小麦芽粉的应用对面包品质影响的研究

研究探讨了小麦芽粉的添加量对面包品质和面团粉质性能的影响以及小麦芽粉面包的生产工艺.实验结果表明:小麦芽粉的的使用对面包的品质具有一定的改善作用,经过烘烤处理的小麦芽粉在面包生产中的最适宜添加量为6%～8%;通过正交实验得出了麦芽面包的最佳生产工艺条件.     

紫薯桂花富硒面包的研制

以紫薯粉、桂花粉、富硒酵母等为主要原料，通过研究原料配比以及工艺参数制作紫薯桂花富硒面包。以紫薯粉添加量、桂花粉添加量、富硒酵母添加量为单因素，考察各因素对紫薯桂花富硒面包的影响，在单因素实验的基础上，结合响应面分析实验，得出紫薯桂花富硒面包制作的最佳优化条件。紫薯桂花富硒面包的最佳配方为：以小麦粉100 g计，紫薯粉添加量为10.33 g,桂花粉添加量为6.21 g,富硒酵母添加量为1.63 g。其他辅料固定用量为：黄油18 g,盐1 g,水40 g,鸡蛋15 g,糖20 g。在此配方下制作出来的面包具有紫薯风味和桂花香气，香甜可口，同时各项理化与卫生指标检测结果表明制作出的紫薯桂花富硒面包符合国家标准。     

响应面法优化富硒番薯面包的工艺

为了弥补部分人群硒摄入不足,将富硒番薯粉添加到面包中,为消费者提供一种新型的、具有保健功能的面包。通过单因素试验,响应面试验对面包的生产工艺进行优化,得到富硒番薯面包最佳配方:富硒番薯粉添加量8.51%、酵母粉添加量0.86%、蔗糖添加量5.94%,在此条件下富硒番薯面包的感官评分91.2分。     

原料及添加剂对五谷营养面包品质影响的研究

研究了燕麦、荞麦、豇豆、红豆不同的比例和添加量对五谷面包品质的影响,研究了大豆卵磷脂、α-淀粉酶、复合发酵剂及五谷粉对五谷营养面包品质的影响,通过单因素和正交实验,确定了五谷营养面包的最佳配方。结果表明:五谷面包最佳配方为:燕麦粉∶荞麦粉2∶1,豇豆粉∶红豆粉1∶2,五谷粉添加量7%,大豆卵磷脂添加量0.4%,复合发酵剂添加量为10%,α-淀粉酶添加量为25mg/kg。     

燕麦粉面包的加工及烘焙品质研究

本文研究了燕麦粉对面包的加工和品质的影响。在普通面包配方中添加5％～25％的燕麦粉替代小麦粉后,面包感官及比容评分都发生了变化;用正交试验研究了燕麦粉、活性干酵母、白砂糖和面包改良剂添加量对面包烘焙品质的影响,通过对感官评定和质构分析,确定了燕麦粉面包制作的最佳配方。即在基础配方中添加12％燕麦粉、1．4％活性干酵母和改良剂、18％白砂糖,燕麦粉面包具有较好的品质和持水性。     

燕麦粉面包的加工及烘焙品质研究

本文研究了燕麦粉对面包的加工和品质的影响。在普通面包配方中添加5％～25％的燕麦粉替代小麦粉后,面包感官及比容评分都发生了变化;用正交试验研究了燕麦粉、活性干酵母、白砂糖和面包改良剂添加量对面包烘焙品质的影响,通过对感官评定和质构分析,确定了燕麦粉面包制作的最佳配方。即在基础配方中添加12％燕麦粉、1．4％活性干酵母和改良剂、18％白砂糖,燕麦粉面包具有较好的品质和持水性。     

小米营养面包的研制

以小米粉和小麦粉为主要原料,采用一次发酵法制作营养型面包,采用粉质仪、拉伸仪和糊化仪对制作面包的原料小麦粉及混合粉进行工艺性能的分析。采用单因素和正交试验,通过对小米营养面包成品进行质构特性的测定及感官品质的鉴定,确定了小米营养面包的最佳制作配方及工艺。结果表明:水的添加量对面包烘焙品质的影响最大,其次是小米粉添加量、糖的添加量和发酵时间。制作小米营养面包的最佳配方及工艺为:以小麦粉为基准,小米粉添加量20%、水的添加量45%、糖的添加量20%、发酵时间2.5 h。另外还对小米营养面包的保存期限进行了研究,以最佳配方及工艺制作的小米营养面包在夏季常温下可保质7 d。     

菊芋在面包生产中的应用

在面包生产中随着菊芋粉添加量的增加,面包质量不同程度地下降,70目和100目菊芋粉的添加量不能超过6％;通过添加谷朊粉可提高面包质量,最佳添加量为0．6％     

响应面法优化板栗面包复合改良剂的研究

利用响应面分析法优化三种面包改良剂在板栗面包中的添加量.以板栗面包评分为评价指标,在考察单因素对板栗面包抗老化效果及面包评分影响的基础上,利用Box-Beheken响应面分析法确定三种改良剂的最佳组合.实验表明:在板栗面包制作过程中按板栗粉及面包粉总质量添加0％α-淀粉酶、1.1％黄原胶、0.3％单甘酯时,板栗面包具有良好的焙烤品质,且在贮存7d后,面包芯硬度比对照组下降46.4％,有效延缓了面包老化,延长了其货架期.     

黑米素面包的开发研究

在分析了添加黑米素对面粉流变学特性的影响基础上，通过进行4因素（黑米素的粒度，加水量，谷朊粉，SSL）3水平的正交实验及面包的储藏实验，对黑米素应用于烘焙食品中进行了初步研究，结果表明：黑米素用于面包中的最佳添加量为5％，黑米素面包的最佳配方为：82目粒度黑米素5％，SSL0．5％，加水量65％，谷朊粉3％。黑米素有明显的推迟面包老化和延长货架期的作用。     

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