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1
Cucarella-Ramón, Vicent. "Afroperipheral indigeneity in Wayde Compton’s The Outer Harbour." International Journal of English Studies 21, no. 1 (June 29, 2021): 21–37. http://dx.doi.org/10.6018/ijes.437511.
Повний текст джерелаАнотація:
Black Canadian writer Wayde Compton’s short story collection The Outer Harbour (2015) is located in the Afroperiphery of British Columbia which stands as a ‘contact zone’ that enables the alliances between Black and Indigenous peoples and also establishes a fecund ground of possibilities to emphasize the way in which cross-ethnic coalitions and representations reconsider imperial encounters previously ignored. The stories participate in the recent turn in Indigenous studies towards kinship and cross-ethnicity to map out the connected and shared itineraries of Black and Indigenous peoples and re-read Indigeneity in interaction. At the same time, the stories offer a fresh way to revisit Indigeneity in Canada through the collaborative lens and perspective of the Afroperipheral reality. In doing so, they contribute to calling attention to current cross-ethnic struggles for Indigenous rights and sovereignty in Canada that rely on kinship and ethnic alliances to keep on interrogating the shortcomings of the nation’s multiculturalism.
2
Musale, Amar S., Dattesh V. Desai, S. S. Sawant, K. Venkat, and A. C. Anil. "Distribution and abundance of benthic macroorganisms in and around Visakhapatnam Harbour on the east coast of India." Journal of the Marine Biological Association of the United Kingdom 95, no. 2 (November 24, 2014): 215–31. http://dx.doi.org/10.1017/s0025315414001490.
Повний текст джерелаАнотація:
Benthic communities form an important component of the marine food chain. Their occurrence also provides information on the health of the ecosystem. A study was carried out to understand the distribution and abundance of macrobenthos along with sediment characteristics and physicochemical parameters in Visakhapatnam Harbour, a major port along the east coast of India. In all 84 macrobenthic taxa were reported from the port area of which 60 were polychaetes and 24 were other invertebrate taxa. Our observations revealed an increase in the number of polychaete species observed over the last 20 years from this region. An earlier study reported 38 polychaete species in 1975 and a year later the number of polychaete species reported was 12, indicating an increase in the number of polychaete species in the present study by about 150%. The macrobenthic abundance and dominance of species varied with the seasons. Pre-monsoon was dominated by Cirratulus sp., during monsoon tanaids were dominant indicating a seasonal shift in the occurrence and dominance of macrobenthos. During post-monsoon, Cossura coasta was dominant followed by Nephtys dibranchis and amphipods. Sediment characteristics (sand, silt and clay), organic carbon and dissolved oxygen were the important factors influencing the abundance and species diversity. The abundance of macrobenthic forms also varied with inner and outer harbour region. Higher species diversity was observed in the outer harbour suggesting the outer harbour has semi-polluted conditions such as higher dissolved oxygen (DO) and salinity, low nutrients (nitrite, nitrate and silicate) and low organic carbon in the sediment.
3
Leow, Joanne. "Lost Islands, Future Islands: Reading Wayde Compton’s The Outer Harbour Relationally." University of Toronto Quarterly 89, no. 1 (July 2020): 145–62. http://dx.doi.org/10.3138/utq.89.1.09.
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Shan, Shiliang, and Jinyu Sheng. "Examination of circulation, flushing time and dispersion in Halifax Harbour of Nova Scotia." Water Quality Research Journal 47, no. 3-4 (August 1, 2012): 353–74. http://dx.doi.org/10.2166/wqrjc.2012.041.
Повний текст джерелаАнотація:
This study examines the circulation, flushing time and hydrodynamic connectivity in Halifax Harbour based on three-dimensional currents produced by a multi-nested coastal ocean circulation modelling system. The time-mean currents produced by the modelling system feature two-layer estuarine circulation with a seaward flow in the upper layer and a landward flow in the lower layer in the Harbour. The hydrodynamics in the Harbour are also affected significantly by tides and wind forcing. Based on numerical passive tracer experiments, the estimated e-folding flushing time is about 40 and 90 days in the upper and the entire Bedford Basin, respectively. By comparison, the flushing time is about 2–5 days over the Inner and Outer Harbour, and only about 1 day in the Narrows. Analysis of passive particle trajectories carried by the model currents demonstrates that movements of particles in the Harbour are strongly affected by tidal and storm-induced currents. Hydrodynamic connectivity in the study region is also quantified in terms of a connectivity matrix calculated from particle trajectories.
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De Wilde, M., L. Lauriks, P. Vanderborght, M. Gabriels, W. Van Melckebeke, S. Van Steenkiste, J. Van Leuven, et al. "The windfarm in the outer harbour of zeebrugge — 9 months of experience." Journal of Wind Engineering and Industrial Aerodynamics 27, no. 1-3 (January 1988): 199–211. http://dx.doi.org/10.1016/0167-6105(88)90036-0.
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6
Court, Deborah A., Roland Lill, and Walter Neupert. "The protein import apparatus of the mitochondrial outer membrane." Canadian Journal of Botany 73, S1 (December 31, 1995): 193–97. http://dx.doi.org/10.1139/b95-245.
Повний текст джерелаАнотація:
The majority of proteins within mitochondria are synthesized on cytosolic ribosomes and imported into the organelles. Protein complexes in the mitochondrial outer membrane harbour both the receptors that recognize these preproteins, and a translocation pore. These "receptor complexes" are the entry points for most preproteins, which are subsequently targeted to their final submitochondrial locations. The outer membrane complexes cooperate with the import machinery of the inner membrane to target preproteins to the inner membrane itself, the matrix, or, in some cases, to the intermembrane space. In isolated outer membranes, these complexes are capable of accurately importing preproteins destined for the outer membrane. Our current understanding of the composition, function, and biogenesis of these outer membrane receptor complexes is the focus of this article. Key words: mitochondria, outer membrane, protein import, receptors.
7
Kolb, BH, and MC Heineman. "Controlling mechanisms of sediment-driven dissolved oxygen dynamics in New Bedford Outer Harbour." Marine and Freshwater Research 46, no. 1 (1995): 69. http://dx.doi.org/10.1071/mf9950069.
Повний текст джерелаАнотація:
A summer-long monitoring programme investigated mechanisms controlling near-bottom dissolved oxygen (DO) concentrations in New Bedford Outer Harbor, a shallow embayment on the southern Massachusetts coast that receives discharge from a 1.3 m3 s-1 municipal sewage outfall. Continuously recording meters and hydrographic cruises measured DO, temperature, salinity, meteorology, waves and/or currents. The programme quantified the magnitude, spatial extent and duration of oxygen undersaturation in the bottom waters. Summer stratification of New Bedford Outer Harbor reduced reaeration of the bottom waters. Depletion of near-bottom DO was strongly correlated with the presence and duration (though not intensity) of stratification. Stratification is typically thermal, a result of seasonal warming of the water surface, although it can become enhanced (and somewhat salinity driven) owing to the influx of cold saline bottom water following major storm events. Destratification is caused by high wind speed or a drop in 24-h average air temperatures below the water temperature. The decrease in DO concentrations when the water column is stratified is directly related to local sediment oxygen demand. In general, DO dynamics were found to be local and fundamentally one dimensional.
8
Schaefer, Nina, Katherine A. Dafforn, Emma L. Johnston, and Mariana Mayer-Pinto. "Size, depth and position affect the diversity and structure of rock pool communities in an urban estuary." Marine and Freshwater Research 70, no. 7 (2019): 1034. http://dx.doi.org/10.1071/mf18074.
Повний текст джерелаАнотація:
Rock pools provide a range of ecological niches that can support diverse assemblages on rocky shores. As intertidal shores are increasingly lost to developments, understanding the drivers of diversity in rock pools is important for the conservation and construction of these key habitats. In this study we investigated relationships between physical characteristics of rock pools and their biota in an urban estuary. We sampled the biota every 6 weeks for 1 year at sites in the inner and outer zones of Sydney Harbour. In the well-flushed and exposed outer zone, sessile and mobile taxa richness was positively related to rock pool width, whereas only mobile taxa richness was related to depth and volume. In the more urbanised and less exposed inner zone, mobile taxa richness was positively related to rock pool width and volume. In both zones, sessile taxa richness decreased with increasing height on shore. Our results suggest that the biodiversity of intertidal rock pools varies depending on their position in Sydney Harbour and the available species pool. Therefore, restoration efforts should consider rock pool size parameters and local environmental conditions, including location, so designs can be optimised to maximise species diversity in these pools.
