用俄罗斯沙棘生产保健茶

利用俄罗斯品种沙棘嫩芽叶制沙棘保健茶，国内尚无报道。我所对其进行制茶研究，充分利用沙棘嫩芽叶，进行无废料加工，提高经济效益。1材料与方法1．1俄罗斯品种沙棘：1994年5月13日采于黑龙江省内，嫩芽叶1－1．5cm。1．2中国野生沙棘嫩芽叶（对照）：1994年5月13日采于黑龙江省内，嫩芽叶长0．5cm。2沙棘保健茶的加工工艺2．1工艺流程采摘→杀青→揉捻→初炒→回潮→复炒→飘扬→分级→包装→贮藏2．2技术要点采摘嫩芽叶：在北方寒冷地区5月13日开始采摘第1批嫩芽叶，春茶嫩芽叶长度以不超过1．scm为宜。摘取沙棘顶端2－3片嫩绿叶。采摘…     

甘肃地区沙棘叶中黄酮类物质含量测定

[目的]研究甘肃不同地区及不同生长时期沙棘叶中的黄酮类物质含量,为评价及开发利用沙棘叶资源提供科学依据。方法:采用高效液相色谱法测定沙棘叶中的黄酮类物质含量,并进行比较分析。结果:沙棘叶中总黄酮平均含量为35mg/g,富含杨梅素(0.62 mg/g)、异鼠李素(0.39 mg/g)。结论:有必要对甘肃沙棘叶进行深层面的研究,以便科学合理利用沙棘资源     

基于响应面法优化沙棘叶饺子皮工艺研究

为提高饺子皮的营养价值,将沙棘叶打浆,添加到饺子皮中,以感官评分和煮制损失率为指标,通过单因素试验和响应面分析法确定最佳工艺配方:以面粉100 g为基准,沙棘叶添加量20.5 g、食盐添加量1.0 g、水添加量60 g.在此条件下,所得到的饺子皮质地均匀、表皮光滑、色泽淡绿、口感滑爽,具有沙棘叶的清香味.     

微波萃取沙棘黄酮的研究

以体积分数70%的乙醇为萃取液,用单因素分析与正交试验相结合的方法,研究了微波萃取沙棘叶黄酮。确定的优化条件为微波功率560W,萃取时间6min,料液比(g∶mL)1∶20。测定沙棘叶中黄酮类化合物的含量为3068mg/g。     

响应面优化玫瑰茄沙棘叶低糖饮料制作工艺

以玫瑰茄、沙棘叶、罗汉果糖苷为主要原料,制作玫瑰茄沙棘叶低糖复合饮料。在传统复合饮料制作工艺的基础上,选取玫瑰茄浸提时间、玫瑰茄浸提温度、玫瑰茄浸提液添加量、沙棘叶浸提液添加量、罗汉果糖苷添加量、柠檬酸添加量等因素进行单因素实验。在单因素实验的基础上,以玫瑰茄浸提液添加量、沙棘叶浸提液添加量和罗汉果糖苷添加量为自变量,以感官评分为响应值,对工艺配方进行响应面优化。确定最优工艺参数为：玫瑰茄浸提温度80℃、浸提时间10 min;沙棘叶浸提温度75℃、浸提时间20 min;玫瑰茄浸提液添加量30 mL、沙棘叶浸提液添加量40 mL、罗汉果糖苷添加量12 g、柠檬酸添加量0.1 g。以此工艺配方制作的低糖复合饮料色泽均匀、口感酸甜适中,具有浓郁的玫瑰茄芳香及沙棘叶清香。     

沙棘叶多肽制备工艺研究

研究利用沙棘叶直接制备沙棘叶多肽的工艺,获得最佳工艺参数。以中性甲醛滴定法测定的水解度为指标,通过酶的筛选以及酶解条件的单因素和正交实验优化得到最适酶解工艺参数。以碱性蛋白酶为酶解剂,酶解条件为酶添加量14000U/g、pH 10.0、料液比(m/V)1∶50、温度45℃,在此条件下酶解效果最好,水解度可达19.88%,多肽得率为7.90%。利用沙棘叶直接酶解制备多肽可行,为沙棘叶多肽制备提供了有效途径。     

富含黄酮苷元沙棘叶发酵茶的制备及其生物活性

以沙棘叶为研究对象,在茯茶的“发花”工艺基础上,采用人工植入的方式将Eurotium amstelodami BSX001孢子悬浮液接种9月份采摘的沙棘鲜叶,制备新型的沙棘叶发酵茶,通过感官审评得知“发花”能够赋予沙棘叶新的风味。沙棘叶经发酵后总黄酮由发酵前的（19.37±0.67）mg RT/g提高到（36.62±1.01）mg RT/g,总酚由（44.61±0.82）mg GAE/g提高到（58.54±1.32）mg GAE/g,每 100 g沙棘叶茶中含异鼠李素（58.37±0.87）mg、槲皮素（64.14±0.91）mg、山奈酚（45.24±1.62）mg,这些黄酮苷元在未发酵沙棘叶中含量极低。另外试验表明沙棘“发花”后抗氧化、降脂活性都有明显提高。     

森林匙羹藤叶保健茶的研制

以森林匙羹藤的保健功能、有效成分及其民间应用为前提,将森林匙羹藤叶研制成一种保健茶,通过对其制茶工艺的研究,选择了杀青、揉捻、起锅烘焙的适宜温度和时间等各种条件,并以花茶、甘草为辅料进行调配,接着利用正交实验选择出最佳配方,然后包装成匙羹藤叶袋泡茶。这种保健茶既改善了匙羹藤茶的风味,同时又提高了其营养保健作用。      

沙棘叶黄酮的提取及其对抗氧化性的影响

目的:利用不同溶剂对沙棘叶黄酮进行提取,研究沙棘叶黄酮的提取及其对抗氧化性的影响,综合提取温度和时间,确定常规条件下提取沙棘叶中抗氧化成分的最佳条件,为沙棘叶抗氧化性的研究提供依据。方法:采用紫外-可见光分光光度法,以芦丁作为对照品,进行检测实验。结果:溶剂对沙棘叶黄酮的提取率、抗氧化性影响较大。结论:沙棘叶中抗氧化物质的最佳提取条件为在30℃下,用80%(v/v)甲醇溶液提取4h。     

沙棘叶黄酮的提取及其对抗氧化性的影响

目的:利用不同溶剂对沙棘叶黄酮进行提取,研究沙棘叶黄酮的提取及其对抗氧化性的影响,综合提取温度和时间,确定常规条件下提取沙棘叶中抗氧化成分的最佳条件,为沙棘叶抗氧化性的研究提供依据。方法:采用紫外-可见光分光光度法,以芦丁作为对照品,进行检测实验。结果:溶剂对沙棘叶黄酮的提取率、抗氧化性影响较大。结论:沙棘叶中抗氧化物质的最佳提取条件为在30℃下,用80%（v/v）甲醇溶液提取4h。      

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