Scale-up

放大
  • 文章类型: Journal Article
    许多有影响力的政策和科学机构呼吁在扩大儿童和青少年心理健康服务(CYMHS)方面取得更快的进展。CYMHS的许多创新为推进规模扩大提供了希望,但对现实世界的努力进展知之甚少。我们进行了范围审查,以确定在全球范围内扩大CYMHS的有希望的方法。在六个数据库中完成了搜索(学术搜索完成,CINAHL,MEDLINE,PsychInfo,PubMed,和WebofScience)。根据系统审查的首选报告项目和范围审查的荟萃分析扩展(PRISMA-ScR)清单进行文章选择和综合。根据Cochrane图书馆推荐的世界银行列出的LMIC国家的搜索过滤器,对中低收入国家(LMIC)进行了第二次搜索。作者在标题/摘要和全文审查中使用了双重编码策略。确定了符合资格标准的28篇文章,其中描述了22项举措(在11个不同的国家)。我们的审查发现,CYMHS中已发表的大多数扩大研究都没有通过设计或报告中的扩大框架来了解。尽管出现了有希望的方法,但已确定的文章中使用的方法和结果差异很大,限制了我们得出比较有效性结论的能力。在我们的评论中确定的成功和失败在很大程度上反映了更广泛的文献中的共识,即需要策略来更好地应对系统和政策实施的复杂性,同时确保CYMHS干预措施适合当地环境。
    Numerous influential policy and scientific bodies are calling for more rapid advances in the scale-up of child and youth mental health services (CYMHS). A number of CYMHS innovations hold promise for advancing scale-up but little is known about how real-world efforts are progressing. We conducted a scoping review to identify promising approaches to CYMHS scale-up across the globe. Searches were completed in six databases (Academic Search Complete, CINAHL, MEDLINE, PsychInfo, PubMed, and Web of Science). Article selection and synthesis were conducted in accordance to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Reviews (PRISMA-ScR) checklist. A second search focused on low-and-middle-income countries (LMIC) was conducted based on the Cochrane Library recommended search filters of the World Bank listed LMIC countries. Authors used a double coding strategy during the title/abstract and full-text review. Twenty-eight articles meeting the eligibility criteria were identified that described 22 initiatives (in 11 different countries). Our review found the majority of published scale-up studies in CYMHS were not informed by scale-up frameworks in design or reporting. The methods and outcomes used in the identified articles were highly variable and limited our ability to draw conclusions about comparative effectiveness although promising approaches emerged. Successes and failures identified in our review largely reflect consensus in the broader literature regarding the need for strategies to better navigate the complexities of system and policy implementation while ensuring CYMHS interventions fit local contexts.
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  • 文章类型: Journal Article
    α-淀粉酶是代表具有显著长期全球需求的十亿美元市场的必需生物催化剂。他们有各种各样的应用范围从洗涤剂,纺织品,和食品行业,如面包店,最近,生物燃料工业。微生物α-淀粉酶由于在温度和pH极限下通常具有良好的活性和更好的稳定性而优于其植物和动物对应物。随着应用范围的扩大,对新的和改进的α-淀粉酶的需求不断增长。然而,微生物α-淀粉酶技术从实验室推广到工业实际应用受到几个问题的阻碍,从传质限制,酶产量低,和能源密集型产品回收,增加了高生产成本。这篇综述强调了微生物α-淀粉酶生产的主要挑战和前景,考虑到工业生物加工的各种途径,如独立于文化的方法,营养优化,设计改进的生物反应器操作,和产品下游方法,以开发具有高活性和可回收性的高效α-淀粉酶。由于酶的序列和结构在调节其功能特性中起着至关重要的作用,我们还试图分析微生物α-淀粉酶的结构组成,作为其热力学性质的指导,以确定可以通过各种固定化或选择性酶工程方法来增强酶的催化活性和热稳定性的区域。此外,已经简要讨论了利用廉价和可再生的底物来生产酶以非常规应用分离α-淀粉酶。
    α-Amylases are essential biocatalysts representing a billion-dollar market with significant long-term global demand. They have varied applications ranging from detergent, textile, and food sectors such as bakery to, more recently, biofuel industries. Microbial α-amylases have distinct advantages over their plant and animal counterparts owing to generally good activities and better stability at temperature and pH extremes. With the scope of applications expanding, the need for new and improved α-amylases is ever-growing. However, scaling up microbial α-amylase technology from the laboratory to industry for practical applications is impeded by several issues, ranging from mass transfer limitations, low enzyme yields, and energy-intensive product recovery that adds to high production costs. This review highlights the major challenges and prospects for the production of microbial α-amylases, considering the various avenues of industrial bioprocessing such as culture-independent approaches, nutrient optimization, bioreactor operations with design improvements, and product down-streaming approaches towards developing efficient α-amylases with high activity and recyclability. Since the sequence and structure of the enzyme play a crucial role in modulating its functional properties, we have also tried to analyze the structural composition of microbial α-amylase as a guide to its thermodynamic properties to identify the areas that can be targeted for enhancing the catalytic activity and thermostability of the enzyme through varied immobilization or selective enzyme engineering approaches. Also, the utilization of inexpensive and renewable substrates for enzyme production to isolate α-amylases with non-conventional applications has been briefly discussed.