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Schaefer, Nina, Katherine A. Dafforn, Emma L. Johnston, and Mariana Mayer-Pinto. "Corrigendum to: Size, depth and position affect the diversity and structure of rock pool communities in an urban estuary." Marine and Freshwater Research 70, no. 7 (2019): 1045. http://dx.doi.org/10.1071/mf18074_co.
Повний текст джерелаАнотація:
Rock pools provide a range of ecological niches that can support diverse assemblages on rocky shores. As intertidal shores are increasingly lost to developments, understanding the drivers of diversity in rock pools is important for the conservation and construction of these key habitats. In this study we investigated relationships between physical characteristics of rock pools and their biota in an urban estuary. We sampled the biota every 6 weeks for 1 year at sites in the inner and outer zones of Sydney Harbour. In the well-flushed and exposed outer zone, sessile and mobile taxa richness was positively related to rock pool width, whereas only mobile taxa richness was related to depth and volume. In the more urbanised and less exposed inner zone, mobile taxa richness was positively related to rock pool width and volume. In both zones, sessile taxa richness decreased with increasing height on shore. Our results suggest that the biodiversity of intertidal rock pools varies depending on their position in Sydney Harbour and the available species pool. Therefore, restoration efforts should consider rock pool size parameters and local environmental conditions, including location, so designs can be optimised to maximise species diversity in these pools.
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Kelley, Donovan. "Bass nurseries on the west coast of the U.K." Journal of the Marine Biological Association of the United Kingdom 66, no. 2 (May 1986): 439–64. http://dx.doi.org/10.1017/s0025315400043058.
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INTRODUCTIONPresence of O-group bass, Dicentrarchus labrax (L.), has been recorded for a number of estuaries and tidal backwaters in the south of the United Kingdom, including the tidal Thames (Wheeler, 1979), the outer Thames at Southend (Murie, 1903), the Medway (Van den Broek, 1979), Langstone Harbour (Reay, 1973), the Dart (Dando & Demir, 1985), and the Tamar (Hartley, 1940). The author has found them, additionally, in Chichester Harbour and in the Cuckmere (Sussex), Teign and Tavy estuaries. Correspondents have reported them from the estuaries of the Blackwater (Cox), Crouch (Wiggins), Lynher (Gee) and Fal (Melhuish); also from the Fleet backwater in Dorset (Fear). It may be inferred that all estuaries and tidal backwaters on the south and south-east coasts of the U.K. constitute bass nurseries, in some degree.*
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Merrens, Roy. "Port Authorities as Urban Land Developers." Articles 17, no. 2 (August 6, 2013): 92–105. http://dx.doi.org/10.7202/1017654ar.
Повний текст джерелаАнотація:
Port authorities have been important presences in Canada's port cities, playing major roles in determining the physical form and land-use functions of urban waterfront lands. Their formative roles warrant attention from scholars concerned with the city-building process in Canada. This study focuses upon one such body, The Toronto Harbour Commissioners, and how and why it has functioned as a land development agency. An analysis of the commissions Outer Harbour project between 1912 and 1968 shows the commissions central concern with land development: ostensibly presented as a harbour facility, the project was actually intended to be a key component in the commissions proposed redevelopment of Toronto's central waterfront for profitable commercial and residential use. The project also reveals the significance of landfilling in the commissions urban development role, and, incidentally, explains the existence of the three-mile artificial headland projecting out into Lake Ontario from Toronto's waterfront. The role of the commission as a development agency is explained in terms of its original 1911 mandate, which in turn reflects the intentions of the Toronto Board of Trade, the body that had led the drive to create the commission.
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Majsova, Natalija. "Taking cinematic aesthetics into outer space: Dreaming of Space and Paper Soldier." Maska 32, no. 185 (September 1, 2017): 110–16. http://dx.doi.org/10.1386/maska.32.185-186.110_1.
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This article takes up Rancière’s conceptualization of the regimes of art in order to explore what might be left of art, if the scale of the world is expanded to the cosmos, rather than constrained to earth. Starting from the assertion that the beginning of the space age may be considered an event that radically reshapes the coordinates of subjectivity, the paper discusses its reverberations in the realm of aesthetics. The text focuses on two recent Russian films about the beginning of the space age: Dreaming of Space (2005) and Paper Soldier (2008). Both films are examined as statements – ones that are contextually bound and yet that harbour an element of excess – rather than as mere representations of a certain socio-cultural context.
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Salinas, J. I. Saiz, and I. Isasi Urdangarin. "Response of Sublittoral Hard Substrate Invertebrates to Estuarine Sedimentation in the Outer Harbour of Bilbao (N. Spain)." Marine Ecology 15, no. 2 (October 1994): 105–31. http://dx.doi.org/10.1111/j.1439-0485.1994.tb00048.x.
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Paquin, Jean-Philippe, Youyu Lu, Stephanne Taylor, Hauke Blanken, Guillaume Marcotte, Xianmin Hu, Li Zhai, et al. "High-resolution modelling of a coastal harbour in the presence of strong tides and significant river runoff." Ocean Dynamics 70, no. 3 (December 18, 2019): 365–85. http://dx.doi.org/10.1007/s10236-019-01334-7.
Повний текст джерелаАнотація:
AbstractIn the context of Canada’s Ocean Protection Plan (OPP), improved coastal and near-shore modelling is needed to enhance marine safety and emergency response capacity in the aquatic environment. In this study, the Nucleus for European Modelling of the Ocean (NEMO) is adopted to develop an ocean forecasting system for Saint John harbour in the Bay of Fundy, on the east coast of Canada. The challenging regional oceanography is characterized by the presence of some of the world’s strongest tides, significant river runoff and complicated geometry. A three-level one-way nesting approach is used to downscale from a 1/12° North Atlantic-Arctic regional model to very-high-resolution port-scale around Saint John harbour. The three nested grids cover the outer shelf, the Bay of Fundy and finally the approach to the harbour with resolutions of 2.5 km, 500 m and 100 m respectively. Due to the lack of accurate runoff data at the Saint John River outlet, the model’s lateral open boundary condition is modified to introduce the river forcing with the observed time series of water level near the mouth of the river. Evaluation with observational data demonstrates the model’s accuracy for the simulation of tidal elevation and currents, non-tidal water level and currents, temperature and salinity. Comparison with the observed sea surface temperature demonstrates the improved model accuracy through increasing the horizontal resolution. Virtual Lagrangian trajectories computed using the modelled surface currents and including wind effects show good agreement with the observed trajectories of different types of surface drifters. This study demonstrates the capability of the NEMO modelling framework to provide very-high-resolution modelling at port-scale resolution for the Saint John harbour.
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MOHAPATRA, ANIL, DAVID G. SMITH, SWARUP RANJAN MOHANTY, SUBHRENDU SEKHAR MISHRA, and PRASAD C. TUDU. "Enchelycore propinqua sp. nov., a new moray eel (Anguilliformes: Muraenidae: Muraeninae) from the Indian Coast." Zootaxa 4319, no. 3 (September 13, 2017): 595. http://dx.doi.org/10.11646/zootaxa.4319.3.11.
Повний текст джерелаАнотація:
A new moray Enchelycore propinqua sp. nov., is described from a single specimen collected from Visakhapatnam fishing harbour, Andhra Pradesh, India. The species has a reddish brown body mottled with irregular creamy white spots; dorsal-fin origin considerably behind gill opening, but well ahead of level of anus; sharply pointed recurved teeth; biserial intermaxillary and maxillary teeth, those of inner row larger and more widely spaced than outer row. It differs from congeners by higher predorsal vertebrae and lower total vertebral count (MVF 20-51-120). The colouration is distinctly different from other species of the genus.
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BALLAL, M. S. G., N. EMMS, M. O’DONOGHUE, and T. R. REDFERN. "Rhys-Davies Exsanguinator: A Haven for Bacteria." Journal of Hand Surgery (European Volume) 32, no. 4 (August 2007): 452–56. http://dx.doi.org/10.1016/j.jhsb.2007.02.011.
Повний текст джерелаАнотація:
Serial swabs were taken from the inner and outer surfaces of a new Rhys-Davies exsanguinator before and after use on the limbs of patients to exsanguinate limbs prior to tourniquet inflation and surgery. Both surfaces of the exsanguinator showed increasing levels of contamination with bacterial colonisation with use starting from the first use. The organisms grown included potentially harmful bacteria such as Pseudomonas sp. The Rhys-Davies exsanguinator can harbour potentially harmful organisms and, thus, may raise the risk of infection transmission between patients when used without cleaning between uses. Methods of effective cleaning of the exsanguinator between uses are discussed.
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Anderwald, Pia, Michael Damien Haberlin, Mary Coleman, Oliver Ó Cadhla, Anneli Englund, Fleur Visser, and Michelle Cronin. "Seasonal trends and spatial differences in marine mammal occurrence in Broadhaven Bay, north-west Ireland." Journal of the Marine Biological Association of the United Kingdom 92, no. 8 (September 25, 2012): 1757–66. http://dx.doi.org/10.1017/s0025315412001397.
