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Global Health Research and Policy 2017年第1期2卷 159-170页

作者： George A.Atiim susan j.elliott Ann E.Clarke Department of Geography and Environmental Management Faculty of EnvironmentUniversity of WaterlooWaterlooOntarioCanada Department of Medicine Cumming School of MedicineUniversity of CalgaryCalgaryAlbertaCanada

Background:Globally,food allergy[FA]is considered a growing health *** much of what is known comes from developed countries,there is growing interest in the epidemiology of FA in developing regions such as sub-Saharan ***,researchers are beginning to document the incidence and prevalence of FA and *** results outlined in this paper stem from an exploratory qualitative study examining the emergence of the health risk of FA in Ghana,a country undergoing epidemiologic ***:Between june and August,2015,we conducted thirty-seven(37)semi-structured in-depth *** comprised seventeen(17)healthcare workers across 12 public and private hospitals and twenty(20)individuals with FA and families with allergic *** interviews were recorded and transcribed *** were analyzed to develop thematic areas that characterize perceptions and experiences around ***:Three key broad themes arise from this ***,FA is an emerging health risk,whose incidence is perceived to be ***,participants expressed mixed perceptions about the public health burden of ***,participants identified individual and societal factors that may be influencing FA risks and ***:Our research suggests FA is a growing but unrecognized public health *** is the need for health policies and researchers to consider the full extent of ongoing epidemiologic changes for the health of populations in developing regions.

关键词： Food allergy Chronic illness Epidemiologic transition Qualitative Ghana

Local tips, global impact: community-driven measures as avenues of promoting inclusion in the control of neglected tropical diseases: a case study in Kenya

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Infectious Diseases of Poverty 2022年第4期11卷 81-90页

作者： Elizabeth A.Ochola Diana M.S.Karanja susan j.elliott Department of Geography and Environmental Management University ofWaterlooWaterlooONCanada

Background:Neglected tropical diseases(NTDs)affect poor populations with little or no’’political voice’to influence control *** most NTDs have interventions that work,the biggest challenge remains in delivering targeted interventions to affected populations residing in areas experiencing weak health *** the upward development trends in most countries of sub-Saharan Africa(SSA),the healthcare worker to population ratio remains exceptionally low,with some areas not served at all;thus,there is a need to involve other personnel for school and community-based healthcare ***,the current community-based programs suffer from inconsistent community participation due to a lack of coordinated response,and an expanded intervention agenda that lacks context-specific solutions applicable to rural,urban,and marginalized ***:This research investigated the capacity of local communities to address the burden of *** by the social theory of human capability,the research collected primary qualitative data by conducting key informant interviews and focus group discussions of people infected or affected by *** interview data were collected and transcribed verbatim for thematic analysis using Nvivo version ***:Our findings reveal,first,a need for intersectoral collaboration between governments and affected populations for inclusive and sustainable NTD ***,a’’bottom-up’approach that enhances capacity building,sensitization,and behaviour change for improved uptake of NTD ***,the enforcement of Public Health Legislative Acts that mandates the reporting and treatment of NTDs such as ***,the establishment of support groups and counseling services to assist persons suffering from debilitating and permanent effects of ***:Our research demonstrates the importance of human agency in encouraging new forms of participation leading to the co-production of inclusive and susta

关键词： Neglected tropical diseases Control Community-driven measure Local solution Global impact Inclusion Kenya

Contribution of national bioassessment approaches for assessing ecological water security： an AUSRIVAS case study

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Frontiers of Environmental Science & Engineering 2013年第5期7卷 669-687页

作者： susan j. NICHOLS Fiona j. DYER Institute for Applied Ecology and MDBfutures CRN University of Canberra Canberra ACT 2601 Australia

River managers in Australia are managing in the face of extremes to provide security of water supply for people, production and the environment. Balancing the water requirements of people, environments and econo- mies requires that water security is viewed holistically, not just in terms of the water available for human consump- tion. Common definitions of water security focus on the needs of both humans and ecosystems for purposes such as drinking, agriculture and industrial use, and to maintain ecological values. Information about achieving water security for the environment or ecological purposes can be a challenge to interpret because the watering require- ments of key ecological processes or assets are not well understood, and the links between ecological and human values are often not obvious to water users. Yet the concepts surrounding river health are inherently linked to holistic concepts of water security. The measurement of aquatic biota provides a valuable tool for managers to understand progress toward achieving ecological water security objectives. This paper provides a comprehensive review of the reference condition approach to river health assessment, using the development of the Australian River Assessment System （AUSRIVAS） as a case study. We make the link between the biological assessment of river health and assessment of ecological water security, and suggest that such an approach provides a way of reporting that is relevant to the contribution made by ecosystems to water security. The reference condition approach, which is the condition representative of minimally disturbed sites organized by selected physical, chemical, and biological characteristics, is most important for assessing ecological water security objectives.

