A case of ‘tachy-brady syndrome’: What is the mechanism?

A young male presented with incessant narrow QRS tachycardia and left ventricular dysfunction. 24-Holter monitoring revealed multiple episodes of sustained and nonsustained episodes of tachycardia with prolonged sinus pauses at termination. The analysis of the electrocardiogram, followed by an invasive electrophysiological study, suggested an unusual mechanism for this tachy-brady syndrome.     

Determinants of Ecological Footprints: What is the role of globalization?

This paper empirically analyzes the ecological consequences of globalization, by employing the Ecological Footprint (EF) as a proxy for human ecological demands and the KOF index of Globalization. We develop an unbalanced data set covering 146 countries over the 1981–2009 period and are thus able to address the influence of countries’ development over time. After empirically showing that globalization is an explanatory factor of ecological demands, an Extreme Bounds Analysis (EBA) identifies a robust set of impact factors. Subsequently, specific hypotheses on economic, political, social and overall globalization guide the empirical analysis. The findings suggest that economic globalization drives the EF of consumption, production, imports and exports. Social globalization correlates negatively with the EF of consumption and production, while increasing the EF of imports and exports. No effects are found for political globalization while overall globalization is positively correlated with EFs of imports and exports. The findings show that globalization may have different effects on EFs depending on the dimension (consumption, production, exports and imports) referred to.     

From Experiment to Theory: What Can We Learn from Growth Curves?

Finding an appropriate functional form to describe population growth based on key properties of a described system allows making justified predictions about future population development. This information can be of vital importance in all areas of research, ranging from cell growth to global demography. Here, we use this connection between theory and observation to pose the following question: what can we infer about intrinsic properties of a population (i.e., degree of heterogeneity, or dependence on external resources) based on which growth function best fits its growth dynamics? We investigate several nonstandard classes of multi-phase growth curves that capture different stages of population growth; these models include hyperbolic–exponential, exponential–linear, exponential–linear–saturation growth patterns. The constructed models account explicitly for the process of natural selection within inhomogeneous populations. Based on the underlying hypotheses for each of the models, we identify whether the population that it best fits by a particular curve is more likely to be homogeneous or heterogeneous, grow in a density-dependent or frequency-dependent manner, and whether it depends on external resources during any or all stages of its development. We apply these predictions to cancer cell growth and demographic data obtained from the literature. Our theory, if confirmed, can provide an additional biomarker and a predictive tool to complement experimental research.     

Lipid nanovesicles for biomedical applications: ‘What is in a name’?

Vesicles, generally defined as self-assembled structures formed by single or multiple concentric bilayers that surround an aqueous core, have been widely used for biomedical applications. They can either occur naturally (e.g. exosomes) or be produced artificially and range from the micrometric scale to the nanoscale. One the most well-known vesicle is the liposome, largely employed as a drug delivery nanocarrier. Liposomes have been modified along the years to improve physicochemical and biological features, resulting in long-circulating, ligand-targeted and stimuli-responsive liposomes, among others. In this process, new nomenclatures were reported in an extensive literature. In many instances, the new names suggest the emergence of a new nanocarrier, which have caused confusion as to whether the vesicles are indeed new entities or could simply be considered modified liposomes. Herein, we discussed the extensive nomenclature of vesicles based on the suffix “some” that are employed for drug delivery and composed of various types and proportions of lipids and others amphiphilic compounds. New names have most often been selected based on changes of vesicle lipid composition, but the payload, structural complexity (e.g. multicompartment) and new/improved proprieties (e.g. elasticity) have also inspired new vesicle names. Based on this discussion, we suggested a rational classification for vesicles.     

Ecological, practical, and political inputs into selection of weed targets: What makes a good biological control target?