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  • 文章类型: Systematic Review
    目的:儿童早期教育和护理(ECEC)是提供“大规模”健康饮食干预措施(即大量儿童保育服务)以改善儿童公共卫生营养的推荐环境。建议评估干预措施的“可扩展性”(大规模交付的适用性),以指导公共卫生决策。这项研究描述了在基于ECEC的健康饮食干预措施中报告评估可扩展性所需的因素的程度。
    方法:包括来自最近的Cochrane系统评价的研究,该研究评估了ECEC提供的健康饮食干预措施对改善儿童饮食摄入量的有效性。根据干预可扩展性评估工具(ISAT)中概述的领域评估了可扩展性因素的报告。该工具建议决策者考虑这个问题,干预,战略和政治背景,有效性,成本,保真度和适应性,达到和可接受性,交付设置和劳动力,实施基础设施,和可持续性。数据由一名审阅者提取,并由另一名审阅者检查。
    方法:ECEC。
    方法:6个月至6岁的儿童。
    结果:在38项纳入研究中,没有人报告ISAT中的所有因素。所有研究都报告了这个问题,干预,有效性,以及交付人员和设置。报道的最低领域是干预成本(13%的研究)和可持续性(16%的研究)。
    结论:研究结果表明,缺乏关于基于ECEC的健康饮食干预措施可扩展性的一些关键因素的报告。未来的试验应测量和报告这些因素,以提供重要信息,以支持政策和实践决策者选择要扩大的干预措施。
    OBJECTIVE: Early childhood education and care (ECEC) is a recommended setting for the delivery of health eating interventions \'at scale\' (i.e. to large numbers of childcare services) to improve child public health nutrition. Appraisal of the \'scalability\' (suitability for delivery at scale) of interventions is recommended to guide public health decision-making. This study describes the extent to which factors required to assess scalability are reported among ECEC-based healthy eating interventions.
    METHODS: Studies from a recent Cochrane systematic review assessing the effectiveness of healthy eating interventions delivered in ECEC for improving child dietary intake were included. The reporting of factors of scalability was assessed against domains outlined within the Intervention Scalability Assessment Tool (ISAT). The tool recommends decision makers consider the problem, the intervention, strategic and political context, effectiveness, costs, fidelity and adaptation, reach and acceptability, delivery setting and workforce, implementation infrastructure and sustainability. Data were extracted by one reviewer and checked by a second reviewer.
    METHODS: ECEC.
    METHODS: Children 6 months to 6 years.
    RESULTS: Of thirty-eight included studies, none reported all factors within the ISAT. All studies reported the problem, the intervention, effectiveness and the delivery workforce and setting. The lowest reported domains were intervention costs (13 % of studies) and sustainability (16 % of studies).
    CONCLUSIONS: Findings indicate there is a lack of reporting of some key factors of scalability for ECEC-based healthy eating interventions. Future studies should measure and report such factors to support policy and practice decision makers when selecting interventions to be scaled-up.
