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"Mohan, J."
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Migration and Health in the Construction Industry: Culturally Centering Voices of Bangladeshi Workers in Singapore
Construction workers globally face disproportionate threats to health and wellbeing, constituted by the nature of the work they perform. The workplace fatalities and lost-time injuries experienced by construction workers are significantly greater than in other forms of work. This paper draws on the culture-centered approach (CCA) to dialogically articulate meanings of workplace risks and injuries, voiced by Bangladeshi migrant construction workers in Singapore. The narratives voiced by the participants suggest an ecological approach to workplace injuries in the construction industries, attending to food insecurity, lack of sleep, transportation, etc. as contextual features of work that shape the risks experienced at work. Moreover, participant voices point to the barriers in communication, lack of understanding, and experiences of incivility as features of work that constitute the ways in which they experience injury risks. The overarching discourses of productivity and efficiency constitute a broader climate of threats to worker safety and health.
Journal Article
Droplet-based lab-on-chip platform integrated with laser ablated graphene heaters to synthesize gold nanoparticles for electrochemical sensing and fuel cell applications
Controlled, stable and uniform temperature environment with quick response are crucial needs for many lab-on-chip (LOC) applications requiring thermal management. Laser Induced Graphene (LIG) heater is one such mechanism capable of maintaining a wide range of steady state temperature. LIG heaters are thin, flexible, and inexpensive and can be fabricated easily in different geometric configurations. In this perspective, herein, the electro-thermal performance of the LIG heater has been examined for different laser power values and scanning speeds. The experimented laser ablated patterns exhibited varying electrical conductivity corresponding to different combinations of power and speed of the laser. The conductivity of the pattern can be tailored by tuning the parameters which exhibit, a wide range of temperatures making them suitable for diverse lab-on-chip applications. A maximum temperature of 589 °C was observed for a combination of 15% laser power and 5.5% scanning speed. A LOC platform was realized by integrating the developed LIG heaters with a droplet-based microfluidic device. The performance of this LOC platform was analyzed for effective use of LIG heaters to synthesize Gold nanoparticles (GNP). Finally, the functionality of the synthesized GNPs was validated by utilizing them as catalyst in enzymatic glucose biofuel cell and in electrochemical applications.
Journal Article
Culture-centeredness in community-based participatory research: contributions to health education intervention research
Health education research emphasizes the importance of cultural understanding and fit to achieve meaningful psycho-social research outcomes, community responsiveness and external validity to enhance health equity. However, many interventions address cultural fit through cultural competence and sensitivity approaches that are often superficial. The purpose of this study was to better situate culture within health education by operationalizing and testing new measures of the deeply grounded culture-centered approach (CCA) within the context of community-based participatory research (CBPR). A nation-wide mixed method sample of 200 CBPR partnerships included a survey questionnaire and in-depth case studies. The questionnaire enabled the development of a CCA scale using concepts of community voice/agency, reflexivity and structural transformation. Higher-order confirmatory factor analysis demonstrated factorial validity of the scale. Correlations supported convergent validity with positive associations between the CCA and partnership processes and capacity and health outcomes. Qualitative data from two CBPR case studies provided complementary socio-cultural historic background and cultural knowledge, grounding health education interventions and research design in specific contexts and communities. The CCA scale and case study analysis demonstrate key tools that community–academic research partnerships can use to assess deeper levels of culture centeredness for health education research.
Journal Article
Migrant health as a human right amidst COVID-19: a culture-centered approach
Purpose
The purpose of this manuscript is to examine the negotiations of health among low-wage migrant workers in Singapore amidst the COVID-19 outbreaks in dormitories housing them. In doing so, the manuscript attends to the ways in which human rights are constituted amidst labor and communicative rights, constituting the backdrop against which the pandemic outbreaks take place and the pandemic response is negotiated.
Design/methodology/approach
The study is part of a long-term culture-centered ethnography conducted with low-wage migrant workers in Singapore, seeking to build communicative infrastructures for rights-based advocacy and interventions.
Findings
The findings articulate the ways in which the outbreaks in dormitories housing low-wage migrant workers are constituted amidst structural contexts of organizing migrant work in Singapore. These structural contexts of extreme neoliberalism work catalyze capitalist accumulation through the exploitation of low-wage migrant workers. The poor living conditions that constitute the outbreak are situated in relationship to the absence of labor and communicative rights in Singapore. The absence of communicative rights and dignity to livelihood constitutes the context within which the COVID-19 outbreak emerges and the ways in which it is negotiated among low-wage migrant workers in Singapore.
