天然维生素E微胶囊化研究

本文研究了制造微胶囊化天然维生素Ｅ粉末的工艺和技术。工艺过程包括乳化液的制备和喷雾干燥造粒。影响工艺及产品性能的因素包括原料配方、乳化工艺条件、均质压力及喷雾干燥造粒工艺条件等。结果表明：原料配比为天然维生素Ｅ３０～４０％，乳化剂４～５％，稳定剂０．５～１．２％，碳水化合物和蛋白质等壁材５５～６５％。最佳均质压力为３５～４０ＭＰａ，喷雾干燥工艺条件为进风温度１９０℃，出风温度７５℃，进料温度５０～６０℃，进料流量１３０ｍｌ／ｍｉｎ。性状分析及贮存实验表明：微胶囊型天然维生素Ｅ的水溶性、流动性、分散性及稳定性等性能指标良好。     

微胶囊型天然VE的研究

研究了喷雾干燥法制造微胶囊型VE粉末的微胶囊化工艺及技术.结果表明制造微胶囊型天然VE的壁材及其最佳组合为阿拉伯胶糊精玉米糖浆=22.5%25.O%52.5%,心材与壁材的适宜比例为65,最佳均质压力为30MPa,最佳喷雾干燥造粒工艺条件为进料温度60℃、进料流量150mL/min、进风温度195℃、出风温度70℃.     

微胶囊型维生素E粉末的研究

本文研究了制造微胶囊型维生素Ｅ粉末的微胶囊化工艺及技术。其工艺过程包括Ｏ／Ｗ型乳化液的制备、均质与喷雾干燥造粒，影响其工艺及产品性能的因素有原料配方、乳化工艺条件、均质压力及喷雾干燥造粒工艺条件。通过实验研究得出：原料配方为维生素Ｅ３０￣４０％、ＨＬＢ值为５￣７的混合乳化剂４￣６％、稳定剂０．２￣０．４％及碳水化合物和蛋白等壁料５５￣６５％，最佳乳化工艺条件为加水量２￣３倍于维生素Ｅ和固型物总重量     

微胶囊型天然维生素E粉末的研制

本文研究了喷雾干燥法制造微胶囊型维生素E粉末的工艺及技术。结果表明 :制造微胶囊型天然维生素E的壁材及其最佳组合为阿拉伯胶∶糊精∶玉米糖浆=22 5%∶25 0 %∶52 5 % ;心材与壁材的适宜比例为6∶5 ;均质压力为30MPa;喷雾进料温度60℃、进料流量150ml/min、进风温度195℃、出风温度70℃。     

番茄红素的微胶囊化研究和稳定性实验

研究了喷雾干燥法制备微胶囊番茄红素粉末的工艺及技术,结果表明,在天然番茄红素微胶囊的生产过程中,制造微胶囊型番茄红素的壁材最佳组合为:以阿拉伯胶和糊精以1∶1的质量比混合作为壁材,原料固形物含量为20%,芯材和壁材的适宜比例为1∶6;高压均质可有效地提高天然番茄红素的微胶囊化效率和微胶囊化产率,其最佳均质压力为30MPa;最佳喷雾干燥造粒工艺条件为:进风温度190℃、出风温度65～75℃、进料量为4.0mL/min、进风压力为0.15MPa。     

大蒜精油的提取及微胶囊化的工艺研究

文章采用大蒜为原料，采用纤维素酶进行酶解，以95％的乙醇为溶剂，经浸渍和连续浸提所得的蒜素为心材，以食用胶为壁材，经均质、喷雾干燥而得大蒜油树脂微胶囊。通过正交试验获得微胶囊化的最佳工艺条件，最佳工艺条件为心材：壁材为1：3，进风温度150℃，进料速度为1．56L／h，进料浓度为35％。     

辛烯基琥珀酸淀粉酯包埋肉桂精油微胶囊的研究

以辛烯基琥珀酸淀粉酯为壁材,利用喷雾干燥法制备了肉桂精油微胶囊.探讨了固形物含量、芯壁比、均质时间、均质温度、进风温度、进料速度、出风温度对微胶囊化效果的影响,经过单因素实验,确定了最佳工艺条件.实验结果表明,均质时间180 s,芯壁比1:4,固形物含量30％,均质温度50℃.肉桂精油最佳微胶囊化的最佳喷雾干燥条件为进风温度198℃,出风口温度100℃,进料速度55 mL/min.所获得的肉桂精油微胶囊产品中精油的含量为92.76％.     

抗氧化剂二丁基羟基甲苯（BHT）的微胶囊化

研究了喷雾干燥法制备高包埋率微胶囊化二丁基羟基甲苯(BHT)的壁材组成及工艺条件。结果表明，最佳组合为：BHT／壁材20％、阿拉伯胶／麦芽糊精1：3、海藻酸钠含量0．6％、乳化温度70℃、一级均质压力20MPa、二级均质压力45MPa、喷雾干燥进风温度200℃、出风温度90℃，该工艺条件下BHT的微胶囊化效果最好，包埋率最高。     

以水解大豆蛋白为主要壁材的β-胡萝卜素微胶囊化

水解大豆蛋白分别与糊精（ＳＰＨ＋ＭＤ）以及蔗糖（ＳＰＨ＋Ｓ）复配为壁材微胶囊化β－胡萝卜素，研究结果表明，ＳＨＰ＋Ｓ壁材体系的微胶囊化产品的效率明显优于ＳＰＨ＋ＭＤ壁材体系产品，产率无显著差异。相应的较优工艺参数为：壁材中蛋白质与蔗糖比例为６∶１４，体系壁材浓度２０％，黄原胶浓度０．５％，乳化时均质压力４０Ｍｐａ（乳化温度７０℃），喷雾干燥进风温度１９５℃（出风温度８０～９０℃）。     

甾醇酯微胶囊制备工艺研究

研究了喷雾干燥法制备微胶囊化甾醇酯的工艺。研究结果表明:微胶囊化甾醇酯的最优乳化条件为:复合乳化剂配比(单甘酯∶蔗糖酯)为1∶9;乳化剂用量0.75%;壁材用量20%;壁材比(变性淀粉∶麦芽糊精)为1∶5;芯材/壁材为0.5。喷雾干燥法制备甾醇酯微胶囊的最佳工艺参数为:进料温度50～60℃、均质压力50 MPa、进风温度180℃、出风温度80℃、喷雾压力180 KPa。在此工艺条件下微胶囊化效率可达77.8%。     

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.     

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     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press