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  • 文章类型: Journal Article
    高品位和粗粒矿石的枯竭导致对开发低品位和细粒矿石的高效分离技术的需求日益增加。然而,传统的泡沫浮选技术不足以有效地回收细颗粒和超细颗粒(通常<10-15μm),这是由于这些颗粒和在该过程中使用的相对大的气泡之间的低碰撞概率。微泡的引入在提高颗粒回收率方面显示出了希望,使它成为一个非常感兴趣的主题。因此,这篇综述侧重于微气泡生成方法,这些方法有可能扩大用于工业应用,特别强调它们对泡沫浮选的适用性。这些方法根据其可扩展性进行分类:高水力空化,多孔介质/中等溶解空气,电解/低微流体,和声学方法。气泡产生机制,特点,讨论了各种方法的优缺点及其在泡沫浮选中的应用,并提出了改进建议。仍然没有合适的技术可以优化气泡尺寸分布,工业泡沫浮选应用的生产率和成本。因此,还探索了多种方法结合的新方法,以实现潜在的协同作用。通过解决当前微泡生成方法的局限性并提出潜在的增强功能,这篇综述旨在为泡沫浮选行业中的细颗粒和超细颗粒开发高效和具有成本效益的微气泡生成技术做出贡献。
    The depletion of high-grade and coarse-grain ores has led to an increasing demand for the development of efficient separation technologies for low-grade and fine-grain ores. However, conventional froth flotation techniques are not adequate to efficiently recover fine and ultrafine particles (typically <10-15 μm) due to the low collision probability between these particles and the relatively large bubbles used in the process. The introduction of microbubbles has shown promise in enhancing particle recovery, making it a subject of significant interest. Thus, this review focuses on microbubble generation methods that have the potential to be scaled up for industrial applications, with a specific emphasis on their suitability for froth flotation. The methods are categorized based on their scalability: high-hydrodynamic cavitation, porous media/medium-dissolved air, electrolysis/low-microfluidics, and acoustic methods. The bubble generation mechanisms, characteristics, advantages and limitations of each method and its applications in froth flotation are discussed to provide suggestions for improvement. There is still no appropriate technology that can optimize bubble size distribution, production rate and cost together for industrial froth flotation application. Therefore, novel approaches of combining multiple methods are also explored to achieve the potential synergic effects. By addressing the limitations of current microbubble generation methods and proposing potential enhancements, this review aims to contribute to the development of efficient and cost-effective microbubble generation technologies for fine and ultrafine particles in the froth flotation industry.
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  • 文章类型: Journal Article
    背景:包括外部上下文在内的上下文可能会极大地影响采用,实施,维持,和扩大循证实践。我们通过对有关实施名为“个人安置和支持”(IPS)的循证精神病学或心理健康职业康复服务的实证研究进行范围审查,调查了外部背景特征。
    方法:范围审查的方案已在开放科学框架中注册。我们使用JoannaBriggs研究所的方法进行范围审查,并根据PRISMA-ScR清单进行报告。我们搜索了12个数据库,以进行有关“个人安置和支持”或“基于证据的支持就业”的研究。我们保留了同行评审的实证研究,调查了外部环境因素及其对IPS实施结果的影响。我们从符合条件的文章中提取数据,并进行描述性和主题分析。
    结果:59篇原创研究论文符合我们的资格要求,并在审查了1124篇标题和摘要以及119篇全文后被保留。分析产生了两个主要主题:(1)服务提供的外部上下文决定因素,以及(2)影响证据到实践过程的外部系统。第一个主题包括政策和法律,融资,和行政机构的支持资源,以及与可能促进或阻碍本地实施的外部利益相关者相关的组织安排。第二个主题包括不同利益攸关方为促进当地执行或在系统一级扩大努力而使用的战略和行动。
    结论:我们的范围界定综述说明了外部情境因素发挥的重要作用,以及它们如何促进或阻碍IPS模式在不同国家的精神卫生服务机构中的实施和扩大。心理健康和福利服务决策者考虑这些因素,规划者,提供者,从业人员可能会促进制定有效的战略,以弥合实施EBPs的证据与实践差距。最后,范围审查发现了知识方面的差距,并为未来的研究提供了建议。
    背景:开放科学框架。
    Context including the external context may considerably affect the adoption, implementation, sustainment, and scale-up of evidence-based practices. We investigated external contextual features by conducting a scoping review of empirical research regarding the implementation of an evidence-based psychiatric or mental health vocational rehabilitation service called Individual Placement and Support (IPS).
