RESUMO
The development of a skilled research workforce in aging is fundamental to understanding conditions associated with growing older and extending healthy, active years of life. The National Institutes of Health (NIH) supports the training of health scientists, and its National Institute on Aging (NIA) prioritizes the professional development of investigators with an interest in aging. Since 1987, NIA's Summer Institute on Aging Research, renamed the Butler-Williams (B-W) Scholars Program in 2013, has offered an intensive one-week experience on issues, opportunities, and challenges of research on aging, with emphasis on disparities and health equity. The first 30 years of the Program are described in this report, including its history, selected curriculum highlights, Scholar outcomes, and qualitative data from faculty, and the program's impact on the training, growth, and development of scientists in aging research. Questions raised over a decade ago by the Committee on the Future Health Care Workforce for Older Americans Board on Health Care Services are revisited, and recommendations for the future are provided. This important Program remains an exemplar for the training and development of health scientists for careers that advance biomedical research and emphasize an equitable understanding of factors related to extending healthy years of life.
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Pesquisa Biomédica , Geriatria , Humanos , Estados Unidos , Idoso , National Institute on Aging (U.S.) , Geriatria/educação , Envelhecimento , CurrículoRESUMO
The pandemics of COVID-19 and systemic racism highlighted health inequities that have existed for decades among Black communities. Nurses are positioned to address these health inequities through innovative ideas and research. More specifically, Black nurses, because of their shared lived experience, understand sociostructural factors underpinning health inequities and how to best engage with Black communities. However, only 8% of Black nurses make up the overall nursing workforce and far fewer are nurse scientists. Historically Black Colleges and Universities (HBCUs) can offer critically important options for success in addressing the dearth of Black nurse scientists working across sectors and contributing to rich academic milieu, informing innovative national policy, and creating impactful practice. We discuss challenges and strategies to promoting research careers at HBCUs to attract Black nurse scientists as the next leaders in health inequities research.
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Negro ou Afro-Americano , Educação em Enfermagem , Pessoal de Laboratório/provisão & distribuição , Liderança , Enfermeiras e Enfermeiros/provisão & distribuição , Universidades , Pesquisa Biomédica , COVID-19 , Humanos , RacismoRESUMO
OBJECTIVE: To explore the experiences of women in Scotland who accessed medical abortion at home up to 12 weeks' gestation, delivered via a telemedicine abortion service implemented in response to the coronavirus (COVID-19) pandemic, to identify areas for improvement and inform service provision. DESIGN: Qualitative interview study. SETTING: Abortion service in one National Health Service health board in Scotland. POPULATION OR SAMPLE: Twenty women who accessed telemedicine abortion services and self-administered mifepristone and misoprostol at home up to 12 weeks' gestation. METHODS: Thematic analysis of semi-structured qualitative interviews, informed by the Framework analytic approach. MAIN OUTCOME MEASURES: Women's experiences of accessing telemedicine for medical abortion at home, specifically: acceptability of the telephone consultation and remote support; views on no pre-abortion ultrasound scan; and self-administration of abortion medications at home. RESULTS: Novel study findings were three-fold: (1) participants valued the option of accessing abortion care via telemedicine and emphasised the benefits of providing a choice of telephone and in-person consultation to suit those with different life circumstances; (2) the quality of abortion care was enhanced by the telemedicine service in relation to access, comfort and flexibility, and ongoing telephone support; (3) participants described being comfortable with, and in some cases a preference for, not having an ultrasound scan. CONCLUSIONS: This research demonstrates support for the continuation of telemedicine abortion services beyond the temporary arrangements in place during COVID-19, and lends weight to the argument that offering the option of telemedicine abortion care can enable women to access this essential health service. TWEETABLE ABSTRACT: #Telemedicine provision of medical #abortion at home up to 12 weeks' gestation is acceptable and highly valued by #women #Research #SRHR @nbw80 @doctorjjrw @jeniharden @cameronsharon @mrc_crh @edinuniusher.
