枇杷叶蛹虫草黄酒的研究与开发

以糯米为主料,枇杷叶,蛹虫草培养基作为辅料采用全液态化黄酒生产工艺酿造枇杷叶蛹虫草黄酒.利用单因素试验、正交试验分析了枇杷叶蛹虫草黄酒发酵过程中还原糖以及酒精含量的变化,得到最佳酿造工艺参数:枇杷叶,蛹虫草培养基与糯米的最佳配比为3∶1:16,酵母接种量为0.2％,发酵最佳时间为15d,酒精发酵时,前期32℃通风培养,后期28℃静置培养,此黄酒具有枇杷叶与蛹虫草的双重保健作用.     

利用蛹虫草培养残基酿制保健型发酵酒的工艺研究

以采收完子实体后的新鲜蛹虫草固体培养残基为主要原料,采用酒饼发酵法酿制工艺,通过对发酵过程中的酒饼用量、总醪加水量以及发酵温度这三个主要工艺参数进行优化研究,结果表明,酒饼用量为0.5%、总醪加水量为3倍、发酵温度为23℃时可酿制出具有独特虫草风味的保健型发酵酒.     

黄酒酸败控制措施的研究

本文以糙糯米为原料,探讨黄酒在培菌和主酵阶段酸败控制的关键因素,优化黄酒工艺参数。利用单一因素分析法和正交分析法研究了醪液酸败的影响因素及控制方法。综合分析,确定在培菌和主酵阶段控制黄酒酸败的最优工艺参数如下:酒曲接种量为0.40%、培菌温度与主酵温度均为28℃~31℃、糖化酶添加量为0.06%、主酵加水量为80%。     

大米主料蛹虫草固体发酵生产纤溶酶的研究

以大米为主要原料,通过固态发酵的方法生产蛹虫草纤溶酶。运用单因素试验初步优化发酵的培养基组成及培养条件,用正交试验方法对蛹虫草固态发酵的无机盐添加量进行了细致探索。结果表明,试验范围内蛹虫草菌固态发酵生产纤溶酶的适合培养基主料为麸皮和大米,二者质量比为1︰1,培养基加水量75 g/100 mL,无机盐CaCl_2和(NH_4)_2SO_4的添加量分别为0.1 g/100 mL和2 g/100 mL,培养基初始pH自然,接种量25 g/100 mL,培养时间5 d,固体发酵物的纤溶酶浸提时间为4 h。优化条件下的固体发酵纤溶酶活力达167±1 U/mL。     

蛹虫草茶酒的研究

将茶叶加水浸提制得茶汁,将蛹虫草培养基进行糊化、液化和糖化后加入一定比例的茶汁和白砂糖,以活性黄酒干酵母为发酵剂,采用液态发酵法酿造出具有保健功能的茶酒,试验结果表明,茶酒发酵的最佳条件为:蛹虫草培养基水解液和茶汁的比例为1∶1,发酵温度30℃,发酵时间9d、酵母量0.2％、糖度16％、pH值为4.5,该茶酒酒精度为9.7％vo1,兼有茶和酒的香气,有一定的保健功能.     

黄酒发酵醪中特有乳酸杆菌检测和培养基的研究及初步鉴定

通过可溶性淀粉的添加量、培养温度、"X"物质的添加量三因素三水平对黄酒发酵醪中乳酸杆菌培养基配方和培养方法的正交试验研究,以及性能的测定和初步鉴定,表明:黄酒发酵醪中乳酸杆菌培养、分离的培养基配方和培养方法为:加饭酒稀释至酒精度14.5%voL、加"X"物质的量1.3%、加可溶性淀粉0.5%或不加、培养温度18℃或30℃、压盖密封培养;黄酒后发酵醪中的优势菌,在上述培养基中18℃生长良好,25℃及以上生长不良或生长极慢,初步鉴定为乳酸杆菌的新种,命名为黄酒乳酸杆菌Ⅱ-1(Lactobacillus chinese-rice-wineⅡ-1)。黄酒前发酵醪中的优势菌,在上述培养基中30℃生长良好,20℃及以下生长缓慢,初步鉴定为乳酸杆菌的新种,命名为黄酒乳酸杆菌Ⅱ-2(Lactobacillus chinese-rice-wineⅡ-2)。     

