Europium-doped cerium oxide nanoparticles: investigating oxygen vacancies and their role in enhanced photocatalytic and magnetic properties.

In this study, pure and europium-doped (2%, 4%, 6%, and 8%) cerium oxide (CeO2) nanoparticles (NPs) were employed for efficient dye removal through photocatalytic approach. XRD and TEM confirmed the formation of pure CeO2 nanoparticles, while XPS and Raman spectroscopy were used to analyze the electronic properties and lattice defects, such as oxygen vacancies. The presence of lattice defects, which increased with the concentration of Eu, was found to be responsible for the enhanced degradation of Rose Bengal dye (82.4% for 8% Eu-doped sample) in 75 min. FTIR confirmed the chemical composition of the synthesized sample. The band at 617 cm-1, corresponding to the symmetrical stretching vibration mode of (Ce-O-Ce) or (Ce-O-Eu). The magnetic properties of synthesized samples were examined using VSM, revealing an increase from 4.48 to 11.0 emu/g in magnetization. This enhancement was attributed to F-center exchange mechanism (FCE), resulting from the presence of oxygen vacancies. These findings contribute to the development of advanced materials for sustainable wastewater treatment and spintronics.

Age and growth assessment of the near-threatened fish Rita rita (Siluriformes: Bagridae) in the Ganges basin

Introduction: Rita rita is a freshwater catfish under threat of extinction, mainly from loss of breeding and nursing grounds. A reliable method for age and growth estimation is needed by fishery managers. Objective: To identify the best body structure for age and growth estimation. Methods: We assessed estimates precision based on Average Percent Error (APE), Coefficient Variation (CV), and Percent Agreement (PA) between readers separately analyzed each calcified structure. We used 390 fish samples from three rivers, Ganga, Yamuna and Ramganga, from September 2018 to August 2019. Results: The three indicators favored the use of vertebrae for age estimation; the growth band seems to be annual and formed from May to September. The growth equations were Lt = 90.19(1-e-0.145(t+0.51)) for Ganga; Lt = 91.19 (1-e-0.14(t+0.59)) for Yamuna and Lt = 89.63 (1-e-0.15(t+0.68)) for Ramganga. Conclusion: This species reaches moderate growth in these rivers, where vertebrae are the recommended age estimation structure, followed, in case of need, by sectioned otoliths, whole otoliths and opercular bones. Pectoral spines should be avoided, especially in older fish.

Introducción: Rita rita es un pez de agua dulce bajo amenaza de extinción, principalmente por la pérdida de sitios de reproducción y crianza. Un método fiable para las estimaciones de edad y crecimiento es necesario para los administradores de recursos pesqueros. Objetivo: Identificar la mejor estructura corporal para estimaciones de edad y crecimiento. Métodos: Evaluamos la precisión de las estimaciones mediante el Porcentaje de Error Promedio (APE), Coeficiente de Variación (CV), y Porcentaje de Acuerdo (PA) entre lecturas para cada estructura calcificada. Usamos 390 muestras de peces de tres ríos, Ganga, Yamuna y Ramganga, de setiembre 2018 hasta agosto 2019. Resultados: Los tres indicadores favorecieron el uso de vértebras para la estimación de edad; la banda de crecimiento parece ser anual y se forma entre mayo y setiembre. Las ecuaciones de crecimiento fueron Lt = 90.19(1-e-0.145(t+0.51)) para Ganga; Lt = 91.19 (1-e-0.14(t+0.59)) para Yamuna y Lt = 89.63 (1-e-0.15(t+0.68)) para Ramganga. Conclusión: La especie alcanza un crecimiento moderado en estos ríos, dónde las vértebras son la estructura de estimación etaria recomendada, seguido de, en caso de ser necesario, los otolitos segmentados, otolitos enteros y huesos operculares. Debe evitarse el uso de espinas pectorales, especialmente en peces de mayor edad.

Interventions for Grieving and Bereaved Informal Caregivers: A Scoping Review of the Canadian Literature.

