海藻多酚类化合物及其抗氧化活性研究进展

海藻多酚类化合物是来自海藻的次级代谢产物,种类较多,具有抗氧化、抗菌、抗癌以及抗炎等生物活性,广泛应用在食品、化妆品和药品等领域。文中简要综述了海藻多酚类化合物的分类及其抗氧化活性,概述了其抗氧化的作用机制和影响因素,旨在为海藻多酚的开发利用提供依据。     

茶多酚在果蔬贮藏保鲜中的应用研究进展

茶多酚是茶叶中多酚类物质的总称,具有良好的抗氧化性能和抑菌功能,是一种无毒害、环保、高效的生物保鲜剂,近年来在食品保鲜中得到了广泛的研究与应用。本文在简要分析了茶多酚的组成及理化性质的基础上,重点阐述了茶多酚对果蔬采后生理生化及营养价值的影响,并对其在果蔬贮藏保鲜应用中存在的问题进行了分析。     

葡萄籽提取物作为肉制品保鲜剂的研究进展

天然提取的食品保鲜剂越来越受到人们的关注,葡萄籽提取物含有大量多酚类物质,具有抗氧化和抗菌活性,能够降低肉制品中脂质氧化,抑制有害微生物的生长。文中主要介绍葡萄籽提取物的保鲜机理及其在肉制品保鲜中的应用。     

生物保鲜剂在水产品保鲜中的应用研究

生物保鲜剂以其天然、无毒等优点,越来越受到人们的推崇,尤其在水产品保鲜中具有广阔前景。首先介绍生物保鲜剂的保鲜机理,然后详细阐述4种常见生物保鲜剂茶多酚、壳聚糖、溶菌酶、乳酸链球菌素及复合生物保鲜剂在水产品保鲜的应用现状及进展,提出了不同生物保鲜剂间的结合使用,可以实现更加有效的保鲜效果,延缓水产品品质下降速度,从而延长其货架期,在水产品保鲜领域具有良好的应用前景。     

植物精油纳米包埋技术的作用机制及其在肉品保鲜中的应用

肉中含有丰富的营养物质且水分活度高,在运输贮藏及销售过程中极易被氧化和腐败变质。因此,肉品保鲜成为食品工业的一大挑战。植物精油作为天然的食品防腐保鲜剂,具有良好的抑菌、抗氧化功效,在肉品保鲜领域具有一定的潜力。但因其水溶性和稳定性较差,限制了在肉品保鲜领域的广泛应用。本文综述了植物精油的抗菌和抗氧化能力及作为肉品保鲜剂所面临的问题、纳米包埋植物精油的方法及对食源性微生物的作用机制。本文通过对纳米包埋植物精油的开发和应用进行展望,为探究新型肉品保鲜剂提供参考。     

植物精油在食品保鲜中的研究进展

植物精油是重要的植物次生代谢产物,由分子量相对较小的简单化合物组成,具有一定芳香气味。由于植物精油具有多种生物活性,作为一种天然保鲜剂在食品保鲜领域的应用越来越广泛。本文介绍了其在水果、蔬菜、肉及肉制品、鱼类产品、乳制品等保鲜领域的应用,并探讨了植物精油在食品保鲜方面存在的问题,并对其发展方向和应用前景作了展望,为植物精油的进一步开发研究及应用提供了依据。     

姜黄素在食品保鲜中应用的研究进展

姜黄素是一种绿色天然的食品保鲜剂,无毒无害,而且具有抗菌、抗氧化等保鲜效果。但由于姜黄素的水溶性差,生物利用率不高等问题,限制了其应用领域,所以增加姜黄素的生物利用率是拓宽其应用领域的重要因素。文章介绍了姜黄素的结构和食品保鲜原理,还综述了近年来姜黄素在食品保鲜领域中利用微胶囊、静电纺丝、纳米络合和胶体等方式提高其生物利用率的研究进展,为了姜黄素在食品保鲜领域中进一步的开发和利用提供一定的参考。     

蜂胶在食品工业中应用的研究

蜂胶是一种天然安全具有多种生物活性的物质,具有高效的抗氧化、抑菌、成膜等特性,近年来被作为一种高效安全的食品生物抗氧化剂、防腐保鲜剂,广泛用于食品工业中。就蜂胶在油脂工业中的抗氧化作用、在食品防腐保鲜中的抑菌防腐成膜作用进行总结研究,探讨蜂胶的作用机理,同时展望蜂胶在食品工业领域上的应用方向和前景。     

多酚类化合物与其他活性物质协同作用研究进展

多酚类化合物是一类广泛存在于可食性植物中的次生代谢产物,因其具有抗氧化、抗病毒、抗肿瘤、抗衰老等功能,引起医药、食品等多领域的关注。近年来与多酚类化合物协同作用有关的研究逐渐增加。本文总结了近期相关多酚物质协同作用的国内外研究报道,对多酚类化合物与其他物质如V_C、多糖之间在工业、食品生产以及医药三个方面协同抗氧化、抑菌、保鲜、抗辐射、抗癌、降血糖、抗炎七个方面的作用及其机制进行综述。     

甘蔗多酚提取工艺及其在食品工业中的应用进展

多酚是植物体内一种多元酚类次生代谢产物。研究表明:甘蔗中富含多酚类物质,是主要活性成分之一,具有抗氧化、抑菌、防腐保鲜等多种生理功能。文章重点综述了甘蔗多酚类物质的提取方法,并对甘蔗多酚类化合物的生物活性进行了概述。当前,人们对天然植物活性成分的关注与日俱增,对甘蔗多酚类物质进行了研究,不仅可深化人们对甘蔗功能价值的认识,也可为甘蔗副产物的合理开发利用奠定基础。     

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.     

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     

INFOPRINT 2014 was Successfully Held in Dongguan

Sponsored by Printing and Printing Equipment Industries Association of China （PEIAC） and organized by Print China magazine, the Seventeenth Beijing International Printing Information Conference （INFOPRINT 2014） was successfully held on 11th Dec. 2014 at Dongguan Exhibition International Hotel.