NaCl-Na_2SO_4-H_2O体系（MVR）与（ME）盐硝联产工艺生产分析

热压制盐（MVR）和多效真空制盐（ME）是两种主要的制盐工艺方法。文章就NaCl-Na2SO4-H2O卤水现有（MVR）与（ME）盐硝联产工艺进行生产分析,指出MVR和ME的各自优点及局限性,供同行参考。     

MVR和ME技术在中盐金坛生产运行中的能耗比较

MVR和ME代表着制盐行业的两大最先进技术,在中盐金坛公司,这两种制盐技术分别被用于一期、二期工程。我们统计了实际生产中这两项技术各自的电耗、汽耗等主要能耗,并根据蒸汽、电折标煤的换算值折算成标煤做了比较。     

ME与MVR制盐工艺比较及兼容结合的设想

本文对ME和MVR制盐工艺进行了简要的分析和运行比较,得出了ME与MVR是各有所长,无法相互取代的两种先进制盐工艺模式的结论。并提出了一种ME+MVR取长补短,兼容并存,创新结合的制盐工艺模式的设想。     

浅谈MVR的压缩机配置

本文简述ME和MVR的异同及压缩机配置与蒸发用汽的平衡措施,并以金坛二期工程中的MVR部分有关技术数据介绍汽平衡实例。     

机械蒸汽再压缩（MVR）技术在淡盐水浓缩中的应用

介绍了机械蒸汽再压缩（MVR）工艺的工作原理,并与多效蒸发工艺进行技术比较,结合公司MVR装置的实际运行情况,对MVR工艺的技术特点及经济优势作了简单分析。     

浅谈对ME和MVR盐硝联产引进技术的认识

以金坛引进工程的有关工艺数据,阐述MVR与ME技术的异同及一些相关问题,供业内同行消化吸收及操作调控参考。     

多效改MVR制盐技术在四川久大舒平“煤改电”中应用浅谈

本文介绍了多效真空蒸发制盐改造为MVR蒸发制盐在四川久大制盐有限责任公司舒坪基地60万吨/年制盐装置MVR“煤改电”技改项目成功运用情况，同时全面对卤水成分、多效改造成MVR工艺、预热系统、蒸汽洗涤压缩等技术以及生产运行情况进行了介绍。     

MVR在板式蒸发装置中的应用

叙述了MVR系统在板式蒸发装置中应用的可行性,提出了MVR蒸发器顺流、并流、多级压缩等工艺方案,此文对MVR蒸发器设计有一定的参考意义。     

海水赶制饱和卤水利用MVR蒸发技术可行性探讨

目前,国内海水制盐方法多采用滩田法、多效蒸发工艺,文章主要研究饱和卤水的析盐规律,在析盐阶段饱和卤水主要是氯化钠和硫酸钙相伴析出,其他盐类只是富集并不析出,根据这一特性,探索性地浅析利用MVR技术对饱和卤水进行蒸发析盐的可行性。     

国产机械压缩式热泵(MVR)在药用盐生产中的运用

文章对国产化机械压缩式热泵(MVR)在原料药—药用氯化钠蒸发工序生产中的设计运行情况进行简要介绍,并就药用氯化钠企业生产技术现状,多效真空蒸发存在的问题,机械压缩式热泵(MVR)技术现状及技术优点,国产机械压缩式热泵(MVR)的工艺设备配置、设备方案、运行情况进行分析介绍.     

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.     

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     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press