纳米ZnO整理剂的改性分散工艺研究

通过单因素分析了超声时间、pH值、分散剂低聚丙烯酸钠PAAS、硅酸钠、OP-10及偶联剂KH-570的用量对纳米氧化锌的分散,并通过正交实验确定纳米氧化锌改性分散的最佳工艺条件,最终分散结果纳米氧化锌的平均粒径达到53.16nm,且形貌均一稳定。     

纳米氧化锌-聚酯合成工艺的研究及性能表征

研究了纳米氧化锌-聚酯的合成工艺,主要探讨了氧化锌分散处理前、后在聚酯体系中的分散性;分析了不同氧化锌添加量对聚合反应的影响,以及抗氧剂对反应过程和产物的影响;对纳米氧化锌-聚酯复合材料的结晶性和抗紫外线性能进行了表征。     

纳米氧化锌的分散及纳米整理剂的制备

研究了纳米氧化锌在水中的稳定分散介质及纳米整理剂的制备和应用。结果表明，对纳米氧化锌进行适当改性和乳化分散，有利于提高纳米水分散液的稳定性，自制水溶性聚氨酯起到良好的助分散作用；自制的纳米整理剂中纳米平均粒径97．01nm；纳米粒子为单核和多核的微囊式结构；纳米整理剂在纤维上呈非均匀浆膜分布；经纳米整理剂（含纳米ZnO10％）整理的纯棉织物，在10次水洗后的UPF等级达到50＋。     

纳米氧化锌的制备与纳米功能纺织品的开发(上)

介绍了各种制备纳米氧化锌的方法，包括原料、工艺流程、工艺条件以及不同工艺方法的优缺点比较等；介绍了纳米材料的测试仪器与方法；对纳米氧化锌防聚集技术和纳米氧化锌在纺织品上的应用目的、原理及方法进行了阐述；最后介绍了纳米氧化锌功能纺织品的开发实例，进一步指出了该领域亟待解决的问题。     

真丝制品经纳米ZnO处理后的抗菌、抗紫外性能研究

在最佳工艺条件下。以低聚丙烯酸钠（PAAS）和硅酸钠为分散剂。加入乳化剂OP-10和偶联剂KH-570,制备了纳米氧化锌改性分散溶液,分散液中纳米氧化锌的平均粒径达53．16nm。将其应用于真丝织物的抗菌整理。结果表明,整理后的真丝织物,对大肠杆菌和金黄色葡萄球菌的平均抑菌率分别达到了94．1％和90．9％;另外,整理...     

氮掺杂ZnO纳米晶的防紫外和抗菌整理

采用自组装爆燃法制备氮掺杂纳米氧化锌,对其微观结构进行表征,研究了氮掺杂纳米氧化锌水分散体系整理后棉织物的防紫外线性能和抗菌性能.试验结果表明,氮掺杂纳米氧化锌粒度小、分布均匀、分散性好;用氮掺杂纳米氧化锌整理后的织物进行抑菌圈测试及紫外防护因子测试,其防紫外线和抗菌性能优良,且具有较好的水洗牢度.     

纳米氧化锌织物整理剂的制备与整理效应的研究

利用自制的纳米氧化锌功能织物整理剂ZN-l，通过常规后整理工艺获得纳米功能纺织品；发现纳米氧化锌整理剂的抗菌性比非纳米氧化锌强，粒径越小，抗菌性越好；由此制备的纳米功能织物的撕破强力平均提高36．8％、折皱回复角平均提高2．1％、白度平均提高6．8％，手感也有所改善．     

微波协同纳米氧化锌对羽绒的抗菌工艺研究

研究微波协同纳米氧化锌抗菌试验的最佳工艺。在最佳工艺条件下,探讨了微波协同纳米氧化锌的最佳抗菌率,同时进行了纳米氧化锌的回收试验,并测定多次回收的纳米材料抗菌效果的变化规律。微波协同纳米氧化锌抗菌的最佳工艺为:纳米氧化锌与羽绒质量比为0.5,微波时间为3 min,微波功率为200 W,微波时温度50℃,最佳抗菌率为89.13%。微波协同纳米氧化锌对羽绒有较好的抗菌效果,至少可进行2次回收循环使用。     

氧化锌抗菌聚酯的制备及其性能

将纳米ZnO分散在乙二醇(EG)溶液中制成ZnO-EG分散液，然后采用原位聚合法将单体精对苯二甲酸(PTA)、EG和ZnO-EG分散液进行酯化缩聚得到抗菌改性聚酯。分析抗菌改性聚酯的聚合工艺过程，采用激光粒度分析仪对ZnO-EG分散液的粒径分布进行表征；通过偏光显微镜和DSC对抗菌改性聚酯的切片形貌和熔点进行分析，并对抗菌改性聚酯的色值、特性黏度、端羧基含量、二甘醇含量以及抗菌性能进行测定。结果表明：湿法研磨制得的纳米氧化锌分散液粒径明显小于磁力搅拌所制得，且随着湿法研磨时间的增加，分散液粒径呈现先减小后增大的趋势；当抗菌聚酯的ZnO质量分数为0.5%,特性黏度为0.687 dL/g时，纳米ZnO抗菌剂在聚酯中没有发生明显团聚而形成凝集粒子，且均匀分散在聚酯切片中；纳米ZnO抗菌剂的加入使抗菌聚酯的色值偏向光亮黄绿色，抗菌聚酯对大肠杆菌、金黄色葡萄球菌和白色念珠菌的抑菌率分别为92%、99%和78%,具有较好的抗菌性能。     

氧化锌纳米体系的微观形貌及稳定性研究

用透射电子显微镜（TEM）表征由氧化锌、聚丙烯酸盐和硅酮制备三元纳米体系，发现纳米粒子为单核或多核的微囊式结构，囊芯为纳米氧化锌粒子，囊壁由聚丙烯酸盐、硅酮互穿混合而成；表面显示负电性，其微观形貌为链状或簇状的非规则球形；通过研究重力、超声波振荡时间、pH值等条件对纳米体系稳定性的影响，采用浸-轧-烘整理工艺用氧化锌三元纳米体系处理棉织物，用扫描电子显微镜（SEM）观察织物载体上纳米粒子微观形貌，提出了纳米粒子在织物载体上堆积和团聚的收缩效应模型。     

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