金樱子火棘复合果酒的研制

以金樱子火棘为原料生产复合保健果酒,采用正交试验法对发酵型金樱子火棘果酒的加工工艺及影响因素进行分析。原料配比V(金樱子)∶V(火棘)为2∶1,SO2添加量40mg/L,发酵温度30℃,酵母菌用量为1.0%时所得产品颜色橙红,风味纯正,口感醇厚,具有独特的金樱子火棘果香。     

樱桃草莓复合果酒的发酵工艺优化

以樱桃和草莓为原料,对樱桃草莓复合果酒的发酵工艺进行研究。确定樱桃汁和草莓汁最佳体积比为1∶1。通过响应面分析法确定樱桃草莓复合果酒发酵最佳工艺,即接种量为7.9%,SO2添加量为65.9 mg/L,发酵温度为31.4℃,初始糖度为15.4%,此条件下,樱桃草莓复合果酒的酒精度为13.6%vol,且果香馥郁,典型性突出,口味柔和。     

金樱子蜂蜜酒酿造工艺研究

采用金樱子和蜂蜜为原料,驯化的黄酒酵母为菌种,生产高品质的金樱子蜂蜜酒.对金樱子添加量、发酵温度、pH值、起始糖度等4个因素进行了单因素和正交试验.结果表明,pH值对金樱子蜂蜜酒的酿造影响显著,其他主次因素依次是金樱子添加量、温度和糖度;在温度22℃,初始糖度26 Brix,pH 3.8,金樱子添加量11.5％,发酵周期21d的条件下,酿制的果酒自然澄清,酒精度高达13.3 ％vol,基酒酒香浓郁,余味长久,酒体协调,清香怡人.金樱子可为酿造蜂蜜酒提供适量的氮源,赋予产品淡雅的果香和醇厚的口感.     

金樱子发酵果酒生产工艺的研究

利用野生金樱子果实为原料,选用葡萄酒酵母法国K1,果胶酶EXV等研制金樱子酒.探讨了金樱子发酵酒的生产工艺及关键技术,结果表明,发酵生产的金撄子果酒香气浓郁宜人,风格独特,典型性强.     

蜂蜜草莓酒的酿造工艺的优化

通过对新鲜草莓的处理、破碎后得到果汁进行果酒发酵.设计单因素实验研究发酵过程中蜂蜜的添加量、酿酒酵母的添加量、果胶酶的添加量、发酵时间的控制对草莓果酒品质的影响,在通过单因素水平测定后,进行正交实验的设计,确定复合果酒的最优组合,在果汁中蜂蜜添加量为10％,酵母的添加量为0.1％,果胶酶添加量为0.2％,发酵时间为15...     

不同澄清剂对金樱子发酵果酒澄清效果的影响

以果胶酶、明胶、膨润土、壳聚糖四种澄清剂单一或者复合使用的处理方法对金樱子发酵果酒进行澄清处理,测定了金樱子果酒澄清处理前后的透光率、酒精度、总糖、总酸以及相应感官评价等指标.实验结果表明:以复合澄清剂澄清效果最佳,即明胶0.02g/L、膨润土1.2g/L和壳聚糖0.4g/L,经澄清处理后,果酒的理化性质变化小,酒精度为14.2％vol,总糖4.5g/L,总酸2.8g/L,透光率96.5％,处理后的果酒呈宝石光泽,果香、酒香良好、酒体醇厚,典型优雅.     

草莓酒发酵菌种的筛选及工艺优化

以草莓为原料,分别加入10种不同酵母进行草莓酒发酵,筛选出了发酵草莓酒感官得分相对较高的3种酵母：酵母F10、帝伯仕.果酒专用酵母(红)、Lalvin D254酵母。在此基础上,以果酒感官评分为评价指标,酵母种类、发酵温度、菌种添加量为影响因素进行3因素3水平的正交试验优化发酵工艺。试验结果表明：酵母种类对感官评分影响显著(P＜0.01),草莓酒发酵最佳条件为：酵母F10,添加量0.01%,发酵温度为20 ℃,此条件下果酒的感官评分达92.5分,酒精度是12.5%vol。     

金樱子酸奶的研制

以金樱子为辅料,奶粉为主料,通过添加保加利亚乳杆菌、嗜热链球菌,发酵制成金樱子酸奶饮料。首先采用热水浸提法和榨汁法对金樱子提取汁液进行对比试验,根据测量所得金樱子汁糖分含量确定浸提法为取汁最佳方法,即在90℃下水浴4h,然后通过单因素试验和L9(34)正交试验,确定金樱子酸奶的最佳发酵条件为:水∶奶粉为1∶6,金樱子汁为还原乳的17.5%,蔗糖量添加为8%,接种量7%,最佳发酵温度42℃,时间6h。发酵完后产品采用4℃、10h低温后发酵,最后可获乳白偏淡黄色,味道酸甜的凝固型金樱子酸奶。     

金樱子酸奶的研制

以金樱子为辅料,奶粉为主料,通过添加保加利亚乳杆菌、嗜热链球菌,发酵制成金樱子酸奶饮料。首先采用热水浸提法和榨汁法对金樱子提取汁液进行对比试验,根据测量所得金樱子汁糖分含量确定浸提法为取汁最佳方法,即在90℃下水浴4h,然后通过单因素试验和L9(34)正交试验,确定金樱子酸奶的最佳发酵条件为:水∶奶粉为1∶6,金樱子汁为还原乳的17.5%,蔗糖量添加为8%,接种量7%,最佳发酵温度42℃,时间6h。发酵完后产品采用4℃、10h低温后发酵,最后可获乳白偏淡黄色,味道酸甜的凝固型金樱子酸奶。     

草莓果酒酿造工艺的优化及其香气成分分析

以草莓为原料,采用单因素试验和Box-Behnken试验设计研究SO2添加量、酵母添加量及发酵温度对果酒发酵的影响,建立各影响因素的回归方程,并通过响应面分析法优化,得到草莓果酒的最佳工艺条件：SO2添加量为81 mg/L、酵母添加量为1 g/L、发酵温度为20 ℃。然后采用顶空固相微萃取法,利用气相色谱-质谱联用技术对草莓果酒香气成分进行分析与鉴定,结果表明：从草莓果酒中共鉴定出香气物质85 种,占总峰面积的99.55%;其主体香气物质主要是异戊醇、乙酸异戊酯、己酸乙酯及辛酸乙酯。     

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