胡萝卜苹果复合果醋的研究

以苹果、胡萝卜为原料经过酒精发酵和醋酸发酵,制得了胡萝卜、苹果复合果醋。通过对影响酒精发酵的接种量、温度、时间进行研究,结果表明酒精发酵最佳工艺条件为接种量为5%,温度为30℃,发酵时间6 d;对醋酸发酵的初始酒精度、接种量、温度、pH研究表明,醋酸发酵最佳工艺条件为初始酒精度为8(%,体积分数),接种量为10%,温度在30℃,pH为3.5,发酵时间14 d。     

南果梨果醋发酵工艺研究

以南果梨为原料,采用液态发酵工艺,分别进行酒精发酵、醋酸液体摇瓶发酵、下胶澄清等方法制成南果梨果醋.试验结果表明,酒精发酵的适宜条件为活性干酵母的接种量0.10%,酒精发酵初始糖量16%,发酵时间2d.醋酸发酵适宜的条件为发酵温度30℃,醋酸菌接种量10%,初始酒精度6%vol.     

发酵型柑子全汁醋饮料的研制

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.     

苹果梨果醋饮料的研制

以苹果梨为原料,经过酒精发酵、醋酸发酵和调配等工艺,研制出苹果梨果醋饮料.通过正交试验确定酒精发酵的工艺条件为:发酵时间6d、发酵温度22℃、发酵液pH4.5;醋酸发酵的工艺条件为:pH4.5,发酵温度30℃、发酵时间5d、醋酸菌接种量8%;果醋饮料的配方为:果醋原液添加量12%、果醋液含糖量12%、食盐添加量0.5%.     

苹果果醋加工过程的发酵工艺研究

运用正交试验方法对苹果果醋加工工艺中粟酒裂殖酵母降酸、酒精发酵及醋酸发酵等方面进行研究.结果表明,生物降酸最佳条件:温度28℃,发酵时间3 d,粟酒裂殖酵母接种量为5%;酒精发酵最佳条件:温度26℃,发酵时间7 d,酿酒酵母接种量为5%;醋酸发酵最佳条件:初始酒精度7%,发酵时间20 d,醋酸菌接种量10%,发酵温度为32℃.     

发酵型火棘醋饮料的研究

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。     

苹果梨果醋饮料的研制 苹果梨果醋饮料的研制

以苹果梨为原料,经过酒精发酵、醋酸发酵和调配等工艺,研制出苹果梨果醋饮料。通过正交试验确定酒精发酵的工艺条件为：发酵时间6d、发酵温度22℃、发酵液pH4.5;醋酸发酵的工艺条件为：pH4.5,发酵温度30℃、发酵时间5d、醋酸菌接种量8%;果醋饮料的配方为：果醋原液添加量12%、果醋液含糖量12%、食盐添加量0.5%。     

苦瓜醋酸发酵饮料的工艺研究

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%.     

生料固态发酵制醋新工艺的研究

采用生料固态酒精发酵和固态醋酸发酵两步法酿醋,考察了水料比、酒精发酵温度、酒曲用量对固态酒精发酵的影响,初始酒精度、醋酸发酵温度、醋酸菌接种量对固态醋酸发酵的影响,通过正交试验,得到了生料酿醋的最佳工艺参数:生料固态酒精发酵阶段:水料比例1:3,发酵温度30℃,酒曲用量为6%,发酵时间为5 d;固态醋酸发酵阶段:酒精度为7.0%,发酵温度为34℃,醋酸菌接种量为6%,发酵时间为15 d.通过与传统酿醋方法的比较可知生料固态酿醋可有效的节约能源,降低劳动强度,简化工艺流程.     

海带猕猴桃复合果醋的工艺研究

以海带、猕猴桃为主要原料,经脱腥试验、酒精发酵,醋酸发酵后,制得复合果醋。通过正交试验,确定了在pH4.5下进行醋酸发酵的最佳工艺条件为：发酵液酒精含量为6%,醋酸菌的接种量为10%,发酵温度为30℃,发酵时间为12d.     

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