碎浆和浮选条件对混合办公废纸脱墨的影响

研究了美国混合办公废纸（MOW）在不同碎浆浓度以及碎浆时加入脱墨化学品对浮选脱墨的影响，并对实验室浮选操作条件和脱墨化学品的匹配及其用量进行了探讨。结果表明：在碎浆时加入脱墨化学品对提高白度和脱墨效率很重要，在优化的碎浆和浮选条件下，MOW脱墨浆白度由未浮选的71．5％ISO提高到77．3％ISO，残余油墨量由未浮选的29．49mm^2/g浆减少到0．39mm^2/g浆，浆中灰分降低81．2％，纸浆的强度性能也得到改善。     

混合办公废纸磁性脱墨的新试验

介绍了美国Utah大学为混合办公废纸研发的磁性脱墨的主要过程与效果。结果认为采用凝聚剂将碎解浆中的铁磁颜料（氧化铁）与非磁化颜料凝聚后进行磁性脱墨，脱墨效率可达90．8％，从而可以代替浮选脱墨而达到了良好的脱墨效果。     

办公废纸化学法脱墨工艺条件的研究

通过控制变量法研究办公室废纸脱墨工艺,探究温度、化学药品对纸张脱墨效果的影响,由白度及脱墨纸张的物性来表示;并确定脱墨的最佳温度,在最佳温度条件下,用浮选的脱墨方法来研究脱墨化学品的最佳用量。结果表明,采用较高的脱墨温度有利于办公室废纸的脱墨;氢氧化钠对办公室废纸的有效脱墨是必需的;硅酸钠可以明显促进油墨的脱出;过氧化氢的加入对脱墨浆的白度提高有较大贡献。办公废纸化学法脱墨的最佳工艺：温度60℃,硅酸钠3％（对绝干浆）,氢氧化钠1％（对绝干浆）,过氧化氢：1％（对绝干浆）,EDTA：0,4％（对绝干浆）,肥皂：0．5％（对绝干浆）。在最佳脱墨条件下脱墨纸浆的白度为81．37％、耐折度为8次、抗张指数为327．93N·m／g、耐破指数为1．563kP·m2、撕裂指数为6．246mN·m2／g。     

混合办公废纸中性脱墨的研究

本文采用了醇醚磷酸单酯（MAP）与几种常用非离子表面活性剂进行复配，研制出性能良好的混合办公废纸中性脱墨剂TM。实验结果显示，当MAP、AEO-9、Tween-80以1：1：1的质量比复配后用于办公废纸脱墨，脱墨剂用量为0．5％时，通过优化实验，脱墨浆的白度增加7．8％ISO，脱墨率达到80．17％的效果。     

C8-Na和C12-Na表面活性剂以及Ca催化剂在分类办公废纸浮选脱墨中的应用

脱墨是废纸回收循环过程中的重要步骤，目前主要有2种脱墨工艺：洗涤脱墨和浮选脱墨。2种方法中，废纸都是在碱性水溶液中碎浆，加入表面活性剂和其他助剂使油墨粒子分散。     

ONP/OMG中性脱墨剂的优选

本文以ONP／OMG混合废纸为脱墨对象，研究了17种表面活性剂及其复配物的中性脱墨性能。结果表明，AEO-7、AEO-20和平平加A-20不仅在单独脱墨时表现出良好的脱墨性能，而且还具有与其他表面活性剂的良好的配伍性，很适合用作中性脱墨剂的组分，以它们为主要组分的THJ系列中性脱墨剂具有良好的脱墨效果，如用中性脱墨剂THJ-4，可以使脱墨浆白度提高9．4％ISO，而浮损率只为10．4％。     

静电复印废纸的化学法和酶法脱墨研究

静电复印纸的非接触式印刷．其油墨难以脱除,导致静电复印废纸回用较困难,而生物酶法脱墨是一种环境友好型脱墨方法。该文分别利用多种化学品和一种纤维素酶对静电复印废纸进行脱墨处理．并对脱墨实验条件进行优化．经浮选和洗涤处理去除油墨粒子。实验结果表明：与化学脱墨法相比,酶法脱墨的脱墨效率能够提高24．6％,脱墨浆的游离度提高了21．6％,滤水时间缩短11．5％;成纸的物理性能方面,耐破指数和抗张指数分别提高了15．3％和2．7％,而白度和撕裂指数分别降低了2．1％和21．9％;静电复印废纸的酶法脱墨效果优于传统的化学法脱墨。     

碎解条件对油墨老化废纸脱墨的影响

采用二段碎浆的方式，得出了碎解条件影响油墨已老化废纸脱墨效果的趋势，分析了造成这一趋势的原因。结果显示：碎浆浓度和时间是影响脱墨效果的最重要因素，脱墨剂及水玻璃次之。在最佳药剂添加量的情况下．出纸墨点数可达191个/m^2,白度可达％．     

废新闻纸脱墨剂的合成及其脱墨性能研究

使用脂肪醇聚氧乙烯（9）醚（AEO-9）和壬基酚聚氧乙烯（10）醚（TX-10）、马来酸酐、亚硫酸钠及丙烯酸为原料,研制了用于废新闻纸脱墨的高效脱墨剂CS,其最佳脱墨工艺条件为：彬（NaOH）=3．0％,w（Na2SiO3）=5．0％,w（CS）=0．5％（以上比例均为对绝干浆的质量比）。实验结果表明,自制脱墨剂CS的脱墨效果优于部分市售脱墨剂。     

混合办公废纸用脱墨剂制备及应用的研究

针对混合办公废纸油墨特点,通过实验选取多种表面活性剂进行复配以制备出高效脱墨剂,复配配方为AEO-9：ZFA：MAP=1：1：1（质量比）,该脱墨剂脱墨效果较好,与进口脱墨剂相比,尘埃度降低40．69％,白度提高9．02%ISO,配合常规脱墨药品,该脱墨剂相对于绝干废纸的最佳用量为0．5％左右。     

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