426 research outputs found
EMODnet physics: towards an European impulsive noise register
EMODnet Physics, one of the European Marine Observation and Data network thematic portals, which is is currently providing access physical parameters of the oceans, has recently started working on water noise with the aim of making available more operational data (in terms of parameters and format that are close to MSFD I.11 requirements), offer a single European entry point to impulsive noise registries (MSFD I.11.1) and work on (regional) sound maps.Peer Reviewe
EMODnet: your gateway to marine data in Europe
Peer Reviewe
New approach to underwater technologies for innovative, low-cost ocean observation (nautilos): operational field primary capture system
The large variety of platforms and sensors globally deployed and available, allows access to a conspicuous quantity of data and variables with heterogeneous formats and scales. In the last decades governments and the scientific world have encouraged standardizations and best practices for data collection, elaboration and distribution. Several initiatives had led the bases for globally shared practices and quality indexes. This paper aims at giving a state of the art concerning the existing best practices and quality indices of the most important platforms, initiatives and projects for the scope of NAUTILOS - New Approach to Underwater Technologies for Innovative, Low-cost Ocean observation - H2020 project (www.nautilosh-2020.eu; ct. 101000825)info:eu-repo/semantics/publishedVersio
EMODnet physics and river runoff data management
Rivers runoff exert a strong influence in their neighbouring coastal area in several ways, modifying the water stratification, introducing significant fluctuations in circulation patterns and modulating the impact of upwelling events. This paper presents data management methods and standards to make harmonised river data available and accessible.Peer Reviewe
EMODnet physics and river runoff data management
Rivers runoff exert a strong influence in their neighbouring coastal area in several ways, modifying the water stratification, introducing significant fluctuations in circulation patterns and modulating the impact of upwelling events. This paper presents data management methods and standards to make harmonised river data available and accessible.Peer Reviewe
Thiazolidin-4-one formation. Mechanistic and synthetic aspects of the reaction of imines and mercaptoacetic acid under microwave and conventional heating
Microwave irradiation of a mixture of benzylidene-anilines and mercaptoacetic acid in benzene gives 1,3-thiazolidin-4- ones in very high yield (65–90%), whereas the same reaction performed through using the conventional method, at refluxtemperature, requires a much longer time and gives a much lower yield (25–69%). This difference seems to be due to someintermediates and by-products formed during the conventional reaction. On the basis of 1H NMR studies, two differentmechanisms, acting in benzene and in DMF, respectively, have been hypothesized for the thiazolidin-4-one system
formation
Antitumor Agents. 5. Synthesis, Structure-Activity Relationships, and Biological Evaluation of Dimethyl-5H-pyridophenoxazin-5-ones, Tetrahydro-5H-benzopyridophenoxazin-5-ones, and 5H-Benzopyridophenoxazin-5-ones with Potent Antiproliferative Activity
New antiproliferative compounds, dimethyl-5H-pyrido[3,2-a]phenoxazin-5-ones (1-6), tetrahydro-5Hbenzopyrido[ 2,3-j]phenoxazin-5-ones (7-9), and 5H-benzopyrido[3,2-a]phenoxazin-5-ones (10-12) were synthesized and evaluated against representative human neoplastic cell lines. Dimethyl derivatives 1-6 were more active against carcinoma than leukemia cell lines. The tetrahydrobenzo derivatives 7-9 were scarcely active, whereas the corresponding benzo derivatives 10-12 showed notable cytotoxicity against a majority of the tested cell lines. Molecular modeling studies indicated that the high potency of 10 and 11, the most cytotoxic compounds of the whole series, could be due to the position of the condensed benzene ring, which favors Ă°-Ă° stacking interactions with purine and pyrimidine bases in the DNA active site. Biological studies suggested that 10-12 have no effect on human topoisomerases I and II and that they induce arrest at the G2/M phase
Antitumor Agents 6. Synthesis, Structure-Activity Relationships, and Biological Evaluation of Spiro[imidazolidine-4,3′-thieno[2,3-g]quinoline]-tetraones and Spiro[thieno[2,3-g]quinoline-3,5′- [1,2,4]triazinane]-tetraones with Potent Antiproliferative Activityâ€
Two series of quinolinquinone derivatives, 2′H-spiro[imidazolidine-4,3′-thieno[2,3-g]quinoline]-2,4′,5,9′- tetraones (2a-n) and 2H-spiro[thieno[2,3-g]quinoline-3,5′-[1,2,4]triazinane]-3′,4,6′,9-tetraones (3a-e), were designed and synthesized using the previously described ethyl 3-amino-4,9-dioxo-2,3,4,9-tetrahydrothieno[2,3-
g]quinoline-3-carboxylate (1) as a starting material. All compounds were evaluated for their antiproliferative activity against a panel of representative liquid and solid human tumor cell lines and exhibit IC50 values in the micromolar/submicromolar range. Series 2 displayed higher cytotoxicity than did series 3. The nature of the substituents on both imidazoline and triazinane N1 nitrogen markedly affected the activity profile of these series. Spectrophotometric and fluorescence measurements as well as unwinding assays performed on the most cytotoxic compounds, 2c, 2g, and 2k, showed that they are nonintercalative DNA agents and inhibit the catalytic activity of Topo II in a concentration-dependent mode. 2g was the most active Topo II inhibitor with activity levels comparable to those of VP-16
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