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1.
王同阳  葛邦国 《食品科技》2007,32(8):205-208
研究了蜂蜜、柿子汁发酵饮料的制作工艺及酵母菌、醋酸菌接种量、醋酸发酵温度和发酵时间对产品感官质量的影响。结果表明:含糖量25%的蜂蜜、柿子汁为原料,接种3%的酵母菌种子液,28℃发酵4d,然后接种5%的醋酸菌种子液,32℃条件下发酵6d得到的发酵饮料,具有蜂蜜和柿果的清香味,质量和口感最好。  相似文献   

2.
蜂蜜、枸杞汁醋酸发酵饮料的研究   总被引:2,自引:0,他引:2  
研究了蜂蜜、枸杞醋酸发酵饮料的制作工艺及酵母菌、醋酸菌接种量、发酵温度和发酵时间对产品感官质量和发酵速度的影响。结果表明:蜂蜜含量为40%,枸杞汁含量为5%的蜂蜜混合液为主要原料,接种2%的酵母菌种子液,28℃发酵4d。再接种5%的醋酸菌种子液,32℃条件下发酵6d得到的醋酸饮料,具有蜂蜜和枸杞清香味。  相似文献   

3.
葡萄果醋发酵饮料工艺条件的研究   总被引:1,自引:0,他引:1  
以玉米、麸皮为主要原料,经酒精发酵后加入葡萄皮渣进行醋酸发酵制得葡萄果醋,再经调配,制成风味独特的葡萄果醋饮料.通过单因素实验、正交试验,优化了工艺条件和配方.结果表明,以玉米、麸皮汁为发酵基料(基料糖含量为12°Bx,pH4.5)的酒精发酵条件为:酵母接种量10%、发酵温度30℃,经酒精发酵3d,酒精体积分数达到6%时进入醋酸发酵;醋酸发酵条件为:葡萄皮渣与玉米和麸皮的质量比为1∶2、糖含量3°Bx、醋酸菌接种量10%、发酵温度30℃、发酵5d.葡萄果醋发酵饮料配方为:葡萄果醋12%、柠檬酸0.2%、蔗糖10%.  相似文献   

4.
以新疆干骏枣为原料,采用红茶菌(酿酒酵母菌Saccharomy cescerevisiae Hansen、纹膜醋酸杆菌Acetobacter aceti、植物乳酸杆菌Lactobacilha plantarum)为菌种,经发酵研制红枣红茶菌发酵饮料。研究了红枣汁添加量、红茶菌接种比例、发酵时间、温度和供氧量等因素对红枣红茶菌发酵饮料发酵工艺的影响,确定其最佳工艺为:红茶菌接种量5%(乳酸菌:醋酸菌:酵母菌=2:2:1)、枣水比1:3.5、发酵时间4d、温度30℃,供氧方式为10层左右的纱布封口震荡培养。该发酵饮料酸甜爽口,枣香醇厚。  相似文献   

5.
李新社  何红梅 《酿酒》2007,34(3):81-82
以柑子汁为原料,经过酒精发酵和醋酸发酵生产醋饮料.运用正交实验确定,酒精发酵的最佳工艺条件为:酵母驯化种接种量为10%,加糖量3%,发酵温度25℃,发酵时间为4d;醋酸发酵的工艺条件为:醋酸菌接种量为15%,初始酒精度7%Vol,发酵温度33℃,发酵时间为6d.  相似文献   

6.
为开发苦瓜保健醋酸饮料,对苦瓜醋酸饮料的发酵工艺参数和口味调配进行了系统的研究.结果表明:酒精发酵的最适条件为发酵温度32℃,酵母接种量6%,可溶性固形物含量22%,发酵时间4d;醋酸发酵的最适条件为:温度34℃,接种量10%,时间5d:成品果醋中原醋、蜂蜜、苦瓜汁的含量分别为12%、3%、50%.  相似文献   

7.
以土豆为原料,利用酵母菌、乳酸菌混合后发酵制成土豆汁饮料.经试验表明,最佳工艺条件为:接种菌配比1:1.5、接种量0.75%、发酵温度35℃、发酵时间48h.添加8%蔗糖、0.2%的混合稳定剂(0.1%黄原胶、0.1%CMC-Na)可制得酸甜可口的土豆汁饮料.  相似文献   

8.
多菌种混合发酵黑米饮料的研究   总被引:3,自引:1,他引:3  
研究了以黑米为原料,通过蒸煮、糖化制得黑米汁,再接入酵母菌、乳酸菌、醋酸菌共同发酵所得的一种新型发酵无醇饮料。试验表明,黑米汁发酵的最佳糖度为12°Bx,pH为6.5,接入菌种的比例为酵母菌∶乳酸菌∶醋酸菌=0.5∶1∶2,接种量为0.1g/L,发酵时间为8~9d,发酵温度为33℃。所得发酵液经调配、杀菌便制成了黑米发酵无醇饮料。  相似文献   

9.
将仙人掌预处理、榨汁、制取仙人掌汁,以实用酒精调配的仙人掌汁为发酵原液,采用醋酸菌进行醋酸发酵。用正交试验设计出最佳的发酵工艺条件。生产的仙人掌醋,经品尝、勾调出含营养和保健功能的醋饮料。  相似文献   

10.
以火棘汁为原料,经过酒精发酵和醋酸发酵生产醋饮料。运用正交实验确定酒精发酵的工艺条件为酵母驯化种接种量10%,加糖量3%,发酵温度28℃,发酵时间5d;醋酸发酵的工艺条件为醋酸菌接种量10%,初始酒精度6%,发酵温度33℃,发酵时间7d。  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

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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.  相似文献   

18.
<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  相似文献   

19.
《印刷工业》2014,(11):95-95
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%.  相似文献   

20.
《印刷工业》2014,(8):103-103
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  相似文献   

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