喷气涡流纺黏胶针织物的纤维素酶柔软预处理试验研究

选用MEGA LPG-55中性纤维素酶,对喷气涡流纺黏胶针织物进行柔软预处理工艺参数优化。通过单因子和正交试验方法,探讨了纤维素酶用量、浴比、pH值、处理温度和处理时间对织物弯曲长度、弯曲刚度、静态悬垂系数和纵向折痕回复角等织物柔软和弹性性能的影响,对比了不同整理方法对织物柔软性能的影响效果。获得纤维素酶预处理优选工艺参数:纤维素酶用量1.5%(owf)、浴比1∶10、pH值5.5、处理温度40℃和处理时间50 min,织物经纤维素酶预处理组合柔软剂整理后的柔软性能最佳。     

超声波协同纤维素酶对纯棉色织物超柔整理的影响

为了弥补传统柔软工艺的不足,使织物达到超柔软的效果,利用超声波协同纤维素酶对纯棉色织物进行柔软整理。通过改变纤维素酶处理时的浓度、温度、时间及pH值等因素,测试再经柔软整理后的纯棉色织物的弯曲、吸湿性、折皱回复角及强伸等性能指标,并分析使柔软性改善的原因。实验结果表明:超声波协同纤维素酶对纯棉色织物进行预处理后再经柔软整理,可达到良好的柔软效果,同时纯棉色织物的其他物理机械性能也得到一定程度改善,并且缩短了处理时间,节省了资源。     

纤维素酶和聚羧酸在棉织物防皱整理中的应用

为解决棉织物树脂防皱整理后手感和吸湿性差等诸多缺点，采用纤维素酶和聚羧酸对棉织物防皱整理。研究了纤维素酶预处理时酶浓度、pH值和处理时间对聚羧酸防皱效果的影响，确定了纤维素酶预处理的最佳工艺为：纤维素酶浓度3％（owf），pH值4．5，温度50℃，时间30min。结果表明，先经纤维素酶预处理，再进行聚羧酸防皱整理，可使棉织物的折皱回复角较对比样（未经酶处理只经防皱整理的试样）提高19°，白度提高0．7％，而断裂强力保留率仅下降1％，且整理织物的手感柔软，布面光洁，服用性能良好。     

棉针织物的生物柔软整理

用纤维素酶对棉针织物进行整理,整理后织物的弯曲刚度显著降低,柔软性能显著提高,织物强度略有降低。试验结果显示纤维素酶对棉针织物柔软整理的最优工艺为:温度60℃,酶质量浓度2 g/L,时间40 min,pH值为8。     

吸湿导汗牛仔布的酶洗柔软整理

对棉/沟槽涤纶(Coolcool)交织牛仔布采用纤维素酶DL进行柔软整理,通过正交试验确定酶洗柔软整理工艺条件:纤维素酶DL浓度0.2%、温度50℃、pH值5.5、时间60 min.结果表明,采用酶洗柔软整理能使织物具有柔软效果,并保持良好的吸湿导汗性能.     

改善纯棉针织丝光面料手感工艺研究

针对纯棉针织物碱丝光后手感粗糙硬涩问题,介绍了改善方法并进行了优化。指出丝光后的棉针织物可先经酸性纤维素酶处理以去除表面绒毛,提高纹路清晰度和光洁度,改善织物手感;优化的酶处理工艺为：酸性纤维素酶UTA-8 用量1.0%~2.0%, pH值为5.0左右（醋酸调节）,55 ℃处理45 min。然后对经过酸性纤维素酶处理后的丝光织物进行柔软整理,实践显示,丝光织物经酶处理再经柔软整理的效果比丝光织物直接进行柔软整理的效果好,且使用不同种类的柔软剂（氨基硅柔软剂、软片等）拼混可以获得不同的手感风格。     

超声波协同纤维素酶消除亚麻刺痒感工艺研究

采用超声波协同纤维素酶处理方法对纯亚麻针织物进行消除刺痒感的工艺处理,在减量率低于5%、强力损失率低于10%的要求下,通过单因素实验和正交实验寻找最佳的工艺方案,并对优选方案试样进行柔软整理,之后对经过复合处理后的纯亚麻针织物进行性能测试。结果表明,纯亚麻针织物消除刺痒感最佳工艺：超声波的功率500 W,频率 40 kHz,pH值4.5,温度45 ℃,处理时间45 min,纤维素酶浓度2.5 g/L。处理效果优于单独使用酸性纤维素酶处理,且织物弯曲性能和摩擦性能均有较大改善。     

改性羊毛织物超细涂料染色性能

对羊毛织物进行阳离子改性,并用自制阴离子型高分子分散剂制备的超细涂料采用浸染方法对其进行染色。探讨了预处理条件如阳离子试剂浓度、处理浴pH值、处理温度及时间对染色性能的影响。结果表明,涂料浸染羊毛织物的干、湿摩擦牢度可分别达到3~4级和4级;断裂强力和断裂伸长率随处理浴pH值的升高有所下降;弯曲刚度和弯曲滞后的测试表明改性羊毛织物染色后手感柔软,弹性良好。     

双丝光棉针织物的纤维素酶前处理工艺

介绍酸性纤维素酶1600L在双丝光棉针织物上的应用。探讨酸性纤维素酶的用量、pH值、处理温度和时间对织物毛效、白度等的影响;给出大生产工艺,即酸性纤维素酶1600L 1%（owf）,pH值5,处理温度50℃,处理时间60 min。通过酸性纤维素酶处理,织物表面光洁,手感柔软,悬垂性好,能够达到制作高档服装的要求。     

机械柔软整理机理及柔软效果评价

采用爱乐松式特种柔软机（AIRO-1000）对纯棉色织物进行超柔软整理,探讨机械柔软整理的机理及工艺,并借助KES织物风格仪,测试经机械柔软整理后纯棉色织物的弯曲性能、压缩性能、表面特性、折皱回复角、断裂强力、断裂伸长率等指标。结果表明：纯棉色织物经爱乐机械整理后,除断裂强力稍有下降外,织物的其他物理性能指标均得到一定提高,尤其是织物柔软性得到明显改善。     

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