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  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Marine ecology--Antarctica--Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (294 pages)
    Edition: 1st ed.
    ISBN: 9783642594199
    Language: English
    Note: Ecological Studies in the Antarctic Sea Ice Zone -- Copyright -- Foreword -- EASIZ so far Some comments on the mid-term EASIZ Symposium -- Contents -- I. Biodiversity -- Antarctic marine benthic biodiversity in a world-wide latitudinal context -- New species of benthopelagic hydromedusae from the Weddell Sea -- A study on octopod ids from the eastern Weddell Sea, Antarctica -- Diversity of reproductive features in some Antarctic polynoid and sabellid polychaetes, with a description of Demonax polarsterni sp. n. (Polychaeta, Sabellidae) -- Deep-sea polychaetes in the Weddell Sea and Drake Passage: first quantitative results -- Great differences in peracarid crustacean density between the Arctic and Antarctic deep sea -- Potential impact of the main benthic amphipods on the eastern Weddell Sea shelf ecosystem (Antarctica) -- Diversity of epibenthic habitats of gammaridean amphipods in the eastern Weddell Sea -- No evidence for slow-down of molecular substitution rates at subzero temperatures in Antarctic serolid isopods(Crustacea, Isopoda, Serolidae) -- Microscopic anatomy and ultrastructure of the digestive system of three Antarctic shrimps (Crustacea: Decapoda: Caridea) -- Synopsis of the pycnogonids from Antarctic and Subantarctic waters -- Cytogenetics of the bathydraconid fish Gymnodraco acuticeps (Perciformes, Notothenioidei) from Terra Nova Bay, Ross Sea -- Seasonal fluctuations of vagile benthos in the uppermost sublittoral of a maritime Antarctic fjord -- Assemblages of necrophagous animals off Enderby Land, East Antarctica -- II. Pelagobenthic coupling -- Are Antarctic suspension-feeding communities different from those elsewhere in the world? -- Primary production, light and vertical mixing in Potter Cove, a shallow bay in the maritime Antarctic -- Land forcing controls pelagic-benthic coupling in Adelie Cove (Terra Nova Bay, Ross Sea). , Fluxes and composition of settling particles during summer in an Antarctic shallow bay of Livingston Island, South Shetlands -- Feeding strategies and diet composition of four Antarctic cnidarian species -- Foraging behaviour of Weddell seals, and its ecological implications -- III. Ice biota and ice impact on benthic communities -- On the direct impact of ice on marine benthic communities, a review -- Biogeochemistry of platelet ice: its influence on particle flux under fast ice in the Weddell Sea, Antarctica -- Meiofauna in sea ice of the Weddell Sea (Antarctica) -- In situ oxygen microelectrode measurements of bottom-ice algal production in McMurdo Sound, Antarctica -- Recolonisation of meiofauna after catastrophic iceberg scouring in shallow Antarctic sediments -- Meiofauna response to iceberg disturbance on the Antarctic continental shelf at Kapp Norvegia (Weddell Sea) -- Quantification of iceberg impact and benthic recolonisation patterns in the Weddell Sea (Antarctica) -- The role of iceberg scours in niche separation within the Antarctic fish genus Trematomus -- IV. Ecophysiology -- Ecophysiology of Antarctic marine ectotherms: limits to life -- Acclimation of photosynthesis and pigments to seasonally changing light conditions in the endemic Antarctic red macroalga Palmaria decipiens -- Effects of solar radiation on growth and mycosporine-like amino acids content in Thalassiosira sp, an Antarctic diatom -- Distribution patterns of decapod crustaceans in polar areas: a result of magnesium regulation? -- Occurrence of the autofluorescent pigment, lipofuscin, in polar crustaceans and its potential as an age marker -- Production and respiration of Antarctic ascidians -- Temperature-dependent pH regulation in stenothermal Antarctic and eurythermal temperate eelpout (Zoarcidae): an in-vivo NMR study -- List of Referees -- Subject Index.
