钢丝热处理收线机组改造与节能

根据收线机组对调速电机的要求 ,利用原收线机组的蜗轮传动机构 ,合理配置调速电机输出轴与收线机传动轴之间的速比 ,可充分发挥调速电机的能力。通过钢丝热处理收线机组的改造 ,减少了拖动电机的维护费用 ,显著降低了能耗 ,达到了节能的目的。     

纺织厂空调的节能设计与节能运行

探讨了纺织厂空调的节能设计和节能运行,通过合理运用除尘风作为前纺空调的二次回风、细纱工艺排风作为筒子空调的一次回风、增强空调室热湿交换的设计及合理的喷嘴布置、水泵流量配置等节能方案;运用变频调速、双速电机、新型节能设备等节能新技术新设备;在严格执行节能操作、节能调节、分时段调整送风机转速、停开空调室的节能运行情况下,纺织厂空调的节能设计和节能运行达到了节约能耗、降低生产成本的目的。     

企业“能效电厂”建设的内容和途径

2.3高效节能电动机与变频调速节电技术 2.3．1高效节能电机 高效节能电机是指通用标准型电动机具有高效率的电机。高效节能电机从设计、材料和工艺上采取措施，例如采用合理的定子、转子槽数、风扇参数和正弦绕组等措施，降低损耗，效率可提高2％～8％，平均提高4％。     

粗纱机吹吸风系统的优化设计

为了进一步提高粗纱机产品质量,减少产品疵点,从使用效率、相互配合运行、工作方式等方面分析了国内外现代粗纱机普遍采用的吹吸风设计模式及其存在的问题,针对现有粗纱机吹吸风系统存在的清洁不彻底、能耗高等不利因素,提出了改进思路。详细介绍了吸吹风优化系统的设计原理,电气控制系统及车尾风机技术性能参数的选择;对比了优化前后的节能效果和经济效益。指出:优化设计的粗纱机吹吸风系统,通过改进电气控制、重新设计吹吸风管路并对车尾风机进行改造,在不影响产品质量的前提下提高吹吸风效果,节能效果较明显。     

离心喷雾干燥设备的变频节能改造

对传统离心喷雾干燥设备的能耗进行了分析,提出了变频调速技术在节能改造中的意义.并结合某单位的离心喷雾干燥设备,采用变频器和PLC对它进行节能改造.生产实践表明:离心喷雾干燥设备经过改造后,达到了提高系统性能和节能的目的,经济效益和综合效益显著.     

交流变频节能技术在绳状练漂机上的应用

介绍了交流变频节能技术在印染联合机上应用实例，在电源系统、同步线路、拖动电机等方面将交流变频调速拖动与直流共电源调速拖动作了能耗对比，说明推广交流频节能技术有着显著的经济效益和较好的社会效益。     

FA425型粗纱机生产运行分析

FA425型粗纱机是由石家庄太行机械厂生产的，该机是在FA421型和在FA423型粗纱机基础上，吸收了国内外多种新型粗纱机的特点而设计的具有国际九十年代先进水平的粗纱机。它采用了当代最先进的传感器、微电脑、变频调速等电子技术，取消了成型机构，上下锥轮及锥轮皮带自动复位机构等装置，采用主电机与变速电机分别传动，由计算机实现同步控制。     

悬锭粗纱机节能技术探讨

探讨悬锭粗纱机的节能技术。通过从纺织工艺、机械结构、电气控制三方面进行理论探讨,并通过试验和实践提出:采用翼导卷绕方式、节能型无纱疵悬锭锭翼、有差动机构的筒管传动路线、下清洁开放式集棉装置、双闭环控制、直流母线共用等技术,可以降低悬锭粗纱机的装机容量和能耗。     

基于ARM的抽油机节能控制系统的设计

针对抽油机消耗电能大的问题,本文提出了一种基于ARM的抽油机节能控制系统的设计方案。设计方案综合使用嵌入式系统设计、电机控制技术等多项技术,采用变频调速的方法实现节能,改变传统抽油机轻、满负载都工作在额定功率下的情况,实现电机转速随电机负载增减而增减,使抽油机工作在一个节能的合理的状态。本设计方案可达到出油量大,节能以及延长抽油机电机使用寿命的效果。     

基于交流调速永磁同步电机技术对潜水泵的节能 改造

基于永磁电机技术对灌溉用7.5k w潜水泵进行改造,实现节能目的.阐述利用有限元等手段对电机改造的设计过程,通过实际测试,证明改造后节能效果明显.     

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