亲水胶体对低脂肉糜加热稳定性的影响

研究了四种亲水胶体对低脂肉糜加热稳定性的影响.结果表明:四种亲水胶体的最佳配比为大豆分离蛋白2.0%,魔芋精粉2.0%,黄原胶0.5%,卡拉胶0.4%,按此最佳配比添加于肉糜中,在80℃下,加热1.5 h,加热稳定性好.感官品质佳.     

亲水胶体对肉糜凝胶强度和持水性能的影响

将几种不同的亲水胶体复配后应用于低脂肉糜中,通过对肉糜凝胶强度和持水性的测定,筛选出一种复配型亲水胶体作为脂肪替代品。结果表明:复合亲水胶体的最佳配方为大豆分离蛋白2.5%,魔芋精粉1.0%,黄原胶0.2%,卡拉胶0.3%。按此最佳配方添加于肉糜中,添加水量35%,在100℃下加热1.5h,肉糜综合性质较佳。     

亲水胶体对低脂肉糜性质的影响

将几种不同的亲水胶体复配后应用于低脂肉糜中，通过对肉糜凝胶强度和持水性的测定，筛选出一种复配型亲水胶体作为脂肪替代品。结果表明：复合亲水胶体的最佳配方为大豆分离蛋白2．5％，魔芋精粉1.0％，黄原胶0．2％，卡拉胶0.3％。按此最佳配方添加于肉糜中，添加水量35％，在100℃下加热1．5h，肉糜综合性质较佳。     

魔芋豆腐凝固条件的研究

对形成魔芋豆腐的条件进行了探索,发现魔芋精粉的浓度3%、加碱量0.03%、加热时间120min和凝固温度90℃时魔芋豆腐的硬度、持水量、色泽等品质最佳。另外发现,通过添加卡拉胶、黄原胶等食品胶可以提高魔芋豆腐的弹性及持水量。     

复合天然添加剂对速冻水饺抗冻裂效果的影响

冻裂是速冻水饺主要质量问题,为提高速冻水饺的品质,研究了谷朊粉、魔芋精粉、大豆蛋白粉、黄原胶这几种天然添加剂对速冻水饺冻裂率的影响。结果表明:天然添加剂的复配使用具有更好的抗冻裂效果,其最佳复合配方为:谷朊粉3.00%,魔芋精粉0.50%,大豆蛋白粉5.00%,黄原胶0.20%。     

南瓜魔芋果冻的工艺配方研究

以南瓜和魔芋精粉为主要原料研制一款风味独特、色泽诱人、口感Q弹的南瓜魔芋果冻,通过实验确定了南瓜魔芋果冻的最佳配方为南瓜汁35%,复合胶凝剂(魔芋胶:卡拉胶:黄原胶=3:2:1)添加量1.0%;白砂糖8%;柠檬酸0.4%。     

功能性添加物对宁乡花猪肉丸质构的影响研究

通过单因素试验与响应面分析法研究燕麦麸、魔芋胶和大豆分离蛋白添加量对宁乡花猪肉丸质构的影响,以燕麦麸、魔芋胶和大豆分离蛋白添加量为试验因子,以肉丸质构特性作为响应值,采用中心组合设计的方法,对宁乡花猪肉丸中添加燕麦麸、魔芋胶和大豆分离蛋白的最佳配方进行优化,建立了二次多项式预测模型。结果表明:优化后的最佳工艺条件为燕麦麸添加量6%,魔芋精粉的浓度0.8%,大豆分离蛋白添加量为2.5%。     

高弹性素食肠配方优化

目的：开发一种营养美味、弹性好、品质优良的素食肠。方法：以大豆拉丝蛋白（FSDP）为主要原料,在基础配方上,以素食肠的弹性为考察指标,采用响应面分析法优选谷朊粉、谷氨酰胺转氨酶（TGase）、大豆分离蛋白粉、羟丙基二淀粉磷酸酯（HDP）、复合胶、冰水的添加比例。结果：以泡发后的大豆拉丝蛋白（含水量61.54%）为基准,除加入大豆油、羧甲基纤维素钠、食盐、白糖等基础配料外,再添加124.06%谷朊粉、2.20% TGase、121.87%冰水、23.10%大豆分离蛋白粉、11.55% HDP、2.31%复合胶（m_黄原胶∶m_魔芋胶∶m_卡拉胶=1∶1∶1）。此时,加工的素食肠弹性高达0.958。结论：该配方下的素食肠具有较好的弹性,可以应用在素食产品的生产加工中。     

蓝靛果红枣果冻的生产工艺研究

以蓝靛果果汁、红枣果肉为主要原料,魔芋精粉、卡拉胶和白砂糖等为辅料采用正交试验确定蓝靛果红枣果肉果冻的最佳工艺配方。结果表明：最佳配方为蓝靛果汁8%、红枣果肉12%、魔芋精粉与卡拉胶的混合胶0.6%和白砂糖12%。采用该配方制备的果冻呈紫红色,果香浓郁、口感爽滑。     

大鲵肉糜的凝胶特性研究

主要研究添加物、压力以及加热方式对大鲵肉糜凝胶特性和持水性的影响。研究结果表明:添加不同的添加物可以有效地改善大鲵肉糜的凝胶特性,其中可溶性淀粉和大豆分离蛋白可以显著提高大鲵肉糜的凝胶特性,乳糖和魔芋精粉可以显著提高大鲵肉糜的持水性能。压力处理会影响大鲵肉糜的凝胶特性,在500 MPa达到最佳。两段式加热由于避免了凝胶劣化,所以经两段式加热处理的大鲵肉糜的凝胶特性优于一段式加热,在生产实践中可以有效应用。     

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