姜汁保健豆腐的研制

以姜和大豆为原料研制姜汁保健豆腐,得出最佳工艺参数:豆乳浓度1∶5,GDL添加量0.25%,豆乳姜汁比6∶1.5。该产品呈淡黄色,具有豆香味和一定的姜香,是一种保健型的内酯豆腐。     

芦荟豆腐保健食品的研究

以芦荟和大豆为原料研制了营养保健豆腐,其制作最佳工艺参数为大豆：豆浆为1：5,豆乳芦荟比75：25.产品呈绿色,营养丰富,发展前景广阔.     

芦荟全叶汁酸豆奶饮料的研制

以大豆、芦荟为主要原料,采用正交试验设计等方法,依据感官评价探讨芦荟全叶汁酸豆奶饮料的最佳配方和工艺。结果表明,芦荟全叶汁酸豆奶饮料的最佳配方为：豆乳∶芦荟全叶汁=8.5∶1.5、蔗糖7%、全脂奶粉1%、复合酸0.18%（配比为柠檬酸∶乳酸∶苹果酸=3∶2∶1）,复合稳定剂0.51%（比例为耐酸CMC0.06%、PGA0.30%、单甘酯0.15%）。最佳工艺：通过滴加方式调酸,采用70℃,20MPa条件均质,装瓶前后二次杀菌的方式可制得风味优良、质地均一的营养健康饮料。     

芦荟营养保健豆奶的工艺研究

以大豆、芦荟为主要原料,采用正交试验确定了产品的配 方和加工工艺,最佳工艺参数为:豆乳10mL、芦荟汁 0.1mL、白砂糖8％,121℃杀菌15min。该产品呈乳白色,具 纯正豆香味和芦荟特有香味,并具有营养、保健和美容作 用,发展前景十分广阔。     

天然复合蔬菜汁豆腐的研制

探讨了以番茄汁、黄瓜汁和大豆为原料研制天然、营养的保健豆腐,其制作最佳工艺参数为豆乳浓度１∶８,豆乳、番茄汁比２００∶２６,豆乳、黄瓜汁比２００∶６０,点浆温度８０℃。该产品呈淡绿色,具有黄瓜的清香味和纯正的豆香味,营养更丰富,膳食结构更合理,符合现代食品发展趋势,具有广阔的市场前景     

薏米保健豆腐的研制

以薏米、大豆为主要原料,研制出的薏米保健豆腐,其最佳工艺参数为:豆乳浓度1∶4、GDL添加量0.25%、豆乳薏米液比8∶1.2。该产品成淡黄色,具有豆香及薏米特有的香气,是一种保健型内酯豆腐。     

山药保健豆腐的研制

以大豆、山药为主要原料,利用葡萄糖酸-δ-内酯为凝固剂,研制出了山药保健豆腐。其制作最佳工艺参数为:豆乳浓度1∶5,豆乳山药泥比10∶3,葡萄糖酸-δ-内酯添加量0.27%。该产品呈白色,具有纯正的豆香味及山药的特有风味,营养丰富,是一种很有发展前途的产品。     

芦荟营养保健口香糖的研制

以芦荟全汁及少量玉米醇溶蛋白为原料制成营养保健芦荟口香糖。应用正交实验的方法,对结果进行极差和方差分析。实验结果表明,用芦荟全汁20%;玉米醇溶蛋白5%;糖酸比100∶1;保湿剂3.0%;胶基25%,所制得的芦荟口香糖适口性最好。     

芦荟嗜酸乳杆菌酸乳的研制

以嗜酸乳杆菌和嗜热链球菌为发酵剂菌种 ,通过预先筛选和进一步的正交试验确定了芦荟嗜酸乳杆菌保健酸乳的最佳配方和工艺条件 :芦荟全叶汁和 1 1 %的脱脂复原乳以体积比 1∶9混合作为原料 ,添加原料量 8%的蔗糖、1 %的麦芽糖、接种量 2 %,菌种比为 1∶2或 1∶1 ,培养温度42℃。     

白茶发酵豆乳的研制

以白茶和大豆为主要原料,利用乳酸菌发酵剂进行发酵,通过单因素和正交试验得出白茶发酵豆乳的最佳生产工艺和配方。结果表明,以50℃、30min的条件下,白茶∶水为1∶55时,浸提白茶效果最佳。白茶发酵豆乳的最佳配方是蔗糖添加量为6%;奶粉添加量为10%;豆浆∶白茶浸提液为8∶2;发酵剂接种量为3%,发酵时间为6h;海藻酸钠的添加量为0.03%。     

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