The topic of ecological, practical, and political considerations in the selection of weed targets for biological control has been widely discussed during the past two decades, mostly from the perspective of insect herbivores. For conceptual and practical purposes, plant pathogens have been treated in these discussions as if they are a subset of inoculative biocontrol agents, with little said about the inherent differences between pathogens and insects as biocontrol agents or the selection of weed targets for control by the inundative, bioherbicide strategy. Herein, I attempt to address the question of what makes a good biological control target for plant pathogens used as inoculative as well as inundative agents, basing my analysis on examples from the past three decades. Despite the small number of examples available for this analysis, the following generalizations can be made: (1) Weeds with robust capacity for vegetative regeneration are more difficult to control with pathogens than those that lack this trait. (2) A plant’s growth habit is not a reliable guide for target selection; weeds that have been successfully controlled include annual and biennial herbs, perennial shrubs, perennial vines, and trees, while numerous failures have been reported irrespective of the target’s growth habit or reproductive mode. (3) It is more challenging to control species with genetic heterogeneity and capacity for introgression than genetically homogeneous and reproductively conserved species. (4) Matching the target host’s susceptibility with the candidate pathogen’s virulence is of utmost importance for biocontrol success since host–pathogen interactions at the species and subspecies levels are often governed by single-gene differences (e.g., varietal specificity). (5) Practical and political considerations are central to the selection of targets for control with pathogens. (6) Demand from influential stakeholders for control and/or for a nonchemical or economically sustainable control typically drives the initiative as well as the continuance of biocontrol projects to their completion. (7) In the case of inundative, bioherbicide agents, the continuity and ultimate implementation of a project will be dictated by the prospects of economic returns from developing and using a pathogen. (8) The stakeholders’ perceptions of the effectiveness of a biocontrol program can be unpredictable, leading to conflicting views of “success.” In the final analysis, a good weed target for control by a pathogen is one that has strong stakeholder backing and the list of available pathogens for the target suggests a possibility of acceptable control at a cost that is competitive with those of other control options. While this conclusion is also applicable to target selection for insect biocontrol agents, it is more relevant for pathogens because of limited funding and personnel available for development of pathogens and the added cost and technological complexity of implementing bioherbicides compared to classical biocontrols.     

Ecological,practical, and political inputs into selection of weed targets: What makes a good biological control target?

The topic of ecological, practical, and political considerations in the selection of weed targets for biological control has been widely discussed during the past two decades, mostly from the perspective of insect herbivores. For conceptual and practical purposes, plant pathogens have been treated in these discussions as if they are a subset of inoculative biocontrol agents, with little said about the inherent differences between pathogens and insects as biocontrol agents or the selection of weed targets for control by the inundative, bioherbicide strategy. Herein, I attempt to address the question of what makes a good biological control target for plant pathogens used as inoculative as well as inundative agents, basing my analysis on examples from the past three decades. Despite the small number of examples available for this analysis, the following generalizations can be made: (1) Weeds with robust capacity for vegetative regeneration are more difficult to control with pathogens than those that lack this trait. (2) A plant’s growth habit is not a reliable guide for target selection; weeds that have been successfully controlled include annual and biennial herbs, perennial shrubs, perennial vines, and trees, while numerous failures have been reported irrespective of the target’s growth habit or reproductive mode. (3) It is more challenging to control species with genetic heterogeneity and capacity for introgression than genetically homogeneous and reproductively conserved species. (4) Matching the target host’s susceptibility with the candidate pathogen’s virulence is of utmost importance for biocontrol success since host–pathogen interactions at the species and subspecies levels are often governed by single-gene differences (e.g., varietal specificity). (5) Practical and political considerations are central to the selection of targets for control with pathogens. (6) Demand from influential stakeholders for control and/or for a nonchemical or economically sustainable control typically drives the initiative as well as the continuance of biocontrol projects to their completion. (7) In the case of inundative, bioherbicide agents, the continuity and ultimate implementation of a project will be dictated by the prospects of economic returns from developing and using a pathogen. (8) The stakeholders’ perceptions of the effectiveness of a biocontrol program can be unpredictable, leading to conflicting views of “success.” In the final analysis, a good weed target for control by a pathogen is one that has strong stakeholder backing and the list of available pathogens for the target suggests a possibility of acceptable control at a cost that is competitive with those of other control options. While this conclusion is also applicable to target selection for insect biocontrol agents, it is more relevant for pathogens because of limited funding and personnel available for development of pathogens and the added cost and technological complexity of implementing bioherbicides compared to classical biocontrols.     

