从甜菜粕中提取食用纤维和果胶的研究

甜菜废粕是量大而集中的甜菜制糖废弃物，由它制成的食用纤维具有高的持水性，有明显的降血脂、降胆固醇、降血糖作用，能大幅度降低膳食热量，是目前性能最好的食用纤维之一。本文介绍了甜菜食用纤维的提取工艺，性能测试，在保健食品中的应用及卫生毒理和临床研究结果。还研究了从甜菜粕中提取果胶的工艺（包括一种不使用酒精的果胶提取工艺）。     

花生膳食纤维的提取研究

目的:花生除少部分作为干果食用之外,大部分作为油料资源用于榨取食用油脂,花生粕是花生仁提取油后的副产物,主要作为饲料和肥料,没有得到很好的开发与利用,本研究以花生粕为原料,提取功能性食品添加剂膳食纤维。方法:主要研究了NaOH浓度、提取温度和提取时间对花生粕水不溶性膳食纤维提取率的影响,并通过正交实验对膳食纤维制备工艺进行优化,同时研究了水溶性膳食纤维的提取条件。结果:水不溶性膳食纤维的提取工艺条件:15%NaOH溶液,40℃提取50min,提取率为34.20%;水溶性膳食纤维的提取工艺条件:提取水不溶性膳食纤维后的滤液调pH到3.0除去蛋白质,再调pH到6.5,乙醇沉淀,提取率为8.70%。结论:用化学分离法提取花生粕中膳食纤维是可行的,且可提高花生附加值,增加农民收入。     

甜菜粕的深层次开发

以甜菜粕为原料通过新的生物化工技术开发出附加值高的果胶、膳食纤维、单细胞蛋白、食用茵等深加工产品，可大大提高甜菜粕的综合利用率，提高糖厂的经济效益。     

大豆膳食纤维制备工艺的研究

大豆膳食纤维是一种广泛存在于豆科植物种子中的功能活性物质,对人体具有多种特殊保健功能。为此,我们以大豆饼粕为原料,通过L9(34)正交实验设计方法优选了大豆膳食纤维的制备工艺条件,即先用5％氢氧化纳,于温度80℃条件下提取分离出大豆饼粕中的蛋白质,再用耐高温型α-淀粉酶(3000U／100g饼粕)加热80℃酶解处理豆粕渣30min,继而经脱色、过滤、干燥等程序就可得到含总纤维80％以上的大豆膳食纤维产品,其工艺产率约90％,产品的各项理化指标均达到了国家食品添加剂的有关标准。同时,工艺过程中的碱性提取液,经进一步处理还可用于生产浓缩大豆蛋白,如此使大豆饼粕得到了充分开发利用。     

苦瓜的应用价值与开发利用研究进展

介绍了苦瓜在食用、药用和美容等方面的应用价值,总结了苦瓜中皂苷、膳食纤维粉、多糖、乙醇和黄酮等成分的提取工艺,分别从苦瓜籽、苦瓜酒、苦瓜茶、苦瓜饮料、苦瓜果脯、苦瓜酱和苦瓜凉品等加工产品分析苦瓜产品的现状及主要应用。此外,综述了苦瓜汁褐变的处理技术。探讨了苦瓜加工利用的研究方向。     

应用助压剂降低干粕煤耗

本文对动压剂提高废粕机械脱水性能的机理及工艺条件进行了讨论，介绍了助压剂的实验室结果，证实用硫酸钙作为助压剂，能够明显提高压粕固形物含量，从而达到干粕节能的目的。     

甜菜膳食纤维超微粉碎工艺与性能的研究

以甜菜废粕为原料,利用乙醇提取果胶后,得到膳食纤维,将膳食纤维干法超微粉碎后,测定其持水力、膨胀力、对油脂吸收能力和阳离子交换能力等物理化学特性,结果表明超微粉碎处理对膳食纤维品质的影响较大.     

柠檬皮渣膳食纤维制备工艺研究

以柠檬皮渣为原料,分别采用水和95%的乙醇为溶剂在不同温度下制备柠檬膳食纤维,并测定其膳食纤维组成和理化特性。结果表明：柠檬膳食纤维制备的工艺条件采用水在室温下处理1min,并进行冷冻干燥,可以得到总黄酮含量、VC含量和持油力较好的产品;柠檬膳食纤维制备的工艺条件采用乙醇在60℃处理90min,并进行冷冻干燥,可以得到SDF/IDF（可溶性膳食纤维/不溶性膳食纤维）比值合理、持水力、粘度、白度都较好的产品。     

棉籽浓缩蛋白制备及其物理改性工艺研究

以低温脱溶棉籽粕为原料,选用乙醇洗涤法制备棉籽浓缩蛋白。考察了乙醇体积分数,醇洗温度,醇洗时间,醇洗次数,料液比对棉籽浓缩蛋白产品蛋白质含量的影响。得到的最佳工艺条件为:乙醇体积分数70%,醇洗温度50℃,醇洗3次(每次20 min),料液比1∶7;在最佳工艺条件下,制得棉籽浓缩蛋白产品蛋白质含量为68.25%(N×6.25,干基),游离棉酚含量下降到0.035 4%。为提高产品的溶解性,对醇洗棉籽浓缩蛋白进行物理改性研究,探讨了热水温度,捣碎均质时间,蛋白质溶液p H,超声波处理时间对产品溶解性的影响。得到的最佳工艺条件为:热水温度95℃,捣碎均质时间10 min,蛋白质溶液p H 9,超声波处理时间15 min;在最佳工艺条件下,制得的改性棉籽浓缩蛋白产品NSI由12.30%上升到26.59%,且高于原料棉籽粕的24.46%。     

酶水解法制取食用花生蛋白的研究

在用酶水解法从花生饼粕中提取食用花生蛋白的试验中，对原料前处理方法、各水解因素进行了优选，并对试验制得的产品进行了配制混合乳粉的应用以及功能特性对比试验，获得了较好的效果。     

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