662 research outputs found

    The Values-Based Trade Agenda

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    With the increasing trade tensions between the United States and China, pressures created by Brexit, and the COVID-19 pandemic, most trade scholars have focused on rising protectionism exhibited through defensive strategies such as tariffs and export controls. However, this focus ignores the fundamental shift in international trade goals of the United States and the European Union towards a values-based trade agenda. Instead of merely focusing on free trade based on efficiency and market access, trade regulators on both sides of the Atlantic have independently pursued measures designed to address environmental sustainability and social equity. These policies resonate with their domestic constituencies and allows them to promote their values along global supply chains. These values-based agendas, however, are likely to create new trade conflicts rather than partnerships. This is due in part to the fact that the transatlantic trade relationship remains embedded in international regulatory frameworks predominantly focused on efficiency gains and cutting red tape to ease the flow of products and services. Through two comparative case studies on cosmetics and medical devices, we highlight how the promotion of competitive liberalization in transatlantic trade has not generated the promised harmonization result. Instead, it has created social and environmental inequities. The case studies point out that to incorporate social and environmental equity adjustments for vulnerable and marginalized communities, trade regulators, negotiators, and lawyers alike ought to assess the ex-ante distributive effects in regulatory cooperation and the ex-post enforcement tools of regulation of their valuesbased trade agenda

    Reviews

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    The following publications have been reviewed by the mentioned authors;Ideas Bank Design Technology: Designing & Making Book 1 - reviewed by Robert BowenAztecs - Your Move - reviewed by Bridget A. EganChanging Technology - reviewed by John Hill & Elizabeth WrightElectronic Circuits and Components/ The Parts Gallery - reviewed by Mark HudsonGCSE Design and Technology: Resistant Materials - reviewed by John DurrellGlobal contexts: an introduction for design and technology teachers - reviewed by Anne RiggsScience Resources for Key Stage 2: SATIS 8-14 Technology - reviewed by Richard AgerScience Resources for Key Stage 2: SATIS 8-14 Health - reviewed by Richard AgerScience Resources for Key Stage 2: SATIS 8-14 Materials/Transport/Environment - reviewed by Robert BowenTechnology an Enterprising Approach - reviewed by Dr Ron RichieUnderstanding Electronic Circuits CD-ROM - reviewed by Dr Rowland Dye and Phil NormanTextiles and Technology - reviewed by Jillian MellorArt and Design 97 - reviewed by Andy Brecko

    Reviews

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    The following publications have been reviewed by the mentioned authors;Design and Technology Frames - reviewed by Mark HudsonDiscoveries - reviewed by Melanie FasciatoProgressio in Primary Design and Technology - reviewed by Rob BowenPrimary Design and Technology: Introducing Birds and Conservation to the Curriculum - reviewed by Bridget A. EganFood Tables and Labelling - reviewed by Jonty KinsellaExploring Materials CD-ROM Education Pack - reviewed by Chris SnellSkills in Resistant Materials Technology - reviewed by Mark HudsonDo3D - reviewed by Les PorterDesign and Technology Textiles Foundation Course - reviewed by Helen WilsonFocus on Plastics - reviewed by Chris SnellUnderstanding Industrial Practices in Textiles Technology - reviewed by Jenny JupeDyson Education Box - reviewed by Jenny JupeEdison 3.0 - reviewed by Jean Allma

    A novel malaria vaccine candidate antigen expressed in Tetrahymena thermophila

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    Development of effective malaria vaccines is hampered by the problem of producing correctly folded Plasmodium proteins for use as vaccine components. We have investigated the use of a novel ciliate expression system, Tetrahymena thermophila, as a P. falciparum vaccine antigen platform. A synthetic vaccine antigen composed of N-terminal and C-terminal regions of merozoite surface protein-1 (MSP-1) was expressed in Tetrahymena thermophila. The recombinant antigen was secreted into the culture medium and purified by monoclonal antibody (mAb) affinity chromatography. The vaccine was immunogenic in MF1 mice, eliciting high antibody titers against both N- and C-terminal components. Sera from immunized animals reacted strongly with P. falciparum parasites from three antigenically different strains by immunofluorescence assays, confirming that the antibodies produced are able to recognize parasite antigens in their native form. Epitope mapping of serum reactivity with a peptide library derived from all three MSP-1 Block 2 serotypes confirmed that the MSP-1 Block 2 hybrid component of the vaccine had effectively targeted all three serotypes of this polymorphic region of MSP-1. This study has successfully demonstrated the use of Tetrahymena thermophila as a recombinant protein expression platform for the production of malaria vaccine antigens

