical tests. The most significant viable taxa isolated was Lactobacillus fermentum at a pH range of (3.0-8.0), while the least viable taxa isolated was Leuconostoc mesenteroides ssp. Microscopically they were Grampositive, rod shaped, non- motile, catalase negative and absence of Endospore.
    Description: Includes: 2 tables and 2 plates.;Also includes: 15 references.
    Keywords: Aquaculture ; Nigeria ; Lagos ; Locust bean ; Probiotics ; Lactobacillus ; Probiotics ; freshwater environment ; Feed ; Additives ; Aquaculture ; Microorganisms ; Bacteria ; Disease resistance ; Fermented products ; Fish culture ; Shrimp culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 60-63
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  • 4
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    Improvement of snow physical parameters retrieval using SAR data in the Arctic (Svalbard) (2018)
    In:  EPIC3ISSW 2018 Innsbruck
    Details
    Publication Date: 2021-08-25
    Description: Arctic snow cover dynamics offer a changing face in terms of temporal duration and water equivalent, due to recent climate change conditions (Callaghan et al., 2011; Lemke & Jacobi, 2011). In this context, innovative methods are helpful to enhance management of the snow-pack resource for climate research, hydrology and human activities. The characteristics of Arctic snow are different from “temperate” snow (i.e. the Alps), in terms of thickness, internal structure, thermal conductivity, and metamorphism. Ground observation often indicates wind slab at the snow surface, internal rounded grains, depth hoar at the bottom, and often internal ice layer or at the interface with ground surface (Dominé et al., 2016). This work is part of the “Precip-A2” project (OSUG, Grenoble-France), focusing on snow and its interaction with the atmosphere, especially in terms of chemistry, radiative processes and precipitation. The the focused area is Ny-Ålesund, Svalbard, Norway (N 78°55’ / E 11° 55’). One subtask of the project is dedicated to X-band radar measurements (ground and spaceborne) to retrieve physical properties of arctic snow. Active radar (SAR) images are used in this project, as they do not suffer of clouds coverage and polar night, unlike optical sensors. Snow mapping at the melting season is well documented, due to the liquid water content at the snow surface (Nagler et al., 2000), dry snow height retrieval is only possible at the moment under the full polarimetric mode of the Radarsat-2 satellite, Canada (Dedieu et al., 2014; 2017).The aims of our specific task is to improve an innovative and recent method to retrieve snow depth from SAR image decomposition (Leinss, 2014), and to validate the output results with a consistent ground network, including a large international partnership (Fr, De, No, It). A set of 10 SAR images was provided by the German Space Agency (DLR) during winter 2017 from the TerraSAR-X sensor (3.1 cm, 9.6 GHz) in dual co-pol HH, VV (2.5 m resolution). Descending and ascending orbits were combined under 35-38° incidence angles, to avoid topographic constraints. The data were processed with a co-polar phase difference (CPD) set between HH and VV polarization, then projected to ground range by DEM from the Norwegian Polar Institute (5m resolution). A total of 400 ground measurements were used for validation, based on automatic permanent stations or manual collection. Snow height, temperature, density, and some structural information (stratigraphy) were observed on open spaces (herb tundra) and on glaciers. Some places are well documented within 20-year recording, as the Bayelva station (Boike et al., 2018) or the Austre Lovenbreen glacier (Bernard et al., 2015). Results show that the temporal evolution of the CPD values is strongly linked with the in-situ snow evolution: positive values for dry snow, negative values for recrystallization process. The best R2 correlation performances between estimated and measured snow depth are ranging from 0.51 to 0.75, assessing the interest of this method for snow mapping and hydrological application.