Повний текст джерелаАнотація:
Long-term monitoring programmes of a comparatively small area complement larger scale, but temporally limited surveys and can provide extensive datasets on seasonal occurrence and fine-scale habitat use of multiple species. A marine mammal monitoring programme, involving year-round, land-based observations, has been conducted in Broadhaven Bay candidate Special Area of Conservation, north-west Ireland, during 2002, 2005 and 2008–2011. Nine cetacean and two seal species have been recorded, with grey seal, harbour porpoise, common and bottlenose dolphins, and minke whale present throughout the year. Generalized additive models, taking into account observer effort, sighting conditions (sea state) and interannual variation, did not reveal any significant seasonal patterns in the occurrence of grey seals, bottlenose dolphins and minke whales. On the other hand, common dolphin presence in Broadhaven Bay was highest during autumn and winter. Bottlenose dolphins could be separated spatially from both common dolphins and minke whales in a classification tree by their preferential use of the shallower inshore areas of the bay (<30 m depth). However, common dolphins and minke whales, which occurred mainly in the deeper outer section of Broadhaven Bay, could not be spatially distinguished from each other, and grey seals were distributed over the entire bay. Broadhaven Bay represents an important marine mammal habitat with respect to overall species diversity and the regular occurrence of bottlenose dolphin, harbour porpoise, grey and harbour seals (all listed under Annex II of the EU Habitats Directive).
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Morell, Maria, Lonneke L. IJsseldijk, Alinda J. Berends, Andrea Gröne, Ursula Siebert, Stephen A. Raverty, Robert E. Shadwick, and Marja J. L. Kik. "Evidence of Hearing Loss and Unrelated Toxoplasmosis in a Free-Ranging Harbour Porpoise (Phocoena phocoena)." Animals 11, no. 11 (October 26, 2021): 3058. http://dx.doi.org/10.3390/ani11113058.
Повний текст джерелаАнотація:
Evidence of hearing impairment was identified in a harbour porpoise (Phocoena phocoena) on the basis of scanning electron microscopy. In addition, based on histopathology and immunohistochemistry, there were signs of unrelated cerebral toxoplasmosis. The six-year old individual live stranded on the Dutch coast at Domburg in 2016 and died a few hours later. The most significant gross lesion was multifocal necrosis and haemorrhage of the cerebrum. Histopathology of the brain revealed extensive necrosis and haemorrhage in the cerebrum with multifocal accumulations of degenerated neutrophils, lymphocytes and macrophages, and perivascular lymphocytic cuffing. The diagnosis of cerebral toxoplasmosis was confirmed by positive staining of protozoa with anti-Toxoplasma gondii antibodies. Tachyzoites were not observed histologically in any of the examined tissues. Ultrastructural evaluation of the inner ear revealed evidence of scattered loss of outer hair cells in a 290 µm long segment of the apical turn of the cochlea, and in a focal region of ~ 1.5 mm from the apex of the cochlea, which was compatible with noise-induced hearing loss. This is the first case of concurrent presumptive noise-induced hearing loss and toxoplasmosis in a free-ranging harbour porpoise from the North Sea.
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Burg, Theresa M., Andrew W. Trites, and Michael J. Smith. "Mitochondrial and microsatellite DNA analyses of harbour seal population structure in the northeast Pacific Ocean." Canadian Journal of Zoology 77, no. 6 (October 10, 1999): 930–43. http://dx.doi.org/10.1139/z99-057.
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The genetic diversity and population structure of harbour seals (Phoca vitulina richardsi) along the coasts of British Columbia and parts of Alaska were investigated using both mitochondrial DNA (mtDNA) and nuclear DNA. A 475-bp fragment of the mitochondrial control region was amplified and sequenced from 128 animals. Sixty variable sites defined 72 mtDNA haplotypes with pairwise nucleotide differences as high as 5%. Fifty-eight haplotypes were represented by a single individual, and shared haplotypes were generally restricted to a small geographic range. Phylogenetic reconstruction revealed two distinct populations comprising (i) southern British Columbia and (ii) northern British Columbia - southeast Alaska. Furthermore, the order of the clades suggests that the Pacific Ocean was colonized at least twice, 670 000 and 380 000 years ago. Haplotypes from the first invasion are restricted to a small number of seals around southern Vancouver Island. Analyses of five polymorphic microsatellite loci showed significant differences between the populations of southern British Columbia and northern British Columbia - Alaska. Migration rates for males based on microsatellite data (3-22 seals/generation) were higher than those obtained for females from mtDNA data (0.3 females/generation). Combining all the DNA data collected to date suggests that there are at least three populations of harbour seals in the Pacific composed of seals from (i) Japan, Russia, Alaska, and northern British Columbia, (ii) southern British Columbia and Puget Sound, Washington, and (iii) the outer coasts of Washington, Oregon, and California. The data do not support the existence of two subspecies of harbour seals in the Pacific Ocean.
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Fletcher, WJ, and RJ Tregonning. "Distribution and timing of spawning by the Australian pilchard (Sardinops sagax neopilchardus) off Albany, Western Australia." Marine and Freshwater Research 43, no. 6 (1992): 1437. http://dx.doi.org/10.1071/mf9921437.
Повний текст джерелаАнотація:
The pattern of abundance of eggs and larvae of the Australian pilchard, Sardinops sagax neopilchardus, collected by plankton tows in the region off Albany, Western Australia, was investigated. In 1989, surface tows were undertaken at five localities extending from the marine embayment of Princess Royal Harbour to the continental shelf just outside King George Sound. In 1990, oblique tows were undertaken at six localities extending from just inside King George Sound to beyond the edge of the continental shelf. Eggs and larvae of pilchards were found in many months, but peaks in egg numbers were found in July and December of both 1989 and 1990. There was, however, only one peak in larva abundance, during December. Most eggs and larvae were found in the region 2-8 km offshore from the entrance to King George Sound. Few were found either well inside King George Sound and Princess Royal Harbour or in outer-shelf localities. Spawning in the Albany region therefore occurred inshore of the main influence of the eastward-flowing tropical waters of the Leeuwin Current. The implications of this spawning activity in relation to the fishery for this species and the potential for stock separation along this coast are discussed.
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Tomlin, E. S., and J. H. Borden. "Relationship between leader morphology and resistance or susceptibility of Sitka spruce to the white pine weevil." Canadian Journal of Forest Research 24, no. 4 (April 1, 1994): 810–16. http://dx.doi.org/10.1139/x94-106.
Повний текст джерелаАнотація:
Sitka spruce, Piceasitchensis (Bong.) Carr., from 27 provenances and five sites in British Columbia, were examined for traits of leader morphology that might be involved in resistance to the white pine weevil, Pissodesstrobi (Peck). Trees from the Usk Ferry provenance at Head Bay and the Kitwanga provenance at Nass River both had low incidence of weevilling, and had needles pressed more closely against the stems by up to 20° than trees from other provenances. At Fair Harbour, trees from the two most resistant provenances, Haney and Cedarvale, had inner resin ducts that were approximately twice the diameter of those in trees from the most susceptible provenances. Resistant trees from these two provenances also had significantly more outer resin ducts than those from any other provenance planted at any of the five sites. Values ranged from 28 outer ducts per centimetre for Haney trees, to <1 per centimetre for very susceptible trees from the Masset Sound provenance in the Queen Charlotte Islands, where the absence of weevils could have eliminated any selection for trees with a high density of resin ducts. We hypothesize that trees from the Haney and Cedarvale provenances may have large numbers of outer resin ducts as an important resistance mechanism, which could be used as a selection criterion for resistance. Resistant trees from other provenances such as Big Qualicum, Kitwanga, and Green Timbers, which have fewer outer resin ducts than those from Haney and Cedarvale, must rely heavily on mechanisms other than those associated with the resin system morphology.
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Van Damme, L., L. Taerwe, R. Dedeyne, and J. De Rouck. "QUALITY AND DURABILITY OF CONCRETE ARMOUR UNITS." Coastal Engineering Proceedings 1, no. 21 (January 29, 1988): 156. http://dx.doi.org/10.9753/icce.v21.156.
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The reliability of rubble mound breakwaters not only depends on the hydraulic stability but to a large extent on the strength of the armour units as well. In the debate on the shape of armour units, which turns out quite often to be merely academic in nature, generally too little attention is paid to the question of structural strength. On the occasion of the realization of the new outer harbour at Zeebrugge (Belgium) a serious effort has been made to arrive at a better understanding in the behaviour of concrete as construction material for armour units. This contribution gives an overview of the routine tests and of some particular investigations, carried out with respect to quality and durability of concrete armour units.