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Abortivos não Esteroides/administração & dosagem , Aborto Induzido/métodos , Satisfação do Paciente , Autoadministração/psicologia , Telemedicina/métodos , Aborto Induzido/psicologia , Adulto , COVID-19 , Feminino , Acessibilidade aos Serviços de Saúde , Humanos , Mifepristona/administração & dosagem , Misoprostol/administração & dosagem , Gravidez , Pesquisa Qualitativa , SARS-CoV-2 , Escócia , Medicina EstatalRESUMO
Large quantities of organic carbon are stored in frozen soils (permafrost) within Arctic and sub-Arctic regions. A warming climate can induce environmental changes that accelerate the microbial breakdown of organic carbon and the release of the greenhouse gases carbon dioxide and methane. This feedback can accelerate climate change, but the magnitude and timing of greenhouse gas emission from these regions and their impact on climate change remain uncertain. Here we find that current evidence suggests a gradual and prolonged release of greenhouse gas emissions in a warming climate and present a research strategy with which to target poorly understood aspects of permafrost carbon dynamics.
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Ciclo do Carbono , Mudança Climática , Pergelissolo/química , Regiões Árticas , Dióxido de Carbono/análise , Retroalimentação , Congelamento , Metano/análise , Água do Mar/química , IncertezaRESUMO
This article chronicles the John A. Hartford Foundation (JAHF) funded gerontological nursing initiatives 1996-present. These initiatives, in particular BAGNC, were designed to impact the health of older adults through building gerontological nursing capacity by preparing new and retooling current faculty with expert gerontological nursing competencies, preparing new researchers, developing a knowledgeable nurse workforce with competency in gerontological nursing and prepare leaders in academics and health care systems. A description of major programs funded by the Foundation is presented and the impact, adaptation, and change in gerontological nursing resulting from over $86 million in funding awarded to these efforts is examined and intended to inform our way forward. NHCGNE, Legacy Affiliates and partners named in this article continue to innovate and transform healthcare systems as a way forward.
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Competência Clínica/normas , Docentes de Enfermagem/educação , Fundações/economia , Enfermagem Geriátrica/organização & administração , Liderança , Inovação Organizacional , Idoso , Educação de Pós-Graduação em Enfermagem , Humanos , Pesquisa em EnfermagemRESUMO
BACKGROUND: The National Hartford Center of Gerontological Nursing Excellence (NHCGNE) Scholars/Fellows Award Program was designed to promote the growth and development of nurse scientists, educators, and leaders in aging. PURPOSE: McBride's conceptual framework of the growth and development of nurse leaders was used to examine the NHCGNE impact on health and aging policy work among scholars/fellows, including barriers, facilitators, and resources. METHODS: A multimethod two-phased approach included an online survey (phase I) focused on research and policy impact at local, state, or national level. Telephone interviews (phase II) were conducted to further understand the nature, depth, and focus of respondents' policy work. DISCUSSION: Based on our findings, we propose multilevel recommendations for advancing nurse scientists' capacity to be leaders in shaping policy. Keen research skills are influential in policy advancement but not sufficient to advance policy. Preparing nurse scientists with competencies in translating research into policy can ultimately transform health and health care for older adults.
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Enfermagem Geriátrica , Política de Saúde , Liderança , Papel do Profissional de Enfermagem , Pesquisa em Enfermagem , Humanos , Disseminação de Informação , Entrevistas como Assunto , Mentores , Avaliação de Programas e Projetos de Saúde , Rede Social , Inquéritos e Questionários , Estados UnidosRESUMO
AIMS: To explore the everyday experiences of children (aged ≤ 12 years) with Type 1 diabetes to identify factors that help or hinder diabetes self-management practices. METHODS: Eight databases (Embase, Medline, CINAHL, Web of Science, PsychInfo, ASSIA, ERIC and ProQuest Dissertations) were searched in 2016 to identify qualitative studies exploring children's views about self-managing diabetes. Data were extracted, coded and analysed using thematic synthesis. RESULTS: Eighteen studies from five countries were included in the review. Synthesis of studies' findings resulted in the identification of three overarching analytical themes. The first theme, 'Understandings of diabetes and involvement in self-management', outlines ways in which children understand diabetes and develop self-management responsibilities. The second theme, 'Disruption to life and getting on with it', reports children's frustrations at disruptions to everyday life when managing diabetes, and how attempts to appear normal to family and friends affect self-management practices. The third theme, 'Friends' support', describes how friends' reactions and responses to diabetes affect children's ability to appear normal and willingness to disclose information about diabetes, and support provided by 'informed friends', or peers with diabetes. CONCLUSIONS: Although the synthesis has identified how children's everyday life experiences inform ways in which they undertake diabetes self-management, it was not possible to determine new ways to provide support. To help children optimise their glycaemic control, further work should be undertaken to identify their need for support and which takes into account the potential ways in which parents, friends and peers can offer assistance.
