德江天麻营养成分分析与评价

分析德江天麻的营养成分,测定德江粗蛋白、粗脂肪、维生素C、粗纤维、氨基酸、矿物质等营养成分,并对其进行分析与评价。结果表明:德江天麻粗蛋白、粗脂肪含量较高,粗纤维其次,维生素C的含量最低;氨基酸总量达10.034 g/100 g,必需氨基酸(Essential amino acids,EAA)/氨基酸总量(Total amino acids,TAA)为41.71%,必需氨基酸(Essential amino acids,EAA)/非必需氨基酸(Non-essential amino acids,NEAA)为71.17%,必需氨基酸种类齐全比例均衡,第一限制氨基酸为Lys,矿物质元素含量丰富,常量元素以K含量最高,微量元素中以Mn的含量最高,分别为41 234.43 mg/kg和20.5 mg/kg。德江天麻是一种粗蛋白含量高,维生素C含量低,必需氨基酸种类齐全,矿物质元素丰富,营养价值较高的植物,具有很好的开发应用前景。     

水提紫甘薯色素废渣营养成分分析与评价

采用国家标准分析方法检测水提紫甘薯色素废渣营养成分。实验结果表明:水提紫甘薯色素废渣含蛋白质62mg/g,粗纤维26mg/g,粗脂肪4mg/g,属于高纤维低脂肪食品;含有17种氨基酸,其中必需氨基酸含量25.90mg/g,占总氨基酸的44%;含有5种脂肪酸,其中饱和脂肪酸占16.55%,单不饱和脂肪酸占43.75%,多不饱和脂肪酸占39.70%;维生素C含量高达0.63mg/g;富含钙,含量为2.10mg/g。水提紫甘薯色素废渣具有极高的开发利用价值。     

油用牡丹籽粕营养成分分析研究

测定油用牡丹籽粕粗脂肪、粗纤维、粗多糖、粗蛋白、氨基酸及微量元素等营养成分的含量。结果表明:牡丹籽粕粗脂肪含量6.19%,粗纤维3%,粗多糖7.67%,粗蛋白28.12%,氨基酸总量为25.22%,氨基酸种类齐全,其中必需氨基酸含量占34.67%,非必需氨基酸含量占65.33%。微量元素铜、铁、锌、锰的含量分别为20.95、651.30、172.63、35.05μg/g。牡丹籽粕营养成分丰富,可进一步加强其资源化利用。     

豆腐柴叶营养成分分析与评价

对豆腐柴叶中的果胶、蛋白质、维生素C、多酚、黄酮、粗纤维、氨基酸、矿质元素等营养成分进行综合分析,用必需氨基酸化学评分法进行评价,为豆腐柴叶开发利用提供理论依据。结果表明:豆腐柴叶营养物质丰富,其中果胶、粗蛋白和维生素C含量较高,分别为17.33 g/100 g、14.85 mg/100 g、8.14 mg/100 g,氨基酸总量达14.24 g/100 g,必需氨基酸/氨基酸总量为41.36%,必需氨基酸/非必需氨基酸为70.53%,必需氨基酸种类齐全比例均衡,矿物质元素全面,以钾和钙的含量最高,分别为22 683.68 mg/kg和2 835.15 mg/kg。     

薇甘菊栽培的巨大口蘑营养成分研究

本研究对薇甘菊栽培的巨大口蘑营养成分进行了研究,结果表明:每100 g干的巨大口蘑子实体中总糖、多糖、粗纤维、粗脂肪、粗蛋白、灰分含量分别为54.24 g、13.42 g、5.52 g、1.60 g、15.55 g、6.21 g。巨大口蘑中含有17种人体所需的氨基酸,氨基酸总量为15.13 g/100 g,其中必需氨基酸占氨基酸总量的40.38%,必需氨基酸与非必需氨基酸的比值(E/N)为0.68,符合FDA和WHO提出的理想蛋白质必需氨基酸含量达40%以上,E/N在0.6以上的要求。矿质元素K、Na、Ca、Mg、Cu、Zn、Fe、Mn含量分别为27.58 g/kg、0.24 g/kg、0.23 g/kg、0.90 g/kg、69.72 mg/kg、55.52 mg/kg、51.46 mg/kg、10.05 mg/kg。有毒重金属铅、镉、总砷的含量低于食用菌质量安全要求的重金属含量限量标准。总汞含量有少许超标。这一研究结果为薇甘菊栽培巨大口蘑的进一步开发和利用提供了理论依据,也为薇甘菊的综合防治提供了新方法。     

