富硒香菇功能性奶粉的研制

采用香菇深层发酵对无机元素硒进行富集和转化，获得了硒含量225μg/g的香菇菌丝体。富硒香菇菌丝体不但强化了硒营养，将无机硒转化为吸收和利用率较高的有机硒，而且，各种氨基酸量大幅度提高，强化了营养价值，以富硒香菇菌丝体作基料配制的功能性奶粉除含有普通奶粉的营养成分外，还含有丰富的香菇多糖和有机硒，具有特殊的保健功能，是一种理想的功能性食品。     

富硒灵芝液态深层发酵工艺研究

采用灵芝作为富硒的载体,进行富硒灵芝液态深层发酵实验,研究灵芝对无机硒的生物转化能力。利用正交实验设计,对富硒灵芝液态深层发酵条件如摇床转速、接种量、pH等进行了优化。结果表明,灵芝能在含有低浓度亚硒酸钠(50～200mg/kg)的培养基中生长,并在菌丝体内富集硒。在优化的发酵条件下,富硒灵芝菌丝体干质量为38.0g/L,菌丝体硒含量为1568μg/g,总富硒量为59584μg/L。     

不同硒源对灵芝生物富硒的比较研究

利用亚硒酸钠和活化硒矿为硒源对灵芝的生物富硒进行了研究,结果表明,两种硒源对灵芝生物富硒的效果有较大差异,灵芝对亚硒酸钠溶液和活化硒矿水溶液的耐受浓度分别是1000μg/g和30μg/g。利用亚硒酸钠和活化硒矿为硒源的灵芝菌丝体最高总硒含量分别为2639.1μg/g和302.2μg/g,最高富硒率分别是25.4%和60.0%。由此可知,与活化硒矿相比,以亚硒酸钠为硒源的灵芝总硒含量较高,但是以活化的硒矿水溶液为硒源成本低,且可以充分利用我国硒都恩施州的硒矿资源,有重要的实际意义。     

不同硒源对灵芝生物富硒的比较研究

利用亚硒酸钠和活化硒矿为硒源对灵芝的生物富硒进行了研究,结果表明,两种硒源对灵芝生物富硒的效果有较大差异,灵芝对亚硒酸钠溶液和活化硒矿水溶液的耐受浓度分别是1000μg/g和30μg/g。利用亚硒酸钠和活化硒矿为硒源的灵芝菌丝体最高总硒含量分别为2639.1μg/g和302.2μg/g,最高富硒率分别是25.4%和60.0%。由此可知,与活化硒矿相比,以亚硒酸钠为硒源的灵芝总硒含量较高,但是以活化的硒矿水溶液为硒源成本低,且可以充分利用我国硒都恩施州的硒矿资源,有重要的实际意义。      

灵芝富硒发酵条件优化及硒多糖抗运动疲劳活性研究

为研究灵芝富硒发酵最佳条件，探讨灵芝菌丝体硒多糖对小鼠运动疲劳活性的影响。以菌丝体生物量为指标，利用单因素和响应面试验优化发酵条件，并分析硒多糖的抗疲劳活性。结果显示，最佳富硒发酵条件为：Na₂SeO₃浓度39 mg/L，摇床转速185 r/min，温度28℃，此条件下，灵芝菌丝体干重12.47 g/L，富硒率96.87%，硒多糖386.52 mg/L，多糖中硒含量93.58 mg/kg。硒多糖可显著提高小鼠力竭游泳时间，降低小鼠体内血乳酸(BLA)、血尿素氮(BUN)和丙二醛(MDA)含量，提高肝糖原(HG)、肌糖原(MG)含量，提高骨骼肌细胞中抗氧化酶(SOD、GSH-Px)活性，从而缓解细胞的氧化应激损伤。综上，本研究通过富硒发酵获取的灵芝菌丝体硒多糖具有较好的抗运动疲劳活性，有深入开发利用的前景。     

