白腐菌处理漂白废水的研究

经驯化后的白腐菌处理苇浆ＣＥＨ漂白废水比未驯化菌的处理效果好，在最适培养条件（加０．１％葡萄糖，０．０２％酒石酸铵，０．０５％ＨＡｃ－ＮａＡｃ，ｐＨ值４．３－４．５，３２℃－４２℃，培养五天）下间歇式连续处理，处理效果较稳定，ＣＯＤｃｒ去除率４９．１－５５．９％，ＴＯＣＩ去除率４３．７％－４９．０％，脱色率为６３．１－６７．９％。     

玉米粉丝耐煮剂的研究

本试验采用三因素二次回归正交试验，确定了食盐、明矾、ＣＭＣ－Ｎａ作为玉米粉丝耐煮剂成分的最佳配比。对不同取代度的淀粉磷酸酯在粉丝生产中进行了应用研究，结果表明，取代度为０．６９０的淀粉磷酸酯效果最佳，且用量不超过４％。经综合试验，确定了玉米粉丝耐煮剂的组成为食盐、明矾、ＣＭＣ－Ｎａ和淀粉磷酸酯，其最佳配比（按１００ｇ干淀粉计）为食盐０．５００ｇ、明矾０．５０９ｇ、ＣＭＣ－Ｎａ０．２０３ｇ和淀粉磷酸酯３．０００ｇ。     

咸味型八宝粥罐头加工及稳定性研究

本研究以糯米、麦片、火腿肉、赤豆、花生仁、核桃仁、红枣、枸杞为原料，运用正交试验优选出入宝粥四种主要原料的最佳百分配比为糯米：麦片：赤豆：火腿肉：３．０％：２．５％：１．０％：３．０％。稳定性研究表明，琼脂－ＣＭＣ－Ａ复事百分配比为０．１％－０．１５％－０．１％对咸味型八宝粥稳定效果最好；合理的蒸煮杀菌公式为５′－５５′－５′／１２１．２℃。     

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…     

芝麻饼（渣）蛋白硒性质及提取条件的研究

本文研究了芝麻饼（渣）中含硒量、生物效能、生物效能、溶解性、分布及存在形式等性质 。用Ｄ型大柱凝胶电泳分析其可溶性蛋白硒络合分子量范围为２１ＫＤ－３０ＫＤ。提取条件效应综合预测数学模型为：Ｙ１＝０．４６４７Ａ＋１０．０６３７Ｃ＋３６．８１４５Ｄ＋０．１５６７Ｅ－３２．７８４８，＆２＝０．００６８Ａ＋０．００２５Ｂ－０．４２５０Ｄ＋）．１６７０。     

稻米中普鲁兰酶的纯化与性质的研究

稻米的普鲁兰酶（ＰｕｌｌｕｌａｎａｓｅＥ．Ｃ．３．２．１．４１）用ＤＥＡＥ－纤维素吸附，ＳｅｐｈａｄｅｘＧ－１００凝胶过滤，聚丙烯酰胺盘状凝胶电泳纯化，得到了聚丙烯酰胺凝胶电泳均一的纯酶。纯酶作用的最适温度为５０℃，最适ｐＨ为５．５。以普鲁兰（Ｐｕｌｌｕｌａｎ）为底物酶的米氏常数Ｋｍ为０．０１２５％，以支链淀粉为底物，酶的米氏常数Ｋｍ为２．５％，用ＳｅｐｈａｄｅｘＧ－１００凝胶层析法测得酶的分子量为７００００。     

四川名茶矿质元素含量研究

分析了四川名茶矿质元素含量及特点。在所分析的１８种元素中，四川名茶Ｋ，Ｐ，Ｓ，Ｃａ，Ｍｇ元素含量较高（＞１５００ １０＾－６），Ｂａ，Ｃｒ，Ｖ，Ｃｏ，Ｓｅ含量较低（＜１０ １０＾－６）；与普通绿茶相比，四川名茶含有较高的Ｋ，Ｚｎ，Ｐ，Ｎａ，Ｎｉ，Ｃｕ，Ｓ，Ｓｅ，Ｃｏ元素，其高幅为０．３８％－１１５．６５％，而Ｍｇ，Ｍｎ，Ａｌ，Ｃａ，Ｂａ，Ｖ，Ｒｂ，Ｆｅ，Ｃｒ元素则为７．３２％－４６．６７％；红岩迎     

玉米提取脂多糖的研究

采用监测ＫＤＯ（２－ｋｅｔｏ－３－ｄｅｏｘｙｏｃｔｏｎａｔｅ）的方法，对玉米提取脂多糖的工艺进行了优化；用２．５ｋｇ玉米提得到０．４３０ｇ，粗脂多糖，经测定含ＫＤＯ０．２５ｇ总糖含量８３．７％，核酸及蛋白质污染〈１２％。     

湿部添加剂对AKD的留着率及反应效果的影响

众所周知，沉淀碳酸钙（ＰＣＣ）和湿部阳离子淀粉的用量影响ＡＫＤ的施胶效果。增加湿部阳离子淀粉用量一般会提高 ＡＫＤ的施胶效果。而增加 ＰＣＣ用量或表面积将会降低其施胶效果。 进行了两项基础研究以便更好地理解ＰＣＣ和湿部阳离子淀粉对ＡＫＤ施胶和反应效果的影响。第一项研究是在Ｗｅｓｔｅｒｎ Ｍｉｃｈｉｇａｎ大学的中试纸机上评价了ＰＣＣ和ＡＫＤ添加点对施胶效果的影响。第二项研究是在实验室进行的，在高剪切条件下测定了ＰＣＣ和湿部阳离子淀粉对ＡＫＤ的首程留着率和反应效果的影响。１ＰＣＣ、ＡＫＤ添加点的研究 用…     

白腐菌处理漂白废水的研究

经驯化后的白腐菌处理苇浆ＣＥＨ漂白废水比未驯化菌的处理效果好，在最适培养条件（加０．１％葡萄糖，０．０２％酒石酸铵，０．０５％ＨＡｃ─ＮａＡｃ，ｐＨ值４．３─４．５，３２℃─４２℃，培养五天）下进行间歇式连续处理，处理效果较稳定，ＣＯＤｃｒ去除率４９．１─５５．９％，ＴＯＣｌ去除率４３．７％─４９．０％，脱色率为６３．１─６７．９％。     

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