Background: The palliative approach to care is playing a larger role in the healthcare of older adults in Canada. Within (hospice) palliative care, informal caregivers play a crucial role as part of the interdisciplinary care team. Ensuring high quality palliative care includes providing effective grief and bereavement supports for them. Objective: This study aimed to identify current interventions addressing the grief and bereavement experiences of informal caregivers of geriatric patients in the Canadian (hospice) palliative/end-of-life care realm. Methods: A scoping review was undertaken using Arksey and O'Malley's framework. Seven electronic health and social science databases were searched. In addition, several stakeholder organizations' websites were reviewed to identify grey literature sources. Interventions that took place in Canada, were in English, and explored grief and bereavement supports for informal caregivers in an adult/geriatric (hospice) palliative care setting were included. After full text review, data were extracted and charted. Major themes were established following thematic content analysis. Results: Within a total of 18 sources, three themes were identified: (1) Classification of intervention, (2) Format of intervention, and (3) Intervention target. Method of delivery and type of intervention for grief and bereavement supports were aligned with the international literature. There is a need for large-scale evaluations of interventions and informal caregivers should be engaged in this process. Practitioners should be encouraged to direct bereavement interventions toward grieving caregivers, and to collaborate with them to improve access to these interventions. Policy makers should provide additional funding for grief interventions for informal caregivers. Conclusions: It is important to better understand the needs of informal caregivers experiencing grief and bereavement. Interdisciplinary collaborations will be necessary to develop, evaluate, and scale future interventions.

Nurse-led cardiovascular diseases risk assessment and communication using WHO/ISH risk prediction chart in a tertiary care hospital of North India.

Cardiovascular diseases (CVDs) contribute to most of the potentially preventable burden through early risk assessment. Nurse-led CVD risk assessment is an effective strategy to address the human resource crisis for CVD prevention. An interventional study was conducted in medicine wards of a tertiary care hospital in North India to train nurses in CVD risk assessment and its communication. All bedside nurses (n = 30) of selected wards were enrolled and trained in CVD risk assessment and communication using WHO/ISH risk prediction charts. Once fully trained, each nurse enrolled patients (>40 years of age) from their respective wards to assess and communicate CVD risk. To calculate the reliability of risk assessment, investigator simultaneously assessed CVD risk with nurses. The mean age of nurses was 32.07 ± 6.31 years. The results revealed that training significantly increased the knowledge of nursing personnel (P < 0.001). There was perfect inter-rater reliability agreement (Cohen's k = 0.929) between nurses and investigators while assessing CVD risk. Nurses demonstrated good communication skills. The study concluded that nurses can be trained successfully in CVD risk assessment and communication. The study recommends the task shifting of CVD risk assessment to nurses after providing proper training.

Support for Informal Caregivers in Canada: A Scoping Review from a Hospice and Palliative/End-of-Life Care Lens.

Objective: Informal caregivers (ICs) providing care for those at the end-of-life face physical, psycho-social, emotional, and/or financial challenges. However, there is a paucity of research towards the effectiveness of available interventions for this vulnerable population. The purpose of this scoping review was to investigate the availability and efficacy of interventions for ICs providing hospice and palliative/end-of-life care in Canada. Methods: Using Arksey and O'Malley's five step framework, a scoping review was conducted in the spring of 2020. Key electronic healthcare, social sciences, and grey literature databases were searched. Relevant publications from 2005 to 2019 were screened for inclusion criteria, and a thematic content analysis was conducted to summarize all key findings. Results: Initial searches yielded 145 results out of which 114 distinct articles were obtained. De-duplication and final screening yielded 28 sources which met inclusion criteria (22 peer-reviewed articles [78%] and 6 grey sources [22%]; 12 qualitative papers [42%]). Through thematic content analysis, four major themes were identified: [1] Direct financial support, [2] Direct psycho-sociospiritual support, [3] Indirect patient information provision/education, and [4] Indirect patient support. Conclusions: Healthcare practitioners should provide information on patient care and financial aid to ICs. Policies should aim to expand eligibility for and access to financial aid, in particular the Compassionate Care Benefits (CCB). Future research should focus on exploring other interventions, such as physical activities, to better support this vulnerable population. The results from this review will help inform and improve the well-being of ICs providing end-of-life care in Canada and beyond.

The Grief and Bereavement Experiences of Informal Caregivers: A Scoping Review of the North American Literature.

Background: Informal caregivers are a significant part of the hospice and palliative care landscape as members of the interdisciplinary care team. Despite this, little is known about the impact this responsibility has on informal caregivers' experiences of grief and bereavement. Objective: To address this, a scoping review of the literature was conducted to explore the current state of knowledge toward grief and bereavement of informal caregivers of adult/geriatric patients in the hospice and palliative/end-of-life care realm within North America. Methods: Using Arksey and O'Malley's 5-step framework, key electronic health care and social sciences databases (eg, CINAHL, MEDLINE, ProQuest Sociological Abstracts, PsycINFO) alongside gray literature sources were searched and screened against inclusion and exclusion criteria. A thematic content analysis was used to identify key themes. Results: 29 articles met the final inclusion criteria with 3 central themes emerging: (1) mediators of grief, (2) grief experiences, and (3) types of grief. Discussion: Informal caregivers encounter unique grief and bereavement experiences: The range of psychosocial outcomes, both negative and positive, can be affected by various mediators such as caregiver burden, demographics, disease type of the patient being cared for, etc. Bereavement interventions must be designed with the mediators of grief in mind. Conclusions: Understanding the nuances of informal caregivers' experiences with grief and bereavement will inform and advance practice, policy, and research. Practitioners/clinicians should be further educated on how to properly acknowledge the complexity of grief and bereavement for informal caregivers, specifically paying attention to mediators. Further research needs to consider the role of culture.

