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  • 1
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    Unknown
    London, etc. : Periodicals Archive Online (PAO)
    British journal of psychology. 49 (1958) 144 
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK and Malden, USA : Blackwell Science Ltd
    BJOG 111 (2004), S. 0 
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objectives  To model the determinants of serious operative and post-operative complications of hysterectomy and their potential risk factors.Design  A prospective cohort of women undergoing hysterectomies for benign indications in 1994/1995, with a six-week postsurgery follow up.Population and setting  A total of 37,512 women from 276 NHS and 145 private hospitals in England, Wales and Northern Ireland, originally recruited to compare the outcomes of endometrial destruction with those of hysterectomy.Methods  Gynaecologists reported hysterectomies for non-malignant indications carried out during a 12-month period beginning in October 1994 and follow up data were obtained at outpatient follow up six weeks postsurgery. Odds ratios of severe complications by indication and method, adjusting for measured intrinsic risk factors, were calculated.Main outcome measures  Severe operative and post-operative complications.Results  Severe operative complications occurred in 3%. The risk decreased with age and increased with greater parity and history of serious illness. Women with symptomatic fibroids (4.4%, 95% CI 3.9–4.9) experienced more complications than women with dysfunctional uterine bleeding (3.6%, 3.2–3.8), adjusted odds ratio (OR) = 1.3 (95% CI 1.1–1.6). Laparoscopic procedures (6.1%) doubled the risk of operative complications of abdominal hysterectomy (3.6%) (adjusted OR = 1.9, 1.5–2.5). Post-operative complications occurred in around 1% of women, with a slight decrease with increasing age, and the strongest risk factor was a history of operative complications. Relative to dysfunctional uterine bleeding (1.0%), a higher risk for fibroids (1.2%) persisted after adjustments (RR = 1.5, 1.1–2.0). Both vaginal (1.2%) and laparoscopic (1.7%) techniques had significantly higher adjusted risks than abdominal operations (0.9%), RR = 1.4 (1.0–1.9) and RR = 1.6 (1.0–2.7). There were no operative deaths; 14 women died within the six-week postsurgery (a crude mortality rate of 3.8/1000, 2.5–6.4).Conclusions  Hysterectomy is a common, routine surgery with comparatively rare serious complications. However, younger women, women with more vascular pelvises, who undergo hysterectomy, especially laparoscopically assisted vaginal surgery for symptomatic fibroids, are at most risk of experiencing severe complications both operatively and post-operatively. Therefore, a less invasive alternative treatment for symptomatic fibroids could particularly benefit this group of women, while less invasive treatments for dysfunctional uterine bleeding, such as various methods of endometrial ablations or resections, would need to meet the current low levels of clinical complications in order to replace hysterectomy.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillian Magazines Ltd.
    Nature 415 (2002), S. 897-901 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Several analytical and numerical eruption models have provided insight into volcanic eruption behaviour, but most address plinian-type eruptions where vent conditions are quasi-steady. Only a few studies have explored the physics of short-duration vulcanian explosions with unsteady vent ...
    Type of Medium: Electronic Resource
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  • 4
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    Unknown
    London, etc. : Periodicals Archive Online (PAO)
    British journal of psychology. 46 (1955) 38 
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  • 5
    ISSN: 1437-5613
    Keywords: Key words Population dynamics ; Bactrocera ; Dacinae ; Disturbance ; Habitat preference
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Loss of rainforest because of agricultural and urban development may impact the abundance and diversity of species that are rainforest natives. Tropical fruit flies are one group of such organisms indigenous to rainforests. In southeast Queensland, a region subject to rapid urbanization, we assessed the impact of habitat disturbance on the distribution and abundance of native fruit flies. Data on four species (Bactrocera tryoni, Bactrocera neohumeralis, Bactrocera chorista, and Dacus aequalis) were gathered and analyzed over 6 months in three habitat types: suburbia, open sclerophyll forest, and rainforest. We also analyzed the data at a combined "dacine fruit fly" level incorporating all fruit fly species trapped over the period of study (as might occur in a biodiversity assessment): these included the four species already named and Bactrocera melas, Bactrocera bryoniae, Bactrocera newmani, and Dacus absonifacies. Analysis at the species level showed that the polyphagous pest species responded differently to the monophagous species. Bactrocera tryoni, which has more exotic than native hosts, was positively affected by transformation of natural habitat into suburbia whereas B. neohumeralis, which has nearly identical numbers of native and exotic hosts, was found equally across habitat types. Bactrocera chorista and Dacus aequalis, each monophagous on a species-specific rainforest host plant, were most abundant in rainforest. The analysis based on the combined data suggests that replacing rainforest with suburbia has a neutral, or even positive, effect on the abundance of fruit flies as a whole. At the species level, however, it can be seen that this is an erroneous conclusion biased by the abundance of a single pest species. Our discussion raises the issue of analyses at supraspecific levels in biodiversity and impact assessment studies.