    Repository Name: EPIC Alfred Wegener Institut
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  • 5
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    Impact of recent climate change in the Arctic on snow physicalparameters retrieval using SAR data (Svalbard) (2019)
    In:  EPIC3EGU General Assembly 2019, Vienna, Austria, 2019-04-07-2019-04-12
    Details
    Publication Date: 2021-08-25
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 6
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    Fungal Planet description sheets: 785– 867 (2018)
    Naturalis Biodiversity Center
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 41, pp. 238-417
    Details
    Publication Date: 2024-04-02
    Description: Novel species of fungi described in this study include those from various countries as follows: Angola, Gnomoniopsis angolensis and Pseudopithomyces angolensis on unknown host plants. Australia, Dothiora corymbiae on Corymbia citriodora, Neoeucasphaeria eucalypti (incl. Neoeucasphaeria gen. nov.) on Eucalyptus sp., Fumagopsis stellae on Eucalyptus sp., Fusculina eucalyptorum (incl. Fusculinaceae fam. nov.) on Eucalyptus socialis, Harknessia corymbiicola on Corymbia maculata, Neocelosporium eucalypti (incl. Neocelosporium gen. nov., Neocelosporiaceae fam. nov. and Neocelosporiales ord. nov.) on Eucalyptus cyanophylla, Neophaeomoniella corymbiae on Corymbia citriodora, Neophaeomoniella eucalyptigena on Eucalyptus pilularis, Pseudoplagiostoma corymbiicola on Corymbia citriodora, Teratosphaeria gracilis on Eucalyptus gracilis, Zasmidium corymbiae on Corymbia citriodora. Brazil, Calonectria hemileiae on pustules of Hemileia vastatrix formed on leaves of Coffea arabica, Calvatia caatinguensis on soil, Cercospora solani-betacei on Solanum betaceum, Clathrus natalensis on soil, Diaporthe poincianellae on Poincianella pyramidalis, Geastrum piquiriunense on soil, Geosmithia carolliae on wing of Carollia perspicillata, Henningsia resupinata on wood, Penicillium guaibinense from soil, Periconia caespitosa from leaf litter, Pseudocercospora styracina on Styrax sp., Simplicillium filiforme as endophyte from Citrullus lanatus, Thozetella pindobacuensis on leaf litter, Xenosonderhenia coussapoae on Coussapoa floccosa. Canary Islands (Spain), Orbilia amarilla on Euphorbia canariensis. Cape Verde Islands, Xylodon jacobaeus on Eucalyptus camaldulensis. Chile, Colletotrichum arboricola on Fuchsia magellanica. Costa Rica, Lasiosphaeria miniovina on tree branch. Ecuador, Ganoderma chocoense on tree trunk. France, Neofitzroyomyces nerii (incl. Neofitzroyomyces gen. nov.) on Nerium oleander. Ghana, Castanediella tereticornis on Eucalyptus tereticornis, Falcocladium africanum on Eucalyptus brassiana, Rachicladosporium corymbiae on Corymbia citriodora. Hungary, Entoloma silvae-frondosae in Carpinus betulus-Pinus sylvestris mixed forest. Iran, Pseudopyricularia persiana on Cyperus sp. Italy, Inocybe roseascens on soil in mixed forest. Laos, Ophiocordyceps houaynhangensis on Coleoptera larva. Malaysia, Monilochaetes melastomae on Melastoma sp. Mexico, Absidia terrestris from soil. Netherlands, Acaulium pannemaniae, Conioscypha boutwelliae, Fusicolla septimanifiniscientiae, Gibellulopsis simonii, Lasionectria hilhorstii, Lectera nordwiniana, Leptodiscella rintelii, Parasarocladium debruynii and Sarocladium dejongiae (incl. Sarocladiaceae fam. nov.) from soil. New Zealand, Gnomoniopsis rosae on Rosa sp. and Neodevriesia metrosideri on Metrosideros sp. Puerto Rico, Neodevriesia coccolobae on Coccoloba uvifera, Neodevriesia tabebuiae and Alfaria tabebuiae on Tabebuia chrysantha. Russia, Amanita paludosa on bogged soil in mixed deciduous forest, Entoloma tiliae in forest of Tilia × europaea, Kwoniella endophytica on Pyrus communis. South Africa, Coniella diospyri on Diospyros mespiliformis, Neomelanconiella combreti (incl. Neomelanconiellaceae fam. nov. and Neomelanconiella gen. nov.) on Combretum sp., Polyphialoseptoria natalensis on unidentified plant host, Pseudorobillarda bolusanthi on Bolusanthus speciosus, Thelonectria pelargonii on Pelargonium sp. Spain, Vermiculariopsiella lauracearum and Anungitopsis lauri on Laurus novocanariensis, Geosmithia xerotolerans from a darkened wall of a house, Pseudopenidiella