梳棉机附加吸风装置与棉杂短绒的排除

简述了高产梳棉机附加吸风装置的发展历史，分别介绍了特殊吸风装置的种类、结构和在提高生条质量、减少生条棉结杂质中的作用。通过对该装置研究重点的剖析，论述了吸风装置的数量、位置、吸风量的配置及各有关参数对除杂效果的影响。     

梳棉机静电特殊吸风装置的试验研究

在梳棉机后罩板处加装了带有静电板的特殊吸风装置 ,用Afis单纤维测试系统测试了在不同电压下生条的短绒、棉结、杂质情况 ,试验结果表明 ,加装带有静电板的特殊吸风装置 ,与不加装静电板的特殊吸风装置相比 ,生条重量短绒SFC(w)减少了5 6%～ 8 3 % ,根数短绒SFC(n)减少了 4 6%～ 6 7% ,棉结减少了 10 %～ 13 3 % ,杂质减少了 3 3 % ,异物率 (VFM)下降 14 3 %。但该系统对带籽屑棉结 (SCN)去除没有效果。     

梳棉机带吸风装置的后固定盖板系统对成纱质量的影响

在下列条件下对A186F梳棉机进行了对比试验：梳棉机原有状态不变；梳棉机后罩板加装带有吸风装置的后固定盖板系统，单侧吸风；梳棉机后罩板加装带有吸风装置的后固定盖板系统，双侧吸风。试验表明：加装带有吸风装置的后固定盖板系统对生条含杂和异物率改善有一定效果；在单侧吸风时对成纱质量改善不大，而双侧吸风时改善较为明显。     

改进的静电吸风装置对梳理质量的影响研究

在高产梳棉机上,都加装有吸风装置,用来及时除杂和排除短纤维.在对静电吸风装置进行改进的基础上,在不同电压下检测生条的质量,以确定静电压对成纱质量提高的影响.     

FA224梳棉机锡林速度对生条结杂短绒的影响

为了了解锡林速度对生条结杂短绒的影响,在一定的工艺设备条件下,纺制了不同锡林速度的生条,通过对这些生条的测试可知：锡林转速对生条质量影响明显,转速提高后,生条棉结、杂质有减少的趋势,生条中短绒数量也有降低的趋势,生条质量得到了改善。     

梳棉机预分梳对梳理质量的影响

在梳棉机后罩板处加装带有固定盖板的吸风装置,在刺辊下采用只加小漏底、锯齿分梳板和小漏底、梳针分梳板和小漏底三种配置,在三种不同条件下进行刺辊不同速度的对比试验.结果显示,当刺辊预分梳加强时,附加吸风装置排除短绒和杂质的能力加强,生条和成纱质量也有所提高,其中,刺辊速度采用1080r/min时,加装锯齿分梳板优于加装梳针分梳板,刺辊速度采用1470r/min时,加梳针分梳板优于加装锯齿分梳板,试验还证明,梳针分梳板对于减少杂质破碎有利.     

FA224梳棉机出条速度对生条结杂短绒的影响

为了了解出条速度对生条结杂短绒的影响,在一定的工艺设备条件下,纺制了不同的出条速度的生条,通过对这些生条的测试可知:出条速度对生条质量影响明显,出条速度提高后,生条棉结、杂质有增加的趋势,生条中短绒数量也有增大的趋势,生条质量恶化。     

141—3型臣式定网集绒装置

集绒装置根据其结构的不同，集绒的数量和绒的质量有一定的差别。集绒装置的不同，对整个剥绒－集绒系统的用电消耗量，将有所不同。这方面也直接影响着企业的效益。     

棉纺精梳胶辊绕纤的收集与测试分析

为了减少棉纺生产过程中的三绕问题,分析各工序产生绕纤的原因,介绍两种收集绕纤的方式即吸风收集和绒面材料收集,通过AFIS测试棉纺各工序的绕纤,在长度、成熟度、线密度及结杂等方面进行绕纤对比,并对细纱绒辊花进行深入分析,阐述绕纤的来源和形成机理。指出:未成熟纤维和短纤更易成为绕纤,静电吸附是绒辊花中短绒含量高的主要原因;在高速、连续化生产背景下,可从降低牵伸器材工作温度、静电吸附及改善纤维性能为主要研究方向,降低绕纤。     

A272型并条机绒套的改进

Ａ２７２型并条机绒套的改进Ａ２７２型并条机上绒套是采用积极传动形式、被称为“欧门式”的清洁装置。该装置设计比较合理，通过间歇转动的绒布擦净胶辊上的杂质、短绒，往复运动的清洁梳片将短绒、杂质刮下，再由吸风嘴吸走。但由于清洁梳片的重量较轻加上偏心连杆几处...     

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