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Atividades Cotidianas , Diabetes Mellitus Tipo 1/terapia , Conhecimentos, Atitudes e Prática em Saúde , Hiperglicemia/prevenção & controle , Hipoglicemia/prevenção & controle , Relações Interpessoais , Autogestão , Criança , Pré-Escolar , Terapia Combinada/efeitos adversos , Efeitos Psicossociais da Doença , Diabetes Mellitus Tipo 1/sangue , Relações Familiares , Amigos , Humanos , Grupo Associado , Sistemas de Apoio Psicossocial , Pesquisa QualitativaRESUMO
OBJECTIVE: To explore the experiences of women in Scotland who return home to complete medical termination of pregnancy (TOP) ≤63 days of gestation, after being administered with mifepristone and misoprostol at an NHS TOP clinic. DESIGN: Qualitative interview study. SETTING: One National Health Service health board (administrative) area in Scotland. POPULATION OR SAMPLE: Women in Scotland who had undergone medical TOP ≤63 days, and self-managed passing the pregnancy at home; recruited from three clinics in one NHS health board area between January and July 2014. METHODS: In-depth, semi-structured interviews with 44 women in Scotland who had recently undergone TOP ≤63 days of gestation, and who returned home to pass the pregnancy. Data were analysed thematically using an approach informed by the Framework method. MAIN OUTCOME MEASURES: Women's experiences of self-management of TOP ≤63 days of gestation. RESULTS: Key themes emerging from the analysis related to self-administration of misoprostol in clinic; reasons for choosing home self-management; facilitation of self-management and expectation-setting; experiences of getting home; self-managing and monitoring treatment progress; support for self-management (in person and remotely); and pregnancy self-testing to confirm completion. CONCLUSIONS: Participants primarily found self-administration of misoprostol and home self-management to be acceptable and/or preferable, particularly where this was experienced as a decision made jointly with health professionals. The way in which home self-management is presented to women at clinic requires ongoing attention. Women could benefit from the option of home administration of misoprostol. TWEETABLE ABSTRACT: Women undergoing medical TOP 63 days found home self-management to be acceptable and/or preferable.
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Abortivos Esteroides/administração & dosagem , Aborto Induzido/métodos , Aborto Induzido/psicologia , Mifepristona/administração & dosagem , Misoprostol/administração & dosagem , Satisfação do Paciente/estatística & dados numéricos , Autogestão/estatística & dados numéricos , Adulto , Tomada de Decisões , Feminino , Humanos , Relações Enfermeiro-Paciente , Manejo da Dor , Educação de Pacientes como Assunto , Gravidez , Primeiro Trimestre da Gravidez , Pesquisa Qualitativa , Escócia , Autoadministração , Autogestão/psicologia , Adulto JovemRESUMO
AIMS: Continuous subcutaneous insulin infusion delivered via a pump is increasingly recommended for younger children with Type 1 diabetes. Our aims were: to understand the impact on parents who care for young children using insulin pumps; to help interpret psychological outcomes reported in quantitative research; and to inform provision of support to future parents. METHODS: We conducted in-depth interviews with 19 parents of children (aged ≤ 12 years) with Type 1 diabetes who used an insulin pump. Data were analysed thematically. RESULTS: Parents reported multiple benefits from using insulin pumps, including: no longer having to administer painful injections; fewer restrictions on the frequency, timing and carbohydrate contents of snacks and meals; and improvements in family life and their child's glycaemic control. Parents liked and felt less anxious about using bolus calculators to determine insulin doses; however, parents also described undertaking additional and unanticipated work to manage their child's diabetes using a pump. This included performing more blood glucose tests to calculate insulin doses for snacks and to address their concerns that the pump increased their child's risk of hypoglycaemia. Some parents reported doing additional blood glucose checks because they could adjust pump settings to better manage hypo- and hyperglycaemia. CONCLUSIONS: Parents liked and perceived benefits for their child and themselves from using an insulin pump; however, parents would benefit from being made aware of the additional work involved in using a pump and also from education and support to address concerns about hypoglycaemia. Better measures to evaluate parents' experiences are also recommended.
