生物复合酶脱墨剂废新闻纸脱墨的应用研究

利用生物复合酶与配伍脱墨剂JFX对废新闻纸进行了脱墨性能的研究结果表明,嘉丰生物复合酶脱墨剂在低成本的脱墨工艺下就达到了与传统的碱法化学脱墨工艺相当的脱墨效果,且浮选过程脱墨浆纤维得率提高5.23%,废水CODcr、BOD5分别下降了74.56 mg/L和41.66 mg/L,且成浆的物理性能也优于化学法,可以在工业生产上推广应用。     

稳定性二氧化氯在废纸脱墨中的应用

针对碱性脱墨的缺点及ClO2的优点，利用ClO2与表面活性剂复配，研制出了在中性条件下有良好脱墨效果的脱墨剂。其最佳工艺条件为：ClO2用量0．6％，SAA用量1．0％，pH6～7，Na2SiO3用量2．5％，EDTA用量0，2％。在此工艺条件下，对报纸脱墨所测得浆料白度为57．4％ISO，对书本纸脱墨所测得白度为62．8％ISO。     

复合酶用于废纸浆脱墨

以纤维素酶、酯酶等组成的复合酶对美废纸浆进行脱墨,得到了美废纸浆脱墨优化的工艺条件为:碎浆浓度12.5%,碎浆时间20min,碎浆温度35～40℃,pH8～9,吨纸复合酶用量200g和吨纸助剂用量800g。在此工艺条件下,#3美废纸浆经脱墨后纸浆白度达到43.5%,纸浆白度高于化学脱墨。     

混合办公废纸和旧报纸在中试规模下的酶法脱墨

采用纤维素酶和聚木糖酶的混合物分别对混合办公废纸（MOW）和旧报纸（ONP）进行脱墨,评价了酶法脱墨的效果,并对酶法脱墨工艺进行优化。MOW和ONP进行酶法脱墨的最佳条件有所不同,在最佳条件下,MOW和ONP脱墨浆的最高白度分别为83．6％和41,9％,脱墨效率分别为6．0％和6．3％叠i采用化学法对MOW和饼ONP进行脱墨时,脱墨效率分别为2．9％和3．5％。常规化学法很难使MOW脱墨,酶法适用于MOW的脱墨。     

水性油墨新闻纸洗涤脱墨工艺探讨

本文对水性油墨废纸洗涤脱墨工艺的影响因素进行了研究。结果表明，水性油墨废纸洗涤脱墨的最优条件为：浆浓8％，碎浆温度50℃，碎浆时间10min，pH=7，脱墨剂脂肪醇聚氧乙烯（7）醚（AEO-7）用量0．6％。在此条件下，洗涤法脱墨可以提高脱墨浆白度6．5％ISO，使残余油墨量下降了950．2mg/kg。AEO-7的洗涤脱墨效果优于六偏磷酸钠和十二烷基磺酸钠。     

脂肪酶用于废报纸脱墨的研究

研究了脂肪酶对废报纸的脱墨作用，优化了脂肪酶脱墨的工艺条件，并与两种化学脱墨剂的脱墨效果进行了比较。结果表明脂肪酶的脱墨效果优于化学脱墨剂，对纤维强度没有负面影响。H2O2漂白后，脂肪酶脱墨浆的返黄值低于化学脱墨浆。     

纤维素酶、脂肪酶和淀粉酶共同用于彩色书刊画报纸脱墨初试

在纤维素酶、脂肪酶、淀粉酶共同用于彩色书刊画报纸脱墨试验中，采用正交试验方法。就三种酶的不同用量对脱墨效果的影响进行了探索，初步确定了脱墨工艺参数。结果表明在选用10％的浆浓，纤维素酶100μ／g，脂肪酶150μ／g，淀粉酶200μ／g。脱墨反应60min可使脱墨浆白度达到67．3％ISO。脱墨率为61．7％。     

复合酶用于旧报纸脱墨的研究

以纤维素酶、木聚糖酶和蛋白酶等组成的复合酶对旧报纸进行脱墨,得到了废纸脱墨优化的工艺条件为:酶用量0.21U/g,碎浆浓度15%,脱墨时间35min.按此工艺条件进行验证实验,脱墨浆的油墨残留量为34mm2/g、白度71.96%SBD,得率91%,抗张指数33.70N·m/g,撕裂指数2.80mN·m2/g.用此复合酶进行脱墨,不但能大大降低油墨的残留,也能提高纸浆的白度,并且脱墨浆得率较高,实现了脱墨、漂白的双重功能.     

脂肪酶用于混合办公废纸脱墨的研究

混合办公废纸（MOW）有较高的回收利用价值，但目前传统的碱性脱墨体系对其脱墨能力较弱，脱墨效率低下。故本文利用脂肪酶用于MOW的脱墨，讨论其最优脱墨工艺条件，分析其脱墨效率。研究发现脂肪酶Lipasefrom Candida rugosa的脱墨效率为86．0％，成纸白度为80．22％ISO、脂肪酶Lipase from porcine pancreas的脱墨效率为91．13％，成纸白度为83．08％ISO。     

国内废新闻纸高效脱墨剂的研究

使用AEO-9和TX-10、马来酸酐、亚硫酸钠及丙烯酸为原料研制了一种针对国内废新闻纸的高效脱墨剂。通过实验得出最佳工艺条件为：NaOH用量3．0％,Na2SiO3用量5．0％,脱墨剂C用量0．5％（以上比例均对绝干浆）。实验结果表明,自制脱墨剂的脱墨效果优于部分市售脱墨剂。     

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