香烟滤嘴可能致癌

旅美生化学者吴光宇最近指出,取聚丙烯为原料制成的香烟滤嘴对健康可能导致不良影响。 据称,聚丙烯在正常温度下是安全的,但配制为香烟滤嘴,情况会有所不同。香烟在吸啜时温度高达700℃,聚丙烯经高温分解为丙烯,经氧化作用将可能变为致癌物。     

香烟滤嘴用纤维过滤材料的研究现状

根据香烟滤嘴的发展历史，介绍当前制成香烟滤嘴过滤材料的种类。从特性、成本、制备工艺等方面进行综述，分析香烟滤嘴用纤维过滤材料的现状。展望香烟滤嘴用纤维过滤材料的发展趋势。     

PP纤维的最新世界市场动向

美国华盛顿的Fiber Organon首次公布了关于世界聚烯烃纤维(短纤、长丝和裂膜带)生产详细的统计分析.这些统计显示,对PP纤维领域估计的严重不足.总产量的90%以上为聚丙烯纤维,聚乙烯纤维(主要PE短纤维)仅占产量的10%以下.     

驻极体卷烟滤嘴的研究与应用

一种具有能持久贮存真实电荷（静电）能力的聚丙烯驻极体纤维制成的卷烟滤嘴，比醋纤、丙纤滤嘴的滤效高１００％～１２０％，能捕获烟气中４０％～６０％的焦油，是一种成本低、见效快、产出高的高效滤嘴材料。     

竹炭纤维滤嘴对香烟主流烟气中醛类物质的过滤效果

利用竹炭纤维制备香烟滤嘴,模拟吸烟并收集主流烟气,测定其中醛类物质的含量,并用丙酮萃取出滤嘴吸附截留的总粒相物中醛类物质的含量。研究结果表明：竹炭纤维可以明显降低香烟主流烟气中醛类物质的含量,对主流烟气中的总粒相物也有很好的吸附效果,而且随着滤嘴中竹炭纤维重量比例的增大,主流烟气中醛类物质的质量逐渐减少,而过滤嘴丙酮浸出液中的醛类物质质量逐渐增多。竹炭纤维滤嘴香烟主流烟气中醛类物质质量比原醋酯纤维滤嘴降低51.82%。     

醋纤和改性丙纤滤嘴过滤卷烟烟气有害成分效果比较

选用由醋酸纤维丝束和改性聚丙烯纤维丝束两种不同材料滤嘴卷制成的同一牌号卷烟,研究了两种不同材料滤嘴对卷烟烟气中特有亚硝胺、芳香胺、酚类、多环芳烃、氨以及挥发性羰基化合物等有害成分的过滤效果。结果表明:对多环芳烃,改性丙纤滤嘴的过滤效率高于醋纤滤嘴;对芳香胺、烟草特有亚硝胺、挥发性羰基化合物和酚类化合物,两种滤嘴的过滤效率接近,醋纤滤嘴的过滤效率略高于改性丙纤滤嘴;对烟气中的氨,醋纤滤嘴的过滤效率高于改性丙纤滤嘴。     

聚烯烃膜裂纤维的研究进展

介绍了聚烯烃膜裂纤维的基本特性及其生产工艺。综述了聚烯烃膜裂纤维,特别是其使用的原纤化设备的研究进展,并讨论了国内外聚烯烃膜裂纤维生产设备水平的差距。指出了当前国内聚烯烃膜裂纤维存在的问题,并对其未来发展趋势进行了展望。     

聚丙烯膜裂纤维缝纫线通过技术鉴定

由安庆市燎原化工厂承担的技术开发项目——“聚丙烯膜裂纤维缝纫线”,目前通过了省级技术鉴定.聚丙烯膜裂纤维缝纫线具有比重轻、强度大、收缩小、耐磨、耐腐蚀等优点,且其成本低于其它合成纤维缝纫线.鉴定会上有     

香烟滤嘴用纤维材料

香烟过滤嘴是香烟主流烟气与人体的桥梁,优质的香烟滤嘴材料可有效去除烟气中的有害成分,减小吸烟对人体的危害。简单介绍了生产香烟滤嘴棒用的几种纤维原料。     

聚丙烯滤材对烟气中丙烯输送量的影响分析

本文对不同温度下聚丙烯丝束顶空气中的丙烯和滤嘴卷烟烟气中的丙烯做了分析研究。分析结果显示,聚丙烯丝束顶空气中含有极微量的丙烯,在26℃至200℃的温度范围内,其含量为5.9×10-10~1.17×10-9g/g丝束或每个20mm长的丙纤滤嘴含7.7×10-11~1.53×10-10g,表明在高达200℃的温度(远高于卷烟抽吸时滤嘴的温度)下,聚丙烯丝束不会分解产生丙烯。聚丙烯滤嘴烟与醋纤滤嘴烟烟气的对比分析显示,两种卷烟烟气都含有较高量的丙烯,均大约为300μg/支。这样高量的丙烯.显然是卷烟内滤嘴以外的烟叶配方原料在烟支抽吸过程裂解产生的。      

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