Informal Caregiving for People With Life-Limiting Illness: Exploring the Knowledge Gaps.

Background: People with life-limiting illness are increasingly having more care provided to them by informal caregivers (ICs) such as family members and friends. Although there is a substantial amount of literature surrounding informal caregiving, there is a paucity of research from a hospice palliative care angle. To address this knowledge gap, this scoping review explored the effects of/challenges to informal caregiving at the end of life in Canada. Methods: Scoping review of the literature following Arksey and O'Malley's framework. Key healthcare and social sciences databases alongside the gray literature were searched. Relevant scholarly and gray literature sources from 2005 to 2019 were screened for inclusion criteria, and a thematic content analysis employed to summarize findings. Results: Of 2,717 initial search results, 257 distinct full text articles were obtained. Following deduplication and screening, 33 met inclusion criteria. Four major themes were identified: (1) Physical health challenges, (2) Psycho-socio-spiritual health challenges, (3) Financial issues, and (4) Health system issues. Gender of ICs was also found to be an important contributor to the differing effects of providing support. Conclusions: This review raises awareness toward ICs regarding the numerous physical, psycho-socio-spiritual, financial, and health system challenges faced during care for people with life-limiting illness. The knowledge gained will inform and advance future practice, policy, and research. Application to interventions (such as caregiver benefits) will assist to improve informal caregiving experiences and outcomes alongside quality of life. Further research is required to understand these unique experiences and the challenges of minority IC populations.

COVID-19 Testing and Diagnostics: A Review of Commercialized Technologies for Cost, Convenience and Quality of Tests.

Population-scale and rapid testing for SARS-CoV-2 continues to be a priority for several parts of the world. We revisit the in vitro technology platforms for COVID-19 testing and diagnostics-molecular tests and rapid antigen tests, serology or antibody tests, and tests for the management of COVID-19 patients. Within each category of tests, we review the commercialized testing platforms, their analyzing systems, specimen collection protocols, testing methodologies, supply chain logistics, and related attributes. Our discussion is essentially focused on test products that have been granted emergency use authorization by the FDA to detect and diagnose COVID-19 infections. Different strategies for scaled-up and faster screening are covered here, such as pooled testing, screening programs, and surveillance testing. The near-term challenges lie in detecting subtle infectivity profiles, mapping the transmission dynamics of new variants, lowering the cost for testing, training a large healthcare workforce, and providing test kits for the masses. Through this review, we try to understand the feasibility of universal access to COVID-19 testing and diagnostics in the near future while being cognizant of the implicit tradeoffs during the development and distribution cycles of new testing platforms.

Scan4CFU: Low-cost, open-source bacterial colony tracking over large areas and extended incubation times.

A hallmark of bacterial populations cultured in vitro is their homogeneity of growth, where the majority of cells display identical growth rate, cell size and content. Recent insights, however, have revealed that even cells growing in exponential growth phase can be heterogeneous with respect to variables typically used to measure cell growth. Bacterial heterogeneity has important implications for how bacteria respond to environmental stresses, such as antibiotics. The phenomenon of antimicrobial persistence, for example, has been linked to a small subpopulation of cells that have entered into a state of dormancy where antibiotics are no longer effective. While methods have been developed for identifying individual non-growing cells in bacterial cultures, there has been less attention paid to how these cells may influence growth in colonies on a solid surface. In response, we have developed a low-cost, open-source platform to perform automated image capture and image analysis of bacterial colony growth on multiple nutrient agar plates simultaneously. The descriptions of the hardware and software are included, along with details about the temperature-controlled growth chamber, high-resolution scanner, and graphical interface to extract and plot the colony lag time and growth kinetics. Experiments were conducted using a wild type strain of Escherichia coli K12 to demonstrate the feasibility and operation of our setup. By automated tracking of bacterial growth kinetics in colonies, the system holds the potential to reveal new insights into understanding the impact of microbial heterogeneity on antibiotic resistance and persistence.