关键词： ecological water security biological assessment river health

Robust Adaptive Model Tracking for Distributed Parameter Control of Linear Infinite-dimensional Systems in Hilbert Space

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IEEE/CAA journal of Automatica Sinica 2014年第3期1卷 294-301页

作者： Mark j.Balas susan A.Frost the Embry-Riddle Aeronautical University the NASA Ames Research Center

This paper is focused on adaptively controlling a linear infinite-dimensional system to track a finite-dimensional reference *** a linear continuous-time infinite-dimensional plant on a Hilbert space with disturbances of known waveform but unknown amplitude and phase,we show that there exists a stabilizing direct model reference adaptive control law with the properties of certain disturbance rejection and *** plant is described by a closed,densely defined linear operator that generates a continuous semigroup of bounded operators on the Hilbert space of *** central result will show that all errors will converge to a prescribed neighborhood of zero in an infinitedimensional Hilbert *** result will not require the use of the standard Barbalat’s lemma which requires certain signals to be uniformly *** result is used to determine conditions under which a linear infinite-dimensional system can be directly adaptively controlled to follow a reference *** particular,we examine conditions for a set of ideal trajectories to exist for the tracking *** results are applied to adaptive control of general linear diffusion systems described by self-adjoint operators with compact resolvent.

关键词： Adaptation models Adaptive control Hilbert space Learning (artificial intelligence) Robustness Trajectory adaptive control algorithm adaptive theory distributed parameter system Distributed parameter systems Hilbert space trajectory Adaptation models reference model adaptive control Robustness Computer algorithms

TIC-Tox: A preliminary discussion on identifying the forcing agents of DBP-mediated toxicity of disinfected water

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journal of Environmental Sciences 2017年第8期29卷 208-216页

作者： Michael j.Plewa Elizabeth D.Wagner susan D.Richardson Safe Global Water Institute and the Department of Crop Sciences University of Illinois at Urbana-Champaign Department of Chemistry and Biochemistry University of South Carolina

The disinfection of drinking water is a major public health achievement; however, an unintended consequence of disinfection is the generation of disinfection by-products（DBPs）. Many of the identified DBPs exhibit in vitro and in vivo toxicity, generate a diversity of adverse biological effects, and may be hazards to the public health and the *** a few DBPs are regulated by several national and international agencies and it is not clear if these regulated DBPs are the forcing agents that drive the observed toxicity and their associated health effects. In this study, we combine analytical chemical and biological data to resolve the forcing agents associated with mammalian cell cytotoxicity of drinking water samples from three cities. These data suggest that the trihalomethanes（THMs） and haloacetic acids may be a small component of the overall cytotoxicity of the organic material isolated from disinfected drinking water. Chemical classes of nitrogen-containing DBPs, such as the haloacetonitriles and haloacetamides, appear to be the major forcing agents of toxicity in these samples. These findings may have important implications for the design of epidemiological studies that primarily rely on the levels of THMs to define DBP exposure among populations. The TIC-Tox approach constitutes a beginning step in the process of identifying the forcing agents of toxicity in disinfected water.

关键词： DBPs CHO cell cytotoxicity Toxicity Additivity

Cell Wall Microstructure Analysis Implicates Hemicellulose Polysaccharides in Cell Adhesion in Tomato Fruit Pericarp Parenchyma

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Molecular Plant 2009年第5期2卷 910-921页

作者： jose j. Ordaz-Ortiz susan E. Marcus j. Paul Knox Centre for Plant Sciences Faculty of Biological Sciences University of Leeds Leeds LS2 9JT United Kingdom