黄酒酿造中高耐酒精度乳酸杆菌的检测方法和培养基研究及初步鉴定

通过加可溶性淀粉的量、培养温度、加"X"物质的量三因素三水平对黄酒发酵醪中高耐酒精度乳酸杆菌培养基配方和培养方法的正交试验研究,性能的测定和初步鉴定研究,以及在原酒培养基(加饭酒培养基:坛装加饭酒加水稀释至酒精度17.0%vo L或不稀释)培养、检测试验研究,结果表明:黄酒发酵醪中高耐酒精度(17.0%vo L或以上)乳酸杆菌培养、分离的培养基配方和培养方法为:加饭酒稀释至酒精度17.0%vo L、加"X"物质的量0.3%、加可溶性淀粉0.5%或不加、培养温度18℃或30℃、压盖密封培养;黄酒后发酵醪后期酒精度17.0%vo L或以上中的优势菌,在上述培养基中18℃生长良好,25℃及以上生长不良或生长极慢,初步鉴定为乳酸杆菌的新种,命名为黄酒乳酸杆菌Ⅲ-1(Lactobacillus chinese-rice-wineⅢ-1),也是引起成品黄酒酸败的主要菌种。黄酒发酵醪中的部分菌种,在上述培养基中30℃生长良好,20℃及以下生长缓慢,初步鉴定为乳酸杆菌的新种,命名为黄酒乳酸杆菌Ⅲ-2(Lactobacillus chineserice-wineⅢ-2)。原酒培养基(加饭酒培养基)也能检测部分高耐酒精度的乳酸杆菌。     

蛹虫草培养基多糖的超声波提取及抗氧化性研究

研究用超声波提取蛹虫草培养基中粗多糖的工艺条件,并比较了该多糖与蛹虫草子实体多糖的抗氧化性。结果表明:在料液比1∶30(质量比),乙醇用量15 mL,超声波功率70 W,超声时间90 min的条件下,蛹虫草培养基中多糖含量为3.30%。在0.2 mg/mL～1.0 mg/mL浓度范围内蛹虫草培养基多糖与子实体多糖抗氧化能力相似,且具有一定的量效关系。红外显示两种多糖结构相同。     

响应面法优化蛹虫草菌固体发酵五味子药渣发酵条件

将五味子药渣用作蛹虫草菌发酵培养基且不添加其他任何营养物质,并以水料比、基质重量、接种量、发酵温度为考察因子,在单因素实验基础上,结合响应面法以发酵产物中虫草素含量为响应值对发酵条件进行优化。响应面法分析得出蛹虫草菌发酵五味子药渣最佳条件:水料比为2mL/g,基质重量为37g,接种量为23%,发酵温度为26℃。在此条件下发酵15d,发酵产物中虫草素含量高达5.1202mg/g;多糖含量为2.87%,相比发酵前五味子药渣中多糖含量提高了24.97%。结果说明,以五味子药渣作为蛹虫草菌发酵培养基,不仅可以提高五味子药渣的利用价值,而且可以降低发酵蛹虫草菌生产虫草素的成本。     

关于蛹虫草菌多糖发酵及培养基的研究

研究了蛹虫草胞外多糖发酵过程，分析不同因素对胞外多糖得率的影响，获得了比较适宜的培养基组成和发酵条件。蛹虫草胞外多糖优化发酵培养基组成为：蔗糖12％，玉米浆2％，酵母膏2％，硝酸钾0．45％；发酵培养条件为：pH值6．5，温度20℃。此条件下蛹虫草胞外多糖得率为1．188g／100mL，菌丝体干重为1．221g／100mL。     

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