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Cuidadores/psicologia , Diabetes Mellitus Tipo 1/tratamento farmacológico , Insulina/administração & dosagem , Insulina/uso terapêutico , Entrevista Psicológica , Pais/psicologia , Adulto , Glicemia/metabolismo , Criança , Pré-Escolar , Diabetes Mellitus Tipo 1/sangue , Gerenciamento Clínico , Feminino , Humanos , Hipoglicemiantes/administração & dosagem , Hipoglicemiantes/uso terapêutico , Sistemas de Infusão de Insulina , Estilo de Vida , Masculino , Pesquisa Qualitativa , Estudos Retrospectivos , Escócia , Resultado do TratamentoRESUMO
AIMS: To explore the difficulties parents encounter in trying to achieve clinically recommended blood glucose levels and how they could be better supported to optimize their child's glycaemic control. METHODS: In-depth interviews were conducted with 54 parents of children with Type 1 diabetes (≤ 12 years). Data were analysed thematically. RESULTS: Parents described being reluctant and finding it difficult to keep their child's blood glucose levels consistently within clinically recommended ranges. As well as worrying about their child's ability to detect/report hypoglycaemia, parents highlighted a multitude of factors that had an impact on their child's blood glucose levels and over which they could exercise little control. These included: leaving their child with other caregivers who could not be trusted to detect hypoglycaemia; difficulties remotely monitoring and regulating their child's food consumption and activity; and physical and social changes accompanying childhood development. Most parents used two sets of blood glucose targets, with clinically recommended targets employed when their child was in their immediate care and higher targets when in the care of others. Parents described health professionals as lacking understanding of the difficulties they encountered keeping blood glucose within target ranges and needing more empathetic, tailored and realistic advice. CONCLUSION: It is not parents' fear of hypoglycaemia in isolation that leads to decisions to raise their child's blood glucose but, rather, parental fear in conjunction with other factors and considerations. Hence, to improve diabetes management in children, these factors may need to be addressed; for instance, by training others in diabetes management and using new technologies. Changes to consultations are also recommended.
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Atitude Frente a Saúde , Diabetes Mellitus Tipo 1/tratamento farmacológico , Hipoglicemia/prevenção & controle , Hipoglicemiantes/uso terapêutico , Pais , Adulto , Ansiedade , Glicemia/metabolismo , Automonitorização da Glicemia , Cuidadores , Criança , Pré-Escolar , Diabetes Mellitus Tipo 1/metabolismo , Medo , Feminino , Hemoglobinas Glicadas/metabolismo , Humanos , Hipoglicemia/induzido quimicamente , Masculino , Pessoa de Meia-Idade , Pesquisa QualitativaRESUMO
OBJECTIVE: We examined young adults' responses to information about sudden unexpected death in epilepsy (SUDEP). METHOD: Consecutive patients attending a specialist epilepsy clinic, aged 16-30years, with a Hospital Anxiety and Depression Scale (HADS) score of <11, and who had been told about SUDEP at least 2weeks previously, were invited to the study. Semistructured in-depth interviews were conducted by an experienced qualitative interviewer until data saturation was achieved. An inductive thematic analysis of the data was conducted, facilitated by the use of the qualitative data analysis software (NVivo). The study was approved by the South East Scotland Research Ethics Committee. RESULTS: Twenty-seven patients (15 females) aged 18-29years were interviewed. All said that they were satisfied with the information that they had received about SUDEP. However, at the interview, their understanding of SUDEP was often limited and incorrect. Many were not aware of their own SUDEP risk status. Twenty-two (81%) said that everyone should be told about SUDEP. Most thought that disclosure should happen at the time of the diagnosis or soon after, preferably in a face-to-face consultation; clinician judgment on timing was highlighted. Few reported seeking further information on SUDEP for themselves beyond the initial consultation. Most were either untroubled by the initial disclosure of SUDEP or reported initial anxiety that was not long-lasting. A minority reported changing their behavior, for example, improving medication adherence, but most reported no change. The majority expressed a fatalistic view of SUDEP as something outside of their control. SIGNIFICANCE: Our results suggest that clinicians can be more confident that most of their young adult patients want to know about SUDEP, want to be told early, and do not have long-lasting anxiety due to its disclosure. Getting information on SUDEP will not, on its own, increase medication adherence in most patients. Methods to increase patient understanding of SUDEP are needed.