    Type of Medium: Electronic Resource
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  • 6
    facet.materialart.
    Unknown
    Mona, Jamacia : Periodicals Archive Online (PAO)
    Caribbean quarterly. 5:3 (1958:Apr.) 142 
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 4819-4825 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The microstructure following a new martensite heat treatment has been examined,principally by high-resolution microanalytical transmission electron microscopy and by atom probetomography. The new process involves quenching to a temperature between the martensite-start (Ms)and martensite-finish (Mf) temperatures, followed by ageing either at or above, the initial quenchtemperature, whereupon carbon can partition from the supersaturated martensite phase to theuntransformed austenite phase. Thus the treatment has been termed ‘Quenching and Partitioning’(Q&P). The carbon must be protected from competing reactions, primarily carbide precipitation,during the first quench and partitioning steps, thus enabling the untransformed austenite to beenriched in carbon and largely stabilised against further decomposition to martensite upon finalquenching to room temperature. This microstructural objective is almost directly opposed toconventional quenching and tempering of martensite, which seeks to eliminate retained austeniteand where carbon supersaturation is relieved by carbide precipitation. This study focuses upon asteel composition representative of a TRIP-assisted sheet steel. The Q&P microstructure ischaracterised, paying particular attention to the prospect for controlling or suppressing carbideprecipitation by alloying, through examination of the carbide precipitation that occurs
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 4476-4481 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: High strength steels containing significant fractions of retained austenite have beendeveloped in recent years, and are the subject of growing commercial interest when associated withthe TRIP phenomenon during deformation. A new process concept “quenching and partitioning”(Q&P) has been proposed by CSM/USA, and the results show the potential to create a new kind ofsteel microstructure with controlled amounts of retained austenite, enriched by carbon partitioning.Four steels containing C, Si, Mn, Ni, Cr and Mo, were designed with variation in the Ni and Ccontent, aiming to decrease Bs temperature and to suppress carbide formation during thepartitioning treatment. Several heat-treatment procedures were performed in specimens previouslymachined for tensile testing, while x-ray diffraction was used to determine the fraction of retainedaustenite. The tensile test results showed that except for the high C high Ni alloy, most of theprocessing conditions resulted in strengths superior to those of advanced high strength steels(AHSS), although it is importantly recognized that higher alloy additions were used in this study, incomparison with conventional AHSS grades.. A variety of strength and ductility combinations wereobserved, confirming the potential of the Q&P process and illustrating the strong influence of thefinal microstructure on the mechanical properties. Experimental results for samples partitioned at400 °C indicate that higher ultimate tensile strength is associated with higher fraction of retainedaustenite for multiple heat treatments of each alloy investigated. The amount of retained austeniteobtained was generally lower than that predicted by the model. Further studies are in progress tounderstand the influence of alloying and processing parameters (time/temperature) on thepartitioning of carbon and precipitation of transition carbides
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. We describe a four-generation family with fully penetrant, autosomal dominant, congenital cataracts (ADCC), presenting with morphologically homogeneous "zonular pulverulent" cataracts (CZP) and typical early-onset phenotype. Linkage analysis was performed with a panel of polymorphic markers mapped to all genomic regions of ADCC susceptibility. Contiguous significant two-point lod scores were generated at autosomal region 13q11-q13 and further linkage and haplotype studies confined the disease locus to 13q11, supporting a previous linkage of CZP (specifically CZP3) to 13q11. Mutations in a gap-junction protein, connexin 46 (αa3 subunit or GJA3), have recently been reported as being linked to the 13q11 region. Mutational analysis of connexin 46 in our family revealed a C→T at position 560 (P187L) of the cDNA sequence creating a novel MnlI restriction site that segregated with affected members of the pedigree. This family represents a second report of CZP3 linkage to 13q and is associated with a novel mutation in the connexin 46 (GJA3) gene.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 137 (2000), S. 447-451 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The nature of heat coma was examined in the edible periwinkle Littorina littorea (L.). Duration of acclimation did not influence heat-coma temperature at 12 °C, although other acclimation temperatures were important in influencing thermal tolerance, with positive shifts in coma temperature observed in response to elevated temperatures. Previous thermal history also influenced heat-coma temperatures. Individuals subjected to repeat heat-coma events on a daily basis showed significant declines (P 〈 0.05) in coma-temperature; in contrast individuals exposed to repeat heat-coma events on a weekly basis showed no decline in thermal tolerance. Size-effects occurred at selected sites, where decreased heat-coma temperatures were recorded in large individuals.
    Type of Medium: Electronic Resource
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