950 research outputs found

    Study Of Pits And Fissures On Occlusal Surfaces Of Human Teeth

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    The northernmost record of the blue-spotted cornetfish from the Mediterranean Sea

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    A school of Fistularia commersonii was sighted off Laigueglia (Italy), Northwestern Ligurian Sea, inAugust 2008. This fast spreading invasive Indo-Pacific fish was first recorded in the Mediterranean fromIsrael, and it has since spread clear across the sea. This is the northernmost record from the Mediterranean

    Biodiversity impacts of ship movement, noise, grounding and anchoring

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    Marine life in the Mediterranean Sea is threatened by intensive human activities such as fisheries, ship traffic, pollution and coastal development. Cetaceans and other vertebrates are affected not only by chemical pollution, but also by noise pollution (Richardson et al., 1995; Simmonds et al., 2004). Noise has become a ubiquitous form of marine pollution, especially in areas of heavy maritime traffic and along developed coasts. Intense underwater noise is generated by airguns, widely used for geophysical exploration in the oil and gas industry as well as for academic and government research purposes; by high power sonar, either military or civilian; by ship traffic; by shoreline and offshore construction works; and by a number of other commercial, scientific, military and industrial sources. The most powerful noises (from airguns, sonars, and explosions) may directly injure animals in the vicinity of the source. General ship traffic, heavy industries on the coast and a variety of other human activities generally do not generate such intense noise, but the acoustic pollution they produce is constant over time and may affect large areas. It may be a serious hazard not only to individual animals, but also to entire populations. Such increased background noise affects underwater life just as airborne noise affects terrestrial animals, including human beings.peer-reviewe

    Ternary Syndrome Decoding with Large Weight

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    The Syndrome Decoding problem is at the core of many code-based cryptosystems. In this paper, we study ternary Syndrome Decoding in large weight. This problem has been introduced in the Wave signature scheme but has never been thoroughly studied. We perform an algorithmic study of this problem which results in an update of the Wave parameters. On a more fundamental level, we show that ternary Syndrome Decoding with large weight is a really harder problem than the binary Syndrome Decoding problem, which could have several applications for the design of code-based cryptosystems

    Migration routes of the Grant's Zebra

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    This is where the abstract of this record would appear. This is only demonstration data

    Methyl 2-{6-[(1-meth­oxy-1-oxopropan-2-yl)amino­carbon­yl]pyridine-2-carboxamido}­propano­ate

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    In the title compound, C15H19N3O6, the amide planes are inclined at dihedral angles of 0.8 (6) and 12.1 (3)° with respect to the central pyridine ring. The mean planes of the corresponding methyl acetate groups form dihedral angles of 41.76 (13) and 86.48 (15)°, respectively with the mean plane of pyridine ring. A pair of weak intra­molecular N—H⋯N hydrogen bonds generate an S(5)S(5) ring motif in the mol­ecule. In the crystal, mol­ecules are linked by N—H⋯O hydrogen bonds into [001] chains. The chains are cross-linked by C—H⋯O hydrogen bonds into layers lying parallel to bc plane. The crystal packing also features a C—H⋯π inter­action

    Optimal biosynthesis and characterization of broad-spectrum antibacterial cupric oxide nanoparticles using bee glue

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    This work describes a simple and effective approach for producing broad-spectrum antibacterial cupper oxide nanoparticles (CuO NPs) using bee glue. The volumetric ratio of the reactants (copper salt and aqueous propolis extract) was 40 ml to 20 ml. The pH of the reaction was 8. The optimum temperature for the reaction was 70 °C, while the fastest time for the formation of these nanoparticles was 13 minutes. Ultraviolet-visible ray absorption spectra indicated surface plasmon resonance at around 300 nm, proving the synthesis of CuO NPs. The Fourier-transform infrared spectra study confirmed the presence of the CuO nanoparticles at 533-582 cm-1, as well as the responsible biomolecules for the capping and stability of these nanoparticles. X-ray powder diffraction and transmission electron microscopy determined the shape and size of the CuO NPs nanoparticles. These nanoparticles have a monoclinic shape and an average size of 31.75 nm.The antibiotic activity assay results of CuO NPs were impressive and promising against six different strains of microbes
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