新疆地产干果复合汁乳酸菌发酵饮料的研制

以葡萄干、杏干、酸梅、红枣为原料,利用保加利亚乳杆菌和嗜热链球菌为菌种研制发酵型饮料。采用正交试验,分别确定其最佳发酵液、最佳发酵条件和口感稳定性的工艺配方,用火焰原子吸收法和高效液相法分别测定成品中的微量元素锌、铁及VC。实验结果显示最佳发酵液中杏干、酸梅、红枣、葡萄干与水的浸泡比分别为25%、25%、10%、20%(g/100ml);最佳发酵工艺条件:接种3%,发酵时间36h,发酵温度为40℃,发酵饮料调配最佳配方:在发酵液中加入蔗糖6%,柠檬酸0.04%,CMC-NA0.4%,黄原胶0.03%。微量元素锌、铁和VC含量分别为0.23、0.52、0.344mg/ml。     

响应面法优化红心火龙果皮发酵饮料发酵工艺

以红心火龙果皮为主要原料制作发酵饮料并优化其发酵工艺。以花青素含量、花色苷含量和总酸度为考察指标,经单因素试验分析料水比、酶添加量、初始糖度和酵母菌接种量对发酵饮料的影响,并通过响应面分析方法对影响较大的3个因素进行优化,确定火龙果皮发酵饮料的最佳发酵工艺。结果表明,在料水比为1∶5（g∶mL）,果胶酶添加量为0.8%,初始糖度为20%,酵母菌接种量为0.3%的发酵条件下,得到的发酵饮料香味浓郁,口味独特,花青素含量为0.61 mg/mL,花色苷含量为1.90 mg/mL,总酸度为0.44 g/100 mL。     

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。     

绿豆、红枣复合酸牛乳饮料的研制

以绿豆、红枣、酸奶为主要原料,研制绿豆、红枣复合酸牛乳饮料。以饮料感官指标为考察标准,通过单因素试验和正交试验确定饮料最佳工艺条件:绿豆汁和红枣汁的混合比例为6∶4(V/V),混合汁添加量为20mL/100mL,蔗糖添加量为10g/100mL,柠檬酸添加量为0.10g/100mL;稳定剂为CMC-Na、卡拉胶组成的复合稳定剂,添加量分别为0.3g/100mL和0.01g/100mL;单甘酯为乳化剂,添加量为0.05g/100mL。该产品营养全面,具有独特风味和较好的保健功能,有较高的推广价值。     

鸡腿菇红树莓汁复合饮料研制

以鸡腿菇、红树莓为主要原料,运用正交试验对鸡腿菇和红树莓复合饮料的加工工艺进行探讨.结果表明复合饮料的最佳配方为:鸡腿菇汁含量为35%,树莓汁含量为12%,白砂糖含量为16%,柠檬酸含量为0.06%.产品最适的稳定剂添加量为黄原胶0.010g/100mL,羧甲基纤维素钠0.016g/100mL,柠檬酸三钠0.020g/100mL.     

恰玛古饮料工艺技术研究

以恰玛古、杏干、红枣、葡萄干为主要原料,经加工制成有益于人体健康的天然碱性饮料。文中主要对产品风味、稳定性进行研究,并通过单因素、正交实验,确定了最佳工艺参数为:V(恰玛古浆):V(杏浆):V(红枣浆):V(葡萄浆)=20:13:15:10;柠檬酸0.08%、VC0.3%、安赛蜜0.025%;0.3%β-环糊精脱嗅;最适稳定剂配方为CMC-Na0.3%、β-环糊精0.1%复合使用。     

红枣豆奶复合饮料的研制

以红枣、大豆为主要原料,研制红枣豆奶复合饮料。以饮料感官评价为指标,通过单因素试验和正交试验确定饮料最佳配方:红枣汁和豆奶的混合比例为4∶6(体积比)、混合汁添加量为40%、柠檬酸添加量为0.08%、白砂糖添加量为6%、黄原胶添加量为0.3 g/100 mL、卡拉胶添加量为0.03 g/100 mL、单甘酯添加量为0.01 g/100 mL。在此条件下制得的红枣豆奶复合饮料感官评分最高,富有红枣和豆奶双重风味,具有较好的市场推广潜力。     

模糊数学方法研制麦麸悬浮饮料

目的利用麦麸中阿魏酸等活性成分研制一款全麦麸食品。方法采用均匀试验设计原理,结合模糊数学综合分析法,探讨出一种麦麸悬浮饮料的最佳配方比例。结果白砂糖添加量为3.5g/100mL、麦麸:水为1:100(g:mL)、复合稳定剂添加量为0.08g/100mL、黄原胶:魔芋胶为7:3(m:m)为麦麸悬浮饮料最佳配方比例。产品中膳食纤维总量为0.872 g/100 mL,黄酮含量为0.92 mg/100 mL,阿魏酸含量为2.81 mg/100 mL,二苯基苦酰肼基自由基清除率达到63.9%。结论制备的麦麸悬浮饮料口感顺滑,具有浓郁麦香味,麦麸颗粒能够均匀稳定悬浮。     

米糠蛋白质营养饮料的制取

本文介绍了以木瓜蛋白酶水解米糠中的蛋白质,进而制取米糠营养饮料的实验研究情况。通过对多种实验条件进行比较与选择,得出水解的最适条件为:pH值6(自然状态)、酶浓度2.0%、固液比1:5、温度80℃、时间2h,米糠中蛋白质水解率达48.2%。米糠水解液经调节酸度、糖度,高温灭菌而制成饮料,其中蛋白质含量为1.53 g/100 mL,Ca~(++)含量为80 mg/100 mL,Mg~(++)含量为2.86 mg/100 mL。     

混浊型炮制佛手饮料配方优化及稳定性研究

以经过炮制的佛手为原料,离心沉淀率和感官评分为指标,通过正交试验和响应面试验优化炮制佛手混浊型饮料的稳定剂配比及调配配方。结果表明：以海藻酸钠、瓜尔胶、罗望子胶为炮制佛手混浊型饮料的稳定剂,海藻酸钠添加量0.06%、瓜尔胶添加量0.06%、罗望子胶添加量0.08%时,稳定效果最好。混浊型炮制佛手饮料的最佳配方为佛手果浆与水质量比1∶2、柠檬酸添加量0.15%、果葡糖浆添加量3%、复合稳定剂添加量0.06%。该配方下佛手饮料的pH值为3.1,可溶性固形物含量为8.33 g/100 mL,还原糖含量为0.14 g/100 mL,总酸含量为0.9 g/mL。     

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