303 research outputs found

    Carybdea branchi, sp. nov., a new box jellyfish (Cnidaria: Cubozoa) from South Africa.

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    A common and conspicuous member of the medusan fauna of South Africa has been the subject of repeated taxonomic confusion. After having been mistakenly identified by earlier workers as either Carybdea alata or Tamoya haplonema, this large and colourful carybdeid is described herein as Carybdea branchi, sp. nov. It is distinguished from its congeners on numerous characters: body to about 8cm in life, densely scattered with nematocyst warts over the whole body and abaxial keels of the pedalia; a bulge or lateral thorn on the pedalial canal bend; with 2 dendritic velarial canals per octant, highly diverticulated; with a long manubrium; with greatly bushy epaulette-like phacellae, comprising 20 or more roots tightly clustered; with well developed mesenteries; and with conspicuous brownish pigmented areas over the proximal and distal regions of the pedalia and over the phacellae. A comparative table of the primary diagnostic characters of species in the genus Carybdea is given

    Ontario Ministry of Natural Resources Hearst District thermal regime stream assessment

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    Forest ecosystems today are continually under pressure from a variety of special interests including timber operations. A goal of the Ontario Ministry of Natural Resources to aid natural ecosystems by providing forest management guidelines is to assist foresters with timber operations. The Timber Management Guidelines for the Protection of Fish Habitat were developed to mitigate the harmful influences of timber operations on fish habitat and water quality. Knowledge of a stream’s thermal regime is important for assessing the effectiveness of the Area of Concern when applying the guidelines. Currently, the lack of this information in the Hearst MNR District led to the attempted use of a stream thermal stability model. The model was developed to allow users to collect only a single stream temperature at 16OOhr on a day when temperatures exceeded 24.5°C. Fifty-one stream segments were studied and temperature data were collected with automated Hobo8 loggers. The thermal stability model proved unsuccessful as the model could not be calibrated for this district

    Aggression in dementia: associated factors and impact on spousal relationships

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    Volume one contains a systematic review, an empirical paper and an executive summary. Paper one is a systematic review of research investigating factors that may contribute to the development of aggression in dementia. There was support for a complex interaction of factors, however, high quality, theory driven research is limited. Paper two is a qualitative study that explores spousal carers' perspectives on aggression in dementia within the context of their relationship. The data was analysed using Interpretative Phenomenological Analysis (IPA). Themes emerging from the data relate to how spousal carers understood, and responded to the aggression. Template Analysis (TA) was used to reveal the interplay between aggression and aspects of relationship continuity. Paper three, is an executive summary that serves as a briefing paper for the public domain

    Urban poverty and the role of UK food aid organisations in enabling segregating and transitioning spaces of food access

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    This research examines the role of food aid providers, including their spatial engagement, in seeking to alleviate urban food poverty. Current levels of urban poverty across the UK have resulted in an unprecedented demand for food aid. Yet, urban poverty responsibility increasingly shifts away from policymakers to the third sector. Building on Castilhos and Dolbec’s (2018) notion of segregating space and original qualitative research with food aid organisations, we show how social supermarkets emerge as offering a type of transitional space between the segregating spaces of foodbanks and the market spaces of mainstream food retailers. This research contributes to existing literature by establishing the concept of transitional space, an additional type of space that facilitates movement between types of spaces and particularly transitions from the segregating spaces of emergency food aid to more secure spaces of food access. In so doing, this research extends Castilhos and Dolbec’s (2018) typology of spaces, enabling a more nuanced depiction of the spatiality of urban food poverty

    Understanding Lived Experiences of Food Insecurity through a Paraliminality Lens

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    Moraes, C., McEachern, M. G., Gibbons, A. and Scullion, L. (2021). Understanding lived experiences of food poverty through a paraliminality lens. Sociology, 55(6), 1169-1190. https://doi.org/10.1177/00380385211003450. Copyright © [2021] (Copyright Holder). Reprinted by permission of SAGE Publications.This article examines lived experiences of food insecurity in the United Kingdom as a liminal phenomenon. Our research is set within the context of austerity measures, welfare reform and the precarity experienced by increasing numbers of individuals. Drawing on original qualitative data, we highlight diverse food insecurity experiences as transitional, oscillating between phases of everyday food access to requiring supplementary food, which are both empowering and reinforcing of food insecurity. We make three original contributions to existing research on food insecurity. First, we expand the scope of empirical research by conceptualising food insecurity as liminal. Second, we illuminate shared social processes and practices that intersect individual agency and structure, co-constructing people’s experiences of food insecurity. Third, we extend liminality theory by conceptualising paraliminality, a hybrid of liminal and liminoid phenomena that co-generates a persistent liminal state. Finally, we highlight policy implications that go beyond short-term emergency food access measures

