精纺大豆蛋白纤维衬衣面料的开发设计

结合羊毛和大豆蛋白纤维各自优良的性能,采用羊毛纤维、涤纶、大豆蛋白纤维混纺,开发出高档大豆蛋白纤维衬衣面料.文章主要描述了大豆蛋白纤维衬衣面料生产中的染料选择、染色工艺流程以及衬衣面料从条染到纺纱、织造、后整理等工艺的主要技术要点.该大豆蛋白纤维衬衣面料系列产品既保持了羊毛纤维原有的丰满、滑糯手感,又充分体现了大豆蛋白纤维的特性.     

大豆蛋白纤维在羊毛混纺产品中的形态变化

文章对已染色羊毛/涤纶/大豆蛋白纤维,经分别用10%次氯酸钠溶液,20%和36%盐酸处理后,大豆蛋白纤维的形态变化进行了研究.研究表明,大豆蛋白纤维纵向形态不光滑,表面有沟槽,夹杂星点泡状物,有细微孔隙;经20%和36%盐酸处理后,大豆蛋白纤维明显变细;用10%次氯酸钠溶液处理大豆蛋白纤维,明显分裂成若干根细纤维.染色的羊毛和染色的涤纶颜色较深,而大豆蛋白纤维染色的颜色亮而浅.     

大豆蛋白涤纶混纺纱纤维分布探讨

通过切片等方法对不同混纺比大豆蛋白纤维与涤纶混纺纱纤维分布规律进行了分析和比较,得出Hamilton和Onion指数.结果表明:大豆蛋白纤维含量为40%时,大豆蛋白纤维与涤纶混纺纱的实际分布与均匀分布Onion指数差异率最大,大豆蛋白纤维有效利用率最高.大豆蛋白纤维和涤纶纤维在混纺纱中的转移规律并不完全符合传统的转移规律.     

精纺大豆蛋白纤维衬衣面料的开发设计

结合羊毛和大豆蛋白纤维各自优良的性能，采用羊毛纤维、涤纶、大豆蛋白纤维混纺，开发出高档大豆蛋白纤维衬衣面料。文章主要描述了大豆蛋白纤维衬衣面料生产中的染料选择、染色工艺流程以及衬衣面料从条染到纺纱、织造、后整理等工艺的主要技术要点。该大豆蛋白纤维衬衣面料系列产品既保持了羊毛纤维原有的丰满、滑糯手感，又充分体现了大豆蛋白纤维的特性。     

大豆蛋白纤维混纺纱混纺比与拉伸性能的关系

为了研究大豆蛋白纤维混纺纱的混纺比与拉伸性能的关系,对各种不同混纺比例的大豆蛋白纤维涤纶纤维混纺纱、大豆蛋白纤维棉纤维混纺纱的拉伸性做了测试分析,并与传统的简化模型做了对比.结果表明:大豆蛋白纤维棉纤维混纺纱的混纺比与强度之间的关系并不符合简化模型,主要是由于混纺纱中两种纤维的交互作用所产生,交互作用越大,差异越大;大豆蛋白纤维涤纶纤维混纺纱、大豆蛋白纤维棉纤维混纺纱的断裂强度和断裂功随混纺比的变化关系基本一致.     

超细特纤维、大豆蛋白纤维梳理针布的研究分析(下)

从超细特纤维、大豆蛋白纤维的纺纱梳理特性出发，系统分析了梳理加工超细特纤维、大豆蛋白纤维的梳理针布_和梳理工艺，并从提高锡林分梳能力、道夫剥取能力和分梳与转移的合理配置等方面提出了加工梳理超细特纤维、大豆蛋白纤维梳理针布的新品开发问题和设想建议，对目前从事超细特纤维、大豆蛋白纤维生产加工的纺织厂和针布制造厂有较大的参考价值。     

大豆蛋白纤维混纺纱弹性的测试分析

为了研究大豆蛋白纤维混纺纱的弹性与混纺比之间的关系,对各种混纺比例的大豆蛋白纤维涤纶、大豆蛋白纤维棉混纺纱的弹性进行了测试分析,得出了大豆蛋白纤维混纺纱的弹性与混纺比之间的关系为y=-0.0005x2 0.074x 93.398,并得出大豆蛋白纤维混纺纱具有良好弹性的合适混纺比为50%.     

超细特纤维、大豆蛋白纤维梳理针布的研究分析(上)

从超细特纤维、大豆蛋白纤维的纺纱梳理特性出发，系统分析了梳理加工超细特纤堆、大豆蛋白纤维的梳理针布和梳理工艺，并从提高锡林分梳能力、道夫剥取能力和分梳与转移的合理配置等方面提出了加工梳理超细特纤维、大豆蛋白纤维梳理针布的新品开发问题和设想建议，对目前从事超细特纤维、大豆蛋白纤维生产加工的纺织厂和针布制造厂有较大的参考价值。     

大豆蛋白纤维织物染整工艺探讨

根据印染加工的要求，对大豆蛋白纤维织物的若干性能进行研究，从实验和实际生产两方面探讨了大豆蛋白纤维织物染整工艺特点，如谨慎烧毛，不丝光，避免高温接触式烘干，并具体介绍了大豆蛋白纤维织物的染整加工要点。     

大豆蛋白纤维混纺产品成分的定性定量分析方法

通过光学显微和红外技术,研究了大豆蛋白纤维的形态和微观集团特征;通过化学分析,研究大豆蛋白纤维的溶解性能,筛选出合适的试剂,进而研究了大豆蛋白纤维与常见纺织纤维混纺产品的定性和定量分析方法。     

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.     

Chlorohydrins of bisphenol A diglycidyl ether (BADGE) and of bisphenol F diglycidyl ether (BFDGE) in canned foods and ready-to-drink coffees from the Japanese market

BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H₂O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.     

European priorities for research to support legislation in the area of food contact materials and articles

A strong science base is required to underpin the planning and decision-making process involved in determining future European community legislation on materials and articles in contact with food. Significant progress has been made in the past 5 years in European funded work in this area, with many developments contributing to a much better understanding of the migration process, and better and simpler approaches to food control. In this paper this progress is reviewed against previously identified work-areas (identified in 1994) and conclusions are reached about future requirements for R&D to support legislation on food contact materials and articles over the next 5 or so years.     

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