963 research outputs found

    A New Species of Querbetia (Diptera: Tabanidae) From Peru

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    The Generic Names for Tabanidae (Diptera) Proposed by Adolfo Lutz

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    A New Genus and Species of Neotropical Horsefly (Diptera: Tabanidae)

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    Pacific Insects 9 (2): 243--256 NOTES ON NEOTROPICAL TABANIDAE (Diptera). X. THE SPECIES DESCRIBED BY J. R. SCHINER AND OTHERS

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    Abstract: Notes are given on types of 37 species of Neotropical Tabanidae described by Schiner, van der Wulp, Macquart and others. Six new synonymies and 6 new combinations are established. Types or authentic specimens of 12 species are figured. Types of all 15 Neotropical species described by Schiner are in Vienna, and I am much obliged to Dr Max Beier for the privilege of studying them. The types of two of van der Wulp's species are in Amsterdam, one in Brussels and the remaining three apparently destroyed by pests. The location of the other types is stated in the discussion of each species. The species are discussed in alphabetical order, and listed at the end of the discussion, where the valid names are given in boldface. Tabanus albidocinctus Bigot, 1892, Mem. Soc. Zool. France 5: 686, ~ ( Bresil). In 1956 I placed this species in Stenotabanus. Reexamination of the 2 syntypes in BM, which are in very poor condition, suggests that these are close to St. fumipennis KrOb., differing in apparently lacking shiny 1st antennal segment, in possessing a slightly wider and less convergent frons, w ith 3 well marked ocelli, and having basal plate of 3rd antennal segment broader. St. obscuremarginatus KrOb. is also apparently close, the antennae about the same shape, but subcallus less extensively bare and ocelli not so well developed. The antennae are pale brownish, the style darker, legs bicolored, the tibiae basally white, wing with strong appendix on fork, small clouds on all cross veins and anterior border brownish. Abdomen dark brown to blackish with a series of pale middorsal connected triangles and posterior borders of all segments pale. I give here figures of frons and an· tenna of one of the syntypes

    A new specie of Stenotabanus (Stenochlorops) (Diptera: Tabanidae) from Amazonas, Brazil, and a key to the subgenus

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    Description and figures are given tor Stenotabanus (Stenochlorops) bequaerti n. sp. from Amazonas, Brazil. Figures are included for paradoxus (Lutz) and vitripennis (Lutz), and a key to the subgenus is provided.Stenotabanus (Stenochlorops) bequaerti sp. n. do Amazonas, Brasil, é descrita e figurada. São incluídas figuras para vitripennis (Lutz) e paradoxus (Lutz) e uma chave é dada para o subgênero

    Systematic review and network meta-analysis with individual participant data on cord management at preterm birth (iCOMP): study protocol

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    Introduction Timing of cord clamping and other cord management strategies may improve outcomes at preterm birth. However, it is unclear whether benefits apply to all preterm subgroups. Previous and current trials compare various policies, including time-based or physiology-based deferred cord clamping, and cord milking. Individual participant data (IPD) enable exploration of different strategies within subgroups. Network meta-analysis (NMA) enables comparison and ranking of all available interventions using a combination of direct and indirect comparisons. Objectives (1) To evaluate the effectiveness of cord management strategies for preterm infants on neonatal mortality and morbidity overall and for different participant characteristics using IPD meta-analysis. (2) To evaluate and rank the effect of different cord management strategies for preterm births on mortality and other key outcomes using NMA. Methods and analysis Systematic searches of Medline, Embase, clinical trial registries, and other sources for all ongoing and completed randomised controlled trials comparing cord management strategies at preterm birth (before 37 weeks’ gestation) have been completed up to 13 February 2019, but will be updated regularly to include additional trials. IPD will be sought for all trials; aggregate summary data will be included where IPD are unavailable. First, deferred clamping and cord milking will be compared with immediate clamping in pairwise IPD meta-analyses. The primary outcome will be death prior to hospital discharge. Effect differences will be explored for prespecified participant subgroups. Second, all identified cord management strategies will be compared and ranked in an IPD NMA for the primary outcome and the key secondary outcomes. Treatment effect differences by participant characteristics will be identified. Inconsistency and heterogeneity will be explored. Ethics and dissemination Ethics approval for this project has been granted by the University of Sydney Human Research Ethics Committee (2018/886). Results will be relevant to clinicians, guideline developers and policy-makers, and will be disseminated via publications, presentations and media releases

    Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating'

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    The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use. In particular, it cannot be used with confidence for 'blind dating'. The compilation of isotopic data on carbonate rocks reveals a high level of inconsistency between various carbon isotope age curves constructed for Neoproteozoic seawater, caused by a relatively high frequency of both global and local delta C-13(carb) fluctuations combined with few reliable age determinations. Further complication is caused by the unresolved problem as to whether two or four glaciations, and associated negative delta C-13(carb) excursions, can be reliably documented. Carbon isotope stratigraphy cannot be used alone for geological correlation and 'blind dating'. Strontium isotope stratigraphy is a more reliable and precise tool for stratigraphic correlations and indirect age determinations. Combining strontium and carbon isotope stratigraphy, several discrete ages within the 590-544 Myr interval, and two age-groups at 660-610 and 740-690 Myr can be resolved

    Association of the 894G>T polymorphism in the endothelial nitric oxide synthase gene with risk of acute myocardial infarction

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    Background: This study was designed to investigate the association of the 894G>T polymorphism in the eNOS gene with risk of acute myocardial infarction (AMI), extent of coronary artery disease (CAD) on coronary angiography, and in-hospital mortality after AMI. Methods: We studied 1602 consecutive patients who were enrolled in the GEMIG study. The control group was comprised by 727 individuals, who were randomly selected from the general adult population. Results: The prevalence of the Asp298 variant of eNOS was not found to be significantly and independently associated with risk of AMI (RR = 1.08, 95%CI = 0.77–1.51, P = 0.663), extent of CAD on angiography (OR = 1.18, 95%CI = 0.63–2.23, P = 0.605) and in-hospital mortality (RR = 1.08, 95%CI = 0.29–4.04, P = 0.908). Conclusion: In contrast to previous reports, homozygosity for the Asp298 variant of the 894G>T polymorphism in the eNOS gene was not found to be associated with risk of AMI, extent of CAD and in-hospital mortality after AM
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