Methods developed to isolate intact cells from both unripe and ripe tomato fruit pericarp parenchyma have allowed the cell biological analysis of polysaccharide epitopes at the surface of separated cells. The LM7 pectic homogalacturonan epitope is a marker of the junctions of adhesion planes and intercellular spaces in parenchyma systems. The LM7 epitope persistently marked the former edge of adhesion planes at the surface of cells separated from unripe and ripened tomato fruit and also from fruits with the Cnr mutation. The LM 11 xylan epitope was associated, in sections, with cell walls lining intercellular space but the epitope was not detected at the surface of isolated cells, being lost during cell isolation. The LM15 xyloglucan epitope was present at the surface of cells isolated from unripe fruit in a pattern reflecting the former edge of cell adhesion planes/intercellular space but with gaps and apparent breaks. An equivalent pattern of LM15 epitope occurrence was revealed at the surface of cells isolated by pectate lyase action but was not present in cells isolated from ripe fruit or from Cnr fruit. In contrast to wild-type cells, the LM5 galactan and LM21 mannan epitopes occurred predominantly in positions reflecting intercellular space in Cnr, suggesting a concerted alteration in cell wall microstructure in response to this mutation. Galactanase and mannanase, along with pectic homogalacturonan-degrading enzymes, were capable of releasing cells from unripe fruit parenchyma. These observations indicate that hemicellulose polymers are present in architectural contexts reflecting cell adhesion and that several cell wall polysaccharide classes are likely to contribute to cell adhesion/cell separation in tomato fruit pericarp parenchyma.

关键词： Cell walls fruit development tomato cell adhesion cell separation polysaccharide.

Childhood Exposure to Air Pollution as a Potential Contributor of Chronic Non-Respiratory Inflammatory Disorders: A Longitudinal Prospective Cohort Study in Hamilton, Canada

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journal of Environmental Protection 2013年第8期4卷 779-788页

作者： Caroline Barakat-Haddad susan elliott David Pengelly Department of Anthropology University of Toronto Scarborough Toronto Canada Department of Medicine McMaster University Hamilton Canada Faculty of Applied Health Sciences University of Waterloo Waterloo Canada

This study examines the relationship between childhood exposure to air pollution and diagnosis with chronic non-respiratory health outcomes in adulthood. This prospective cohort study uses data collected in the 1970/1980s from 395 children, including exposure to air pollution. Over thirty years later, a survey collected data on various health outcomes, including diagnosis with arthritis, high blood pressure, long-term skin conditions, and hay fever allergies. Logistic regression modeling was performed to examine the relative contribution of childhood exposure to air pollution on chronic non-respiratory health outcomes in adulthood. Childhood exposure to SO2 emerged as a significant predictor of arthritis (OR = 2.73, 95% CI 1.20 - 6.18) and high blood pressure (OR = 2.82, 95% CI 1.23 - 6.47). Other significant predictors include respiratory symptoms during childhood, family income during childhood and adulthood, property tenure, employment status, residential exposures, life events, physical activity, and body mass index. Childhood exposure to air pollution did not emerge as a significant predictor of long-term skin conditions or hay fever allergies. Findings contribute to the debate on the health effects of air pollution, indicating that the health impacts of childhood exposure to air pollution may include chronic inflammatory disorders in adulthood.

关键词： Air Pollution Health Development Hay Fever Arthritis Hypertension Skin Diseases

Assessing the utility of dissolved organic matter photoreactivity as a predictor of in situ methylmercury concentration

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journal of Environmental Sciences 2018年第6期30卷 160-168页

作者： Sara j.Klapstein susan E.Ziegler David A.Risk Nelson j.O'Driscoll Environmental Science Program Memorial University of Newfoundland Department of Earth Sciences St. Francis Xavier University Department of Earth and Environmental Science Acadia University

Methylmercury（MeHg） bioaccumulation is a growing concern in ecosystems worldwide. The absorption of solar radiation by dissolved organic matter（DOM） and other photoreactive ligands can convert MeHg into less toxic forms of mercury through photodemethylation. In this study, spectral changes and photoreactivity of DOM were measured to assess the potential to control photoreactions and predict in situ MeHg concentration. Water samples collected from a series of lakes in southwestern Nova Scotia in june, August, and September were exposed to controlled ultraviolet-A（UV-A） radiation for up to 24 hr. Dissolved organic matter photoreactivity, measured as the loss of absorbance at 350 nm at constant UV-A irradiation, was positively dependent on the initial DOM concentration in lake waters（r^2=0.94）. This relationship was consistent over time with both DOM concentration and photoreactivity increasing from summer into fall across lakes. Lake in situ MeHg concentration was positively correlated with DOM concentration and likely catchment transport in june（r = 0.77） but not the other sampling months. Despite a consistent seasonal variation in both DOM and Fe, and their respective correlations with MeHg, no discernable seasonal trend in MeHg was observed. However, a 3-year dataset from the 6 study lakes revealed a positive correlation between DOM concentration and both Fe（r = 0.91） and MeHg concentrations（r = 0.51） suggesting a more dominant landscape mobility control on *** DOM-MeHg relationships observed in these lakes highlights the need to examine DOM photoreactivity controls on MeHg transport and availability in natural waters particularly given future climate perturbations.