    The protocol for the scoping review was registered with the Open Science Framework. We used the methodology by Joanna Briggs Institute for conducting the scoping review and reported it according to the PRISMA-ScR checklist. We searched 12 databases for research regarding \'Individual Placement and Support\' or \'Evidence-Based Supported Employment\'. We retained peer-reviewed empirical studies investigating external contextual factors and their impact on IPS implementation outcomes. We extracted data from the eligible articles and conducted descriptive and thematic analyses.
    Fifty-nine original research papers met our eligibility requirements and were retained after reviewing 1124 titles and abstracts and 119 full texts. The analysis generated two main themes: (1) external contextual determinants of service delivery and (2) external systems influencing the evidence-to-practice process. The first main theme encompassed policies and laws, financing, and administratively instituted support resources, and organizational arrangements associated with external stakeholders that may facilitate or hinder the local implementation. The second main theme comprised strategies and actions used by different stakeholders to facilitate implementation locally or scale-up efforts at a system level.
    Our scoping review illustrates the important role that external contextual factors play and how they may facilitate or hinder the implementation and scale-up of the IPS model across mental health services in different countries. Consideration of these factors by decision-makers in mental health and welfare services, planners, providers, and practitioners is likely to facilitate the development of effective strategies for bridging the evidence-practice gap in implementing the EBPs. Finally, the scoping review identified gaps in knowledge and offered suggestions for future research.
    Open Science Framework.
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  • 文章类型: Journal Article
    背景:确保获得高质量的计划生育(FP)服务对于实现可持续发展目标(SDG)目标3.1、3.7和5.6,包括普遍获得生殖健康服务至关重要。然而,卫生劳动力短缺和对中下层卫生劳动力干部作用的限制性政策等障碍限制了在许多情况下获得避孕药具和FP的机会。劳动力重组可以更有效地利用人力资源。因此,世界卫生组织(世卫组织)建议不同干部分担FP的任务。关于实施战略的证据,主持人,扩大和维持任务共享的障碍可以为融资提供信息,实施方法,以及国家和全球FP任务共享计划的技术援助。因此,这项研究旨在描述和评估实施策略的证据质量,主持人,以及扩大和维持FP任务共享的障碍,以及扩大规模/可持续性干预措施的结果。
    方法:本系统综述方案是使用相关指南制定的,包括系统评价和荟萃分析(PRISMA)方案(PRISMA-P)的首选报告项目。搜索五个数据库,namelyCINAHL(EBSCOhost),EMBASE(OvidSP),全球卫生(OvidSP),MEDLINE(OvidSP),和Scopus(www.scopus.com),将进行灰色文献资源。两名独立的审稿人将筛选和选择研究,使用“混合方法评估工具”评估其质量,并从符合条件的研究中提取数据。出版物或文章如果报告实施战略,则符合资格,主持人,或FP/避孕中任务分担的扩大/可持续性障碍或扩大/可持续性干预措施的结果。一种融合定性、定量,描述性,描述性和混合方法数据到一个数据集中将用于基于先验框架的分析-卫生系统框架的Cochrane有效实践和护理组织(EPOC)分类法。两名独立评审员将使用GRADE-CERQual指南评估证据质量。
    结论:据我们所知,对实施战略的系统审查,主持人,扩大和维持计划生育任务分担的障碍是这一领域的首要问题。我们基于最新指南的严格方法可以帮助生成相关建议,以支持干预措施,以扩大和维持计划生育中的任务分担。
    背景:PROSPEROCRD42022339885。
    Ensuring access to quality family planning (FP) services is fundamental to achieving the Sustainable Development Goals (SDG) targets 3.1, 3.7, and 5.6, including universal access to reproductive health services. However, barriers such as health workforce shortages and restrictive policies on the role of mid and lower-level health workforce cadres limit access to contraceptives and FP in many settings. Workforce reorganization makes more efficient use of human resources. Consequently, the World Health Organization (WHO) recommends task-sharing for FP by different cadres. Evidence on the implementation strategies, facilitators, and barriers to scaling up and sustaining task-sharing could inform financing, implementation approaches, and technical assistance of national and global FP task-sharing programs. Therefore, this study aims to describe and assess the quality of the evidence on implementation strategies, facilitators, and barriers to scaling up and sustaining task-sharing in FP and the outcome of the scale-up/sustainability interventions.