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van der Hulst, Thijs, and Renzo Sancisi. "Evidence for Gas Accretion in Galactic Disks." Symposium - International Astronomical Union 217 (2004): 122–29. http://dx.doi.org/10.1017/s007418090019727x.
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Studies of the HI in galaxies have clearly shown that subtle details of the HI distribution and kinematics often harbour key information for understanding the structure and evolution of galaxies. Evidence for the accretion of material has grown over the past many years and clear signatures can be found in HI observations of galaxies. We have obtained new detailed and sensitive HI synthesis observations of three nearby galaxies which are suspected of capturing small amounts of HI and show that indeed accretion of small amounts of gas is taking place in these galaxies. This could be the same kind of phenomenon of material infall as observed in the stellar streams in the halo and outer parts of our galaxy and M 31.
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Rahman, Lubna, Asma Mukhtar, Sajjad Ahmad, Lutfur Rahman, Muhammad Ali, Muhammad Saeed, and Zabta Khan Shinwari. "Endophytic bacteria of Fagonia indica Burm. f revealed to harbour rich secondary antibacterial metabolites." PLOS ONE 17, no. 12 (December 15, 2022): e0277825. http://dx.doi.org/10.1371/journal.pone.0277825.
Повний текст джерелаАнотація:
Endophytic bacteria are the source of novel bioactive compounds, used as therapeutic agent. Molecular docking is a computational technique use frequently, to find novel drugs targets and drugs-receptors interactions. The current study was designed to isolate and identify endophytic bacteria for the extraction of bioactive compounds. Further, to characterized extracts and to explore compounds interactions with bacterial cell wall and outer membrane synthesizing proteins. Endophytes were identified using 16s rRNA amplification technique. For bioactive compounds, solvent extraction method was followed and characterized further through GC-MS analysis. To find targets and drugs-receptors interactions, molecular docking studies and biological assays were performed. The isolated endophytes belong to five different genera namely Enterobacter, Bacillus, Erwinia, Stenotrophomonas and Pantoea. In case of antibacterial assay Stenotrophomonas maltophilia extract showed significant inhibitory zones (15.11±0.11mm and 11.3±0.16) against Staphylococcus caseolyticus and Acinetobacter baumanni, with MIC 33.3 and 50μg/mL respectively. Among the characterized fifty compounds, from endophytic bacteria “antibacterial compound” N-(5-benzyl-10b-hydroxy-2-methyl-3,6-dioxooctahydro-8H-oxazolo[3,2-α] pyrrolo[2,1c] pyrazin-2-yl)-7-methyl2,3,3a,3a1,6,6a,7,8,9,10,10a,10b-dodecahydro-1H-4λ2-indolo[4,3-fg]quinoline-9-carboxamide of bacteria Stenotrophomonas maltophilia were an excellent binder with MurF ligase active site, with binding energy of -10.2 kcal/mol. Extracts of endophytic bacteria composed of various pharmacologically active ingredients such as antibacterial compounds. Molecular docking studies provide important information regarding drug-receptor interaction, thus can be used in novel drug discovery.
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Härtling, Joachim W., and Robert Gilbert. "Spatial distribution of surficial sediments in part of the Kingston basin of northeastern Lake Ontario, Canada." Canadian Journal of Earth Sciences 37, no. 6 (June 1, 2000): 901–11. http://dx.doi.org/10.1139/e00-003.
Повний текст джерелаАнотація:
The distribution of surficial sediments in the interisland area of northeastern Lake Ontario is characterized by a generally homogeneous composition of fine grained muds with some local exceptions at the gaps leading into Kingston basin and in parts of North Channel. This pattern reflects principally differing levels of wave energy from the exposed areas of outer Kingston basin and Upper and Lower gaps to the more protected interisland area. Additional processes responsible for the distribution are currents at the Upper and Lower gaps and local slumping. The observed deposition of surficial sediments in the northern Kingston basin shows generally good agreement with the wave base calculations employing wind speeds of 60 km·h-1. The study region consists of three sedimentary environments. Above the wave base related to winds of less than 60 km·h-1 continual erosion and transport of all grain sizes leads to a constant source of sediment to the deeper parts of the Kingston basin. Above the wave base related to infrequent strong winds of more than 60 km·h-1, episodic removal of the fine grain sizes leads to winnowing of the fines and their being transported into North Channel and Kingston Harbour while the sands are left in place. Below the wave base the sediments are undistributed. Thus, there is no proximal-distal differentiation outward from the coasts nor along the channels. The sediment is transported with currents moving through North Channel and Kingston Harbour with similarly low velocities across the entire section.
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Fraile-Marcos, Ana María. "Afroperipheralism and the Transposition of Black Diasporic Culture in the Canadian Glocal City: Compton's The Outer Harbour and Brand's Love Enough." African American Review 51, no. 3 (2018): 181–95. http://dx.doi.org/10.1353/afa.2018.0031.
Повний текст джерела
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DATTATRI, J., and P. VIJAYA KUMAR. "Wave Prediction for the east coast of India under storm conditions in the Bay of Bengal." MAUSAM 25, no. 2 (February 7, 2022): 211–22. http://dx.doi.org/10.54302/mausam.v25i2.5195.
Повний текст джерелаАнотація:
Cyclonic storms are frequent in the Bay of Bengal particularly during the NE monsoon period. Some of these storms are severe and generate high waves which cause havoc in the coastal regions. This paper presents an analysis of the cyclonic storm which hit coastal Andhra Pradesh on 7 November 1969.
Wave prediction under storm conditions involves an analysis of moving fetches and variable wind speeds. Wilson's graphical method incorporating the latest available wave prediction relations was used for wave predicted waves which are deep water waves, were modified to account for refraction, shoaling and bottom friction effects as they enter shallower waters. The predicted waves were compared with the waves observed by the Visakhapatnam outer harbour authorities.
The results of the analysis suggest that (i) Wilson's graphical method can be applied for wave prediction for Indian coasts under storm conditions, (ii) the recommended value of bottom friction factor appears to be low and (iii) waves of considerable height are experienced even in areas not in the direct path of the cyclone.
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GIBSON, W., J. G. PILKINGTON, and J. M. PEMBERTON. "Trypanosoma melophagium from the sheep ked Melophagus ovinus on the island of St Kilda." Parasitology 137, no. 12 (June 14, 2010): 1799–804. http://dx.doi.org/10.1017/s0031182010000752.
Повний текст джерелаАнотація:
SUMMARYThe sheep ked has been largely eradicated in the UK but persists in the feral Soay sheep of St Kilda in the Outer Hebrides. Sheep keds transmit Trypanosoma melophagium, but parasitaemias are typically cryptic and this trypanosome has not been recorded in the St Kilda sheep. Trypanosomes were detected by PCR in preserved keds and were also found in gut smears from live keds; one infected gut was used to establish the trypanosome in vitro. Examination of the morphology of bloodstream forms from culture confirmed its identity as T. melophagium. Most keds were found to harbour the trypanosome, particularly those collected from lambs. DNA was extracted from preserved keds and from trypanosomes grown in vitro. Sequence analysis of the small subunit ribosomal RNA (SSU rRNA) gene and the spliced leader transcript showed the T. melophagium sequences to be very similar to those from T. theileri. A partial sequence of the ked SSU rRNA gene was also obtained. The close genetic relationship of T. melophagium and T. theileri suggests that T. melophagium represents a lineage of T. theileri that adapted to transmission by sheep keds and hence became a specific parasite of sheep.
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Nahar, Nusrat, and Ridwan Bin Rashid. "Phylogenetic Analysis of Antibiotic Resistance Genes and Virulence Genes of Klebsiella species in silico." Dhaka University Journal of Pharmaceutical Sciences 16, no. 1 (July 30, 2017): 119–27. http://dx.doi.org/10.3329/dujps.v16i1.33389.
