Peripheral Role Research Articles

THE SOCIO-ECONOMIC AND POLITICAL FOUNDATIONS OF NIGERIA’S FOREIGN POLICY DURING THE SECOND REPUBLIC: LESSONS AND ALTERNATIVES FOR THE 21ST CENTURY

This study examines the socio-economic and political foundations of Nigeria’s foreign policy during the Second Republic and their lessons in charting a new path in the 21st Century. It explores how neo-colonialism, within the context of an international capitalist economy, intensified class antagonism, socio-economic and political contradictions, which impinged negatively on the foreign policy initiatives and postures of Nigeria between 1979 and 1983. Drawing insights from the Marxist political economy approach, this fresh study departs from the common orientation of economic determinism by focusing on the complex interplay between the political, economic and social subsystems through the historical materialist approach to which little attention has hitherto been paid. The study made use of primary data through the conduct of interviews and also relied on secondary sources. The study found that the distorted and peripheral role of dependent neo-colonial Nigeria in the world capitalist economy, its sole reliance on oil and the neglect of agriculture generated socio-political and economic crises that constrained it from pursuing viable foreign policy goals during the period under study. The paper concluded that the pursuit of bold and impactful foreign policy goals by Nigeria depends on its ability to reactivate the non-oil sector of its economy, particularly the agricultural and manufacturing sectors.

Oral squamous cell carcinoma-released brain-derived neurotrophic factor contributes to oral cancer pain by peripheral tropomyosin receptor kinase B activation.

Oral cancer pain is debilitating and understanding mechanisms for it is critical to develop novel treatment strategies treatment strategies. Brain-derived neurotrophic factor (BDNF) signaling is elevated in oral tumor biopsies and is involved with tumor progression. Whether BDNF signaling in oral tumors contributes to cancer-induced pain is not known. The current study evaluates a novel peripheral role of BDNF-tropomyosin receptor kinase B (TrkB) signaling in oral cancer pain. Using human oral squamous cell carcinoma (OSCC) cells and an orthotopic mouse tongue cancer pain model, we found that BDNF levels were upregulated in superfusates and lysates of tumor tongues and that BDNF was expressed by OSCC cells themselves. Moreover, neutralization of BDNF or inhibition of TrkB activity by ANA12, within the tumor-bearing tongue reversed tumor-induced pain-like behaviors in a sex-dependent manner. Oral squamous cell carcinoma conditioned media also produced pain-like behaviors in naïve male mice that was reversed by local injection of ANA12. On a physiological level, using single-fiber tongue-nerve electrophysiology, we found that acutely blocking TrkB receptors reversed tumor-induced mechanical sensitivity of A-slow high threshold mechanoreceptors. Furthermore, single-cell reverse transcription polymerase chain reaction data of retrogradely labeled lingual neurons demonstrated expression of full-form TrkB and truncated TrkB in distinct neuronal subtypes. Last but not the least, intra-TG siRNA for TrkB also reversed tumor-induced orofacial pain behaviors. Our data suggest that TrkB activities on lingual sensory afferents are partly controlled by local release of OSCC-derived BDNF, thereby contributing to oral cancer pain. This is a novel finding and the first demonstration of a peripheral role for BDNF signaling in oral cancer pain.

Ideal or Idiosyncratic? How Women Manage Work-Family Role Conflict with Focal and Peripheral Role Senders

To provide insight into women’s approaches to managing the work-family interface, I introduce the concepts of focal and peripheral role senders and illuminate the importance of their interplay in the enactment of women’s domestic roles. At the core of my theoretical model is the process by which focal and peripheral role senders embrace or reject an ideal enactment of domestic roles and the women’s strategies women use to either acquiesce to ideal roles or acquire idiosyncratic roles. This paper examines the husband as the focal role sender, consistent with the literature’s focus and the pervasiveness of husbands in my data, and considers peripheral role senders, such as parents and in-laws, who also influence women’s role enactment, either by amplifying or muting the husband’s preferred role enactment. This research contributes to existing theory by introducing the importance of focal and peripheral role senders, illuminating how these multiple senders and their interaction influence women’s strategies to deal with role conflict, and documenting how women’s strategies subsequently influence their career trajectories.

