多羧酸与纤维素纤维反应机理的分析研究

本以常用的多羧酸整理剂ＣＡ、ＩＡ／ＭＡ、ＢＴＣＡ和纯棉织物为研究对象，采用酸碱滴定和傅里叶红外光谱分析方法，从多羧酸的抗皱效果与酯交联以多羧酸的分子结构与反应活性等研究了多羧酸与纤维素纤维的反应机理。     

多元羧酸BTCA免烫整理现状和发展趋势

随着国内外绿色环保意保的不断增强,无甲醛免烫整理已成为必然发展趋向,ＢＴＣＡ等多元羧酸类化合物是一种目前较有前途的无甲醛整理剂,近年来进展较快,针对多元羧酸无甲醛整理剂,重点介绍ＢＴＣＡ整理的现状,对发展趋势进行了述评,如催化剂和添加剂对改善各种织物性能的研究。提出具体建议。     

商品化的新型高活性PET催化剂

Ａｋｚｏ Ｎｏｂｅｌ,即现在的Ａｃｏｒｄｉｓ开发出一种用于聚酯缩聚的新型高活性催倾剂,这种催化剂命名为Ｃ－９４。该催化剂是一种基于耐水解的钛／硅氧化物,其活性比锑基催化剂高６倍￣８倍,适用于所有的常规生产ＰＥＴ的合成路线;以ＤＭＴ或ＰＴＡ为原料的连续和间歇生产模式。评价了用于生产纤维级和瓶级的ＰＥＴ切片,而且中试表明Ｃ－９４同样适用其他聚酯产品如ＰＴＴ和ＰＢＴ,基于其广泛的应用前景,Ａｃｏｒｄｉｓ     

聚氨酯皮革光亮剂的合成与应用

研究了以端羟基聚醚（２１０聚醚）、三羟甲基丙烷（ＴＭＰ）、甲苯二异氰酸酯（ＴＤＩ）为原料，醋丁纤维素（ＣＡＢ）改性的湿气固化聚氨酯皮革光亮剂（简称ＭＰＵ皮革光亮剂）的合成方法和影响改性产品性能的主要因素。结果表明，当ＮＣＯ／ＯＨ（ｍｏｌ）、ＴＭＰ／２１０聚醚（ｍｏｌ）、ＣＡＢ／ＴＤＩ＋２１０聚醚＋ＴＭＰ（Ｗ）按一定的配比，通过搅拌，且在８０℃下反应４ｈ，即可制得综合性能良好的ＭＰＵ型皮革光亮剂。其产品可适于多种皮革的顶层涂饰。表６，参考文献２     

复合甜味剂(二)

图２　Ｈｉｓ及ＢｌｅｎｄＨｉｓ苦味／后味特性显著特性组成区域分布图１－Ｓｕｒｏｓｅ　２－ＡＰＭ　３－ＴＧＳ　４－ＣＹＣ　５－ＳＡＣ　６－ＡＣＫ　７－ＡＣＫ／ＡＰＫ　８－ＡＣＫ／ＮＨＤＣ　９－ＡＣＫ／ＴＧＳ　１０－ＡＣＫ／ＣＹＣ　１１－ＣＹＣ／ＳＡＣ　１２－ＡＣＫ／ＡＰＭ／ＣＹＣ　１３－ＡＣＫ／ＡＰＭ／ＳＡＣ　１４－ＡＣＫ／ＡＰＭ／ＳＡＣ／ＣＹＣ　　另从表２可见,在苦味、ｂｉｔｔｅｒ－ＡＴ、ｂｉｔｔｅｒ－ＡＴ２、ｏｆｆ－ｆｌａｖｏｒ－ＡＴ这些特性上,所有的Ｈｉｓ、ＢｌｅｎｄＨｉｓ与蔗糖相互间无区别…     

BAT与BOC两种模式CO_2膨胀烟丝生产工艺主要区别

ＢＡＴ与ＢＯＣ两种模式ＣＯ２膨胀烟丝生产工艺主要区别徐维华郭冬青目前世界上应用最为普遍的ＣＯ２膨胀烟丝技术主要有ＢＡＴ和ＢＯＣ两种模式。两者工作原理基本一致，技术水平也很接近。ＢＡＴ技术是在ＢＯＣ早期技术的基础上进行了改进和完善，而ＢＯＣ现有技术也在...     

沙田柚饮料的降血脂作用研究

以８周龄ＢＡＬＢ／Ｃ雄性小白鼠为实验动物，饲以高脂饲料造成实验性高血脂模型，分别灌胃不同浓度的沙田柚汁各１ｍｌ，高脂对照组和空白对照组则灌胃１ｍｌ的生理盐水，饲喂常规饲料，５０天后采尾血测定血清总胆固醇（ＴＣ）、甘油三酯（ＴＧ）、高密度脂蛋白胆固醇（ＨＤＬ－Ｃ）含量和卵磷脂胆固醇酰基转移酶（ＬＣＡＴ）的相对活性，并计算出低密度脂蛋白胆固醇（ＬＤＬ－Ｃ）和极低密度脂蛋白胆固醇（ＶＬＤＬ－Ｃ）浓度及动脉硬化指数ＡＩ（ＴＣ－ＨＤＬ－Ｃ／ＨＤＬ－Ｃ）。结果表明，沙田柚汁饮料能够明显降低实验性高血脂小鼠血清ＴＣ、ＴＧ、ＬＤＬ－Ｃ、ＶＬＤＬ－Ｃ和ＡＩ（Ｐ＜０．０５或Ｐ＜０．０１），并能使ＨＤＬ－Ｃ含量及ＬＣＡＴ相对活性显著升高（Ｐ＜０．０１），由此说明沙田柚汁具有降低血脂、防止动脉粥样硬化的作用。     

热纤梭菌发酵产物的分析

分析了热纤梭菌（ＣｌｏｓｔｒｉｄｉｕｍＴｈｅｍｏｃｅｌｌｕｍ）ＡＴＣＣ２７４０５和ＮＣＩＢＩ１０６８２转化纤维素的产物，研究表明，热纤梭菌转经纯化纤维素的产物主要有酒精，乙酸，还原糖，ＣＯ２和Ｈ２，还原糖成分为木糖，纤维二糖和葡萄糖，经ＡＴＣＣ２７４０５转化后产生的木糖，纤维二糖与葡萄糖的比例为３．３：０．９：１经ＮＣＩＢ１０６８２转化后，则为７．９：３．２：１。     

真丝绸的免烫整理

介绍了用ＴＭＭ和ＢＴＣＡ作整理剂的真丝绸免烫整理技术，比较了两者整理效果。认为ＢＴＣＡ是一种较理想的无甲醛真丝绸免烫整理剂，并提出了进一步提高ＢＴＣＡ整理剂整理效果的方法     

液状阳离子荧光增白剂CH的合成与应用

分析比较了ＫＣＢ、ＢＡＣ、ＮＬ等进口样的合成方法和应用性能后，选择了液状阳离子荧光增白剂ＣＨ的合成路线。采用烯酮与芳香肼缩合成染料ＣＨ，再与阳离子试剂Ｒ＾５Ｘ反应合成阳郭荧光增白剂ＣＨ－１，３－二聚代芳基吡唑类化合物。经腈纶纤维和织物的应用试验：其表面白度、荧光强度、荧光色调及各项应用性能基本达到参比样ＵｖｉｔｅｘＡＭＳ水平，还避免了ＤＣＢ等产品的易产生“黄斑”和“落粉”的弊病。     

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