    This systematic review protocol was developed using relevant guidelines, including the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) Protocols (PRISMA-P). A search of five databases, namely CINAHL (EBSCOhost), EMBASE (OvidSP), Global Health (OvidSP), MEDLINE (OvidSP), and Scopus ( www.scopus.com ), and gray literature resources will be conducted. Two independent reviewers will screen and select studies, assess their quality using the \"Mixed Methods Appraisal Tool,\" and extract data from eligible studies. Publications or articles are eligible if they report implementation strategies, facilitators, or barriers to scaling up/sustainability of task-sharing in FP/contraception or the outcomes of the scale-up/sustainability interventions. A convergent synthesis that integrates qualitative, quantitative, descriptive, and mixed-methods data into one dataset will be used for analysis based on an a priori framework-the Cochrane Effective Practice and Organization of Care (EPOC) taxonomy of the health system framework. Two independent reviewers will assess the quality of evidence using the GRADE-CERQual guideline.
    To our knowledge, this systematic review of implementation strategies, facilitators, and barriers to scaling up and sustaining task-sharing in family planning is the first in this area. Our rigorous methodology based on up-to-date guidelines can help generate relevant recommendations to support interventions to scale up and sustain task-sharing in family planning.
    PROSPERO CRD42022339885.
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  • 文章类型: Journal Article
    在许多国家/地区注册了自行施用的仓库醋酸甲羟孕酮皮下注射避孕(DMPA-SC)。它显示出改善避孕方法的巨大潜力,延续,和自主性。然而,推出这种新的有效干预措施面临挑战,在扩大规模过程中遇到了重大的实施问题。
    为了描述扩大自我管理DMPA-SC的实施策略和障碍,主持人,以及这些计划的结果。
    最近的指导方针,包括用于范围审查的系统审查和荟萃分析(PRISMA)扩展的首选报告项目,用于设计和报告这篇综述。如果一篇文章或报告报告的干预措施可以扩大自我管理的DMPA-SC实施或其促进者,则有资格纳入。障碍,或结果。我们搜索了六个电子数据库和灰色文献,以查找合格的文章和报告。两名审阅者独立筛选了文档标题,摘要,和全文来识别合格的文件。使用结构化形式提取数据。使用卫生系统的有效实践和组织(EPOC)分类法框架进行主题分析,数据以叙事方式呈现。
    在检索到的755个文档中,这次审查包括34个。所包括的大多数文件是多国报告(n=14),所有文件均在过去5年(2018-2021年)内发布。本综述确定了报告所有EPOC领域干预措施的文件。报告最多的干预措施是:卫生工作人员干部之间的任务共享,从事领导,鼓励政策,培训和教育,DMPA-SC需求生成,整合到现有程序中,改善筹资机制,与发展伙伴合作,加强供应链。主要障碍是资金欠佳,人力资源不足,DMPA-SC物流供应不足。放大结果的证据很少。
    本范围审查报告了各国和项目采用的各种干预措施来扩大DMPA-SC的自我管理,但对扩大结果的证据很少。此次审查的证据可以帮助设计更好的计划,以改善获得优质计划生育服务的机会,以实现可持续发展目标(SDG)的目标3.7。然而,努力应集中在严格的实施研究上,以评估扩大的自我管理的DMPA-SC干预措施并报告其结果.
    本次审查的协议已在protocols.io存储库中注册(https://www.protocols.io/view/a-protocol-for-a-scoping-review-of-implementation-x54v9yemmg3e/v1)。
    Self-administered depot medroxyprogesterone acetate subcutaneous injectable contraception (DMPA-SC) is registered in many countries. It shows great potential for improving contraceptive access, continuation, and autonomy. However, there are challenges in rolling out this new efficacious intervention, and major implementation problems have been encountered during scale-up.
    To describe the implementation strategies to scale up self-administered DMPA-SC and the barriers, facilitators, and outcomes of these programs.
    Recent guidelines, including the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) extension for scoping reviews, were used to design and report this review. An article or report was eligible for inclusion if it reported interventions that could scale up self-administered DMPA-SC implementation or its facilitators, barriers, or outcomes. We searched six electronic databases and the grey literature for eligible articles and reports. Two reviewers independently screened the document titles, abstracts, and full texts to identify eligible documents. Data were extracted using structured forms. Using the Effective Practice and Organization of Care (EPOC) taxonomy of health systems framework for thematic analysis, data were presented in a narrative approach.
