制糖过程中泡沫的形成和消泡剂的消泡机理

综述制糖过程中的起泡成分、泡沫形成的条件及泡沫稳定存在的因素。消泡剂的进入系和匍展系数以及憎水颗粒的去润湿 作用，论述了消泡机理。     

ZTF_1型黑液消泡器的改进

ＺＴＦ_１型黑液消泡器的改进在有碱回收的制浆造纸企业中，都存在如何收集泡沫中黑液的问题。如果让泡沫流失，势将降低黑液提取率和碱回收率，并对河流造成严重污染。我厂在１９８６年投产时安装了５台ＺＴＦ１型消泡器（４个黑液槽及１个泡沫槽），经过３年的使用，消...     

风机用于提取段黑液槽消泡的探讨

浅析了常规消泡的方法与效果，描述了风机消泡的实际设计方案。用风机与消泡器结合消泡，黑液内未能自然消除的泡沫借助压差引入黑液槽，用消泡器集中消泡，经消泡器消泡后的残余泡沫用风机抽吸通过气水分离器进一步处理。该方法优点突出，效果明显。     

新型消泡剂在脱墨浆池消泡中的应用

研制了一种新型改性硅油一纳米材料复合消泡剂ZS-0601，考察了该新型消泡剂在广州某纸厂脱墨浆池的消泡效果。改性硅油和纳米材料协同作用，能够快速消泡，并有效的抑制泡沫再生。该系列中ZS-0601b的消泡和抑泡效果都优于该纸厂现用有机消泡剂和另外四种聚醚类及硅油类消泡剂。消泡剂ZS-0601b最佳投药量为2mL／L泡沫。     

浅析谷氨酸发酵生产中泡沫的产生及消除

本篇文章分析了在谷氨酸发酵生产过程中泡沫产生的原因和影响及目前所采用的消泡方式，介绍一种有效的泡沫处理措施，使用后设备利用率可达到90％。     

生物发酵过程中消泡方式的研究进展

生物反应器中不断生成的泡沫和其本身消泡能力的不足会对生物发酵过程造成许多不利影响及经济损失.所以必须采取必要的消泡措施.文中分析了生物发酵过程泡沫产生的原因,对当前一些主要的消泡方式进行了归纳.总结出物理、化学和机械3类消泡方法,并着重介绍了2种机械消泡器的研究现状.最后指出消泡方式的不足、改进措施和将来的研究动向.     

泡沫印花浆的流变性能与印制效果的关系

本文就泡沫印花加工中,泡沫印花浆的流变性能对印花效果的影响作了探索。用流变仪对高粘度的海藻酸钠及DFPP-104醚化植物胶的泡沫浆进行测定,得出流动曲线,由计算机进行回归处理,求出粘度、结构粘度指数,并进行印制效果试验,经实验得出:发泡倍率BR=3.5左右,结构粘度指数为最小,渗透性最好。另外,渗透性随BR、含固量升高而下降。这结论对泡沫印花工艺的发展具有一定的指导意义。     

工业发酵中泡沫控制方法探讨

分析了工业发酵过程中泡沫产生的原因,介绍了化学消泡和机械消泡的作用机理,对常用的化学消泡剂以及不同结构机械消泡装置的消泡效果进行了评价.并在发酵液成分和操作工艺条件方面提出了泡沫控制措施,为工业生产中泡沫的消除提供了参考.     

纸机湿部使用消泡剂的效果

我厂是一个以稻草生产文化用纸的老厂，由于稻草中杂细胞、薄壁细胞多，浆粘度大，滤水性能差，浆料中泡沫很多，严重影响成品质量。我们曾采取了在网案上安置拖布、在流浆箱上面喷淋、往网案上吹热风、在纸料上网系统安装真空消泡箱等措施，均未奏效，只好在网案两侧安装蒸汽管进行蒸汽消泡，这样既浪费了大量蒸汽，同时使操作环境湿度增大，尤其在冬季更加恶劣，直接影响到安全生产。经试验，我们在1575哈巴式短长网纸机和1760长网多缸纸机上试用了FBX－02型消泡剂和FBX－of型抑泡剂获得成功。1使用FBX－02型消泡剂的效果我厂的1575哈…     

浅析泡沫产生的原因及消泡技术

本文就炼油过程中泡沫产生的原因、泡沫的性质、影响因素进行了分析，并对炼油中采用的消泡技术进行了总结。     

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.