木瓜胡萝卜芸豆酸奶的研制

研究以木瓜、胡萝卜、芸豆等为主要原料制备凝固型酸奶的工艺,通过正交试验L9(34)选出产品配方和发酵工艺。结果表明:在牛乳中添加4%木瓜、4%胡萝卜、4%芸豆、1%变性淀粉、0.2%黄原胶、8%蔗糖,杀菌冷却后投入嗜热乳链球菌、保加利亚乳杆菌按一定的比例的混合发酵菌种,接种量2%,在42℃发酵4h,最后在0～4℃下后酵12h,制得的木瓜胡萝卜芸豆酸奶营养丰富、口感细腻。     

莴笋木瓜菠萝酸奶的研制

研究以莴笋、木瓜、菠萝等为主要原料制备凝固型酸奶的工艺,通过L9(34)正交试验优选出产品配方和发酵工艺。试验结果表明:在牛乳中添加6%莴笋、6%木瓜、6%菠萝、8%蔗糖、1%变性淀粉、0.2%黄原胶,杀菌冷却后投入嗜热乳链球菌、保加利亚乳杆菌和双歧杆菌按一定的比例的混合发酵种,接种量2%,在42℃发酵4 h,最后在0～4℃下后酵12 h,制得的莴笋木瓜菠萝酸奶营养丰富、口感细腻。     

黄桃木瓜火龙果酸奶的研制

以黄桃、木瓜、火龙果和和鲜牛奶为主要加工原料,经乳酸菌发酵制备凝固型酸奶,在确定了牛乳中添加4%黄桃丁、4%木瓜丁、4%火龙果丁,8%蔗糖,0.2%黄原胶的基础上,杀菌冷却后投入嗜热乳链球菌、保加利亚乳杆菌的比例为1∶1的混合菌发酵,通过正交实验L9(33)优选出黄桃木瓜火龙果酸奶的最佳发酵工艺条件为接种量为3%,发酵时间为4 h,发酵温度为42℃。     

凝固型芒果粒水牛酸奶工艺研究及配方优化

以水牛鲜乳为主要原料,经保加利亚乳杆菌、嗜热链球菌混合发酵,再添加芒果粒生产凝固型水牛酸奶。对凝固型芒果粒水牛酸奶生产工艺进行研究并对相关参数进行优化,筛选出最佳的工艺条件:蔗糖添加量为8%,发酵时间8h,发酵温度44℃,芒果添加量6%。     

草莓蜂蜜核桃凝固型酸奶的研制

探索凝固型草莓蜂蜜核桃酸奶的最佳工艺条件。以草莓、蜂蜜、核桃、鲜奶等为主要原料,白砂糖、稳定剂为辅料,保加利亚乳杆菌和唾液链球菌为发酵剂制备凝固型酸奶的工艺。通过正交试验确定产品的最佳配方:草莓蜂蜜核桃比例为1∶2∶1,接种量2%,白砂糖6%,发酵时间4 h,发酵温度为42℃。产品酸甜适口,风味独特,营养丰富,具有保健功能。     

牡蛎木瓜酸奶的研制

以牡蛎、木瓜、牛奶为主要原料,利用保加利亚乳杆菌(Lactobacillus bulgaricus)、嗜热链球菌(Streptococcus Thermophilus)和干酪乳杆菌(Lactobacillus casei)进行发酵,研制出牡蛎木瓜酸奶。通过实验确定牡蛎蛋白的提取条件:牡蛎与水按1∶1比例混合后在100℃恒温90min,木瓜果肉与水的榨汁比例为2∶1。牡蛎木瓜酸奶配方为牡蛎提取液与牛奶按7∶3比例混合,添加木瓜汁12g/100g,蔗糖4g/100g,蔗糖脂肪酸酯0.1g/100g,接种8mL/100mL酸奶,在42℃发酵6-7h。此酸奶不仅具有牡蛎特有的营养,还伴随着木瓜的淡淡清香。     

凝固型紫红薯酸奶制备工艺的研究

以紫红薯、脱脂奶粉和白糖为原料,采用保加利亚乳杆菌和嗜热链球菌发酵研制凝固型紫红薯酸奶.通过单因素试验验和正交试验优化,确定了凝固型紫红薯酸奶的制备工艺.试验表明,最佳紫红薯酸奶发酵条件为紫红薯与水按2:8的质量比、8%白砂糖、接种量4%及发酵时间6h,可生产出富含花青素的凝固型紫红薯酸奶.     

黑木耳多糖凝固型酸奶发酵工艺优化

以黑木耳多糖(Auricularia auricular polysaccharide,AAP)和纯牛奶为原料,嗜热链球菌、保加利亚乳杆菌和干酪乳杆菌组成的混合菌为发酵剂,研究AAP凝固型酸奶的最佳发酵工艺。以感官评价为指标,单因素实验探究蔗糖添加量、AAP添加量、明胶添加量、发酵时间、发酵温度、发酵剂接种量对AAP凝固型酸奶的影响,进一步采用响应面试验设计对AAP凝固型酸奶的发酵工艺进行优化,并对其酸奶品质进行评价。结果表明:AAP固体酸奶的最佳发酵工艺参数为0.33%明胶、7.0%蔗糖、3.0%发酵剂、0.1% AAP、发酵时间6.9 h、发酵温度42℃。在此最优工艺下进行验证实验,得到的AAP凝固型酸奶的感官评分为(9.30±0.08)分,与预测值吻合;将其与普通酸奶的感官评分(8.83±0.12)分、持水力(63.83%±2.69%)和质构特性比较,AAP酸奶的持水力(72.14%±3.58%)和质构特性显著提高,感官评分更优;此外,AAP酸奶的游离氨基酸和胞外粗多糖显著(P<0.05)升高,脂肪含量(2.35±0.25 g/100 g)显著(P<0.05)低于普通酸奶(4.16±0.39 g/100 g),具有更高的营养价值和保健功效。因此,AAP凝固型酸奶具备开发成为一种新型功能性酸奶的潜力。     

益生菌酸奶的工艺研究

以保加利亚乳杆菌(Lb)、嗜热链球菌(St)、干酪乳杆菌(Lc)、罗依氏乳杆菌(Lr)混合菌发酵,得到益生菌酸奶.正交结果表明,干酪乳杆菌、罗依氏乳杆菌可以应用于酸奶发酵,发酵工艺为:保加利亚乳杆菌:嗜热链球菌:干酪乳杆菌:罗依氏乳杆菌为3:3:2:2,发酵温度39℃,接种量0.25%(DVS),加糖量8%,凝乳时间5h.     

红汁乳菇酸奶发酵条件优化研究

研究以红汁乳菇发酵液和鲜牛奶为原料,用保加利亚乳杆菌和嗜热链球茵为发酵剂进行乳酸发酵,L9(34)试验结果表明:红汁乳菇菌丝体发酵液25%、鲜牛乳75%、蔗糖9%、接种量3%,采用酸奶制作工艺,在42℃条件发酵4h,生产出具有菇味清香、酸甜适口、凝乳均匀、色泽淡黄的凝固型红汁乳菇酸奶.     

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.