强化窖泥贴附结构,提高曲酒产质量

强化窖泥贴附结构，提高曲酒产质量魏国（山东泰安酿酒总厂生产科技处；２７１０００）“百年老窖出好酒”，浓香型曲酒生产离不开老窖这一特殊的发酵容器，窖泥恰恰又是老窖的根本，由于长期连续的酿酒发酵中产生的有机酸、酯、醛、醇类及ＣＯ２等浸润深入窖泥中，逐渐富...     

窖泥中无机及微量元素对酒质的影响——窖泥成分对酒质的影响(第二报)

浓香型大曲酒以泥窖为基础,窖泥熟化程度直接影响曲酒的质量。因此,百年老窖常生产名优曲酒。六十年代我所在研究人工培养窖泥、新窖老熟取得成功后,现已普遍推广使     

利用液体超级复合己酸菌培养人工老窖泥

采用洛阳可可生物科技有限公司生产的液体超级复合己酸菌进行扩大培养人工老窖泥,对现有窖池进行部分改造,并对改造后的效果进行比较分析.结果表明,"液体超级复合己酸菌"在浓香型曲酒中生产应用,可缩短老化窖泥的复壮时间,其产浓香型曲酒的己酸乙酯含量明显提高.     

金种子人工窖泥在浓香型白酒生产中的应用分析与探讨

窖泥及窖池养护在浓香型白酒酿造生产过程中起到重要作用,其主体香味物质己酸乙酯主要来源于老窖泥中己酸菌的代谢产物;因此,窖泥的优劣是影响浓香型原酒质量的重要因素之一。设置窖泥试验组(新配方)、窖泥对照组(原配方)和参照组(正常老窖池)等3个比较组,通过转排、二排生产期间人工窖泥应用于窖池培养,考察对发酵产酒的影响等,探究了两种不同方案培养的人工窖泥对金种子浓香型原酒产质量的影响。试验结果表明,窖泥试验组、窖泥对照组的酿酒效果略有差异,试验组窖池的表现优于参照组窖池。     

浓香型大曲酒传统操作法(四)

黄水对浓香型曲酒的香味成分的形成作用甚大,但过多则影响酒质,必须滴窖勤舀,避免黄水味从母糟带入酒中。滴窖时间一般要求12h以上,每窖最少舀4～6次。加醅减糠、回酒发酵,是保证出酒率和稳定产品质量的有效措施。加强窖池的管理,严密封窖、清窖。培养窖泥最好使用本厂老窖泥或名优酒厂选育的混合菌株(窖泥功能菌)作种子。夹泥(加泥)发酵,可明显提高酒质,但泥的质量是关键。双轮底发酵是提高产品质量的极其有效措施,生产中要遵循其规律,严格操作。(丹妮)     

关于己酸菌的培养及其应用

关于己酸菌的培养及其应用在浓香型大曲酒中，发酵窖越老，产酒质量越好，老窖产好酒，号称３００年老窖，这是传统工艺的经验总结。为了揭示老窖出佳酿的奥秘，自６０年代始，我国开展了浓香型酒与窖泥微生物的关系研究，发现老窖泥中富集有多种厌氧功能菌、嫌气性梭状芽...     

培养人工老窖生产浓香型调味酒

培养人工老窖生产浓香型调味酒,其关键点为:窖泥、窖泥质量、窖泥设计、窖泥搭挂、窖泥的培养配方、窖泥感官、理化标准要合理;酒体设计和工艺条件方面:控制好发酵时间,把握合理的水分,母糟残余淀粉合理,温度适宜,辅料合理,及正确踩窖.提高浓香型调味酒质量的主要措施为稳定发酵时间、严格工艺工序和量质摘酒等.     

北方窖泥的培养与应用

窖泥是浓香型白酒的基础。人工老窖技术推进了浓香型白酒的发展。北方人工老窖在长期使用中出现窖泥功能退化现象,其原因与窖泥配方、培养方法、窖池养护有直接关系。针对北方气候特征,采用适宜、科学的方法生产人工窖泥,应用于老窖的改造,结果表明,培养的新窖泥对提高酒质和产量效果明显。     

提高浓香型白酒主体香的一个途径

我省浓香型白酒数量较多,各兄弟厂先后为提高其主体香作了许多研究工作,渚如行之有效的窖壁浇注己酸培养液、增大用曲量、延长发酵期等,借以提高己酸乙酯主体香成分。根据我厂情况,我们对提高己酸乙酯为主的酯类含量的问题进行了一些探讨。一、窖泥对比分析泸州老窖的工艺特征是混蒸混烧、肥泥老窖和万年续糟。由表1看出,窖泥的有效成分及微生物群总细菌数远远超过本厂,是本厂质量低于泸州曲酒的主要     

浓香型大曲酒窖泥概述

窖泥与浓香型大曲酒生产关系十分密切,一定程度上讲,窖泥质量的优劣决定着浓香型大曲酒质量的高低。本文通过对不同时期主要窖泥培养方法的阐述,分析其存在的主要问题,即窖泥易出现的老化现象:池壁部分起碱,板结发硬,白色结晶体析出,异杂味出现等。以此来阐述要实现千年老窖,保证窖泥质量,在正常科学发酵工艺基础上,一方面优化窖泥培养,另一方面科学合理进行窖泥养护,才能最终实现浓香型大曲酒质量的稳中提升。     

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