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Morte Súbita , Epilepsia/psicologia , Conhecimentos, Atitudes e Prática em Saúde , Revelação da Verdade , Adolescente , Adulto , Ansiedade/psicologia , Feminino , Humanos , Masculino , Pesquisa Qualitativa , Risco , Adulto JovemRESUMO
BACKGROUND: Controversy has surrounded MMR vaccination in the aftermath of Wakefield's 1998 paper suggesting links between MMR and the development of pervasive developmental disorder in children. The paper sparked off media debate and contributed to a lack of parental trust in health-care providers and reduction in MMR uptake. This review aims to identify and evaluate research on the subject, with a view to present the reasons behind, and influences on parental decision-making in relation to MMR. METHODS: Systematic search strategy identified 14 relevant papers on which thematic analysis was performed. RESULTS: Themes identified were categorized as follows: perceptions of risk; roles and responsibility; experience and knowledge. There were limited changes in parental decision-making factors over the time period despite an increase in uptake. Many studies fail to differentiate between accepters and rejecters, making it difficult to draw out clear conclusions. CONCLUSION: Policymakers need to adapt information provided to address these concerns. Future research should focus more on distinguishing between accepters and rejecters to determine which factors can alter outcome.
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Tomada de Decisões , Pais/psicologia , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Vacina contra Sarampo-Caxumba-Rubéola , Aceitação pelo Paciente de Cuidados de SaúdeRESUMO
According to the Centers for Medicare and Medicaid Services (CMS), the Consolidated Medicare and Medicaid regulations have not been systematically reviewed and updated since 1991. Existing regulations require that, with certain exceptions, an RN provide services in a facility for 8 consecutive hours per day, 7 days per week; licensed practical nurses (LPNs) 24 hours per day; and sufficient staff to meet residents' needs. The requirements to determine "sufficient" staff remain undefined by CMS. Several national organizations support RN staffing 24 hours per day each day of the week (24/7). These organizations provided evidence refuting CMS' position that it does not have sufficient information at this time to require a specific number of staff or hours of nursing care per resident. Consideration should be given to the Institute of Medicine recommendation affrming the need for and requiring the presence of at least one RN within every nursing home facility at all times. Currently, there is a bill in the House of Representatives that supports 24/7 RN coverage in nursing homes, which must become both bipartisan and bicameral to be passed.
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Casas de Saúde , Recursos Humanos de Enfermagem/provisão & distribuição , Admissão e Escalonamento de Pessoal/organização & administração , Humanos , Estados Unidos , Recursos HumanosRESUMO
The intricacies of the unique educational and leadership development trajectories of Black PhD-prepared nurse scientists are largely invisible in nursing faculty development literature. A broadened understanding of nursing leadership development and science mentorship can facilitate support for the next generation of Black nurse scientists. Historically Black Colleges and Universities (HBCUs) can serve as formative launch pads for nurse scientist development. However, the role of HBCUs and strategies for supporting robust educational and mentor/training opportunities for Black PhD-prepared nurse scientists require thoughtful description and application. Incorporating an intrapersonal, interpersonal, and integrative leadership framework, we describe and synthesize four Black nurse scientists and HBCU graduates' experiences to highlight early science mentorship and leadership resilience through the excellent educational foundations provided at HBCUs.
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Negro ou Afro-Americano , Docentes de Enfermagem , Liderança , Universidades , Humanos , MentoresRESUMO
Carbon (C) dynamics of boreal forest ecosystems have substantial implications for efforts to mitigate the rise of atmospheric CO2 and may be substantially influenced by warming and changing wildfire regimes. In this study we applied a large-scale ecosystem model that included dynamics of organic soil horizons and soil organic matter characteristics of multiple pools to assess forest C stock changes of the Yukon River Basin (YRB) in Alaska, USA, and Canada from 1960 through 2006, a period characterized by substantial climate warming and increases in wildfire. The model was calibrated for major forests with data from long-term research sites and evaluated using a forest inventory database. The regional assessment indicates that forest vegetation C storage increased by 46 Tg C, but that total soil C storage did not change appreciably during this period. However, further analysis suggests that C has been continuously lost from the mineral soil horizon since warming began in the 1970s, but has increased in the amorphous organic soil horizon. Based on a factorial experiment, soil C stocks would have increased by 158 Tg C if the YRB had not undergone warming and changes in fire regime. The analysis also identified that warming and changes in fire regime were approximately equivalent in their effects on soil C storage, and interactions between these two suggests that the loss of organic horizon thickness associated with increases in wildfire made deeper soil C stocks more vulnerable to loss via decomposition. Subbasin analyses indicate that C stock changes were primarily sensitive to the fraction of burned forest area within each subbasin and that boreal forest ecosystems in the YRB are currently transitioning from being sinks to sources at -0.7% annual area burned. We conclude that it is important for international mitigation efforts focused on controlling atmospheric CO2 to consider how climate warming and changes in fire regime may concurrently affect the CO2 sink strength of boreal forests. It is also important for large-scale biogeochemical and earth system models to include organic soil dynamics in applications to assess regional C dynamics of boreal forests responding to warming and changes in fire regime.
