燕麦膳食纤维酸奶的研制

以燕麦与鲜奶为主要原料,研究了燕麦膳食纤维酸奶最适配方与最佳工艺条件。以产品的感官质量和理化分析为指标,采用正交试验法与模糊综合评判法确定了最佳基本配方和最优工艺条件为:燕麦粉添加量3%,酸奶添加量20%,白砂糖添加量6%;发酵时间4.5 h,发酵温度42℃。研制的燕麦酸奶具有燕麦独特的香味,酸甜适度。     

芒果椰浆凝固型酸奶的发酵工艺研究

用芒果与椰浆为原料,研究了芒果椰浆凝固型酸奶的发酵工艺条件。通过考察奶粉添加量、接种量、蔗糖添加量、椰浆添加量、芒果添加量、发酵温度和发酵时间对芒果椰浆凝固型酸奶感官评价的影响,设计正交试验,最后获得了芒果椰浆凝固型酸奶的最佳工艺条件:奶粉添加量14%,接种量3%,蔗糖添加量8%,椰浆添加量10%,芒果添加量10%,发酵温度42℃,发酵时间4 h。     

搅拌型燕麦酸奶的研制

以鲜牛奶扔和燕麦为主要原料,研究搅拌型燕麦酸奶的加工工艺条件.通过单因素试验和正交试验确定燕麦最佳糖渍条件和制作燕麦酸奶的最佳工艺参数.结果表明,燕麦最佳糖渍条件:糖渍时间为36 h,糖渍温度为70℃,蔗糖质童分数为50%;当蔗糖添加量为6%,接种量为4%,燕麦添加量为6%(均为质量分数)和在40℃下发酵时间为4h时即可得到优质的燕麦酸奶制品.     

均匀设计法在黄瓜酸奶发酵工艺条件优化中的应用

以黄瓜和奶粉为原料,研究了黄瓜酸奶的发酵工艺条件。通过单因素试验考察了黄瓜浆添加量、蔗糖添加量、奶粉添加量、发酵时间、发酵温度和接种量对黄瓜酸奶的感官评价的影响,选出对黄瓜酸奶感官评价影响较大的因素和水平,进行正交实验,最后获得了黄瓜酸奶发酵的最佳工艺条件。结果表明,黄瓜酸奶发酵的最佳的工艺条件:黄瓜浆添加量9%(体积分数),蔗糖添加量80 g/L(质量浓度),奶粉添加量110 g/L(质量浓度),接种量4%(体积分数),发酵时间4 h。利用本工艺得到了一种具有黄瓜特有清爽口味的黄瓜酸奶。     

响应面法优化火麻仁中药型酸奶的发酵工艺研究

本研究以火麻仁、脱脂奶粉为主要原料,通过单因素试验分别考察了火麻仁浆添加量、奶粉添加量、蔗糖添加量、接种量、发酵温度和发酵时间对火麻仁酸奶感官评分的影响,并利用响应面分析法进行了方差分析,建立了数学模型,得到了火麻仁中药型酸奶的最佳发酵工艺条件。结果表明：火麻仁酸奶的最佳发酵工艺条件为：火麻仁添加量13%、奶粉添加量14%、蔗糖添加量8%、接种量8%、接种量6.5%、发酵温度43℃、发酵时间3.5h。在此工艺条件下制备的火麻仁酸奶具有火麻仁特有的甘甜味,质地均匀,柔滑可口。     

响应面法优化红豆酸奶发酵工艺的研究

以红豆和奶粉为主要原料,研究了红豆酸奶的发酵工艺。以感官评价为指标,通过单因素实验分别考察了红豆浆添加量、蔗糖添加量、奶粉添加量、接种量、发酵时间、发酵温度等对红豆酸奶感官评价的影响。利用Design-expert软件设计了正交试验,并用响应面分析法获得了红豆酸奶发酵的最佳工艺条件为:红豆浆浓度10%,红豆颗粒量5%,蔗糖添加量8%,奶粉添加量10%,接种量4%,发酵温度40℃,发酵时间5h。采用本工艺得到的红豆酸奶色泽微红,酸甜可口,爽滑细腻。     

玫瑰酸奶的研制

以奶粉为主要原料,添加玫瑰花茶,在单因素基础上进行正交试验,通过感官评定确定玫瑰酸奶的最佳工艺配方。结果表明,影响玫瑰酸奶品质的因素依次为玫瑰花茶添加量、发酵时间、酸奶添加量和白糖添加量。最佳工艺配方:奶粉添加量为10%、白糖添加量为5%、酸奶添加量为5%、玫瑰花茶添加量为1.5%;在40℃条件下发酵4 h后于4℃冰箱冷藏24 h,此条件下制得的玫瑰酸奶品质良好。     

燕麦小米酸奶的研制

以燕麦米,小米为主要原料,对凝固形燕麦米小米酸奶的加工工艺进行了研究,用干酪乳杆菌、保加利亚乳杆菌、嗜热链球菌按1∶1比例作为菌种,经正交设计及实验确定,燕麦小米酸奶的工艺条件为:9%奶粉量、9%含糖量、3%接种量、燕麦,小米比1:1、发酵时间5h、发酵温度42℃.按照此配方反复进行验证,可以确定此配方可获得口感,风味较好的燕麦米小米酸奶.     

凝固型淮山酸奶的制作工艺优化

以淮山粉、脱脂奶粉为原料,探究淮山酸奶的发酵工艺。以感官评价为响应值,在单因素实验的基础上,利用Plackett-Burman实验、最陡爬坡实验、响应面优化法进行分析,确定了淮山粉、奶粉、白糖的添加量、发酵时间和发酵温度,并对酸奶成品进行理化及微生物指标检测。结果表明:淮山酸奶发酵的优化工艺条件为淮山粉添加量4.9%、奶粉添加量8.0%、白糖添加量5.9%、发酵时间5.5 h、发酵温度43℃,此条件下的酸奶感官评分为92分,与预测值(93.129分)相差较小。理化及微生物指标检测结果为酸度81oT,糖度为8.13oBrix,乳酸菌数量为1.09×108mL-1,未检测出大肠杆菌,蛋白质含量为3.1%,以上结果均符合国家食品标准。     

燕麦红茶酸奶加工工艺的研究

以燕麦粉、红茶和脱脂奶粉为主要原料,以市售乳酸菌为发酵剂,经发酵可得一种新型凝固性酸奶。通过单因素试验、正交试验对燕麦红茶酸奶的风味进行感官评价,确定最佳配方和工艺为:白砂糖添加量为9%,燕麦粉添加量为2.5%,红茶茶汤添加量为10%,接种量为0.3%,发酵温度为42℃,发酵时间为6h,琼脂添加量0.4%。所制备的酸奶质地均匀,品质优良,具有燕麦和红茶的营养及风味。     

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