自由脱开气圈的形成及其理论分析

提出并论证了从自由脱开气圈的角度分析储丝盘出口到导丝钩的丝线形态及张力的新方法。该方法明确求出从储丝盘出口到导丝钩丝线的形态、张力与机构尺寸的对应解，从而为适应不同加捻要求，优化锭盘形状提供了多方面精确解的可能。     

气圈形态及张力与倍捻机气圈类型分析

提出用三个特征参数描述气圈形态的方法，并选择出能够最有效反映变化的形态特征参数。利用气圈的形态和张力的关系，分析了倍捻机气圈的三种类型。     

倍捻锭气圈动力学-气圈与锭盘丝线的形态与张力

论述丝织准备工艺中的真丝，化纤倍捻机锭子高速回转时的气圈形态和张力分布，讨论丝线细度，锭子转速，气圈高度，空气阻力系数等因素对气圈形态及张力分布的影响，对从储丝盘出口到导丝钩丝线的受力情况作较深入的分析，利用柱面坐标系，导出求解储丝盘，锭盘缠绕段丝线和自由气圈空间形态及张力的无量纲微分方程组。     

倍捻的原理及倍捻机的主要技术参数

介绍了倍捻的原理,倍捻机的主要结构、工艺参数及性能。对气圈的张力及影响张力的因素亦作了分析。     

直倍捻机节能技术探讨

阐述直捻机或倍捻机通过减小气圈形态来达到节能目的的观点,分析直倍捻工艺中形成气圈的必要条件以及影响气圈大小的因素,探索通过改进现有直捻机或倍捻机技术中的锭子组件的方法,对锭罐、加捻盘和储纱盘的结构及尺寸进行优化设计,从而减小气圈形态,达到节能降噪的目的。     

意大利TDS-228F倍捻机主要性能及工艺探讨

介绍了意大利TDS-228F倍捻机主要性能、工作原理及主要机构作用，探讨了工艺参数，确定合理捻系数，选择合适的纱线张力、卷绕密度、留头纱角度值，阐明了提高毛纱质量的方法。     

VTS-09型倍捻机的应用实践

介绍了VTS-09型倍捻机的结构特点、倍捻原理和纱线张力情况,分析了车速、张力装置、垫圈质量、纱线气圈对储纱长度的影响,并从工艺设置、操作管理、设备维修和产品质量等方面叙述了应用实践过程.     

论衬锭捻丝机加捻张力的变化特性

本文建立了一个由退解因子,气圈因子,作用于衬锭垂直方向的空气阻力矩和衬锭重力的摩擦阻力矩组成的衬锭捻丝机加捻张力的实用公式。这四个因子的前二者构成分母,后二者构成分子。文中指出气圈因子基本上是常数,使加捻张力发生周期性变化的退解因子与筒子瞬时退解半径及退解高度相关。衬锭的尺寸(直径、锭翼对数和长度)对张力的作用大于衬锭重力,从公式求得的数据接近于实际,可供工厂、研究单位和学校参考.     

倍捻锭气圈动力学方程的求解

探讨丝线在形成自由气圈之前，由退解筒子经过衬锭、张力器、储丝盘的丝线张力数学模型，并用计算机编程求解气圈微分方程及讨论各参数对气圈形态与张力的影响。     

A512型细纱机叶子板升降卷绕链轮的改进

选择适当的叶子板升降全程,以满足大纱阶段必要的气圈高度,使气圈不致过于平直;压缩小纱阶段的气圈高度,使气圈不致过大,减少张力及其变化,达到减少大、小纱断头的目的。生产实践证明,细纱机中纱阶段因气圈适宜,张力稳定,其断头比大、小纱时要减少.因此,我们在分析 A512型细纱机卷绕机构运动的基础上,对部分结构进行了改进,并改革了卷绕链轮,使大纱断头有所降低。一、机构动作简述采用大卷装长成形后,必然会带来大纱与小纱时由于气圈过大或过小,张力不适而增加断头。为此制造厂为了更好地控制大、小纱阶段适宜的气圈高度,设计了     

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.