    A modern description of Crambionella stuhlmanni (Scyphozoa: Rhizostomeae) from St. Lucia Estuary, South Africa

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    A new record of Crambionella stuhlmanni is reported from the east coast of South Africa. The material is described using quantitative morphological data, and mitochondrial (CO1) and nuclear (ITS-1) sequence data. The species can be diagnosed by a combination of morphological features including the presence of conical projections on velar lappets, the absence of orbicular appendages among mouthlets and the short length of the terminal club on the oral arm. Mitochondrial sequence data unambiguously delineate C. stuhlmanni as a separate species from C. orsini, and phylogenetic analyses support its placement within the monophyletic genus, Crambionell

    Benzene Toxicity and Removal in Laboratory Phytoremediation Studies

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    Hybrid Poplar Cuttings Were Shown to Impact the Fate and Transport of Subsurface Benzene, While Toxicity to the Poplars Was Not Observed. Laboratory Experiments Investigated the Toxicity Response of Poplar Cuttings to Benzene Exposure, Contaminant Distribution in Plant Tissues, Contaminant Degradation in the Soil Profile, and Contaminant Volatilization from the Soil and Plant Tissues. Two Separate Studies Were Conducted to Evaluate These Parameters. the First Study Examined the Toxicity of Benzene to Hybrid Poplar Cuttings in Batch Reactors. Poplar Cuttings Were Exposed to Various Concentrations of Benzene Contaminated Water in Two Different Types of Soil. Transpiration Rates Were Measured as an Indicator of Acute Toxicity. No Acute Toxicity Was Noted for Dose Concentrations Up to 1,000 Ppm. the Second Study Evaluated Benzene Fate and Transport. Live Poplar Cuttings and Excised Controls Were Planted in Flow-Through Reactors and Supplied with an Influent Benzene Stream to Mimic Plume Conditions. the Presence of Live Poplar Cuttings Enhanced Benzene Degradation and Decreased the Effluent Mass of Benzene. a Small Amount of Benzene Was Also Volatilized from the Plant Tissues, Providing Evidence of Plant-Enhanced Volatilization. Causes for the Higher Degradation Rates Appeared to Be Greater Microbial Populations of Benzene Degraders and a More Oxygenrich Environment. the Higher Redox Potential Observed May Be an Artifact of the Laboratory Reactor Design. the Results Obtained in This Research Combined with Previous Studies Provide Evidence that Phytoremediation Has the Potential for Effective, Efficient, and Environmentally Friendly Application at Sites Highly Contaminated with Benzene and Potentially for Other Sites Contaminated with Biodegradable Organics or Volatile Organic Compounds

    Coping with psychological distress during COVID-19: a cautionary note of self-criticalness and personal resilience among healthcare workers

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    PURPOSE: The COVID-19 pandemic resulted in immense pressure on healthcare workers (HCWs) and healthcare systems worldwide. The current multi-centre evaluation sought to explore the association between coping behaviours and levels of psychological distress among HCWs working during the initial onset of COVID-19. DESIGN/METHODOLOGY/APPROACH: Between April and July 2020 HCWs at three urban hospitals in England were invited to complete an online survey measuring personal and professional characteristics, psychological distress and coping. A principal component analysis (PCA) identified components of coping and structural equation modelling (SEM) was used to test the relationship between components of coping and psychological distress. FINDINGS: A total of 2,254 HCWs participated (77% female, 67% white, 66% in clinical roles). Three components for coping were retained in the PCA analysis: external strategies, internal strategies and self-criticalness/substance use. SEM indicated that internally based coping was associated with lower levels of psychological distress, whereas externally based coping and self-criticalness were associated with greater psychological distress. The final model accounted for 35% of the variance in psychological distress. ORIGINALITY/VALUE: This multi-centre evaluation provides unique insight into the level of psychological distress among HCWs during the initial onset of the COVID-19 pandemic (2020) and associated coping strategies. Addressing self-criticalness and supporting cognitive-based internal coping strategies among HCWs may protect against prolonged exposure to psychological distress. Findings highlight the importance of developing a culture of professional resilience among this vital workforce as a whole rather than placing pressure on an individual's personal resilience
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