灵芝液体发酵富集硒元素研究

研究了灵芝在亚硒酸钠水平分别为50μg/mL、100μg/mL、150μg/mL、200μg/mL、250μg/mL、300μg/mL、350μg/mL、400μg/mL的固体PDA培养基上的生长情况,30℃恒温培养6d,观察并测定菌落直径;在不同亚硒酸钠浓度条件下进行液体发酵,180r/min转速下30℃摇床培养5d,检测发酵液生物量、富硒率,同时检测富硒后菌丝体部分金属元素的含量变化。结果表明:150μg/mL~250μg/mL的含硒固体PDA培养基上菌丝体生长好,在含硒250μg/mL液体发酵培养基上菌丝体生物量最高为0.86g,300μg/mL发酵液中富硒率最高为47.71%,而且富硒后的菌丝体其他金属元素含量变化不明显。     

富硒灵芝南瓜挂面的研制

将灵芝在Na2SeO3含量为100mg／L的培养基中进行富硒培养后，用水浸提菌丝体取其汁液，再将南瓜经预处理后磨浆均质，加入到挂面配料中。通过正交试验确定了富硒灵芝南瓜挂面的最佳配方，并研制出色泽微黄、风味独特、营养丰富，具有一定保健作用的高档挂面新品种。     

硒和铈对灵芝多糖和灵芝酸含量的影响

目的:考察在培养液中添加硒和铈对灵芝多糖和灵芝酸含量的影响。方法:向培养液中分别添加不同质量浓度的亚硒酸钠或硝酸铈铵,用液体浅层静置培养法培养灵芝菌丝体,用苯酚-硫酸法测定菌丝体和菌液中的多糖,用冰醋酸-香草醛法测定菌丝体中的灵芝酸。结果:添加40mg/L亚硒酸钠培养的灵芝菌丝体,多糖含量比对照提高42.3%,灵芝酸含量比对照提高10.6%;添加15mg/L硝酸铈铵培养的灵芝菌丝体,多糖含量比对照提高51.1%,灵芝酸含量则有所降低;两种元素还可明显提高菌液中灵芝多糖的含量。结论:向培养液中适量添加硒或铈,可显著提高灵芝菌丝体和菌液中的多糖含量,硒还可同时提高菌丝体的灵芝酸含量,铈则降低灵芝酸含量。生产中可根据实际需要添加硒或铈,以获得品质优良的灵芝菌丝体和菌液。     

富硒大豆的灵芝菌丝体液态发酵条件优化

以富硒大豆为原料,采用液体发酵技术对富硒大豆的灵芝菌丝体液态发酵条件进行研究。富硒大豆经浸泡、磨浆、过滤、煮沸后接种灵芝菌种发酵,以水解度为指标,通过单因素和正交试验对温度、初始pH值、摇瓶转速及豆浆质量分数等发酵条件进行优化。结果表明：富硒大豆的灵芝菌丝体液态发酵最佳条件为发酵温度28℃、培养基初始pH5.8、摇瓶转速160r/min、豆浆质量分数5%、发酵时间132h。在最佳发酵条件下,大豆蛋白的水解度达27.8%、大豆多肽产量7.0178mg/L、多糖产量1.75mg/L、灵芝酸产量0.66mg/L。     

耐硒驯化灵芝菌种的液态发酵中硒的富集特征

对灵芝(Ganoderma lucidum)菌株在平板上做耐硒驯化,然后对驯化前后灵芝菌种液态发酵过程中富硒性能进行了比较,最后对驯化灵芝液态发酵中硒富集特征进行了研究。实验结果表明,灵芝菌种经耐硒驯化后,其生物量、菌丝体硒含量、总硒含量最高分别达到16.1 g/L,13 264μg/L和91.5 mg/L,明显优于未驯化组。对驯化灵芝液态培养过程中硒富集特征研究表明,富硒灵芝中存在硒代蛋氨酸(SeMet)、硒代胱氨酸(SeCys2)、硒甲基硒代半胱氨酸(SeMeCys)和无机硒(Se(IV))等4种硒形态,其中SeMet、SeCys2占主要部分,分别可达硒代氨基酸总量的60%～90%、10%～40%;在培养过程中单一增加Na2SeO3添加浓度,并不能显著增加灵芝中硒代氨基酸含量,而更多以Se(IV)形式存在。     

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