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"JOHNSTON, E. L"
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Acquired tastes : why families eat the way they do
\"Magazine articles, news items, and self-improvement books tell us that our daily food choices -- whether we opt for steak or vegetarian, takeout or homemade, a TV dinner or a sit-down meal -- serve as bold statements about who we are as individuals. Acquired Tastes makes the case that our food habits say more about where we come from and who we would like to be. Eating preferences and habits never solely reflect personal tastes. Drawing on interviews with parents and teens from over one hundred families in urban and rural Canada, Brenda Beagan, Gwen Chapman, and colleagues show that age, gender, social class, ethnicity, health concerns, food availability, and political and moral concerns shape the meanings that families attach to food and their self-identities. They also influence how its members respond to social discourses on health, beauty, and the environment. The intimate portraits of family eating habits that grace this book challenge existing beliefs about who determines what families eat (teens or adults), the role of cosmopolitanism in high- and low-income households, and the role that fat anxiety plays among teenage boys and girls. By doing so, they cast doubt on the fundamental assumptions that underlie many public health campaigns.\" --Provided by publisher.
Book
Gender and cultural bias in student evaluations: Why representation matters
Gendered and racial inequalities persist in even the most progressive of workplaces. There is increasing evidence to suggest that all aspects of employment, from hiring to performance evaluation to promotion, are affected by gender and cultural background. In higher education, bias in performance evaluation has been posited as one of the reasons why few women make it to the upper echelons of the academic hierarchy. With unprecedented access to institution-wide student survey data from a large public university in Australia, we investigated the role of conscious or unconscious bias in terms of gender and cultural background. We found potential bias against women and teachers with non-English speaking backgrounds. Our findings suggest that bias may decrease with better representation of minority groups in the university workforce. Our findings have implications for society beyond the academy, as over 40% of the Australian population now go to university, and graduates may carry these biases with them into the workforce.
Journal Article
Functional and structural responses to marine urbanisation
Urban areas have broad ecological footprints with complex impacts on natural systems. In coastal areas, growing populations are advancing their urban footprint into the ocean through the construction of seawalls and other built infrastructure. While we have some understanding of how urbanisation might drive functional change in terrestrial ecosystems, coastal systems have been largely overlooked. This study is one of the first to directly assess how changes in diversity relate to changes in ecosystem properties and functions (e.g. productivity, filtration rates) of artificial and natural habitats in one of the largest urbanised estuaries in the world, Sydney Harbour. We complemented our surveys with an extensive literature search. We found large and important differences in the community structure and function between artificial and natural coastal habitats. However, differences in diversity and abundance of organisms do not necessarily match observed functional changes. The abundance and composition of important functional groups differed among habitats with rocky shores having 40% and 70% more grazers than seawalls or pilings, respectively. In contrast, scavengers were approximately 8 times more abundant on seawalls than on pilings or rocky shores and algae were more diverse on natural rocky shores and seawalls than on pilings. Our results confirm previous findings in the literature. Oysters were more abundant on pilings than on rocky shores, but were also smaller. Interestingly, these differences in oyster populations did not affect in situ filtration rates between habitats. Seawalls were the most invaded habitats while pilings supported greater secondary productivity than other habitats. This study highlights the complexity of the diversity-function relationship and responses to ocean sprawl in coastal systems. Importantly, we showed that functional properties should be considered independently from structural change if we are to design and manage artificial habitats in ways to maximise the services provided by urban coastal systems and minimise their ecological impacts.
Journal Article
Major Conservation Policy Issues for Biodiversity in Oceania
Oceania is a diverse region encompassing Australia, Melanesia, Micronesia, New Zealand, and Polynesia, and it contains six of the world's 39 hotspots of diversity. It has a poor record for extinctions, particularly for birds on islands and mammals. Major causes include habitat loss and degradation, invasive species, and overexploitation. We identified six major threatening processes (habitat loss and degradation, invasive species, climate change, overexploitation, pollution, and disease) based on a comprehensive review of the literature and for each developed a set of conservation policies. Many policies reflect the urgent need to deal with the effects of burgeoning human populations (expected to increase significantly in the region) on biodiversity. There is considerable difference in resources for conservation, including people and available scientific information, which are heavily biased toward more developed countries in Oceania. Most scientific publications analyzed for four threats (habitat loss, invasive species, overexploitation, and pollution) are from developed countries: 88.6% of Web of Science publications were from Australia (53.7%), New Zealand (24.3%), and Hawaiian Islands (10.5%). Many island states have limited resources or expertise. Even countries that do (e.g., Australia, New Zealand) have ongoing and emerging significant challenges, particularly with the interactive effects of climate change. Oceania will require the implementation of effective policies for conservation if the region's poor record on extinctions is not to continue.
