葛根黄酒发酵工艺研究

以荆门地区糯米和葛根粉为原料,利用麦曲和黄酒活性干酵母进行发酵。选取葛根与糯米质量比、料水比、麦曲添加量、黄酒酵母添加量为主要影响因素,以酒精度、黄酮含量及感官评定为测量指标,采用单因素试验和正交试验对葛根黄酒发酵工艺进行优化。结果表明,葛根黄酒最佳发酵条件为:葛根与糯米质量比为1∶3.3,料水比为1∶2(g/m L),麦曲添加量为8%,黄酒酵母添加量为0.08%。     

生料发酵生产黄酒的工艺研究

将大米直接投入水中,加入淀粉水解酶、黄酒麦曲、干酵母,生料发酵酿制黄酒.研究料水比、发酵起始pH、酶制荆和干酵母用量等因素对生料发酵结果的影响.结果表明,生料发酵生产黄酒的工艺务件为:起始pH自然,料水比1:2.4,水解淀粉酶用量2.5‰、干酵母添加量2.0‰.该生料发酵生产黄酒工艺与传统原料蒸煮工艺相比,简化了生产工序,降低了能耗,大大减少了污水排放,产品的氨基酸态氮、无糖固形物指标有较大提高,口感清爽,陈化后香气纯正、优雅.     

小米黄酒酿造工艺的研制及优化

采用小米为原料酿制黄酒以提升黄酒营养价值并提高小米经济价值。通过对小米黄酒理化指标测定并综合感官评价,对小米黄酒发酵酵母进行筛选,确定安琪黄酒高活性干酵母为最适菌种。根据单因素试验以及响应面试验,确定实际可行且较优的小米黄酒浸米条件:加水量150%、20℃浸米36 h;糖化条件:酒曲添加量0.6%、30℃糖化60 h;最佳发酵工艺条件:安琪黄酒高活性干酵母、酵母添加量0.22%、32℃发酵5 d,酒精度达11. 3%vol。在最优的工艺条件下酿造的小米黄酒各阶段相应指标与响应面所预测结果基本一致。     

黄酒活性干酵母酿造乌衣红曲黄酒的研究

应用黄酒活性干酵母和糖化酶替代50％乌衣红曲酿造黄酒的试验结果表明:粮曲出酒率从258％提高到272.4％,吨黄酒节粮19kg,吨黄酒节支27.90元,且发酵正常,质量提高。同时表明,黄酒活性干酵母较酒精活性干酵母适宜于黄酒发酵,能进一步改善乌衣红曲黄酒风味。     

中国优秀的酒曲种供应基地

<正>企业的竞争是科学技术进步的竞争我们专注于酒曲研究贵州酒曲历史悠久源远流长向全国大中小酿酒企业推荐:国家科技成果奖、贵州省科学技术进步一等奖推广项目Q303根霉种曲(生物科技)黄酒专用曲高效酒曲根霉酒曲生料酒曲甜酒曲生香活性干酵母(品质领先)产品经过贵州茅台镇五星酒厂、浙江宁波天泉黄酒酿造公司、浙江杭州西湖黄酒酿造厂、湖南酒鬼酒有限公司、云南香格里拉藏秘有限公司、遵义仙台酒业有限公司、贵州金沙     

黄酒活性干酵母酿造乌衣红曲黄酒的研究

应用黄酒活性干酵母和糖化酶替代５０％的乌衣红曲酿造黄酒的试验结果表明：粮曲出酒率从２５８％提高到２７２．４％，吨黄酒节粮１９ｋｇ，吨黄酒节支２９．９０元，且发酵正常，质量提高。同时表明，黄酒活性干酵母较酒精活性干酵母适宜于黄酒发酵，能进一步改善乌衣红曲黄酒风味。     

液态发酵法酿造荞麦酒发酵工艺研究

通过对照试验确定菌种、原料配比和原料处理方法,以单因素和正交试验得出液态发酵法酿造荞麦酒的最佳发酵条件。研究表明：经发芽处理后的原料可发酵性明显增强,产酒黄酮含量有显著增加;黄酒活性干酵母发酵能力强于其他几种菌种;甜荞:苦荞为3:2、料水比为 1:2.5、发酵温度 30 ℃、发酵时间 7 d、活性干酵母添加量为 0.5 %为最佳的发酵工艺条件。     

桑葚保健黄酒的研究

桑葚经过打浆、灭酶、护色制得桑葚浆,糯米浸泡后蒸煮摊凉,加入一定比例的桑葚浆,以黄酒活性干酵母、麦曲为糖化发酵剂,采用摊饭法生产工艺制得一种天然的具有营养保健功能的新型桑葚黄酒。试验结果表明,桑葚保健黄酒的最佳发酵条件为:桑葚浆与糯米质量比为1︰2,活性干酵母添加量质量分数为0.2%,麦曲添加量质量分数为10%,糖化发酵温度25℃,主发酵时间为7 d。     

生料法在玉米黄酒中的应用

简述了生料液态法酿造玉米黄酒的全过程，糖化发酵时：加水量为250％，曲霉的加入量为10％，根霉曲加入量为10％，黄酒活性干酵母的加入量为0．4％时，陈酿时采用高低温间隔的方法，既提高了原料利用率，又缩短了黄酒酿造时间，并且本法在酿造过程中添加10％炒玉米和少量玉米糖浆，取得了较好的效果。     

怀山药黄酒酿造工艺

以怀山药为主要原料,大米为辅料,用纯种米曲,黄酒活性干酵母为糖化发酵剂,采用半固态发酵工艺酿造怀山药黄酒。其最佳原料配比为:怀山药51%,大米34%,料水比为1∶1.2;糖化发酵剂用量为:米曲15%,干酵母0.8‰;发酵温度20℃,主发酵时间7 d,后发酵时间15~30 d;怀山药黄酒活性炭最佳脱色条件为:活性炭用量3‰,温度为40℃,时间为8 h。最后得到澄清透明,呈微黄色,乙醇体积分数为15.0%的怀山药黄酒。     

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