喷雾干燥法制备双孢菇蛋白粉工艺优化及其营养价值评价

建立了喷雾干燥法制备双孢菇蛋白粉的工艺。以集粉率为指标,在单因素实验基础上,对进风温度、提取液蛋白质浓度、进料速率进行单因素及正交实验。结果表明:进风温度为165 ℃、提取液蛋白质浓度为40 mg/mL、进料速率为650 mL/h时,集粉率最高为38.8%。所得蛋白粉为奶白色,有鲜蘑菇香味。营养检测分析表明,双孢菇蛋白粉蛋白质含量为65.8%,碳水化合物为8.8%,粗脂肪为0.4%,粗纤维为3.8%,灰分为2.0%,水分为7.20%;氨基酸种类齐全,人体必需的8种氨基酸占氨基酸总量的41.0%;苏氨酸、异亮氨酸、赖氨酸、色氨酸四种必需氨基酸接近FAO/WHO标准。此外,还含有丰富的矿质元素,如重金属镉、铅、砷、汞含量均在国家规定的食品安全标准以内。     

1-MCP和MJ对菜用大豆采后籽粒营养成分的影响

研究了菜用大豆贮藏期间籽粒蛋白质，脂肪，氨基酸和VC含量的变化，同时评价了菜用大豆籽粒中氨基酸组成和质量。结果表明，菜用大豆籽粒中含有32．82％（干重）蛋白质，24．55％（干重）粗脂肪以及16.92mg/100g(鲜重）的VC，籽粒中必需氨基酸占氨基酸总量的39．46％。采用MJ（茉莉酸甲酯）和1－MCP（1－甲基环丙烯）处理可以使籽粒在贮藏期间保持较高的蛋白质，VC和必需氨基酸含量以及较高的氨基酸评分，而对粗脂肪含量无明显影响。     

枳椇子营养成分和总黄酮含量分析及评价

以枳椇子为试材,分析研究枳椇子的常规理化成分、氨基酸组成、矿物元素含量、枳椇子油的脂肪酸组成及黄酮类物质含量。结果表明,枳椇子中含有丰富的碳水化合物(12.08%)、粗蛋白(13.96%)、粗脂肪(9.45%)和粗纤维(53.91%),15种氨基酸总含量为12.63 g/100 g,7种必需氨基酸含量占氨基酸总量的35%,必需氨基酸和非必需氨基酸含量的比值为0.54。AAS与CS值显示,蛋氨酸为枳椇子蛋白质第一限制氨基酸;元素含量从高到低依次为K、Ca、Mg、Na、Fe、Mn、Cu、Zn;枳椇子油中脂肪酸主要由不饱和脂肪酸组成(89.74%),以亚麻酸含量最高(40.26%)。枳椇子中黄酮类物质的含量为27.61 mg/g。枳椇子富含人体必需的营养成分,属营养和保健功能兼具的新资源食品。     

桑叶蛋白超声波辅助提取工艺优化及其氨基酸组分分析

研究桑叶蛋白的超声波辅助提取工艺,对其氨基酸组分进行分析。在单因素设计的基础上,采用响应面法对液料比、破碎时间、浸提时间、NaCl浓度4个因素进行优化,得到桑叶蛋白提取的最佳工艺：液料比43∶1（mL/g）,破碎时间20 min,浸提时间40 min,NaCl浓度0.42%,此条件下桑叶蛋白的提取率为9.19%,提取的桑叶粗蛋白中的氨基酸种类丰富,至少含有17种氨基酸,必需氨基酸含量为29.11g/100g粗蛋白,占总氨基酸含量的37.6%,必需氨基酸（essential amino acids,EAA）/非必需氨基酸（non-essential amino acids,NEAA）为0.603,接近于FAO/WHO 标准规定的必需氨基酸含量40%和EAA/NEAA值0.614。因而桑叶蛋白营养价值较高,是一种十分优良的蛋白质资源。     

神秘果种子营养成分分析与评价

以神秘果种子为原料,依据国标及常规方法对神秘果种子的水分、灰分、粗纤维、粗脂肪、粗蛋白、还原糖、多酚、多糖、脂肪酸、18种氨基酸及12种矿物质元素等营养成分进行分析和评价。结果表明,神秘果种子中水分、灰分、粗纤维、粗脂肪、粗蛋白、还原糖、多酚、多糖含量分别为6.74 g/100 g、7.14 mg/g、4.40、15.69、26.76 g/100 g、0.59 mg/g、11.56 mg/g和12.33 mg/g;检测出20种脂肪酸,其中不饱和脂肪酸占脂肪酸总量的54.80%,主要是十八碳烯酸(29.96%);检测出18种氨基酸,富含多种药用氨基酸(63.75%),8种必需氨基酸含量占总氨基酸总量的40.69%,必需氨基酸比值系数分(SRC)达到了94.22;测定了12种矿物质元素含量,常量元素和微量元素中含量最高的分别为K和Mn,Cd、Hg、As、Pb四种重金属元素含量很低,均符合《中国药典》(2010版)标准。因此,神秘果种子是营养和保健价值较高的新资源食品,具有良好的开发前景。     

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