山羊绒针织物抗起球整理技术

分析了山羊绒针织物起球的机理。详细论述了用于山羊绒针织物的抗起球方法 ,包括物理化学减量处理法、树脂加法处理法和纳米级溶胶 -凝胶法。纳米级溶胶 -凝胶法是山羊绒针织物抗起球整理技术的一项重大突破     

山羊绒针织物抗起球整理技术

分析了山羊绒针织物起球的机理。详细论述了用于山羊绒针织物的抗起球方法，包括物理化学成量处理法、树脂加法处理法和纳米级溶胶—凝胶法。纳米级溶胶—凝胶法是山羊绒针织物抗起球整理技术的一项重大突破。     

浅谈山羊绒针织物抗起球整理技术

分析了山羊绒针织物起球的机理,介绍了影响山羊绒针织物起球的因素,重点介绍了如山羊绒纤维的长度、细度、纺纱工艺及其织物的组织结构等和山羊绒针织物的抗起球整理技术中的蛋白酶法和纳米级溶胶,凝胶法的技术现状及展望。     

纯棉针织物的纳米抗紫外整理

为了提高纯棉针织物持久的抗紫外性能,采用溶胶-凝胶法,分别以钛酸正四丁酯、正硅酸乙酯为前驱物,制得纳米TiO_2溶胶和SiO_2溶胶,将纳米TiO_2溶胶和纳米SiO_2溶胶按体积比为2∶1配置成纳米TiO_2/SiO_2复合溶胶,对纯棉针织物进行抗紫外整理。采用CARY50型紫外-可见-近红外分光光度计对整理前后的织物进行紫外光透过率测试,且用JIS洗涤方法检测抗紫外线耐久性,并对织物整理前后的白度、顶破强度等性能进行测试和分析。结果表明:经复合溶胶整理的纯棉针织物具有更好的抗紫外效果且经过30次水洗后,抗紫外性能良好;整理后,纯棉针织物的服用性能变化较小,基本上保持了织物原有的风格和性能。     

聚丙烯酸酯/纳米TiO_2复合乳液的制备及应用

采用溶胶-凝胶法制备了纳米二氧化钛(TiO2)溶胶,分别考察了溶剂种类和溶剂用量对纳米二氧化钛溶胶的影响。将制得的溶胶与纯聚丙烯酸酯乳液共混,制备聚丙烯酸酯/纳米TiO2复合乳液,并对复合乳液涂膜的力学性能和耐水性能进行检测。最后将复合乳液应用于皮革涂饰,对涂饰后革样的应用性能进行测试。试验结果表明:采用二乙醇胺或三乙醇胺为溶剂制得的TiO2溶胶较为稳定,随着二乙醇胺或三乙醇胺用量的增加,纳米TiO2溶胶的稳定性变好,同时溶胶与乳液的相容性较好。纳米TiO2溶胶的引入使涂饰后革样的耐水性提高17.06%,透水汽性增加23.87%。     

纳米二氧化钛水溶胶的制备及表征

纳米二氧化钛可用于织物的后整理,使织物具有抗茵、抗静电、抗紫外线的功能.综合溶胶--凝胶法乙酰丙酮和硝酸的抑制水解作用和微乳法表面活性剂的分散效果制备纳米二氧化钛水溶胶.并用ZETAR激光粒度分析仪进行粒度分析,从而得知本实验制得了粒子大小在37～100 nm之间的TiO2水溶胶.     

氧化-丝素肽在山羊绒针织物抗起球整理中的应用

鉴于山羊绒纤维表面结构的特殊性,对山羊绒针织物进行氧化-丝素肽抗起球整理,并通过正交试验得到最佳整理工艺:双氧水预处理工艺为双氧水40mL/L、pH值7、温度50℃、时间50min、焦磷酸钠6g/L;丝素肽处理工艺为丝素肽6%(owf)、pH值9、温度40℃、时间40min.结果表明,氧化-丝素处理后的山羊绒针织物抗起球性得到了明显改善.     

纳米TiO2的抗紫外线整理应用研究

 采用溶胶-凝胶法制备纳米二氧化钛及其整理剂,通过浸—轧工艺将其用于棉织物的抗紫外线整理。用扫描电镜对制得的纳米二氧化钛粒子及整理前、后织物的表面进行了观察,同时测定了整理织物的抗紫外线性能。结果表明,整理后的织物具有优异而耐久的抗紫外线效果,其UPF≥50;UPF值随整理液中二氧化钛的增加而升高;经50次洗涤后,UPF值仍保持在较高的水平,且织物的白度、手感等性能较好。     

纳米TiO2/柞蚕丝素对棉织物的功能整理

用溶胶-凝胶法制备纳米TiO2溶胶,并以该纳米TiO2和柞蚕丝素等的混合溶液对棉织物进行功能整理.用激光粒径仪表征了纳米TiO2溶胶及其柞蚕丝素整理液的粒径分布,测试了整理前后棉织物的抗紫外线性能、润湿性能(接触角)、悬垂风格、白度及撕破强力.结果表明:制得的纳米TiO2溶胶及其柞蚕丝素整理液中纳米粒子的平均粒径分别为13.31 nm和77.90 nm,经纳米TiO2/柞蚕丝素整理的棉织物抗紫外线性能优良,UPF值大幅增加,棉织物的柔软度、悬垂风格及吸湿性得到改善,撕破强力及白度稍有下降.     

纳米二氧化钛及其被覆聚丙烯酸酯分散液的研究

首先,采用钛酸四丁酯为先驱物、无水乙醇为溶剂、冰醋酸为抑制剂、十二烷基苯磺酸钠为分散剂,制备纳米二氧化钛溶胶。然后,将单体(丙烯酸、丙烯酸丁酯、甲基丙烯酸甲酯)慢慢滴加到纳米二氧化钛溶胶中,由过硫酸钾引发单体在纳米二氧化钛溶胶粒子表面发生聚合反应,得到纳米二氧化钛被覆聚丙烯酸酯分散液。接着,使用动态光散射仪分析纳米二氧化钛溶胶粒径及其分布,并利用透射电镜观察纳米二氧化钛被覆聚丙烯酸酯分散液形貌,探讨聚合反应的最佳纳米二氧化钛溶胶单体混合液p H值、反应温度,以及纳米二氧化钛溶胶质量分数对纳米二氧化钛被覆聚丙烯酸酯分散液的成膜性能及形成的膜的透光性的影响。结果表明,制备的纳米二氧化钛溶胶的平均粒径为263.0 nm,聚丙烯酸酯包裹纳米二氧化钛溶胶粒子;聚合反应的最佳反应温度为75℃,最佳纳米二氧化钛溶胶单体混合液p H值为8.0,纳米二氧化钛溶胶质量分数最佳为20.0%。     

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.     

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     

INFOPRINT 2014 was Successfully Held in Dongguan

Sponsored by Printing and Printing Equipment Industries Association of China （PEIAC） and organized by Print China magazine, the Seventeenth Beijing International Printing Information Conference （INFOPRINT 2014） was successfully held on 11th Dec. 2014 at Dongguan Exhibition International Hotel.