Publications by authors named "Darlington A"

Dry deposition is an important yet poorly constrained process that removes reactive organic carbon from the atmosphere, making it unavailable for airborne chemical reactions and transferring it to other environmental systems. Using an aircraft-based measurement method, we provide large-scale estimates of total gas-phase organic carbon deposition rates and fluxes. Observed deposition rates downwind of large-scale unconventional oil operations reached up to 100 tC hour, with fluxes exceeding 0.

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Bacteria can be engineered to manufacture chemicals, but it is unclear how to optimally engineer a single cell to maximise production performance from batch cultures. Moreover, the performance of engineered production pathways is affected by competition for the host's native resources. Here, using a 'host-aware' computational framework which captures competition for both metabolic and gene expression resources, we uncover design principles for engineering the expression of host and production enzymes at the cell level which maximise volumetric productivity and yield from batch cultures.

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Background: A cancer diagnosis early in life can leave a legacy in terms of compromised Quality of Life (QoL). There is a lack of clarity regarding the impact on QoL according to age at diagnosis, with childhood cancer survivors (CCS) and adolescents and young adult cancer survivors (AYACS) often combined. As part of an EORTC Quality of Life Group study, this umbrella review aims to (1) identify the QoL outcomes reported in the literature for both CCS and AYACS, and (2) investigate the similarities and differences in QoL challenges between both groups.

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Purpose: Survivors of childhood cancer can suffer from long-term sequelae or decline in quality of life (QoL), for which careful and standardized selection of outcome measures become more important. This study aims to assess different QoL-related outcomes using three distinct questionnaires in an international study, identify the priorities of childhood ALL survivors via the administered questionnaires, and investigate potential interrelationships among QoL domains across the questionnaires.

Methods: Childhood ALL survivors treated according to the EORTC CLG treatment protocols 58741, 58831/2, and 58881 were recruited in Belgium and France and answered self-report QoL questionnaires, including the Short-Form Health Survey 12 (SF12), the Quality-of-Life Systemic Inventory (QLSI), and the Impact of Cancer for Childhood Cancer Survivors (IOC-CS).

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Access to timely, age-appropriate palliative care services and end-of-life communication are two standards of care for adolescents and young adults (AYAs) living with cancer where cure is uncertain or unlikely. Health professionals' capacity to facilitate these standards is critical. This study aimed to understand AYA oncology health professionals' experienced practices in, and barriers to, delivering these standards of care across palliative care and end-of-life communication in Australia, New Zealand, and the United Kingdom (UK).

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Article Synopsis
  • Pseudomonas putida is modified to create a non-motile strain (ΔfleQ) by deleting the FleQ gene, which controls flagellar synthesis.
  • The ΔfleQ strain shows improved resource allocation, resulting in less biofilm formation and better expression of a heterologous gene in nutrient-rich conditions compared to the wild-type.
  • Enhanced tolerance to chloramphenicol and consistent growth rates in minimal media indicate that removing FleQ allows for flexible gene expression and resource management, which can benefit industrial processes.
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  • A study analyzed 1,498 patients with cardiogenic shock (CS) from a cardiovascular intensive care unit over 11 years, focusing on sex-based differences in care and outcomes.
  • The findings showed that while there were no significant differences in overall mortality rates between males and females, women were less likely to receive temporary mechanical circulatory support compared to men, particularly in cases without acute myocardial infarction.
  • Importantly, females who underwent percutaneous intervention had lower 1-year mortality rates, suggesting that the underutilization of this treatment in women may be detrimental to their outcomes.
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Background: Many studies highlight poor health-related quality of life (HRQoL) in children treated for brain tumours and their parents. However, little is known about the extent to which their informational, healthcare and communication needs regarding HRQoL are met during medical outpatient consultations.

Aim: To explore the experiences of families regarding communication with physicians about HRQoL issues during consultations after treatment for childhood brain tumours.

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Background: Patient and public involvement (PPI) in research is widely acknowledged as essential to achieving successful and impactful research. Despite this acknowledgement, there are limited reports on how to approach and apply meaningful PPI throughout the research cycle and how to address challenges for researchers such as doctoral students, particularly when undertaking research on sensitive topics. This paper provides insights and examples for researchers new to PPI, on the impact of active PPI and recommendations for building and developing a PPI group in a paediatric focused doctoral research study with bereaved parents and carers.

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Cold heavy oil production with sand (CHOPS) is an extraction process for heavy oil in Canada, with the potential to lead to higher CH venting than conventional oil sites, that have not been adequately characterized. In order to quantify CH emissions from CHOPS activities, a focused aerial measurement campaign was conducted in the Canadian provinces of Alberta and Saskatchewan in June 2018. Total CH emissions from each of 10 clusters of CHOPS wells (containing 22-167 well sites per cluster) were derived using a mass balance computation algorithm that uses in situ wind data measurement on board aircraft.

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Background: The EORTC QLQ-STO22 (QLQ-STO22) is a firmly established and validated measure of health-related quality of life (HRQoL) for people with gastric cancer (GC), developed over two decades ago. Since then there have been dramatic changes in treatment options for GC. Also, East Asian patients were not involved in the development of QLQ-STO22, where GC is most prevalent and the QLQ-STO22 is widely used.

