豆奶中加入苦瓜汁生产酸豆奶的工艺研究

以豆奶和苦瓜汁为原料,研究了用保加利亚乳杆菌和嗜热链球菌为发酵剂进行乳酸发酵制作酸豆奶的工艺。经正交试验得到的最佳工艺条件为:在豆水比1∶10的溶液中,加入10%脱脂乳,20%苦瓜汁,8%蔗糖,0.2%复合豆奶稳定剂,接种量4%,41℃下发酵6h,可制得色泽均一、组织细腻、酸甜爽口、香味协调的苦瓜酸豆奶。     

紫背天葵色素对酸豆奶发酵进程的影响

大豆为主要原料,将紫背天葵提取色素添加到豆奶中,保加利亚乳杆菌和嗜热链球菌等比混合为发酵剂进行乳酸发酵制酸豆奶。通过单因素试验,探讨紫背天葵色素对酸豆奶发酵pH、乳酸菌数、酸豆奶品质及保藏性能的影响。结果表明,豆水质量比为1∶10的豆奶中添加6%紫背天葵色素提取液,6%蔗糖和2%葡萄糖,85℃杀菌30 min后冷却至43℃,接种3%乳酸菌发酵6 h,紫背天葵色素的添加有利于乳酸菌的生长繁殖,加速酸豆奶的发酵进程,缩短发酵时间,能改善产品的组织状态,提高产品的保藏性能。制得的酸豆奶色泽鲜红,组织细腻,凝固性好,滋味和气味优良,营养价值高。     

无腥大豆加工酸豆奶工艺条件的研究

试验利用无腥味大豆为主要原料生产酸豆奶 ,通过正交试验确定了无腥大豆加工酸豆奶的最佳工艺条件。结果表明 ,大豆与水之比为 1∶10 ,乳酸菌数为 16× 10 4 个 /mL ,添加葡萄糖 5 %、蔗糖 4 %、牛奶 30 %和稳定剂 0 .2 % ,在 4 0℃发酵 5h ,可制得色泽洁白 ,组织细腻 ,香味浓郁 ,口感好 ,无豆腥味 ,营养价值高的酸豆奶     

银耳多糖对豆奶发酵进程的影响

大豆中含有人体所必需的生理活性物质，而银耳多糖又有药用价值，如果将二者结合起来，对人们的身体健康将会有很大的帮助。研究银耳多糖对豆奶发酵影响时发现豆奶中添加10%银耳多糖，3%蔗糖、15%纯牛奶和25%的酸牛奶，在40-42℃下发酵7h，制得的酸豆奶不仅营养价值高，风味好，而且组织细腻、凝固性好。     

两歧双歧杆菌发酵橙汁酸豆奶的研究

本文尝试研究豆奶中两歧双歧杆菌的生长情况,以得到风味良好的发酵产品.以大豆与水1∶8的比例制取豆奶,添加一定量的橙汁,并加入两歧双歧杆菌进行发酵.考察了培养温度、橙汁添加量、接种量等因素对产品pH值和活菌教的影响,并在此基础上进行正交试验优化.正交试验结果表明,培养温度为39℃、接种量为5％、橙汁添加量为10％,18 ...     

紫背天葵酸豆奶的研制

以紫背天葵和无腥味大豆为主要原料,对紫背天葵酸豆奶的发酵工艺进行了研究。通过单因素和正交试验,得出该产品的最佳生产工艺条件为:紫背天葵在50℃保温处理50 min后,水中加入200 mg/LZn~(2+),1.5 g/L Ca(OH)_2,90℃条件下热烫3 min,加2倍水打浆得黏稠的紫背天葵汁;利用紫背天葵汁良好的持水性和黏稠性,代替人工合成稳定剂添加到豆水质量比1:8的豆奶中,加入量为35%,同时加入6%蔗糖和2%葡萄糖,接种4%等比混合的保加利亚乳杆菌和嗜热链球菌,42℃发酵4 h,可制得色泽良好、组织均匀细腻、稳定性好、酸甜爽口、兼有紫背天葵和酸豆奶两者的营养、保健功能于一体的紫背天葵酸豆奶。     

黑木耳乳酸发酵酸豆奶的研制

以黑木耳和大豆为主要原料,利用乳酸发酵,制得具有黑木耳营养价值和大豆有益成分的黑木耳乳酸发酵酸豆奶。运用正交试验探讨了黑木耳汁的制备、豆浆制备时的豆水比、黑木耳酸豆奶乳酸发酵和调配工艺条件及其复配稳定剂的选择。确定了最佳的工艺条件,即黑木耳汁制备的条件为浸泡时间60min,浸泡温度70℃,打浆时料水比1∶100。豆浆制备时打浆时豆水比1∶10;调配工艺中黑木耳汁与豆浆比例为40∶60,发酵时间5h,发酵剂接菌量4%,白砂糖7%;稳定剂配方明胶0.06%,羧甲基纤维素0.15%,海藻酸钠0.05%。     

果味黑豆酸奶的研制

将芒果、菠萝果汁按1∶1混合制成混合果汁,在黑豆浆中加入一定比例的混合果汁进行乳酸菌发酵,制成果味黑豆酸奶。试验采用L9(34)正交试验法确定加工工艺参数,筛选出最优组合。研究结果表明以黑豆浆为基料,添加10%混合果汁、7%蔗糖和4%发酵剂(StLb=2∶1),在40℃发酵4h,制得的酸豆奶色、香、味甚佳,具有营养保健功能。     

一种替代牛奶的发酵型酸奶-发酵酸豆奶的研制

以植物蛋白源大豆为主要原料完全或部分替代动物蛋白源牛奶,经调配、均质、杀菌、发酵等工艺,考察了泡豆时间、菌种发酵时间及大豆和奶粉的质量比等因素对产品口感和风味的影响.通过正交实验对发酵酸豆奶进行工艺优化.得到了最佳工艺参数:泡豆时间为8h、发酵时间为6h、大豆和奶粉的质量比例为3:7、白砂糖9%、乳糖3%、山梨酸钾0.03%、稳定剂RD 0.4%.在此工艺下制得的发酵酸豆奶色泽和口感俱佳,稳定性较高.     

芹菜汁酸豆奶的研制

探讨了芹菜汁酸豆奶的工艺,并采用正交试验确定芹菜汁酸豆奶的最佳发酵条件,结果为：保加利亚乳杆菌（Lactobacillus bulgaricus）嗜热链球菌（Streptococcus thermophilus）=1：1,接种量为4%,芹菜汁添加量为10%,脱脂乳粉的添加量10%,发酵温度40℃,发酵时间5h.     

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