Journal Article
Field assessment of effects of timing and frequency of copper pulses on settlement of sessile marine invertebrates
CuSO4-treated plaster blocks were used to create localised concentrations of copper significantly above ambient levels. Between October 1996 and March 1997 we used this system to manipulate the timing and frequency of transient copper-pollution events close to settlement plates.
Journal Article
A novel real-world ecotoxicological dataset of pelagic microbial community responses to wastewater
Real-world observational datasets that record and quantify pressure-stressor-response linkages between effluent discharges and natural aquatic systems are rare. With global wastewater volumes increasing at unprecedented rates, it is urgent that the present dataset is available to provide the necessary information about microbial community structure and functioning. Field studies were performed at two time-points in the Austral summer. Single-species and microbial community whole effluent toxicity (WET) testing was performed at a complete range of effluent concentrations and two salinities, with accompanying environmental data to provide new insights into nutrient and organic matter cycling, and to identify ecotoxicological tipping points. The two salinity regimes were chosen to investigate future scenarios based on a predicted salinity increase at the study site, typical of coastal regions with rising sea levels globally. Flow cytometry, amplicon sequencing of 16S and 18S rRNA genes and micro-fluidic quantitative polymerase-chain reactions (MFQPCR) were used to determine chlorophyll-a and total bacterial cell numbers and size, as well as taxonomic and functional diversity of pelagic microbial communities. This strong pilot dataset could be replicated in other regions globally and would be of high value to scientists and engineers to support the next advances in microbial ecotoxicology, environmental biomonitoring and estuarine water quality modelling.
Measurement(s)
water composition • total dissolved solids • conductivity of water • pH • concentration of oxygen in water • Total Organic Carbon • dinitrogen • phosphorus atom • ammonia • nitrate • nitrite • biological oxygen demand • chlorophyll a • Cell Density • Algae • Bacteria • hydrogen sulfide • Toxicity • rRNA_16S • rRNA_18S • abundance of nutrient cycling genes • abundance of antibiotic resistance genes
Technology Type(s)
water quality unit • water testing suite • dilution method • autofluorescence • flow cytometry method • whole effluent toxicity testing • DNA sequencing • microfluidic quantitative polymerase chain reaction
Factor Type(s)
effluent concentration • salinity levels
Sample Characteristic - Organism
Bacteria • algae
Sample Characteristic - Environment
waste water • estuary • sea coast • saline water • fresh water body
Sample Characteristic - Location
Hunter River
Machine-accessible metadata file describing the reported data:
https://doi.org/10.6084/m9.figshare.12221738
Journal Article
Utilisation of anti-TNF levels in a UK tertiary IBD centre
ObjectiveTo ascertain how anti-tumour necrosis factor (TNF) drug and anti-drug antibody levels testing is used in a ‘real-world’ setting to optimise inflammatory bowel disease (IBD) treatment.DesignRetrospective cohort study of prospectively collected patient data.SettingTertiary IBD centre in London, UK.PatientsAll patients at Guy's and St Thomas' Hospitals on anti-TNF who had levels measured between the start of testing in 2012 and October 2014.InterventionsAnti-TNF drug and anti-drug antibody levels as part of routine monitoring.Main outcome measuresIndication for measuring levels and changes in management made as a result of the levels.Results330 infliximab levels were carried out in 199 patients and 143 adalimumab levels were carried out in 103 patients. Levels were primarily done in those with evidence of loss of response; 37% of infliximab levels and 52% of adalimumab levels. Levels resulted in a change in management in 26% of patients in infliximab group and 25% of patients in adalimumab group; however, this was greater in those with loss of response, 62% and 61% respectively. Anti-drug antibodies were detected in 7% of patients.ConclusionsOur early experience has demonstrated that measuring anti-TNF drug and anti-drug antibody levels can be useful in the optimisation of IBD management. In an increasing number of patients, particularly those with evidence of loss of response, it allows early decisions to be made regarding changing therapy. It also offers the potential for significant cost-saving by preventing pointless dose escalation in the context of therapeutic levels or when high-level anti-drug antibodies are present.