Constitutional Guardianship in Kenya’s Bicameral Legislature

The Constitution of Kenya of 2010 adopts a bicameral legislative structure, within a devolved system of governance, consisting of the National Assembly and the Senate. In keeping with the devolved structure of government, the Senate’s legislative mandate is to a large extent confined to considering, debating and approving Bills concerning counties as well as determining the allocation of national revenue among counties and providing oversight over the national revenue allocated to the 47 county governments. Over the last ten years, Kenya has witnessed a great consolidation of power by the National Assembly at the expense of the Senate especially with regards to the roles of the chambers over the process of enacting the Division of Revenue Bill. Such consolidation of power attempts to relegate the Senate to a peripheral role within the bicameral legislative institutional structure. Consequently, the Supreme Court has asserted its advisory power and the High Court its judicial review power to mete out this inter-institutional conflict between the National Assembly and the Senate. This paper interrogates the manner Kenyan courts have discharged the contested role of serving as guardians of a legislative institution in a conflict within the bicameral legislative system. It makes the point that while courts have the authority to intervene in inter-cameral conflicts, judicial intervention should be exercised as an option of last resort, only utilised after exhaustion of the constitutionally ordained intra-parliament mediation process.

A thanatopolitical visualisation of accounting history: Giorgio Agamben and Nazi Germany

The extensive measures taken to destroy a people are facilitated by a complex matrix of interrelated actors and practices, yet there remains an underdeveloped implication of accounting in the wider moral and political imperatives. The purpose of this article is to introduce a thanatopolitical visualisation of accounting history adapted from the work of Giorgio Agamben and Michel Foucault. The theoretical triptych implicates business and accounting in the State-sanctioned financial, political and actual deaths of people. Through reference to Nazi Germany (1933–1945) and the companies Deutsche Bank and Ford Werke, the utility of the theoretical device is illustrated, and silences in accounting are given exposure through alternative accounts. Adopting a close-reading method, the peripheral yet integral role of accounting helped conceal the human cost of thanatopolitical ideology. Beyond the Holocaust example, this triptych is relevant for the exploration of other instances of thanatopolitics, such as war, natural disasters and pandemics.

Role of the Endocannabinoid System in the Adipose Tissue with Focus on Energy Metabolism.

The endocannabinoid system is involved in a wide range of processes including the control of energy acquisition and expenditure. Endocannabinoids and their receptors are present in the central nervous system but also in peripheral tissues, notably the adipose tissues. The endocannabinoid system interacts with two main hormones regulating appetite, namely leptin and ghrelin. The inhibitory effect of the cannabinoid receptor 1 (CB1) antagonist rimonabant on fat mass suggested that the endocannabinoid system can also have a peripheral action in addition to its effect on appetite reduction. Thus, several investigations have focused on the peripheral role of the endocannabinoid system in the regulation of metabolism. The white adipose tissue stores energy as triglycerides while the brown adipose tissue helps to dissipate energy as heat. The endocannabinoid system regulates several functions of the adipose tissues to favor energy accumulation. In this review we will describe the presence of the endocannabinoid system in the adipose tissue. We will survey the role of the endocannabinoid system in the regulation of white and brown adipose tissue metabolism and how the eCB system participates in obesity and metabolic diseases.

