pasteurization

巴氏杀菌
  • 文章类型: Journal Article
    为医疗服务提供者提供指导,荒野用户,和旅行者,荒野医学会召集了一个专家小组,以制定基于证据的指南,用于在无法确保可用水的可利用性的情况下处理水,包括荒野和国际旅行,受灾害影响的地区,和其他没有适当卫生设施的地区。该指南提出了减少或消除个人水微生物污染的可用方法,groups,或家庭;对其有效性的评估;以及实际考虑。证据基础包括实验室和临床出版物。小组根据美国胸科医师学会发布的标准,根据支持证据的质量以及收益和风险/负担之间的平衡对建议进行分级。
    To provide guidance to medical providers, wilderness users, and travelers, the Wilderness Medical Society convened an expert panel to develop evidence-based guidelines for treating water in situations where the potability of available water is not assured, including wilderness and international travel, areas impacted by disaster, and other areas without adequate sanitation. The guidelines present the available methods for reducing or eliminating microbiological contamination of water for individuals, groups, or households; evaluation of their effectiveness; and practical considerations. The evidence base includes both laboratory and clinical publications. The panel graded the recommendations based on the quality of supporting evidence and the balance between benefits and risks/burdens according to the criteria published by the American College of Chest Physicians.
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  • 文章类型: Journal Article
    未经证实:牛乳蛋白过敏(CMPA)的免疫发病机制是基于与蛋白质表位的免疫识别相关的不同机制,受到工业加工的影响。
    UASSIGNED:这篇WAODRACMA论文的目的是:(i)对牛奶蛋白过敏原进行全面概述,(ii)在工业加工的背景下审查其免疫原性和变应原性,和(iii)审查引发IgE介导的立即型超敏反应的牛奶相关免疫机制,混合反应和非IgE介导的超敏反应。
    未经批准:主要的牛奶过敏原-α-乳白蛋白,β-乳球蛋白,血清白蛋白,酪蛋白,牛血清白蛋白,和其他人-可能通过一系列机制确定过敏反应。所有销售的牛奶和奶制品都经过了包括加热的工业加工,过滤,和脱脂。牛奶加工导致免疫调节蛋白的结构变化,导致基质中亲脂性化合物的损失,因此,工业加工的奶制品具有更高的致敏性。因此,原料农场奶的致耐受性能力,与乳清蛋白α-乳白蛋白和β-乳球蛋白及其亲脂性配体相关,丢失了。
    未经证实:牛奶过敏(CMA)的免疫致病机制范围很广。未处理,新鲜牛奶,比如人类的母乳,含有各种因工业加工而受损的致耐受性因子。关注牛奶加工的免疫学后果的进一步研究有必要在分子基础上了解加工过程使单一牛奶化合物成为过敏原的程度。
    UNASSIGNED: The immunopathogenesis of cow\'s milk protein allergy (CMPA) is based on different mechanisms related to immune recognition of protein epitopes, which are affected by industrial processing.
    UNASSIGNED: The purpose of this WAO DRACMA paper is to: (i) give a comprehensive overview of milk protein allergens, (ii) to review their immunogenicity and allergenicity in the context of industrial processing, and (iii) to review the milk-related immune mechanisms triggering IgE-mediated immediate type hypersensitivity reactions, mixed reactions and non-IgE mediated hypersensitivities.
    UNASSIGNED: The main cow\'s milk allergens - α-lactalbumin, β-lactoglobulin, serum albumin, caseins, bovine serum albumins, and others - may determine allergic reactions through a range of mechanisms. All marketed milk and milk products have undergone industrial processing that involves heating, filtration, and defatting. Milk processing results in structural changes of immunomodulatory proteins, leads to a loss of lipophilic compounds in the matrix, and hence to a higher allergenicity of industrially processed milk products. Thereby, the tolerogenic capacity of raw farm milk, associated with the whey proteins α-lactalbumin and β-lactoglobulin and their lipophilic ligands, is lost.
    UNASSIGNED: The spectrum of immunopathogenic mechanisms underlying cow\'s milk allergy (CMA) is wide. Unprocessed, fresh cow\'s milk, like human breast milk, contains various tolerogenic factors that are impaired by industrial processing. Further studies focusing on the immunological consequences of milk processing are warranted to understand on a molecular basis to what extent processing procedures make single milk compounds into allergens.
