60 research outputs found

    Digging deep the oil world: corporate liability and environmental justice strategies

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    The impacts provoked by the expanding oil industry encompass environmental destruction, health impacts and violations of human rights. The increasing contamination jeopardizes safe conditions of life and destroys means of livelihood of vulnerable communities and of those relying on healthy ecosystems. Local communities, feeling that they are simply sacrificed to the oil industry, see themselves involved in social conflict. They are experiencing forms of environmental discrimination and might even face criminalisation of the protest when they stand up to defend their rights promoting the chilly effect on others who need and want to defend themselves and the environment. In fact, the number of lawsuits demanding justice for environmental, social, economical and cultural damages provoked by oil companies are increasing as well as their media visibility. Yet most outcomes are not satisfactory in tackling impacted communities claims for justice. This paper describes the most recent trends regarding oil corporations’ responsibilities and use of procedural justice by civil society through the review of emblematic legal cases

    Spoils politics and environmental struggle in the Niger Delta region of Nigeria

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    The protracted conflict in the Niger Delta communities is currently being diagnosed with a view to understanding the nature of the resource struggle. From the 1980s, the region’s cry of marginalization and exclusion from oil revenue allocation was couched in a wave of environmentalism. Environmental activism had assumed the shape of peaceful community protests against the transnational oil companies and was largely directed at ecological remediation and environmental justice. Environmentalism has now assumed new dimensions both in demands and strategy. The struggle has advanced to a low intensity conflict ostensibly against the state which has resulted in the militarization of the region. Although amnesty has been granted the militants by the federal government since October 2009 as a first step to resolving the conflict, there has been criticism trailing its framing and implementation that did not take into account some historical and socio-political antecedents of conflicts in the region. This paper revisits these and applies the greed and grievance framework to investigate the nature of the conflicts. It examines the pattern of environmentalism and discusses the complex nature of the conflicts against the curtailment of primordial motivations if environmental justice is to be achieved. Contrary to the literature, it demonstrates how grievance may manifest in greed in a mutually reinforcing pattern.Keywords: Greed, grievance, militancy, environmentalism, Niger Delta, Nigeri

    Dendritic Cells in Chronic Mycobacterial Granulomas Restrict Local Anti-Bacterial T Cell Response in a Murine Model

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    Background: Mycobacterium-induced granulomas are the interface between bacteria and host immune response. During acute infection dendritic cells (DCs) are critical for mycobacterial dissemination and activation of protective T cells. However, their role during chronic infection in the granuloma is poorly understood. Methodology/Principal Findings: We report that an inflammatory subset of murine DCs are present in granulomas induced by Mycobacteria bovis strain Bacillus Calmette-guerin (BCG), and both their location in granulomas and costimulatory molecule expression changes throughout infection. By flow cytometric analysis, we found that CD11c + cells in chronic granulomas had lower expression of MHCII and co-stimulatory molecules CD40, CD80 and CD86, and higher expression of inhibitory molecules PD-L1 and PD-L2 compared to CD11c + cells from acute granulomas. As a consequence of their phenotype, CD11c + cells from chronic lesions were unable to support the reactivation of newly-recruited, antigen 85Bspecific CD4 + IFNc + T cells or induce an IFNc response from naĂŻve T cells in vivo and ex vivo. The mechanism of this inhibition involves the PD-1:PD-L signaling pathway, as ex vivo blockade of PD-L1 and PD-L2 restored the ability of isolated CD11c + cells from chronic lesions to stimulate a protective IFNc T cell response. Conclusions/Significance: Our data suggest that DCs in chronic lesions may facilitate latent infection by down-regulating protective T cell responses, ultimately acting as a shield that promotes mycobacterium survival. This DC shield may explai

    Glucocorticosteroid-free versus glucocorticosteroid-containing immunosuppression for liver transplanted patients

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    Overview of transient liquid phase and partial transient liquid phase bonding

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    Plankton distribution and diversity: a case study of earthen fish ponds in the Obubra Campus of Cross River University of Technology

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    Our knowledge of the consumption of plankton by fish is still fragmentary. Trophic links between fish and plankton are often loose because plankton is a changing assemblage of pelagic organisms of valuable nutritional value. The objectives of the study were to determine the distribution and diversity of planktons in the fish ponds. Water samples for plankton analysis were collected monthly (January – December), along with water samples used for the determination of physico-chemical parameters in 250ml bottles in Ponds 1,2 and 5. The freshwater sample was mixed gently and pipetted into 5ml plankton chamber containing 2 drops of Lugol’s solution. The Lugol’s solution which served as fixative also enhanced sedimentation of the organisms and was left overnight before analyzing plankton using Zeiss inverted plankton microscope and plankton determination keys. Data was analyzed using Shannon-Weaner diversity index, species richness, means and analysis of varians (ANOVA).The results showed that the highest species richness for dry season  phytoplankton value of 27 was recorded in Pond 2, with the highest Shannon-Weaner diversity index value of 0.5401 in pond 5. Merismopaedia elegans with 3,434 in pond 2 was the most abundant phytoplankton species and chlorophyceae the most dominant taxa. The rainy season zooplankton species richness values (5 in pond 2) were higher than that of the dry season (3 in pond 3) with the highest Shannon-Weaner index value of 0.3501 recorded in pond 1. The most abundant  zooplankton species Asplanchna species 57 was recorded in pond 2. Significant differences (

    Sport Fisheries Potentials Of Agbokim Waterfalls, Cross River State, Nigeria

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    The study was carried out at Agbokim Waterfalls from August, 2005 to July 2006. The study area was divided into three reaches. Reach 1 (upstream), reach 2 (Waterfalls) reach 3 (Waterfalls River Basin), each reach was randomly sampled. Sampling was carried out once a month for the twelve months. The catches were sorted, identified and counted from fish landed by artisanal fishermen. Data collected was analyzed using percentages, relative abundance and diversity indices which included species richness, Simpson’s diversity index, Shannon and Weavers diversity index and their equitability (evenness). The results showed that twenty two fish species belonging to nine families were recorded. Fish catch varied from one reach to the other in terms of species composition and abundance with the highest catch in reach 3 (309) (64.9%).Total fish sampled was 476 with a total weight of 86,652.46g. The family Claridae had the highest weight 33318.17g (38.5%). Highest diversity indices were recorded in Simpson’s diversity index of 16.6111 in reach 3 and Shannon Weavers diversity index 2.7906. It followed the same pattern for species richness of 309. Equitability (evenness) results were rather highest for reach 2 (0.165) for Simpson’s index and (0.5987) for Shannon’s function
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