无水乙醇制备方法的研究进展

介绍了共沸精馏法、萃取精馏法、膜分离法和吸附法制备无水乙醇的方法及其研究进展,并评价了各种制备方法的优缺点,阐述了燃料酒精在国内外发展进程,分析了燃料酒精快速发展的原因,介绍了目前燃料酒精生产中需要解决的问题及对策。     

生物素测定方法的分析

生物素是一种B族维生素。近几年，生物素受到的广泛的关注，与此同时，生物素测定方法的研究也取得了迅速的发展。本文介绍了近年来生物素测定常用的几种方法，例如微生物法、高压液相色谱法、生物传感器法、毛细管电泳法、荧光法、ELISA法、微分脉冲伏安法，并简单介绍了生物素分析的研究现状与进展。     

制浆造纸废水处理技术

主要从化学法、物化法、物理法和生化法4大废水处理方法出发，着重介绍了制浆造纸工业一些比较先进或较新的废水处理方法。并列举了多种方法配合使用的处理效果。     

现代物理化学方法在油脂质量控制中的应用

介绍了现代物理化学方法(差示扫描量热法、电子显微镜、核磁共振法、X-射线衍射法)的原理及其在油脂质量控制中的应用,并预测了油脂质量控制研究的发展方向。     

水热合成法制备高纯度氧化镁

用水热合成法制备了高纯度氧化镁，实验发现，这种方法是一种分离镁和钙的非常有效的方法，与气相氧化法、液相滴下法、Ｓulman法、Ａman法相比，本方法简单、产品质量稳定，氧化镁含量可达９９．９５％－９９．９８％，。适应于工业化生产。     

木棉纤维的几种鉴别方法

综述了木棉纤维的研究现状,主要从燃烧法、显微镜法、溶解法和定量化学分析法几个方面简要介绍了木棉纤维鉴别方法的研究方法,为木棉纤维的鉴别提供了参考。     

菜籽饼粕脱毒方法研究进展

对当前菜籽饼粕的脱毒方法进行了归纳总结.菜籽饼粕脱毒方法主要分为物理脱毒法、化学脱毒法、微生物脱毒法和遗传育种法4大类.想要高效利用菜籽饼粕,必须综合考虑其抗营养因子并加以脱除.     

大麦发芽势、发芽率实验检测方法的研究

研究主要探讨了大麦发芽实验检测方法的研究。经过砂床法、纸床法、染色法三种方法的实验对比,确定了砂床法和染色法这两种实验方法的检测结果达到一致,而纸床法在实验结果比其前面两种方法结果偏低。通过本次实验来看,确定了用于大麦发芽检测方法将采取砂床法和染色法。而其中染色法实验时间为十分钟,该方法完全可以替代传统大麦发芽率检测所用的周期为七天的砂床法,提高了生产效率。该方法简便、准确、可靠满足测定原粮大麦发芽率的要求。     

三种甲醛定量分析方法的比较研究

比较了国内外测量室内空气中甲醛常用的3种分光光度分析方法:乙酰丙酮法、酚试剂法、变色酸法,通过3种方法的标准曲线和R2比较每种方法的线性和灵敏度,并通过精密度实验对3种方法的重复性进行了比较。     

三种甲醛定量分析方法的比较研究

比较了国内外测量室内空气中甲醛常用的3种分光光度分析方法：乙酰丙酮法、酚试剂法、变色酸法,通过3种方法的标准曲线和R2比较每种方法的线性和灵敏度,并通过精密度实验对3种方法的重复性进行了比较。     

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