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Engineered microbial consortia often have enhanced system performance and robustness compared with single-strain biomanufacturing production platforms. However, few tools are available for generating co-cultures of the model and key industrial host Saccharomyces cerevisiae. Here we engineer auxotrophic and overexpression yeast strains that can be used to create co-cultures through exchange of essential metabolites.

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Anthropogenic organic carbon emissions reporting has been largely limited to subsets of chemically speciated volatile organic compounds. However, new aircraft-based measurements revealed total gas-phase organic carbon emissions that exceed oil sands industry-reported values by 1900% to over 6300%, the bulk of which was due to unaccounted-for intermediate-volatility and semivolatile organic compounds. Measured facility-wide emissions represented approximately 1% of extracted petroleum, resulting in total organic carbon emissions equivalent to that from all other sources across Canada combined.

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Background: Adolescents and young adults (AYAs) with cancer, defined as individuals aged 15-39 years at initial cancer diagnosis, form a unique population; they face age-specific issues as they transition to adulthood. This paper presents the protocol for the development of a core outcome set (COS) for AYAs with cancer.

Methods: The methodological standards from the Core Outcome Measures in Effectiveness Trials (COMET) and the International Consortium for Health Outcomes Measurement (ICHOM) for COS development will guide the development of the COS for AYAs with cancer.

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Good communication is central to good healthcare. As a result of poor communication between parents and healthcare professionals (HCPs) in clinical settings, this study aimed to address this problem by developing a communication tool to empower parents and act as a prompt for HCPs to talk about the child's care and gather information at the point of admission to hospital about what is important to families, therefore supporting patient-centered communication. A design thinking process was used to develop a physical copy of Chloe's card and evaluate its use.

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Purpose: Little is known about the impact of COVID-19 on children and young people (CYP) with hydrocephalus and their families. This study explored the experiences and support needs of CYP with hydrocephalus and parents who have a child with hydrocephalus during the COVID-19 pandemic.

Methods: CYP with hydrocephalus and parents of CYP with hydrocephalus in the United Kingdom completed an online survey with open and closed questions exploring experiences, information, support needs and decision making processes.

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The purpose of this research was to understand the experience of parenting a child receiving dexamethasone during maintenance chemotherapy for acute lymphoblastic leukemia (ALL). Previous research has shown that dexamethasone's high level of toxicity causes many physical, behavioral, and emotional side effects, which reduce the quality of life during ALL treatment. Less is known about the experience of parenting a child receiving dexamethasone and the impact on the parent-child relationship.

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Measurement-based estimates of greenhouse gas (GHG) emissions from complex industrial operations are challenging to obtain, but serve as an important, independent check on inventory-reported emissions. Such top-down estimates, while important for oil and gas (O&G) emissions globally, are particularly relevant for Canadian oil sands (OS) operations, which represent the largest O&G contributor to national GHG emissions. We present a multifaceted top-down approach for estimating CO emissions that combines aircraft-measured CO/NO emission ratios (ERs) with inventory and satellite-derived NO emissions from Ozone Monitoring Instrument (OMI) and TROPOspheric Ozone Monitoring Instrument (TROPOMI) and apply it to the Athabasca Oil Sands Region (AOSR) in Alberta, Canada.

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The use of item libraries for patient-reported outcome (PRO) measurement in oncology allows for the customisation of PRO assessment to measure key health-related quality of life concepts of relevance to the target population and intervention. However, no high-level recommendations exist to guide users on the design and implementation of these customised PRO measures (item lists) across different PRO measurement systems. To address this issue, a working group was set up, including international stakeholders (academic, independent, industry, health technology assessment, regulatory, and patient advocacy), with the goal of creating recommendations for the use of item libraries in oncology trials.

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In addition to optimising survival of children with rhabdomyosarcoma (RMS), more attention is now focused on improving their quality of life (QOL) and reducing symptoms during treatment, palliative care or into long-term survivorship. QOL and ongoing symptoms related to the disease and its treatment are outcomes that should ideally be patient-reported (patient-reported outcomes, PROs) and can be assessed using patient-reported outcome measures (PROMS). This commentary aims to encourage PRO and PROM use in RMS by informing professionals in the field of available PROMs for utilisation in paediatric RMS and provide considerations for future use in research and clinical practice.

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Background: With increasing survival rates in pediatric oncology, the need to monitor health-related quality of life (HRQOL) is becoming even more important. However, available patient-reported outcome measures (PROMs) have been criticized. This review aims to systematically evaluate the content validity of PROMs for HRQOL in children with cancer.

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Objective: To explore the experiences, information and support needs of parents/caregivers of children with cancer and how these changed as the COVID-19 pandemic evolved.

Design: Online surveys containing closed and free-text questions on experiences, information and support needs were completed at four time points (between April 2020 and October 2021) during the COVID-19 pandemic. Descriptive statistics of closed items and content analysis of qualitative data were conducted.

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Article Synopsis
  • The study aims to investigate cognitive toxicity in patients with advanced cancer participating in phase I clinical trials of new therapies, highlighting that subjective side effects, particularly cognitive changes, are often underreported.
  • It employs a mixed-methods approach, using both quantitative cognitive assessments and qualitative semi-structured interviews at multiple time points post-treatment to capture the patient experience comprehensively.
  • The research has received ethical approval and seeks to bring attention to unmet needs in patient care, potentially improving awareness and support for cognitive side effects during novel cancer therapies.
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