益寿宝的研究

益寿宝主要是由小麦胚芽提取液、柿叶浸提液和动物软骨原料液配制而成。小麦胚芽提取液含丰富必需氨基酸、亚油酸、VE、VB~1,VB~2、VPP明和矿物质;柿叶浸提液含丰富的三萜化合物和VC;动物软骨含丰富的磷、钙、微量元素、大量胶原蛋白、还含大量动物酸性粘多糖,它们还具有生理功能、药理活性,是中老年最佳的保健营养食     

2002年《福建轻纺》总目次

论文除臭微生物的筛选（吴小平，郑耀通）（１－１）AB纱的开发与研制（周金波）（１－４）防晒化妆品中的二氧化钛（林辉）（１－８）筹资成本在投资项目评估决策中的运用（黄珍，陈谦）（１－１２）VEM２００１／４４１装箱机的改进（李忆）（１－１４）防止贮存期柿叶提取液氧化褐变的研究（吴国欣，檀东飞，欧敏锐）（２－１）两种高分子絮凝剂处理污水厂污泥的探讨（李惠英）（２－６）论企业的债权管理问题（黄明亮，吴喜双）（２－１１）羊绒罗曼呢的生产实践（张会青，王秀燕）（２－１５）浅析工业企业基建业务财务管理（郑剑军…     

半仿生提取柿叶黄酮及其抗氧化和抗菌作用

对磨盘柿叶黄酮的半仿生法提取工艺及其体外抗氧化和抗菌作用进行研究。通过正交试验确定半仿生法提取磨盘柿叶总黄酮的最佳工艺条件:固液比1 g:20 mL,提取温度80℃,提取时间1 h,分别以pH≈2.0盐酸溶液和pH≈7.5、pH≈8.5的氨-氯化氨缓冲溶液作为提取液各提取1次。实验表明柿叶总黄酮对油脂过氧化、DPPH自由基、羟基自由基、超氧自由基均有一定的抑制作用。采用滤纸片实验抑菌作用,结果表明磨盘柿叶总黄酮溶液对白葡萄菌和大肠杆菌均有中度抑菌作用。     

柿叶黄酮类物质的提取及抗氧化性研究

本文优化了柿叶黄酮的提取条件,并对其进行体外抗氧化作用研究。采用单因素和正交试验设计优化得到柿叶总黄酮的最佳提取条件为：用50%乙醇,以1∶60的料液比,在90℃回流提取45min。此条件下总黄酮的提取得率为7.59%。抗氧化性试验结果表明,柿叶黄酮提取液能有效的清除超氧阴离子自由基和羟自由基,其抗氧化性优于VC,是一种有开发潜力的天然抗氧化保健品。     

柿叶保健茶的生产技术

1概述：柿叶中含有黄酮类、鞣质、否百精类化合物和树脂、还原糖、多糖及有机酸、胡萝卜素等多种物质。柿叶中黄酮式具有降血压、增加冠状动脉血液流量的作用。本法是以嫩柿叶为原料，充分利用柿叶的药用成分而制成的一种保健茶。经常饮用此茶，可增进新陈代谢、软化血管、降低血压和具有消炎作用。2工艺流程：3加工要点：3．1原料的选择与预处理：选择新鲜6～10月份嫩柿叶，此时营养成份较高。剔除有虫斑、药班等影响品质树叶，然后去除叶柄。3．2脱脂：目的去除柿叶中的树脂，以免影响成品风味。按柿叶与水3河比例将柿叶放入水中，另外加…     

柿叶保健茶的研制

本文以新鲜柿叶为原料，经杀青、揉捻、烘干、粉碎后加入适量山楂、何首鸟等混合、包装研制而成的柿叶袋泡茶。茶汤清澈，具柿叶特有的清香味，回味甘甜。     

柿叶茶的制作工艺

1柿叶的保健功能近年来研究发现,每100g柿叶中含糖及淀粉5－8g,蛋白质0．5g,脂肪0．2g,VA200IU,Vc8mg,还含有黄酮类、酚类、香豆素、挥发油、有机酸湖萝卜素、胆碱等物质。具有生津止渴、清热解毒、通利血脉、降低血压、增加冠状动脉血流量等功能,故常饮此茶对冠心病、高血压、脑动脉栓塞、糖尿病、神经官能症,均有防治作用。2柿叶的采收及加工2．1采收柿叶的主要成分维生素和黄酮类的含量随季节变化,以秋叶较高,特别是近于脱落时含量最高,因而须在秋季采叶,且采后要及时加工,防止霉变。2．2加工工艺流程柿叶的选择→修整→清洗→沥干→漂烫→冷水浸泡→晒干→切碎→成品2．2．1柿叶的选择选择质厚 ......     

柿叶-马铃薯低酒精度饮品的研制

以马铃薯、柿叶、蔗糖、蜂蜜等为原料，经发酵、浸提、配制成柿叶．马铃薯低酒精度饮品，简述了生产工艺及操作要求。     

比色法测定柿叶中总黄酮的含量

利用黄酮类化合物可与金属离子形成有色螯合物的原理,建立柿叶中总黄酮含量测定方法,并且对供试品制备方法进行选择。通过正交试验设计选取最佳供试品制备条件,采用分光光度法,KAc-AlCl3体系与供试品中黄酮提取物反应,选择最大吸收波长,以芦丁为对照品制作标准曲线,并做方法学考察。供试品制备:提取液70%乙醇溶液,提取时间75 min,供试品与乙醇溶液的固液比为1∶50(g/mL),用KAc-AlCl3体系比色法测定供试品柿叶中总黄酮含量为1.13%,重复性RSD=1.86%(n=6),平均回收率为99.23%,RSD=0.27%(n=5)。KAc-AlCl3体系比色法测定柿叶中总黄酮含量的方法可行,呈色稳定,操作简便,可作为柿叶中总黄酮的含量测定方法,并可以做为快速测定方法应用于生产中对总黄酮含量的监控。     

揉捻和干燥方法对柿叶茶品质的影响

研究了揉捻和不同干燥方法对安溪油柿叶茶品质的影响。结果表明:揉捻可增加柿叶茶的细胞破损率,从而使柿叶茶的水浸出物含量增加,有利于提高柿叶茶的可冲泡性。柿叶茶采用炒干能够得到较适宜的营养成分含量,而且经过炒干的柿叶茶色泽黄绿、香气浓厚、滋味鲜醇回甘、叶底绿匀,感官评分高。柿叶茶炒干时要注意控制火候和时间,而且在炒制过程中还要经常翻动。     

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