沉淀碳酸钙（PCC）在铜版纸中的应用

本文介绍了沉淀碳酸钙在铜版纸生产中作为填料及涂布颜料的应用与特性，重点介绍了涂布级沉淀碳酸钙对铜版纸的光学性能、印刷性能等方面所带来的影响，并展望了沉淀碳酸钙在涂布加工纸中的应用前景。     

沉淀碳酸钙（PCC）在铜版纸中的应用

本文介绍了沉淀碳酸钙在铜版纸生产中作为填料及涂布颜料的应用与特征，重点介绍了涂布纸沉淀碳酸钙对铜版纸的光学性能，印刷性能等方面所带来的影响，并展望了沉淀碳酸钙在涂布加工纸中的应用前景。     

造纸文摘

纸张涂布用片状沉淀碳酸钙的研制［刊］/袁伟…/精细化工.1998，15（2）.26～29采用合适的添加剂，可以得到片状沉淀碳酸钙，它满足纸张涂布颜料的三个基本要求，即小于2um粒子的质量分数大于90％，白度大于90％，粘浓度大于70％。涂布试验表明，片状沉淀碳酸钙能大量替代价昂的进口高岭土。磷酸酯淀粉的研制［刊］/石荣莹…/上海造纸.1998，29（1）.6～10，24利用半干法研究制备磷酸酯淀粉，并通过一系列正交实验，确定了最佳的工艺参数和路线，制得了性能良好的产品。涂布箱板纸的涂料性质对涂层掉粉、掉毛和印刷油墨吸收性的影响［刊］/…     

沉淀碳酸钙在铜版纸中的应用

介绍了沉淀碳酸钙（PCC）在铜版纸生产中作为填料及涂布颜料的应用与特性，重点介绍了涂布级PCC对铜版纸光学性能、印刷性能等方面所带来的影响，并展望了其在涂布加工纸中的应用前景。与研磨碳酸钙（GCC）相比，涂布级PCC能全面改善纸张的光学性能如白度、光泽度、不透明度等，并提高纸面的平滑性能，同时其高松厚的涂层结构及高的孔隙率所带来的快速吸收性能，将对其的最终使用产生重大影响。     

美国特种矿公司将在浙江建轻钙卫星工厂

美国特种矿公司日前宣布已与浙江正大纸业集团有限公司签订了建立年产5万t涂布级沉淀碳酸钙（轻钙）卫星工厂的合作协议，为浙江的包装纸生产提供涂布级轻钙。该工厂将于2015年第四季度开始运行。     

纸张填加沉淀碳酸钙的试验

沉淀碳酸钙加填于纸浆中能较好地提高成纸的不透明度，在偏三角形（S－PCC）、棱柱形（P－PCC）和斜方形（R－PCC）三种不同类型的沉淀碳酸钙中，斜方形沉淀碳酸钙（R－PCC）作为纸张填料具有更高不透明度，用量为20％的手抄纸片，不透明度高达92．5％．     

沉淀碳酸钙在涂布白纸板涂料上的应用研究

本文对沉淀碳酸钙（PCC）的应用机理进行了讨论，并从应用的角度研究PCC作为涂布颜料对涂布纸板性能指标的影响。实践证明，合理应用PCC优良的特性可以改善涂布纸板的印刷适应性，也显示出PCC在纸板涂布颜料中越来越重要的地位。     

矿物科技公司将在广西南宁建PCC生产车间

矿物科技公司日前宣布．该公司与南宁劲达兴纸业有限公司签署合资协议。根据协议，该公司将在我国广西壮族自治区劲达兴纸业的造纸厂建立45000t的卫星沉淀碳酸钙车间。劲达兴纸业这家私营造纸企业，是办公用纸市场新秀，生产未涂布赠阅报纸。该卫星设施将在2014年第四季度投入运营。它所生产的PCC将用作劲达兴纸业的填料。     

抗水剂对涂料保水性及涂布白卡纸湿强度的影响

在白卡纸涂料中加入三聚氯胺甲醛树脂抗水剂，白卡纸涂层表面将形成胶粘剂（胶乳）网状结构，可改善涂布白卡纸纸面的干、湿强度。在驻甲基纤维素（CMC）胶乳体系的高固含量涂料中，抗水剂是除CMC外对涂料装液保水性能影响较大的因素之一。1试验1．1配方本试验使用CMC胶乳体系面料配方，基本组成为：”且瓷土80％，”1碳酸钙20％，CMCO．8％（相对于颜料总量，下同），胶乳15％，抗水剂0．4％～0．SN。控制指标为：粘度800～1000mPa·s（100r／min，25C），PH值8．5～9．0，固含量60土1％。1．2涂布与整饰用人工计量捧在白卡原纸上…     

纸张填加沉淀碳酸钙的试验

沉淀碳酸钙加填于纸浆中能较好地提高成纸的不透明度，在偏三角形（Ｓ－ＰＣＣ），棱柱形（Ｐ－ＰＣＣ）和斜方形（Ｒ－ＰＣＣ）三种不同类型的沉淀碳酸钙中，斜方形沉淀碳酸钙（Ｒ－ＰＣＣ）作为纸张填料具有更高不透明度，用量为２０％的手抄纸片，不表明度高达９２．５％。     

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