功能性核桃酸奶的初步研究

为获得品质和风味独特的核桃酸奶,采用正交实验设计,分别对核桃乳和牛乳配比量、接种量、牛磺酸添加量进行了研究,结果表明核桃乳与牛乳配比14,接种量4%,5%牛璜酸溶液添加量为1.5‰配方的酸奶品质和风味俱佳.     

桑葚复合酸奶的研制

将桑葚果汁与脱脂牛乳复配,经过酸乳发酵工艺可制备出口感良好、营养丰富并具有多种功能的保健酸奶。经研究,桑葚酸奶的最佳配方为白砂糖添加量4%、桑葚汁含量6%、发酵剂接种量6%、发酵时间6 h。在最佳条件下制得的酸奶感官评分为85.3分,品质、风味、口感俱佳。     

黄秋葵水牛乳酸奶加工工艺及DPPH自由基清除能力研究

将黄秋葵汁添加到水牛乳中,制备具有抗氧化功能的黄秋葵水牛乳酸奶,通过单因素和正交试验,研究秋葵汁添加量、发酵剂添加量、发酵时间及白砂糖添加量对黄秋葵水牛乳酸奶品质的影响。试验结果表明:黄秋葵酸奶的最佳工艺为:黄秋葵汁添加量20%,发酵剂接种量7%,发酵时间4 h,白砂糖添加量7%。在此条件下制备的酸奶口感细腻,风味独特。未经稀释的黄秋葵水牛乳酸奶在贮存15 d时,对DPPH自由基的清除率高达91.2%,远高于对照酸奶,说明黄秋葵有助于提高酸奶的抗氧化能力。     

双蛋白奶的研制及理化指标检测

以燕麦粉和鲜牛乳为主要原料,7%的木糖醇为甜味剂,研制了一种保健型酸奶-凝固型燕麦发酵酸奶。以产品感官质量和稳定性为评价指标,应用正交试验设计,确定了合理的配方和适宜发酵的工艺。结果表明：燕麦酸奶主要原料的最佳配方为：燕麦添加量1.5%、发酵剂接种量5%、发酵温度42℃、发酵时间4h。     

响应面法优化红酒酸奶的制作工艺

该文以红酒和全脂牛乳为主要原料开发一种新型酸奶产品,通过单因素试验分别考察红酒添加量、白砂糖添加量、发酵剂接种量、发酵时间对红酒酸奶感官评分的影响,并利用响应面法对红酒酸奶的制作工艺进行优化。结果表明,红酒酸奶的最佳工艺参数为：红酒添加量7%,白砂糖添加量6%,发酵剂接种量4%,发酵时间7 h。在此工艺条件下发酵的红酒酸奶色泽均匀、组织细腻、酸甜适中,具有红酒和牛乳的营养及风味,产品的综合品质最佳。     

巴河莲藕汁发酵酸奶的研究

以藕汁和鲜牛乳为主要原料,配以蔗糖、稳定剂等,研制出一种具有营养和保健双重功能的藕汁型酸奶。通过正交试验确定最佳配方。结果表明:藕汁添加量5%,蔗糖用量6%,接种量4%,发酵时间4h,可制成质量优良的藕汁型酸奶。     

山黄皮水牛乳酸奶的制备工艺

以水牛乳为主料,加入山黄皮果浆,制成风味独特、营养价值高的黄皮果水牛乳酸奶。通过单因素试验和正交试验确定酸奶的最佳工艺:山黄皮全果浆添加量9%,发酵剂接种量9%,发酵时间4 h,白砂糖添加量8%,发酵温度41℃。由此工艺条件制备的黄皮果牛乳酸奶口感清新,品质最佳。     

深海鱼油保健酸奶的工艺研究

通过向纯鲜牛乳中添加深海鱼油制剂,经乳酸菌发酵,制得一种浅黄色、风味独特的全营养新型酸奶。研究了深海鱼油保健酸奶的加工工艺及配方、产品感官性状、酸度和发酵菌数量等变化。通过4因素3水平正交实验确定各种成分的最佳剂量,确定产品配方为:合格鲜牛乳,白砂糖8%(均为质量分数,下同),复合稳定剂3%,发酵剂接种量3%,深海鱼油2%。     

玉米花粉营养酸奶的研制

以玉米花粉和牛乳为原料,研制出营养全面、具有玉米花粉风味和乳香的保健酸奶。对玉米花粉酸奶的配方和加工工艺进行了研究,得出最佳工艺条件为:牛乳与花粉乳的比例为6:1,加糖量8%,接种量4%,发酵时间6h。     

混合果肉酸奶的研制

在酸奶技术的基础上,将猕猴桃与鲜牛乳的混合液接入乳酸菌发酵。采用单因素实验设计和正交实验设计,用保加利亚乳杆菌和嗜热链球菌混合发酵猕猴桃牛乳混合液,以乳清析出率、酸度和感官质量评定为依据,筛选出产品的最佳配方工艺条件为鲜牛乳81.7%、猕猴桃8%、另加蜂蜜量4%、稳定剂0.32%、发酵接种量3.0%、41℃下发酵6h,而后添加3%的葡萄干、0～4℃下后熟12h。该果肉酸奶的感官评定值可达91～95。     

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.