    Of the 755 retrieved documents, 34 were included in this review. Most of the documents included were multi-country reports (n = 14), and all documents were published within the last 5 years (2018-2021). This review identified documents that reported interventions in all EPOC domains. The most-reported interventions were: task-sharing amongst health workforce cadres, engaged leadership, encouraging policies, training and education, DMPA-SC demand generation, integration into existing programs, improved funding mechanisms, collaboration with development partners, and supply chain strengthening. The main barriers were suboptimal funding, inadequate human resources, and poor logistics supply of DMPA-SC. There was minimal evidence of scale-up outcomes.
    This scoping review reported a wide range of interventions employed by countries and programs to scale up DMPA-SC self-administration but minimal evidence of the scale-up outcomes. Evidence from this review can help design better programs that improves access to quality family planning services to achieve the Sustainable Development Goals (SDG) targets 3.7. However, efforts should focus on rigorous implementation research that assess scaled up self-administered DMPA-SC interventions and report their outcomes.
    The protocol for this review was registered in the protocols.io repository ( https://www.protocols.io/view/a-protocol-for-a-scoping-review-of-implementation-x54v9yemmg3e/v1 ).
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  • 文章类型: Journal Article
    Recombinant proteins (RP) are widely used as biopharmaceuticals, industrial enzymes, or sustainable food source. Yeasts, with their ability to produce complex proteins through a broad variety of cheap carbon sources, have emerged as promising eukaryotic production hosts. As such, the prevalence of yeasts as favourable production organisms in commercial RP production is expected to increase. Yet, with the selection of a robust production host on the one hand, successful scale-up is dependent on a thorough understanding of the challenging environment and limitations of large-scale bioreactors on the other hand. In the present work, several prominent yeast species, including Saccharomyces cerevisiae, Pichia pastoris, Yarrowia lipolytica, Kluyveromyces lactis and Kluyveromyces marxianus are reviewed for their current state and performance in commercial RP production. Thereafter, the impact of principal process control parameters, including dissolved oxygen, pH, substrate concentration, and temperature, on large-scale RP production are discussed. Finally, technical challenges of process scale-up are identified. To that end, process intensification strategies to enhance industrial feasibility are summarized, specifically highlighting fermentation strategies to ensure sufficient cooling capacity, overcome oxygen limitation, and increase protein quality and productivity. As such, this review aims to contribute to the pursuit of sustainable yeast-based RP production.
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  • 文章类型: Journal Article
    背景:基于社区的计划[CBPs],目标是增加身体活动和/或更健康的饮食,已用于预防和管理非传染性疾病。然而,CBPs只是有用的,只要它们可以以某种有意义的方式扩大和维持。社交网络-定义为“存在于行为者之间的社会结构,个人或组织“-可以作为识别有助于这一过程的潜在机制的重要工具。本范围审查旨在绘制和整理有关社会网络研究在中低收入国家[LMICs]中扩大和维持身体活动和/或饮食CBPs的作用的文献。
    方法:遵循Arksey和O\'Malley的框架及其增强。纳入标准是同行评审的文章,探讨了社交网络在成人人群中扩大和/或持续的身体活动和/或饮食CBPs中的作用,自2000年以来以英文出版,并以LMIC为基础。搜索的数据库是PubMed,科克伦,Scopus,WebofScience,CINAHL,SocIndex,国际社会科学书目,谷歌学者。书籍,会议摘要,以儿童为重点的方案被排除在外。两名评审员独立选择并提取了符合条件的研究。使用框架方法对纳入的出版物进行了主题分析。
    结果:作者确定了12篇文章,涵盖13个CBPs。大多数总部设在拉丁美洲,加勒比海的其他人,太平洋岛屿,伊朗,和印度。所有文章均自2009年以来发表。只有三个使用社会网络分析方法(其他人使用定性方法)。确定了五个主要的社交网络主题:集中化,集团,领导人,质量大于数量,和共同的目标。还确定了在中等收入国家扩大计划时要考虑的背景因素。
    结论:这篇综述表明,在计划扩大中使用社交网络研究的证据尚未赶上其理论可能性。旨在扩大规模的计划应考虑进行社会网络研究,并考虑已确定的网络主题,以帮助改善哪些网络机制的证据基础,在什么情况下,可能最好地支持加强体育活动和饮食计划中的网络。重要的是,不应忘记这些网络中个人和社区的声音。
    Community-based programmes [CBPs], targeting increased physical activity and/or healthier eating, have been used in the prevention and management of non-communicable diseases. However, CBPs are only useful, insofar as they can be scaled up and sustained in some meaningful way. Social networks-defined as \"social structures that exists between actors, individuals or organizations\"-may serve as an important tool to identify underlying mechanisms that contribute to this process. This scoping review aimed to map and collate literature on the role of social network research in scaling-up and sustaining physical activity and/or diet CBPs in low-and middle-income countries [LMICs].