Peripheral Contribution of BDNF/TrkB signaling in Mediating Oral Cancer Pain

Background: Oral cancer pain is debilitating and understanding mechanisms for it is critical to develop treatment strategies. Brain-derived neurotrophic factor (BDNF) signaling is elevated in oral tumor biopsies and has been reported to promote tumor progression. However, whether BDNF signaling in oral tumors contributes to cancer-induced pain is not known. Therefore, the current study evaluates a novel peripheral role of BDNF/TrkB signaling in oral cancer pain. Using an orthotopic mouse tongue cancer pain model, we determine BDNF levels and expression tumor-tongue and normal tongue tissues using ELISA and immunohistochemistry. Additionally, we evaluated the effect of local administration of BDNF neutralizing Ab as well as TrkB receptor antagonist (ANA12) in reversing pain-like behaviors in vivo. Further, we identified the sensory fiber type affected by local ANA12 treatment in tumor-bearing tongues using single-fiber tongue-nerve electrophysiology and characterized TrkB isoform expression in sensory neuronal subtypes innervating mouse tongue. Our data demonstrated that BDNF levels were up-regulated in superfusates and lysates of tumor tongues over normal tongues and that BDNF was expressed by the cancer cells within the tumor. Neutralization of BDNF or inhibition of TrkB activity (ANA12) within the tumor-bearing tongue reversed tongue-tumor induced pain-like behaviors. Single-fiber recordings of tongue-nerve preparations revealed that ANA12 reversed tumor-induced mechanical sensitivity of A-slow high threshold mechanoreceptors. Single-cell RTPCR of lingual neurons demonstrated expression of full-form TrkB and truncated TrkB in distinct neuronal subtypes. Our data suggests that BDNF is released from oral cancer cells at the site of tumor growth and activates TrkB-expressing lingual sensory fibers, thereby contributing to oral cancer pain. This is a novel finding and the first demonstration of a peripheral role for BDNF signaling in oral cancer pain. Targeting BDNF signaling peripherally may prove to be an effective treatment for cancer-induced pain as well as tumorigenesis. Background: Oral cancer pain is debilitating and understanding mechanisms for it is critical to develop treatment strategies. Brain-derived neurotrophic factor (BDNF) signaling is elevated in oral tumor biopsies and has been reported to promote tumor progression. However, whether BDNF signaling in oral tumors contributes to cancer-induced pain is not known. Therefore, the current study evaluates a novel peripheral role of BDNF/TrkB signaling in oral cancer pain. Using an orthotopic mouse tongue cancer pain model, we determine BDNF levels and expression tumor-tongue and normal tongue tissues using ELISA and immunohistochemistry. Additionally, we evaluated the effect of local administration of BDNF neutralizing Ab as well as TrkB receptor antagonist (ANA12) in reversing pain-like behaviors in vivo. Further, we identified the sensory fiber type affected by local ANA12 treatment in tumor-bearing tongues using single-fiber tongue-nerve electrophysiology and characterized TrkB isoform expression in sensory neuronal subtypes innervating mouse tongue. Our data demonstrated that BDNF levels were up-regulated in superfusates and lysates of tumor tongues over normal tongues and that BDNF was expressed by the cancer cells within the tumor. Neutralization of BDNF or inhibition of TrkB activity (ANA12) within the tumor-bearing tongue reversed tongue-tumor induced pain-like behaviors. Single-fiber recordings of tongue-nerve preparations revealed that ANA12 reversed tumor-induced mechanical sensitivity of A-slow high threshold mechanoreceptors. Single-cell RTPCR of lingual neurons demonstrated expression of full-form TrkB and truncated TrkB in distinct neuronal subtypes. Our data suggests that BDNF is released from oral cancer cells at the site of tumor growth and activates TrkB-expressing lingual sensory fibers, thereby contributing to oral cancer pain. This is a novel finding and the first demonstration of a peripheral role for BDNF signaling in oral cancer pain. Targeting BDNF signaling peripherally may prove to be an effective treatment for cancer-induced pain as well as tumorigenesis.

A Causal Configuration Analysis of Payment Decision Drivers in Paid Q&A

Abstract Purpose This paper examines factors of payment decision as well as the role each factor plays in casual configurations leading to high payment intention under systematic and heuristic information processing routes. Design/methodology/approach Based on heuristic-systematic model (HSM), we propose a configurational analytic framework to investigate complex casual relationships between influencing factors and payment decision. In line with this approach, we use fuzzy-set qualitative comparative analysis (fsQCA) to analyze data crawled from Zhihu.com. Findings The number of previous consultations is a necessary element in all five equivalent configurations which lead to high intention in payment decision. The heuristic processing route plays a core role while the systematic processing route plays a peripheral role in payment decision-making process. Research limitations Research is limited in that moderating effect of professional fields has not been considered in the framework. Practical implications Configurations in results can assist managers of knowledge communities and paid Q&A service providers in the management of information elements to motivate more payment decision. Originality/value This paper is one of the few studies to apply HSM theory and fsQCA method with respect to the payment decision in paid Q&A.

Pilot study investigating diagnostic utility of serum MMP-1 and TGF-β1 in asthma in ‘real world’ clinical practice in India

AimsAt a tissue level, matrix metalloproteinase-1 (MMP-1) and transforming growth factor-beta 1 (TGF-β1) contribute to allergic airway inflammation, tissue remodelling and disease severity in asthma via different pathways. Their peripheral...