Повний текст джерелаАнотація:
A total of twelve isolates were screened for virulence and antibiotic resistance genes associated with Klebsiella pneumoniae infections. Virulence and antibiotic resistance genes were detected by in silico PCR amplification. Iron uptake protein entB was detected in 66.67% (n=8) of the isolates while no isolate was found to harbour chelating agent irp2. Iron uptake system kfu, involved in purulent tissue infections and capsule formation, was identified in 25% (n=3) of the isolates. Regulator of mucoid phenotype A, rmpA was not found in any of the isolates. The wabG gene, responsible for urinary tract infections was found in seven K. pneumoniae strains. Five uge positive strains might play role in the pathogenicity of K. pneumoniae infections. About 83.33% of the isolates were positive for type 1 fimbriae fimH1 while no type 3 fimbriae mrkD gene was found. Complement reaction blocked by plasmid traT gene was not observed in Klebsiella species while eight isolates harboured outer membrane lipoprotein, ycfM which protects Klebsiella species from antibiotics. Antibiotic resistance genes blaTEM and blaSHV were detected in 33.33% (n=4) and 66.67% (n=8) of the isolates while 25% isolates carried both blaTEM and blaSHV genes. Genotype 1 carried fimH1 and ycfM genes while all the virulence genes studied were present in genotype 2 and 3. The blaSHV gene was detected in all the genotypes while blaTEM gene was found in only genotype 1 and 3. The findings of this study would be helpful to predict virulence gene associated with Klebsiella infections. This data also helps us to choose antibiotics for treating Klebsiella infections. By assessing the genotypic distribution of antibiotic resistance gene, correct antibiotic can be used to treat the infection. This could help reduce emergence of antibiotic resistance since it is known that incorrect choice of antibiotics contributes to antibiotic resistance.Dhaka Univ. J. Pharm. Sci. 16(1): 119-127, 2017 (June)
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GRAHAM, A. L., D. H. NUSSEY, J. O. LLOYD-SMITH, D. LONGBOTTOM, M. MALEY, J. M. PEMBERTON, J. G. PILKINGTON, et al. "Exposure to viral and bacterial pathogens among Soay sheep (Ovis aries) of the St Kilda archipelago." Epidemiology and Infection 144, no. 9 (February 1, 2016): 1879–88. http://dx.doi.org/10.1017/s0950268816000017.
Повний текст джерелаАнотація:
SUMMARYWe assessed evidence of exposure to viruses and bacteria in an unmanaged and long-isolated population of Soay sheep (Ovis aries) inhabiting Hirta, in the St Kilda archipelago, 65 km west of Benbecula in the Outer Hebrides of Scotland. The sheep harbour many metazoan and protozoan parasites but their exposure to viral and bacterial pathogens is unknown. We tested for herpes viral DNA in leucocytes and found that 21 of 42 tested sheep were infected with ovine herpesvirus 2 (OHV-2). We also tested 750 plasma samples collected between 1997 and 2010 for evidence of exposure to seven other viral and bacterial agents common in domestic Scottish sheep. We found evidence of exposure toLeptospiraspp., with overall seroprevalence of 6·5%. However, serological evidence indicated that the population had not been exposed to border disease, parainfluenza, maedi-visna, or orf viruses, nor toChlamydia abortus. Some sheep tested positive for antibodies againstMycobacterium aviumsubsp.paratuberculosis(MAP) but, in the absence of retrospective faecal samples, the presence of this infection could not be confirmed. The roles of importation, the pathogen–host interaction, nematode co-infection and local transmission warrant future investigation, to elucidate the transmission ecology and fitness effects of the few viral and bacterial pathogens on Hirta.
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Partida-Martinez, Laila P., Ingrid Groth, Imke Schmitt, Walter Richter, Martin Roth, and Christian Hertweck. "Burkholderia rhizoxinica sp. nov. and Burkholderia endofungorum sp. nov., bacterial endosymbionts of the plant-pathogenic fungus Rhizopus microsporus." International Journal of Systematic and Evolutionary Microbiology 57, no. 11 (November 1, 2007): 2583–90. http://dx.doi.org/10.1099/ijs.0.64660-0.
Повний текст джерелаАнотація:
Several strains of the fungus Rhizopus microsporus harbour endosymbiotic bacteria for the production of the causal agent of rice seedling blight, rhizoxin, and the toxic cyclopeptide rhizonin. R. microsporus and isolated endobacteria were selected for freeze–fracture electron microscopy, which allowed visualization of bacterial cells within the fungal cytosol by their two parallel-running envelope membranes and by the fine structure of the lipopolysaccharide layer of the outer membrane. Two representatives of bacterial endosymbionts were chosen for phylogenetic analyses on the basis of full 16S rRNA gene sequences, which revealed that the novel fungal endosymbionts formed a monophyletic group within the genus Burkholderia. Inter-sequence similarities ranged from 98.94 to 100 %, and sequence similarities to members of the Burkholderia pseudomallei group, the closest neighbours, were 96.74–97.38 %. In addition, the bacterial strains were distinguished from their phylogenetic neighbours by their fatty acid profiles and other biochemical characteristics. The phylogenetic studies based on 16S rRNA gene sequence data, together with conclusive DNA–DNA reassociation experiments, strongly support the proposal that these strains represent two novel species within the genus Burkholderia, for which the names Burkholderia rhizoxinica sp. nov. (type strain, HKI 454T=DSM 19002T=CIP 109453T) and Burkholderia endofungorum sp. nov. (type strain, HKI 456T=DSM 19003T=CIP 109454T) are proposed.
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Burtan, Marilena, Virgilia Popa, Maria Rodica Gurau, and Doina Danes. "IDENTIFICATION OF THE AVIAN PATHOTYPE OF ESCHERICHIA COLI ON LAYER FLOCKS BY MULTIPLEX PCR." CBU International Conference Proceedings 7 (September 30, 2019): 905–11. http://dx.doi.org/10.12955/cbup.v7.1473.
Повний текст джерелаАнотація:
Introduction: Colibacillosis in poultry is determined by avian pathogenic Escherichia coli (APEC) and represents an important source of economic losses in the poultry industry. APEC’s pathogenicity relies on the presence and expression of different virulence factors. The genes ompA , iss and fimH, encoding the outer membrane protein, the protein inducing resistance to complement and the synthesis of type 1 fimbria are present in APEC strains.
Objective: Escherichia coli strains isolated from layers were analysed to assess the pathotype they belong to.
Methods: In order to detect the three genes associated with APEC strains, 16 E. coli isolates were investigated for virulence associated genes ompA, iss and fimH, using multiplex PCR.
Results: From the 16 E.coli strains submitted, multiplex PCR assessment revealed that 14 (87.5%) of the E. coli strains isolated contained at least one virulence gene, while 2 (12.5%) strains did not harbour any of the virulence genes tested. The fimH gene was noted in 13 (81.25%) of the strains tested, the ompA gene has been present in 12 (75%) strains and the iss gene was present in 9 (56.25%) strains. Eight (50%) strains were found to present all three investigated genes.
Conclusion: Presence of these genes is a strong indicatory to consider those strains as belonging to the APEC pathotype.
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NGUYEN, LUAN THANH, BENJAMIN TAPLEY, CHUNG THANH NGUYEN, HAO VAN LUONG, and JODI J. L. ROWLEY. "A new species of Leptobrachella (Anura, Megophryidae) from Mount Pu Ta Leng, northwest Vietnam." Zootaxa 5016, no. 3 (August 6, 2021): 301–32. http://dx.doi.org/10.11646/zootaxa.5016.3.1.
Повний текст джерелаАнотація:
The Hoang Lien Range in northwest Vietnam is known to harbour five species of Leptobrachella, a specious genus of terrestrial frogs. We collected specimens of Leptobrachella from Mount Pu Ta Leng on the second highest peak in the Hoang Lien Range and use morphological and molecular data to show that this population represents a previously undescribed species which we name Leptobrachella graminicola sp. nov. after the abundance of calling males on sedge-like plants. This new species is closely related to L. bourreti but the new species is distinguished from L. bourreti and other congeneric species by a combination of the following characters: (1) a body size range of 23.1–24.6 mm in six adult males and 28.6–32.9 mm in five adult females; (2) skin on dorsum smooth, with many tubercles and lacking dermal ridges; (3) toes with rudimentary webbing and broad lateral fringes; (4) belly white with brown spots; (5) throat dark brown with light grey-brown flecks and spots; (6) a row of large white spots on the outer edge of the tarsus extending from the heel to the inner metatarsal tubercle, sometimes forming a long white stripe; and (7) a bicoloured iris. The new, high-elevation species is likely to be range-restricted and threatened by habitat loss and the activities of tourists.
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Alsam, Selwa, Seok Ryoul Jeong, James Sissons, Ricky Dudley, Kwang Sik Kim, and Naveed Ahmed Khan. "Escherichia coli interactions with Acanthamoeba: a symbiosis with environmental and clinical implications." Journal of Medical Microbiology 55, no. 6 (June 1, 2006): 689–94. http://dx.doi.org/10.1099/jmm.0.46497-0.
