ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
The cystine-knot motif, made up of three intertwined disulfide bridges, is a unique feature of several toxins, cyclotides and growth factors, and occurs in a variety of species, including fungi, insects, molluscs and mammals. Growth factor molecules containing the cystine-knot motif serve as ligands ...
The purpose of the paper is to develop a novel simulation system for ship propulsion plant. The nonlinear mathematical model of main propulsion system of a large container ship is established, consisting of the large low speed two-stroke diesel engine, shaft, fixed pitch propeller and ship hull dynamics. ...
Three underwater remotely operated vehicles (ROVs) were used over a five day period to inspect critical infrastructure and to assist with victim search and recovery at six sites in the Iwate Prefecture following the Tohoku Earthquake and Tsunami. Unmanned marine vehicles have been used since 2004 for ...
Defence Research and Development Canada has recently wrapped up a 4-year project to demonstrate an integrated system for force protection in harbours, the Canadian Underwater Protection System (CUwPS). The intention of the Maritime Force Protection Technology Demonstration Project was to provide advice ...
Background The Symbiodinium community associated with scleractinian corals is widely considered to be shaped by seawater temperature, as the coral's upper temperature tolerance is largely contingent on the Symbiodinium types harboured. Few studies have challenged this paradigm as knowledge of other ...
Rising CO2 concentrations and water temperatures this century are likely to have transformative effects on many coastal marine organisms. Here, we compared the responses of two life history stages (larval, juvenile) of three species of calcifying bivalves (Mercenaria mercenaria, Crassostrea virginica, ...
Cyanobacterial blooms and hepatotoxic microcystins (MCs) usually occur in summer, constituting a sanitary and environmental problem in Salto Grande Dam, Argentina. Water sports and recreational activities take place in summer in this lake. We reported an acute case of cyanobacterial poisoning in Salto ...
This study presents a cooperative underwater box-pushing scenario, in which three autonomous robotic fish that sense, plan and act on its own move an elongated box from some initial location to a goal location. With the onboard monocular camera, the robotic fish can estimate the pose of the object in ...
Many carcinogenic polycyclic aromatic hydrocarbons (PAHs) and their metabolites can bind covalently to DNA. Carcinogen-DNA adducts may lead to mutations in critical genes, eventually leading to cancer. In this study we report that fish oil (FO) blocks the formation of DNA adducts by detoxification of ...
Abstract A new, small-diameter ultrasonic scanning logging tool has been field tested and commercially deployed for simultaneous cement-sheath and casing evaluation. The tool is designed for use in 9-5/8-in„ heavy-weight casing down to 4-1/2-in. casing. Enhancements in downhole electronics, computing ...
Abstract Description There is very limited information available on the deep water biodiversity offshore Nigeria. Detailed information on seabed communities is vital for effective environmental management of offshore drilling disturbance but collection of environmental data usually require a dedicated ...
Abstract Efficient operations are critical to the successful development of North Slope, Alaska, prospects where an abbreviated drilling season and rig-time costs constrain project planning. Logging While Drilling (LWD) provides the real-time data used to make essential well construction decisions. ...
Abstract This paper describes the challenges addressed during testing, completion and subsequent re-entry for Jurassic prospects in an ultra-deep HPHT exploratory well in highly sour environments. The approach and methodology adopted to address the problems related to perforation, Coiled Tubing, stimulation ...
Background Diatoms are dominant photosynthetic organisms in the world's oceans and are considered essential in the transfer of energy through marine food chains. However, these unicellular plants at times produce secondary metabolites such as polyunsaturated aldehydes and other products deriving from ...
Background Phytoplankton cultures are widely used in aquaculture for a variety of applications, especially as feed for fish larvae. Phytoplankton cultures are usually grown in outdoor tanks using natural seawater and contain probiotic or potentially pathogenic bacteria. Some Roseobacter clade isolates ...
The effect of ocean acidification conditions has been investigated in cultures of the diatom Thalassiosira pseudonana CCMP1335. Expected end-of-the-century pCO2 (aq) concentrations of 760 µatm (equivalent to pH 7.8) were compared with present-day condition (380 µatm CO2, pH 8.1). Batch culture pH changed ...
Carrageenans are a collective family of linear, sulphated galactans found in a number of commercially important species of marine red alga. These polysaccharides are known to elicit defense responses in plant and animals and possess anti-viral properties. We investigated the effect of foliar application ...
The suspension feeding bivalve Austrovenus stutchburyi is a key species on intertidal sandflats in New Zealand, affecting the appearance and functioning of these systems, but is susceptible to several environmental stressors including sedimentation. Previous studies into the effect of this species on ...
Background The deep-sea hydrothermal vent mussel Bathymodiolus azoricus harbors thiotrophic and methanotrophic symbiotic bacteria in its gills. While the symbiotic relationship between this hydrothermal mussel and these chemoautotrophic bacteria has been described, the molecular processes involved ...
Stomach content analysis (SCA) and more recently stable isotope analysis (SIA) integrated with isotopic mixing models have become common methods for dietary studies and provide insight into the foraging ecology of seabirds. However, both methods have drawbacks and biases that may result in difficulties ...