gallaica on leaf litter. Thailand, Corynespora thailandica on wood, Lareunionomyces loeiensis on leaf litter, Neocochlearomyces chromolaenae (incl. Neocochlearomyces gen. nov.) on Chromolaena odorata, Neomyrmecridium septatum (incl. Neomyrmecridium gen. nov.), Pararamichloridium caricicola on Carex sp., Xenodactylaria thailandica (incl. Xenodactylariaceae fam. nov. and Xenodactylaria gen. nov.), Neomyrmecridium asiaticum and Cymostachys thailandica from unidentified vine. USA, Carolinigaster bonitoi (incl. Carolinigaster gen. nov.) from soil, Penicillium fortuitum from house dust, Phaeotheca shathenatiana (incl. Phaeothecaceae fam. nov.) from twig and cone litter, Pythium wohlseniorum from stream water, Superstratomyces tardicrescens from human eye, Talaromyces iowaense from office air. Vietnam, Fistulinella olivaceoalba on soil. Morphological and culture characteristics along with DNA barcodes are provided.
    Keywords: Ecology ; Evolution ; Behavior and Systematics ; ITS nrDNA barcodes ; LSU ; new taxa ; systematics
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 7
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    Tsunami hazard assessment based on deterministic and probabilistic methods (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-07-13
    Description: At the NOAA Center for Tsunami Research (NCTR), we usually consider two types, short-term and long-term, tsunami hazard assessments. The goal of a short-term hazard assessment is to address real- or near-real-time forecasting of tsunami inundation caused by a specific event in progress. Examples of the short-term hazard assessment include the flooding forecast capability based on the DART data assimilation, and the quick flooding model forecast in the near field assembled during a progressive tsunami. A long-term tsunami hazard assessment, however, is the use of the best-available high-resolution model to identify the long-term, potential impact of tsunami hazards for a coastal community at risk. It is usually based on well-established knowledge of history of the tsunami impact at an interested site. NCTR’s tsunami modeling capability is well recognized in many tsunami hazard assessment projects (Figure 1) that are supported domestically by state and federal stakeholders in the United States, as well as internationally through the United Nations’ Intergovernmental Oceanographic Commission (IOC). In this study, we highlight NCTR’s research in short- and long-term tsunami hazard assessments using both the deterministic and the probabilistic methods, along with a path of two-decade development of deep-ocean observational and modeling technologies within and outside NOAA. These efforts have largely contributed to tsunami inundation forecasting at the NOAA’s Tsunami Warning Centers (TWCs), the National Tsunami Hazard Mitigation Program (NTHMP)’s goal of Tsunami-Ready societies, and as well to the establishment of first national and international provision on tsunami load and effect.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 8
    Electronic Resource
    Electronic Resource
    Preparation and Reductive Cyclization of Some Carbon-Alkylated Derivatives of Ethyl 3-Nitro-2-thienylpyruvate1 (1964)
    s.l. : American Chemical Society
    The @journal of organic chemistry 29 (1964), S. 2165-2168 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01031a013
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  • 9
    Electronic Resource
    Electronic Resource
    Reductions with Metal Hydrides. XIV. Reduction of 2-Tetrahydropyranyl and 2-Tetrahydrofuranyl Ethers (1965)
    s.l. : American Chemical Society
    The @journal of organic chemistry 30 (1965), S. 2441-2447 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01018a082
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  • 10
    Electronic Resource
    Electronic Resource
    Reductions with Metal Hydrides. XV. Reduction of 2-Tetrahydropyranyl and 2-Tetrahydrofuranyl Thioethers with Lithium Aluminum Hydride- Aluminum Chloride (1965)
    s.l. : American Chemical Society
    The @journal of organic chemistry 30 (1965), S. 2448-2450 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01018a083
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