Novel peripheral role of Nurr-1/GDNF/AKT trajectory in carvedilol and/or morin hydrate hepatoprotective effect in a model of hepatic ischemia/reperfusion

Although the central role of Nurr-1/GDNF has been reviewed amply, scarce data are available on their peripheral impact. Carvedilol and morin hydrate have previously conferred their hepatic anti-fibrotic action. AimThus, our aim was to unveil the potential hepatoprotective role of carvedilol (CR) and/or morin hydrate (MH) using a hepatic 70% partial warm ischemia/reperfusion (I/R) rat model. Main methodRats were allocated into sham-operated, hepatic I/R, and I/R preceded by oral administration of CR (10 and 30 mg/kg; CR10/CR30), MH (30 mg/kg), or CR10 + MH for one week. Key findingsOn the molecular level, pretreatment with CR and/or MH increased the hepatic contents of Nurr-1, GDNF, and the protein expression of active/p-AKT. On the other hand, they inactivated GSK3β and NF-κB to increase the antioxidant enzymes (GPx, SOD, CAT). All regimens also enhanced the autophagy/lysosomal function and boosted the protein expression of beclin-1, LC3II, and TFEB. Moreover, their antiapoptotic effect was signified by increasing the anti-apoptotic molecule Bcl2 and inhibiting Bax, Bax/Bcl2 ratio, and caspase-3, effects that were confirmed by the TUNEL assay. These improvements were reflected on liver function, as they decreased serum aminotransferases and liver structural alterations induced by I/R. Despite its mild impact, CR10 showed marked improvements when combined with MH; this synergistic interaction overrides the effect of either regimen alone. SignificanceIn conclusion, CR, MH, and especially the combination regimen, conferred hepatoprotection against I/R via activating the Nurr-1/GDNF/AKT trajectory to induce autophagy/lysosomal biogenesis, inhibit GSK3β/NF-кB hub and apoptosis, and amend redox balance.

Recovering the corporate brand: lessons from an industry crisis

PurposeBuilding on crisis management studies, this study aims to advance research on brand recovery from the existing focus on product brand/customer dyad into stakeholder marketing and corporate branding.Design/methodology/approachThis study uses a single case of industry-dominant corporate brand in an enriched context through in-depth analysis of industry informant and secondary data.FindingsThe paper uncovers detail of corporate brand and stakeholder interactions directed towards recovering corporate brand and restoring trust in the industry.Research limitations/implicationsThis study offers an evidence-based framework of stakeholder interactions designed to support corporate brand recovery (CBR). The rich data are bounded within a single case.Practical implicationsFramework illustrates the importance of drawing on stakeholders in CBR, particularly in an industry crisis, emphasises trust restoration and reveals the peripheral role of customers in CBR.Social implicationsThis study points to significance of stakeholder networks, particularly in insurance and financial services, in addressing social and ethical issues related to corporate misdeeds is identified.Originality/valueThis study makes noteworthy contribution to brand recovery research in two ways: firstly, by investigating the recovery of brands at corporate level and, secondly, by detailing the interactions between corporate brand and industry stakeholders in recovering the brand within a stricken industry.

Genetic ablation of C-reactive protein gene confers resistance to obesity and insulin resistance in rats.

Besides serving as a traditional inflammatory marker, C-reactive protein (CRP) is closely associated with the development of obesity, diabetes and cardiovascular diseases as a metabolic and inflammatory marker. We hypothesise that CRP protein directly participates in the regulation of energy and glucose metabolism rather than just being a surrogate marker, and that genetic deficiency of CRP will lead to resistance to obesity and insulin resistance. Crp gene deletion was achieved by transcription activator-like effector nuclease (TALEN) technology in rats. The Crp knockout animals were placed on either a standard chow diet or a high-fat diet. Phenotypic changes in body weight, glucose metabolism, insulin sensitivity, energy expenditure and inflammation condition were examined. The central impact of CRP deficiency on leptin and insulin hypothalamic signalling, as well as glucose homeostasis, were examined via intracerebral ventricular delivery of leptin and CRP plus glucose clamp studies in the wild-type and Crp knockout rats. CRP deficiency led to a significant reduction in weight gain and food intake, elevated energy expenditure and improved insulin sensitivity after exposure to high-fat diet. Glucose clamp studies revealed enhanced hepatic insulin signalling and actions. Deficiency of CRP enhanced and prolonged the weight-reducing effect of central injected leptin and promoted the central and peripheral roles of leptin. By contrast, reinstatement of CRP into the hypothalamus of the knockout rats attenuated the effects of central leptin signalling on insulin sensitivity and peripheral glucose metabolism. This study represents the first line of genetic evidence that CRP is not merely a surrogate blood marker for inflammation and metabolic syndromes but directly regulates energy balance, body weight, insulin sensitivity and glucose homeostasis through direct regulation of leptin's central effect and hypothalamic signalling.

