活性染料大豆纤维/棉混纺织物的染色研究

在大豆纤维和棉纤维的ED型活性染料染色工艺研究的基础上，探索大豆纤维／棉混纺织物同色染色的工艺条件。研究结果表明，ED型活性染料染色时，元明粉用量可适当增加，但纯碱用量不宜过多，染色温度控制在65℃。大豆纤维与棉同浴染色时，可采用醋酸来调节pH值，以提高两种纤维的同色性。     

德绒/棉混纺织物的一浴一步法染色北大核心

选用中性固色活性染料和分散型阳离子染料,对德绒/棉混纺织物进行一浴一步法染色探究。试验表明,德绒/棉混纺织物一浴一步法染色是可行的,其优化工艺为:硫酸钠25 g/L,渗透剂JFC 0.5 g/L,染浴p H值7,染色温度100℃,染色时间60 min。染色后的混纺织物,表观颜色鲜艳,匀染性较好,但因为染色过程中阳离子染料对棉纤维、活性染料对德绒纤维存在一定的沾色情况,混纺织物染色时的上染率相对单组分纤维染色而言有所降低。     

德绒/棉混纺织物的一浴一步法染色

选用中性固色活性染料和分散型阳离子染料,对德绒/棉混纺织物进行一浴一步法染色探究。试验表明,德绒/棉混纺织物一浴一步法染色是可行的,其优化工艺为:硫酸钠25 g/L,渗透剂JFC 0.5 g/L,染浴p H值7,染色温度100℃,染色时间60 min。染色后的混纺织物,表观颜色鲜艳,匀染性较好,但因为染色过程中阳离子染料对棉纤维、活性染料对德绒纤维存在一定的沾色情况,混纺织物染色时的上染率相对单组分纤维染色而言有所降低。     

PTT/棉混纺织物分散/活性-浴染色工艺

根据两种纤维的不同特性,选择可在不同pH值条件下染色的分散染料及耐高温低盐的活性染料对PTT/棉纤维混纺织物进行一浴(一步或二步)法染色,不仅工艺简单、匀染性好,且有利于提高生产效率.     

大豆蛋白复合纤维/羊毛混纺织物染色探讨

为了解决因大豆蛋白复合纤维和羊毛的物理化学性能和染整加工性能的差异而导致的染色同色性差的问题,采用酸性染料、中性染料、毛用和棉用活性染料对大豆蛋白复合纤维/羊毛混纺织物进行染色研究,着重探讨了Everzol ED型活性染料对大豆蛋白复合纤维/羊毛混纺织物的染色性能.结果表明:Everzol ED型活性染料适合于大豆蛋白复合纤维/羊毛混纺织物的染色,同色性较好,但对工艺条件的要求比较严格.     

大豆纤维/羊毛混纺产品加工与活性染料染色

介绍了大豆纤维/羊毛混纺针织物和机织物的纤维原料组成和产品加工方法,着重讨论了大豆纤维/羊毛混纺产品的活性染料染色性能和同色染色方法.根据不同毛纺织品的要求,可选用散纤维、毛条、纱线、织物及成衣染色加工方法,纱线或匹染产品采用漂白大豆纤维再混纺为宜.该类产品采用经筛选的棉用型活性染料(如Everzol ED),并通过染色温度和酸碱度的合理控制,可实现一浴一步法同色染色.     

PTT/棉混纺织物分散/活性一浴染色工艺

根据两种纤维的不同特性,选择可在不同pH值条件下染色的分散染料及耐高温低盐的活性染料对PTT/棉纤维混纺织物进行一浴(一步或二步)法染色,不仅工艺简单、匀染性好,且有利于提高生产效率。     

染色工艺对PLA/羊毛混纺制品同色性的影响

文章研究了适用于PLA纤维的分散染料和适用于羊毛的活性染料在PLA/羊毛混纺制品-浴染色条件下的相容性,分析了各染色工艺因素对-浴染色同色性的影响规律,确定了合适的PLA/羊毛混纺制品的-浴同色染色工艺条件.结果表明:分散染料和Lanasol活性染料及其配套助剂在PLA/羊毛混纺制品-浴染色条件下具有良好的相容性;适宜的-浴法染色工艺条件为:染浴pH值5左右,染色温度100℃,染色保温时间为40～60min,70℃以前的升温速率2～3℃/min,70～100℃升温速率1～2℃/min.     

涤/棉交织物一浴法轧染工艺

针对涤/棉交织物染色工艺流程长,耗水耗能大,碳排放量和废水排放量高等问题,研究了涤/棉交织物分散/活性染料一浴两步法轧染工艺。通过分析分散/活性混合染液在不同pH值条件下的稳定性,探讨了焙烘温度、焙烘时间、染浴pH值、固色碱种类与质量浓度、汽蒸时间等对分散蓝79以及K型、KN型、M型活性染料染色效果的影响,并对一浴两步法轧染工艺和两浴两步法工艺产生的能耗进行计算和比较。结果表明:一浴两步法染色织物可以获得与传统染色工艺相同的颜色深度,耐摩擦色牢度以及耐皂洗色牢度可以达到4~5级;以分散蓝79和活性蓝19为例,相比于传统两浴两步法轧染,每染色1万m涤/棉交织物,一浴两步法轧染工艺可减少45.5%的水耗、20.9%的电能消耗、41.7%的热能消耗、40.6%的CO₂排放。     

涤／棉混纺织物全料染色法活性染料的选择

1引言 不同比例的涤/棉混纺织物是应用最为广泛的纺织品。而这两种纤维组分的物理和化学性质相差很大,所以它们只能用各自完全不同的染料和工艺进行染色。 传统工艺用两浴两步法对涤/棉混纺织物进行染色,即在酸性条件下用分散染料染涤纶,而在碱性条件下用活性染料染棉。这种染色工艺不易造成色泽不匀或对上染率带来不利影响。     

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.