真丝织物化学接枝改性后的结构和热性能

利用红外光谱、扫描电镜、热重分析，对具有β—乙烯砜硫酸酯基、磺酸基和三嗪环结构的接枝剂改性后真丝织物的结构和热性能进行研究表明，纤维表面发生明显改变，真丝织物热稳定性提高。     

化学改性后桑蚕丝纤维的结构和热性能

利用红外光谱、扫描电镜、热重分析，对具有β-乙烯砜硫酸酯基、磺酸基和三嗪环结构的接枝剂改性后真丝织物的结构和热性能进行研究，纤维表面发生明显改变，桑蚕丝纤维的热稳定性提高。     

硼硅丙烯酸酯合成及真丝织物接枝改性

1-甲基丙烯酰氧乙氧甲基碳硼烷通过还原、取代反应得到目标化合物1-甲基丙烯酰氧乙氧甲基-2-(1,1,1,3,3-五甲基二硅氧烷基)碳硼烷(PMASC)。以FT-IR和1H NMR鉴定了目标化合物PMASC的结构,并用其对真丝织物进行接枝改性。通过FT-IR和SEM测试表明PMASC已成功接枝到真丝织物上,采用TGA、DSC和MCC对接枝前后真丝织物的热性能进行了分析。当接枝率为34.4%时,800℃下接枝真丝织物的质量残余率为34.2%,并且热分解的吸热峰向较高温度(343℃)移动。结果表明,使用含硼硅单体接枝可以改善真丝织物的耐热性。     

真丝／氨纶弹力织物精炼工艺研究

本文分析了氨纶纤维的结构和弹性特点，对真丝／氨纶力织物的精练方法和工艺进行了系统试验和优化，探讨了热定形对真丝弹力织物性能的影响，为改善织物尺寸稳定性提供了依据。     

真丝／氨纶包覆丝弹性织物缝口保持性的研究

对不同品种的真丝 /氨纶包覆丝弹性织物及常规真丝织物缝口脱开程度进行测试和分析 ,说明真丝 /氨纶包覆丝弹性织物比常规真丝织物有优良的成衣缝口保持性 ,并探讨了包覆丝结构、经纬密度、组织结构等因素对真丝/氨纶包覆丝弹性织物缝口保持性的影响。     

改善夏季真丝服装面料热湿舒适性研究

分析了影响织物热湿舒适性的因素,阐述了改善真丝织物热湿舒适性的方法,设计出了提高真丝织物热湿舒适性的新型面料。     

真丝织物透湿性的影响因素分析

测试了六种不同结构真丝织物的透湿性,运用灰色关联系统法分析了真丝织物的透湿量与真丝织物结构参数的关系,由关联度、关联序得出影响真丝织物透湿量的主要因素。     

硼酸铵掺杂硅溶胶整理真丝织物的阻燃性能

采用溶胶-凝胶法制备了纯硅溶胶和硼酸铵掺杂(硼/硅复合)硅溶胶,并将其应用于真丝织物的阻燃整理。讨论了复合溶胶体系中硼/硅摩尔比对阻燃整理后真丝织物的极限氧指数(LOI)的影响,并采用热重分析(TGA)、微型燃烧量热仪(MCC)和烟密度试验箱(NBS)等手段对整理前后真丝织物的热降解性能、热释放性能和抑烟性能进行了测试和表征。试验结果表明:当溶胶体系中的硼/硅摩尔比为12时,整理后真丝织物的极限氧指数(LOI)最高,达到了29.7%,表现出良好的阻燃性能;相比于纯硅溶胶,硼/硅复合溶胶体系能显著降低真丝织物在燃烧过程中的热释放速率、重量损失率以及烟气释放量。     

真丝/PLA织物的染整工艺研究

以聚乳酸(PLA)长丝与桑蚕丝交织成的丝玉珠缎织物为研究对象,针对PLA纤维不耐强碱和高温的特点,对真丝/PLA织物的前处理、染色、热定形工艺参数等进行了研究,确定了适合真丝/PLA织物的酶练工艺、一浴法染中浅色和一浴两步法或二浴法染深色的染色方法、热定形等染整工艺参数,使真丝/PLA织物保持良好的风格及服用性能。     

在位还原纳米银对桑蚕丝织物结构的影响

根据在位还原的原理,用汽蒸生成纳米银整理桑蚕丝织物,赋予真丝优异的抗菌性能.研究了不同浓度的AgNO3溶液与2 g/L的多氨基化合物(RSD)混合整理后,桑蚕丝织物的表面形态和结构变化,并用电子显微镜(SEM)、傅立叶红外光谱(FTIR)、X射线衍射(XRD)和热性能分析(TG)等手段进行了表征.结果表明:经纳米银整理后真丝织物表面吸附大量的银颗粒,且颗粒分布比较均匀、粒径均达到了纳米级;汽蒸纳米银整理工艺对真丝的结构影响较小.     

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