«Европа Карла Великого» и «Европа Петра Великого»: отечественные консерваторы о международном положении России в начале XVIII в.

The international situation of Russia and its foreign policy were a subject of discussions within the framework of various currents of public thought in the 19th century. However, Russian conservatives, concerned about the future of the country in a changing world, paid special attention to these issues. The conservative concept emerged and evolved in the course of reflections and polemics on Russia's place in the world and the relationships between foreign policy and domestic development. The emphasis in such discussions was placed on the era of Peter the Great, when Russia had become part of the system of international relations, declared its geopolitical interests and begun to implement them consistently. In fact, in Peter's time, the Westphalian system, in which Russia was assigned a clearly peripheral role, was replaced by a new European order based on the Congresses in Utrecht, Rastatt and BadenЯ(1713-1714), on the results of the Great Northern War (1700-1721) and the Treaty of Nystad (1721). Under these new conditions, Peter the Great showed not only continuity with his predecessors' policies but also outlined the main foreign policy vectors, which Russia followed throughout the 18th century and, as conservative thinkers pointed out, the whole of the 19th century.

Universalists or Utilitarianists? The Social Representation of COVID-19 Pandemic in Brazil

A fierce debate arose in Brazil on how to manage and mitigate the coronavirus disease 2019 (COVID-19) pandemic—a debate derived from a dissonant perception by society about the actual significance of the COVID-19 pandemic. The Brazilian population has divided into two contrasting philosophical approaches: the universalism—understanding life as an asset of infinite value and, therefore, more important than the country’s economic preservation—and the utilitarianism—where the focus is on the mitigation of the COVID 19 pandemic-enabled economic crisis, due to its potential devastating effect on people’s lives, thereby leaving health issues in the background. The main cause for these different sensemakings is associated with the lack of a monosemic definition for the “COVID-19 pandemic” construct. Thus, the objective of this article is to investigate the social representation of the COVID-19 pandemic in Brazil through the Social Representation Theory operationalized by the word’s evocation technique. The results show that Brazilian society privileged prophylaxis and health, via social isolation, to the detriment of the country’s economic preservation. In addition, trends emphasized by experts, such as a post-pandemic “new-normal” and the digital transformation of society, played a peripheral role in the social representation of the COVID-19 pandemic in Brazil.

Cerebrovascular amyloid angiopathy in bioengineered vessels is reduced by high‐density lipoprotein particles enriched in apolipoprotein E

AbstractBackgroundSeveral lines of evidence suggest that high‐density lipoprotein (HDL) reduces Alzheimer’s disease (AD) risk by decreasing vascular beta‐amyloid (Aβ) deposition and inflammation, however, the mechanisms by which HDL improve cerebrovascular functions relevant to AD remain poorly understood.MethodsHere we use a human bioengineered model of cerebral amyloid angiopathy (CAA) to define several mechanisms by which HDL reduces Aβ deposition within the vasculature and attenuates endothelial inflammation as measured by monocyte binding.ResultsWe demonstrate that HDL reduces vascular Aβ accumulation independently of its principal binding protein, scavenger receptor (SR)‐BI, in contrast to the SR‐BI‐dependent mechanism by which HDL prevents Aβ‐induced vascular inflammation. We describe multiple novel mechanisms by which HDL acts to reduce CAA, namely: i) altering Aβ binding to collagen‐I, ii) forming a complex with Aβ that maintains its solubility, iii) lowering collagen‐I protein levels produced by smooth‐muscle cells (SMC), and iv) attenuating Aβ uptake into SMC that associates with reduced low density lipoprotein related protein 1 (LRP1) levels. Furthermore, we show that HDL particles enriched in apolipoprotein (apo)E appear to be the major drivers of these effects, providing new insights into the peripheral role of apoE in AD, in particular, the fraction of HDL that contains apoE.ConclusionThe findings in this study identify new mechanisms by which circulating HDL, particularly HDL particles enriched in apoE, may provide vascular resilience to Aβ and shed new light on a potential role of peripherally‐acting apoE in AD.