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Mudança Climática , Ecossistema , Incêndios , Rios , Árvores , Modelos Biológicos , Dinâmica Populacional , Solo , Fatores de Tempo , YukonRESUMO
The ability to locate the right research tool at the right time for recruitment and retention of minority and health disparity populations is a challenge. This article provides an introduction to a number of recruitment and retention tools in a National Institute on Aging Health Disparities Toolbox and to this special edition on challenges and opportunities in recruitment and retention of minority populations in Alzheimer disease and dementia research. The Health Disparities Toolbox and Health Disparities Resource Persons Network are described along with other more established resource tools including the Alzheimer Disease Center Education Cores, Alzheimer Disease Education and Referral Center, and Resource Centers for Minority Aging Research. Nine featured articles are introduced. The articles address a range of concerns including what we know and do not know, conceptual and theoretical perspectives framing issues of diversity and inclusion, success as a result of sustained investment of time and community partnerships, the significant issue of mistrust, willingness to participate in research as a dynamic personal attribute, Helpline Service and the amount of resources required for success, assistance in working with Limited English Proficiency elders, and sage advice from social marketing and investigations of health literacy as a barrier to recruitment and retention. Finally, an appeal is made for scientists to share tools for the National Institute on Aging Health Disparity Toolbox and to join the Health Disparities Resource Persons Network.
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Doença de Alzheimer , Disparidades nos Níveis de Saúde , National Institute on Aging (U.S.) , Seleção de Pacientes , Apoio à Pesquisa como Assunto , Doença de Alzheimer/etnologia , Doença de Alzheimer/terapia , Pesquisa Biomédica , Relações Comunidade-Instituição , Diversidade Cultural , Humanos , Serviços de Informação , Educação de Pacientes como Assunto , Estados UnidosRESUMO
Recombinant DNA methods were used to create artificial proteins that undergo reversible gelation in response to changes in pH or temperature. The proteins consist of terminal leucine zipper domains flanking a central, flexible, water-soluble polyelectrolyte segment. Formation of coiled-coil aggregates of the terminal domains in near-neutral aqueous solutions triggers formation of a three-dimensional polymer network, with the polyelectrolyte segment retaining solvent and preventing precipitation of the chain. Dissociation of the coiled-coil aggregates through elevation of pH or temperature causes dissolution of the gel and a return to the viscous behavior that is characteristic of polymer solutions. The mild conditions under which gel formation can be controlled (near-neutral pH and near-ambient temperature) suggest that these materials have potential in bioengineering applications requiring encapsulation or controlled release of molecular and cellular species.
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Proteínas de Transporte/química , Géis , Polietilenoglicóis/química , Engenharia de Proteínas , Estrutura Secundária de Proteína , Proteínas Recombinantes/química , Sequência de Aminoácidos , Proteínas de Transporte/isolamento & purificação , Fenômenos Químicos , Físico-Química , Dicroísmo Circular , Dimerização , Eletrólitos , Genes Sintéticos , Hidrogel de Polietilenoglicol-Dimetacrilato , Concentração de Íons de Hidrogênio , Zíper de Leucina , Dados de Sequência Molecular , Polietilenoglicóis/isolamento & purificação , Polímeros , Dobramento de Proteína , Proteínas Recombinantes/isolamento & purificação , Temperatura , ViscosidadeRESUMO
Deglaciation of the Laurentide Ice Sheet in North America was accompanied by sequestration of organic carbon in newly exposed soils. The greatest rate of land exposure occurred around 12,000 to 8,000 years ago, and the greatest increase in the rate of carbon sequestration by soils occurred from 8,000 to 4,000 years ago. Sequestration of carbon in deglaciated peat lands continues today, and a steady state has not been reached. The natural rate of carbon sequestration in soils, however, is small relative to the rate of anthropogenic carbon dioxide production.