姜油树脂微胶囊化的研究

以生姜为原料、经超临界ＣＯ２萃取而得的姜油树脂为心材,以β－环状糊精为壁材,经乳化、均质、干燥制成姜油树脂微胶囊,着重研究了姜油树脂微胶囊化的工艺因素。     

β-环糊精包埋黑胡椒油树脂工艺研究

采用β-环糊精通过饱和水溶液法制备黑胡椒油树脂,对芯壁质量比、β-环糊精浓度、包埋温度以及包埋时间对包埋产率、包埋效率及所得微胶囊色差的影响进行研究,并将最适条件下制备的黑胡椒油树脂微胶囊添加至香肠中进行感官评定.结果表明,β-环糊精包埋黑胡椒油树脂的最佳工艺参数为芯壁质量比1:10、β-环糊精浓度15％、包埋温度55...     

杜仲翅果籽油微胶囊化及抗氧化性能研究

以β-环糊精作为微胶囊化壁材，用包络法对杜仲翅果籽油进行微胶囊化处理。采用均匀设计试验考察了微胶囊化的工艺条件，并对杜仲翅果籽油及其微胶囊化产物的抗氧化性能进行了探讨。研究结果表明：在β-环糊精用量3．0g、杜仲翅果籽油2．5ml、包络反应时间60min、包络反应温度30℃的条件下进行微胶囊化，产品收率可达83．6％，微胶囊化产物平均包络比为1．88：1，经β-环糊精微胶囊化处理后，杜仲翅果籽油具有较好的抗氧化性能。     

牡丹籽油微胶囊的制备及特性研究

研究以阿拉伯胶和β-环糊精为壁材,牡丹籽油为芯材,采用喷雾干燥法制备牡丹籽油微胶囊,并对其制备工艺及特性进行研究。结果表明:牡丹籽油微胶囊的最佳制备工艺条件为复合壁材阿拉伯胶与β-环糊精质量比1∶2、芯材与壁材质量比1∶2、乳化液总固形物含量20%;在最佳制备工艺条件下制得的牡丹籽油微胶囊产品颗粒圆整、大小分布均匀、囊壁表面平整光滑,包埋率可达86.32%;牡丹籽油微胶囊在常规的热加工处理过程中结构仍然完整,具有良好的热稳定性;牡丹籽油微胶囊化对牡丹籽油的主要功能成分α-亚麻酸的含量基本没有影响。     

喷雾干燥法制备生姜微胶囊的研究

以生姜为原料,经乙醇提取而得的姜油树脂为心材,以阿拉伯胶和麦芽糊精为壁材,用喷雾干燥法来制取姜油树脂微胶囊。通过正交试验分析,以油树脂包埋率为指标,确定了生姜喷雾干燥法微胶囊化的最佳工艺条件:心材与壁材比为1∶5、进风温度190℃、阿拉伯胶与麦芽糊精比为1∶7。     

元宝枫油脂微胶囊加工技术参数的研究

以大豆分离蛋白、β-环糊精为壁材,元宝枫籽油为芯材,单硬脂酸甘油酯为乳化剂,通过喷雾干燥法制备微胶囊化元宝枫籽油粉末油脂.在温度170℃的条件下,考察了壁芯比、复配壁材比例、壁材浓度对微胶囊化元宝枫籽油粉末油脂包埋率的影响,通过正交试验确定最佳工艺条件为壁芯比为4∶1(g/g)、β-环糊精与大豆分离蛋白的壁材配比为3∶...     

姜油树脂微胶囊稳定性及动力学特性的研究

以姜粉和姜油树脂为对照、姜辣素保存率为评价指标,通过实验考察了姜油树脂微胶囊（姜油树脂/β-环糊精包合物）在酸、碱、紫外线、高温、高湿影响下的稳定性,并进行了动力学特性（降解速率常数和半衰期）的初步研究。结果显示,pH1和pH11分别处理1d,微胶囊样品中姜辣素保存率分别为94.5%和70.3%。紫外光处理,微胶囊样品中姜辣素降解的速率常数为1.1463,半衰期为44.8d;110℃处理,姜辣素降解速率常数为2.50,半衰期为20.9d;高湿度（相对湿度92.5%）下,姜辣素降解速率常数3.12,半衰期为17.3d。与姜粉和姜油树脂相比,微胶囊对酸、碱、紫外线、高温、高湿等外界因素有着良好的稳定性。      

沙棘籽油微胶囊化的乳化工艺

以沙棘籽油为芯材(油相),以大豆分离蛋白及β-环糊精为水相,选取山嵛酸甘油酯作为乳化剂,探究了沙棘籽油微胶囊化的乳化工艺。以乳化液粒径大小作为指标,通过单因素试验探究了大豆分离蛋白与β-环糊精质量比、芯材添加量(即沙棘籽油添加量)、乳化剂添加量、总固形物含量对乳化液粒径的影响,通过响应面试验优化试验得出沙棘籽油微胶囊乳化液制备的最佳工艺条件。结果表明:大豆分离蛋白与β-环糊精质量比为1︰3,芯材添加量为43%,乳化剂添加量为1.8%,总固形物含量为10%,此时沙棘籽油微胶囊乳化液的粒径最小,体积平均直径D4, 3为0.722μm,所制备的乳化液粒径最小且较为均一。     

鹅油甘油二酯微胶囊化工艺研究

以鹅油甘油二酯为材料,探索鹅油甘油二酯微胶囊的制备工艺,以便减少鹅油甘油二酯氧化,延长产品的货架期。以酪蛋白酸钠和β-环糊精为壁材,鹅油甘油二酯为芯材,羧甲基纤维素钠为乳化剂,通过冷冻干燥法制备鹅油甘油二酯微胶囊;以包埋率为指标,采用响应面法对鹅油甘油二酯微胶囊的制备工艺进行了优化。试验结果表明,壁材:芯材为2.4:1,酪蛋白酸钠:β-环糊精为1:1.2,固形物含量为23%,乳化剂用量为0.7%时,鹅油甘油二酯包埋率达到93.7%。     

双水相萃取生姜中姜油树脂的研究

以β-环糊精、碳酸钠、氯化钠作为双水相萃取剂,构成双水相萃取体系,进行萃取生姜中姜油树脂的研究.结果显示,溶液分相清晰,姜油树脂的代表成分姜辣素的分配系数在0.21-0.32,姜辣素的萃取率可达71.6%.β-环糊精是萃取相的主要组成成分,碱和盐有助于提高姜辣素在萃取相中的分配比例并提高萃取率.β-环糊精为主要材料构成的双水相萃取系统萃取生姜中姜油树脂的技术可行,工艺的实用性强.     

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