    Arksey and O\'Malley\'s framework and its enhancement were followed. Inclusion criteria were peer-reviewed articles exploring the role of social networks in scaled-up and/or sustained physical activity and/or diet CBPs in adult populations, published in English since 2000, and based in a LMIC. Databases searched were PubMed, Cochrane, Scopus, Web of Science, CINAHL, SocIndex, International Bibliography of the Social Sciences, and Google Scholar. Books, conference abstracts, and programmes focused on children were excluded. Two reviewers independently selected and extracted eligible studies. Included publications were thematically analysed using the Framework Approach.
    Authors identified 12 articles for inclusion, covering 13 CBPs. Most were based in Latin America, with others in the Caribbean, the Pacific Islands, Iran, and India. All articles were published since 2009. Only three used social network analysis methods (with others using qualitative methods). Five main social network themes were identified: centralisation, cliques, leaders, quality over quantity, and shared goals. Contextual factors to be considered when scaling-up programmes in LMICs were also identified.
    This review has shown that the evidence of the use of social network research in programme scale-up has not yet caught up to its theoretical possibilities. Programmes aiming to scale should consider conducting social network research with identified network themes in mind to help improve the evidence-base of what network mechanisms, in what contexts, might best support the strengthening of networks in physical activity and diet programmes. Importantly, the voice of individuals and communities in these networks should not be forgotten.
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  • 文章类型: Journal Article
    固体脂质纳米颗粒(SLN)是脂质体的替代载体系统,聚合物纳米颗粒,和无机载体。近年来,SLN在提供药物方面引起了越来越多的关注,核酸,蛋白质,肽,营养食品,和化妆品。这些纳米载体由于其易于制备而引起了工业界的关注,物理化学稳定性,和可扩展性。这些特征使得SLN对于大规模制造具有吸引力。目前,几种带有SLN的产品正在临床试验中,SLN运营商极有可能迅速增加其在市场中的存在。商业应用需要大规模生产单位来制备足够的制剂用于临床研究。此外,连续加工在制药行业越来越受欢迎,以减少产品批次之间的差异。本文讨论了一些常规方法和大规模生产的基本原理。它进一步涵盖了SLN合成放大方法的最新进展,包括高压均质化(HPH),热熔挤出与HPH相结合,微通道,使用静态混合器进行纳米沉淀,和基于微乳液的方法。这些扩大规模的技术使SLN有可能商业化。此外,正在进行的研究表明,这些技术最终将进入制药市场。
    Solid lipid nanoparticles (SLNs) are an alternate carrier system to liposomes, polymeric nanoparticles, and inorganic carriers. SLNs have attracted increasing attention in recent years for delivering drugs, nucleic acids, proteins, peptides, nutraceuticals, and cosmetics. These nanocarriers have attracted industrial attention due to their ease of preparation, physicochemical stability, and scalability. These characteristics make SLNs attractive for manufacture on a large scale. Currently, several products with SLNs are in clinical trials, and there is a high possibility that SLN carriers will quickly increase their presence in the market. A large-scale manufacturing unit is required for commercial applications to prepare enough formulations for clinical studies. Furthermore, continuous processing is becoming more popular in the pharmaceutical sector to reduce product batch-to-batch differences. This review paper discusses some conventional methods and the rationale for large-scale production. It further covers recent progress in scale-up methods for the synthesis of SLNs, including high-pressure homogenization (HPH), hot melt extrusion coupled with HPH, microchannels, nanoprecipitation using static mixers, and microemulsion-based methods. These scale-up technologies enable the possibility of commercialization of SLNs. Furthermore, ongoing studies indicate that these technologies will eventually reach the pharmaceutical market.
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