Journal Article
Formation of Polychlorinated Dibenzofurans and Dioxins during Combustion, Electrical Equipment Fires and PCB Incineration
Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are likely formed by thermal synthesis of a variety of primary precursors. Highest levels of these compounds are expected, however, when the starting material requires only one or two reaction steps for their formation, as is the case with chlorophenols, chlorobenzenes and polychlorinated biphenyls (PCBs). Laboratory pyrolyses have indeed shown that PCBs give significant yields of PCDFs, and chlorobenzenes give both PCDFs and PCDDs. In addition, a variety of other chloroaromatic compounds are formed. From these experiments and from accidents involving PCB fires, it is known that PCDFs are the most important toxic compounds associated with PCBs. Most commercial PCBs contain PCDFs in the low ppm range. PCDF concentration does not increase during normal operation in electrical equipment. Accidents (fires and explosions) involving PCBs can give PCDF levels in soot of up to 1000 ppm and higher. Effective thermal destruction of PCB is possible in modern incineration units, provided high temperatures, excess air and sufficient residence times are used. Exact figures for minimum temperature and residence time cannot be given, since feedstock and incinerator construction greatly influence destruction efficiency. Effluents from EPA-licensed incinerators used for PCB destruction contain only very low levels of PCDDs and PCDFs.
Journal Article
Efficacy and safety of abemaciclib alone and with PI3K/mTOR inhibitor LY3023414 or galunisertib versus chemotherapy in previously treated metastatic pancreatic adenocarcinoma: A randomized controlled trial
Background Pancreatic ductal adenocarcinomas (PDAC) are characterized by frequent cell cycle pathways aberrations. This study evaluated safety and efficacy of abemaciclib, a cyclin‐dependent kinase 4 and 6 inhibitor, as monotherapy or in combination with PI3K/mTOR dual inhibitor LY3023414 or TGFβ inhibitor galunisertib versus standard of care (SOC) chemotherapy in patients with pretreated metastatic PDAC. Methods This Phase 2 open‐label study enrolled patients with metastatic PDAC who progressed after 1–2 prior therapies. Patients were enrolled in a safety lead‐in (abemaciclib plus galunisertib) followed by a 2‐stage randomized design. Stage 1 randomization was planned 1:1:1:1 for abemaciclib, abemaciclib plus LY3023414, abemaciclib plus galunisertib, or SOC gemcitabine or capecitabine. Advancing to Stage 2 required a disease control rate (DCR) difference ≥0 in abemaciclib‐containing arms versus SOC. Primary objectives for Stages 1 and 2 were DCR and progression‐free survival (PFS), respectively. Secondary objectives included response rate, overall survival, safety, and pharmacokinetics. Results One hundred and six patients were enrolled. Abemaciclib plus galunisertib did not advance to Stage 1 for reasons unrelated to safety or efficacy. Stage 1 DCR was 15.2% with abemaciclib monotherapy, 12.1% with abemaciclib plus LY3023414, and 36.4% with SOC. Median PFS was 1.7 months (95% CI: 1.4–1.8), 1.8 months (95% CI: 1.3–1.9), and 3.3 months (95% CI: 1.1–5.7), respectively. No arms advanced to Stage 2. No new safety signals were identified. Conclusion In patients with pretreated metastatic PDAC, abemaciclib‐based therapy did not improve DCRs or PFS compared with SOC chemotherapy. No treatment arms advanced to Stage 2. Abemaciclib remains investigational in patients with PDAC. Pancreatic ductal adenocarcinomas (PDAC) are characterized by frequent cell cycle pathways aberrations. This phase 2 randomized study for refractory metastatic PDAC patients showed that the CDK4/6 inhibitor abemaciclib, alone or in combination with the PI3K/mTOR LY3023414, does not improve disease control or progression‐free survival compared to standard chemotherapy.
Journal Article