非木材化学浆与杨木磨木浆配抄新闻纸

探讨了杨木磨木浆配以部分非木材化学浆抄造新闻纸,结果表明,杨木磨木浆配用30％～35％龙须草硫酸盐漂白浆或红森全秆硫酸盐漂白浆在实验室小长网纸机上抄造的新闻纸可达到新闻纸国家标准C级(合格品)指标。     

全秆红麻亚铵蒽醌浆与杨木喷碱磨木浆配抄新闻纸

研究了全秆红麻亚铵蒽醌浆、麦草烧碱蒽醌浆、龙须草硫酸盐浆、红麻皮硫酸盐浆与杨木喷碱磨木浆配抄新闻纸,实验室小长网机配抄实验结果表明,以２５％红麻亚铵浆、１５％麦草浆、６０％杨木磨木浆或以３５％～４０％红麻亚铵浆、６０％～６５％杨木磨木浆配抄的新闻纸,其主要物理性能可达到新闻纸国家标准Ａ级指标。     

麦草漂白化学浆配抄新闻纸

本文研究了漂白化学麦草浆与杨木磨石磨木浆配抄新闻纸的有关工艺技术问题。试验结果表明,用50％麦草漂白化学浆和50％214速生杨磨石磨木浆,可以生产出质量合格的新闻纸。     

红麻全秆硫酸盐法漂白浆代替进口木浆配抄凸版纸、胶印书刊纸生产试验成动

由湖南沅江造纸厂和湖南造纸研究所联合试验的红麻全秆硫酸盐法漂白浆代替进口木浆配抄凸版纸、胶印书刊纸的项目,已于1988年4月23日在沅江纸厂通过部级鉴定。 在长网纸机上用硫酸盐法漂白荻苇浆配抄凸版纸、胶印书刊纸,需要配15～20％的进口化学木浆。目前由于进口木浆价格不断上涨,在一定程度上影响了造纸厂的生产。用35～40％的红麻全秆漂白浆和60～66％的硫酸盐法漂白荻苇浆配抄凸版纸、胶印书刊纸,抄造性能良好,成纸物理指标及适印性能与配15～20％进口化     

红麻制CTMP浆试验

本试验的目的旨在以红麻代替木材为原料制作CTMP代替化浆配抄新闻纸,因此进行了红麻的原料分析、红麻磨浆试验与比较、红麻浆的漂白试验、红麻浆配抄新闻纸的试验与比较。试验结果表明:红麻原料较之冷云杉、杨木等更易于预处理;纤维平均长度虽不及冷云杉,但较杨木长与水竹相近;成浆得率可达84.96％,强度较好,特别是撕裂指数高达8.5mN·m~2/g,白度则略低于木材CTMP与SGW,需通过漂白加以提高。红麻CTMP可以代替或部份代替化学浆配抄新闻纸。也可根据需要,分别以木质部与韧皮部或不同配比生产不同品种的CTMP。     

速生杨木CTMP制浆及其应用

杨木用于制浆的前景广阔。本文研究了杨木ＣＴＭＰ制浆的试验条件，如化学品用量、磨浆、漂白和污染负荷，以及对纸浆和纸张质量的影响等。用杨木ＣＴＭＰ浆与其它化学浆配抄可以制得良好的新闻纸和胶印书刊纸。     

杨木爆破浆作新闻纸配浆的初步研究

进行了杨木爆破浆配抄新闻纸的研究，杨木爆破浆取代马尾松化学浆配抄新闻纸后除撕裂度略有下降外，裂断长、拉毛速度、印刷密度、透印值等都有明显改善     

打浆对新闻纸物理性能的影响

本文研究了脱墨浆(DIP)、漂白化学预热机械浆(BCTMP)与硫酸盐浆(KP)在不同打浆度下配抄新闻纸的状况.讨论了打浆度对新闻纸物理性能的影响.     

桦木、杨木磨石化机浆配抄新闻纸

鸭绿江造纸厂与轻工业部造纸研究所合作,研究了阔叶材杨木化机浆和桦木化机浆配造新闻纸工艺,并进行了三次较大规模的试验,试验内容有:(1)碱、亚钠磨石化机浆;(2)碱磨、次氯酸盐漂白化机浆;(3)碱磨、过氧化氢漂白化机浆。生产了近200吨新闻纸。现简要介绍如下。     

硫酸盐红麻浆配抄普通新闻纸的研究

分析了红麻物理及化学成分 ,并对红麻硫酸盐制浆进行了实验小型试制 ,重点研究了红麻漂白浆代替化学半漂木浆配抄普通新闻纸的可行性     

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