‘This is a gathering of lovers’: Islamic self-help and affective pedagogies in contemporary Singapore

In Singapore, the proliferation of Islamic classes drawing from self-help rhetoric, popular culture, the Qur'an, and Hadith allude to the increased appeal of affective pedagogies to Muslim youth. Taught by Singaporean Al-Azhar University graduates, the classes predominantly attracted university-educated, minoritized Malay Muslim women. Through the use of affective pedagogies, the teachers reframed Islamic piety to foreground three forms of love: self, divine, and romantic. Extending scholarship on racialized affect, this article interrogates the ways in which the teachers’ affective pedagogies mediated young women's anxieties within a neoliberalizing context, and the latter's negotiations of their newly acquired religious knowledge as they contended with quotidian precarities. While anthropology's foregrounding of lived materialities complicates some of the theoretical presuppositions of affect theory, the latter expands our understanding of piety projects as not merely concerned with ethical self-discipline, but entangled with broader racialization processes – especially for minoritized subjects whose capacity to transform becomes constitutive of a will to improve. By placing anthropological theory on Islamic piety in a dialogical tension with affect theory, I highlight the forms of affective religious sentiments that circulate through difference and negation, and are integral to particular sites of minoritized Muslim subject formation.     

Putting the ‘upstairs–downstairs’ into ecosystem service: What can aboveground–belowground ecology tell us?

Interactions between spatially-separated aboveground and belowground biota exert important influences on the functioning of terrestrial ecosystems. Plant root exudates and litter inputs affect root-associated and decomposer sub-communities, which, in turn, regulate nutrient availability and plant growth. Ecosystem services theoretically attributed to specific functional components of aboveground or belowground biota are, therefore, influenced by indirect (plant-mediated) interactions with the wider community. Some recent studies have considered aboveground–belowground interactions in a climate change context, with implications for altered ecosystem service provision. This review is a conceptual discussion of the mechanisms by which aboveground–belowground interactions affect specific ecosystem services: control of herbivores by natural enemies, insect pollination and nutrient mineralization by soil decomposers. While some mechanisms are well-characterized, others are poorly understood. Reducing root and shoot herbivory, in addition to the direct plant benefit, indirectly promotes antagonism of the spatially-separate herbivore by its natural enemies. Soil decomposers and mycorrhizal fungi can increase shoot herbivore performance such that control by natural enemies is weakened, or initiate bottom-up trophic cascades which strengthen antagonism of shoot herbivores. Aboveground herbivory generally stimulates nutrient cycling by decomposers. Root herbivory and mycorrhizal association both appear to increase floral attractiveness to insect pollinators. Mechanisms reflect alterations to plant growth, nutritional quality and chemical defenses. Climate change has considerable potential to alter aboveground–belowground interactions, with largely unexplored implications for biological control, pollination and soil nutrient cycling.     

‘The past is a promise to the future’: stories,persons, and the devil in Greece

Drawing on ethnography from central Greece, this article is about the way people narrate their encounters with the devil. Although it echoes the idea that life as told and life as lived are structured in the same way, it takes the argument a step further by suggesting they are structured through a narrative plot wherein the present and the future of the story-tellers pre-date the past of which their stories tell. It also foregrounds the link between this structure and a particular kind of morality which replicates the narrative logic of the stories, giving rise to an inherently relational personhood – a personhood that, just like the way in which its narration destabilizes the logic of before and after, destabilizes the distinction between self and other. Lastly, contextualizing the current economic crisis in the lives of such persons, the article suggests we need to think of it in relation to the devil and the stories people tell of him.     

The ‘tyranny of reproduction’: Could ectogenesis further women’s liberation?

