海洋贝类蛋白源生物活性肽及肽组学的研究进展

海洋贝类作为一种原料大宗广泛易得的优质蛋白质资源,是生物活性肽开发的理想原料。本文对海洋贝类蛋白资源生物活性肽的概念、国内外研究进展进行了综述,并重点介绍了肽组学在活性肽结构鉴定中的应用,同时对贝类蛋白资源生物活性肽面临的机遇与挑战进行了分析,旨在为开发海洋贝类蛋白资源及其活性肽提供思路。     

合浦珠母贝源抗氧化肽的研究进展

合浦珠母贝是海水养殖生产珍珠主要经济贝类,合浦珠母贝源活性肽是近年来的研究热点。本文综述了国内外近年来在合浦珠母贝源抗氧化肽的酶法制备技术、分离纯化技术、功能性质和应用的研究现状,评述了目前开发合浦珠母贝源抗氧化肽的现状及存在的问题,深入分析了现代基因工程技术在合浦珠母贝源抗氧化肽中的应用前景,为今后高效开发利用合浦珠母贝源抗氧化肽和其他海洋活性肽提供参考。     

海洋生物活性肽的制备、分离纯化及构效关系研究进展

海洋生物活性肽是一类结构多样且具有多种功能和活性的肽类,其制备、分离纯化和生物活性受到了广泛关注。已有不少相关研究证明海洋生物活性肽是一类很具开发潜力的新型药物来源。然而,整合海洋生物活性肽制备技术和生物应用的研究还较缺乏,为此本文综述了近年来海洋生物活性肽制备、分离纯化的方法,并阐述了其原理、优缺点、适用对象和未来发展趋势,介绍了海洋生物活性肽的抗氧化、抗糖尿病、降血压、抗菌、抗癌等功能活性,并深入探讨了其构效关系和未来发展方向,以便为开发新型海洋药物提供有力理论依据。     

海洋蛋白源ACE抑制肽研究进展

血管紧张素转化酶(ACE)抑制肽在血压调节中起着重要作用,食源性ACE抑制肽具有较强降血压效果,是调节血压的潜在活性成分。海洋蛋白源ACE抑制肽是食源性活性肽的重要组成部分,是未来研究的热点。本文综述了海洋蛋白源ACE抑制肽的制备、纯化、结构鉴定、体外和体内活性研究及构效关系等研究进展,同时对海洋蛋白源ACE抑制肽的研究和应用前景进行展望。     

贝类源抗氧化肽研究进展

文章概述了贝类源抗氧化肽制备过程中蛋白酶解、分离、纯化及鉴定的研究进展,基于抗氧化肽活性检测方法及结构鉴定手段;重点分析一级结构对抗氧化机制的影响,指出一级结构中氨基酸基团、亲疏水性、酸碱性、序列及空间构象对抗氧化肽活性产生重要影响,并展望了贝类源抗氧化肽在特殊食品及化妆品中的应用趋势。     

小米蛋白肽制备、分离纯化及生物活性研究进展

该文综述了国内外有关小米蛋白肽的制备、分离纯化、结构鉴定及生物活性评价等研究进展,国内外相关研究表明,小米蛋白经酶解或生物发酵制备的活性肽,具有抗氧化、抑菌、调节免疫、降血压等多种生理功效,在功能食品等领域具有较好的应用前景。同时,该文指出了目前有关小米蛋白肽的研究存在以下不足:微生物发酵法制备小米活性肽研究不够深入,如利用多菌种共同发酵制备小米活性肽等方面有待开展;小米活性肽在动物机体内的活性评价及作用机理研究不足;小米活性肽的稳定性以及风味特征等需要进一步明确。     

海洋蓝藻活性物质及海洋药物研究进展与对策

概述了海洋微藻中的蓝藻毒素及活性肽种类,在分析国内外海洋活性物质及新药研究现状的基础上,提出了我国在海洋天然产物药用研究中应采取的可行性措施和对策.     

海洋胶原蛋白活性肽的研究进展

胶原蛋白是生物体内的重要蛋白质,是结缔组织的主要蛋白质成分。疯牛病(B S E)、口蹄疫(F M D)、禽流感等疾病的发生使人们从陆生源动物组织获取胶原蛋白及其肽的途径受阻。我国渔业资源极其丰富,海产品加工的下脚料含有丰富的胶原,与陆生胶原肽相比海洋胶原蛋白肽具有许多独特的生理功能和理化性质。近二三十年来海洋胶原蛋白及其酶解产物胶原活性多肽取得很大进展,目前海洋胶原蛋白肽也已经成为国内外研究的热点。本文将对海洋胶原蛋白及其活性肽的结构、性质、提取方法以及胶原活性多肽生理活性和发展前景等的研究进展作一综述。     

海洋胶原肽活性及其应用研究进展

海洋胶原肽由于其丰富的来源以及结构特点成为了胶原蛋白肽类的研究热点。海洋生物是具有高营养品质的丰富胶原蛋白来源,多项研究表明衍生自这些海洋胶原蛋白的水解物和肽类显示出多种益于健康的生物活性,在多种食品健康行业中有着广阔的应用前景。制备海洋胶原肽可以提高胶原蛋白回收率,使这些海洋生物资源得到有效利用,这不仅可以满足全球对胶原蛋白日益增长的需求,还能节省自然生物资源,并解决加工海洋生物产生的废品所造成的资源浪费和环境负担,有利于当今社会绿色生产和循环经济的发展。本文从胶原蛋白及其生物活性肽的介绍入手,综合阐述了近年来国内外对海洋胶原肽的各类生物活性开展的研究,并总结了海洋胶原肽当前在保健品、食品工业和医疗领域的实际应用,对MCPs在今后商业产品开发中的潜在用途进行了系统地总结和讨论。以期为海洋胶原肽在保健品、食品工业和医疗等行业的进一步的开发和应用提供科学依据。     

肽组学在食源性活性肽研究中应用的进展

肽组学作为食品科学技术领域一个新兴的重要研究方法,正逐渐应用到生物活性肽制备、纯化、结构鉴定以及构效关系研究中,涉及活性肽的定性与定量的各个方面的内容。本文综述了肽组学在食源性活性肽制备工艺优化、特定功能活性的活性肽筛选、活性肽与受体的作用机制以及构效关系等研究的国内外进展,以期为肽组学在活性肽中广泛深入地应用提供参考。     

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.