核桃酸奶的研制

核桃酸奶是以核桃浆、牛奶、白砂糖为主要原料,通过调配、均质、杀菌、发酵等加工工艺而制成的一种风味优良、营养丰富的酸奶制品.试验结果表明:在牛乳中加入15%的核桃浆,8%的蔗糖,0.5%的复合稳定剂(果胶:CMC=1:1),经85℃、10min保温杀菌后,接入3%的乳酸菌,42℃下培养4 h,最后在4℃～10℃条件下后熟12 h,即可得到优质的核桃酸奶制品.     

玉米酸奶的研制

研究了以鲜乳和玉米为原料生产玉米酸奶的最适宜配方及生产条件。结果表明，将玉米浆与鲜乳以1：2的质量比混合，加入10％的白砂糖，0．20％的稳定剂，0．15％的乳化剂，选用保加利亚乳杆菌和乳酸链球菌，以1：1的比例，4％的接种量，在42℃条件下发酵4h．可得到优质的玉米酸奶。     

核桃酸奶生产工艺条件的研究

核桃酸奶是以核桃浆、牛奶、蔗糖为主要原料,通过调配、杀菌、接种及发酵等工艺制成的一种风味优良、营养丰富的酸奶制品。试验表明,在牛奶中加入25%的核桃浆、8%的蔗糖,经95℃、20min保温杀菌后,接入4%的乳酸菌,42.5℃培养4h,在4℃条件下后熟12h,即可得到优质的核桃酸奶制品。     

凝固型桂圆发酵酸乳的研制

以桂圆肉为原料，添加适量奶粉，经乳酸菌发酵制成一种新型固体酸牛奶。将桂圆肉、砂糖和奶粉按照一定比例混合调配，杀菌后按嗜热链球菌和保加利亚乳杆菌1：1接种，接种量为2％，42℃恒温发酵4h，冷藏24h，即制得营养丰富，富有桂圆风味的凝固型酸奶。     

玉米酸奶加工初探

本文对玉米酸奶的加工进行了初步探讨。结果表明：玉米浆与牛奶按1：2混合,加入10％蔗糖,接入4％Lb：St（1：1）菌种在42℃下发酵6h可得品质较优的玉米酸奶。其最佳复合稳定剂为琼脂：黄原胶：单甘酯=0．2％：0．05％：0．05％。     

基于标准化法评估的牦牛酸奶加工工艺

为优化牦牛酸奶的加工工艺,通过标准化法评估研究了牦牛奶杀菌条件、菌种接种体积分数、发酵温度、后酸化时间对牦牛酸奶品质的影响。结果表明,牦牛乳在90℃下杀菌10 min,添加0.15%混合乳酸菌发酵剂、在43±1℃条件下发酵至凝固,4℃后酸化24 h,制得的牦牛酸奶品质好。     

不同巴氏杀菌条件对酸奶品质的影响

在不同巴氏杀菌温度、时间条件下处理原料乳,以黏度、硬度、乳清析出率、pH值及感官评分为指标,研究巴氏杀菌条件对酸奶及其贮藏期间品质的影响。结果表明：原料乳杀菌在一定范围内加热温度高(高于80℃)、时间较长(大于5min)有利于提高酸奶的黏度、硬度,降低乳清析出率,稳定贮藏期间的质构、pH值及感官特征。在本实验设置的6组原料乳巴氏杀菌条件(A1：60～70℃,30min;A2：70～80℃,20min;A3：80～90℃,15min;A4：90～95℃,10min;A5：95～100℃,5min;A6：121～130℃,10s)中,样品A3和A4的酸奶黏度和凝乳硬度较高,乳清析出率低,口感风味好,且在贮藏期间能保持较好的质构和风味特征。     

瓶装黄酒杀菌条件与风味关系研究

对瓶装黄酒杀菌温度、时间等对酒质、风味的影响作了系统的研究和分析。实验表明：杀菌温度在60℃-65℃，随杀菌时间延长酒质得到改善；当杀菌温度超过70℃时，杀菌时间应控制在1h以内；当75℃时杀菌超过30min，黄酒风味有下降的趋势；80％以上，黄酒风味随杀菌时间延长而变劣。     

白扁豆酸奶的研制

以白扁豆和鲜牛奶为原料，制作白扁豆酸奶。结果表明：白扁豆经100℃烘烤1．5h，再用温水浸泡，打浆后，用中温α-淀粉酶将其中的淀粉降解，得到的白扁豆乳与鲜牛奶以2：10（v／v）混合，加入6％的蔗糖和0．2％的海藻酸丙二醇酯（PGA），接入4％的嗜热链球菌和保加利亚乳杆菌（1：1）混合菌种，在42℃发酵4h，最后放于冰箱（0℃～5℃）中冷藏16h，可制得优质白扁豆酸奶。     

后杀菌技术延长牦牛酸奶保质期技术研究

为延长牦牛酸奶的保质期,研究了63℃/20 min,68℃/10 min和75℃/5 min三种后杀菌工艺对牦牛酸奶贮存期间品质的影响。结果表明,牦牛酸奶在68℃条件下后杀菌10 min,在4℃条件下货架期可达28 d。     

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.     

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     

INFOPRINT 2014 was Successfully Held in Dongguan

Sponsored by Printing and Printing Equipment Industries Association of China （PEIAC） and organized by Print China magazine, the Seventeenth Beijing International Printing Information Conference （INFOPRINT 2014） was successfully held on 11th Dec. 2014 at Dongguan Exhibition International Hotel.