Повний текст джерелаАнотація:
The ability of Acanthamoeba to feed on Gram-negative bacteria, as well as to harbour potential pathogens, such as Legionella pneumophila, Coxiella burnetii, Pseudomonas aeruginosa, Vibrio cholerae, Helicobacter pylori, Listeria monocytogenes and Mycobacterium avium, suggest that both amoebae and bacteria are involved in complex interactions, which may play important roles in the environment and in human health. In this study, Acanthamoeba castellanii (a keratitis isolate belonging to the T4 genotype) was used and its interactions with Escherichia coli (strain K1, a cerebrospinal fluid isolate from a meningitis patient, O18 : K1 : H7, and a K-12 laboratory strain, HB101) were studied. The invasive K1 isolate exhibited a significantly higher association with A. castellanii than the non-invasive K-12 isolate. Similarly, K1 showed significantly increased invasion and/or uptake by A. castellanii in gentamicin protection assays than the non-invasive K-12. Using several mutants derived from K1, it was observed that outer-membrane protein A (OmpA) and LPS were crucial bacterial determinants responsible for E. coli K1 interactions with A. castellanii. Once inside the cell, E. coli K1 remained viable and multiplied within A. castellanii, while E. coli K-12 was killed. Again, OmpA and LPS were crucial for E. coli K1 intracellular survival in A. castellanii. In conclusion, these findings suggest that E. coli K1 interactions with A. castellanii are carefully regulated by the virulence of E. coli.
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Neufeld, Christopher J., and A. Richard Palmer. "Precisely proportioned: intertidal barnacles alter penis form to suit coastal wave action." Proceedings of the Royal Society B: Biological Sciences 275, no. 1638 (February 5, 2008): 1081–87. http://dx.doi.org/10.1098/rspb.2007.1760.
Повний текст джерелаАнотація:
For their size, barnacles possess the longest penis of any animal (up to eight times their body length). However, as one of few sessile animals to copulate, they face a trade-off between reaching more mates and controlling ever-longer penises in turbulent flow. We observed that penises of an intertidal barnacle ( Balanus glandula ) from wave-exposed shores were shorter than, stouter than, and more than twice as massive for their length as, those from nearby protected bays. In addition, penis shape variation was tightly correlated with maximum velocity of breaking waves, and, on all shores, larger barnacles had disproportionately stouter penises. Finally, field experiments confirmed that most of this variation was due to phenotypic plasticity: barnacles transplanted to a wave-exposed outer coast produced dramatically shorter and wider penises than counterparts moved to a protected harbour. Owing to the probable trade-off between penis length and ability to function in flow, and owing to the ever-changing wave conditions on rocky shores, intertidal barnacles appear to have acquired the capacity to change the size and shape of their penises to suit local hydrodynamic conditions. This dramatic plasticity in genital form is a valuable reminder that factors other than the usual drivers of genital diversification—female choice, sexual conflict and male–male competition—can influence genital form.
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Ituarte, Cristián, Florencia Cremonte, and Agostina Scarano. "Tissue reaction of Tagelus plebeius (Bivalvia: Psammobiidae) against larval digeneans in mixohaline habitats connected to the south-western Atlantic." Journal of the Marine Biological Association of the United Kingdom 89, no. 3 (July 29, 2008): 569–77. http://dx.doi.org/10.1017/s0025315408001793.
Повний текст джерелаАнотація:
This paper describes the organism–organism relationship between a bivalve host and larval digeneans. The studied population of the stout razor clam Tagelus plebeius from the mixohaline Mar Chiquita lagoon (37° 32′S 57° 19′W) showed 100% of prevalence of infection by a larval digenean (metacercaria) of the family Gymnophallidae. The larvae occupied the extrapallial space just below the hinge of the bivalve. The tissue reaction against larval digeneans by T. plebeius consisted of hyperplasia and metaplasia of the outer layer of the mantle epithelium adjacent to parasites, forming an invagination to generate a sac that surrounded gymnophallid larvae. According to the intensity of infection, each sac progressively enlarged to harbour a variable number of larvae. In highly infected clams, a great number of sacs are formed. Eventually, the older sacs containing larvae may become closed, losing their communication with the extrapallial space and sinking into the dorsal part of the visceral mass. Larvae within sacs grow and remain alive until they reach an appropriate definitive bird vertebrate host. Older lesions commonly showed remains of dead larvae which had undergone resorption. As a result, an orange to brownish amorphous material accumulated in the space once occupied by the larvae leaving conspicuous orange marks on the inner surface of the valves. In some cases, calcifications in the form of pearls or blisters were observed.
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Mayhew, Terry M. "STEREOLOGY AND SOME STRUCTURAL CORRELATES OF RETINAL AND PHOTORECEPTOR CELL FUNCTION." Image Analysis & Stereology 27, no. 1 (May 3, 2011): 1. http://dx.doi.org/10.5566/ias.v28.p1-10.
Повний текст джерелаАнотація:
The retina is the part of the eye which detects light, transduces it into nerve impulses and plays a significant role in visual perception. Sensitivity to light is multi-factorial and depends on the properties of photopigment molecules, their synthesis and incorporation into photoreceptor membranes and the neural circuitry between photoreceptor cells, bipolar neurons and ganglion neurons. In addition, it depends on structural factors such as the absolute and relative numbers of different types of photoreceptor neurons, their subcellular morphology, their distribution across the retina and the physical dimensions (especially surface areas) and spatial arrangements of their photoreceptor membranes. At the molecular level, these membranes harbour photosensitive pigment molecules comprising transmembrane glycoproteins (opsins, which vary between photoreceptor cells) and a non-protein chromophore. Phototransduction involves a conformational change in the chromophore and activation of an opsin. A transducer G protein, transducin, lowers levels of cGMP and triggers changes in membrane ion permeability including the closure of Na+ channels. This causes the plasmalemma to become less depolarized and the relative hyperpolarization stimulates ganglion cells whose axons form the optic nerve. Phosducin is a light-regulated phosphoprotein located in inner and outer segments of rod photoreceptor cells. It modulates phototransduction by binding to beta and gamma subunits of transducin. This review briefly illustrates ways in which stereology can contribute to our understanding of these processes by providing quantitative data on photoreceptor number, disk membrane surface area and the subcellular immunolocalisation of key molecules.
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JOHNSON, JEFFREY W., and JESSICA WORTHINGTON WILMER. "Three new species of Parapercis (Perciformes: Pinguipedidae) and first records of P. muronis (Tanaka, 1918) and P. rubromaculata Ho, Chang & Shao, 2012 from Australia." Zootaxa 4388, no. 2 (March 1, 2018): 151. http://dx.doi.org/10.11646/zootaxa.4388.2.1.
Повний текст джерелаАнотація:
Three new species of pinguipedid fishes from northern Australia are described based on specimens collected by deep water demersal trawling. Parapercis algrahami sp. nov. is recorded from off Dunk Island, Qld, south to Newcastle, NSW, in 67–333 m. It is distinct in having five narrow transverse dark bars across the upper body and a dark spot dorsally on the caudal-fin base, 6 canine teeth in outer row at front of lower jaw, palatines with 1–2 rows of teeth, and predorsal scales extending far forward on the nape to the posterior portion of the interorbital region. Parapercis imamurai sp. nov. is recorded from off Saumarez Reef, Qld, south to off Coffs Harbour, NSW, in 256–405 m. It is unique in having colouration that includes a broad dusky bar from lower margin of eye across the suborbital region and three broad dusky bands crossing the body between the middle of the soft dorsal-fin and the caudal-fin base, 10 canine teeth in outer row at front of lower jaw, and the fifth dorsal-fin spine longest. Parapercis pogonoskii sp. nov. is unique in having a combination of three reddish-brown vertical bars on the upper body between the anterior and posterior portions of the soft dorsal fin, the soft dorsal fin with two large dusky blotches and caudal-fin base with a dusky blotch in the upper corner, 8–10 canine teeth in outer row at front of lower jaw, fifth dorsal-fin spine longest, angle of subopercle with a single broad spine, and angle of preopercle with 4–5 large widely-separated spines. Comparison of the mitochondrial cytochrome c oxidase subunit 1 (CO 1) genetic marker utilised in DNA barcoding produced significant genetic divergences of at least 8.1% and 14.1% between P. algrahami sp. nov. and P. pogonoskii sp. nov. respectively and their closest sampled congeners. The geographic range of Parapercis rubromaculata Ho, Chang & Shao, 2012 is extended from Taiwan to the southern hemisphere waters off Western Australia, based on specimens collected from Shark Bay, north to Ashmore Terrace, in depths of 56–107 m. A revised diagnosis for the species is presented, meristic, morphometric and DNA barcoding data for the two populations are compared, and a detailed description of the colouration of fresh and preserved specimens from Australia is provided. Previous records of Parapercis macrophthalma (Pietschmann, 1911) from Western Australia are established as misidentifications of Parapercis muronis (Tanaka, 1918) and the latter is thereby confirmed from the southern hemisphere and Australian waters for the first time. Comparative meristic, morphometric and DNA barcoding data is provided for populations of P. muronis from Japan, Philippines and Western Australia.
