红麻化学热磨机械浆用于生产挂面纸板

本文研究了用全秆红麻生产ＣＴＭＰ，用高得率红麻ＣＴＭＰ代替硫酸盐针叶木浆生产挂面纸板。全红麻ＣＴＭＰ挂面纸板，不及１００％火炬松硫酸盐浆的挂面纸板性能好。在火炬松硫酸盐浆中加入３０～５０％的红麻ＣＴＭＰ，可生产出强度合格的挂面纸板。实验结果表明，加入红麻ＣＴＭＰ能提高纸板的压缩强度这一主要指标。     

利用蓝桉进行CTMP制浆造纸工业性试验

蓝桉ＣＴＭＰ制浆造纸工业性试验表明，浆得率可达８２．２６％，箱约板中掺配２１．５％蓝桉ＣＴＭＰ浆，出口牛皮纸中掺配１０％蓝要ＣＴＭＰ浆其各项物理指标均全部达以和超过了相应的标准规定，蓝桉ＣＴＭＰ浆用于纸和纸板的生产，不但开发利用了新的造纸资源，而且在一定程度上减轻环境污染。     

日产150吨BCTMP浆系统的试车实践

龙岩市造纸实业公司制浆车间生产１５０吨ＢＣＴＭＰ浆系统，是从加拿大引进的先进设备；于今年５月投料试生产出ＢＣＴＭＰ浆。本文主要简述了该系统的设备运行情况及工艺技术问题。     

机械浆制造的新方向──锥形圆盘磨浆机

机械浆制造的新方向──锥形圆盘磨浆机一、前言七十年代前期，机械浆大半是用磨石磨本法生产的，以后采用木片磨浆，于是新的磨浆法迅速发展，到１９９０年，总产量３８００万吨的６５％被ＲＭＰ、ＴＭＰ、ＣＴＭＰ占领了。圆盘磨浆机的设备能力在１９８８年达到了２７０...     

CTMP生产过程中的几种主要设备

ＣＴＭＰ生产过程中的几种主要设备戴云（吉林造纸厂）我厂从瑞典引进一套日产１５０吨的ＴＭＰ生产线，使用针叶材白松生产ＴＭＰ。但因我国针叶材短缺，这套装置的能力得不到发挥，因此将这套生产线改造成为ＣＴＭＰ生产线。改造中主要增加了预混装置以及磨浆后对纸浆进...     

高唐纸业集团3800mm铜板纸生产线介绍

高唐纸业集团于１９９８年引进一台奥地利二手纸机,主要生产１２８－２５０９／ｍ２的高档铜版纸,年产７万吨。该机自动化程度高,配有４道涂布,是目前我国先进的机内涂布造纸机。１生产工艺流程２生产工艺２.１原料配比 针叶木浆：３０％－３５％;阔叶木浆：２０％－４０％ＢＣＴＭＰ浆：５％－１０％;损纸：１５％－４０％２.２打浆工艺２．３辅料加添 ＡＫＤ：０．１４％（对绝干浆）;淀粉：１．５％－２．０％ｍ２ＣａＣＯ３： １５％－２０％;增白剂：０．１５％－０．２０％;品监：品紫为１：１;其它助剂：略。２．４涂料配…     

马尾松BCTMP生产实践初探

本文介绍广州造纸有限公司采用中国南方马尾松材为原料生产新闻纸级用浆ＢＣＴＭＰ的情况，制浆所用的主要设备是从加拿大ＫｖａｅｒｎｅｒＨｙｍａｃ公司引进的，生产能力为日产１５０吨。     

乌梅果茶稳定技术的研究

本文系统地研究了乌梅果茶的生产工艺和稳定技术，结果表明：乌梅果茶的最桂稳定剂为羡甲基纤维素钠０．１％和琼脂０．０６％～０．１％；均质压力１８～３０ＭＰａ、均质温度３０～６０℃和均质一次是乌梅果茶的最佳均质条件；乌梅果肉浆（水分９４．０％）１０％，胡萝卜浆（水分９４．０％）５％和滋味改良剂０．１３％，按此生产出来的乌梅果茶，涩味明显减弱。     

淀粉接枝聚丙烯酰胺在无碳复写原纸中的增强试验

进行了淀粉接枝聚丙烯酰胺（ＰＳＭ）应用于无碳复写原纸抄造的增强试验。试验结果表明，ＰＳＭ与浆料的均匀混合对其增强效果影响较大；当ＰＳＭ用量为２．０％，原纸裂断长最大可提高３０．３％，而耐破度也可提高１１．４％以上，因此增强效果好，尤其用短纤维部分代替长纤维（长纤维配比可降低１０％）后用ＰＳＭ来增强效果明显。     

淀粉接枝聚丙烯酰胺在无碳复写原纸中的增强试验

进行了淀粉接枝聚丙烯酰胺（ＰＳＭ）应用于无碳复写原纸抄造的增强试验。试验结果表明，ＰＳＭ与浆料的均匀混合对其增强效果影响较大；当ＰＳＭ用量为２．０％，原纸裂断长最大可提高３０．３％，而耐破度也可提高１１．４％以上，因此增强效果好，尤其用短纤维部分代替长纤维（长纤维配比可降低１０％）后用ＰＳＭ来增强效果明显     

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