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  • 2
    Keywords: Marine ecology Antarctic Ocean ; Biotic communities Antarctic Ocean ; Sea ice Antarctica ; Benthos ; Konferenzschrift ; Aufsatzsammlung ; Konferenzschrift 1999 ; Antarktis ; Meereis ; Ökosystem
    Type of Medium: Book
    Pages: XV, 277 S. , Ill., graph. Darst., Kt
    ISBN: 3540432183
    DDC: 577.709167
    RVK:
    Language: English
    Note: Literaturangaben , Literaturangaben
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 17 (2001), S. 0 
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract  Objectives and Methods: Reoperations are an integral part of a cardiac surgeon's practice. We share our experience of 546 reoperations over the last 21 years to January 2000, with the focus directed towards the timing of reoperation, reducing the mortality and morbidity of reoperation and rereplacement aortic valve surgery, and understanding the important risk factors. In addition, the precise technical steps that facilitate careful successful explantation of various devices (allograft, stented and stentless xenografts, and mechanical valves) are detailed. Results: Optimal planned reoperation before deterioration to New York Heart Association Class III/IV levels and before unfavorable cardiac and comorbidity general system failure occurs has produced low mortality and morbidity as compared with first operation results. However, unfavorable delays and late rereferral result in mortality rates of up to 22% for emergency redo AVR for degenerated bioprostheses. Conclusion: Cardiac surgical units have the opportunity to establish a closer patient-surgeon relationship, which favors, when necessary, the optimal timing of reoperation. Knowledge of the more important risk factors and adherence to specific technical steps at explantation of various devices enhances satisfactory reoperation outcomes.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract  Objectives: Resternotomy is a common part of cardiac surgical practice. Associated with resternotomy are the risks of cardiac injury and catastrophic hemorrhage and the subsequent elevated morbidity and mortality in the operating room or during the postoperative period. The technique of direct vision resternotomy is safe and has fewer, if any, serious cardiac injuries. The technique, the reduced need for groin cannulation and the overall low operative mortality and morbidity are the focus of this restrospective analysis. Methods: The records of 495 patients undergoing 546 resternotomies over a 21-year period to January 2000 were reviewed. All consecutive reoperations by the one surgeon comprised patients over the age of 20 at first resternotomy: M:F 343:203, mean age 57 years (range 20 to 85, median age 60). The mean NYHA grade was 2.3 [with 67 patients (I), 273 (II), 159 (III), 43 (IV), and 4 (V classification)] with elective reoperation in 94.6%. Cardiac injury was graded into five groups and the incidence and reasons for groin cannulation estimated. The morbidity and mortality as a result of the reoperation and resternotomy were assessed. Results: The hospital/30 day mortality was 2.9% (95% CI: 1.6%-4.4%) (16 deaths) over the 21 years. First (481), second (53), and third (12) resternotomies produced 307 uncomplicated technical reopenings, 203 slower but uncomplicated procedures, 9 minor superficial cardiac lacerations, and no moderate or severe cardiac injuries. Direct vision resternotomy is crystalized into the principle that only adhesions that are visualized from below are divided and only sternal bone that is freed of adhesions is sewn. Groin exposure was never performed prophylactically for resternotomy. Fourteen patients (2.6%) had such cannulation for aortic dissection/aneurysm (9 patients), excessive sternal adherence of cardiac structures (3 patients), presurgery cardiac arrest (1 patient), and high aortic cannulation desired and not possible (1 patient). The average postop blood loss was 594 mL (95% CI:558–631) in the first 12 hours. The need to return to the operating room for control of excessive bleeding was 2% (11 patients). Blood transfusion was given in 65% of the resternotomy procedures over the 21 years (mean 854 mL: 95% Cl 765–945 mL) and 41% over the last 5 years. Conclusions: The technique of direct vision resternotomy has been associated with zero moderate or major cardiac injury/catastrophic-hemorrhage at reoperation. Few patients have required groin cannulation. In the postoperative period, there was acceptable blood loss, transfusion rates, reduced morbidity, and moderate low mortality for this potentially high risk group.
    Type of Medium: Electronic Resource
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