    Effect of treating Schistosoma haematobium infection on Plasmodium falciparum-specific antibody responses

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    <p>Abstract</p> <p>Background</p> <p>The overlapping geographical and socio-economic distribution of malaria and helminth infection has led to several studies investigating the immunological and pathological interactions of these parasites. This study focuses on the effect of treating schistosome infections on natural human immune responses directed against plasmodia merozoite surface proteins MSP-1 (DPKMWR, MSP1<sub>19</sub>), and MSP-2 (CH150 and Dd2) which are potential vaccine candidates as well as crude malaria (schizont) and schistosome (whole worm homogenate) proteins.</p> <p>Methods</p> <p>IgG1 and IgG3 antibody responses directed against <it>Schistosoma haematobium </it>crude adult worm antigen (WWH) and <it>Plasmodium falciparum </it>antigens (merozoite surface proteins 1/2 and schizont extract), were measured by enzyme linked immunosorbent assay (ELISA) in 117 Zimbabweans (6–18 years old) exposed to <it>S. haematobium </it>and <it>P. falciparum </it>infection. These responses were measured before and after anti-helminth treatment with praziquantel to determine the effects of treatment on anti-plasmodial/schistosome responses.</p> <p>Results</p> <p>There were no significant associations between antibody responses (IgG1/IgG3) directed against <it>P. falciparum </it>and schistosomes before treatment. Six weeks after schistosome treatment there were significant changes in levels of IgG1 directed against schistosome crude antigens, plasmodia crude antigens, MSP-1<sub>19</sub>, MSP-2 (Dd2), and in IgG3 directed against MSP-1<sub>19</sub>. However, only changes in anti-schistosome IgG1 were attributable to the anti-helminth treatment.</p> <p>Conclusion</p> <p>There was no association between anti-<it>P. falciparum </it>and <it>S. haematobium antibody </it>responses in this population and <it>a</it>nti-helminth treatment affected only anti-schistosome responses and not responses against plasmodia crude antigens or MSP-1 and -2 vaccine candidates.</p

    Infrared composition of the Large Magellanic Cloud

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    The evolution of galaxies and the history of star formation in the Universe are among the most important topics in today's astrophysics. Especially, the role of small, irregular galaxies in the star-formation history of the Universe is not yet clear. Using the data from the AKARI IRC survey of the Large Magellanic Cloud at 3.2, 7, 11, 15, and 24 {\mu}m wavelengths, i.e., at the mid- and near-infrared, we have constructed a multiwavelength catalog containing data from a cross-correlation with a number of other databases at different wavelengths. We present the separation of different classes of stars in the LMC in color-color, and color-magnitude, diagrams, and analyze their contribution to the total LMC flux, related to point sources at different infrared wavelengths

    Early biomarkers and potential mediators of ventilation-induced lung injury in very preterm lambs

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    BACKGROUND: Bronchopulmonary dysplasia (BPD) is closely associated with ventilator-induced lung injury (VILI) in very preterm infants. The greatest risk of VILI may be in the immediate period after birth, when the lungs are surfactant deficient, still partially filled with liquid and not uniformly aerated. However, there have been very few studies that have examined this immediate post-birth period and identified the initial injury-related pathways that are activated. We aimed to determine if the early response genes; connective tissue growth factor (CTGF), cysteine rich-61 (CYR61) and early growth response 1 (EGR1), were rapidly induced by VILI in preterm lambs and whether ventilation with different tidal volumes caused different inflammatory cytokine and early response gene expression. METHODS: To identify early markers of VILI, preterm lambs (132 d gestational age; GA, term approximately 147 d) were resuscitated with an injurious ventilation strategy (V(T) 20 mL/kg for 15 min) then gently ventilated (5 mL/kg) for 15, 30, 60 or 120 min (n = 4 in each). To determine if early response genes and inflammatory cytokines were differentially regulated by different ventilation strategies, separate groups of preterm lambs (125 d GA; n = 5 in each) were ventilated from birth with a V(T) of 5 (VG5) or 10 mL/kg (VG10) for 135 minutes. Lung gene expression levels were compared to levels prior to ventilation in age-matched control fetuses. RESULTS: CTGF, CYR61 and EGR1 lung mRNA levels were increased approximately 25, 50 and 120-fold respectively (p < 0.05), within 30 minutes of injurious ventilation. VG5 and VG10 caused significant increases in CTGF, CYR61, EGR1, IL1- , IL-6 and IL-8 mRNA levels compared to control levels. CTGF, CYR61, IL-6 and IL-8 expression levels were higher in VG10 than VG5 lambs; although only the IL-6 and CYR61 mRNA levels reached significance. CONCLUSION: CTGF, CYR61 and EGR1 may be novel early markers of lung injury and mechanical ventilation from birth using relatively low tidal volumes may be less injurious than using higher tidal volumes