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  • 文章类型: Journal Article
    如今,动力学模型是确保食品安全的基本工具。预测微生物学中使用的大多数模型都有模型参数,其精度对于提供有意义的预测至关重要。动力学参数通常根据实验数据进行估计,实验设计会对估计的精度产生很大影响。在这个意义上,最佳实验设计(OED)应用来自优化和信息理论的工具来识别一组约束下的信息最丰富的实验(例如数学模型,样品数量,etc).在这项工作中,我们开发了一种设计最佳等温失活实验的方法。我们考虑设计空间的两个维度(时间和温度),以及与温度相关的实验最大持续时间。其应用功能已包含在bioOEDR包中。我们确定了无论三个失活模型的采样点数量如何都保持最佳的设计模式(Bigelow,Mafart和Peleg)和三种模式微生物(大肠杆菌,Senftenberg沙门氏菌和凝结芽孢杆菌)。在极端温度和接近实验的最大持续时间的样品是最有益的。此外,由于幸存者曲线的非线性,Mafart和Peleg模型在中间时间点需要一些样本。还分析了参考温度对参数估计精度的影响。根据数值模拟,我们建议将其固定为实验所用的最高和最低温度的平均值。本文最后讨论了等温失活实验设计的指南。他们将基于信息论的这些最佳结果与与等温失活实验有关的几个实际限制相结合。这些指南的应用将减少表征热失活所需的实验负担。
    Kinetic models are nowadays a basic tool to ensure food safety. Most models used in predictive microbiology have model parameters, whose precision is crucial to provide meaningful predictions. Kinetic parameters are usually estimated based on experimental data, where the experimental design can have a great impact on the precision of the estimates. In this sense, Optimal Experiment Design (OED) applies tools from optimization and information theory to identify the most informative experiment under a set of constrains (e.g. mathematical model, number of samples, etc). In this work, we develop a methodology for the design of optimal isothermal inactivation experiments. We consider the two dimensions of the design space (time and temperature), as well as a temperature-dependent maximum duration of the experiment. Functions for its application have been included in the bioOED R package. We identify design patterns that remain optimum regardless of the number of sampling points for three inactivation models (Bigelow, Mafart and Peleg) and three model microorganisms (Escherichia coli, Salmonella Senftenberg and Bacillus coagulans). Samples at extreme temperatures and close to the maximum duration of the experiment are the most informative. Moreover, the Mafart and Peleg models require some samples at intermediate time points due to the non-linearity of the survivor curve. The impact of the reference temperature on the precision of the parameter estimates is also analysed. Based on numerical simulations we recommend fixing it to the mean of the maximum and minimum temperatures used for the experiments. The article ends with a discussion presenting guidelines for the design of isothermal inactivation experiments. They combine these optimum results based on information theory with several practical limitations related to isothermal inactivation experiments. The application of these guidelines would reduce the experimental burden required to characterize thermal inactivation.
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  • 文章类型: Journal Article
    为临床医生提供指导,荒野医学会召集专家,在无法确保可用水的可饮用性的情况下,制定基于证据的水消毒指南,包括荒野和国际旅行,受灾地区,和其他没有适当卫生设施的地区。该指南提出了减少或消除个体水微生物污染的可用方法,groups,或家庭;对其有效性的评估;以及实际考虑。证据评估包括实验室和临床出版物。小组根据支持证据的质量以及利益与风险或负担之间的平衡对建议进行分级,根据美国胸科医师学会公布的标准。
    To provide guidance to clinicians, the Wilderness Medical Society convened experts to develop evidence-based guidelines for water disinfection in situations where the potability of available water is not ensured, including wilderness and international travel, areas affected by disaster, and other areas without adequate sanitation. The guidelines present the available methods for reducing or eliminating microbiologic contamination of water for individuals, groups, or households; evaluation of their effectiveness; and practical considerations. The evidence evaluation includes both laboratory and clinical publications. The panel graded the recommendations based on the quality of supporting evidence and the balance between benefits and risks or burdens, according to the criteria published by the American College of Chest Physicians.
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  • 文章类型: Journal Article
    Objectives: To develop recommendations from the European Milk Bank Association (EMBA) for the establishment and operation of human milk banks (HMB) in Europe. Method: A working group comprising members of the EMBA was convened in 2015 to develop Europe-wide recommendations for milk banks. Each member had experience of guideline development and/or milk banking operations. An initial survey was agreed using collated published global recommendations. A total of 108 potential recommendations were included in the survey; responders noted which were included in their national guidelines. The responses were collated, compared, and discussed and the group determined where there was consensus and where substantial or minor differences were identified. Where there was consensus or robust published evidence on which to base recommendations these were included. When there was no consensus and no clear evidence base, a statement of explanation based on collective expert opinion was agreed. Results: Published, internationally available guidelines with recommendations for human milk banks from France, Italy, and the UK, together with guidelines from Austria, Denmark, Germany, Norway, Slovakia, Spain, Sweden, and Switzerland were included as source materials. These covered: General recommendations; Donor recruitment and screening; Expression, handling, and storage of donor human milk (DHM); Pooling of DHM; Milk screening; Milk treatment (pasteurization); Delivery of DHM to recipients. Conclusions: Evidence based recommendations and consensus statements from the EMBA will now be published on the EMBA website to assist in the safe establishment and operation of HMBs throughout Europe. These have also been used to inform the chapter on human milk to be included in the 2019 edition of the Guide to the quality and safety of tissues and cells for human application, published by the European Directorate for the Quality of Medicines & HealthCare (EDQM).
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    文章类型: Journal Article
    The present paper is an amendment to the recent Italian Guidelines of human milk banking published in 2010. Working Group on Guidelines (Panel) of the Italian Association of Human Milk Banks (AIBLUD) states, in accordance with the European Union Comission\'s Amending Directive of January 2011, that the hard plastic feeding bottles used in the collection, storage and pasteurization of the human milk should be Bisphenol A (BPA) free. Until new evidence are available polycarbonate feeding bottles should not be used for collection, storage and pasteurization of human milk. The paper summarizes the former and current European Commission Directives and shows the related amending changes to the 2010 Italian Human Milk Banking Guidelines.
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