枸杞蜜奶的稳定剂和配方优选试验

本文对枸杞蜜奶的稳定剂和配方进行优选试验，结果表明：最佳稳定剂为ＣＭＣ０．２％、ＰＧＡ０．１５％和ＧＭ０．１％；最佳配方为枸杞子２％、奶粉４％、蜂蜜３％、柠檬酸０．２％和砂吵糖８％。     

宇佐美曲霉L-336酸性蛋白酶2m~3罐中试发酵研究报告

宇佐美曲霉栗色变种Ｌ－３３６是分泌高单位酸性蛋白酶的生产菌，在摇瓶小试工艺基础上进行２ｍ３罐发酵中试，结果表明：较优发酵培养基（％）为黄豆粉４．３，玉米粉１．０，鱼粉０．７，蚕蛹水解液１０，Ｎａ２ＨＰＯ４０．２，ＣａＣｌ２０．５，ＮＨ４Ｃｌ１．０，豆油１．６；风量为０～２５ｈ时１∶０．４ｖ／ｖ／ｍ，２５～５０ｈ时１∶１．０ｖ／ｖ／ｍ，５０ｈ后１∶１．３ｖ／ｖ／ｍ；接种量１０％，温度３１℃，搅拌转速２００ｒ／ｍｉｎ，发酵周期７５ｈ。在上述条件下，发酵酶活力稳定在５５００ｕ／ｍｌ左右。     

β—葡聚糖酶高产菌株的选育及发酵条件的研究

从土样中筛选到一株产β－聚精酶的曲霉ＦＳ６８野生菌株,经ＵＶ,ＮＴＧ等五代诱变,获得变株ＦＳＵＮ－５１。对该菌株产酶条件优化实验结果表明：最佳培养基配方（％）：大麦粉５,黄豆饼粉 ２, ＦｅＳＯ_４· ７Ｈ_２Ｏ ０． ０１, Ｎａ_２ＨＰＯ_４ ０． １, ＣａＣＯ_３ ０． ５, ＭｇＳＯ_４ ０． ０３, ＮａＮＯ_３ ０． ４;最适的发酵条件为产酶ｐＨ为６．５,温度为３１℃,在２５０ｍｌ三角瓶中装量为２５ｍｌ,发酵周期为７２ｈ,摇瓶相对酶活比野生菌株提高６９％。     

黄粉虫蛹水解蛋白发酵营养液的研制

对黄粉虫蛹蛋白的水解条件,水解液的发酵条件为发酵液的稳定性进行了研究。结果表明：水解的最佳条件为固液比５：２５,酶用量３．０％,酶解温度５０℃,酶解时间５．５ｈ,酶解ＰＨ值６．６４;水解液的发酵条件为：接菌量４．０％,发酵温度４１℃,发酵时间４．５ｈ;发酵液中添加ＣＭＣ－Ｎａ０．１％,黄原胶０．１５％稳定性最佳     

L-苹果酸产生菌黄曲霉Aspergillus flavus H-98发酵特性的研究

报道了Ｈ－９８菌株发酵Ｌ－苹果酸的特点,研究了碳源、氮源、温度、ＣａＣＯ３、金属离子、促进剂和抑制剂等因素对Ｈ－９８菌株苹果酸发酵的影响,并综合考察培养基配方对产酸的影响,确定了Ｈ－９８菌株的最佳发酵条件,其中最适碳源为１０％葡萄糖,最适氮源为０．２５％（ＮＨ４）２ＳＯ４,ＣａＣＯ３浓度为７％。生物素、丙氨酸和Ｍｎ２＋在一定浓度范围内能显著提高Ｈ－９８菌株的产酸水平,使该菌株的产酸超过５０ｇ／Ｌ。     

绿豆乳酸菌饮料稳定性的研究

本文从绿豆淀粉的糖化、饮料的均质和添加稳定剂等三个方面对绿豆乳酸菌饮料的稳定性进行了研究。实验选用的α－淀粉酶的最适ｐＨ值为６．５～７．０，最适底物浓度为３０％，最佳糖化条件为７０℃、１００ｍｉｎ。绿豆乳酸菌饮料的最佳稳定条件是：ＰＧＡ添加量０．２％；ＣＭＣ添加量０．２％；发酵豆乳的终点ｐＨ值为４．１～４．２；豆乳浓度为１∶１０；２０ＭＰａ压力下均质两遍。     

核蛋白和鱼精蛋白提取工艺的研究

研究提取淡水鱼精巢中的核蛋白和鱼精蛋白的工艺条件,采秀正交试验法,通过筛选,确定了提取核蛋白的最佳工艺条件为：ＮａＣｌ浓度为１．０ｍｏｌ／Ｌ,ＮａＣｌ用量为１０倍,提取时间１ｈ,９５％乙醇用量为２倍,提取鱼精蛋白的最佳工艺条件为：Ｈ２ＳＯ２浓度为５．０％,Ｈ２ＳＯ４用量为３倍,提取时间２ｈ,９５％乙醇用量为３倍。     

芦笋汁的制备工艺研究

利用芦笋罐头、速冻芦笋生产中的下脚料可以加工成营养丰富、品质优良的芦笋汁饮料．研究结果表明：最佳杀青条件为，在９６℃０．１％的柠檬酸水中杀青３ｍｉｎ，采用琼脂－ＣａＣＯ３法澄清芦笋汁效果最好，添加０．１％～０．３％的β－环状糊精可使芦笋苦味明显降低或消失；产品最佳配方为，原汁１５％，蔗糖８％，β－环糊精０．３％，ｐＨ＝３．９．     

马铃薯奶饮料生产工艺的研究

采用正交试验对马铃薯奶饮料的生产工艺及最佳工艺条件进行了研究。结果表明：马铃薯经去皮、预煮、破碎后,加５倍水,在９０℃下糊化４８ｍｉｎ,再加入０．３％的混合稳定剂（０．１％琼脂、０．１％黄析胶、０．１％ＣＭＣ－Ｎａ）,５％的脱脂牛奶,８％的白砂糖调配,然后装灌、密封,在１２１℃下杀菌２０ｍｉｎ,便可获得营养价值高、口感好,价格人氏廉的马铃薯奶饮料。     

咸味型八宝粥罐头加工及稳定性研究

本研究以糯米、麦片、火腿肉、赤豆、花生仁、核桃仁、红枣、枸杞为原料，运用正交试验优选出入宝粥四种主要原料的最佳百分配比为糯米：麦片：赤豆：火腿肉：３．０％：２．５％：１．０％：３．０％。稳定性研究表明，琼脂－ＣＭＣ－Ａ复事百分配比为０．１％－０．１５％－０．１％对咸味型八宝粥稳定效果最好；合理的蒸煮杀菌公式为５′－５５′－５′／１２１．２℃。     

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