飞机应急放性能仿真分析

文章根据适航条款对起落架应急放功能的要求,研究了起落架应急放机理,分析了起落架运动过程中载荷变化,建立了某机型民用飞机舱门联动式前起落架动力学仿真模型,模拟仿真起落架应急放过程,从起落架支柱合力矩曲线判别起落架应急放功能是否失效。推算不同飞行速度对应急放功能的影响,为制定起落架应急放操作速度要求提供依据。     

应急管理系统优化提升若干问题分析

文章以中国石油应急管理系统在近几年上线实施及用户使用过程中所遇到的各类问题为研究对象,经过研究分析得出应急管理系统优化提升可从两方面来着手进行:一是应急管理系统数据规范性及准确性;二是应急管理系统相关功能使用便利性。     

应急救援类防护服装发展现状与趋势

为提升应急救援类防护服装的功能及舒适性能和优化设计提供基础数据和科学依据,从应急救援防护服的面料选择、服装结构设计以及主要测试方法3个方面,阐述了应急救援类防护服装的发展现状。归纳总结出应急救援防护服装设计的基本流程为确定应用需求、明确重点防护对象、设计初始方案、初始设计方案评价及确定最佳方案。指出目前应急救援防护服的研究瓶颈是功能兼顾困难、标准建立复杂以及舒适性评价精度控制难,预测了应急救援防护服在差别化高性能纤维、多功能智能化防护系统、更高的穿着舒适度以及健全规范的测试评价系统方面的发展趋势。     

云计算应用环境下的信息安全应急系统研究

如今互联网+时代发展,智慧城市建设不断推进,信息的安全应急管理成为人们关注和解决的重要问题。文章在云计算环境下,对信息安全应急系统的建设以及模块功能进行分析,通过云计算强大处理数据的能力,为信息安全系统的构建与发展提供技术支持。     

IT系统服务器自动化控制平台的设计

本文介绍了大型企业IT系统运维管理的背景和难点,提出了IT系统服务器自动化控制平台的功能架构,从服务器管理自动化、日常作业任务智能化、应急切换策略流程化、应急切换操作平台化这4个方面着手描述了平台的功能点,使企业IT部门借助平台强化运维作业管理和应急切换管理的能力,满足业务连续性要求。     

GMC-96B型钢轨打磨列车减速箱脱齿故障应急处置装置

文章主要介绍了GMC-96_B型钢轨打磨列车减速箱脱齿故障,以及应急处置装置结构、功能及使用方法,对于具有类似结构的大型养路机械传动系统故障应急处置具有指导意义。     

我国食品安全突发事件应急保障重点研究领域建议

围绕应急机制、应急快检、应急演练、应急决策、应急处置、应急供应等领域,基于“食品安全突发事件及重大事件应急演练及应急决策保障系统研究”国家重点研发计划项目工作的思考,在对国内外食品安全监管应急技术发展现状进行综合分析的基础上,结合我国实际,对食品安全突发事件应急保障重点研究领域提出研究建议。     

浅析核电站附属/辅助厂房非放射性通风系统的运行、调试

介绍了三代核电厂的附属辅助厂房非放射性通风系统的设备布置与功能,总结了该系统的常规和应急响应的运行方式,以及调试过程中遇到的问题,分析了产生的原因。     

中美食品安全应急管理体系对比分析

从应急管理体系的建设与完善、食品安全应急管理体系部门设置、应急管理体系运行机制等角度对中国和美国的食品安全应急管理体系进行了对比分析,并提出了完善我国食品安全突发事件应急管理体系的三点建议。     

SB/T11059—2013《肉类蔬菜流通追溯体系城市管理平台规范》的主要内容(2)

正1.5应急事件快速处理在应急事件发生时,通过平台汇总的追溯信息迅速锁定事件的上下游环节和责任人,及时发布警示信息,支持有关部门依法开展应急处置工作。包括应急事件识别与展示、应急事件报告、跨城市应急事件处置。1.6追溯信息综合分析主要包括各环节市场运行情况分析和城市整体市场运行情况分析。各环节市场运行情况分析是对屠宰环节、批发环节、零售环节和团体消费环节的统计分析。城     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Chlorohydrins of bisphenol A diglycidyl ether (BADGE) and of bisphenol F diglycidyl ether (BFDGE) in canned foods and ready-to-drink coffees from the Japanese market

BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H₂O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.     

European priorities for research to support legislation in the area of food contact materials and articles

A strong science base is required to underpin the planning and decision-making process involved in determining future European community legislation on materials and articles in contact with food. Significant progress has been made in the past 5 years in European funded work in this area, with many developments contributing to a much better understanding of the migration process, and better and simpler approaches to food control. In this paper this progress is reviewed against previously identified work-areas (identified in 1994) and conclusions are reached about future requirements for R&D to support legislation on food contact materials and articles over the next 5 or so years.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the