Originality/value
This manuscript foregrounds the interplays of labor and communicative rights in the context of the health experiences of low-wage migrant workers amidst the pandemic. Even as COVID-19 has made visible the deeply unequal societies we inhabit, the manuscript suggests the relevance of turning to communicative rights as the basis for addressing these inequalities. It contributes to the extant literature on the culture-centered approach by depicting the ways in which a pandemic as a health crisis exacerbates the challenges to health and well-being among precarious workers.
Journal Article
Soil warming alters nitrogen cycling in a New England forest: implications for ecosystem function and structure
Global climate change is expected to affect terrestrial ecosystems in a variety of ways. Some of the more well-studied effects include the biogeochemical feedbacks to the climate system that can either increase or decrease the atmospheric load of greenhouse gases such as carbon dioxide and nitrous oxide. Less well-studied are the effects of climate change on the linkages between soil and plant processes. Here, we report the effects of soil warming on these linkages observed in a large field manipulation of a deciduous forest in southern New England, USA, where soil was continuously warmed 5°C above ambient for 7 years. Over this period, we have observed significant changes to the nitrogen cycle that have the potential to affect tree species composition in the long term. Since the start of the experiment, we have documented a 45% average annual increase in net nitrogen mineralization and a three-fold increase in nitrification such that in years 5 through 7, 25% of the nitrogen mineralized is then nitrified. The warming-induced increase of available nitrogen resulted in increases in the foliar nitrogen content and the relative growth rate of trees in the warmed area.Acer rubrum (red maple) trees have responded the most after 7 years of warming, with the greatest increases in both foliar nitrogen content and relative growth rates. Our study suggests that considering species-specific responses to increases in nitrogen availability and changes in nitrogen form is important in predicting future forest composition and feedbacks to the climate system.
Journal Article
The United Nations (UN) Card, Identity, and Negotiations of Health among Rohingya Refugees
Being persecuted and expelled from Myanmar, Rohingya refugees are now distributed throughout the world. The Southeast Asian nation of Malaysia has been a preferred destination for Rohingyas fleeing Myanmar’s state-sponsored genocide and more recently in a bid to change their fates from the refugee camps in Bangladesh. Refugees are one of the most vulnerable groups in Malaysia and often face dire circumstances, in which their health and wellbeing are compromised. Amidst a plethora of structural challenges, Rohingya refugees try to claim some of their rights with the aid of the UN card (UNHCR ID cards) in Malaysia. Guided by the culture-centered approach (CCA), this study examined the perspectives and experiences of healthcare among Rohingya refugees while living in Malaysia, now resettled in Aotearoa, New Zealand. The participants’ narratives showed that the UN card not only materialized their refugee status in Malaysia but also offered them a way of living in a world where documents anchor the materiality of health.
Journal Article
Interaction of yeast Rad51 and Rad52 relieves Rad52-mediated inhibition of de novo telomere addition
DNA double-strand breaks (DSBs) are toxic forms of DNA damage that must be repaired to maintain genome integrity. Telomerase can act upon a DSB to create a de novo telomere, a process that interferes with normal repair and creates terminal deletions. We previously identified sequences in Saccharomyces cerevisiae (SiRTAs; Sites of Repair-associated Telomere Addition) that undergo unusually high frequencies of de novo telomere addition, even when the original chromosome break is several kilobases distal to the eventual site of telomerase action. Association of the single-stranded telomere binding protein Cdc13 with a SiRTA is required to stimulate de novo telomere addition. Because extensive resection must occur prior to Cdc13 binding, we utilized these sites to monitor the effect of proteins involved in homologous recombination. We find that telomere addition is significantly reduced in the absence of the Rad51 recombinase, while loss of Rad52, required for Rad51 nucleoprotein filament formation, has no effect. Deletion of RAD52 suppresses the defect of the rad51Δ strain, suggesting that Rad52 inhibits de novo telomere addition in the absence of Rad51. The ability of Rad51 to counteract this effect of Rad52 does not require DNA binding by Rad51, but does require interaction between the two proteins, while the inhibitory effect of Rad52 depends on its interaction with Replication Protein A (RPA). Intriguingly, the genetic interactions we report between RAD51 and RAD52 are similar to those previously observed in the context of checkpoint adaptation. Forced recruitment of Cdc13 fully restores telomere addition in the absence of Rad51, suggesting that Rad52, through its interaction with RPA-coated single-stranded DNA, inhibits the ability of Cdc13 to bind and stimulate telomere addition. Loss of the Rad51-Rad52 interaction also stimulates a subset of Rad52-dependent microhomology-mediated repair (MHMR) events, consistent with the known ability of Rad51 to prevent single-strand annealing.
Journal Article