关键词： Methylmercury Dissolved organic carbon Photoreactions Kejimkujik National Park Freshwater lakes

Autonomic Neuropathy in HIV: A Case Report and Review of Potential Symptoms in an Advanced-Stage, HIV Cohort

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World journal of AIDS 2012年第3期2卷 265-269页

作者： jessica Robinson-Papp Kathryn j. elliott Maria Pizzirusso susan Morgello Department of Neurology Mount Sinai School of Medicine New York USA

A woman with a seventeen-year history of HIV infection on effective antiretroviral therapy presented with signs and symptoms of distal symmetric polyneuropathy (DSP). She developed significant side effects (dizziness, nausea, edema) with medications for pain management. Chart review revealed a history of similar intolerance to multiple antiretrovirals, which was not explained by known cardiac or gastrointestinal disease or psychological factors. Specialized testing revealed the presence of an autonomic neuropathy, which provided an explanation for her medication intolerance. The patient was educated on the symptoms of autonomic neuropathy and its relationship to DSP and subsequent symptomatic medications were initiated at the lowest possible doses. Although symptom management remained challenging, the patient exhibited lower frustration and greater acceptance of medication trials. Review of 168 advanced stage HIV infected individuals demonstrated that 81% experienced at least one, and 33% three or more, symptoms potentially attributable to autonomic neuropathy. Potentially autonomic symptoms were significantly associated with the presence of symptomatic DSP. Autonomic neuropathy is difficult to diagnose without specialized testing, as its symptoms are non-specific and overlap with a large number of somatic disorders. The high prevalence of autonomic-type symptoms in chronic HIV, and their association with peripheral neuropathy, may warrant further investigation of the potential for autonomic dysfunction in individuals with HIV-related symptomatic DSP.

关键词： HIV Neuropathy Autonomic

Resolving place names in Amdo and Kham:A gazetteer for the Hengduan Mountains region of Southwest China

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植物分类学报 2006年第6期44卷 721-732页

作者： susan L. KELLEY Arnold Arboretum and Harvard University Herbaria 22 Divinity Avenue Cambridge MA 02138-2020 U.S.A.

Perhaps no region on earth presents such a confusing array of place names as does the area made up of the former provinces of Kham and Amdo in historic Tibet (Xizang). Within these areas, cities, towns, villages, mountains, lakes and other geographic features have at least two names applied to them, one Tibetan, the other Chinese. Overlying this indigenous nomenclature are the names applied by outsiders, mostly Europeans, each of whom used their native language to transliterate the names they heard or read from Tibetan or Chinese script, and names in the languages of other ethnic minorities who live within the area. Adding to the confusion are the conflicting “standards” for transliterating Tibetan and Chinese names. To resolve the inconsistencies and uncertainties of place names in this region, a multilingual gazetteer and thesaurus was prepared. The gazetteer-thesaurus was compiled to be used as a tool for correlating the often radically different names assigned to a single place or feature and to provide the geographic coordinates for each. The impetus for this project was the need to assign geographic coordinates to plant specimens collected in the area since the latter part of the 19th century up until the advent and widespread use of Global Positioning System (GPS) receivers in the 1990s. Georeferencing specimens is necessary for plotting the historical distribution of species and for more completely understanding the information contained on specimen labels. Knowing the distribution of plants is important for answering phylogenetic questions, determining local and widespread biogeographical patterns, identifying areas of unusually high diversity or endemism, and determining areas in need of special protection. The value of such a gazetteer, however, extends well beyond the field of botany. It is intended to be of use to anyone with a desire to know the nomenclatural history of places in the area and for pinpointing with a fair degree of accuracy the location

关键词： Tibet (Xizang) Amdo Kham Hengduan Mountains gazetteer biodiversity Geographic Information Systems (GIS) herbarium conservation georeferencing.