Enacting anti-racist visualities through photo-dialogues on race in Paris

PurposeGrounded in experience of co-organizing a two-day photography-based workshop in Paris, this paper explores how photo-dialogues can facilitate anti-racist pedagogy and generative discussions about how race and racism function in marketplace contexts.Design/methodology/approachThis paper draws on the authors' involvement in a cross-national and cross-disciplinary team of scholars who worked with local community stakeholders—including activists, artists and practitioners—to discuss, theorize and photo-document issues regarding race and racism in the Parisian marketplace.FindingsThis paper contributes to the literature on visual culture studies and critical race studies as it demonstrates the potentials of photography combined with dialogue to challenge the White supremacy over archiving and visuality in the context of urban spaces. This new methodology is an opportunity to reflect on archetypes of visuality that depart from the traditional Parisian flâneur to be consistent with and reinforce anti-racist stances.Originality/valuePhotography and visual methods often play peripheral roles in anti-racist education across various disciplines and research areas, including critical marketplace studies. This paper expands understanding of the potentials of using photographic methods as part of critical and anti-racist work related to racial and racist dynamics, including issues regarding power, White supremacy and public space. It outlines the use of photographic dialogues in a context (Paris, France) where discussion of race is regularly societally discouraged. Thus, this work shifts the focus away from decontextualized research that regards race as an object, to specifically foreground understandings of racialized experiences and how the photographic gaze produces and is produced by racialized viewers.

A Different Story in the Anthropocene: Brazil’s Post-Colonial Quest for Oil (1930–1975)*

Abstract This article aims to identify new historical causes for the making of the Anthropocene (the rise of humans to a geological force) by addressing Brazil’s transformation into an oil producer and an oil-dependent country between 1930 and 1975. This example allows an escape from the essentialist explanation of the Anthropocene as the result of humans’ insatiable appetite for consumption, commonly rooted in an analysis of Western industrial society, and to focus instead on the notion of freedom in a former colony. Indeed, in the context of nation-building and modernization debates, petroleum appeared to many Brazilians as an opportunity to emancipate the country from its peripheral role as global raw material provider. The rise of petroleum gave a post-colonial sense to the nation-founding myth of Brazil’s exceptional nature, which served as romantic background for a movement towards resource sovereignty embedded into a global anti-imperialist context. In Brazil specifically, oil production became an opportunity for a process of ecological transformation that promised to rid the country of colonial landscapes of exploitation, and even appeared as a solution for stopping the unsustainable destruction of tropical forests. Ultimately, these petro-ideals of emancipation, by positively linking nature and the nation, also hindered fully detecting the scope of the pollution problems that oil was generating. As argued in the article’s conclusion, this example should rekindle the discussion about the unintended link between freedom and geological change in the analysis of Anthropocene causalities.

К вопросу о системе поджанров в средневековой католической немецкой гимнографии

This paper is an analysis of church hymns in the folk language using medieval German-speaking Catholic hymnography as a case study. Understudied by literary scholars, this phenomenon used to be in the center of attention of liturgics scholars. The only exceptions included philological and historical studies of ancient writings in the German language. The existence of church chant (German Kirchenlied) is manifested by a separate genre, which, in contrast to the views of Germanic language philologists in Germany is not a special case of the spiritual song (German Geistliches Lied). In relation to the German Middle Ages, the emergence is described of church hymns as a genre represented by the most ancient artifacts of the German language. A borderline is drawn between seemingly similar phenomena: translations of Latin hymnography into German, which did not always have liturgical / paraliturgical significance, and actual church chants. Analysis of the writings (more than one and a half thousand texts) suggests a six-part subgenre system in medieval German Catholic hymnography (translated hymns, acclamations, leisen, canticles, antiphonic chants, church readings and macaronic songs). The peripheral role of German-speaking church chants in medieval pre-reformation Germany is highlighted.

