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。     

苦荞黄酒的工艺研究

以糯米和苦荞麸皮为原料,研究料水比、糖化酶接入量、黄酒酵母接入量、温度、时间等因素对苦荞黄酒糖化和后发酵的影响,通过L_9(3~4)正交试验确定苦荞黄酒工艺的最佳条件,并对成品进行感官评定。试验结果表明:影响苦荞黄酒糖化的因素依次为:料水比﹥糖化温度﹥糖化酶接入量﹥糖化时间,糖化的最佳条件为:料水比3∶5.5∶11.5(g∶g∶g),糖化酶接入量0.25%,糖化温度60℃,糖化时间13h;影响苦荞黄酒后发酵的因素依次为:后发酵温度﹥黄酒酵母接入量﹥料水比﹥后发酵时间,后发酵的最佳工艺条件为:料水比3∶5.5∶11.5(g∶g∶g),黄酒酵母接入量0.2%,后发酵温度40℃,后发酵时间13d。经过最佳糖化和后发酵工艺可获得外观、香气、口味、风格等感官指标达到优级的苦荞黄酒。     

响应面法优化苦荞干黄酒主发酵工艺

以1∶1的苦荞米和糯米为原料,通过单因素试验研究了主发酵过程中发酵时间、酒药质量分数、麦曲质量分数、冲缸加水比、发酵温度对苦荞干黄酒主发酵的影响,并以主发酵乙醇体积分数为响应值,采用响应面法对苦荞干黄酒的主发酵工艺进行了优化。结果表明,酒药质量分数0.6%,麦曲质量分数3.74%,冲缸加水比为1.2 m L/g,发酵温度29.0℃,主发酵时间8 d,在该条件下的乙醇体积分数最高为17.0%(20℃),所得到的产品色香味俱佳,并具有苦荞干黄酒独特的风格。     

黄酒活性干酵母在（麸曲）矩黄酒中的应用及研究

应用黄酒活性干酵母（Ｙ－ＡＤＹ）酿造麸曲甜黄酒，用量０．３％￣０．４％，发酵１２￣１８小时投酒陈酿，总发酵期２０天，出酒率３４０％￣３６０％，成品酒酒行浓郁，口感醇厚，酸甜适口，酒体协调，风格突出，口质接近于传统麦曲甜黄酒。     

黄酒活性干酵母在(麸曲)甜黄酒中的应用及研究

应用黄酒活性干酵母（Ｙ—ＡＤＹ）酿造麸曲甜黄酒，用量０．３‰～０．４‰，发酵１２～１８小时投酒陈酿，总发酵期２０天，出酒率３４０％～３６０％，成品酒酒香浓郁，口感醇厚，酸甜适口，酒体协调，风格突出，品质接近于传统麦曲甜黄酒。     

大小曲混合发酵苦荞酒工艺研究及风味成分分析

对大小曲混合发酵苦荞酒的酿造工艺进行研究,以出酒率、总酸、总酯为指标,结合感官评价,通过单因素及正交实验确定苦荞酒最佳酿造工艺:小曲用量0.9%、高温曲用量2.5%、黄酒用量2%、发酵时间16d。该条件下出酒率为43%,总酸1.1g/L,总酯3.2g/L。经气相色谱及GC-MS分析,共分离鉴定出80种化合物,其中,乙酸乙酯含量1.4g/L,乳酸乙酯含量1.17g/L。与只用小曲对苦荞进行发酵相比,本实验提高出酒率4%,总酸提高57%,总酯提高113%,荞麦香味突出,口感醇和。     

一种荞香型苦荞酒的生产工艺

在深入研究苦荞酒现状的基础上,通过创新工艺来解决苦荞酒荞香和健康功能不明显的问题,创新点主要有:1、通过创新发酵工艺来生产原酒,酿酒原料由单一的苦荞变成苦荞、糯米、大米;发酵用曲由小曲或黄酒曲变成糖化酶、黄酒酵母、荞香专用米曲;取酒工艺由小曲酒蒸馏或黄酒过滤变成分型发酵、串蒸取酒;2、提出不通过发酵,直接对苦荞有效成分提取工艺的研究,提取出具有一定保健功能的荞香舒适的苦荞汁,并添加少量中药提取液,使得苦荞的有效成分发挥更充分;3、把发酵取得的原酒和提取的苦荞、中药汁合理调配,并创新澄清方式,经贮存老熟后制得一种口感均衡、风味俱佳新型产品。     

双宝酒的酿制

双宝酒是以糯米、人参、蜂王浆为原料,采用甜型黄酒的 传统发酵工艺精心酿制并勾兑而成的保健、营养型黄酒,不但具有甜型黄酒固有的风味特点,并富含16种氨基酸及人参皂甙、Vc和钙、锌等多种微量元素。     

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。     

低度甜型菠萝香蕉复合果酒酿造工艺优化

实验以成熟度良好的菠萝和香蕉为主要原料,通过单因素和正交实验进行菠萝与香蕉用量配比、发酵浸渍方式、初始发酵糖度及最终残糖对低度甜型菠萝香蕉复合果酒品质影响的研究。确定了最佳工艺条件为原料菠萝与香蕉质量比为2∶1、初始发酵糖度210 g/L、保留残糖90 g/L及无浸渍发酵,最终酒度为7.1%vol。此条件下所酿低度甜型菠萝香蕉果酒酒体呈浅金黄色,澄清有光泽,果香较典型,酒体协调,余味良好。     

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.