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Metzger, Roman, Udo Rolle, Henning C. Fiegel, Folker E. Franke, Karsten Muenstedt, and Holger Till. "C-kit receptor in the human vas deferens: distinction of mast cells, interstitial cells and interepithelial cells." REPRODUCTION 135, no. 3 (March 2008): 377–84. http://dx.doi.org/10.1530/rep-07-0346.
Повний текст джерелаАнотація:
The molecular mechanisms underlying the regulation of vas deferens (VD) motility and semen emission are still poorly understood. Interstitial cells of Cajal (ICC), which harbour the c-kit receptor (CD117), provide the basis of coordinated gut motility. We investigated whether c-kit receptor-positive cells also exist in the normal human VD. Enzyme and fluorescence immunohistochemical techniques were applied on serial sections of human proximal, middle, and distal VD segments (n=49) employing 13 different monoclonal and polyclonal antibodies recognizing the c-kit receptor. The c-kit receptor was detected in either round- or spindle-shaped cells. On account of their antigenic profile, the round- and oval-shaped c-kit receptor-positive cells were identified as mast cells (MC) occurring in all layers of the VD except the epithelium. In contrast, two distinct populations of exclusively c-kit receptor-positive spindle-shaped cells were found within the lamina propria and, rarely, in the inner and outer smooth muscle layers, as well as within the epithelium. Different shaped c-kit receptor-positive MC and IC were present in all layers of the human VD. Our findings demonstrate the presence of different c-kit receptor-positive cells also in the human VD. Their rather ubiquitous distribution within the lamina propria and muscle layers suggests that IC and MC may modulate the neuromuscular transmission and the propagation of electrical signals in multiple systems involved in the draining of fluids. The importance of the c-kit receptor-positive interepithelial cells remains unclear.
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Ivarsson, M. "Subseafloor basalts as fungal habitats." Biogeosciences 9, no. 9 (September 18, 2012): 3625–35. http://dx.doi.org/10.5194/bg-9-3625-2012.
Повний текст джерелаАнотація:
Abstract. The oceanic crust is believed to host the largest potential habitat for microbial life on Earth, yet, still we lack substantial information about the abundance, diversity, and consequence of its biosphere. The last two decades have involved major research accomplishments within this field and a change in view of the ocean crust and its potential to harbour life. Here fossilised fungal colonies in subseafloor basalts are reported from three different seamounts in the Pacific Ocean. The fungal colonies consist of various characteristic structures interpreted as fungal hyphae, fruit bodies and spores. The fungal hyphae are well preserved with morphological characteristics such as hyphal walls, septa, thallic conidiogenesis, and hyphal tips with hyphal vesicles within. The fruit bodies consist of large (∼50–200 µm in diameter) body-like structures with a defined outer membrane and an interior filled with calcite. The fruit bodies have at some stage been emptied of their contents of spores and filled by carbonate-forming fluids. A few fruit bodies not filled by calcite and with spores still within support this interpretation. Spore-like structures (ranging from a few µm to ∼20 µm in diameter) are also observed outside of the fruit bodies and in some cases concentrated to openings in the membrane of the fruit bodies. The hyphae, fruit bodies and spores are all closely associated with a crust lining the vein walls that probably represent a mineralized biofilm. The results support a fungal presence in deep subseafloor basalts and indicate that such habitats were vital between ∼81 and 48 Ma.
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WINTERBOTTOM, RICHARD. "Two new species of Trimma (Pisces; Gobiidae) from Fiji, south-western Pacific Ocean." Zootaxa 4269, no. 4 (May 24, 2017): 559. http://dx.doi.org/10.11646/zootaxa.4269.4.9.
Повний текст джерелаАнотація:
Two new species of Trimma are described from Fiji. Trimma bathum n. sp. lacks scales on the cheeks, opercle and predorsal midline, has 18–19 unbranched pectoral fin rays, an unbranched 5th pelvic fin ray that is 40–56% the length of the 4th ray, 17–18 gill rakers on the outer surface of the first gill arch, a U-shaped interorbital and a narrow slit-like postorbital trench, a low, median fleshy ridge extending half-way towards the orbit from the origin of the first dorsal fin, and, when freshly collected, a pink head and body with most body scales having an orange-brown spot or short bar at their centres. The species is currently known only from off Suva Harbour, Viti Levu, Fiji. Trimma finistrinum n. sp. has a bony interorbital equal to the pupil diameter, a fully scaled nape of 12–14 scales, a second dorsal spine that may reach posteriorly to the middle of the second dorsal fin, the papillae in the longitudinal row immediately below the eye either single or with two papillae in a vertical row, unbranched pectoral fin rays, usually a branched fifth pelvic-fin ray that is about half length of the fourth ray, and a large diffuse dark blotch on the posterior part of the caudal peduncle. A colour pattern of a brownish body with most body scales having golden- to greenish-yellow (pale in preservative) centres is unique among species of the genus. The species is currently recorded only from off the north and east coasts of Viti Levu, Fiji.
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Knight, Ian, and Noel P. James. "The stratigraphy of the Lower Ordovician St. George Group, western Newfoundland: the interaction between eustasy and tectonics." Canadian Journal of Earth Sciences 24, no. 10 (October 1, 1987): 1927–51. http://dx.doi.org/10.1139/e87-185.
Повний текст джерелаАнотація:
The St. George Group is a ~500 m thick sequence of carbonate rock that accumulated during Early and early Middle Ordovician time in a series of shallow subtidal and peritidal environments near the outer edge of a low-latitude continental margin. Lithological variations, in the form of two megacycles, reflect deposition in response to eustatic fluctuations in sea level preceding and during the early stages of Taconic orogenesis.Strata are grouped into four formations of roughly equal thickness. The newly named basal Watts Bight Formation is a lower sequence of peritidal limestones and dolostones and an upper thicker, commonly dolomitized succession of burrowed carbonates distinguished by large digitate thrombolite mounds. The overlying Boat Harbour Formation (new) is a series of muddy, peritidal, shallowing-upward sequences of limestone and dolostone. A widespread subaerial disconformity near the top of the formation, reflecting eustaic sea-level fall and the end of the first megacycle, is marked by breccia, quartz-pebble conglomerate, paleokarst, and (or) extensive dolomitization and is succeeded by higher energy peritidal limestones called the Barbace Cove Member (new). The succeeding, thick, monotonous Catoche Formation (revised) is a succession of fossiliferous subtidal limestones with scattered thrombolite mounds whose upper part is locally affected by extensive, multigeneration dolomitization and Pb–Zn mineralization. The St. George Group is capped by the newly defined Aguathuna Formation, a stack of peritidal dolostones and minor limestones and shales deposited during a period of repeated exposure and synsedimentary faulting. An erosional disconformity, resulting from regional compressional tectonics and eustatic sea-level fall, locally marks the top of the St. George and the second megacycle.
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Sotiriadis, Sotiris, Anne-Sophie Libert, and Sean N. Raymond. "Formation of terrestrial planets in eccentric and inclined giant planet systems." Astronomy & Astrophysics 613 (May 2018): A59. http://dx.doi.org/10.1051/0004-6361/201731260.
Повний текст джерелаАнотація:
Aims. Evidence of mutually inclined planetary orbits has been reported for giant planets in recent years. Here we aim to study the impact of eccentric and inclined massive giant planets on the terrestrial planet formation process, and investigate whether it can possibly lead to the formation of inclined terrestrial planets. Methods. We performed 126 simulations of the late-stage planetary accretion in eccentric and inclined giant planet systems. The physical and orbital parameters of the giant planet systems result from n-body simulations of three giant planets in the late stage of the gas disc, under the combined action of Type II migration and planet-planet scattering. Fourteen two- and three-planet configurations were selected, with diversified masses, semi-major axes (resonant configurations or not), eccentricities, and inclinations (including coplanar systems) at the dispersal of the gas disc. We then followed the gravitational interactions of these systems with an inner disc of planetesimals and embryos (nine runs per system), studying in detail the final configurations of the formed terrestrial planets. Results. In addition to the well-known secular and resonant interactions between the giant planets and the outer part of the disc, giant planets on inclined orbits also strongly excite the planetesimals and embryos in the inner part of the disc through the combined action of nodal resonance and the Lidov–Kozai mechanism. This has deep consequences on the formation of terrestrial planets. While coplanar giant systems harbour several terrestrial planets, generally as massive as the Earth and mainly on low-eccentric and low-inclined orbits, terrestrial planets formed in systems with mutually inclined giant planets are usually fewer, less massive (<0.5 M⊕), and with higher eccentricities and inclinations. This work shows that terrestrial planets can form on stable inclined orbits through the classical accretion theory, even in coplanar giant planet systems emerging from the disc phase.