    Antibodies elicited in adults by a primary Plasmodium falciparum blood-stage infection recognize different epitopes compared with immune individuals

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    <p>Abstract</p> <p>Background</p> <p>Asexual stage antibody responses following initial <it>Plasmodium falciparum </it>infections in previously healthy adults may inform vaccine development, yet these have not been as intensively studied as they have in populations from malaria-endemic areas.</p> <p>Methods</p> <p>Serum samples were collected over a six-month period from twenty travellers having returned with falciparum malaria. Fourteen of these were malaria-naïve and six had a past history of one to two episodes of malaria. Antibodies to seven asexual stage <it>P. falciparum </it>antigens were measured by ELISA. Invasion inhibitory antibody responses to the 19kDa fragment of merozoite surface protein 1 (MSP1<sub>19</sub>) were determined.</p> <p>Results</p> <p>Short-lived antibody responses were found in the majority of the subjects. While MSP1<sub>19 </sub>antibodies were most common, MSP1 block 2 antibodies were significantly less frequent and recognized conserved domains. Antibodies to MSP2 cross-reacted to the dimorphic allelic families and anti-MSP2 isotypes were not IgG3 skewed as shown previously. MSP1<sub>19 </sub>invasion inhibiting antibodies were present in 9/20 patients. A past history of malaria did not influence the frequency of these short-lived, functional antibodies (p = 0.2, 2-tailed Fisher's exact test).</p> <p>Conclusion</p> <p>Adults infected with <it>P. falciparum </it>for the first time, develop relatively short-lived immune responses that, in the case of MSP1<sub>19</sub>, are functional. Antibodies to the polymorphic antigens studied were particularly directed to allelic family specific, non-repetitive and conserved determinants and were not IgG subclass skewed. These responses are substantially different to those found in malaria immune individuals.</p

    Virulence related sequences: insights provided by comparative genomics of Streptococcus uberis of differing virulence

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    Background: Streptococcus uberis, a Gram-positive, catalase-negative member of the family Streptococcaceae is an important environmental pathogen responsible for a significant proportion of subclinical and clinical bovine intramammary infections. Currently, the genome of only a single reference strain (0140J) has been described. Here we present a comparative analysis of complete draft genome sequences of an additional twelve S. uberis strains. Results: Pan and core genome analysis revealed the core genome common to all strains to be 1,550 genes in 1,509 orthologous clusters, complemented by 115-246 accessory genes present in one or more S. uberis strains but absent in the reference strain 0140J. Most of the previously predicted virulent genes were present in the core genome of all 13 strains but gene gain/loss was observed between the isolates in CDS associated with clustered regularly interspaced short palindromic repeats (CRISPRs), prophage and bacteriocin production. Experimental challenge experiments confirmed strain EF20 as non-virulent; only able to infect in a transient manner that did not result in clinical mastitis. Comparison of the genome sequence of EF20 with the validated virulent strain 0140J identified genes associated with virulence, however these did not relate clearly with clinical/non-clinical status of infection. Conclusion: The gain/loss of mobile genetic elements such as CRISPRs and prophage are a potential driving force for evolutionary change. This first “whole-genome” comparison of strains isolated from clinical vs non-clinical intramammary infections including the type virulent vs non-virulent strains did not identify simple gene gain/loss rules that readily explain, or be confidently associated with, differences in virulence. This suggests that a more complex dynamic determines infection potential and clinical outcome not simply gene content
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