La producción del espacio social en la Amazonía brasileña a través de las represas hidroeléctricas: El caso del conflicto de Belo Monte

Durante las últimas décadas en Brasil se ha producido un incremento significativo de los conflictos hidrosociales a causa de la construcción de grandes complejos hidroeléctricos. Esta extensión de grandes proyectos de carácter extractivista en la región amazónica, sobre todo a partir de finales de la década de los años ochenta del siglo pasado, han conllevado todo un conjunto de transformaciones en las relaciones sociales, productivas y reproductivas, de cara avanzar en mecanismos para la integración regional y nacional, así como para la superación de crisis de acumulación propias de la escala global. Entre todos, por su trascendencia y dilatación en el tiempo, probablemente el que más destaca es el de la represa de Belo Monte en el río Xingú, próximo a la ciudad de Altamira. En él se ven involucrados una multiplicidad de actores (comunidades indígenas, campesinos, pescadores, el estado, Eletrobras, constructoras, instituciones supranacionales, etc) cuya disputa por el acceso a los recursos hídricos supone una modificación de la configuración de las relaciones de poder que se dan en el territorio. Este artículo, además de analizar el recorrido espacio-temporal de dicho conflicto, se propone dos objetivos adicionales. Por un lado la elaboración de un marco teórico, que conjugue las perspectivas de la producción de la naturaleza, la producción del espacio y la construcción de la escala, que pueda ser aplicado al análisis de conflictos ambientales que tienen lugar en el Sur Global. Por otro lado, y en consecuencia, a través de su empleo en el estudio de este caso particular, determinar las fortalezas y debilidades que presenta para su uso en futuros trabajos similares. De cara a ello se plantea una metodología basada en la revisión bibliográfica y el uso tanto de fuentes primarias como secundarias, mediante las cuales se puedan extraer y analizar el conjunto de prácticas, representaciones y relaciones que dan forma al conflicto en sí mismo. A su vez, el artículo se divide en cuatro partes principales: el planteamiento de articulación entre las distintas categorías y aspectos de los planteamientos teóricos para su uso en el estudio de caso; el análisis del desarrollo espacio-temporal del conflicto, desde el inicio de la planificación del proyecto hasta día de hoy; en tercer lugar se explica y detalla el papel de los actores hegemónicos en el avance de la construcción del complejo hidroeléctrico; y en última instancia se lleva a cabo la misma operación pero con los actores subalternos implicados. De entre los resultados obtenidos, destaca cómo este proyecto a nivel particular, y los macroproyectos hidroeléctricos en general en la región, han sido fundamentales para la integración económica en el marco de la extensión de las relaciones de producción capitalistas y los mecanismos para la acumulación a través de la realización del plusvalor, derivando resistencias ante este proceso de extracción. Así mismo, la perspectiva interescalar y la de la producción del espacio muestran potencialidades como marco para el estudio de conflictos ambientales, mientras que el de la producción de la naturaleza lo hace de manera parcial.

Celebrity endorsements: Investigating the interactive effects of internalization, identification and product type on consumers’ attitudes and intentions

In line with Kang and Herr's work (2006), this research questions the ELM's contention that celebrity credibility serves foremost as a peripheral element in a persuasive communication context. Nevertheless, in a different light to the Kang and Herr's ‘either-central-or-peripheral-role’ of a source characteristic, this research advances that celebrity credibility plays concomitantly central and peripheral roles in a persuasive message context depending on product involvement and brand-purchase motive. Particularly, this research uses the notions of ‘source internalization’ and ‘source identification’ (Kelman, 1961) to theorize that source credibility can have a concomitant dual role (peripheral and central) in a persuasion context. More precisely, this research investigates the interactive effects of source identification and internalization with product involvement as well as brand-purchase motives on consumers' attitudes and intentions. Source internalization is predicted to have persuasive effects in the contexts of high-involvement as well as informational products. Source identification is predicted to have persuasive effects in the context of low-involvement as well as transformational products. The findings of two experiments show that celebrity credibility acts through only a single route (i.e., only internalization has persuasive effects) uniformly across different product involvement levels and brand-purchase motive types. We interpret these results with the lens of the ‘match-up’ hypothesis (Kamins, 1990).