杏仁酸乳的研制

以苦杏仁为原料和鲜牛乳为原料,经脱皮、去苦、乳化和发酵等主要工艺步骤获得杏仁乳生产最佳技术参数。结果表明,杏仁酸乳发酵工艺的条件为：杏仁乳:牛乳比例为30:70,接种量5%,发酵时间为5 h,按照以保加利亚乳杆菌、嗜热链球菌(1:1)接种,42 ℃条件下发酵,可得品质优良的杏仁酸乳。     

整蛋白/短肽复合型特膳营养乳的乳化稳定剂配方与均质工艺优化

本文分析了影响整蛋白/短肽复合型特膳营养乳稳定性的主要因素,对其乳化稳定剂的配方及均质加工工艺进行系统优化。结果表明:特膳营养乳的最适HLB为8.40,即蔗糖脂肪酸酯与蒸馏单硬脂酸甘油酯的最佳配比为5:5,复合乳化剂的添加量为0.2%;稳定剂的最佳配方为羧甲基纤维素0.12%,黄原胶0.05%和海藻酸钠0.02%;最佳均质条件为均质压力20 MPa,均质温度60℃,均质次数2次。     

松仁乳的研制

本研究对松仁乳专用乳化稳定剂进行优选,并对松仁乳产品稳定性进行研究。结果表明,松仁乳专用乳化稳定剂的最佳配比为:单甘酯0.12%,蔗糖酯0.08%,黄原胶0.02%,瓜尔豆胶0.03%,PURITY GUM0.02%,海藻酸钠0.02%。松仁乳的HLB值为6,[Ca2 ]≤1mmol/L,在80- 85℃,pH6.5-7.5,40MPa均质两次,松仁乳产品具有较好的稳定性。     

大枣、杏仁植物蛋白饮料加工工艺研究

采用河南新郑大枣和杏仁为主要原料,研究了大枣、杏仁复合植物蛋白饮料的加工工艺.结果表明:该饮料的最佳配方为:大枣汁:杏仁浆=3:1、pH4.05、复合乳化稳定剂(黄原胶:海藻酸钠=1:2,HLB=8)O.09%;最佳杀菌工艺参数为:杀菌温度100℃:、杀菌时间20min.     

改性甜玉米发酵乳的研制

通过单因素和正交实验确定了改性甜玉米发酵乳的发酵工艺条件。结果表明,改性玉米浆与鲜乳以1︰1.5的质量比混合,加入质量分数为3%蔗糖+3%乳糖,稳定剂的添加量为0.2%果胶+0.1%单甘酯,选用保加利亚乳杆菌和乳酸链球菌1︰1的比例按4%的接种量接种,在43℃条件下发酵7 h,可得到质地均匀、口感细腻、具有甜玉米清香的发酵乳。     

安哥诺李-杏仁复合蛋白饮料的加工工艺研究

本实验研究了安哥诺李、杏仁复合蛋白饮料的加工工艺,着重研究了乳化剂和稳定剂的添加量,安哥诺李、杏仁复合蛋白饮料的最佳配方以及杀菌等工艺参数。结果表明:复合乳化剂(HLB=8)(司盘60:吐温40=25:11)为0.13%,复合稳定剂(黄原胶:卡拉胶=1:2)为0.12%,最佳配方为安哥诺李汁与杏仁浆的配比10:11,蔗糖10%,最佳杀菌工艺为杀菌温度100℃,杀菌时间20min。     

粉末化猪油工艺的研究

猪油与油溶性乳化剂、水溶性乳化剂及壁材等在一定条件下混合均匀、乳化、均质,经喷雾干燥得粉末化猪油.单因素试验表明,最佳乳化条件为:壁材为大豆分离蛋白、β-环状糊精和可溶性淀粉复合使用,亲油乳化剂为单甘酯,亲水乳化剂为Tween 60,HLB值为6～8,乳化剂用量2%～3%,稳定剂明胶用量1.6%～2.0%,加水量10～15倍于基料,乳化温度70℃,乳化时间20min.在其他条件不变的情况下,通过正交试验研究了乳化剂用量、HLB值、明胶用量和壁材对粉末化猪油的溶解度、产品结块状态的影响.研究结果表明,制备40%含油量的粉末化猪油的最佳配方为:乳化剂用量3%,HLB值6,明胶用量2.3%,大豆分离蛋白、β-环状糊精和可溶性淀粉复合作壁材.     

杏仁乳发酵果酒的工艺优化研究

杏仁具有很好的营养和保健作用,以杏仁为主料山楂为辅料红曲作为发酵剂进行杏仁果酒发酵研究。通过实验得出杏仁果酒最佳工艺为:主发酵时间7 d,初始pH为4.5,酵母菌接种量为7%,在26℃的温度下后发酵后陈酿,澄清过滤后得到酒度在8.5%的保健型杏仁果酒。     

红枣杏仁复合蛋白饮料的研制

以红枣、杏仁为主要原料,以感官评分作为评定标准,采用正交试验设计,确定红枣杏仁复合蛋白饮料的最佳配比。实验结果表明,红枣杏仁复合蛋白饮料最佳配方为:白砂糖6%、蜂蜜2%、杏仁乳30%、红枣浆15%,羧甲基纤维素钠0.03%,黄原胶0.06%,蔗糖酯0.07%,单硬脂酸甘油酯0.13%。所得产品具有红枣和杏仁所特有的香气,口感细腻,组织状态良好。     

黑米黑豆黑芝麻复合饮料的研制

黑米、黑豆和黑芝麻均具有较高的营养及保健价值,通过单因素和正交试验对三者复合饮料的加工工艺进行研究。结果确定黑米的烘烤条件为150℃烘烤10min,黑米乳的糊化条件为90℃糊化20min;黑米乳的最佳酶解工艺参数为先采用0.3%高温淀粉酶在80℃酶解60min,然后采用0.2%碱性蛋白酶在60℃酶解50min;通过风味调配试验确定饮料的最佳配方是黑米乳:黑豆乳:黑芝麻乳＝5:2:3,加水量为原料的2倍,蔗糖添加量6%;添加0.1%羧甲基纤维素钠、0.5%海藻酸钠、0.12%黄原胶组成的复合稳定剂,以及0.02%蔗糖酯、0.06%三聚甘油单硬脂酸酯、0.16%聚甘油脂肪酸酯组成的复合乳化剂,并且经过60℃、25MPa、二次均质,110℃杀菌30min,制备出的复合饮料口感细腻、营养丰富、稳定性较好。     

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