超临界CO2萃取姜黄油的工艺研究

本运用均匀试验设计研究了超临界CO2流体萃取姜黄油的工艺条件，试验结果表明：最佳的萃取工艺条件为萃取压力36MPa，萃取温度50℃，CO2流量15kg／h，萃取时间3h。     

超临界CO2萃取樟树籽油脂的实验研究

对超临界CO2萃取樟树籽油的工艺进行了研究，探讨了萃取压力，萃取温度和CO2流量对樟树籽油萃取的影响，在萃取压力20MPa、萃取温度40℃、CO2流量35kg/h条件下，萃取2h，樟树籽油的萃取率可达94．3％。     

超临界CO2萃取姜黄油的工艺及其数学模型的研究

运用均匀试验设计研究了超临界CO2流体萃取姜黄油的工艺条件，试验结果表明；最佳的萃取工艺条件为萃取压力36Mpa，萃取温度50℃，CO2流量15kg／h，萃取时间3h。在分析萃取机理的基础上建立了初步的数学模型。     

碱蓬籽油的超临界CO2流体萃取及其GC/MS分析

应用超临界CO2萃取技术，研究了碱蓬籽油的提取工艺，采用四因素三水平正交试验，考察了压力，温度，萃取时间、CO2流量四因素对碱蓬籽油萃取率的影响，研究得出最佳萃取条件为：压力25MPa，温度42．5℃，时间3h，CO2流量25kg/h。利用GC／MS分析了碱蓬籽油的组成成分，比较了超临界CO2萃取油样和乙醚萃取油样的理化性质。     

核桃油的超临界CO2流体萃取及其GC/MS分析

应用超临界CO2萃取技术，研究了核桃油的提取工艺。采用三水平四因素正交试验，考察了压力、温度、萃取时间、CO2流量对核桃油萃取率的影响。最佳萃取条件为：压力30MPa，温度50℃，时间4h，CO2流量25kg／h，在此条件下核桃油的萃取率可达52．4％。利用GC／MS分析了核桃油的组成成分，比较了超临界CO2萃取核桃油的油样和乙醚萃取核桃油的油样的理化性质。     

葡萄籽油超临界流体萃取工艺

研究了温度、压力、时间、CO2体积流量对超临界流体萃取葡萄籽油得率的影响,并进行了最佳工艺优化.结果表明,影响CO2流体萃取葡萄皮精油效率因素的主次作用为萃取时间＞萃取压力＞萃取温度＞CO2体积流量,最佳工艺条件为萃取时间4 h、萃取温度45 ℃、CO2体积流量8 L/h、萃取压力30 MPa.葡萄籽油出油率为14.8%.     

超临界CO2萃取花椒油树脂的研究

研究了萃取花椒油树脂的工艺，通过单因子实验和正交实验优化了超临界CO2萃取花椒油树脂的最佳工艺条件：原料粒度60目，流量25L／h，萃取时间2h，温度40℃，压力20MPa。     

超临界CO2流体萃取技术提取红花籽油的研究

通过超临界CO2流体萃取红花籽油的试验，研究了物料的粉碎度、萃取压力、萃取温度、萃取时间对红花籽油萃取效果的影响。结果表明，超临界CO2流体萃取红花籽油的最佳工艺条件为粉碎度30目、萃取压强30MPa、萃取温度40℃、萃取时间2h。     

马尾藻的超临界CO2脱脂工艺研究

研究了超临界CO2萃取压力、萃取温度、萃取时间对马尾藻脱脂过程的影响。结果表明,CO2的流量为20L/h时,超临界CO2脱脂的最佳工艺条件为:萃取压力45MPa,萃取温度55℃,时间4h,萃取率为8.07‰。     

超临界CO2萃取白豆蔻挥发油的工艺优化及其动力学研究

目的:优化超临界CO2萃取白豆蔻挥发油的工艺条件,并建立萃取的动力学模型。方法:采用正交试验确定萃取的最优工艺条件;根据质量衡算微分模型,运用Fick第一定律,建立萃取的动力学模型。结果:超临界CO2萃取白豆蔻挥发油的最优工艺条件为CO2流量22L/h、萃取温度50℃、萃取压力28MPa、萃取时间3.0h,此时得率为2.92%;E=3.11×(1-e-0.8859t)为超临界CO2萃取白豆蔻挥发油的动力学模型方程,该动力学模型能很好地模拟萃取的过程。结论:超临界CO2萃取白豆蔻挥发油可行。     

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.