火龙果果醋及其醋饮料的工艺研究

以火龙果为原料,探讨了酒精和醋酸发酵的工艺条件,通过试验确定了酒精发酵的工艺条件为酵母菌接种量8％,糖度15％,27℃恒温发酵5d,发酵液的酒精度为7．9％。醋酸发酵的工艺条件为醋酸菌接种量10％,糖度5％,酒精度6％,30℃恒温振荡发酵6d,火龙果原醋的总酸为37g／L。火龙果果醋饮料的最佳配方为火龙果原醋15mL／100mL,蜂蜜7g/100mL,白砂糖2g／100mL。     

谷氨酸棒杆菌S6产L-组氨酸发酵工艺的研究

对L-组氨酸产生菌株发酵条件进行了优化,试验结果表明：种子培养基的最佳菌龄12h;菌种发酵周期60h。发酵培养基主要成分的质量浓度分别为葡萄糖100g／L,硫酸铵40g／L,玉米浆15g／L,硫酸镁2g／L。最佳发酵条件为300mL摇瓶的装液量30mL,接入2．25mL液体菌种,pH7．4,转速130r／min。将其应用于产生菌株S6,其L-组氨酸最高产量达到了577mg／L,比原发酵条件的222mg／L提高了160％。     

香瓜醋酸发酵保健饮料的研究

为开发利用我国的香瓜资源，对香瓜醋酸发酵保健饮料的酿制工艺以及调配工艺进行了研究。通过拟水平均匀试验优选出醋酸发酵的最佳工艺条件：酒精发酵的最优条件为：接菌种量10．16％，温度30．62℃，表观糖度20．23OBx；醋酸发酵的最优条件为：接菌种量为10％，温度29．04℃，酒精度为（v/v）7．015％。通过正交试验优选出最佳的醋酸发酵保健饮料调配方案：香瓜醋250mL／L，香瓜汁50mL／L，甜赛糖-102％，低聚果糖5％。所得的饮料具有清爽宜人、酸甜可口、营养丰富等特点。     

响应面法优化金刺梨酵素发酵工艺

以金刺梨为原料,乳酸菌为发酵菌种制备金刺梨酵素。在单因素试验的基础上,以感官评分为响应值,通过响应面法优化乳酸菌发酵金刺梨酵素工艺条件,并对其品质指标及抗氧化活性进行分析。结果表明,最佳发酵条件工艺条件为：乳酸菌发酵剂接种量3%、发酵时间49 h、发酵温度38℃、白砂糖添加量7%,在此优化条件下,金刺梨酵素pH值为3.62,感官评分为95分,总黄酮含量为4.38 mg/mL,超氧化物歧化酶（SOD）活力为6 998.40 U/g,维生素C含量为721.80 mg/100 mL,总酚含量为21.78 mg/L,总酸含量为17.41 g/L,1,1-二苯基-2-三硝基苯肼（DPPH）自由基清除率为88.65%,乳酸菌活菌数对数值为7.69。     

多菌混合发酵鲜枣果醋的工艺研究

采用一株分离得到的植物乳杆菌与酵母协同完成酒精发酵,再接种醋酸菌发酵制作鲜枣发酵醋,减少了枣醋的尖酸感,增加了柔和度,改善了枣醋的风味口感,提高了枣醋的品质。研究得出多菌混合最佳酒精发酵工艺：酵母接种量为2.0%,乳酸菌最佳接种量为2.0%,发酵pH为4.5,发酵温度为28 ℃,初糖为15%,产酒精度为8.4%vol;产乳酸2.13 g/L。最佳醋酸发酵工艺：接种量为12%,发酵温度为34 ℃,搅拌转速 200 r/min,总酸含量达到5.7 g/100 mL。     

金桔果醋发酵工艺研究

以金桔为原料,采用液态发酵工艺,分别进行酒精发酵、醋酸液体摇瓶发酵制成金桔果醋.试验结果表明,酒精发酵阶段的最适宜工艺条件:初始糖度17％,活性干酵母接种量0.2％,发酵温度为32℃;醋酸发酵适宜条件:醋酸菌接种量10％,初始酒精度7％vol,醋酸菌的适宜发酵温度为32℃.在此最佳条件下,金桔果醋的醋酸含量达到4.7g/100mL以上.     

黑米醋及其饮料的研制与开发

本文论述了黑米醋的酿制工艺，同时对黑米醋饮料作了一定的研究。以黑米为原料，经过糖化、液体酒精发酵和醋酸发酵等工艺过程，得到了一种澄清透明、淡红色、略带黑米香味，酸味柔和的新型食醋。以单因子试验法确定糖化试验最佳条件为：糖化酶用量为600U／g，料水比1：4，糖化温度为60℃，糖化48h为最佳；酒精发酵控制在初糖度为11°Bx，发酵温度为52℃，发酵3d为好；在初始酒精分数为7％，温度32℃，发酵5d后酸液中总酸含量可达2．0g／100mL以上。然后，以黑米醋为原料，添加甜味剂、柠檬酸、乳酸钙等辅料调配酸甜可口、营养丰富的黑米醋饮料。     

苦荞麦保健醋酿造工艺研究

以苦荞为原料，辅加10％的复合果汁，采用液体深层发酵生产工艺，研究了发酵过程中各主要成分的变化，并确定了加工工艺参数。酒精发酵采用耐高温活性酒精干酵母(TH-AADY)，添加量为0．2g／L，发酵温度30℃，发酵时间3～4d；醋酸发酵采用AS1.41，发酵温度35℃，发酵时间3～4d．醋酸可达4．9g／100mL以上。     

桑叶发酵保健饮料的研制

以桑叶为主要原料,通过酵母菌、醋酸菌发酵,配以其它原辅料,制作发酵保健饮料,并采用对比试验和正交试验,找出最佳发酵工艺条件和配方。最佳发酵条件是桑叶粉含量为90g/L,CaCO3浓度是6g/L,在发酵温度28～30℃条件下发酵2d;最佳配方为蔗糖13.2g,果汁100ml,发酵液150ml/L。     

黑枸杞果醋发酵工艺条件优化

以黑枸杞干果为原料制备黑枸杞果醋,通过单因素试验、正交试验与响应面试验,确定黑枸杞果醋酒精发酵和醋酸发酵的最佳工艺条件。结果表明,最适于酒精、醋酸发酵的菌种分别为葡萄酒果酒酵母、沪酿1.01醋酸菌。酒精发酵的最佳工艺条件为：黑枸杞干果添加量为15%,初始糖度17%、发酵温度32 ℃、接种量4%;醋酸发酵的最佳工艺条件为：发酵温度30 ℃、接种量7%、装液量42 mL/250 mL。在此优化条件下,黑枸杞果醋的酸度为3.76 g/100 mL,花青素含量为0.55 g/100 mL。黑枸杞果醋饮料色泽深紫、酸度适中,具有浓郁的果醋香和黑枸杞的清香。     

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