三倍体毛白杨枝桠材化学组成的研究

对三倍体毛白杨枝桠材、三倍体毛白杨主干、黑杨枝桠材的化学组分进行了分析。结果表明:尽管三倍体毛白杨枝桠材不如三倍体毛白杨枝桠材主干优秀,但还是优于黑杨枝桠材和草类原料。因此三倍体毛白杨枝桠材用于制浆造纸是可行的。     

三倍体毛白杨枝桠材化学组成的分析与比较

对三倍体毛白杨枝桠材、三倍体毛白杨主干、黑杨枝桠材的化学组分进行了分析。结果表明：尽管三倍体毛白杨枝桠材不如三倍体毛白杨主干优秀，但还是优于黑杨枝桠材和草类原料。     

三倍体毛白杨枝桠材NaOH—AQ法蒸煮研究

本文主要对三倍体毛白杨枝桠材NaOH—AQ法蒸煮进行了探索．分别讨论了用碱量、蒸煮时间、蒸煮温度及蒽醌用量对制浆的影响。     

盐土三倍体毛白杨幼树APMP制浆性能的研究

对盐土三倍体毛白杨幼树进行了两段处理的APMP制浆,通过与普通土壤生长的5年生三倍体毛白杨和黑杨幼树分别进行的制浆性能的比较研究,未发现盐土生长环境对三倍体毛白杨的制浆应用造成明显影响.     

一年生盐土三倍体毛白杨APMP制浆工艺研究

对1年生盐土三倍体毛白杨以及5年生普通土质三倍体毛白杨的纤维特性和APMP制浆性能进行比较研究.基于新闻纸的质量要求提出相应工艺条件Na2SiO3用量2%,MgSO4用量0.5%,EDTA用量0.5%,第一段NaOH用量为2%,H2O2用量为1%;第二段NaOH用量3%,H2O2用量为4%.在此条件下利用盐土三倍体毛白杨幼树原料制备APMP,对该原料用于新闻纸生产的可行性进行了初步探讨.     

四种速生杨木制浆及漂白性能的研究

本文对四种5年生速生阔叶材的制浆及漂白性能进行了比较研究，结果表明：三倍体毛白杨的纤维较长，分布均一，具有较大的长宽比和小的壁腔比，纤维素含量较高，木素含量较低，是一种较好的造纸原料。四种原料分别进行了碱性亚纳一蒽醌法蒸煮并采用DED三段漂白，对其纸浆性能进行检测分析，结果表明：三倍体毛白杨易蒸煮、易漂白，其成浆得率和白度较高，物理强度较好。     

速生杨树龄及品种对APMP制浆的影响

研究了不同品种、树龄的三倍体毛白杨和中林杨107速生杨为原料的APMP制浆性能.结果表明:三倍体毛白杨的制浆价值略低于中林杨107,5年生速生杨比3年生的APMP浆物理性能要好.使用5年生三倍体毛白杨和中林杨的混合杨木制备APMP浆,其物理性能基本不随二者比例的变化产生大的波动.     

三倍体毛白杨常压醋酸法制浆工艺的探讨

探讨了三倍体毛白杨常压醋酸法的制浆工艺条件，并对其抄纸性能进行了初步研究.研究结果表明，三倍体毛白杨采用常压醋酸法制浆最理想的蒸煮条件是：106℃，预处理1 h，蒸煮时间为3h，液比为1：8，醋酸/水比例为95/5(v/v)，硫酸用量为1.5％(对原料).硫酸用量对三倍体毛白杨醋酸浆的抄纸性能影响较大，硫酸用量的增加会导致纸浆乙酰化程度加深，硫酸用量为1.5％左右能获得比较理想的抄纸性能.三倍体毛白杨醋酸浆的耐破度和撕裂度低于KP浆，优于APMP浆.     

麦草烧碱蒽醌（AQ）浆氧脱木素工艺的探讨

本文以麦草烧碱AQ蒸煮制浆为原料，采用正交试验探讨了最佳的氧脱木素工艺条件，试验结果表明：在12％浆浓、0．6Mpa氧压的条件下。麦草烧碱AQ浆中浓氧漂的最佳工艺条件为4％NaOH、100℃、80min、0．5％MgSO4。     

稻草的碱法亚硫酸盐-蒽醌制浆与纸浆的全无氯漂白

伊朗德黑兰大学木材和造纸科学技术系与德国木材技术和生物工程研究所等单位科技人员研究了稻草的碱性亚硫酸盐-蒽醌（AS／AQ）制浆与纸浆的全无氯（TCF）漂白,AS／AQ制浆选用的活性碱用量14％～18％（以干草片质量计）,Na2SO3／NaOH为60／40～30／70,AQ用量0．1％,液比4：1,     

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