This paper imagines what the liberatory possibilities of (full) ectogenesis are, insofar as it separates woman from female reproductive function. Even before use with human infants, ectogenesis productively disrupts the biological paradigm underlying current gender categories and divisions of labour. I begin by presenting a theory of women’s oppression drawn from the radical feminisms of the 1960s, which sees oppression as deeply rooted in biology. On this view, oppressive social meanings are overlaid upon biology and body, as artefacts of culture and history. I then argue that ectogenesis should be pursued to replace two modes of assisted gestation that can be seen as outgrowths of oppressive assumptions about women's function, ectogenesis should be pursued to replace two modes of assisted gestation. These are gestational surrogacy and uterine transplant, which arise partly from gendered, pronatalist, and geneticist norms. These practices are supported by assumptions about women’s identity and value. Pursuing technologies such as ectogenesis, which weaken the presumed link between biology and gender, is beneficial to (trans-inclusionary radical) feminist aims, as part of a broad project of challenging dominant power relations resting on and maintaining gender categories. By allowing the conceptual separation of female reproductive function from ‘woman’, ectogenesis raises questions about how we determine who counts in this gender identity, and also how we value those who claim the identity ‘woman’. I conclude that ectogenesis has the potential to challenge traditional patriarchal family structures, and thence all other male-dominated structures (of work, education, cultural production), allowing a reimagining of the family and society in more radical ways than we have yet achieved.     

The function of animal ‘eyespots’:Conspicuousness but not eye mimicry is key

Many animals are marked with conspicuous circular features often called 'eyespots',which intimidate predators,preventing or halting an attack.It has long been assumed that eyespots work by mimicking the eyes of larger animals,but recent experiments have indicated that conspicuousness and contrast is important in eyespot function,and not eye mimicry.We undertake two further experiments to distinguish between the conspicuousness and mimicry hypotheses,by using artificial prey presented to wild avian predators...     

The ‘Coptic question’ in post-revolutionary Egypt: citizenship,democracy, religion

Relations between the Coptic minority and the Egyptian state have gone through different stages, with Copts experiencing greater or lesser degrees of integration into, or alienation from, the social and civil fabric of Egypt. This paper traces the long and ongoing path of the Coptic community from dhimmah to citizenship, a path that is not yet concluded, with a particular focus on the relations between the Copts and Al-Azhar, especially in the transition period opened by the 25 January Revolution. New discourses among both Islamic and Christian intellectuals are examined in order to search out the conceptions of citizenship emerging both in Al-Azhar and Islamist scholars’ thought and in Coptic circles.     

What exactly is ‘local song’ in a population of ortolan buntings with a common dialect?

Previous studies have shown that ortolan buntings (Emberiza hortulana) exhibit apparent dialect variation. Neighbouring males typically share the same final phrase of a simple two-part song. Consequently, the final phrase was considered to be the dialect cue important for discriminating between males from a local population and strangers. Recently, it was shown that in an isolated and fragmented population of the ortolan buntings in Norway there was no local dialect in the above-mentioned sense. Norwegian males often had song types with different final phrases in their repertoire, and had larger repertoires and a lower level of song type sharing than in other populations. It was experimentally revealed that only local songs (L) evoked a strong response in Norwegian males, while these birds did not respond strongly to foreign (F) or hybrid songs composed of local and foreign initial and final phrases in any composition (i.e. both FL and LF songs). These results suggest that, in the Norwegian population, the final phrase of the song is not a sufficient cue for local song dialect recognition. This paper is a further study in which we tested the response of the ortolan bunting males to L, F, FL and LF songs in a typical continuous population (in Poland) in which males share the same single final phrase, i.e. have a common dialect. We found that ortolan bunting males in Poland responded with similar strength to L, FL and LF songs. The majority of males did not respond as strongly to playback of only F songs. Our results suggest that a common final phrase for a population should not be treated as the only signal of ‘locality’. Our results show clear asymmetry in response to hybrid songs with non-local phrases in different populations.