有机硅改性酪素皮革涂饰剂的合成与应用

本文提出了用含端基氮丙环(-NCH2CH2)的有机硅氧烷与酪素结构中的氨基(-NH2)、羧基(-COOH)反应,提高改性酪素的耐水、耐曲挠、耐摩擦等综合性能的新方法,该改性产品在多种鞋面革中进行了涂饰实验.     

密胺树脂改性酪素皮革顶涂剂的合成与应用

通过密胺树脂的羟甲基(-CH2OH)与酪素中的氨基(-NH2)、亚氨基(-NH-)、羟基(-OH)、羧基(-COOH)缩合交联，提高酪素的耐水、耐磨、耐碰擦等综合性能。并对密胺树脂改性酪素的机理及应用进行探讨，从而提出了一种新的有价值的酪素改性方法。     

密胺树脂改性酪素皮革顶涂剂的合成与应用

通过密胺树脂的羟甲基(-CH2OH)与酪素中的氨基(-NH2)、亚氨基(-NH-)、羟基(-OH)、羧基(-COOH)缩合交联,提高酪素的耐水、耐磨、耐碰擦等综合性能.并对密胺树脂改性酪素的机理及应用进行探讨,从而提出了一种新的有价值的酪素改性方法.     

酪素的改性及改性产品的性能

本文选用不同的单体及配比对酪素进行了改性。研究了反应条件、单体种类和单体的配比对改性产品的质量影响。同时，对改性酪素的成膜性能、涂饰应用性能进行了研究。结果表明：通过对酪素改性，提高了其成膜性能，得到了软性和硬性酪素产品。改性酪素应用于猪服装革的涂饰，涂层耐干、湿擦及耐折牢度均达到要求。     

改性酪素涂饰剂的研究现状

本文总结了酪素成膜剂的优缺点，探讨了由于制革工业的需要而对酪素进行改性的物理方法和化学方法，详细论述了对酪素涂饰剂进行化学改性的研究进展、在皮革涂饰巾的应用及其牛物可降解性，并展望了改性酪素涂饰剂在制革工业中的应用前景。     

氧化石墨烯改性酪素皮革涂饰剂的制备及性能

使用双丙酮丙烯酰胺(DAAM)为交联单体,以氧化石墨烯(GO)对酪素进行接枝改性,得到了力学性能好,耐湿擦等级高的改性酪素。探讨了GO用量对酪素改性效果的影响。采用FT-IR和AFM对制备的GO进行了表证,表明制得的GO富有含氧基团(C=O、-OH、-COOH、C-O-C等)且具有较好的稳定性;力学性能测试表明,当DAAM用量为30%、GO用量为0.5%时,改性酪素的拉伸强度、断裂伸长率以及耐湿擦性能均达到最优。     

羟甲基丙烯酸树脂改性酪素皮革顶涂剂合成与应用的探讨

通过羟甲现烯酸树脂与酪素中的氨基，亚氨基，羧式，羟基缩合并联，提高酪素成像的耐曲挠，耐水等综合理化性能。并对羟甲基丙烯酸树脂改性酪素的改性机理及其应用进行了探讨。从而提出了一种最新最有价值的酪素改性方法。     

纳米TiO2改性明胶在合成革后整理中的应用

采用原位有机-无机杂化技术将纳米TiO2引入明胶体系,制备了纳米TiO2的改性蛋白材料,通过扫描电镜(SEM)发现,原位生成的TiO2颗粒直径都在100 nm左右,相对未经改性的明胶具有良好的耐热稳定性.将改性明胶应用于合成革的后整理中,且与传统酪素涂饰的成革在透湿性、表面接触角和抗菌性能等方面的比较研究,结果表明:加入改性明胶涂饰后的成革的透湿性与酪素涂饰后的成革相当;并且由于改性明胶亲水基团的增加,表面接触角与酪素的相当,降低了表面张力,改善了再涂性;经改性明胶涂饰后的合成革还具有良好的抗菌性,这是酪素所不具备的.充分说明改性明胶可以取代酪素在合成革后整理中的应用.另外,改性明胶价格低廉、易于制备,这对促进行业技术进步,提高企业经济效益都有积极的意义.     

改性酪素涂饰剂的研制及应用表征

通过正交试验,用己内酰胺和丙烯腈等,对酪素进行改性,研究了改性酪素的成膜性能,并将所得的改性酪素应用于成品革的涂饰,结果表明:改性反应较适宜温度75℃、酪素浓度16%、单体用量50%,改性酪素较酪素涂饰的皮革成品耐折性优良、柔软性好,克服了酪素成膜硬、不耐湿擦、易发生变质等不足。     

皮革涂饰用酪素及其改性产品

本文论述了酪素的基本性质及其改性方法，交例举一例用乙烯基单体改性酪素的实例     

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