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Kuo, Shih-Duenn. "SHORE PROTECTION OF KAOHSIUNG HARBOR OUTER BREAKWATER." Coastal Engineering Proceedings 1, no. 21 (January 29, 1988): 214. http://dx.doi.org/10.9753/icce.v21.214.
Повний текст джерелаАнотація:
As shown in Fig.l the main fairway of Port of Kaohsiung is running from north to south with a length of 12 kilometers. To the west, there is a sand bar served as a natural breakwater, the so called outer Breakwater, to provide the port and resident's property the necessary safety and security. Recently, due to rapid growth of container traffic and bulk cargo transportation, Port of Kaohsiung has developed some parts of the outer breakwater near the 2nd Harbor Entrance as Container Terminal No.4 with seven 14-meter-deep, 320-meter-long container berths and about 100 hectares container yard on northern side, and coal Terminal with 16-meter-deep, 320-meter-long berth and a huge storage yard on southern side. Therefore, the shore protection along the area become more and more important year by year. So far, some 6-kilometer seawall and 20 groynes have built successively, and already played a very important role for the shore protection there.
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Almenara, J. M., R. F. Díaz, G. Hébrard, R. Mardling, C. Damiani, A. Santerne, F. Bouchy, et al. "SOPHIE velocimetry of Kepler transit candidates." Astronomy & Astrophysics 615 (July 2018): A90. http://dx.doi.org/10.1051/0004-6361/201732500.
Повний текст джерелаАнотація:
Kepler-419 is a planetary system discovered by the Kepler photometry which is known to harbour two massive giant planets: an inner 3 MJ transiting planet with a 69.8-day period, highly eccentric orbit, and an outer 7.5 MJ non-transiting planet predicted from the transit-timing variations (TTVs) of the inner planet b to have a 675-day period, moderately eccentric orbit. Here we present new radial velocity (RV) measurements secured over more than two years with the SOPHIE spectrograph, where both planets are clearly detected. The RV data is modelled together with the Kepler photometry using a photodynamical model. The inclusion of velocity information breaks the MR−3 degeneracy inherent in timing data alone, allowing us to measure the absolute stellar and planetary radii and masses. With uncertainties of 12 and 13% for the stellar and inner planet radii, and 35, 24, and 35% for the masses of the star, planet b, and planet c, respectively, these measurements are the most precise to date for a single host star system using this technique. The transiting planet mass is determined at better precision than the star mass. This shows that modelling the radial velocities and the light curve together in systems of dynamically interacting planets provides a way of characterising both the star and the planets without being limited by knowledge of the star. On the other hand, the period ratio and eccentricities place the Kepler-419 system in a sweet spot; had around twice as many transits been observed, the mass of the transiting planet could have been measured using its own TTVs. Finally, the origin of the Kepler-419 system is discussed. We show that the system is near a coplanar high-eccentricity secular fixed point, related to the alignment of the orbits, which has prevented the inner orbit from circularising. For most other relative apsidal orientations, planet b’s orbit would be circular with a semi-major axis of 0.03 au. This suggests a mechanism for forming hot Jupiters in multiplanetary systems without the need of high mutual inclinations.
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Koppelman, Helmer H., Amina Helmi, Davide Massari, Sebastian Roelenga, and Ulrich Bastian. "Characterization and history of the Helmi streams with Gaia DR2." Astronomy & Astrophysics 625 (April 29, 2019): A5. http://dx.doi.org/10.1051/0004-6361/201834769.
Повний текст джерелаАнотація:
Context. The halo of the Milky Way has long been hypothesized to harbour significant amounts of merger debris. For more than a decade this view has been supported by wide-field photometric surveys which have revealed the outer halo to be lumpy. Aims. The recent release of Gaia DR2 is allowing us to establish that mergers also have been important and possibly built up the majority of the inner halo. In this work we focus on the Helmi streams, a group of streams crossing the solar vicinity and known for almost two decades. We characterize their properties and relevance for the build-up of the Milky Way’s halo. Methods. We identify new members of the Helmi streams in an unprecedented dataset with full phase-space information combining Gaia DR2, and the APOGEE DR2, RAVE DR5, and LAMOST DR4 spectroscopic surveys. Based on the orbital properties of the stars, we find new stream members up to a distance of 5 kpc from the Sun, which we characterized using photometry and metallicity information. We also perform N-body experiments to constrain the time of accretion and properties of the progenitor of the streams. Results. We find nearly 600 new members of the Helmi streams. Their HR diagram reveals a broad age range, from ≈11 to 13 Gyr, while their metallicity distribution goes from −2.3 to −1.0, and peaks at [Fe/H] ∼ −1.5. These findings confirm that the streams originate in a dwarf galaxy. Furthermore, we find seven globular clusters to be likely associated, and which follow a well-defined age-metallicity sequence whose properties suggest a relatively massive progenitor object. Our N-body simulations favour a system with a stellar mass of ∼108 M⊙ accreted 5 − 8 Gyr ago. Conclusions. The debris from the Helmi streams is an important donor to the Milky Way halo, contributing ≈15% of its mass in field stars and 10% of its globular clusters.
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Riener, M., C. M. Faesi, J. Forbrich, and C. J. Lada. "Gathering dust: A galaxy-wide study of dust emission from cloud complexes in NGC 300." Astronomy & Astrophysics 612 (April 2018): A81. http://dx.doi.org/10.1051/0004-6361/201730738.
Повний текст джерелаАнотація:
Aims. We use multi-band observations by the Herschel Space Observatory to study the dust emission properties of the nearby spiral galaxy NGC 300. We compile a first catalogue of the population of giant dust clouds (GDCs) in NGC 300, including temperature and mass estimates, and give an estimate of the total dust mass of the galaxy. Methods. We carried out source detection with the multiwavelength source extraction algorithm getsources. We calculated physical properties, including mass and temperature, of the GDCs from five-band Herschel PACS and SPIRE observations from 100 to 500 μm; the final size and mass estimates are based on the observations at 250 μm that have an effective spatial resolution of ~170 pc. We correlated our final catalogue of GDCs to pre-existing catalogues of HII regions to infer the number of GDCs associated with high-mass star formation and determined the Hα emission of the GDCs. Results. Our final catalogue of GDCs includes 146 sources, 90 of which are associated with known HII regions. We find that the dust masses of the GDCs are completely dominated by the cold dust component and range from ~1.1 × 103 to 1.4 × 104 M⊙. The GDCs have effective temperatures of ~13–23 K and show a distinct cold dust effective temperature gradient from the centre towards the outer parts of the stellar disk. We find that the population of GDCs in our catalogue constitutes ~16% of the total dust mass of NGC 300, which we estimate to be about 5.4 × 106 M⊙. At least about 87% of our GDCs have a high enough average dust mass surface density to provide sufficient shielding to harbour molecular clouds. We compare our results to previous pointed molecular gas observations in NGC 300 and results from other nearby galaxies and also conclude that it is very likely that most of our GDCs are associated with complexes of giant molecular clouds.
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Patterson III, William A., Julie A. Richburg, Kennedy H. Clark, and Sally Shaw. "Paleoecology of Calf Island in Boston's Outer Harbor." Northeastern Naturalist 12, sp3 (July 2005): 31–48. http://dx.doi.org/10.1656/1092-6194(2005)12[31:pociib]2.0.co;2.
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Plakida, M. �. "Waves on distorted models of outer harbors." Hydrotechnical Construction 20, no. 3 (March 1986): 152–54. http://dx.doi.org/10.1007/bf01431878.
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Melching, C. S., V. Novotny, and J. B. Schilling. "Probabilistic evaluation of ammonia toxicity in Milwaukee's Outer Harbor." Water Science and Technology 53, no. 1 (January 1, 2006): 109–16. http://dx.doi.org/10.2166/wst.2006.013.
Повний текст джерелаАнотація:
Water-quality models that are simple yet sound and reliable and that correspond to water-quality criteria that include magnitude, frequency, and duration components are needed. Monte Carlo models are developed on the basis of available flow and water-quality data and a deterministic water-quality model appropriate for the problem at hand and the data available. Monte Carlo models yield time series and probability distributions of constituents of interest in conformance with water-quality criteria. The application of a Monte Carlo model to the probabilistic evaluation of ammonia toxicity in Milwaukee's Outer Harbor is presented here. Under typical operating conditions for the Jones Island Wastewater Treatment Plant, ammonia toxicity was found to not be a problem for the Outer Harbor. The Monte Carlo model then was used to determine effluent limits that would meet the ammonia toxicity criteria.